TWI564213B - The electric vehicle drive apparatus and method for detecting - Google Patents

Description

Electric vehicle riding detection device and method

The invention relates to a safety protection device for an electric vehicle, in particular to a detecting device capable of detecting whether a driver has been riding on an electric vehicle.

Unlike the traditional locomotives that use fuel, the power source of the electric vehicle comes from the battery. The battery supplies power to the motor to generate power. Under the premise of not using the internal combustion engine, the noise generated by the electric vehicle is relatively reduced. If the surrounding environment has interference from background noise such as other road vehicles, most users or pedestrians can hardly perceive the sound produced by the electric vehicle. The electric vehicle is almost silent and silent. This feature is always the advantage of strong advertised. One.

However, the quiet and low-noise characteristics of the above-mentioned electric vehicles may also bring about the drawbacks of the opposite side under certain circumstances. For example, when an electric vehicle will drive past a pedestrian, the pedestrian cannot detect that the electric vehicle arrives without first evading, and a collision accident may occur; for example, the driver has previously started the vehicle power supply, but the quiet state is silent because there is no engine. When not in the vehicle, it is easy to accidentally touch the throttle handle during the car-holding process due to unnoticed attention, and the driver is not ready to completely generate the vehicle instantaneous explosion, causing injury.

Although existing electric vehicles have some safety protection designs, such as side bracket power-off switches, charging seat power-off switches, etc., there is no relevant protection measures to determine whether the driver has been riding on the electric vehicle, and there is indeed room for improvement.

In view of the shortcomings of the prior art, the main object of the present invention is to provide an electric vehicle riding detection device capable of judging whether a person is seated on a seat cushion of an electric vehicle, and prohibiting the motor from operating when no one is riding to avoid the vehicle being accidentally touched. An accidental collision occurred.

In order to achieve the foregoing objective, the electric vehicle riding detection device of the present invention comprises: a sensing switch group disposed inside the seat cushion of the electric vehicle and electrically connected to an operating power source, wherein the operating power source has a Detecting the level, the sensing switch group changes its on/off state according to the pressure applied to the seat cushion, and the sensing switch group can transmit the detecting level in the conducting state; Electrically connecting the sensing switch group, and starting timing when the detection level is not received. When the timing reaches a preset time value and the detection level is not received continuously, the motor of the electric vehicle is interrupted. powered by.

The sensing switch set disposed inside the seat cushion can reflect whether the person is riding on the electric vehicle, and the sensing switch group becomes a disconnected state when there is no external pressure on the seat cushion, so the controller cannot pass the sensing switch The group receives the detection level. At this time, the controller starts the timing, and after counting for a preset time and continuously does not receive the detection level, it is determined that no one is riding on the seat cushion, so the interruption is provided to the motor. Electricity, motor operation is prohibited, to avoid accidental collision of the vehicle due to user misuse.

Please refer to FIG. 1 and FIG. 2, which are block diagrams of the circuit of the present invention, including a sensing switch group 10 and a controller 20 connected thereto.

The sensing switch set 10 is disposed inside the seat cushion 100 of the electric vehicle and electrically connected between an operating power source 30 and an input end of the controller 20, wherein the operating power source 30 can provide a level, for example A positive voltage level (such as +VCC) or a ground level (GND).

The sensing switch group 10 is composed of at least one pressure switch that changes its on/off state when subjected to an external pressure, for example, from an original open circuit to a conducting state when subjected to pressure, and vice versa. In the following description, the pressure-opening relationship is exemplified by the fact that the original open circuit is turned into a conducting state when subjected to pressure. The sensing switch group 10 can be a pressure switch, or a pair of pressure switches, or a plurality of pairs of pressure switches; please refer to FIG. 2, when composed of a pair of pressure switches A, B, The positions of the pressure switches A and B are corresponding to the position of the driver when riding on the seat cushion 100 to detect whether a person is riding on the electric vehicle, wherein when both pressure switches A and B are pressed and turned on, The detection level is transmitted to the controller 20; and as shown in FIG. 3, when composed of the plurality of pairs of pressure switches A1~A4, B1~B4, they can be evenly distributed in pairs on both sides of the seat cushion 100. Providing a larger area of pressure detection, when any of the pressure switches on both sides are turned on, the detection level can be transmitted to the controller 20, for example, the pressure switch A1 and the pressure switch B2 can be transmitted after being pressed. The detection level is to the controller 20.

The controller 20 may be constituted by an electronic control unit (ECU) of the vehicle itself or a separate controller connected to the electronic control unit (ECU). The controller 20 includes an interrupt circuit 21, a timing circuit 22, and an output circuit 23. The interrupt circuit 21 is connected to the sensing switch group 10 to determine whether the detection level is received. The timing circuit 22 The interrupt circuit 21 is connected, and when the interrupt circuit 21 does not receive the detection level, the timer is started, and after the timer reaches a preset time value (for example, 5 seconds), a power-off signal is output; the output circuit 23 is The power supply for controlling the motor of the vehicle is connected to the timing circuit 22. When the output circuit 23 receives the power-off signal, the power supplied to the motor is interrupted, so that the motor of the electric vehicle cannot be started.

For the determination process of the controller 20, as shown in FIG. 4, the interrupt circuit continuously detects (S40) to detect whether the detection level is received; and determines whether the sensing switch group is turned on (S41), if If the detection level is received, the person on the seat cushion can ride the power to the motor (S42). If the detection level is not received, there may be no person on the seat cushion. The timing circuit 22 is started to start timing; and it is determined whether the timing has passed the preset time value (S43). If the preset time value has not been exceeded, the power can still be normally supplied to the motor (S42). Otherwise, if the preset time value is exceeded. At this time, it can be judged that no person is seated on the seat cushion, that is, the power supply of the motor is interrupted (S44), and the motor is stopped.

The timing mechanism of the present invention described above is mainly to prevent the controller 20 from immediately powering off the vehicle without a driver when the driver temporarily leaves the seat cushion. For example, when the driver stops the ride at the intersection due to the red light, and temporarily moves the body and briefly leaves the seat cushion, if the controller does not have this timing mechanism, the power supply of the motor will be cut off immediately, so that the vehicle stops working instantaneously. It is feared that an accident will occur, and this problem can be avoided by adding a timing mechanism.

In summary, the present invention can determine whether there is a driver ride on the seat cushion of the electric vehicle, and when it is determined that no one is riding, the power supplied to the motor is interrupted. Therefore, even if the driver accidentally touches the throttle handle during the car-holding process, there will be no problem that the vehicle will run out of control and provide better safety for the car users.

10‧‧‧Sensing switch group
20‧‧‧ Controller
21‧‧‧Interrupt circuit
22‧‧‧Timekeeping Circuit
23‧‧‧Output circuit
30‧‧‧Operating power supply
100‧‧‧Cushion

Fig. 1 is a circuit block diagram of an electric vehicle riding detection device of the present invention. Figure 2 is a plan view showing the first embodiment of the sensing switch group of the present invention. Figure 3 is a plan view showing a second embodiment of the sensing switch group of the present invention. Figure 4: Flow chart of the judgment of the controller of the present invention.

10‧‧‧Sensing switch group

20‧‧‧ Controller

21‧‧‧Interrupt circuit

22‧‧‧Timekeeping Circuit

23‧‧‧Output circuit

30‧‧‧Operating power supply

Claims (9)

An electric vehicle riding detection device comprises: a sensing switch group disposed inside the seat cushion of the electric vehicle and electrically connected to an operating power source, wherein the operating power source has a detecting level, the feeling The measuring switch group changes its on/off state according to the pressure applied to the seat cushion, and the sensing switch group can transmit the detecting level in the conducting state; a controller electrically connects the sensing switch The group includes: an interrupt circuit connected to the sensing switch group to determine whether the detection level is received; a timing circuit is connected to the interrupt circuit, and the detection circuit does not receive the detection level The bit timing starts, and after a predetermined time value is reached, a power-off signal is output, and the controller interrupts the power supply of the motor of the electric vehicle. The electric vehicle riding detection device according to claim 1, wherein the sensing switch group comprises a pressure switch, wherein the pressure switch is in an on state when the seat cushion is stressed, and is in an off state. The electric vehicle riding detection device according to claim 1, wherein the sensing switch group comprises two pressure switches, wherein the position of the two pressure switches in the seat cushion corresponds to a ride of the driver, and each pressure switch has a seat cushion. When the force is applied, the sensing switch group transmits the detection level to the controller when both pressure switches are turned on. The electric vehicle riding detection device according to claim 1, wherein the sensing switch group includes a plurality of pressure switches distributed on both sides of the seat cushion, and each of the pressure switches is in a conducting state when the seat cushion is stressed; When any pressure switch is turned on on both sides of the seat cushion, the sensing switch group transmits the detection level to the controller. The electric vehicle riding detection device according to any one of the preceding claims, wherein the controller further comprises: an output circuit connected to the timing circuit, and interrupted for giving when the power-off signal is received The power of the motor. The electric vehicle riding detection device according to claim 5, wherein the detecting level is a positive voltage level or a grounding level. The electric vehicle riding detection device according to claim 6, wherein the controller is an electronic control unit (ECU) of the electric vehicle. An electric vehicle riding detection method is applied to an electric vehicle having a sensing switch group in a seat cushion, the sensing switch group being electrically connected between a controller and an operating power source, the method comprising: The controller continuously detects that the sensing switch group is in an on state or an open state, wherein the sensing switch group is in a state in which the user is in a seat state when the user is seated, and is disconnected when the user is seated on the seat cushion. The controller starts timing when the detection level is not received; determines whether the timing time has reached a preset time value; if the preset time value has not been exceeded, the controller controls normal power supply to the motor; if the timing exceeds The preset time value and the controller continuously does not receive the detection level, and the controller outputs a power-off signal to interrupt the power supplied to the motor. The method for detecting an electric vehicle ride according to claim 8, wherein the detection level is a positive voltage level or a ground level.