CN220948343U - Toppling detection circuit applied to electric pedal vehicle - Google Patents
Toppling detection circuit applied to electric pedal vehicle Download PDFInfo
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- CN220948343U CN220948343U CN202322781292.4U CN202322781292U CN220948343U CN 220948343 U CN220948343 U CN 220948343U CN 202322781292 U CN202322781292 U CN 202322781292U CN 220948343 U CN220948343 U CN 220948343U
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 10
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- 238000006243 chemical reaction Methods 0.000 claims description 7
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Abstract
The utility model belongs to the field of electric treadmills, and discloses a toppling detection circuit applied to an electric treadmill, wherein the electric treadmill is provided with an in-wheel motor, and the toppling detection circuit applied to the electric treadmill comprises a controller, a moment/pedal frequency sensor and central control equipment, wherein the controller, the moment/pedal frequency sensor and the central control equipment are arranged on the electric treadmill; the controller comprises a main control chip, a motor driving circuit, a motor feedback circuit, a Hall sensor and a three-axis sensor, wherein the torque/treading frequency sensor is arranged at the five-way position of the electric pedal vehicle, the torque/treading frequency sensor is connected with the main control chip, the motor driving circuit is connected between the main control chip and the wheel hub motor, the motor feedback circuit is connected with the main control chip by the output end of the motor driving circuit, the Hall sensor is connected between the main control chip and the wheel hub motor, the three-axis sensor is connected with the main control chip, the main control chip is connected with the central control equipment, and the central control equipment is in wireless connection with the operation platform. The utility model can realize the toppling detection of the electric pedal vehicle and improve the power-assisted control of the electric pedal vehicle.
Description
Technical Field
The utility model belongs to the field of electric treadmills, and particularly relates to a toppling detection circuit applied to an electric treadmill.
Background
The electric pedal vehicle is a personal vehicle which not only has the light weight and portability of the bicycle, but also can compensate the burden feeling of the bicycle when ascending a slope and upwind. The electric pedal vehicle is similar to a bicycle in appearance, is provided with a power system taking a sensor as a core, and is provided with a motor and a battery.
However, current electric treadmills cannot detect the current posture in real time because of the lack of a toppling detection circuit. Resulting in the following disadvantages: 1. when a user falls down in the riding process, the user cannot recognize the falling phenomenon at the first time; 2. in a standard parking zone, the vehicle can not be identified at the first time, so that the appearance of urban street is affected.
Disclosure of utility model
The utility model aims to provide a toppling detection circuit applied to an electric pedal vehicle, which realizes toppling detection of the electric pedal vehicle and improves power-assisted control of the electric pedal vehicle.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
A toppling detection circuit for an electric treadmill, the electric treadmill having an in-wheel motor, the toppling detection circuit for an electric treadmill comprising a controller mounted on the electric treadmill, a torque/tread frequency sensor and a central control device;
The controller comprises a main control chip, a motor driving circuit, a motor feedback circuit, a Hall sensor and a triaxial sensor, wherein the moment/frequency sensor is arranged at the five-way position of the electric pedal vehicle, the moment/frequency sensor is connected with the main control chip, the motor driving circuit is connected between the main control chip and a hub motor, the output end of the motor feedback circuit is connected to the main control chip, the Hall sensor is connected between the main control chip and the hub motor, the triaxial sensor is connected with the main control chip, the main control chip is connected with central control equipment, and the central control equipment is in wireless connection with an operation platform.
The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.
Preferably, the toppling detection circuit applied to the electric pedal vehicle further comprises a light display, and the light display is connected with the main control chip.
Preferably, the light display includes a front running light mounted at a front end of the electric treadmill and a rear running light mounted at a rear end of the electric treadmill.
Preferably, the toppling detection circuit applied to the electric pedal vehicle further comprises an overspeed alarm, and the overspeed alarm is connected with the main control chip.
Preferably, the overspeed alarm is an audible alarm, a light alarm or an audible and visual alarm.
Preferably, the controller further comprises a lithium battery and a power conversion circuit, wherein the power conversion circuit comprises a two-way buck DCDC circuit and a two-way LDO circuit;
The input end of the first path of step-down DCDC circuit is connected with the lithium battery, the output end of the first path of step-down DCDC circuit is respectively connected with the second path of step-down DCDC circuit and the motor driving circuit, the output end of the second path of step-down DCDC circuit is respectively connected with the two paths of LDO circuits and the moment/step-on frequency sensor, the output end of the first path of LDO circuit is respectively connected with the central control equipment and the three-axis sensor, and the output end of the second path of LDO circuit is respectively connected with the main control chip and the motor feedback circuit.
Preferably, the LDO circuit comprises an LDO chip, a magnetic bead F2, a capacitor C644, a capacitor C645 and a capacitor C15;
The first pin of LDO chip is connected with one end of magnetic bead F2, and the other end of magnetic bead F2 is connected with the output of second way step-down DCDC circuit, the one end of electric capacity C645 is connected with the first pin of LDO chip, the other end ground connection of electric capacity C645, the first pin of LDO chip is connected with the third pin of LDO chip, the second pin ground connection of LDO chip, the output of LDO circuit is regarded as to the fifth pin of LDO chip, the fifth pin ground connection of LDO chip passes through electric capacity C644, the fifth pin ground connection of LDO chip passes through electric capacity C15, the fourth pin unsettled of LDO chip.
Preferably, the number of the triaxial sensors is one or more.
Preferably, SPI communication is adopted between the triaxial sensor and the main control chip.
Compared with the prior art, the toppling detection circuit applied to the electric pedal vehicle has the following beneficial effects:
1. When the user falls down in the riding process, the falling down phenomenon can be identified through the three-axis sensor at the first time, and the falling down phenomenon is fed back to the operation platform through the central control equipment, so that the operator can dial a user telephone in time to inquire whether rescue is needed or not, and the accident worsening risk is reduced.
2. In the normal parking zone, the phenomenon of vehicle dumping is identified at the first time through the three-axis sensor, the dumping phenomenon is fed back to the operation platform through the central control equipment, operators can arrive at the site in time to process, and the urban street appearance is improved.
3. The torque/pedal frequency feedback information of the electric pedal is collected through the torque/pedal frequency sensor and is used for improving the power assisting effect of the electric pedal.
4. The motor driving circuit and the motor feedback circuit realize feedback control so as to improve the control effect on the hub motor.
Drawings
FIG. 1 is a block diagram of a toppling detection circuit for an electric bicycle according to the present utility model;
Fig. 2 is a schematic diagram of an LDO circuit according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
In order to overcome the defects of the existing electric pedal vehicle, the embodiment provides a toppling detection circuit applied to the electric pedal vehicle, which can realize toppling detection of a private electric pedal vehicle or a shared electric pedal vehicle so as to take effective measures in time. In which the electric bicycle has a conventional structure of a frame, a chain, a booster, an in-wheel motor, etc., the present embodiment focuses on providing a toppling detecting circuit, and thus a detailed description of the conventional structure of the electric bicycle will not be given.
As shown in fig. 1, the toppling detection circuit of the present embodiment applied to an electric bicycle includes a controller, a torque/tread frequency sensor, and a center control device mounted on the electric bicycle.
The controller comprises a main control chip, a motor driving circuit, a motor feedback circuit, a Hall sensor and a triaxial sensor. Of course, in order to ensure the normal operation of the controller, the controller should further include a power supply module, and the power supply module in this embodiment is a lithium battery and a power conversion circuit.
(1) A main control chip (MCU).
The main control chip of the embodiment adopts MicroChip dsPIC33CK series, industrial-level chips, the working voltage is 3.3V, the temperature range is-40-85 DEG, and the highest clock is 100MHz.
The main control chip is mainly used for collecting data and outputting corresponding control signals according to the collected data, so that in other embodiments, the signals of the main control chip can be replaced and selected according to requirements.
(2) Torque/pedal frequency sensor.
The torque/pedal frequency sensor is arranged at the five-way position of the electric pedal vehicle and is connected with the main control chip, and the torque/pedal frequency sensor is used for acquiring the torque and pedal frequency of the electric pedal vehicle and feeding back the torque and pedal frequency to the main control chip. In order to save equipment, the embodiment adopts an integrated moment/treading frequency sensor, and in other embodiments, the moment sensor and the treading frequency sensor can be respectively arranged at the five-way position of the electric pedal vehicle.
(3) And a motor driving circuit.
The motor driving circuit is connected between the main control chip and the hub motor and is used for driving the hub motor according to a control signal of the main control chip. The motor driving circuit of this embodiment adopts Shao Feng technology driving chip FD2103, and the working voltage of the driving chip is 15V. Since the hub motor of the electric bicycle is a three-phase brushless direct current motor, three driving chips FD2103 are needed, and each driving chip FD2103 is respectively connected with one phase of the three-phase brushless direct current motor for independently driving the three-phase brushless direct current motor.
(4) And a motor feedback circuit.
The data collected by the motor feedback circuit comprises feedback current of each phase, bus feedback current and opposite feed voltage value of the three-phase brushless direct current motor, the data is fed back to the main control chip, and the duty ratio of the MCU to motor driving is regulated and controlled through real-time monitoring, so that the motor control effect is achieved.
The motor feedback circuit comprises four paths of current feedback circuits and three paths of voltage feedback circuits, wherein the four paths of current feedback circuits are respectively connected with three phase lines and buses of the three-phase brushless direct current motor, and the three paths of voltage feedback circuits are respectively connected with the three phase lines of the three-phase brushless direct current motor.
The current feedback circuit is led out from the corresponding driving end of the motor driving circuit, firstly converts a current signal into a voltage signal through an alloy resistor, then amplifies the voltage signal through a differential operational amplification circuit, detects the amplified voltage signal through an ADC pin of the MCU, and converts the detected voltage signal to obtain a current value. The differential operational amplifier circuit is realized by adopting the existing circuit principle, for example, the differential operational amplifier circuit is realized by an NCV20034 chip.
The voltage feedback circuit is led out from the corresponding driving end of the motor driving circuit, reduces the voltage in a resistor series voltage division mode, detects the reduced voltage signal through an ADC pin of the MCU, and converts the voltage value according to the detected voltage signal.
The embodiment realizes the feedback control of the hub motor through the motor driving circuit and the motor feedback circuit, and improves the control effect of the hub motor. In addition, the main control chip can also realize the regulation and control of the hub motor according to the collected moment and the pedal frequency value, and the power assisting effect of the electric pedal vehicle is improved. The present embodiment focuses on providing a hardware platform, and how to implement feedback control or regulation control of an in-wheel motor is not important as protection of the present application, and therefore will not be described in detail.
(5) A three-axis sensor.
The three-axis sensor can be one or more, and is preferably arranged at the front part of the electric pedal vehicle when the three-axis sensor is one, and the toppling detection is realized through the three-axis sensor; when the three-axis sensors are multiple, the three-axis sensors can be distributed at multiple positions at the front end and the rear end of the electric pedal vehicle, and the toppling detection is realized by integrating the measured values of the three-axis sensors, so that the toppling detection accuracy of the electric pedal vehicle is improved.
In the embodiment, the triaxial sensor adopts a chip LIS3DHTR, is connected with the main control chip in an SPI communication mode, acquires triaxial acceleration data in real time through the main control chip MCU, invokes an attitude resolving algorithm, and solves a Z-axis angle to realize dumping detection.
For an electric treadmill, it is possible that a turn is made during running in a normal range of inclination, and it is also possible that a toppling in an abnormal range of inclination occurs. Therefore, the main control chip judges the state of the electric pedal according to the calculated angle. For example, the dumping threshold value is set to 45 °, and the vehicle is determined to turn when the calculated angle is smaller than 45 °, and the vehicle is determined to be dumped when the calculated angle is greater than or equal to 45 °. It should be noted that, how to judge the state of the treadmill is designed according to the actual situation, only one possible scheme is provided in this embodiment.
Further, the toppling detection circuit of this embodiment further includes a light display, and the light display is connected with the main control chip, and the main control chip is according to the state control light display switching different display states of electric treadmill. For example, when the electric bicycle runs normally and vertically, the light display is controlled to be in a turned-off state; when the electric pedal vehicle turns, the light display on the corresponding side can be controlled to flash; when the electric pedal vehicle is in a toppling state, all the light displays can be controlled to flash.
Wherein the light display comprises a front running light arranged at the front end of the electric pedal vehicle and a rear running light arranged at the rear end of the electric pedal vehicle. The driving lamp comprises a steering lamp, an illuminating lamp, a contour lamp, a warning lamp and the like.
(6) Hall sensor.
The Hall sensor is connected between the main control chip and the hub motor, the Hall sensor sends generated pulses to the main control chip, and the main control chip obtains the running speed of the electric pedal vehicle according to the pulses, and the running speed can be used for realizing control or warning lamps.
For example, in another embodiment, the dumping detection circuit further comprises an overspeed alarm, and the overspeed alarm is connected with the main control chip, and when the main control chip detects that the running speed exceeds the overspeed (for example, when the running speed of the electric pedal is equal to or greater than 15 km/h), the overspeed alarm is controlled to give an alarm to prompt a rider to slow down. The overspeed alarm is an audible alarm, a light alarm or an audible and visual alarm, and can be selected according to the requirement.
(7) And the central control equipment.
In order to feed back the state (mainly the toppling state) of the electric pedal to the operation platform (also referred to as a monitoring end), the main control chip of the embodiment is connected with the central control device, and the central control device is wirelessly connected with the operation platform.
The central control equipment is intelligent central control and is a complete component, the model number of the central control equipment is WD325, and the central control equipment comprises functions of GPS positioning, 4G communication, bluetooth communication, 485 communication and the like. When the controller detects that the vehicle is toppled, the vehicle state information is sent to the intelligent central control through the 485 interface, the intelligent central control is transmitted back to the operation platform through the 4G communication network, and an operator can respond to the relevant processing mechanism through the platform alarm and the quick response.
(8) Lithium battery and power conversion circuit.
The power conversion circuit of the embodiment comprises a two-way buck DCDC circuit and a two-way LDO circuit.
The input end of the first-path step-down DCDC circuit is connected with the lithium battery, the output end of the first-path step-down DCDC circuit is respectively connected with the second-path step-down DCDC circuit and the motor driving circuit for supplying power, the first-path step-down DCDC circuit adopts a chip EG1192L for converting the voltage of the lithium battery into DC15V, the wide input voltage range is 10V-100V, and the lithium battery is compatible with different voltage types of lithium batteries below 64V.
The second step-down type DCDC circuit adopts a chip SCT2332 to convert DC15V into 5V, and the output end of the second step-down type DCDC circuit is respectively connected with the two LDO circuits and the moment/step-down frequency sensor for power supply.
The chips adopted by the two paths of LDO circuits are TLV75533, and because remote alarm is needed after dumping detection, the output end of the first path of LDO circuit is respectively connected with the central control equipment and the three-axis sensor, and the output end of the second path of LDO circuit is respectively connected with the main control chip, the motor feedback circuit, the overspeed alarm and the light display.
As shown in fig. 2, the LDO circuit of the present embodiment includes an LDO chip, a magnetic bead F2, a capacitor C644, a capacitor C645, and a capacitor C15.
The first pin of LDO chip is connected with one end of magnetic bead F2, and the other end of magnetic bead F2 is connected with the output of second way step-down DCDC circuit, and the one end of electric capacity C645 is connected with the first pin of LDO chip, and the other end ground connection of electric capacity C645, the first pin of LDO chip is connected with the third pin of LDO chip, and the second pin ground connection of LDO chip, the fifth pin of LDO chip regard as the output of LDO circuit, and the fifth pin ground connection of LDO chip passes through electric capacity C644, and the fifth pin ground connection of LDO chip passes through electric capacity C15, and the fourth pin of LDO chip is unsettled.
In the LDO circuit, voltage input is filtered through a magnetic bead F2, and high-frequency interference of the circuit is filtered. The capacitor C645 is an input voltage filter capacitor, and improves the stability of the voltage entering the LDO chip. The capacitor C644 and the capacitor C15 are output voltage filter capacitors, and the quality of output voltage is improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.
Claims (9)
1. A toppling detection circuit for an electric treadmill, the electric treadmill having an in-wheel motor, the toppling detection circuit comprising a controller mounted on the electric treadmill, a torque/tread frequency sensor and a central control device;
The controller comprises a main control chip, a motor driving circuit, a motor feedback circuit, a Hall sensor and a triaxial sensor, wherein the moment/frequency sensor is arranged at the five-way position of the electric pedal vehicle, the moment/frequency sensor is connected with the main control chip, the motor driving circuit is connected between the main control chip and a hub motor, the output end of the motor feedback circuit is connected to the main control chip, the Hall sensor is connected between the main control chip and the hub motor, the triaxial sensor is connected with the main control chip, the main control chip is connected with central control equipment, and the central control equipment is in wireless connection with an operation platform.
2. The toppling detection circuit for an electric bicycle according to claim 1, further comprising a light display connected to the main control chip.
3. The toppling detection circuit for an electric treadmill according to claim 2, wherein the light display comprises a front running light mounted at a front end of the electric treadmill and a rear running light mounted at a rear end of the electric treadmill.
4. The incline detection circuit for use in an electric treadmill according to claim 1, further comprising an overspeed alarm connected to the main control chip.
5. The incline detection circuit for use in an electric treadmill according to claim 4, wherein the overspeed alarm is an audible alarm, a light alarm or an audible and visual alarm.
6. The toppling detection circuit for an electric bicycle of claim 1, wherein the controller further comprises a lithium battery and a power conversion circuit, the power conversion circuit comprising a two-way buck DCDC circuit and a two-way LDO circuit;
The input end of the first path of step-down DCDC circuit is connected with the lithium battery, the output end of the first path of step-down DCDC circuit is respectively connected with the second path of step-down DCDC circuit and the motor driving circuit, the output end of the second path of step-down DCDC circuit is respectively connected with the two paths of LDO circuits and the moment/step-on frequency sensor, the output end of the first path of LDO circuit is respectively connected with the central control equipment and the three-axis sensor, and the output end of the second path of LDO circuit is respectively connected with the main control chip and the motor feedback circuit.
7. The toppling detection circuit for an electric bicycle according to claim 6, wherein the LDO circuit comprises an LDO chip, a magnetic bead F2, a capacitor C644, a capacitor C645 and a capacitor C15;
The first pin of LDO chip is connected with one end of magnetic bead F2, and the other end of magnetic bead F2 is connected with the output of second way step-down DCDC circuit, the one end of electric capacity C645 is connected with the first pin of LDO chip, the other end ground connection of electric capacity C645, the first pin of LDO chip is connected with the third pin of LDO chip, the second pin ground connection of LDO chip, the output of LDO circuit is regarded as to the fifth pin of LDO chip, the fifth pin ground connection of LDO chip passes through electric capacity C644, the fifth pin ground connection of LDO chip passes through electric capacity C15, the fourth pin unsettled of LDO chip.
8. The toppling detection circuit for an electric treadmill according to claim 1, wherein the number of triaxial sensors is one or more.
9. The toppling detection circuit for an electric bicycle according to claim 1, wherein SPI communication is adopted between the triaxial sensor and the main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322781292.4U CN220948343U (en) | 2023-10-17 | 2023-10-17 | Toppling detection circuit applied to electric pedal vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322781292.4U CN220948343U (en) | 2023-10-17 | 2023-10-17 | Toppling detection circuit applied to electric pedal vehicle |
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| CN220948343U true CN220948343U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322781292.4U Active CN220948343U (en) | 2023-10-17 | 2023-10-17 | Toppling detection circuit applied to electric pedal vehicle |
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| CN (1) | CN220948343U (en) |
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2023
- 2023-10-17 CN CN202322781292.4U patent/CN220948343U/en active Active
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