CN2741060Y - Ultrasonic range displaying and alarming device in short distance - Google Patents
Ultrasonic range displaying and alarming device in short distance Download PDFInfo
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- CN2741060Y CN2741060Y CN 200420086103 CN200420086103U CN2741060Y CN 2741060 Y CN2741060 Y CN 2741060Y CN 200420086103 CN200420086103 CN 200420086103 CN 200420086103 U CN200420086103 U CN 200420086103U CN 2741060 Y CN2741060 Y CN 2741060Y
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Abstract
The utility model relates to a displaying and alarming device for an ultrasonic distance measurement in a short distance, comprising an ultrasonic emitting circuit connected with an ultrasonic receiving circuit. The ultrasonic receiving circuit is connected with an amplitude comparison circuit connected with a control compensation circuit, and the control compensation circuit is divided into two parts which are respectively connected with a liquid crystal display circuit and an alarm circuit. The utility model has a simple structure, a small volume, light weight, the preservation of the eyesight and the fatigue proof of the eyesight; besides, a programming design, an online distance measurement and a comparison alarm circuit are added, the online monitoring is realized, and the utility model is used to alarm in the visual range of video equipment. The utility model provides a distance alarming function for the dangerous equipment with an elevated temperature, a high voltage and a radioactivity, and the dangerous equipment which are inflammable, explosive and toxic are also provided with the distance alarming function. The accident and the approach of the personnel are avoided, the utility model provides remote sensing measurement in a short distance, and the remote sensing measurement which is portable has small accuracy; besides, the utility model which can be used in the remote sensing distance measurement in a house brings convenience to the operation such as the interior decoration and measurement, the certainty of the measurement is 1 centimeter, and a better socioeconomic benefit is provided.
Description
Technical field
The utility model relates to the ultrasonic ranging displaying alarm, is specially adapted to a kind of ultrasonic proximity range finding displaying alarm.
Background technology
Ultrasound wave is produced by mechanical vibration, can propagate with different speed in different medium.Because hyperacoustic directive property is strong, energy consumption is slow, and the distance of propagating in medium is far away, and reflection potential is stronger when running into barrier in communication process, thereby ultrasound wave is through being usually used in the measurement of distance.Utilize ultrasound wave detect comparison rapidly, convenient, calculate simple, be easy to accomplish the advantage of control in real time.Simultaneously hyperacoustic mechanical wave characteristic also determines it to be applied in the measurement, is subjected to the influence of medium medium to make error generally all between 1～5%, and error is bigger in the long range measurements more than 10m, is not suitable for doing the accurate measurement of remote sensing class.But, in reporting to the police, less demanding thick spacious class remote sensing range finding is used widely because it is cheap.As measurement of reversing radar of vehicle, industrial working telemetry, careat etc.But the device that is used for close-in measurement does not also have product to come out so far, does not especially sell on city's field boundary at the distance measuring equipment between 30cm～10m.
Summary of the invention
Goal of the invention of the present utility model provides a kind of simple in structure, and volume is little, and is in light weight, sight protectio, the anti-tired a kind of ultrasonic proximity range finding displaying alarm of eyesight.
The technical scheme that realizes goal of the invention is to solve like this: amplify six circuit such as comparator circuit, control compensation circuit, liquid crystal display circuit, warning circuit by ultrasonic emitting, receiving circuit, signal and form.Its improvements of the present utility model are that ultrasonic transmit circuit links to each other with the ultrasound wave receiving circuit, the ultrasound wave receiving circuit links to each other with the amplification comparator circuit, amplify comparator circuit and link to each other with the control compensation circuit, the control compensation circuit divides two-way to link to each other with liquid crystal display circuit, warning circuit respectively.
The utility model is compared with prior art, and is simple in structure, and volume is little, in light weight, and sight protectio, the anti-fatigue of eyesight increase programmed, increase online range finding and comparison warning circuit, realize on-line monitoring, can use following field preferably, finish following function:
1. report to the police in the face of the visual range of video equipment.Provide the distance alarm protection for working long hours the preceding personnel of video equipment (computer display, television screen etc.), can prevent the radiation injury of radio frequency effectively eyes.
2. can provide based on the screen warning in limited time of service time, can prevent to use for a long time the kopiopia of using of screen.
3. for dangerous equipment (high temperature, high pressure, radioactivity, inflammable and explosive, toxic etc.) provides distance alarm, the personnel that prevent are close, avoid accident.
4. portable, short distance, little precision remote sensing survey are provided.Can be used for indoor remote sensing range observation, measuring accuracy is 1 centimetre.For work such as interior decoration measurement bring convenience.
Technical indicator
Resolution: 1CM
Ranging: 0.4M～11M
Precision: ± (1CM+0.5% * distance)
Operating temperature range: 0 ℃～40 ℃
The volume of this device is 4cm * 6cm * 9cm, and charged source weight only has 60 grams, and in similar remote sensing stadimeter, it is minimum the lightest.Portable, from charged pool.This product carries the 9V dc battery, can carry, and can arbitrarily place, and can enter characteristics such as duty immediately, and is of many uses, has good social and economic benefit.
Description of drawings
Fig. 1 is the utility model circuit structure schematic block diagram;
Fig. 2 is the ultrasonic transmit circuit schematic diagram of Fig. 1;
Fig. 3 is the ultrasound wave receiving circuit schematic diagram of Fig. 1;
Fig. 4 is that the amplification ratio of Fig. 1 is than circuit theory diagrams;
Fig. 5 is the control compensation circuit theory diagrams of Fig. 1;
Fig. 6 is the liquid crystal display circuit schematic diagram of Fig. 1;
Fig. 7 is the warning circuit schematic diagram of Fig. 1.
Embodiment
Accompanying drawing is embodiment of the present utility model
Below in conjunction with accompanying drawing summary of the invention of the present utility model is described further:
With reference to shown in Figure 1, ultrasonic transmit circuit 1 links to each other with ultrasound wave receiving circuit 2, ultrasound wave receiving circuit 2 links to each other with amplification comparator circuit 3, amplifies comparator circuit 3 and links to each other with control compensation circuit 4, and 4 fens two-way of control compensation circuit link to each other with liquid crystal display circuit 5, warning circuit 6 respectively.
Figure 2 shows that the ultrasonic transmit circuit schematic diagram of Fig. 1, the characteristics of native system circuit be utilize the hyperacoustic emission of Single-chip Controlling and to the ultrasound wave self-emission to the timing that receives two-way time.Comprise transmitting probe JP1, inductance L 1, triode Q1 etc. form ultrasonic transmit circuit, the two ends of its transmitting probe JP1 link to each other with the two ends of telefault L1 respectively, the capacitor C 1 that the output terminal of telefault L1 links to each other with ground links to each other with the collector with triode Q1, the grounded emitter of triode Q1, on the base stage of triode Q1 successively with ground and connecting resistance R4 and series resistor R2, the diode D1 in addition that between resistance R 4 and resistance R 2, is connected with ground, the output terminal of resistance R 2 is connected with 19 pin of one-chip computer module U3, on the node of telefault L1 one end, divide the 8th pin that two-way inserts comparer U1A respectively and the collector of triode Q4 to link to each other again, simultaneously in the bypass also with ground shunt capacitance C7, the emitter of triode Q4 and the resistance R 5 common crus secundas that insert fuse F1, connect resistance R 5 other ends on the base stage of triode Q4 and be connected in series a resistance R 1, the other end of resistance R 1 links to each other with triode Q2 collector, the grounded emitter of triode Q2, the base stage series resistor R13 of triode Q2 also links to each other with the 7th pin of U3.Transmitting probe JP1, inductance L 1, triode Q1 etc. form ultrasonic transmit circuit in this schematic diagram.Transmitting probe JP1 adopts the ultrasonic sensor of T40 model, and its operating voltage is the pulse signal of 40KHz.The pulse signal of this 40KHz is produced by single-chip microcomputer U3-19 pin, and lasting 250Us, and this series impulse is added on the L1 by Q1, directly drives ultrasonic emitting probe JP1 after boosting through L1, thereby sends the ultrasound wave of 40KHz.Begin counting at the hyperacoustic while single-chip microcomputer internal counter of emission.The circuit that triode Q4 and Q2 form is guaranteed to stop to launch ultrasound wave when signal receiving circuit is worked.Entire circuit can the intermittent transmission ultrasound wave under the effect of control chip U3.
Figure 3 shows that the ultrasound wave receiving circuit schematic diagram of Fig. 1, the end of receiving transducer JP2-1 is connected in an end of resistance R 7 in parallel, with also linking to each other with the 5th pin of comparer U1B, the end of receiving transducer JP2-2 and an end of resistance R 8, the other end of resistance R 7, one end of capacitor C 8 links to each other, the other end of capacitor C 8 links to each other with an end of resistance R 6, another node links to each other with the 3rd pin of comparer U1A between resistance R 8 and resistance R 7 nodes, in resistance R 8 node bypasses, connect a capacitor C 9, the other end ground connection of capacitor C 9, simultaneously, resistance R 8 nodes also link to each other with chip U6-2 pin, bypass input end at U6 is connected to capacitor C 11, capacitor C 11 is connected to again on power supply and the zero line, be connected with resistance R 5 and fuse F1 one end respectively on the node of chip U6-1, another termination one switch SW of fuse F1, another termination direct supply of switch SW PW.After JP1 sent ultrasound wave, ultrasound wave was propagated at the air cathetus, reflects immediately when running into barrier.Accept circuit have can detection of echoes function, it is made up of receiving transducer JP2, U6 etc.
The ultrasound wave amplification ratio that Figure 4 shows that Fig. 1 is than circuit theory diagrams, comparer U1B-5 is connected with receiving transducer JP2, comparer U1B-6 is series resistor R9, capacitor C 3, resistance R 6 successively, series resistor R10, capacitor C 6 between capacitor C 3, the resistance R 6, the other end of capacitor C 6, resistance R 9 is connected with comparer U1B-7, and resistance R 6 is connected with capacitor C 8.Comparer U1B-7 also is connected with resistance R 20, the other end serial connection capacitor C 4 of resistance R 20, resistance R 11, capacitor C 5, the other end ground connection of resistance R 11, the other end of capacitor C 5 links to each other with comparer U1A-1, the other end of capacitor C 4 is connected to comparer U1A-2 negative pole, parallel resistance R22 between comparer U1A-1 and comparer U1A-2, comparer U1A-1 pin output terminal serial connection capacitor C 2, the other end of capacitor C 2 respectively with resistance R 17, variable resistor VR1, comparer U2B-5 pin connects, resistance R 17 other ends are connected on the capacitor C 9, resistance R 15 1 ends are connected with variable resistor VR1 one end, resistance R 15 other ends are connected with capacitor C 9 one ends, the variable resistor VR1 other end removes and comparer U2B-5, outside 6 pin connect, series resistor R12 also, the other end ground connection of resistance R 12, in the bypass of resistance R 12, also be connected with capacitor C 13 respectively, resistance R 3 capacitor C 13 are held ground connection in addition, the other end of resistance R 3 is concatenated on the triode Q3 collector, the grounded emitter of triode Q3, base stage is connected with resistance R 16, resistance R 16 is received on the 8th pin of U3, comparer U2B-7 pin is except that with the 9th pin of U3 is connected, capacitor C 12 in parallel in the bypass, capacitor C 12 other end ground connection, the negative pole of comparer U2A and resistance R 15, resistance R 17, the other end of capacitor C 9 connects, the anodal two ends resistance in series R14 of comparer U2A, resistance R 21, resistance R 14 other end ground connection, resistance R 21 another termination capacitor C 10 and transmitting probe JP1-2 one end connect, usually the echoed signal that receives of receiving transducer a little less than, therefore adopt the U1 two stage amplifer at receiving unit, echoed signal is amplified, the echoed signal of amplifying is carried out voltage ratio through the one-level of delivering to comparer U2 behind the integration, and reference voltage relatively is by R15, VR1, generations such as R13.When the signal voltage of echo during greater than reference voltage, the 7th pin of U2 produces a low level, as inside counting look-at-me.The effect of the other one-level comparer U2A of U2 is in low voltage detection of the outside generation of single-chip microcomputer.
Fig. 5 is the control compensation circuit theory diagrams, the 3rd pin of chip U3 is connected with chip U5-2 pin, the 4th of chip U3,5,6 pin connect K switch 7 respectively, K6, K8, K4, K5, K3, K2, K1, K switch 8 one end ground connection, K switch 6, the terminating diode D3 of K7, D2, diode D3, the D2 other end inserts the 21st of chip U3 respectively, on 22 pin, the 20th of chip U3, be linked into respectively on 19 pin on the 1st pin and resistance R 2 of chip U4, the 17th of chip U3, be connected in series capacitor C 14 on 18 pin respectively, capacitor C 15 and oscillator X1, be connected with resistance R 23 in turn on the 16th pin of chip U3, diode D4, capacitor C 16, other end serial connection capacitor C 17 and the ground connection of diode D4, on the 15th pin of chip U3 successively with resistance R 23, the other end of diode D4 connects, the 13rd pin inserts on the comparer U2A-1, the 5th pin is serially connected with resistance R T1, resistance R 19, resistance R T1, node inserts again on the 10th pin between the resistance R 19, resistance R 19 inserts on the power supply, the 11st, 12 pin ground connection, the 7th pin inserts resistance R 13, the 8th pin inserts resistance R 16, the 8th pin inserts on the U2B, resistance R 19, node inserts on the 10th pin of chip U3 between the resistance R T1.R19, RT1 composing environment temperature test circuit are for measurement provides temperature compensation.After the Single Chip Microcomputer (SCM) system counter stops counting, system will preserve count value, and calculate distance between transmitting probe JP1 and the barrier by a series of computing.And then on LCD, demonstrate distance.
Fig. 6 is the liquid crystal display circuit schematic diagram, chip LCD adopts present widely used HT1621 to drive, the interface of HT1621 is very simple, has only data terminal DATA, write gate end/WR and sheet choosing end/CS, and these three ports are linked 22,21,20 3 I/O mouths of single-chip microcomputer U3 respectively.Capacitor C 18 of resistance R 18, the 5 a pin serial connection of the 8th pin serial connection of its chips U4.
Figure 7 shows that the warning circuit schematic diagram, the node two ends of the 6th, 7 pin of chip U5 are serially connected with resistance R 24, capacitor C 19, the other end serial connection capacitor C 20 of capacitor C 19, node ground connection, the 2nd pin inserts on MCU the 22nd pin, the 3rd pin serial connection hummer SPEAKWR, the other end of its hummer SPEAKWR other end and the 8th, 4 pin, resistance R 24 inserts on the 1st pin of chip U6.Chip U5 and subsidiary component are formed warning circuit, and when the 3rd pin of U3 was exported high level, the 3rd pin of U5 was exported a string continuous impulse, thereby drove the hummer sounding.
The utility model in use should be noted following item:
1) this system's probe perpendicular alignmnet measured object, not mobile stadimeter when measuring;
2) having under the excessive or wet environment of noise or wind speed, measuring accuracy and scope will be adversely affected;
3) between this system's probe and the measured object barrier can not be arranged, the above angle in the minimum 5 degree angles of this system and measured object;
4) the temperature difference than overall situation in, preferably stadimeter is placed on a few minutes in the test environment before the measurement, so that obtain better precision;
5) because of this stadimeter according to the ultrasonic reflections principle, it is bigger that the velocity of sound is influenced by air ambient, mainly contains following influence:
A. humidity: its finding range is the longest under the situation of high temperature/high humidity or low temperature/low humidity.Its finding range is the shortest under the situation of low temperature/high humidity or high temperature/low humidity.
B. temperature: the instrument internal temperature is lower than per 5.5 ℃ of real air temperature, and distance increases by 1%, otherwise then reduces 1%.
Highly/air pressure: highly/the barometric pressure effect precision, 300 meters height of every approximately increase, measuring distance should deduct 0.4%, and 300 meters height of every minimizing (being counted by the sea level) measuring distance should increase by 0.4%.
Use embodiment 1
This product is placed on 15 inches computer display screen tops, with the face of ultrasonic probe in the face of the people, set alarm distance 50cm in advance, set online per remote measurement in 2 seconds once, when the human body asthenopia, when face entered alarm distance, this patent computing comparator circuit entered pre-alarm state, when continuous three times (6 seconds) when sensing correct alarm distance, alarm equipment alarm (or luminous).
Use embodiment 2
This product is fixed on hazardous equipment outside surface (as oil tank, gas tank, chemical equipment, band radioactive source equipment etc.), sets the security alarm distance, swarm into the warning distance, after continuous three remote measurements are confirmed, can send security alarm as moving target.
Use embodiment 3
Decoration company in the above range observation of 1.5m, generally needs 2 people to cooperate when doing interior decoration.Utilization this patent product, a people can finish remote sensing survey work, saves manpower, increases work efficiency.
Claims (7)
1, a kind of ultrasonic proximity range finding displaying alarm, form by ultrasonic emitting, receiving circuit, amplifying circuit, computing comparator circuit, liquid crystal display circuit, five circuit of warning circuit, it is characterized in that described ultrasonic transmit circuit (1) links to each other with ultrasound wave receiving circuit (2), ultrasound wave receiving circuit (2) links to each other with amplification comparator circuit (3), amplify comparator circuit (3) and link to each other with control compensation circuit (4), control compensation circuit (4) divides two-way to link to each other with liquid crystal display circuit (5), warning circuit (6) respectively.
2, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said ultrasonic transmit circuit comprises transmitting probe (JP1), inductance (L1), triode (Q1) composition ultrasonic transmit circuit.
3, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said ultrasound wave receiving circuit forms by receiving transducer (JP2), amplifier (U1) with (U2).
4, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said amplification comparator circuit comprises a two stage amplifer circuit.
5, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said control compensation circuit comprises one by (R19, RT1) composing environment temperature test circuit.
6, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said liquid crystal display circuit comprises a driving circuit and an interface circuit of being made up of (HT1621) of being made up of (U4).
7, a kind of ultrasonic proximity range finding displaying alarm according to claim 1 is characterized in that said warning circuit comprises that the 3rd pin by (U3) exports the warning circuit that a string continuous impulse signal drives (U5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086103 CN2741060Y (en) | 2004-10-27 | 2004-10-27 | Ultrasonic range displaying and alarming device in short distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086103 CN2741060Y (en) | 2004-10-27 | 2004-10-27 | Ultrasonic range displaying and alarming device in short distance |
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| Publication Number | Publication Date |
|---|---|
| CN2741060Y true CN2741060Y (en) | 2005-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420086103 Expired - Fee Related CN2741060Y (en) | 2004-10-27 | 2004-10-27 | Ultrasonic range displaying and alarming device in short distance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004450B (en) * | 2006-01-20 | 2010-04-14 | 刘中华 | Monitoring device and method of ultrasonic locating read-write sitting posture |
| US7741957B2 (en) | 2006-06-23 | 2010-06-22 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method for break reminder and display device using the same |
| CN102063778A (en) * | 2010-11-08 | 2011-05-18 | 华南理工大学 | Singlechip based eyesight protection warning system |
| CN105761453A (en) * | 2016-03-14 | 2016-07-13 | 汕头市奥斯卡网络科技有限公司 | Electronic device avoiding watching television at close range |
-
2004
- 2004-10-27 CN CN 200420086103 patent/CN2741060Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004450B (en) * | 2006-01-20 | 2010-04-14 | 刘中华 | Monitoring device and method of ultrasonic locating read-write sitting posture |
| US7741957B2 (en) | 2006-06-23 | 2010-06-22 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method for break reminder and display device using the same |
| CN102063778A (en) * | 2010-11-08 | 2011-05-18 | 华南理工大学 | Singlechip based eyesight protection warning system |
| CN105761453A (en) * | 2016-03-14 | 2016-07-13 | 汕头市奥斯卡网络科技有限公司 | Electronic device avoiding watching television at close range |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |