Electric transport vehicle

Abstract

The invention discloses an electric transport vehicle which comprises an operation unit, the operation unit comprises a speed operation unit and a direction operation unit, the speed operation unit is used for inputting a speed instruction, and the direction operation unit is used for inputting a direction instruction; the control unit sends a corresponding walking instruction according to the speed instruction and the direction instruction; the power unit executes a walking instruction; wherein the control unit further detects whether the operation unit completes the specified action or not when receiving the change of the direction instruction within the preset time, and sends a corresponding walking instruction to the power unit according to the latest direction instruction after detecting that the operation unit completes the specified action, otherwise, the control unit sends a parking instruction. According to the invention, the danger caused by changing the walking direction due to multiple times of misoperation of an operator in the walking process of the electric transport vehicle can be avoided, and the driving safety of the electric transport vehicle is improved.

Description

Technical Field

[0001] The invention relates to an electric transport vehicle, in particular to an electric transport vehicle capable of preventing misoperation. Background Art

[0002] Electric transport vehicles are freight vehicles that use electricity to carry out transportation operations. Currently, transport vehicles can be divided into fuel-powered transport vehicles driven by fuel power and electric transport vehicles driven by batteries and motors according to the type of power. The latter is superior to the former in terms of economy, operating comfort, noise and environmental protection. Therefore, the application of electric transport vehicles has become more and more extensive in recent years. When the existing transport vehicles perform forward or reverse operations during operation, the vehicle response may be too fast, and the operator will immediately run in the new direction after switching the direction, especially when the direction operation button is accidentally touched, which is easy to cause danger to the operator.

[0003] Therefore, Chinese patent document CN1026789098B discloses a gear recognition system for preventing misoperation on an electric vehicle, including a gear switching device, a gear signal recognition device, an MCU, a drive motor and a reducer; the gear switching device is connected to the gear signal recognition device, the gear signal recognition device is connected to the MCU via a CAN bus, and the MCU controls the drive motor to work; the drive motor is connected to the reducer. The present invention also provides a gear recognition method for preventing misoperation on an electric vehicle. This method can prevent the vehicle from suddenly decelerating and causing an accident if the driver accidentally makes a misoperation during the driving of the vehicle. In the prior art, the driver's misoperation is prevented by determining whether the gear is valid. When the gear signal is determined to be invalid, the corresponding gear shifting operation is not performed.

[0004] Chinese patent document 104149788B discloses a method for preventing the driver from misoperating an electric vehicle, which is to adopt conditional recognition of the ignition key and the shift signal in the whole vehicle control strategy, and perform initialization, fault detection, ignition detection and high voltage power-on in sequence after the electric vehicle is powered on for the first time; then perform gear detection and enter each gear subroutine. Under the operation of each gear submodule, the program sends a motor control command to control the motor normally, and shields the gear and key signals. Only when the driver steps on the brake pedal so that the motor torque is 0Nm, the subroutine is jumped out and the main program is returned to detect the key and gear. The technical solution of the present invention overcomes the technical problem that during the driving process of the electric vehicle, the driver improperly operates the ignition key / shift mechanism, and the control system fails to identify it, resulting in a change in the motor state, and then a sharp change in the state of the whole vehicle, which endangers the safety of the occupants. In the prior art, the ignition key and the shift signal are combined and an effective signal is selected from them to control the whole vehicle to perform the corresponding action.

[0005] In the above-mentioned prior art, the operator's misoperation is avoided by determining whether the corresponding control signal is valid. However, in the actual operation of the electric transport vehicle, there is also dangerous driving under normal operation by the operator, which may also cause danger to the operator. Summary of the invention

[0006] The present invention provides an electric transport vehicle capable of preventing an operator from operating incorrectly, comprising an operating unit, the operating unit comprising a speed operating unit and a direction operating unit, the speed operating unit being used to input a speed instruction, and the direction operating unit being used to input a direction instruction; The control unit sends corresponding walking instructions according to the speed instruction and direction instruction; Power unit, executes walking instructions; Among them, when the control unit receives a change in direction instruction within a predetermined time, the control unit controls the power unit to execute speed reset or parking action, and continuously detects whether the operating unit has completed the specified action. After detecting that the power unit has completed speed reset or parking action and the operating unit has completed the specified action, the control unit sends the corresponding walking instruction to the power unit according to the latest direction instruction, otherwise the control unit sends a parking instruction.

[0007] Note: The walking direction in this scheme includes two walking directions: forward or backward.

[0008] Compared with the prior art, in this solution, when the control unit receives a change in direction instruction within a predetermined time, it will also control the power unit to execute speed zeroing or parking action, and continuously detect whether the operating unit has completed the specified action, so as to distinguish whether the operation of the direction instruction is a normal operation of the operator or an erroneous operation of the operator. If it is detected that the power unit has completed the speed zeroing or parking action and the operating unit has completed the specified action, it means that the current operation is a normal operation of the operator. At this time, the control unit controls the walking unit to execute the corresponding walking instruction. Otherwise, it means that the current operation is an erroneous operation of the operator. At this time, the control unit sends a parking instruction, thereby avoiding the danger of the electric transport vehicle causing the operator to change the walking direction multiple times due to erroneous operations during the movement, thereby improving the driving safety of the electric transport vehicle.

[0009] Preferably, when the control unit receives multiple direction instructions within a predetermined time, when it detects that the speed operation unit performs a zeroing operation and adjusts the speed to a new set speed, it determines that the operation unit completes the specified action. In this solution, when it is detected that the speed operation unit performs a zeroing operation and adjusts the speed to a new set speed, it is determined that the previous multiple direction instructions are normal operations of the operator. Only then does the control unit control the walking unit to execute the corresponding walking instructions, thereby avoiding the danger caused by the operator's multiple misoperations to change the walking direction during the travel of the electric transport vehicle, thereby improving the driving safety of the electric transport vehicle.

[0010] Preferably, the operating unit further includes a start-stop switch that can be placed in a parking position or a driving position. When the control unit receives multiple direction instructions within a predetermined time, it detects that the start-stop switch is placed in the parking position and then in the driving position, and determines that the operating unit completes the specified action. In this solution, the start-stop switch is set to identify misoperation, which can further improve the driving safety of the electric transport vehicle.

[0011] Preferably, a braking unit is further included, and the control unit sends a stop command to the power unit and / or sends a braking command to the braking unit before detecting whether the operating unit completes the specified action, and the braking unit brakes the power unit upon receiving the braking command. In this solution, the provision of the braking unit can improve the safety of the reversing operation, thereby further ensuring the safe driving of the electric transport vehicle.

[0012] Preferably, when the control unit detects that the direction of travel of the previous instruction is different from the direction of travel of the current latest instruction, the control unit sends a stop instruction to the power unit, and when it detects that the speed of the power unit is zero or close to zero, it sends a braking instruction to the brake unit. After the brake unit completes braking, the control unit releases the braking state of the brake unit and controls the power unit to execute the latest instruction. In this solution, the reversing operation is performed after the braking is completed, which further ensures the safe driving of the electric transport vehicle.

[0013] Preferably, when the control unit detects that the direction of travel of the previous instruction is the same as the direction of travel of the current latest instruction, the control unit detects the opening of the speed operating unit and the current speed of the power unit, and controls the power unit to match the opening of the speed operating unit. This solution can prevent setbacks and further ensure the safe driving of the electric transport vehicle.

[0014] Preferably, when it is detected that the opening of the operating unit is greater than the current speed of the power unit, the control unit increases the speed of the power unit to a speed that matches the operating unit, and when it is detected that the opening of the operating unit is less than the current speed of the power unit, the control unit reduces the speed of the power unit to a speed that matches the operating unit. This solution can prevent setbacks and further ensure the safe driving of the electric transport vehicle.

[0015] The present invention has the following beneficial effects: 1. The present invention can distinguish whether the operation of multiple direction instructions is a normal operation of the operator or an erroneous operation of the operator. If it is detected that the operating unit has completed the specified action, it means that the current operation is a normal operation of the operator. At this time, the control unit controls the walking unit to execute the corresponding walking instruction. Otherwise, it means that the current operation is an erroneous operation of the operator. At this time, the control unit sends a parking instruction, thereby avoiding the danger of the electric transport vehicle changing the walking direction due to multiple erroneous operations of the operator during the travel process, thereby improving the driving safety of the electric transport vehicle.

[0016] 2. The present invention can improve the safety of switching operations, thereby further ensuring the safe driving of the electric transport vehicle.

[0017] 3. The present invention can prevent setbacks and further ensure the safe driving of the electric transport vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an electric transport vehicle embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods: 1. Definition Parking command: refers to the operating command to keep the electric transport vehicle in the parked state.

[0020] Parking: refers to the state where the electric transport vehicle stops moving and is fixed in one position.

[0021] Braking: refers to the action of stopping or reducing the speed of a running electric transport vehicle.

[0022] 2. The embodiment is basically as shown in the attached Figure 1 Shown: An electric transport vehicle, comprising an energy storage unit, which provides electric energy for the electric transport vehicle; An operation unit, comprising a speed operation unit and a direction operation unit, wherein the speed operation unit is used to input a speed instruction, and the direction operation unit is used to input a direction instruction; The control unit sends corresponding walking instructions according to the speed instruction and direction instruction; Power unit, executes walking instructions; Braking unit, executing braking command; And other structural parts of the vehicle.

[0023] Among them, when the control unit receives a change in direction instruction within a predetermined time, it sends a stop instruction to the power unit and / or sends a braking instruction to the braking unit. The braking unit brakes the power unit when receiving the braking instruction, and the power unit performs speed reset or parking action; then the control unit detects whether the operating unit has completed the specified action. After detecting that the power unit has completed the speed reset or parking action and the operating unit has completed the specified action, the control unit sends a corresponding walking instruction to the power unit according to the latest direction instruction, otherwise the control unit sends a parking instruction.

[0024] When the control unit detects that the direction of travel of the previous instruction is different from the direction of travel of the current latest instruction, the control unit sends a stop instruction to the power unit, and when it detects that the speed of the power unit is zero, it sends a braking instruction to the braking unit. After the braking unit completes braking, the control unit releases the braking state of the braking unit and controls the power unit to execute the latest instruction.

[0025] When the control unit detects that the direction of travel of the previous instruction is the same as the direction of travel of the current latest instruction, the control unit detects the opening of the speed operating unit and the current speed of the power unit, and controls the power unit to match the opening of the speed operating unit. Specifically, when it is detected that the opening of the operating unit is greater than the current speed of the power unit, the control unit increases the speed of the power unit to a speed that matches the operating unit, and when it is detected that the opening of the operating unit is less than the current speed of the power unit, the control unit reduces the speed of the power unit to a speed that matches the operating unit.

[0026] In the above process, when the operation unit is detected to have completed the prescribed action, when the speed operation unit is detected to have performed a zeroing operation and adjusted the speed to a new set speed, it is determined that the operation unit has completed the prescribed action. The speed operation unit adopts a finger-shift speed regulator that automatically performs a zeroing operation after the operator removes the operating force.

[0027] Embodiment 2 The difference from the first embodiment is that in this embodiment, the operating unit also includes a start-stop switch that can be placed in the parking position or the driving position. When the control unit receives multiple direction instructions within a predetermined time, it detects that the start-stop switch is placed in the parking position and then in the driving position, and determines that the operating unit has completed the specified action. In this embodiment, the speed operating unit will not perform an automatic zeroing operation and can stop at any speed value position, but the operating unit is additionally provided with a start-stop handle of the start-stop switch that can be placed in the parking position or the driving position. When the start-stop handle is released, it is placed in the parking position, and when the start-stop handle is pinched, it is placed in the driving position. When the start-stop handle is first released and then pinched again, the control unit sends a corresponding travel instruction to the power unit action according to the latest direction instruction.

[0028] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An electric transport vehicle, comprising an operating unit, wherein the operating unit comprises a speed operating unit and a direction operating unit, wherein the speed operating unit is used to input a speed instruction, and the direction operating unit is used to input a direction instruction; A control unit sends a corresponding walking instruction according to the speed instruction and the direction instruction; A power unit, executing the walking instruction; It is characterized in that: when the control unit receives a change in direction instruction within a predetermined time, the control unit controls the power unit to execute speed zeroing or parking action, and continuously detects whether the operating unit has completed the specified action. After detecting that the power unit has completed speed zeroing or parking action and the operating unit has completed the specified action, the control unit sends a corresponding walking instruction to the power unit according to the latest direction instruction, otherwise the control unit sends a parking instruction.

2. The electric transport vehicle according to claim 1, characterized in that: When the control unit receives multiple direction instructions within a predetermined time, and detects that the speed operation unit performs a zeroing operation and adjusts the speed to a new set speed, it is determined that the operation unit completes a specified action.

3. The electric transport vehicle according to claim 1, characterized in that: The operating unit also includes a start-stop switch that can be placed in a parking position or a driving position. When the control unit receives multiple direction instructions within a predetermined time, it detects that the start-stop switch is placed in the parking position and then in the driving position, and determines that the operating unit completes the specified action.

4. The electric transport vehicle according to any one of claims 1 to 3, characterized in that: It also includes a braking unit. The control unit sends a stop command to the power unit and / or sends a braking command to the braking unit before detecting whether the operating unit completes a specified action. The braking unit brakes the power unit when receiving the braking command.

5. The electric transport vehicle according to claim 4, characterized in that: When the control unit detects that the direction of travel of the previous instruction is different from the direction of travel of the current latest instruction, the control unit sends a stop instruction to the power unit, and when it detects that the speed of the power unit is zero or close to zero, the control unit sends a braking instruction to the braking unit. After the braking unit completes braking, the control unit releases the braking state of the braking unit and controls the power unit to execute the latest instruction.

6. The electric transport vehicle according to claim 5, characterized in that: When the control unit detects that the travel direction of the previous instruction is the same as the travel direction of the current latest instruction, the control unit detects the opening of the speed operating unit and the current speed of the power unit, and controls the power unit to match the opening of the speed operating unit.

7. The electric transport vehicle according to claim 6, characterized in that: When it is detected that the opening of the operating unit is greater than the current speed of the power unit, the control unit increases the speed of the power unit to a speed that matches the operating unit. When it is detected that the opening of the operating unit is less than the current speed of the power unit, the control unit reduces the speed of the power unit to a speed that matches the operating unit.

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