CN111957007B - Dynamometer circuit and fitness bike - Google Patents
Dynamometer circuit and fitness bike Download PDFInfo
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- CN111957007B CN111957007B CN202011003015.5A CN202011003015A CN111957007B CN 111957007 B CN111957007 B CN 111957007B CN 202011003015 A CN202011003015 A CN 202011003015A CN 111957007 B CN111957007 B CN 111957007B
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- 238000005070 sampling Methods 0.000 claims abstract description 92
- 238000001514 detection method Methods 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 23
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012549 training Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- Health & Medical Sciences (AREA)
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- Cardiology (AREA)
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Abstract
The invention discloses a dynamometer circuit which is applied to an exercise bicycle, wherein the exercise bicycle comprises a generator. In this scheme, when the body-building person uses the exercise bicycle, the process of riding can make the generator electricity generation, and the alternating current that the generator sent converts into direct current through rectifier module, and the processor passes through the first voltage signal at current sampling resistance both ends and the second voltage signal of the first end of first resistance and confirms the power value. The method can determine the amount of work done by the body-building person when the body-building vehicle is used by the body-building person through setting simple components in the circuit, reduces the cost of the body-building vehicle, and can truly realize popularization of civil supplies. The invention also discloses an exercise bicycle which has the same beneficial effects as the dynamometer circuit.
Description
Technical Field
The invention relates to the field of electronic circuits and body-building equipment, in particular to a dynamometer circuit and a body-building vehicle.
Background
Along with the remarkable improvement of the living standard of people and the enhancement of health consciousness, more and more people are put into body-building exercises, wherein the body-building vehicle is widely favored by body-building people due to the factors of simple exercise mode, obvious exercise effect, low exercise risk and the like.
When a body-building person uses the body-building vehicle to train, the training effect of the body-building person is usually evaluated through the power value calculated by the body-building vehicle, and in the prior art, the power value obtaining modes of various body-building vehicles are as follows:
Firstly, data such as torsion is collected through a torsion sensor arranged on the exercise bicycle, and then the collected data is processed through a software algorithm to obtain a power value, but the cost of the method is too high, the cost of one torsion sensor accounts for more than 50% of the whole exercise bicycle, and popularization of civil products cannot be truly realized;
Second, calories consumed by the exerciser is calculated according to the current speed, resistance level and weight of the exerciser, and a power value is calculated according to calories consumed by the exerciser and exercise time, but the power value calculated by the method is too much error compared with the actual power.
Disclosure of Invention
The invention aims to provide a dynamometer circuit and an exercise bicycle, which can determine the amount of work done by an exerciser when the exercise bicycle is used by arranging simple components in the circuit, reduce the cost of the exercise bicycle and truly realize popularization of civil products.
In order to solve the technical problems, the invention provides a dynamometer circuit, which is applied to an exercise bicycle, the exercise bicycle further comprises a generator, and the dynamometer circuit comprises:
The input end of the rectifying module is connected with the output end of the generator, and the output end of the rectifying module is grounded and is used for converting alternating current output by the generator into direct current;
The current sampling resistor is connected in series on the output loop of the rectifying module;
the input positive end is connected with the second end of the current sampling resistor module, the input negative end is connected with the first end of the current sampling resistor module, and the output end is connected with the input end of the processor;
The first end is connected with the output positive end of the rectifying module, and the second end is connected with the first end of the first resistor and the voltage dividing module;
the second end is grounded to the first resistor;
The processor is configured to determine a current sample value of the direct current flowing through the current sampling resistor based on the first voltage signal, determine a voltage sample value based on a second voltage signal at a first end of the first resistor, and determine a power value based on the current sample value and the voltage sample value.
Preferably, the current detection module includes:
The first end of the first operational amplifier resistor is connected with the second end of the current sampling resistor, and the second end of the first operational amplifier resistor is grounded;
the input positive end is connected with the first end of the first operational amplifier resistor, the input negative end is connected with the first end of the current sampling resistor, the output end is connected with the second end of the second operational amplifier resistor and the input end of the processor, and the operational amplifier is used for amplifying the first voltage signal;
and the first end of the second operational amplifier resistor is connected with the input negative end of the operational amplifier.
Preferably, the method further comprises:
The input end is connected with the second end of the current sampling resistor, the output end is connected with the first end of the first operational amplification resistor and the input positive end of the operational amplifier, and the first current limiting filter module is used for limiting the current flowing through the loop and filtering the voltage signal of the second end of the current sampling resistor;
And/or the input end is connected with the first end of the current sampling resistor, the output end is connected with the input negative end of the amplifying module and the first end of the second operational amplifying resistor, and the second current limiting filter module is used for limiting the current flowing through the loop and filtering the voltage signal of the first end of the current sampling resistor;
and/or the first protection module is connected with the output end of the operational amplifier, and the output end of the first protection module is connected with the input end of the processor, and is used for filtering the amplified first voltage signal.
Preferably, the method further comprises:
The first end of the first resistor is connected with the first end of the first resistor, and the second end of the first resistor is connected with the input end of the voltage follower;
The input end of the voltage follower is connected with the second end of the amplitude limiting module, and the output end of the voltage follower is connected with the input end of the second protection module, and the voltage follower is used for stabilizing and isolating the second voltage signal after amplitude limiting;
and/or the output end of the second protection module is connected with the input end of the processor and is used for filtering the second voltage signal after voltage stabilization and isolation.
Preferably, the method further comprises:
The input end of the speed detection module is connected with the input end of the rectification module, and the output end of the speed detection module is connected with the processor and is used for generating a speed pulse signal based on alternating current generated by the generator;
The processor is also used for judging whether the generator is in a working state or not based on the speed pulse signal.
Preferably, the speed detection module includes:
The anode is connected with the input end of the rectifying module, and the common end is used as the input end of the speed detection module, and the cathode is connected with the first end of the second resistor and used for generating pulse direct current based on the alternating current output by the generator;
the first end is connected with the cathode of the diode, and the second end is grounded to the second resistor;
the control end is connected with the first end of the second resistor, the first end is connected with the processor, and the second end is grounded;
the first end is connected with a first power supply, and the second end is connected with the first end of the first switch module and the pull-up resistor of the processor.
Preferably, the method further comprises:
The first end is connected with the positive output end of the rectifying module, and the second end is connected with the second end of the current sampling resistor, and the filtering module is used for filtering the direct current output by the rectifying module;
And the resistance adjusting module is connected with the first end of the filtering module, and the second end of the resistance adjusting module is connected with the second end of the filtering module, and is used for controlling the load to carry out corresponding resistance adjustment after receiving a resistance adjusting instruction.
Preferably, the resistance adjustment module includes:
The control end is used as an input end of the resistance adjusting module, the first end of the control end is connected with the first end of the load, and the second end of the control end is grounded, and the control end is used for controlling the current of a circuit based on the resistance adjusting instruction so that the load can perform corresponding resistance adjustment according to the current;
the first end is connected with the control end of the second switch module, and the second end is grounded;
And the positive electrode is connected with the first end of the second switch module, and the negative electrode is connected with the second end of the load and the first end of the filter module.
Preferably, the processor is further configured to, when it is determined that the generator is in an operating state, enter a step of determining a current sampling value of the direct current flowing through the current sampling resistor based on the first voltage signal, and determining a voltage sampling value based on a second voltage signal at a first end of the first resistor.
Preferably, determining the power value based on the current sample value and the voltage sample value includes:
calculating an average current value based on the current sampling value in the preset time, and calculating an average voltage value based on the voltage sampling value in the preset time;
The power value is determined based on the average voltage value and the average current value.
In order to solve the technical problems, the invention also provides an exercise bicycle, which comprises a generator and the dynamometer circuit.
The invention provides a dynamometer circuit which is applied to an exercise bicycle, and the exercise bicycle further comprises a generator. In this scheme, when the body-building person uses the exercise bicycle, the process of riding can make the generator electricity generation, and the alternating current that the generator sent converts into direct current through rectifier module, and the processor passes through the first voltage signal at current sampling resistance both ends and the second voltage signal of the first end of first resistance and confirms the power value. The method can determine the amount of work done by the body-building person when the body-building vehicle is used by the body-building person through setting simple components in the circuit, reduces the cost of the body-building vehicle, and can truly realize popularization of civil supplies.
The invention also provides an exercise bicycle which has the same beneficial effects as the dynamometer circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a power circuit according to the present invention;
FIG. 2 is a flow chart of a process of a processor in a dynamometer circuit according to the present invention;
Fig. 3 is a schematic circuit diagram of another power measurement circuit according to the present invention.
Detailed Description
The invention has the core of providing a dynamometer circuit and an exercise bicycle, which can determine the amount of work done by an exerciser when using the exercise bicycle through arranging simple components in the circuit, reduce the cost of the exercise bicycle and truly realize popularization of civil products.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic circuit diagram of a power measurement circuit according to the present invention, and fig. 2 is a process flow chart of a processor in the power measurement circuit according to the present invention.
The dynamometer circuit is applied to the exercise bicycle, and the exercise bicycle still includes the generator, and the dynamometer circuit includes:
the input end of the rectifying module 1 is connected with the output end of the generator, and the output negative end of the rectifying module is grounded and is used for converting alternating current output by the generator into direct current;
The current sampling resistor 2 is connected in series on the output loop of the rectifying module 1;
the input positive end is connected with the second end of the current sampling resistor 2 module, the input negative end is connected with the first end of the current sampling resistor 2 module, and the output end is connected with the input end of the processor 5, and the current detection module 3 is used for detecting first voltage signals at two ends of the current sampling resistor 2;
the voltage dividing module 4 is connected with the positive output end of the rectifying module 1 at the first end, and connected with the first end of the first resistor R1 and the processor 5 at the second end;
a first resistor R1 with a second end grounded;
A processor 5, configured to implement steps S21 and S22;
s21, determining a current sampling value of direct current flowing through the current sampling resistor 2 based on the first voltage signal, and determining a voltage sampling value based on a second voltage signal of the first end of the first resistor R1;
and S22, determining a power value based on the current sampling value and the voltage sampling value.
The applicant considers that when the exercise bicycle is used for training, the exercise bicycle is usually used for evaluating the training effect of the exercise bicycle through the power value calculated by the exercise bicycle, in the prior art, various exercise bicycle obtain the power value by collecting data such as torsion through a torsion sensor arranged on the exercise bicycle, and then processing the collected data through a software algorithm, so as to obtain the power value or calculate the power value according to the current speed, the resistance level and the weight of the exercise bicycle. However, the cost of the method for setting the torsion sensor is too high, the cost of one torsion sensor accounts for more than 50% of the whole body of the exercise bicycle, the popularization of civil supplies cannot be truly realized, and the error between the power value calculated by the method for calculating the power value according to the current speed, the resistance level and the weight of the exercise bicycle and the actual power is too large.
In this embodiment, a dynamometer circuit is disposed in the exercise bicycle, and includes a rectifying module 1, a current sampling resistor 2, a current detecting module 3, a voltage dividing module 4, a processor 5, and the like. When a body-building person uses the body-building bicycle, the pedal of the body-building bicycle is acted, so that the generator inside the body-building bicycle generates electricity, and the alternating current generated by the generator is converted into direct current through the rectifying module 1 to supply power for the whole circuit. The processor 5 determines a current sampling value of the direct current flowing through the current sampling resistor 2 according to the first voltage signal at two ends of the current sampling resistor 2, determines a voltage sampling value of the point according to the second voltage signal between the first resistor R1 and the voltage dividing module 4, and then calculates a power value according to the current sampling value and the voltage sampling value.
Although the generator and the rectifying module 1 are connected by the VH3.96 socket, the generator and the rectifying module 1 are not limited to the connection by the VH3.96 socket, and the specific mode and the specific device to be used for connection are not particularly limited herein.
The rectification module 1 is a three-phase full-wave rectification circuit, but the rectification module 1 is not limited to a three-phase full-wave rectification circuit, and the present application is not particularly limited to the specific arrangement of the rectification module 1.
In addition, considering that the internal space of the exercise bicycle is limited, the current sampling resistor 2 is usually configured as three resistors of 0.5R connected in parallel, and if a resistor of the same power is configured to be connected in parallel with the three resistors of 0.5R, the resistor volume will be large. However, the current sampling resistor 2 is not limited to three resistors of 0.5R connected in parallel, and the present application is not particularly limited to the specific arrangement of the current sampling resistor 2.
It should be noted that, here, the current detection module 3 generally includes a voltage amplifier, and the first voltage signals at both ends of the current sampling resistor 2 are amplified by the voltage amplifier, so that the processor 5 calculates the current sampling value from the amplified first voltage signals, but the amplifying of the first voltage signals at both ends of the current sampling resistor 2 is not limited to be implemented by the voltage amplifier, and the present application is not limited thereto.
In order to obtain a suitable second voltage signal, the voltage dividing module 4 is usually three 270kΩ resistors connected in series, but the voltage dividing module 4 is not limited to three 270kΩ resistors connected in series, and the specific arrangement of the voltage dividing module 4 is not particularly limited herein.
In summary, the method can determine the amount of work done by the body-building person when the body-building vehicle is used by the body-building person through arranging simple components in the circuit, reduces the cost of the body-building vehicle, and can truly realize popularization of civil supplies, and when the body-building person uses the body-building vehicle to ride, the processor 5 calculates the average power value by detecting the current and the voltage generated by the generator, and compared with the actual work done by the body-building person, the method has small error and high precision of measuring the power.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of another power measuring circuit according to the present invention.
Based on the above embodiments:
As a preferred embodiment, the current detection module 3 includes:
The first end is connected with the second end of the current sampling resistor 2, and the second end is grounded to the first operational amplification resistor R2;
An operational amplifier 31 with an input positive end connected with the first end of the first operational amplifier resistor R2, an input negative end connected with the first end of the current sampling resistor 2, an output end connected with the second end of the second operational amplifier resistor R3 and the input end of the processor 5, for amplifying the first voltage signal;
a second operational amplifier resistor R3 having a first end connected to the negative input terminal of the operational amplifier 31.
In order to adjust the first voltage signal to the data range of the processor 5 for the processor 5, in this embodiment, the current detection module 3 specifically includes a first operational amplifier resistor R2, a second operational amplifier resistor R3, and an operational amplifier 31, and the processor 5 determines a current sampling value of the direct current flowing through the current sampling resistor 2 according to the first voltage signal amplified by the operational amplifier 31.
Here, the first operational amplifier resistor R2 and the second operational amplifier resistor R3 are generally set to be 100kΩ, and when the first operational amplifier resistor R2 and the second operational amplifier resistor R3 are both 100kΩ, the amplification factor of the operational amplifier 31 is 100, for example, when the voltage across the current sampling resistor 2 is 2V, the voltage output from the output terminal of the operational amplifier 31 after amplification is 200V.
Of course, the first operational amplifier resistor R2 and the second operational amplifier resistor R3 are not limited to 100kΩ, and are specifically set according to the actual required amplification factor of the second voltage signal, and the present application is not limited thereto.
In addition, the operational amplifier 31 is generally set as LM358, where the input positive terminal of the operational amplifier 31 is3 pins of LM358, the input negative terminal is2 pins of LM358, and the output terminal is 1 pin of LM358, and the operational amplifier LM358 is connected to a 5V power supply through 8 pins and is grounded through 4 pins to supply power to itself.
Of course, the operational amplifier 31 is not limited to the LM358, and the present application is not particularly limited herein with respect to the specific model of the operational amplifier 31.
As a preferred embodiment, further comprising:
The first current limiting filter module 32, the input end of which is connected with the second end of the current sampling resistor 2, the output end of which is connected with the first end of the first operational amplifier resistor R2 and the input positive end of the operational amplifier 31, is used for limiting the current flowing through the loop and filtering the voltage signal of the second end of the current sampling resistor 2;
And/or, the input end is connected with the first end of the current sampling resistor 2, the output end is connected with the input negative end of the amplifying module and the first end of the second operational amplifying resistor R3, and the second current limiting filter module 33 is used for limiting the current flowing through the loop and filtering the voltage signal of the first end of the current sampling resistor 2;
And/or, a first protection module 34 with an input end connected to the output end of the operational amplifier 31 and an output end connected to the input end of the processor 5 is used for filtering the amplified first voltage signal.
In order to make the first voltage signal acquired by the current detection module 3 more accurate, the current sampling value obtained by the processor 5 based on the first voltage signal is further accurate. In this embodiment, a first current limiting filter module 32 is disposed at the input positive terminal of the operational amplifier 31, and/or a second current limiting filter module 33 is disposed at the input negative terminal of the operational amplifier 31, and/or a first protection module 34 is disposed at the output terminal of the operational amplifier 31. The first voltage signal acquired by the current detection module 3 can be more accurate, and the current sampling value obtained by the processor 5 based on the first voltage signal is more accurate.
It should be noted that, the first current limiting filter module 32 herein generally includes a first current limiting resistor having a first end connected to the second end of the current sampling resistor 2, a first signal input resistor having a second end connected to the first end of the first signal input resistor and the first end of the first filter capacitor, a first filter capacitor having a second end grounded, a first signal input resistor having a first end connected to the second end of the first current limiting resistor and the first end of the first filter capacitor, and a second end connected to the input positive terminal of the operational amplifier 31.
Of course, the design of the first current limiting filter module 32 is not limited to the above-mentioned manner, and the present application is not limited thereto.
The second current limiting filter module 33 here generally includes a second current limiting resistor having a first end connected to the first end of the current sampling resistor 2, a second end connected to the first end of the second signal input resistor and the first end of the second filter capacitor, and a second filter capacitor having a second end grounded, wherein the first end is connected to the first end of the second filter module 10, and the second end is connected to the negative input end of the operational amplifier 31 and the first end of the second operational amplifier resistor R3.
Of course, the design of the second current limiting filter module 33 is not limited to the above-mentioned manner, and the present application is not limited thereto.
The first protection module 34 generally includes a third current limiting resistor having a first end connected to the output terminal of the operational amplifier 31, a third filter capacitor having a second end connected to the second end of the third current limiting resistor, and a second end grounded, a fourth current limiting resistor having a first end connected to the first end of the third filter capacitor, a second end connected to the input terminal of the processor 5, a second diode having an anode connected to the second end of the fourth current limiting resistor, a cathode connected to the second end of the 5V power supply, and a third diode having a cathode connected to the second end of the fourth current limiting resistor and an anode grounded.
Of course, the design of the first protection module 34 is not limited to the above-described manner, and the present application is not limited thereto.
As a preferred embodiment, further comprising:
The limiting module 6 is connected with the first end of the first resistor R1 at the first end and the input end of the voltage follower 7 at the second end, and is used for limiting the second voltage signal;
The input end of the voltage follower 7 is connected with the second end of the amplitude limiting module 6, and the output end of the voltage follower is connected with the input end of the second protection module 8, and the voltage follower is used for stabilizing and isolating the second voltage signal after amplitude limiting;
and/or the output end of the second protection module 8 is connected with the input end of the processor 5, and is used for filtering the second voltage signal after voltage stabilization and isolation.
In order to make the second voltage signal obtained by the processor 5 more accurate, the voltage sample value obtained by the processor 5 based on the second voltage signal is further accurate. In this embodiment, an amplitude limiting module 6, a voltage follower 7 and a second protection module 8 are added, the amplitude limiting module 6 limits the amplitude of the second voltage signal, then the voltage follower 7 stabilizes and isolates the limited second voltage signal, finally the second protection module 8 filters the stabilized and isolated second voltage signal, and the processor 5 determines a voltage sampling value based on the filtered second voltage signal. This way, the second voltage signal obtained by the processor 5 can be more accurate, and the voltage sampling value obtained by the processor 5 based on the second voltage signal can be more accurate.
The clipping module 6 here generally includes a fifth current limiting resistor having a first end connected to the first end of the first resistor R1, a fourth filter capacitor having a second end connected to the second end of the fifth current limiting resistor, and a fourth filter capacitor having an anode connected to the first end of the fourth filter capacitor and the input positive end of the voltage follower 7, a fourth diode having a cathode connected to the input negative end of the voltage follower 7, and a fourth diode having an anode connected to the input negative end of the voltage follower 7 and a cathode connected to the input positive end of the voltage follower 7.
Of course, the design of the clipping module 6 is not limited to the above-described mode, and the present application is not limited thereto.
It should be noted that the second protection module 8 generally includes a sixth current limiting resistor having a first end connected to the output terminal of the voltage follower 7, a fifth filter capacitor having a first end connected to the second end of the sixth current limiting resistor and a second end grounded, a sixth diode having an anode connected to the second end of the sixth current limiting resistor and a cathode connected to the 5V power supply, and a seventh diode having a cathode connected to the second end of the sixth current limiting resistor and an anode grounded.
Of course, the design of the second protection module 8 is not limited to the above-described mode, and the present application is not limited thereto.
In addition, the voltage follower 7 is usually LM358 here, where the input positive terminal of the voltage follower 7 is 5 pins of LM358, the input negative terminal is 6 pins of LM358, and the output terminal is 7 pins of LM358, and the voltage follower LM358 is connected to a 5V power supply through 8 pins and is grounded through 4 pins to supply power to itself.
Of course, the voltage follower 7 is not limited to the LM358, and the present application is not particularly limited thereto.
As a preferred embodiment, further comprising:
The speed detection module 9 is connected with the input end of the rectification module 1 and the output end of the speed detection module is connected with the processor 5, and is used for generating a speed pulse signal based on alternating current generated by the generator;
the processor 5 is further configured to determine whether the generator is in an operating state based on the speed pulse signal.
In order for the processor 5 to be able to know whether an exercise machine is being used by an exerciser, i.e. whether a generator in the exercise machine is running. In this embodiment, a speed detection module 9 is provided, the speed detection module 9 can generate a speed pulse signal according to ac power generated by the generator, when the processor 5 detects the speed pulse signal, it is determined that the generator is in a working state, that is, an exercise bicycle is being used by an exercise bicycle at the moment, and when the processor 5 does not detect the speed pulse signal, it is determined that the generator is not in a working state, that is, the exercise bicycle is not being used by the exercise bicycle.
As a preferred embodiment, the speed detection module 9 comprises:
the anode is connected with the input end of the rectifying module 1, and the common end is used as the input end of the speed detection module 9, and the cathode is connected with the first end of the second resistor and used for generating pulse direct current based on the alternating current output by the generator;
a second resistor with a first end connected with the cathode of the diode and a second end grounded;
The control end is connected with the first end of the second resistor, the first end is connected with the processor 5, and the second end is grounded;
The first end is connected with the first power supply, and the second end is connected with the first end of the first switch module and the pull-up resistor of the processor 5.
On the basis of the above-described embodiment, this embodiment proposes an implementation of the speed detection module 9. In this embodiment, when the exercise bicycle is being used by the user, the generator generates alternating current, the diode is turned on when the alternating current voltage generated by the generator is positive, the first switch module is turned on, the first end voltage of the first switch module is pulled down to ground, and when the alternating current voltage generated by the generator is negative, the diode is turned off, the first switch module is turned off, and the first end voltage of the first switch module is pulled up by the pull-up resistor. It can be seen that the processor 5 can detect a speed pulse signal by this process.
It should be noted that, in order to avoid that the first switch module is turned on by mistake due to the different interference signals, in this embodiment, a second resistor is provided, one end of which is connected to the control end of the first switch module, and the other end of which is grounded, and when no exercise person uses the exercise bicycle, the second resistor pulls down the control end of the first switch module to the ground, so that the first switch module can keep the off state all the time.
In addition, the first switch module is an NPN (Negative-Positive-Negative) transistor, but the first switch module is not limited to an NPN transistor, and the present application is not limited thereto.
As a preferred embodiment, further comprising:
the first end of the filtering module 10 is connected with the positive output end of the rectifying module 1, and the second end of the filtering module is connected with the second end of the current sampling resistor 2, and is used for filtering direct current output by the rectifying module 1;
And the resistance adjusting module 11 is connected with the first end of the filtering module 10 at a first end and connected with the second end of the filtering module 10 at a second end, and is used for controlling the load to perform corresponding resistance adjustment after receiving a resistance adjusting instruction.
In order to make the exercise bicycle more humanized, in this embodiment, a filtering module 10 and a resistance adjusting module 11 are provided, the alternating current generated by the generator is converted into direct current through a rectifying module 1, the direct current enters a resistance adjusting loop after being filtered by the filtering module 10, and an exerciser can adjust the resistance of the pedal of the exercise bicycle in a manual knob mode, so as to achieve different exercise effects.
It should be noted that, the filtering module 10 generally includes two capacitors connected in parallel, which are used to filter out the high-frequency component and the low-frequency component in the clutter, and the present application is not limited in particular to the specific type of the capacitors.
As a preferred embodiment, the resistance adjustment module 11 includes:
The control end is used as an input end of the resistance adjusting module 11, the first end of the control end is connected with the first end of the load, and the second end of the control end is grounded;
The first end is connected with the control end of the second switch module, and the second end is grounded to a third resistor;
And the positive electrode is connected with the first end of the second switch module, the negative electrode is connected with the second end of the load and the first end of the filter module 10.
On the basis of the above-described embodiments, this embodiment proposes an implementation of the resistance adjustment module 11. In this embodiment, when the resistance is increased by the exerciser through a manual knob or the like, the duty ratio of the pulse input from the input end of the adjusting module is increased, so that the conduction angle of the second switch module is increased, and the output current of the second switch module is increased, and the load is correspondingly adjusted according to the magnitude of the current.
In order to avoid that the second switch module is turned on by mistake due to the different interference signals, in this embodiment, a third resistor is provided, one end of which is connected to the control end of the second switch module, and the other end of which is grounded, and when the input end of the resistance adjustment module 11 has no pulse current, the third resistor pulls down the control end of the second switch module to the ground, so that the second switch module can keep the off state all the time.
In addition, the load here generally refers to a pedal in an exercise bicycle, and an electromagnet is generally disposed in the pedal, so that when an exerciser increases the resistance by means of a manual knob or the like, the duty ratio of the pulse current input from the input end of the resistance adjustment module 11 increases, the conduction angle of the second switch module increases, and the output current of the second switch module further increases, and when the current input to the load increases, the magnetic force of the electromagnet increases, thereby achieving the effect of increasing the resistance of the pedal in the exercise bicycle.
As a preferred embodiment, the processor 5 is further configured to enter the step S21 based on determining that the generator is in operation.
Considering whether the generator of the exercise bicycle is in a working state or not through the speed pulse signal, namely whether an exercise bicycle is being used by an exerciser or not can be judged through the speed pulse signal. In this embodiment, the processor 5 determines whether the speed detection module 9 detects the speed pulse signal, if so, it goes to a step of determining a current sampling value of the direct current flowing through the current sampling resistor 2 based on the first voltage signal, a step of determining a voltage sampling value based on the second voltage signal at the first end of the first resistor R1, and a step of determining a power value based on the current sampling value and the voltage sampling value, and if the processor 5 does not detect the speed pulse signal, it saves the current sampling value and the voltage sampling value, and returns to the step of the processor 5 determining whether the speed detection module 9 detects the speed pulse signal.
As a preferred embodiment, determining the power value based on the current sample value and the voltage sample value includes:
s221, calculating an average current value based on current sampling values in preset time, and calculating an average voltage value based on voltage sampling values in preset time;
And S222, determining a power value based on the average voltage value and the average current value.
In this embodiment, the power value is determined based on the current sampling value and the voltage sampling value, specifically, the average current value is calculated from the current sampling value within the preset time, the average voltage value is calculated from the voltage sampling value within the preset time, and then the power value is determined from the average voltage value and the average current value.
The invention also provides an exercise bicycle, which comprises a generator and the dynamometer circuit.
For the description of the exercise bicycle provided by the present invention, refer to the above embodiment of the present invention, and the description of the present invention is omitted herein.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Claims (10)
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| CN212789596U (en) * | 2020-09-22 | 2021-03-26 | 青岛英派斯健康科技股份有限公司 | Dynamometer circuit and exercise bicycle |
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| EP1059102A4 (en) * | 1998-02-26 | 2005-01-19 | Omron Healthcare Co Ltd | Exercise machine, physical strength evaluating method, and pulsation meter |
| CN101322874B (en) * | 2008-07-15 | 2010-08-18 | 北京金秋果实电子科技有限公司 | Intelligent training machine and control circuit thereof |
| CN201543166U (en) * | 2009-09-17 | 2010-08-11 | 杨海涛 | Force feedback apparatus of moment type motion |
| CN204193389U (en) * | 2014-03-06 | 2015-03-11 | 李雄昆 | A kind of drag regulator of Spinning |
| CN107812350A (en) * | 2016-09-14 | 2018-03-20 | 乔山健康科技(上海)有限公司 | The sports equipment that measurable user contributes |
| CN107837497A (en) * | 2017-12-08 | 2018-03-27 | 珠海奥释科技有限公司 | The power generation exercise bicycle system for bearing a heavy burden controllable, adjust the method and control system of heavy burden |
| EP3773942A1 (en) * | 2018-04-08 | 2021-02-17 | Kompan A/S | Exercise machine with a variable load provided by an electric motor |
| GB201810397D0 (en) * | 2018-06-25 | 2018-08-08 | Wattbike Ip Ltd | Method and apparartus for monitoring user effectivness during operation of an exercise machine |
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