Automatic control device for steering lamp of two-wheeled electric vehicle

Abstract

The utility model discloses an automatic control device for a steering lamp of a two-wheeled electric vehicle, which relates to the field of two-wheeled electric vehicle control and is characterized in that a slide rheostat is mounted at a specified position of a vehicle head, an input end of a voltage sampling circuit is connected with a sliding end of the slide rheostat, and an output end of the voltage sampling circuit is connected with an input end of a steering detection module; the voltage sampling circuit is used for collecting circuit voltage in real time after the resistance value of the slide rheostat is changed; the output end of the steering detection module is connected with the detection end of the vehicle body controller, and the steering detection module is used for providing corresponding steering signals for the vehicle body controller by comparing sampling voltages of the voltage sampling circuit; the control end of the vehicle body controller is connected with the control ends of the steering lamp driving circuits, and the vehicle body controller is used for controlling the steering lamp driving circuits on the corresponding sides to be switched on or switched off according to received steering signals. The device adopts the mode that the rheostat is connected to a circuit, and the steering lamp is automatically turned on and off by detecting sampling voltage.

Description

Technical Field

[0001] The utility model relates to the field of two-wheeled electric vehicle control, in particular to an automatic control device for a turn signal light of a two-wheeled electric vehicle. Background Art

[0002] Two-wheeled electric vehicles have become an essential means of transportation, but this has also exposed some of their flaws. For example, when turning, the user must activate the left / right turn signals using a button switch near the handlebars. When the turn is complete, the user must press the button again to turn the turn signals off. This process is not only cumbersome, but due to manual operation and occasional unexpected situations during riding, users often forget to turn the turn signals on or off, or turn them on in the wrong direction, thus compromising user safety.

[0003] Conventional steering technologies typically use a six-axis gyroscope to determine steering direction. However, this system generates errors during angle calculation due to integration. This accumulated error can lead to significant deviations in the calculated angle. Excessive accumulated errors require user-provided calibration to accurately determine the steering return point, resulting in a low level of automation. Utility Model Content

[0004] In response to the above problems and technical requirements, the inventors have proposed an automatic control device for the turn signal of a two-wheeled electric vehicle. The device uses a variable resistor connected to the circuit to automatically turn the turn signal on and off by detecting the sampled voltage.

[0005] The technical solution of the utility model is as follows:

[0006] An automatic control device for a turn signal of a two-wheeled electric vehicle, comprising:

[0007] It includes a sliding rheostat, a voltage sampling circuit, a steering detection module, a body controller and a turn signal drive circuit;

[0008] The sliding end of the sliding rheostat is installed on the front steering shaft, and the sliding rheostat body is fixed to the front tube portion that covers the front steering shaft. The sliding end slides on the sliding rheostat body as the front steering shaft rotates.

[0009] The input end of the voltage sampling circuit is connected to the sliding end of the sliding rheostat, and the output end of the voltage sampling circuit is connected to the input end of the steering detection module. The voltage sampling circuit is used to collect the circuit voltage after the resistance value of the sliding rheostat changes in real time;

[0010] The output end of the steering detection module is connected to the detection end of the body controller. The steering detection module is used to provide a corresponding steering signal to the body controller by comparing the sampled voltage of the voltage sampling circuit;

[0011] The control end of the body controller is connected to the control end of the turn signal drive circuit. The body controller is used to control the turn signal drive circuit on the corresponding side to be turned on or off according to the received turn signal.

[0012] A further technical solution thereof is that the voltage sampling circuit includes a first resistor, a second resistor, a third resistor, a filter capacitor and a TVS tube;

[0013] One end of the first resistor is connected to the sliding end as the input end of the voltage sampling circuit, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the input end of the steering detection module as the output end of the voltage sampling circuit, one end of the third resistor, one end of the filter capacitor, and the cathode of the TVS tube are respectively connected between the first resistor and the second resistor, and the other end of the third resistor, the other end of the filter capacitor, and the anode of the TVS tube are grounded.

[0014] A further technical solution is that the sliding rheostat adopts an arc-shaped rheostat, and the sliding rheostat body is an arc-shaped resistance plate that fits the steering shaft of the vehicle head.

[0015] Its further technical solution is that the steering detection module is implemented based on multiple groups of voltage comparison circuits, and different reference voltages Vi are generated by adjusting the voltage division ratio. Then, according to the size relationship between the sampling voltage Vm and the corresponding reference voltage Vi, a first level signal or a second level signal is generated. The first level signal corresponds to the right steering signal, and the second level signal corresponds to the left steering signal.

[0016] A further technical solution is that when i=1, 3, 5, and V1<V3<V5:

[0017] If Vm≤V1, the first level signal is valid; if V1<Vm<V3, the first level signal is invalid;

[0018] If Vm≥V5, the second level signal is valid; if V3≤Vm<V5, the second level signal is invalid.

[0019] A further technical solution is that when i=1, 2, 3, 4, 5, and V1<V2<V3<V4<V5:

[0020] If Vm≤V1, the first level signal is valid; if V2≤Vm<V3, the first level signal is invalid;

[0021] If Vm≥V5, the second level signal is valid; if V3≤Vm≤V4, the second level signal is invalid.

[0022] A further technical solution is that one fixed end of the sliding rheostat is connected to the 5V power supply of the vehicle body, and the other fixed end is grounded.

[0023] Its further technical solution is that when the sampling voltage is 2.5V, the corresponding vehicle head steering angle is the initial angle 0°, indicating that the vehicle head is returning to the center position;

[0024] When the sampling voltage is between 0V and 2.5V, the corresponding vehicle steering angle is between 0° and 90°, indicating that the vehicle is turning right.

[0025] When the sampling voltage is between 2.5V and 5V, the corresponding vehicle steering angle is between -90° and 0°, indicating that the vehicle is turning left.

[0026] Its further technical solution is that the sampling voltage value corresponding to each 1° steering angle of the vehicle head is 0.0278V.

[0027] The beneficial technical effects of the utility model are:

[0028] This device uses a sliding rheostat instead of a gyroscope. The rheostat is mounted on a designated area on the front of the vehicle. Turning the handlebars causes the sliding end to slide across the rheostat body, changing the resistance of the rheostat connected to the voltage sampling circuit. The steering detection module detects the sampled voltage and provides a turn signal corresponding to the current vehicle direction. Ultimately, the body controller uses this turn signal to switch the corresponding turn signal driver circuit on and off, automatically turning the turn signal on and off. Furthermore, this device uses an arc-shaped rheostat, whose curved resistor plate conforms to the vehicle's front section and does not affect the overall vehicle's aesthetics.

[0029] Compared to gyroscope solutions, this device solves the problem of requiring periodic recalibration of the vehicle's front and rear aligning to the vehicle's body to achieve initial calibration and calibrate the gyroscope's initial state. It accurately recognizes user intent during steering without manual intervention, enhancing vehicle intelligence and safety, and providing a better driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the automatic control device for the turn signal of a two-wheeled electric vehicle provided in this application.

[0031] Figure 2 This is a schematic diagram of the installation of the sliding rheostat and the steering shaft of the vehicle head provided in this application.

[0032] Figure 3 This is a circuit diagram of the sliding rheostat and voltage sampling circuit provided by this application.

[0033] Figure 4 This is a schematic diagram of the relationship between the sampling voltage and the steering angle of the vehicle head provided in this application. DETAILED DESCRIPTION

[0034] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0035] Please refer to Figure 1 As shown, one embodiment of the present application provides an automatic control device for the turn signal of a two-wheeled electric vehicle, comprising a sliding rheostat, a voltage sampling circuit, a steering detection module, a body controller, and a turn signal drive circuit. The sliding rheostat is mounted at a designated location on the front of the vehicle, the input end of the voltage sampling circuit is connected to the sliding end of the sliding rheostat, the output end of the voltage sampling circuit is connected to the input end of the steering detection module, the output end of the steering detection module is connected to the detection end of the body controller, and the control end of the body controller is connected to the control end of the turn signal drive circuit.

[0036] like Figure 2 As shown (top view on the left, isometric view on the right), the sliding end P of the sliding rheostat is mounted on the steering shaft 1, and the sliding rheostat body 2 is fixed to the front tube portion (not shown) that encloses the steering shaft. One fixed end (pin 1) of the sliding rheostat is connected to the 5V power supply of the vehicle body, and the other fixed end (pin 2) is grounded. When the handlebars are turned, the sliding end P slides on the sliding rheostat body 2 as the steering shaft 1 rotates, thereby changing the resistance value of the sliding rheostat. In this embodiment, the sliding rheostat is an arc-shaped rheostat, and the sliding rheostat body 2 is an arc-shaped resistor plate that fits the steering shaft. The shape of the arc-shaped resistor plate is adapted to the front of the vehicle and does not affect the overall appearance of the vehicle.

[0037] The voltage sampling circuit is used to collect the circuit voltage after the resistance value of the sliding rheostat changes in real time, and send the sampled voltage to the steering detection module through the sampling port at point D. Its circuit structure is as follows: Figure 3 As shown. The voltage sampling circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a filter capacitor C1 and a TVS tube D1. Among them, one end of the first resistor R1 is connected to the sliding terminal P as the input end of the voltage sampling circuit, the other end of the first resistor R1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the input end of the steering detection module as the output end of the voltage sampling circuit. One end of the third resistor R3, one end of the filter capacitor C1, and the cathode of the TVS tube D1 are respectively connected between the first resistor R1 and the second resistor R2. The other end of the third resistor R3, the other end of the filter capacitor C1, and the anode of the TVS tube D1 are grounded. After the sliding rheostat R0 is connected to the circuit, the voltage is divided by R1 and R3 and then sent to the steering detection module through R2. The filter capacitor C1 can reduce the wave noise, and the TVS tube D1 can prevent the surge in the circuit from entering the sampling port at point D.

[0038] The steering detection module is used to provide the corresponding steering signal to the vehicle body controller by comparing the sampling voltage of the voltage sampling circuit. The design principle of this module is to convert the sampling voltage into the corresponding steering angle of the vehicle head, combined with Figure 4As shown, when the sampling voltage is 2.5V, the sliding end is located in the middle of the rheostat body, and the corresponding vehicle head steering angle is the initial angle 0°, indicating that the vehicle head is back to the center, that is, the vehicle head and the vehicle body are on the same horizontal line; when the sampling voltage is between 0V and 2.5V, the sliding end is located at the position of the rheostat body biased towards pin 2, and the corresponding vehicle head steering angle is between 0° and 90°, indicating that the vehicle head turns right; when the sampling voltage is between 2.5V and 5V, the sliding end is located at the position of the rheostat body biased towards pin 1, and the corresponding vehicle head steering angle is between -90° and 0°, indicating that the vehicle head turns left, and the sampling voltage value corresponding to each 1° steering angle of the vehicle head is 0.0278V.

[0039] In this embodiment, the turn detection module is implemented using multiple voltage comparison circuits. Different reference voltages Vi are generated by adjusting the voltage divider ratio. Based on the magnitude relationship between the sampled voltage Vm and the corresponding reference voltage Vi, a first-level signal or a second-level signal is generated. The first-level signal corresponds to a right turn signal, and the second-level signal corresponds to a left turn signal. When i = 1, 3, or 5, and V1 < V3 < V5: if Vm ≤ V1, the first-level signal is valid; if V1 < Vm < V3, the first-level signal is invalid. If Vm ≥ V5, the second-level signal is valid; if V3 ≤ Vm < V5, the second-level signal is invalid. To further improve detection accuracy, when i = 1, 2, 3, 4, or 5, and V1 < V2 < V3 < V4 < V5: if Vm ≤ V1, the first-level signal is valid; if V2 ≤ Vm < V3, the first-level signal is invalid. If Vm ≥ V5, the second-level signal is valid; if V3 ≤ Vm < V4, the second-level signal is invalid. Among them, valid represents a high level, and invalid represents a low level.

[0040] The value of Vi is determined by the vehicle's steering angle θ. In this embodiment, when θ ≥ 15°, the right turn signal is on, and V1 is set to 2.083V. When 0° < θ ≤ 10°, the right turn signal is off, and V2 is set to 2.222V and V3 is set to 2.5V. When -10° ≤ θ ≤ 0°, the left turn signal is off, and V4 is set to 2.778V. When θ ≤ -15°, the left turn signal is on, and V5 is set to 2.917V.

[0041] The body controller is used to control the turn signal drive circuit on the corresponding side to be turned on or off according to the received turn signal. The automatic steering start strategy of this device includes: when the sampling voltage Vm detected by point D is ≥2.917V (that is, the front steering angle θ≤-15°), the steering detection module outputs a second level signal to the body controller that is valid. At this time, the body controller determines that the user has an intention to turn left, and then controls the turn signal drive circuit on the left to be turned on, and the left turn signal is turned on; when the sampling voltage Vm detected by point D is ≤2.083V (that is, the front steering angle θ≥15°), the steering detection module outputs a first level signal to the body controller that is valid. At this time, the body controller determines that the user has an intention to turn right, and then controls the turn signal drive circuit on the right to be turned on, and the right turn signal is turned on.

[0042] The automatic steering shutdown (return to center) strategy of this device includes: when the sampling voltage detected at point D is 2.5V≤Vm≤2.778V (i.e., the front steering angle θ≥-10°), the steering detection module outputs an invalid second-level signal to the body controller. At this time, the body controller determines that the user has the intention to cancel the left turn, and then controls the left turn signal drive circuit to be shut down, and the left turn signal is turned off; when the sampling voltage detected at point D is 2.222V≤Vm<2.5V (i.e., the front steering angle θ≤10°), the steering detection module outputs an invalid first-level signal to the body controller. At this time, the body controller determines that the user has the intention to cancel the right turn, and then controls the right turn signal drive circuit to be shut down, and the right turn signal is turned off.

[0043] It should be noted that the turn signal drive circuit is implemented based on an existing circuit equipped with devices such as MOS tubes. The turn detection module can also be implemented based on other detection circuits that can set multiple thresholds, or the set reference voltage threshold can be burned into the microcontroller, and the microcontroller function can be used to perform voltage comparison to implement the above strategy.

[0044] The above description is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. An automatic control device for the turn signal of a two-wheeled electric vehicle, characterized in that: It includes a sliding rheostat, a voltage sampling circuit, a steering detection module, a body controller and a turn signal drive circuit; The sliding end of the sliding rheostat is installed on the front steering shaft, and the sliding rheostat body is fixed to the front tube portion that covers the front steering shaft. The sliding end slides on the sliding rheostat body as the front steering shaft rotates. The input end of the voltage sampling circuit is connected to the sliding end of the sliding rheostat, and the output end of the voltage sampling circuit is connected to the input end of the steering detection module. The voltage sampling circuit is used to collect the circuit voltage after the resistance value of the sliding rheostat changes in real time; The output end of the steering detection module is connected to the detection end of the vehicle body controller, and the steering detection module is used to provide a corresponding steering signal to the vehicle body controller by comparing the sampled voltage of the voltage sampling circuit; The control end of the vehicle body controller is connected to the control end of the turn signal driving circuit. The vehicle body controller is used to control the turn signal driving circuit on the corresponding side to be turned on or off according to the received turn signal.

2. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 1, characterized in that: The voltage sampling circuit includes a first resistor, a second resistor, a third resistor, a filter capacitor and a TVS tube; One end of the first resistor is connected to the sliding end as the input end of the voltage sampling circuit, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the input end of the steering detection module as the output end of the voltage sampling circuit, one end of the third resistor, one end of the filter capacitor, and the cathode of the TVS tube are respectively connected between the first resistor and the second resistor, and the other end of the third resistor, the other end of the filter capacitor, and the anode of the TVS tube are grounded.

3. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 1, characterized in that: The sliding rheostat is an arc-shaped rheostat, and the sliding rheostat body is an arc-shaped resistance plate that fits the steering shaft of the vehicle head.

4. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 1, characterized in that: The steering detection module is implemented based on multiple groups of voltage comparison circuits. Different reference voltages Vi are generated by adjusting the voltage division ratio. Then, a first level signal or a second level signal is generated according to the size relationship between the sampling voltage Vm and the corresponding reference voltage Vi. The first level signal corresponds to a right steering signal, and the second level signal corresponds to a left steering signal.

5. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 4, characterized in that: When i=1,3,5, and V1<V3<V5: If Vm≤V1, the first level signal is valid; if V1<Vm<V3, the first level signal is invalid; If Vm≥V5, the second level signal is valid; if V3≤Vm<V5, the second level signal is invalid.

6. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 4, characterized in that: When i=1,2,3,4,5, and V1<V2<V3<V4<V5: If Vm≤V1, the first level signal is valid; if V2≤Vm<V3, the first level signal is invalid; If Vm≥V5, the second level signal is valid; if V3≤Vm≤V4, the second level signal is invalid.

7. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 1, characterized in that: One fixed end of the sliding rheostat is connected to the 5V power supply of the vehicle body, and the other fixed end is grounded.

8. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 7, characterized in that: When the sampling voltage is 2.5V, the corresponding vehicle head steering angle is the initial angle 0°, indicating that the vehicle head is returning to the center position; When the sampling voltage is between 0V and 2.5V, the corresponding vehicle steering angle is between 0° and 90°, indicating that the vehicle is turning right. When the sampling voltage is between 2.5V and 5V, the corresponding vehicle head steering angle is between -90° and 0°, indicating that the vehicle head is turning left.

9. The automatic control device for turning lights of a two-wheeled electric vehicle according to claim 7, characterized in that: The corresponding sampling voltage value for every 1° steering angle of the vehicle head is 0.0278V.

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