CN107907884A - Object distance detection method, device, air conditioner and storage medium - Google Patents
Object distance detection method, device, air conditioner and storage medium Download PDFInfo
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- CN107907884A CN107907884A CN201710933827.1A CN201710933827A CN107907884A CN 107907884 A CN107907884 A CN 107907884A CN 201710933827 A CN201710933827 A CN 201710933827A CN 107907884 A CN107907884 A CN 107907884A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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Abstract
The invention discloses a kind of object distance detection method, applied to the air conditioner equipped with infrared emission head and infrared receiving terminal, comprise the following steps：Control infrared emission head circulates multiple ranging burst signals of the transmitting with different duty successively；Whether monitoring infrared receiving terminal receives the reflected signal of the ranging burst signal；If receiving the reflected signal, the mapping relations of the duty cycle based on the reflected signal, default duty cycle and object distance, determine the distance of current air conditioner objects in front.The invention also discloses a kind of object distance detection device, air conditioner and computer-readable recording medium.The present invention can reduce equipment cost while the basic function requirement of object distance detection is met.
Description
Technical field
The present invention relates to air conditioner technical field, more particularly to a kind of object distance detection method, device, air conditioner and meter
Calculation machine readable storage medium storing program for executing.
Background technology
In existing air conditioner technology, to provide the user with more excellent usage experience, air conditioner possesses someone's detecting functions,
Specifically for detection user whether close to air conditioner, so that according to the position between user and air conditioner or angle change, accordingly
Adjustment air conditioner goes out wind velocity and air outlet angle, so as to allow user experience more preferably.
In the prior art, the component of generally use infrared survey distance accurately measures air conditioner and (is typically used with object
The distance between family oneself), then further according to the distance, calculate and optimal go out wind velocity and air outlet angle.And infrared survey
The component typically cost of distance is higher, and this will increase the production cost of air conditioner.
The content of the invention
It is a primary object of the present invention to provide a kind of object distance detection method, device, air conditioner and computer-readable
Storage medium, it is intended to solve how to realize the technology of object distance detection with infrared receiving terminal using the infrared emission head of low cost
Problem.
To achieve the above object, the present invention provides a kind of object distance detection method, applied to equipped with infrared emission head with
The air conditioner of infrared receiving terminal, the object distance detection method comprise the following steps：
Control infrared emission head circulates multiple ranging burst signals of the transmitting with different duty successively；
Whether monitoring infrared receiving terminal receives the reflected signal of the ranging burst signal；
If receiving the reflected signal, the duty cycle based on the reflected signal, default duty cycle and object away from
From mapping relations, determine the distance of current air conditioner objects in front.
Alternatively, the difference based on duty cycle, the type of the ranging burst signal include at least：Closely ranging burst
It is signal, middle apart from ranging burst signal, remote ranging burst signal；Wherein, closely the duty cycle of ranging burst signal is small
It is less than remote ranging burst signal in middle duty cycle, the middle duty cycle apart from ranging burst signal apart from ranging burst signal
Duty cycle.
Alternatively, the duty cycle based on the reflected signal, determining the distance of current air conditioner objects in front includes：
In a pulse cycle T, the ratio between pulse the holding time T0 and T of the reflected signal is calculated,
Obtain the duty cycle of the reflected signal；
When the duty cycle of the reflected signal corresponds to closely ranging burst signal, thing in front of current air conditioner is determined
The distance of body is closely；
When the duty cycle of the reflected signal corresponds to the middle signal apart from ranging burst, thing in front of current air conditioner is determined
The distance of body is middle distance；
When the duty cycle of the reflected signal corresponds to remote ranging burst signal, thing in front of current air conditioner is determined
The distance of body is remote.
Alternatively, the reflected signal that whether the monitoring infrared receiving terminal receives the ranging burst signal includes：
Whether monitoring infrared receiving terminal receives pulse signal；
If receiving pulse signal, judge whether the coded format of the pulse signal meets the ranging burst signal
Coded format；
If meeting, judge that infrared receiving terminal receives the reflected signal of the ranging burst signal.
Alternatively, if described receive pulse signal, judge whether the coded format of the pulse signal meets the survey
Coded format away from pulse signal includes：
When the ranging burst signal of infrared emission head a length of T1 when time T2 launches, and infrared receiving terminal receives arteries and veins
When rushing signal, whether the time between the rising edge and trailing edge of the same pulse signal for judging to receive be T1, previous
Whether the time interval between the trailing edge of pulse signal and the rising edge of the latter pulse signal is T2；
If the time between the rising edge and trailing edge of the same pulse signal received is T1, previous pulse signal
Trailing edge and the latter pulse signal rising edge between time interval be T2, it is determined that the coded format of the pulse signal
Meet the coded format of the ranging burst signal.
Alternatively, if described receive pulse signal, judge whether the coded format of the pulse signal meets the survey
Coded format away from pulse signal includes：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to connect
Whether received pulse signal is cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches one
The ranging burst signal of Shi Changwei T3, then interval time T4 launch the ranging burst signal of a length of T3 at one again, then between
Enter next transmit cycle every time T5；
If the pulse signal is cyclic pulse signal, judge in same period previous adjacent rising edge of a pulse or
Whether the time between pulse falling edge be T4, the time between the rising edge of a pulse or pulse falling edge that the latter is adjacent whether
For T5；
If the time in same period between previous adjacent rising edge of a pulse or pulse falling edge is T4, the latter phase
Time between adjacent rising edge of a pulse or pulse falling edge is T5, it is determined that the coded format of the pulse signal meets the survey
Coded format away from pulse signal.
Alternatively, if described receive pulse signal, judge whether the coded format of the pulse signal meets the survey
Coded format away from pulse signal includes：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to connect
Whether received pulse signal is cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches one
The ranging burst signal of Shi Changwei T6, then interval time T7 launch the ranging burst signal of a length of T8 at one again, then between
Enter next transmit cycle every time T9；
If the pulse signal is cyclic pulse signal, judge in same period the rising edge of previous pulse signal with
Time between trailing edge whether be T6, the trailing edge of previous pulse signal and the latter pulse signal rising edge between
Whether the time is T7, whether the time between the rising edge and trailing edge of the latter pulse signal is T8, the latter pulse signal
Trailing edge and the previous pulse signal in next cycle rising edge between time whether be T9；
If time in same period between the rising edge and trailing edge of previous pulse signal is T6, previous pulse is believed
Number trailing edge and the latter pulse signal rising edge between time be T7, the rising edge of the latter pulse signal and decline
Between rising edge of the time for the previous pulse signal of T8, the trailing edge of the latter pulse signal and next cycle between
Time be T9, it is determined that the coded format of the pulse signal meets the coded format of the ranging burst signal.
Further, to achieve the above object, the present invention also provides a kind of object distance detection device, the object distance
Detection device includes：Memory, processor and it is stored in the object that can be run on the memory and on the processor
Distance detection program, the object distance detection program realize such as above-mentioned any one of them object when being performed by the processor
The step of distance detection method.
Further, to achieve the above object, the present invention also provides a kind of air conditioner, if including some infrared emission heads,
Dry infrared receiving terminal, and further include object distance detection device as described above.
Further, to achieve the above object, the present invention also provides a kind of computer-readable recording medium, the computer
Object distance detection program is stored with readable storage medium storing program for executing, the object distance detection program is realized such as when being executed by processor
The step of object distance detection method described in any of the above-described.
In the present invention, due to family expenses air conditioner generally for range accuracy requirement be not it is very high, it may be considered that adopt
With different duty signal come detection object distance.Different duty cycle signals correspond to different power, and different signal work(
Rate corresponds to the object distance difference detected, based on this principle, it can be achieved that the object distance detection of low cost.
Brief description of the drawings
Fig. 1 is the structure diagram for the object distance detection device running environment that the embodiment of the present invention is related to；
Fig. 2 is the high-level schematic functional block diagram of one embodiment of air conditioner of the present invention；
Fig. 3 is the flow diagram of one embodiment of object distance detection method of the present invention；
Fig. 4 is ranging burst signal schematic representation in one embodiment of object distance detection method of the present invention；
Fig. 5 is the application scenarios schematic diagram of one embodiment of air conditioner of the present invention；
Fig. 6 is the structure diagram of one embodiment of air conditioner of the present invention；
Fig. 7 is the coded format schematic diagram of ranging burst signal first embodiment in the present invention；
Fig. 8 is the coded format schematic diagram of ranging burst signal second embodiment in the present invention；
Fig. 9 is the coded format schematic diagram of ranging burst signal 3rd embodiment in the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
As shown in Figure 1, the structure for the object distance detection device running environment that Fig. 1, which is the embodiment of the present invention, to be related to is shown
It is intended to.
As shown in Figure 1, the object distance detection device can include：Processor 1001, such as CPU, communication bus 1002,
Memory 1003.Wherein, communication bus 1002 is used for realization the connection communication between component.Memory 1003 can be at a high speed
RAM memory or the memory of stabilization (non-volatile memory), such as magnetic disk storage.Memory 1003
The optional storage device that can also be independently of aforementioned processor 1001.
It will be understood by those skilled in the art that the hardware configuration of the object distance detection device shown in Fig. 1 is not formed
Restriction to object distance detection device, can be included than illustrating more or fewer components, either combine some components or
Different component arrangements.
As shown in Figure 1, as in a kind of memory 1003 of computer-readable recording medium can include operating system, meter
Calculation machine program, such as object distance detection program etc..Wherein, operating system be management and control object distance detection device with it is soft
The program of part resource, the operation of object distance detection program and other programs or software.
Optionally, the transmitting coded format of two kinds of pulse signals is at least stored with memory 1003.
In the object distance detection device hardware configuration shown in Fig. 1, object distance detection device passes through processor 1001
The object distance detection program stored in memory 1003 is called, to perform following operation：
Control infrared emission head circulates multiple ranging burst signals of the transmitting with different duty successively；
Whether monitoring infrared receiving terminal receives the reflected signal of ranging burst signal；
If receiving reflected signal, the mapping of the duty cycle based on reflected signal, default duty cycle and object distance
Relation, determines the distance of current air conditioner objects in front.
Further, the object distance detection device calls the object stored in memory 1003 by processor 1001
Distance detection program, to perform following operation：
In a pulse cycle T, the ratio between pulse the holding time T0 and T of reflected signal is calculated, is obtained
The duty cycle of reflected signal；
When the duty cycle of reflected signal corresponds to closely ranging burst signal, current air conditioner objects in front is determined
Distance is closely；
When the duty cycle of reflected signal corresponds to the middle signal apart from ranging burst, current air conditioner objects in front is determined
Distance is middle distance；
When the duty cycle of reflected signal corresponds to remote ranging burst signal, current air conditioner objects in front is determined
Distance is remote.
Further, the object distance detection device calls the object stored in memory 1003 by processor 1001
Distance detection program, to perform following operation：
Whether monitoring infrared receiving terminal receives pulse signal；
If receiving pulse signal, judge whether the coded format of the pulse signal meets the coding of ranging burst signal
Form；
If meeting, judge that infrared receiving terminal receives the reflected signal of ranging burst signal.
Further, the object distance detection device calls the object stored in memory 1003 by processor 1001
Distance detection program, to perform following operation：
When the ranging burst signal of infrared emission head a length of T1 when time T2 launches, and infrared receiving terminal receives arteries and veins
When rushing signal, whether the time between the rising edge and trailing edge of the same pulse signal for judging to receive be T1, previous
Whether the time interval between the trailing edge of pulse signal and the rising edge of the latter pulse signal is T2；
If the time between the rising edge and trailing edge of the same pulse signal received is T1, previous pulse signal
Trailing edge and the latter pulse signal rising edge between time interval be T2, it is determined that the coded format of the pulse signal
Meet the coded format of ranging burst signal.
Further, the object distance detection device calls the object stored in memory 1003 by processor 1001
Distance detection program, to perform following operation：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to connect
Whether received pulse signal is cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches one
The ranging burst signal of Shi Changwei T3, then interval time T4 launch the ranging burst signal of a length of T3 at one again, then between
Enter next transmit cycle every time T5；
If the pulse signal is cyclic pulse signal, judge in same period previous adjacent rising edge of a pulse or
Whether the time between pulse falling edge be T4, the time between the rising edge of a pulse or pulse falling edge that the latter is adjacent whether
For T5；
If the time in same period between previous adjacent rising edge of a pulse or pulse falling edge is T4, the latter phase
Time between adjacent rising edge of a pulse or pulse falling edge is T5, it is determined that the coded format of the pulse signal meets ranging arteries and veins
Rush the coded format of signal.
Further, the object distance detection device calls the object stored in memory 1003 by processor 1001
Distance detection program, to perform following operation：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to connect
Whether received pulse signal is cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches one
The ranging burst signal of Shi Changwei T6, then interval time T7 launch the ranging burst signal of a length of T8 at one again, then between
Enter next transmit cycle every time T9；
If the pulse signal is cyclic pulse signal, judge in same period the rising edge of previous pulse signal with
Time between trailing edge whether be T6, the trailing edge of previous pulse signal and the latter pulse signal rising edge between
Whether the time is T7, whether the time between the rising edge and trailing edge of the latter pulse signal is T8, the latter pulse signal
Trailing edge and the previous pulse signal in next cycle rising edge between time whether be T9；
If time in same period between the rising edge and trailing edge of previous pulse signal is T6, previous pulse is believed
Number trailing edge and the latter pulse signal rising edge between time be T7, the rising edge of the latter pulse signal and decline
Between rising edge of the time for the previous pulse signal of T8, the trailing edge of the latter pulse signal and next cycle between
Time be T9, it is determined that the coded format of the pulse signal meets the coded format of ranging burst signal.
With reference to Fig. 2, Fig. 2 is the high-level schematic functional block diagram of one embodiment of air conditioner of the present invention.
In the present embodiment, air conditioner is preferably cabinet air conditioner, including some infrared emission heads 10, some infrared receiving terminals
20, and for detecting the object distance detection device 30 of distance between air conditioner and object.
In the present embodiment, infrared emission head 10, infrared receiving terminal 20 be preferably directed towards on the outside of air conditioner and towards angle respectively not
It is identical.Object distance detection device 30 by control infrared emission head 10 send infrared signal, when in certain distance by object
After (such as human body) is blocked and reflected, reflected signal is received by infrared receiving terminal 20, object distance detection device 30 is again based on anti-
The mapping relations of the duty cycle of signal, default duty cycle and object distance are penetrated, determine the distance of current air conditioner objects in front.
Based on above-mentioned hardware configuration, each embodiment of proposition object distance detection method of the present invention.
With reference to Fig. 3, Fig. 3 is the flow diagram of one embodiment of object distance detection method of the present invention.In the present embodiment, thing
Body distance detection method is applied particularly to be equipped with the air conditioner of infrared emission head and infrared receiving terminal, comprises the following steps：
Step S10, control infrared emission head circulate multiple ranging burst signals of the transmitting with different duty successively；
Different duty cycle pulse signals corresponds to different signal powers.High-power signal, can increase infrared emission head
10 transmission power, so as to can detect the object of farther distance.And the signal of low-power, the hair of infrared emission head 10 can be reduced
Power is penetrated, so that the object of closer distance may only be detected.
As shown in figure 4, the difference based on duty cycle, the type of ranging burst signal includes at least：Closely ranging burst
It is signal, middle apart from ranging burst signal, remote ranging burst signal；Wherein, closely the duty cycle of ranging burst signal is small
It is less than remote ranging burst signal in middle duty cycle, the middle duty cycle apart from ranging burst signal apart from ranging burst signal
Duty cycle.
The object distance that the present embodiment can be detected for various ranging burst signals is unlimited, such as closely ranging burst
Signal can detect object within 1 meter, the middle object that can be then detected apart from ranging burst signal within 1 meter to 3 meters, long distance
The object more than 3 meters can be then detected from ranging burst signal.
In the present embodiment, object distance detection device 30, which controls infrared emission head to circulate transmitting successively, has different duty
Multiple ranging burst signals, such as one circulate transmit cycle in, object distance detection device 30 first launches multiple low coverages
From ranging burst signal, then launch again multiple middle apart from ranging burst signal, finally launch multiple remote ranging bursts again
Signal.
Whether step S20, monitoring infrared receiving terminal receive the reflected signal of ranging burst signal；
Step S30, if receiving reflected signal, the duty cycle based on reflected signal, default duty cycle and object away from
From mapping relations, determine the distance of current air conditioner objects in front.
In the present embodiment, memory 1003 is stored with the mapping relations of signal dutyfactor and object distance, such as table 1 below institute
Show.
Table 1
| The duty cycle of pulse signal | The distance between object and air conditioner |
| 0.25 | Closely (within 1 meter) |
| 0.5 | Middle distance (within 1 meter to 3 meters) |
| 0.75 | At a distance (more than 3 meters) |
After infrared receiving terminal 20 receives reflected signal, duty cycle of the object distance detection device 30 based on reflected signal,
The mapping relations of above-mentioned table 1, may thereby determine that the approximate distance of current air conditioner objects in front.
In the present embodiment, due to family expenses air conditioner generally for range accuracy requirement be not it is very high, it may be considered that
Using different duty signal come detection object distance.Different duty cycle signals correspond to different power, and different signals
Power corresponds to the object distance difference detected, and based on this principle, infrared emission head, the infrared receiving terminal that can pass through low cost are real
The object distance detection of existing low cost, finally realizes the low cost of air conditioner.
With reference to Fig. 5, Fig. 5 is the application scenarios schematic diagram of one embodiment of air conditioner of the present invention.
With reference to Fig. 6, Fig. 6 is the structure diagram of one embodiment of air conditioner of the present invention.The present embodiment is specifically with infrared inspection
The cabinet air conditioner for surveying component is illustrated.
As shown in fig. 6, the air-supply region of cabinet air conditioner is in turn divided into upper air-supply according to sequence of positions from top to bottom
3 three region 1, middle air-supply region 2, lower air-supply region independent air-supply regions, pass through between three independent air-feeding regions respectively
The infrared detection component 4,5 of two different heights is separated, and each infrared detection component is including multiple infrared emission heads and extremely
A few infrared receiving terminal.Each air-supply region is corresponding with independent air-supply assembly, includes at least：Vertical wind deflector 6, wind wheel
(not indicating), wherein, vertical wind deflector 6 is equipped with multiple apertures, and wind speed is reduced out available for when vertical wind deflector 6 is closed
Degree.
In the present embodiment, cabinet air conditioner can the testing result based on infrared detection component 4,5, corresponding control respectively send subregion
The ventilation state in domain, includes whether air-supply, wind-force size, wind direction.Such as air-supply region air-supply 1, middle blow zones in control
Domain 2 is not blown with lower air-supply region 3, so that the calm sense function of cabinet air conditioner, sense more calm than following air-supply region can be realized
The calm sense function of function, upper air-supply region.
In the present embodiment, object distance detection device 30 controls the infrared emission head of infrared detection component 4,5 successively respectively
Multiple ranging burst signals of the circulation transmitting with different duty, and connect by the infrared receiving terminal of infrared detection component 4,5
The mapping relations of the duty cycle of the reflected signal of receipts, default duty cycle and object distance, determine current air conditioner objects in front
Distance, such as closely, it is middle distance, remote.
In the present embodiment, the controller of cabinet air conditioner can be based on the distance between detection object and air conditioner size, inspection
The height of object is surveyed, performs corresponding calm sense control function.
For example, when detection object is nearer apart from air conditioner, controller control three air-supply regions of upper, middle and lower are blown at the same time,
But wind speed is relatively low；When detection object apart from air conditioner farther out when, two air-supply regions are blown at the same time during controller control is upper, but wind
Speed is larger；When detection object is far apart from air conditioner, the upper air-supply region of controller control is individually blown and wind speed is very big, so that
In customer location dynamic changing process, user experience is lifted.
In another example when detection object is located at the front of cabinet air conditioner, air conditioner is carrying out infrared sensing identification process
In, after infrared detection component 4 receives the infrared signal of wall reflection, calculate the distance of infrared detection component 4 and wall
S1；After the infrared signal that infrared detection component 5 receives detection object reflection, infrared detection component 5 and wall are calculated
Distance S2.At this time, in addition to determining there are detection object, (S1-S2) value can also further be calculated.Obviously, as (S1-S2)
Value is more than default threshold value, such as at 30 centimetres, it is possible to determine that detection object is children.Further, cabinet air conditioner can base
Corresponding protection of the child strategy is performed in the testing result of infrared detection component 4,5, such as air-supply region 2, lower air-supply in reducing
The wind speed in region 3, close in air-supply region 2, the vertical wind deflector 6 of lower air-supply region 3 so that reduce the wind speed for blowing to children and
Air quantity, avoids causing children's cold.Particularly, infrared detection component 4,5 can be pacified according to default children's average height value
Fill the setting of height.For example, it is assumed that children's average height value is 120 centimetres, then the setting height(from bottom) of infrared detection component 4 is set
For 140 centimetres, the setting height(from bottom) of infrared detection component 5 is arranged to 100 centimetres.
Further alternative, object distance detection method of the present invention can also be applied to band infrared detection component hanging air conditioner
Device, it is essentially identical with cabinet air conditioner for the object distance detection under such application scenarios, therefore do not do and excessively repeat.
Further, in one embodiment of object distance detection method of the present invention, in above-mentioned steps S30：Believed based on reflection
Number duty cycle, determine that the distance of current air conditioner objects in front specifically includes following steps：
In a pulse cycle T, the ratio between pulse the holding time T0 and T of reflected signal is calculated, is obtained
The duty cycle of reflected signal；
When the duty cycle of reflected signal corresponds to closely ranging burst signal, current air conditioner objects in front is determined
Distance is closely；
When the duty cycle of reflected signal corresponds to the middle signal apart from ranging burst, current air conditioner objects in front is determined
Distance is middle distance；
When the duty cycle of reflected signal corresponds to remote ranging burst signal, current air conditioner objects in front is determined
Distance is remote.
In the present embodiment, after object distance detection device 30 receives reflected signal by infrared receiving terminal 20, first calculate
The duty cycle of the reflected signal, then determines the distance of current air conditioner objects in front again.
Duty cycle specifically refers to significant level time ratio shared within a cycle, be embodied as duty cycle=
T0/T, wherein, T represents a pulse cycle, and T0 represents the pulse holding time in a pulse cycle.
Duty cycle of the object distance detection device 30 based on the reflected signal being calculated, the mapping relations of above-mentioned table 1, from
And it can determine the approximate distance of current air conditioner objects in front.
Further, in another embodiment of object distance detection method of the present invention, above-mentioned steps S20 further comprises：
Whether step S201, monitoring infrared receiving terminal receive pulse signal；
Step S202, if receiving pulse signal, judges whether the coded format of the pulse signal meets ranging burst
The coded format of signal；
Step S203, if meeting, judges that infrared receiving terminal receives the reflected signal of ranging burst signal；
Step S204, if not meeting, judges that infrared receiving terminal receives disturbing pulse signal.
In the routine use scene of air conditioner, what pulse signal and the infrared receiving terminal of infrared emission head transmitting received
Pulse signal had both been possible to identical, it is also possible to different (for example what is received is disturbing pulse signal).Therefore, to avoid object
Erroneous judgement in detection process, further carries out corresponding judgement processing in the present embodiment to disturbing pulse signal.
If the coded format for the pulse signal that infrared receiving terminal 20 receives meets the coded format of ranging burst signal,
Object distance detection device 30 judge infrared receiving terminal receive be ranging burst signal reflected signal, it is on the contrary then be disturb
Pulse signal.
It is unlimited for the coded format of ranging burst signal in the present invention, it is preferably based on the width of pulse signal, adjacent arteries and veins
The width rushed between signal designs the coded format of ranging burst signal.
Pre-arranged code form one：The width stationary phase for the ranging burst signal launched every time is same, each adjacent ranging burst
Interval width stationary phase between signal is same；
Pre-arranged code form two：The width stationary phase for the ranging burst signal launched every time is same, each adjacent ranging burst
Interval width between signal differs；
Pre-arranged code form three：The width for the ranging burst signal launched every time differs, each adjacent ranging burst letter
Interval width between number differs.
In the present invention, if infrared receiving terminal receives pulse signal, object distance detection device 30 is specifically based on ranging
Pulse signal sets coded format, judges the rising edge and/or trailing edge of each pulse signal, for determining the pulse signal
Whether the interval width between width and adjacent ranging burst signal meets the coded format of ranging burst signal.
For ease of illustration object distance detection device 30 is for the specific deterministic process of pulse-code form, lower mask
Body by being illustrated three kinds of different coded formats of ranging burst signal respectively.
Coded format embodiment one：
The ranging burst signal of a length of T1 when time T2 launches of infrared emission head 10, and infrared receiving terminal 20 receives
Pulse signal.The coded format schematic diagram of ranging burst signal first embodiment as shown in Figure 7.
In the present embodiment, when the ranging burst signal of a length of T1 when time T2 launches of infrared emission head 10, and it is infrared
When reception first 20 receives pulse signal, object distance detection device 30 judges the rising edge and trailing edge of same pulse signal
Between time whether be T1, the trailing edge of previous pulse signal and the latter pulse signal rising edge between time between
Every whether being T2；
If the time between the rising edge and trailing edge of same pulse signal is T1, the trailing edge of previous pulse signal
Time interval between the rising edge of the latter pulse signal is T2, then object distance detection device 30 determines the pulse signal
Coded format meet the coded format of ranging burst signal.
As shown in fig. 7, object distance detection device 30 controls infrared delivery header 10 when the transmitting of preset time T 2 is default
One section of pulse signal of a length of T1, its pulse frequency can be believed using selected as 38KHZ or 56KHz or other frequency ranges as infrared carrier wave
Number, to receive a general infrared receiving terminal reception detection pulse signal with remote controler using existing.
Infrared carrier wave pulse is received by infrared receiving terminal 20, and is converted into a corresponding pulse signal, then
Object distance detection device 30 judges rising edge and the trailing edge of each pulse to determine between pulse width and adjacent pulse
Width.
When judging the time between adjacent rising edge and trailing edge for T1, and the time between next rising edge is
T2, you can it is the ranging burst that infrared delivery header 10 is launched and rebounds back to be determined as the pulse signal that infrared receiving terminal 20 receives
Signal.For example, T1 is 1ms, T2 4ms.This scheme pulse transmitting terminal coding is simple, and receiving terminal needs to judge rising edge and decline
Edge, receiving terminal judge relative complex.
Coded format embodiment two：
10 periodic emission ranging burst signal of infrared emission head, wherein, in a transmit cycle, infrared emission head is first sent out
The ranging burst signal of a length of T3 at one is penetrated, then interval time T4 launches the ranging burst signal of a length of T3 at one again,
Then interval time T5 enters next transmit cycle.The coded format of ranging burst signal second embodiment as shown in Figure 8 is shown
It is intended to.
In the present embodiment, when 10 periodic emission ranging burst signal of infrared emission head, and infrared receiving terminal receives 20 and arrives arteries and veins
When rushing signal, object distance detection device 30 judges whether pulse signal is cyclic pulse signal；
If the pulse signal is cyclic pulse signal, object distance detection device 30 judges previous in same period
Whether the time between adjacent rising edge of a pulse or pulse falling edge be T4, under the rising edge of a pulse that the latter is adjacent or pulse
Whether time of the drop between is T5；
If the time in same period between previous adjacent rising edge of a pulse or pulse falling edge is T4, the latter phase
Time between adjacent rising edge of a pulse or pulse falling edge is T5, then object distance detection device 30 can determine that the pulse signal
Coded format meet the coded format of ranging burst signal.
As shown in figure 8, object distance detection device 30 controls infrared delivery header 10 to launch one section of arteries and veins that preset duration is T3
Punching, its pulse frequency can with selected as 38KHZ or 56KHz or other frequency ranges as infrared carrier wave signal, with using it is existing with it is distant
Control device and receive a general infrared receiving terminal reception detection, launch one section of arteries and veins of preset duration degree T3 after interval time T4 again
Rush, launch one section of pulse of preset duration degree T3 after interval time T5 again, circulate successively.
Infrared carrier wave pulse is received by infrared receiving terminal 20, and is converted into a corresponding pulse signal, then
Object distance detection device 30 judges rising edge and the trailing edge of each pulse to determine between pulse width and adjacent pulse
Width.
When judging time of the adjacent rising edge either between trailing edge for T4 and in next rising edge or trailing edge
Between time be T5, you can be determined as the pulse signal that infrared receiving terminal 20 receives and launch and rebound for infrared delivery header 10
The ranging burst signal returned.For example, T3 is 1ms, T4 1ms, T5 4ms.This scheme transmitting terminal signaling is relative complex, receiving terminal
Only need to judge the interval time of rising edge or trailing edge, receiving terminal judges relatively easy.
Coded format embodiment three：
10 periodic emission ranging burst signal of infrared emission head, wherein, in a transmit cycle, infrared emission head 10 is first
Transmitting one when a length of T6 ranging burst signal, then interval time T7 launch again a length of T8 at one ranging burst letter
Number, then interval time T9 enters next transmit cycle.The coded format of ranging burst signal 3rd embodiment as shown in Figure 9
Schematic diagram.
In the present embodiment, when infrared emission head periodic emission ranging burst signal, and infrared receiving terminal receives pulse letter
Number when, object distance detection device 30 judges whether pulse signal is cyclic pulse signal；
If the pulse signal is cyclic pulse signal, object distance detection device 30 judges previous in same period
Whether the time between the rising edge and trailing edge of pulse signal be T6, the trailing edge of previous pulse signal and the latter pulse
Whether the time between the rising edge of signal be T7, the time between the rising edge and trailing edge of the latter pulse signal whether be
Time between the rising edge of the previous pulse signal of T8, the trailing edge of the latter pulse signal and next cycle whether be
T9；
If time in same period between the rising edge and trailing edge of previous pulse signal is T6, previous pulse is believed
Number trailing edge and the latter pulse signal rising edge between time be T7, the rising edge of the latter pulse signal and decline
Between rising edge of the time for the previous pulse signal of T8, the trailing edge of the latter pulse signal and next cycle between
Time be T9, then object distance detection device 30 can determine that the coded format of the pulse signal meets the volume of ranging burst signal
Code form.
As shown in figure 9, object distance detection device 30 controls infrared delivery header 10 to launch one section of arteries and veins that preset duration is T6
Punching, its pulse frequency can with selected as 38KHZ or 56KHz or other frequency ranges as infrared carrier wave signal, with using it is existing with it is distant
Control device and receive a general infrared receiving terminal reception detection, launch one section of arteries and veins of preset duration degree T8 after interval time T7 again
Rush, after interval time T9, circulation transmitting successively.
Infrared carrier wave pulse is received by infrared receiving terminal 20, and is converted into a corresponding pulse signal, then
Object distance detection device 30 judges rising edge and the trailing edge of each pulse to determine between pulse width and adjacent pulse
Width.
When judging the time between adjacent rising edge and trailing edge for T6, and the time between next rising edge is
T7, the time of next trailing edge is T6+T7, that is, the pulse that a width is T7 is received after being spaced the T6 times, when being spaced T9
Between within without next rising edge occur, you can it is infrared delivery header 10 to be determined as the pulse signal that infrared receiving terminal 20 receives
The ranging burst signal launched and rebounded back.
Such as T6 is 1ms, T7 2MS, T8 3ms, T9 4ms.This scheme transmitting terminal signaling is relative complex, and receiving terminal is same
When need to judge rising edge or trailing edge, receiving terminal judge it is relative complex, it is relative complex due to encoding, it is anti-interference by force
Degree is high.
The present invention also provides a kind of computer-readable recording medium applied to object distance detection device.
In the present embodiment, computer-readable recording medium storage has object distance to detect program, object distance detection journey
The step in above-mentioned object distance detection method any embodiment is realized when sequence is executed by processor.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme substantially in other words does the prior art
Going out the part of contribution can be embodied in the form of software product, which is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal (can be mobile phone, computer, services
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make very much
Form, every equivalent structure or equivalent flow shift made using description of the invention and accompanying drawing content, directly or indirectly
Other related technical areas are used in, these are belonged within the protection of the present invention.
Claims (10)
1. a kind of object distance detection method, applied to the air conditioner equipped with infrared emission head and infrared receiving terminal, its feature exists
In the object distance detection method comprises the following steps：
Control infrared emission head circulates multiple ranging burst signals of the transmitting with different duty successively；
Whether monitoring infrared receiving terminal receives the reflected signal of the ranging burst signal；
If receiving the reflected signal, the duty cycle based on the reflected signal, default duty cycle and object distance
Mapping relations, determine the distance of current air conditioner objects in front.
2. object distance detection method as claimed in claim 1, it is characterised in that the difference based on duty cycle, the ranging
The type of pulse signal includes at least：Closely ranging burst signal, it is middle apart from ranging burst signal, remote ranging burst believe
Number；Wherein, closely the duty cycle of ranging burst signal is less than middle duty cycle apart from ranging burst signal, middle distance ranging arteries and veins
The duty cycle for rushing signal is less than the duty cycle of remote ranging burst signal.
3. object distance detection method as claimed in claim 2, it is characterised in that the duty based on the reflected signal
Than determining the distance of current air conditioner objects in front includes：
In a pulse cycle T, the ratio between pulse the holding time T0 and T of the reflected signal is calculated, is obtained
The duty cycle of the reflected signal；
When the duty cycle of the reflected signal corresponds to closely ranging burst signal, current air conditioner objects in front is determined
Distance is closely；
When the duty cycle of the reflected signal corresponds to the middle signal apart from ranging burst, current air conditioner objects in front is determined
Distance is middle distance；
When the duty cycle of the reflected signal corresponds to remote ranging burst signal, current air conditioner objects in front is determined
Distance is remote.
4. object distance detection method as claimed in claim 1, it is characterised in that whether the monitoring infrared receiving terminal receives
Reflected signal to the ranging burst signal includes：
Whether monitoring infrared receiving terminal receives pulse signal；
If receiving pulse signal, judge whether the coded format of the pulse signal meets the coding of the ranging burst signal
Form；
If meeting, judge that infrared receiving terminal receives the reflected signal of the ranging burst signal.
5. object distance detection method as claimed in claim 4, it is characterised in that if described receive pulse signal, sentence
The coded format whether coded format of the disconnected pulse signal meets the ranging burst signal includes：
When the ranging burst signal of infrared emission head a length of T1 when time T2 launches, and infrared receiving terminal receives pulse letter
Number when, whether the time between the rising edge and trailing edge of the same pulse signal for judging to receive be T1, previous pulse
Whether the time interval between the trailing edge of signal and the rising edge of the latter pulse signal is T2；
If the time between the rising edge and trailing edge of the same pulse signal received is T1, under previous pulse signal
Drop is T2 along the time interval between the rising edge of the latter pulse signal, it is determined that the coded format of the pulse signal meets
The coded format of the ranging burst signal.
6. object distance detection method as claimed in claim 4, it is characterised in that if described receive pulse signal, sentence
The coded format whether coded format of the disconnected pulse signal meets the ranging burst signal includes：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to receive
Pulse signal whether be cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches a duration
For the ranging burst signal of T3, then interval time T4 launches the ranging burst signal of a length of T3 at one again, when being then spaced
Between T5 enter next transmit cycle；
If the pulse signal is cyclic pulse signal, previous adjacent rising edge of a pulse or pulse in same period are judged
Whether the time between trailing edge be T4, the time between the rising edge of a pulse or pulse falling edge that the latter is adjacent whether be
T5；
If time in same period between previous adjacent rising edge of a pulse or pulse falling edge is T4, the latter is adjacent
Time between rising edge of a pulse or pulse falling edge is T5, it is determined that the coded format of the pulse signal meets the ranging arteries and veins
Rush the coded format of signal.
7. object distance detection method as claimed in claim 4, it is characterised in that if described receive pulse signal, sentence
The coded format whether coded format of the disconnected pulse signal meets the ranging burst signal includes：
When infrared emission head periodic emission ranging burst signal, and when infrared receiving terminal receives pulse signal, judge to receive
Pulse signal whether be cyclic pulse signal；Wherein, in a transmit cycle, infrared emission head first launches a duration
For the ranging burst signal of T6, then interval time T7 launches the ranging burst signal of a length of T8 at one again, when being then spaced
Between T9 enter next transmit cycle；
If the pulse signal is cyclic pulse signal, the rising edge of previous pulse signal and decline in same period are judged
Along between time whether be T6, the trailing edge of previous pulse signal and the latter pulse signal rising edge between time
Whether be T7, the time between the rising edge and trailing edge of the latter pulse signal whether be T8, under the latter pulse signal
Whether drop is T9 along the time between the rising edge of the previous pulse signal in next cycle；
If time in same period between the rising edge and trailing edge of previous pulse signal is T6, previous pulse signal
Time between the rising edge of trailing edge and the latter pulse signal for T7, the rising edge of the latter pulse signal and trailing edge it
Between time be T8, the trailing edge of the latter pulse signal and next cycle previous pulse signal rising edge between when
Between be T9, it is determined that the coded format of the pulse signal meets the coded format of the ranging burst signal.
8. a kind of object distance detection device, it is characterised in that the object distance detection device includes：Memory, processor
And it is stored in the object distance detection program that can be run on the memory and on the processor, the object distance inspection
The step of the object distance detection method as any one of claim 1-7 is realized when ranging sequence is performed by the processor
Suddenly.
9. a kind of air conditioner, including some infrared emission heads, some infrared receiving terminals, it is characterised in that the air conditioner also wraps
Include the object distance detection device described in claim 8.
A kind of 10. computer-readable recording medium, it is characterised in that be stored with the computer-readable recording medium object away from
From detection program, the object distance detection program is realized as any one of claim 1-7 when being executed by processor
The step of object distance detection method.
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