Massage control system of wheelchair

Abstract

The utility model relates to a wheelchair massage control system which comprises a plurality of air bags, a plurality of valve bodies, an air pump, an air pump control circuit, a valve path control circuit, an MCU main control circuit, a transceiver circuit and a power circuit which are arranged in a wheelchair, the air pump control circuit is used for controlling the air pump to work, the valve path control circuit is used for controlling the valve bodies, and the MCU main control circuit is used for controlling the valve bodies. The MCU main control circuit is used for being in communication connection with external equipment through the transceiver circuit and is used for receiving and transmitting a control instruction so as to send out a control signal; the air pump control circuit is electrically connected with the MCU main control circuit and is used for receiving a control signal of the MCU main control circuit so as to control an air pump to work; the valve path control circuit is electrically connected with the MCU main control circuit and is used for receiving a control signal of the MCU main control circuit; and the power supply circuit is used for supplying power to the massage control system. The massage effect of the wheelchair is improved.

Description

Technical Field

[0001] The present application relates to a wheelchair, and in particular to a massage control system for a wheelchair. Background Art

[0002] Wheelchairs are mainly used by disabled people or the elderly. After sitting for a long time, they are prone to skin diseases such as bedsores. Therefore, some wheelchairs are equipped with massage systems to promote blood circulation for users and avoid skin diseases such as bedsores.

[0003] In order to realize the massage function, the existing wheelchairs usually have an external massager, but the external massager has limited massage position and massage effect, so it needs to be improved. Utility Model Content

[0004] In order to improve the massage effect of a wheelchair, the present application provides a massage control system for a wheelchair.

[0005] The present application provides a wheelchair massage control system that adopts the following technical solution: a wheelchair massage control system, comprising multiple air bags, multiple valve bodies, an air pump, an air pump control circuit, a valve path control circuit, an MCU main control circuit, a transceiver circuit, and a power supply circuit built into the wheelchair, wherein the air pump control circuit is used to control the operation of the air pump, the valve path control circuit is used to control multiple valve bodies to achieve control of the inflation and deflation of each air path, the MCU main control circuit is used to communicate with an external device through the transceiver circuit, and is used to send and receive control instructions to issue control signals; the air pump control circuit is electrically connected to the MCU main control circuit, and is used to receive the control signal of the MCU main control circuit to control the operation of the air pump; the valve path control circuit is electrically connected to the MCU main control circuit, and is used to receive the control signal of the MCU main control circuit to control the inflation and deflation of each air path; the power supply circuit is used to power the massage control system.

[0006] By adopting the above technical solution, when massage is required, the MCU main control circuit receives the command signal of the external device through the transceiver circuit through the button operation on the external device. After processing, the MCU main control circuit sends a control signal to the air pump control circuit and the valve control circuit to control the operation of the air pump and the corresponding valve body, thereby charging and discharging the airbag, thereby realizing the massage action, thereby improving the massage effect of the wheelchair.

[0007] Preferably, it also includes a pump-valve power supply control circuit, which is electrically connected to the power supply circuit and is used to supply power to the air pump and the valve body; the pump-valve power supply control circuit includes a power supply chip U3, an inductor L2, a second filter circuit, and a first AD detection circuit. The signal input pin of the power supply chip U3 is electrically connected to the signal output pin of the MCU main control circuit, the power supply chip U3 is electrically connected to the power supply circuit, the output end of the power supply chip U3 is electrically connected to the inductor, and the other end of the inductor L2 is electrically connected to the second filter circuit. The first AD detection circuit and the second filter circuit are connected in parallel.

[0008] By adopting the above technical solution, the control signal of the MCU main control circuit is given to the pump-valve power control circuit, so that the power chip U3 of the pump-valve power control circuit is turned on, and the voltage of the power circuit is supplied to the air pump and the valve body after passing through the inductor L2 and the second filter circuit. Therefore, the MCU main control circuit accurately controls the opening and closing of the air pump and the valve body through the pump-valve power control circuit.

[0009] Preferably, the air pump control circuit includes a switch chip U4, a diode D2, a filter capacitor C18, a filter capacitor C19, and a second AD detection circuit. The input pin of the switch chip U4 is electrically connected to the signal output pin of the MCU main control circuit, the output pin of the switch chip U4 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to the pump valve power supply control circuit, the filter capacitor C18 and the filter capacitor C19 are connected in parallel, one end is connected to the negative electrode of the diode D2, and the other end is grounded, the negative electrode of the air pump is electrically connected between the switch chip U4 and the diode D2, and the second AD detection circuit is electrically connected between the switch chip U4 and the diode D2.

[0010] By adopting the above technical solution, the MCU main control circuit sends a control signal to the switch chip U4 of the air pump control circuit, so that the switch chip U4 is turned on, and then the pump valve power supply control circuit supplies power to the air pump, and the second AD detection circuit detects the working voltage of the air pump and gives it to the MCVU main control circuit, thereby performing short circuit and overcurrent protection.

[0011] Preferably, the valve path control circuit includes multiple valve body control circuits, and the valve body control circuit includes a field effect transistor Q3 and a pull-down resistor R7. The gate of the field effect transistor Q3 is connected to the signal output pin of the MCU main control circuit, and the source of the field effect transistor Q3 is grounded. One end of the pull-down resistor R7 is electrically connected to the gate of the field effect transistor Q3, and the other end is grounded; the drain of the field effect transistor Q3 is electrically connected to the valve body, and the other end of the valve body is electrically connected to the pump valve power supply control circuit.

[0012] By adopting the above technical solution, the MCU main control circuit controls different valve body control circuits according to different command signals, so that the field effect transistor Q3 in the valve body control circuit is turned on, so that the pump valve power supply control circuit works for the valve body, thereby stably and accurately controlling the air path corresponding to the corresponding valve body.

[0013] Preferably, an MCU power control circuit is also included, which is electrically connected to the power supply circuit and is used to supply power to the MCU main control circuit; the MCU power control circuit includes a switching circuit and a power supply circuit, and the switching circuit is electrically connected to the transceiver circuit and is used to detect whether there is an instruction signal input, the output end of the switching circuit is electrically connected to the power supply circuit, and the power supply circuit is electrically connected to the power supply circuit, and the switching circuit responds to the instruction signal of the transceiver circuit to control the power supply circuit and the power supply circuit to be conductive.

[0014] By adopting the above technical solution, after the switch circuit detects the presence of a command signal, the switch circuit connects the power circuit and the power supply circuit, so that the power supply circuit supplies power to the MCU main control circuit and enters the working state. When there is no command signal, the MCU main control circuit enters the power saving state.

[0015] Preferably, a voltage detection circuit is also included, the input end of the voltage detection circuit is electrically connected to the MCU power control circuit, and the output end of the voltage detection circuit is connected to the input end of the MCU main control circuit, for detecting the input power so that the MCU main control circuit can be protected from overvoltage or low voltage.

[0016] By adopting the above technical solution, the voltage detection circuit detects the voltage level input by the main control chip and sends the signal to the MCU main control circuit, and the MCU main control circuit performs overvoltage or undervoltage protection according to the voltage level.

[0017] Preferably, an AD key detection circuit is also included, which includes a resistor R42, a capacitor C53, a switch tube Q4, a voltage regulator tube TVS3, a resistor R36, a resistor R37, and a capacitor C52. One end of the resistor R42 is connected to an external device, and the other end of the resistor R42 is connected to the drain of the switch tube Q4. The gate of the switch tube Q4 is connected to the enable end of the MCU main control circuit. The source of the switch tube Q4 is connected to the signal input end of the MCU main control circuit through the resistor R37. The negative pole of the voltage regulator tube TVS3 is electrically connected to the source of the switch tube Q4, and the positive pole of the voltage regulator tube TVS3 is grounded; one end of the resistor R36 is connected to the gate of the switch tube Q4, and the other end is connected to the source of the switch tube Q4.

[0018] By adopting the above technical solution, different buttons correspond to different voltages. Therefore, the voltage detected by the AD button detection circuit is input into the MCU main control circuit to determine the massage function corresponding to the button. Therefore, the functions and states corresponding to multiple buttons can be detected through one line.

[0019] Preferably, an airbag pressure detection circuit is also included, which includes a pressure detection chip U5, a transistor Q5, and a resistor R21. One end of the resistor R21 is connected to the enable end of the MCU main control circuit, and the other end of the resistor R21 is electrically connected to the base of the transistor Q5. The collector of the transistor Q5 is electrically connected to the power supply, and the emitter of the transistor Q5 is connected to the pressure detection chip U5. The signal input end of the pressure detection chip U5 is electrically connected to the input pin of the MCU main control circuit.

[0020] By adopting the above technical solution, the pressure detection chip U5 detects the pressure signal of the airbag and sends it to the MCU main control circuit, and the MCU main control circuit determines the pressure state of the airbag, thereby preventing the airbag from overfilling.

[0021] Preferably, the airbags include base airbags, lumbar support airbags, and shoulder airbags. The base airbags are arranged at the base and base side wings of the wheelchair, the lumbar support airbags are arranged at the lumbar support and lumbar support side wings, and the shoulder airbags are arranged at the shoulder support position.

[0022] By adopting the above technical solution, the massage control system controls the airbags distributed on the base and side wings of the wheelchair, the lumbar support and side wings of the lumbar support, and the shoulder support positions, so that the airbags on the wheelchair can massage multiple parts of the body, thereby improving the massage effect of the wheelchair.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] When massage is required, the MCU main control circuit receives the command signal of the external device through the transceiver circuit through the button operation on the external device. After processing, the MCU main control circuit sends a control signal to the air pump control circuit and the valve control circuit to control the air pump and the corresponding valve body, thereby charging and discharging the airbag, thereby realizing the massage action, thereby improving the massage effect of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a principle block diagram of the massage control system in the embodiment of the present application.

[0026] Figure 2 1 is a circuit schematic diagram of the power supply circuit and the transceiver circuit in the embodiment of the present application.

[0027] Figure 3 It is a circuit diagram of the MCU main control circuit in the embodiment of the present application.

[0028] Figure 4 It is a circuit schematic diagram of the MCU power control circuit in the embodiment of the present application.

[0029] Figure 5 It is a circuit schematic diagram of the pump valve power supply control circuit in the embodiment of the present application.

[0030] Figure 6 1 is a circuit diagram of the air pump control circuit in the embodiment of the present application.

[0031] Figure 7 1 is a circuit diagram of the valve control circuit in the embodiment of the present application.

[0032] Figure 8 It is a circuit schematic diagram of the AD button detection circuit and the airbag pressure detection circuit in the embodiment of the present application.

[0033] Figure 9 It is a structural diagram of the installation position of the airbag on the wheelchair in an embodiment of the present application.

[0034] Explanation of the accompanying drawings: 1. airbag; 11. base airbag; 12. lumbar airbag; 13. shoulder airbag; 2. valve body; 3. air pump; 4. MCU main control circuit; 41. AD button detection circuit; 42. airbag pressure detection circuit; 5. air pump control circuit; 51. second AD detection circuit; 6. valve control circuit; 61. valve body control circuit; 7. transceiver circuit; 71. external device; 8. power supply circuit; 81. MCU power supply control circuit; 811. switch circuit; 812. power supply circuit; 813. voltage detection circuit; 82. pump valve power supply control circuit; 821. second filter circuit; 822. first AD detection circuit; 83. first filter circuit; 9. wheelchair. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-9 This application is described in further detail.

[0036] The present application embodiment discloses a massage control system for a wheelchair. Figure 1The massage control system includes multiple air bags 1, multiple valve bodies 2, an air pump 3, an MCU main control circuit 4, an air pump control circuit 5, a valve circuit control circuit 6, a transceiver circuit 7, and a power supply circuit 8. The multiple valve bodies 2 are connected to each air bag 1 through an air circuit. The air pump 3 controls the operation of different valve bodies 2 through the valve circuit control circuit 6 to switch different air circuits and inflate or deflate the corresponding air bags 1. The air pump control circuit 5 is used to control the operation of the air pump 3, and the valve circuit control circuit 6 is used to control the multiple valve bodies 2 to control the inflation or deflation of each air circuit. The MCU main control circuit 4 is used to communicate with an external device 71 through the transceiver circuit 7 to send and receive control instructions to issue control signals; the air pump control circuit 5 is electrically connected to the MCU main control circuit 4 to receive control signals from the MCU main control circuit 4 to control the operation of the air pump 3; the valve circuit control circuit 6 is electrically connected to the MCU main control circuit 4 to receive control signals from the MCU main control circuit 4 to control the inflation or deflation of each air circuit; and the power supply circuit 8 is used to power the massage control system.

[0037] Reference Figure 1 and Figure 2 Specifically, the transceiver circuit 7 is a TJA1021 Lin transceiver, and the external device 71, the transceiver circuit 7, the air pump 3, the valve body 2, and the power supply circuit 8 are connected via a connector P1. The RXD pin of the transceiver circuit 7 is electrically connected to the MCU main control circuit 4 for receiving a command signal from the external device 71, wherein the external device 71 may be a key controller. The power supply circuit 8 includes a diode D1, an inductor L1, a voltage regulator diode TVS1, and a first filter circuit 83. The positive electrode of the diode D1 is connected to the connector P1, the negative electrode of the diode D1 is electrically connected to one end of the inductor L1, and the other end of the inductor L1 is electrically connected to the first filter circuit 83. The voltage regulator diode TVS1 is connected in parallel to the first filter circuit 83. The power supply circuit 8 converts AC power into a stable DC power supply.

[0038] Reference Figure 3 and Figure 4 The power supply circuit 8 is electrically connected to the MCU power supply control circuit 81, which is used to control the power supply to the MCU main control circuit 4; the MCU power supply control circuit 81 includes a switching circuit 811 and a power supply circuit 812. The switching circuit 811 is electrically connected to the transceiver circuit 7 for detecting whether there is an instruction signal input. The output end of the switching circuit 811 is electrically connected to the power supply circuit 812, and the power supply circuit 812 is electrically connected to the power supply circuit 8. The switching circuit 811 responds to the instruction signal of the transceiver circuit 7 to control the power supply circuit 812 to be conductive with the power supply circuit 8.

[0039] Specifically, the switch circuit 811 detects the key signal or the signal of the transceiver circuit 7, thereby turning on the transistor Q1 in the switch circuit 811, thereby turning on the power supply circuit 8 and the power supply circuit 812. The power supply circuit 812 is stabilized by the filter circuit and the voltage regulator ZD1 to output a stable 5V to power the MCU main control circuit 4, thereby controlling the power supply of the MCU main control circuit 4 to enter the working state. When there is no command signal, the MCU main control circuit 4 enters the power saving state.

[0040] The MCU power control circuit 81 is electrically connected to a voltage detection circuit 813 , the output end of the voltage detection circuit 813 is connected to the input end of the MCU main control circuit 4 for detecting the input power so as to provide overvoltage or low voltage protection for the MCU main control circuit 4 .

[0041] Reference Figure 1 and Figure 5 , further comprising a pump-valve power supply control circuit 82, which is electrically connected to the power supply circuit 8 and is used to control the power supply to the air pump 3 and the valve body 2. The pump-valve power supply control circuit 82 includes a power supply chip U3, an inductor L2, a second filter circuit 821, and a first AD detection circuit 822. The signal input pin of the power supply chip U3 is electrically connected to the signal output pin of the MCU main control circuit 4. The power supply chip U3 is electrically connected to the power supply circuit 8, and the output end of the power supply chip U3 is electrically connected to the inductor L2. The other end of the inductor L2 is electrically connected to the second filter circuit 821. The first AD detection circuit 822 and the second filter circuit 821 are connected in parallel. The control signal from the MCU main control circuit 4 is provided to the pump-valve power supply control circuit 82, thereby turning on the power supply chip U3 of the pump-valve power supply control circuit 82. The voltage of the power supply circuit 8 is supplied to the air pump 3 and the valve body 2 after passing through the inductor L2 and the second filter circuit 821. Therefore, the MCU main control circuit 4 accurately controls the opening and closing of the air pump 3 and the valve body 2 through the pump-valve power supply control circuit 82. The model of the power chip U3 in this application is ZXMS81200SPQ.

[0042] Reference Figure 1 and Figure 6The air pump control circuit 5 includes a switch chip U4, a diode D2, a filter capacitor C18, a filter capacitor C19, and a second AD detection circuit 51. The input pin of the switch chip U4 is electrically connected to the signal output pin of the MCU main control circuit 4. The output pin of the switch chip U4 is connected to the anode of the diode D2. The cathode of the diode D2 is connected to the pump-valve power supply control circuit 82. The filter capacitors C18 and C19 are connected in parallel, with one end connected to the cathode of the diode D2 and the other end grounded. The MCU main control circuit 4 sends a control signal to the switch chip U4 of the air pump control circuit 5, thereby turning on the switch chip U4, which in turn causes the pump-valve power supply control circuit 82 to supply power to the air pump 3. The negative electrode of the air pump 3 is electrically connected between the switch chip U4 and the diode D2. The second AD detection circuit 51 is electrically connected between the switch chip U4 and the diode D2 and is used to detect the voltage input to the air pump 3, thereby providing a signal to the MCU main control circuit 4. The MCU main control circuit 4 and the switch chip U4 provide short-circuit and overcurrent protection for the air pump 3. The model of the switch chip U4 in this application is ZXMS6004N8Q.

[0043] Reference Figure 1 and Figure 7 The valve circuit control circuit 6 includes multiple valve body control circuits 61, each of which controls the on / off of the air path of a corresponding airbag 1. The valve body control circuit 61 includes a field effect transistor Q3, a pull-down resistor R7, a capacitor C6, a capacitor C32, a capacitor C28, and a diode D3. The gate of the field effect transistor Q3 is connected to the signal output pin of the MCU main control circuit 4, and the source of the field effect transistor Q3 is grounded. One end of the pull-down resistor R7 is electrically connected to the gate of the field effect transistor Q3, and the other end is grounded. The drain of the field effect transistor Q3 is electrically connected to the valve body 2, and the other end of the valve body 2 is electrically connected to the pump valve power supply control circuit 82. The MCU main control circuit 4 controls the corresponding valve body control circuit 61 according to different command signals, thereby turning on the field effect transistor Q3 in the valve body control circuit 61, which in turn causes the pump valve power supply control circuit 82 to operate the valve body 2, thereby stably and accurately controlling the on / off of the air path corresponding to the airbag 1.

[0044] Reference Figure 1 and Figure 8, further comprising an AD key detection circuit 41, which includes a resistor R42, a capacitor C53, a switch tube Q4, a voltage regulator tube TVS3, a resistor R36, a resistor R37, and a capacitor C52. One end of the resistor R42 is connected to the external device 71 to input the key signal of the external device 71. The other end of the resistor R42 is connected to the drain of the switch tube Q4. The gate of the switch tube Q4 is connected to the enable terminal of the MCU main control circuit 4. The source of the switch tube Q4 is connected to the signal input terminal of the MCU main control circuit 4 through the resistor R37. The cathode of the voltage regulator tube TVS3 is electrically connected to the source of the switch tube Q4, and the positive electrode of the voltage regulator tube TVS3 is grounded. One end of the resistor R36 is connected to the gate of the switch tube Q4, and the other end is connected to the source of the switch tube Q4. One end of the capacitor C52 is grounded, and the other end is connected to one end of the resistor R37.

[0045] Different buttons of the external device 71 correspond to different voltages. Therefore, the voltage detected by the AD button detection circuit 41 is input into the MCU main control circuit 4 to determine the massage function corresponding to the button. Therefore, the functions and states corresponding to multiple buttons can be detected through one line.

[0046] It also includes an airbag pressure detection circuit 42, which includes a pressure detection chip U5, a transistor Q5, and a resistor R21. One end of the resistor R21 is connected to the enable end of the MCU main control circuit 4, and the other end of the resistor R21 is electrically connected to the base of the transistor Q5. The collector of the transistor Q5 is electrically connected to the power supply, and the emitter of the transistor Q5 is connected to the pressure detection chip U5. The signal input end of the pressure detection chip U5 is electrically connected to the input pin of the MCU main control circuit 4. The pressure signal of the airbag 1 is detected by the pressure detection chip U5 and given to the MCU main control circuit 4. The pressure state of the airbag 1 is determined by the MCU main control circuit 4, thereby preventing the airbag 1 from being overcharged. The model of the pressure detection chip U5 in this application is LSPMC06-01C075.

[0047] Reference Figure 1 and Figure 9 The airbags 1 include a base airbag 11, a lumbar support airbag 12, and a shoulder airbag 13. The base airbag 11 is arranged at the base and side wings of the wheelchair 9, the lumbar support airbag 12 is arranged at the lumbar support and side wings of the wheelchair 9, and the shoulder airbag 13 is arranged at the shoulder support position of the wheelchair 9. The massage control system controls the airbags 1 distributed at the base and side wings of the wheelchair 9, the lumbar support and side wings of the lumbar support, and the shoulder support positions, so that the airbags 1 on the wheelchair 9 can massage multiple parts of the body, thereby improving the massage effect of the wheelchair 9.

[0048] The implementation principle of a massage control system for a wheelchair in an embodiment of the present application is as follows: when massage is required, the MCU main control circuit 4 receives the command signal of the external device 71 through the transceiver circuit 7 through the button operation on the external device 71. After processing, the MCU main control circuit 4 sends a control signal to the air pump control circuit 5 and the valve circuit control circuit 6 to control the operation of the air pump 3 and the corresponding valve body 2, thereby charging and discharging the airbag 1, thereby realizing the massage action, thereby improving the massage effect of the wheelchair.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A massage control system for a wheelchair, characterized in that: The wheelchair comprises a plurality of air bags (1), a plurality of valve bodies (2), an air pump (3), an air pump control circuit (5), a valve path control circuit (6), an MCU main control circuit (4), a transceiver circuit (7), and a power supply circuit (8). The air pump control circuit (5) is used to control the operation of the air pump (3); the valve path control circuit (6) is used to control the plurality of valve bodies (2) to control the inflation and deflation of each air path; the MCU main control circuit (4) is used to communicate with an external device (71) through the transceiver circuit (7) to receive and send control instructions to issue control signals; the air pump control circuit (5) is electrically connected to the MCU main control circuit (4) to receive control signals from the MCU main control circuit (4) to control the operation of the air pump (3); the valve path control circuit (6) is electrically connected to the MCU main control circuit (4) to receive control signals from the MCU main control circuit (4) to control the inflation and deflation of each air path; and the power supply circuit (8) is used to supply power to the massage control system.

2. The wheelchair massage control system according to claim 1, characterized in that: The invention also includes a pump valve power supply control circuit (82), which is electrically connected to the power supply circuit (8) and is used to supply power to the air pump (3) and the valve body (2); the pump valve power supply control circuit (82) includes a power supply chip U3, an inductor L2, a second filter circuit (821), and a first AD detection circuit (822); the signal input pin of the power supply chip U3 is electrically connected to the signal output pin of the MCU main control circuit (4); the power supply chip U3 is electrically connected to the power supply circuit (8); the output end of the power supply chip U3 is electrically connected to the inductor L2; the other end of the inductor L2 is electrically connected to the second filter circuit (821); and the first AD detection circuit (822) and the second filter circuit (821) are connected in parallel.

3. The wheelchair massage control system according to claim 2, characterized in that: The air pump control circuit (5) includes a switch chip U4, a diode D2, a filter capacitor C18, a filter capacitor C19, and a second AD detection circuit (51). The input pin of the switch chip U4 is electrically connected to the signal output pin of the MCU main control circuit (4), the output pin of the switch chip U4 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to the pump valve power supply control circuit (82), the filter capacitor C18 and the filter capacitor C19 are connected in parallel, one end is connected to the negative electrode of the diode D2, and the other end is grounded, the negative electrode of the air pump (3) is electrically connected between the switch chip U4 and the diode D2, and the second AD detection circuit (51) is electrically connected between the switch chip U4 and the diode D2.

4. The wheelchair massage control system according to claim 2, characterized in that: The valve path control circuit (6) includes a plurality of valve body control circuits (61), and the valve body control circuit (61) includes a field effect transistor Q3 and a pull-down resistor R7. The gate of the field effect transistor Q3 is connected to the signal output pin of the MCU main control circuit (4), the source of the field effect transistor Q3 is grounded, one end of the pull-down resistor R7 is electrically connected to the gate of the field effect transistor Q3, and the other end is grounded; the drain of the field effect transistor Q3 is electrically connected to the valve body (2), and the other end of the valve body (2) is electrically connected to the pump valve power supply control circuit (82).

5. The wheelchair massage control system according to claim 1, characterized in that: The invention also includes an MCU power supply control circuit (81), which is electrically connected to the power supply circuit (8) and is used to supply power to the MCU main control circuit (4); the MCU power supply control circuit (81) includes a switch circuit (811) and a power supply circuit (812), the switch circuit (811) is electrically connected to the transceiver circuit (7) and is used to detect whether a command signal is input, the output end of the switch circuit (811) is electrically connected to the power supply circuit (812), the power supply circuit (812) is electrically connected to the power supply circuit (8), and the switch circuit (811) responds to the command signal of the transceiver circuit (7) to control the power supply circuit (812) and the power supply circuit (8) to be connected.

6. The wheelchair massage control system according to claim 5, characterized in that: The device further comprises a voltage detection circuit (813), wherein the input end of the voltage detection circuit (813) is electrically connected to the MCU power control circuit (81), and the output end of the voltage detection circuit (813) is connected to the input end of the MCU main control circuit (4), and is used to detect the input power so as to enable the MCU main control circuit (4) to perform overvoltage or low voltage protection.

7. The wheelchair massage control system according to claim 1, characterized in that: The AD key detection circuit (41) is also included. The AD key detection circuit (41) includes a resistor R42, a capacitor C53, a switch tube Q4, a voltage regulator tube TVS3, a resistor R36, a resistor R37, and a capacitor C52. One end of the resistor R42 is connected to an external device, and the other end of the resistor R42 is connected to the drain of the switch tube Q4. The gate of the switch tube Q4 is connected to the enable end of the MCU main control circuit (4). The source of the switch tube Q4 is connected to the signal input end of the MCU main control circuit (4) through the resistor R37. The negative electrode of the voltage regulator tube TVS3 is electrically connected to the source of the switch tube Q4, and the positive electrode of the voltage regulator tube TVS3 is grounded. One end of the resistor R36 is connected to the gate of the switch tube Q4, and the other end is connected to the source of the switch tube Q4.

8. The wheelchair massage control system according to claim 1, characterized in that: The airbag pressure detection circuit (42) is also included. The airbag pressure detection circuit (42) includes a pressure detection chip U5, a transistor Q5, and a resistor R21. One end of the resistor R21 is connected to the enable end of the MCU main control circuit (4), and the other end of the resistor R21 is electrically connected to the base of the transistor Q5. The collector of the transistor Q5 is electrically connected to the power supply. The emitter of the transistor Q5 is connected to the pressure detection chip U5. The signal input end of the pressure detection chip U5 is electrically connected to the input pin of the MCU main control circuit (4).

9. The wheelchair massage control system according to claim 1, characterized in that: The multiple airbags (1) include a base airbag (11), a waist support airbag (12), and a shoulder airbag (13). The base airbag (11) is arranged at the base and the base side wings of the wheelchair (9), the waist support airbag (12) is arranged at the waist support and the waist support side wings, and the shoulder airbag (13) is arranged at the shoulder support position.

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