Control system, induction pad and electric wheelchair

Abstract

The utility model discloses a control system, induction pad and electric wheelchair, including power supply, controller, induction device, induction device switch and drive motor, power supply is connected with the controller, the controller includes motor operation control module, induction device control module, induction device is connected with induction device control module, induction device switch is connected with the motor operation control module. The induction device switch is connected with the induction device control module, the induction device control module is connected with the motor operation control module, and the driving motor is connected with the motor operation control module. The control system comprises pressure sensing control for controlling starting and stopping of the driving motor through feedback signals of the sensing device and standby control for controlling the driving motor by directly utilizing the controller under the condition that the sensing device fails, and safe, continuous and stable operation of the control system is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric wheelchairs and relates to a control system, a sensing pad and an electric wheelchair. Background Art

[0002] With the development of science and technology, electric wheelchairs have gradually replaced mechanical wheelchairs. Due to the increasing aging of society, most people who use electric wheelchairs are elderly people. Existing electric wheelchairs are usually equipped with motors, and the wheelchair is started by a switch. Although the use of electric wheelchairs has brought a lot of convenience, there are still many safety hazards. For example, the elderly do not sit on or lean on the wheelchair, but accidentally touch it, causing the wheelchair to start by mistake, creating a collision risk. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a control system, a sensing pad and an electric wheelchair.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a control system, including a power supply, a controller, a sensing device and a drive motor, the power supply is connected to the controller, the controller includes a motor operation control module and a sensing device control module, the sensing device is connected to the sensing device control module, the sensing device control module is connected to the motor operation control module, and the drive motor is connected to the motor operation control module.

[0005] Furthermore, it also includes a sensing device switch, the control system includes a pressure sensing control circuit composed of a sensing device, a sensing device control module, a motor operation control module and a driving motor, and a backup control circuit composed of the motor operation control module and the driving motor, the sensing device switch is connected to the sensing device control module and the motor operation control module, and the sensing device switch switches the pressure sensing control circuit and the backup control circuit.

[0006] Furthermore, it also includes an alarm module, which is connected to the controller.

[0007] Furthermore, it also includes a switch module, the sensing device control module is connected to the switch module, and the switch module controls the on / off of the control system.

[0008] A sensing pad comprises a sensing pad body 1 and the control system.

[0009] Furthermore, the sensing device is arranged inside and / or at the upper end and / or at the lower end of the sensing pad body.

[0010] Furthermore, the sensing pad includes an inner lining and an outer covering, and the sensing device is arranged inside and / or on the upper surface and / or on the lower surface of the inner lining.

[0011] An electric wheelchair comprises a mounting frame and the sensing pad, wherein the sensing pad is arranged on the mounting frame.

[0012] Furthermore, the sensing device is arranged between the sensing pad body and the mounting frame.

[0013] Furthermore, the sensing device is fixed to the sensing pad body and / or the mounting frame through a fixing layer.

[0014] In summary, the utility model is beneficial in that:

[0015] 1) The utility model uses the structure of shutting down the sensing device control module through the sensing device switch, so that the control system includes pressure-sensitive control for controlling the opening and closing of the drive motor through the feedback signal of the sensing device and backup control for directly controlling the drive motor by the controller in the event of failure of the sensing device, which effectively improves the safe, continuous and stable operation of the control system.

[0016] 2) In the present invention, when the wheelchair is unoccupied, if the wheelchair is operated, the controller will control the alarm module to generate an alarm to remind the user.

[0017] 3) The utility model connects the switch module with the sensing device control module. When the sensing device switch is turned on, if the wheelchair is unoccupied for a long time, the switch module automatically shuts down the control system to avoid the problem of the user forgetting to shut down the wheelchair, thereby improving the practicality and safety of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a circuit block diagram of the control system of the utility model.

[0019] Figure 2 It is an exploded schematic diagram of the sensing pad, sensing device and fixing layer of the utility model. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0022] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, a control system includes a power supply, a controller, a sensing device, a sensing device switch and a driving motor, and the power supply is connected to the controller.

[0026] The driving motor is the power source of the vehicle to be driven, and the vehicle to be driven may be a wheelchair, a truck, etc. This embodiment is described by taking a wheelchair as an example.

[0027] The controller is used to control the operation of each module, receive, process and output signals; the sensing device and the drive motor are connected to the controller respectively. When the sensing device detects an object above, the sensing device generates a feedback signal and transmits the feedback signal to the controller. The controller outputs a drive signal to the drive motor, and the drive motor controls the movement of the wheelchair.

[0028] The controller includes a motor operation control module and a sensing device control module. The sensing device is connected to the sensing device control module, the sensing device control module is connected to the motor operation control module, the drive motor is connected to the motor operation control module, the motor operation control module outputs a drive signal or a brake signal to the drive motor, and the drive motor controls the operation or braking of the wheelchair; in this embodiment, the sensing device generates a feedback signal, the sensing device control module transmits the feedback signal to the motor operation control module, the motor operation control module outputs a drive signal to the drive motor, and the drive motor controls the operation of the wheelchair; the sensing device does not generate a feedback signal, the motor operation control module outputs a brake signal to the drive motor, and the drive motor controls the braking of the wheelchair; in other embodiments, the sensing device detects whether there is an object above and generates a feedback signal. When there is an object, the feedback signal is an object signal, and the motor operation control module outputs a drive signal. When there is no object, the feedback signal is a no-object signal, and the motor operation control module outputs a brake signal. The motor operation control module executes a corresponding output signal according to the object signal and the no-object signal.

[0029] The motor operation control module and the sensing device control module can be motor operation control modules and sensing device control modules with corresponding functions selected by technicians in this field from the prior art according to the above-mentioned purpose of the invention. The internal programs embedded therein are also existing software. This embodiment does not improve the internal programs, but only applies the existing motor operation control module, the sensing device control module and their internal embedded programs.

[0030] The motor operation control module may use a control joystick or a control button, and manually drive the control joystick or the control button to output a signal to the drive motor. The motor operation control module of this embodiment is not limited thereto.

[0031] The sensing device adopts a pressure-responsive membrane switch or / and a resistive pressure sensor or / and a beam-beam photoelectric switch. When the sensing device adopts a pressure-responsive membrane switch or / and a resistive pressure sensor, the feedback signal is a pressure signal, that is, the sensing device detects the pressure, converts the pressure into a pressure signal, and transmits the pressure signal to the sensing device control module. When the sensing device adopts a beam-beam photoelectric switch, when the sensing device detects that there is no object above, the light emitting end and the light receiving end of the beam-beam photoelectric switch emit infrared sensing light to the light receiving end for reception. When the sensing device detects that there is an object above, the light receiving end will not receive the infrared sensing light, and the sensing device generates a feedback signal.

[0032] The sensing device switch is located between the sensing device control module and the motor operation control module, and is connected to the sensing device control module and the motor operation control module. The sensing device switch shuts down the sensing device control module, and the motor operation control module outputs a driving signal or a braking signal to the driving motor to control the operation or braking of the wheelchair. This can be specifically achieved through an existing relay or an existing selection circuit. When the sensing device switch adopts a relay, utilizing the relay's attraction and release switching circuit is a routine operation for those skilled in the art and will not be elaborated here. Therefore, when a problem occurs with the sensing device, the motor operation control module controls the driving motor to serve as a backup, and the driving motor can still operate normally, effectively improving the safe, continuous and stable operation of the control system.

[0033] The control system includes two circuits for controlling the drive motor, namely a pressure-sensing control circuit that controls the opening and closing of the drive motor through the feedback signal of the sensing device, and a backup control circuit that directly uses the controller to control the drive motor when the sensing device fails. The switching between the pressure-sensing control circuit and the backup control circuit is controlled by the opening and closing of the sensing device switch, which effectively improves the safe, continuous and stable operation of the control system.

[0034] The control system also includes an alarm module, which is connected to the controller. When the sensing device does not detect an object above, the sensing device will not generate a feedback signal, and the controller will not receive the feedback signal. At this time, when the wheelchair is operated, the controller controls the alarm module to generate an alarm to remind the user. The alarm module may include a buzzer and / or an indicator light, etc. The buzzer generates an alarm sound and the indicator light flashes to warn.

[0035] The control system also includes a switch module, which controls the power on and off of the control system. The sensing device control module is connected to the switch module, and the sensing device control module transmits a feedback signal to the switch module. The switch module is preset with a timed shutdown threshold. When the sensing device switch is turned on, the switch module exceeds the timed shutdown threshold and does not receive the feedback signal transmitted by the sensing device control module, indicating that there is no object above the sensing device for a long time. The switch module will shut down the control system. When the control system needs to be started, the switch module will turn on the control system.

[0036] The power supply supplies power to the controller, the sensing device, the sensing device switch, the drive motor, the alarm module and the switch module.

[0037] The connection of the above components adopts the existing wired method, and can also be a wireless method, such as Bluetooth connection and WiFi connection. This embodiment does not limit the connection method as long as the above functional structure can be achieved.

[0038] The control system of this embodiment is not limited to application to wheelchairs, but can also be applied to other equipment, such as seats, cargo carts, etc.

[0039] like Figure 2 As shown, a sensing pad comprises a sensing pad body 1 and the above control system, wherein at least a sensing device 2 is arranged on the sensing pad body 1 , and the sensing device 2 detects whether there is an object above the sensing pad body 1 .

[0040] The sensing device 2 is disposed inside and / or at the upper end and / or the lower end of the sensing pad body 1. Generally speaking, considering factors such as safety and service life, the sensing device 2 is not exposed to the air. The upper end and the lower end referred to in this embodiment refer to positions close to the upper and lower surfaces of the sensing pad body 1, or an isolation layer may be disposed above the sensing device 2 to isolate the sensing device 2 from being directly exposed to the air.

[0041] The sensing device 2 can be installed inside and / or on the upper end and / or on the lower end of the sensing pad body 1 through the fixing layer 3. The fixing layer 3 is configured as adhesive, Velcro, etc.

[0042] The sensing pad body 1 is configured as a seat cushion and / or a back cushion and / or a foot pad.

[0043] When the sensing pad body 1 is set as a seat cushion and / or a back cushion, the sensing pad includes an inner lining and an outer cover. The inner lining is arranged inside the outer cover, and the outer cover protects the inner lining. The sensing device 2 is arranged inside and / or on the upper surface and / or lower surface of the inner lining.

[0044] The sensing device 2 does not detect that the user is sitting on the sensing pad. If the pressure detected by the sensing device 2 does not reach the pressure index, the sensing device 2 will not generate a feedback signal, for example, when a light object is placed on the sensing pad; when no one is sitting on the sensing pad, the pressure detected by the sensing device 2 does not reach the pressure index, and the sensing device 2 does not generate a feedback signal. At this time, the motor operation control module does not receive the feedback signal, and the drive motor does not start. When someone is sitting on the sensing pad, the sensing pad bears the weight of the human body, the sensing device 2 detects the pressure, and the pressure reaches the pressure index. The sensing device 2 generates a feedback signal. The sensing device 2 is provided with a transmission wire 4. The sensing device 2 transmits the feedback signal to the sensing device control module through the transmission wire 4. The sensing device control module transmits the drive motor startable signal to the motor operation control module, and the drive motor controls the wheelchair to start running.

[0045] The lining is made of sponge, latex, down, etc.

[0046] An electric wheelchair comprises the above-mentioned induction pad, which is mounted on a mounting frame of the electric wheelchair. This embodiment can prevent the wheelchair from starting by mistake through a control system, thereby solving the problem of accidents caused by the wheelchair starting by mistake. By setting the control system as a pressure-sensing control circuit that controls the opening and closing of a drive motor through a feedback signal of a sensing device 2 and directly using a controller to control a backup control circuit for the drive motor when the sensing device 2 fails, the safe, continuous and stable operation of the wheelchair is effectively improved.

[0047] The electric wheelchair of the present application uses a structure that shuts down the sensing device control module through the sensing device switch, so that the control system includes a pressure sensing control circuit that controls the start and stop of the drive motor through the feedback signal of the sensing device, and a backup control circuit that directly uses the controller to control the drive motor in the event of failure of the sensing device, which effectively improves the safe, continuous and stable operation of the control system.

[0048] When the electric wheelchair of the present application is not occupied, if the wheelchair is operated, the controller will control the alarm module to generate an alarm to remind the user.

[0049] The electric wheelchair of the present application connects the switch module to the sensing device control module. When the sensing device switch is turned on, if the wheelchair is unoccupied for a long time, the switch module automatically shuts down the control system to avoid the problem of the user forgetting to shut down, thereby improving the practicality and safety of the wheelchair.

[0050] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A control system, characterized in that: It includes a power supply, a controller, a sensing device and a driving motor. The power supply is connected to the controller. The controller includes a motor operation control module and a sensing device control module. The sensing device is connected to the sensing device control module. The sensing device control module is connected to the motor operation control module. The driving motor is connected to the motor operation control module. It also includes a sensing device switch. The control system includes a pressure sensing control circuit composed of the sensing device, the sensing device control module, the motor operation control module and the driving motor, and a backup control circuit composed of the motor operation control module and the driving motor. The sensing device switch is connected to the sensing device control module and the motor operation control module. The sensing device switch switches the pressure sensing control circuit and the backup control circuit.

2. A control system according to claim 1, characterized in that: It also includes an alarm module, which is connected to the controller.

3. A control system according to claim 1, characterized in that: It also includes a switch module, the sensing device control module is connected to the switch module, and the switch module controls the on / off of the control system.

4. A sensor pad, characterized in that: The invention comprises a sensing pad body and a control system according to any one of claims 1 to 3.

5. The sensor pad according to claim 4, characterized in that: The sensing device is arranged inside and / or at the upper end and / or at the lower end of the sensing pad body.

6. The sensor pad according to claim 5, characterized in that: The sensing pad comprises an inner lining and an outer covering, and the sensing device is arranged inside and / or on the upper surface and / or on the lower surface of the inner lining.

7. An electric wheelchair, characterized in that: The invention comprises a mounting frame and the sensing pad according to any one of claims 5 to 6, wherein the sensing pad is arranged on the mounting frame.

8. An electric wheelchair according to claim 7, characterized in that: The sensing device is arranged between the sensing pad body and the mounting frame.

9. An electric wheelchair according to claim 4 or 8, characterized in that: The sensing device is fixed to the sensing pad body and / or the mounting frame through a fixing layer.

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