Test tool for PCB (printed circuit board) of hydrodynamic therapy equipment

Abstract

The utility model provides a test tool for a PCB of hydrodynamic therapy equipment, and relates to the technical field of test tools. The tool comprises a control switch, a main control chip, a power supply circuit and a motor control circuit. The power supply circuit is connected with the main control chip, and the motor control circuit is connected with the main control chip; the control switch comprises a power supply fault simulation switch and a motor fault simulation switch, and the power supply fault simulation switch is connected with a first trigger pin of the main control chip and is used for controlling on-off of a power supply circuit; and the motor fault analog switch is connected with the second trigger pin of the main control chip and is used for controlling the on-off of the motor control circuit. The tool can simulate the condition of a power supply fault or a motor fault, wires do not need to be dismounted frequently, and the operation process is simple.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and more specifically, to a testing tooling for a PCB board of a hydrodynamic therapy device. Background Technology

[0002] The existing technical solution for testing water jet power boards involves mounting the PCB board onto a pre-assembled host computer, then powering it on and manually testing its various parameters. For example, when the PCB board needs to detect a power failure alarm, the existing method simulates a power failure by disconnecting the 240V power supply line inside the power supply; when detecting a motor failure (pressure over-limit) alarm, the existing method simulates a motor (pressure over-limit) failure by disconnecting the motor's three-phase power supply line or sensor line.

[0003] The current testing process requires a dedicated host computer and foot switch, as well as screws to secure the PCB board. During testing, corresponding wires need to be disconnected to simulate faults, and disconnecting high-voltage lines poses safety hazards. This requires operation by electrical professionals, and the test results are not easily understood. The entire current testing process is cumbersome, time-consuming, labor-intensive, and lacks versatility. Utility Model Content

[0004] The problem this invention aims to solve is that the existing PCB testing process is cumbersome, time-consuming, labor-intensive, and lacks versatility.

[0005] To address the aforementioned issues, in a first aspect, this utility model provides a testing fixture for a PCB board of a hydrodynamic therapy device, comprising a control switch, a main control chip, a power supply circuit, and a motor control circuit.

[0006] The power supply circuit is connected to the main control chip, and the motor control circuit is connected to the main control chip;

[0007] The control switch includes a power failure simulation switch and a motor failure simulation switch. The power failure simulation switch is connected to the first trigger pin of the main control chip and is used to control the power circuit to switch on and off. The motor failure simulation switch is connected to the second trigger pin of the main control chip and is used to control the motor control circuit to switch on and off.

[0008] Optionally, the motor control circuit includes a first switch, the fixed end of which is connected to one end interface of the Hall sensor of the brushless motor, the movable end of which is connected to the other end interface of the Hall sensor of the brushless motor, and the control end of which is connected to the main control chip.

[0009] Optionally, the power supply circuit includes a second switch, the fixed end of the second switch being connected to one end interface of the first power supply, the movable end of the second switch being connected to the other end interface of the first power supply, and the control end of the second switch being connected to the main control chip.

[0010] Optionally, the motor control circuit further includes an electronic speed controller (ESC), wherein the PWM signal output pin of the main control chip is connected to the PWM signal input pin of the ESC, the Hall signal input terminal of the ESC is used to connect to the signal output terminal of the Hall sensor of the brushless motor, the control output terminal of the ESC is connected to the brushless motor, the power fault output pin of the ESC is connected to the power fault input pin of the main control chip, and the motor fault output pin of the ESC is connected to the motor fault input pin of the main control chip.

[0011] Optionally, the test fixture for the PCB board of the hydrodynamic therapy device further includes an indicator circuit. The indicator circuit includes two indicator lights connected in parallel. One end of the two indicator lights is connected to the power supply interface of the main control chip, the other end of one indicator light is connected to the first indicator pin of the main control chip, and the other end of the other indicator light is connected to the second indicator pin of the main control chip.

[0012] Optionally, the test fixture for the PCB board of the hydrodynamic therapy device further includes a power conversion circuit, which includes a power conversion chip. The input terminal of the power conversion chip is connected to the second power supply, and the output terminal of the power conversion chip is connected to the power supply interface of the main control chip.

[0013] Optionally, when the first switch is a first relay, one end of the control coil of the first relay is connected to the power supply interface of the main control chip, and the other end of the control coil of the first relay is connected to the first control pin of the main control chip.

[0014] Optionally, when the second switch is a second relay, one end of the control coil of the second relay is connected to the power supply interface of the main control chip, and the other end of the control coil of the second relay is connected to the second control pin of the main control chip.

[0015] Optionally, the control switch further includes a start switch and a shift switch, wherein the start switch is connected to the third trigger pin of the main control chip, and the shift switch is connected to the fourth trigger pin of the main control chip.

[0016] This invention provides a testing fixture for a PCB board of a hydrodynamic therapy device. Compared with the prior art, it has the following advantages:

[0017] When the power failure simulation switch is closed, a trigger signal is transmitted to the main control chip through the corresponding pin, causing the main control chip to disconnect the power circuit. When the motor failure simulation switch is closed, a trigger signal is transmitted to the main control chip through the corresponding pin, causing the main control chip to disconnect the motor control circuit. This simulates power failure or motor failure without the need for frequent wire disconnection. The operation is simple and applicable to the testing of different PCB boards. It can test the power and motor-related circuits on different PCB boards. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A pin diagram of the main control chip provided for an embodiment of this utility model;

[0020] Figure 2 A circuit diagram of the control switch provided in an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of the Hall sensor-related parts in the motor control circuit provided in this embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the power supply circuit provided for an embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the ESC-related parts in the motor control circuit provided in this embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the indicator circuit provided in an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram of a power conversion circuit provided in an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] This application provides a test fixture for a hydrodynamic therapy device PCB board, including a control switch and a main control chip (such as...). Figure 1 (as shown), power supply circuit, motor control circuit;

[0029] The power supply circuit is connected to the main control chip, and the motor control circuit is connected to the main control chip;

[0030] like Figure 2 As shown, the control switch includes a power failure simulation switch and a motor failure simulation switch. The power failure simulation switch is connected to the first trigger pin of the main control chip and is used to control the power circuit to switch on and off. The motor failure simulation switch is connected to the second trigger pin of the main control chip and is used to control the motor control circuit to switch on and off.

[0031] In this embodiment, as Figure 2 As shown, the power failure simulation switch POWER_ERR (S3) is connected to the KEY_PWR_ERR pin (first trigger pin) of the main control chip, and the motor failure simulation switch MOTOR_ERR (S4) is connected to the KEY_MOT_ERR pin (second trigger pin) of the main control chip. The main control chip is an STC8A8K64D4 chip, which can be used as a PWM generator to generate signals that can drive the motor. The chip is powered by 5V. When the power failure simulation switch is closed, it transmits a trigger signal to the main control chip through the corresponding pin, causing the main control chip to control the power circuit to disconnect. When the motor failure simulation switch is closed, it transmits a trigger signal to the main control chip through the corresponding pin, causing the main control chip to control the motor control circuit to disconnect. This simulates either a power failure or a motor failure without frequent disconnection of wires. The operation is simple and suitable for testing different PCB boards, and can test the power and motor-related circuits on different PCB boards. In addition, one end of each switch is connected to the VCC pin, and the other end is grounded through a resistor, and the other end is also connected to the corresponding pins on the main control chip.

[0032] In optional embodiments of this application, such as Figure 3 As shown, the motor control circuit includes a first switch. The fixed end of the first switch is connected to one end interface of the Hall sensor of the brushless motor, the movable end of the first switch is connected to the other end interface of the Hall sensor of the brushless motor, and the control end of the first switch is connected to the main control chip.

[0033] Specifically, the two ends of the Hall sensor in the brushless motor are connected to interfaces J2 and J6 via leads. Interfaces J2 and J6 are respectively connected to the two ends of the first switch. The control terminal of the first switch is connected to the main control chip. When the motor fault simulation switch is closed, the main control chip is triggered through the second trigger pin. The main control chip then controls the first switch to open, thereby disconnecting the Hall sensor. For example, when the first switch is the first relay (… Figure 3 When JK1 is in the circuit, one end of the control coil of the first relay is connected to the power supply interface of the main control chip. Figure 3 The other end of the control coil of the first relay is connected to the first control pin of the main control chip (VCC). Figure 3 The Hall sensor is connected to the Hall_Driver in the circuit. The main control chip controls the control coil to switch on and off via the first control pin, thereby switching the first switch on and off, which in turn switches the Hall sensor on and off, simulating a motor (pressure over-limit) fault.

[0034] In optional embodiments of this application, such as Figure 4 As shown, the power supply circuit includes a second switch. The fixed end of the second switch is connected to one end of the interface of the first power supply, the movable end of the second switch is connected to the other end of the interface of the first power supply, and the control end of the second switch is connected to the main control chip.

[0035] Specifically, such as Figure 4 In this configuration, the two ends of the first power supply for the drive motor are connected to interfaces J3 and J7 respectively. Then, interfaces J3 and J7 are connected to the two ends of a second switch. The control terminal of the second switch is connected to the active chip. When the power failure simulation switch is closed, the first trigger pin triggers the main control chip, which then controls the second switch to open, thus disconnecting the power supply circuit. For example, when the second switch is a second relay (… Figure 4 When JK2 is in the middle, one end of the control coil of the second relay is connected to the power supply interface of the main control chip ( Figure 3 The other end of the control coil of the second relay is connected to the second control pin of the main control chip (VCC). Figure 3 The main control chip connects to the DC_Driver in the circuit. The main control chip uses the second control pin to energize and de-energize the control coil of the second switch, thus switching the second switch on and off, and consequently, the power supply circuit, simulating a power failure. The first power supply can be 240V DC to power the motor, 12V to power the Hall sensor, and 3-5V to power the digital isolation chip. High-power MOSFETs, optocouplers, or relays can be used for either the first or second switch. However, considering signal isolation and device packaging, a relay was ultimately chosen as the electronic switch to control both the 240V power supply and the Hall sensor circuit of the motor. The relay is used instead of a manually operated switch to disconnect the circuit. Figure 3 and Figure 4 As shown, in the relay drive circuit, to further enhance the drive current and the safety of the protection circuit, a transistor drive and freewheeling diode circuit are added. The collector of the transistor is connected to the other end of the control coil, the emitter of the transistor is grounded, and the base (control terminal) of the transistor is connected to the control pin and the VCC pin through a resistor respectively. The two ends of the freewheeling diode are connected to the two ends of the control coil (i.e., the freewheeling diode is connected in parallel with the control coil). The transistor can amplify the drive current, and the freewheeling diode will absorb the harmful voltage spike generated by the coil at the moment of switching of the relay.

[0036] In optional embodiments of this application, such as Figure 5 As shown, the motor control circuit also includes an electronic speed controller (ESC). The PWM signal output pin of the main control chip is connected to the PWM signal input pin of the ESC. The Hall signal input terminal of the ESC is used to connect to the signal output terminal of the Hall sensor of the brushless motor. The control output terminal of the ESC is connected to the brushless motor. The power fault output pin of the ESC is connected to the power fault input pin of the main control chip. The motor fault output pin of the ESC is connected to the motor fault input pin of the main control chip.

[0037] like Figure 5 As shown, the ESC is Figure 5 The chip (U3) in the middle, the PWM signal output pin of the main control chip ( Figure 1 Pin 10 in the middle), enable pin ( Figure 1 Pin 9), motor fault input pin ( Figure 1 Pin 8) and power failure input pin ( Figure 1 Pin 7 in the circuit is connected to the PWM signal input pin of the electronic speed controller ( Figure 5 Pin 11 in the middle), enable pin ( Figure 5 Pin 12), motor fault output pin ( Figure 5 Pin 13) and power failure output pin ( Figure 5 Pin 14) is connected to the main control chip. When the motor fails, the ESC will detect the fault and output a fault signal to the main control chip. When the power supply fails, the ESC will detect the fault and output a fault signal to the main control chip. The ESC's ability to detect faults is a capability inherent in the ESC itself.

[0038] To make it more apparent that a fault is being detected, such as Figure 6 As shown, the test fixture for the PCB board of the hydrodynamic therapy device also includes an indicator circuit. This indicator circuit comprises two parallel indicator lights, one end of which is connected to the power supply interface of the main control chip. Figure 6 The other end of an indicator light is connected to the VCC pin of the main control chip, and the other end of an indicator light is connected to the first indicator pin of the main control chip. Figure 6The other end of the LED_R is connected to the second indicator pin of the main control chip. Figure 6 Connect LED_G in the middle.

[0039] In optional embodiments of this application, such as Figure 7 As shown, the test fixture for the PCB board of the hydrodynamic therapy device also includes a power conversion circuit, which includes a power conversion chip (such as...). Figure 7 In the configuration of U2), the input terminal of the power conversion chip is connected to the second power supply (optionally a 12V power supply), and the output terminal of the power conversion chip is connected to the power supply interface of the main control chip. The second power supply is connected to interface J8, and then connected to the input terminal of the power conversion chip through interface J8. The power conversion chip converts 12V to 5V to power the main control chip or ESC.

[0040] In optional embodiments of this application, such as Figure 2 As shown, the control switch also includes a start switch (START) and a gear shift switch (GEAR). The start switch is connected to the third trigger pin (KEY_START) of the main control chip, and the gear shift switch is connected to the fourth trigger pin (KEY_GEAR) of the main control chip. Additionally, one end of each switch is grounded, and the other end is connected to the VCC pin through a resistor, and the other end is also connected to the corresponding pin in the main control chip. The push-button switches are used to control the opening and closing of relays in the power supply circuit and motor control circuit, as well as the gear shifting.

[0041] Specifically, pressing the START switch starts the operation. The main control chip sends a PWM signal to the motor via the ESC, initiating its operation. Pressing the GEAR switch then switches gears, simulating motor gear shifting. If the test passes, the green light corresponding to the LED_G pin will illuminate; if the test fails, the red light corresponding to the LED_R pin will illuminate, and the test will stop. For motor gear switching, each press of the GEAR switch can simulate a gear shift; alternatively, pressing the GEAR switch once will automatically simulate the motor switching between gears 1-10 sequentially, with each gear lasting 1 second.

[0042] Pressing the POWER_ERR switch energizes the control coil of the first relay, cutting off the 240V power supply and simulating a power failure on the PCB. If the ESC detects the fault, it sends a power failure signal to the main control chip, indicating that the test has passed and the green LED corresponding to the LED_G pin lights up; otherwise, the red LED corresponding to the LED_R pin lights up and the test stops.

[0043] Pressing the MOTOR_ERR switch energizes the control coil of the second relay, cutting off the signal line of the Hall sensor in the motor and simulating a motor fault encountered by the PCB. If the ESC detects the fault, it sends a motor fault signal to the main control chip, indicating that the test has passed, and the green light corresponding to the LED_G pin illuminates; otherwise, the red light corresponding to the LED_R pin illuminates, and the test stops. The aforementioned LED can also be replaced with other display devices, such as digital tubes, LCD displays, and touchscreens. Considering human-computer interaction and simplicity, LEDs are preferred as the display device.

[0044] In summary, compared with existing technologies, it has the following beneficial effects:

[0045] 1. The testing process is simplified. Simply place the PCB board under test onto a fixture with multiple interfaces (probes) to ensure contact between the PCB board and the probes, and then power on for testing. This saves significantly more preparation time and testing costs compared to existing solutions.

[0046] 2. Visualized test results. The final test results at each step can be clearly seen, allowing ordinary production personnel to judge the test results and reducing the difficulty of testing.

[0047] 3. Improved safety. The high-voltage lines do not need to be removed during the testing process, eliminating the risk of electric shock.

[0048] 4. Reduced testing time. The entire testing process only requires button operation and does not require power interruption or disconnection of the circuit.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A testing fixture for a PCB board of a hydrodynamic therapy device, characterized in that, This includes control switches, main control chip, power supply circuit, and motor control circuit; The power supply circuit is connected to the main control chip, and the motor control circuit is connected to the main control chip; The control switch includes a power failure simulation switch and a motor failure simulation switch. The power failure simulation switch is connected to the first trigger pin of the main control chip and is used to control the power circuit to switch on and off. The motor failure simulation switch is connected to the second trigger pin of the main control chip and is used to control the motor control circuit to switch on and off.

2. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, The motor control circuit includes a first switch, the fixed end of which is connected to one end interface of the Hall sensor of the brushless motor, the movable end of which is connected to the other end interface of the Hall sensor of the brushless motor, and the control end of which is connected to the main control chip.

3. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, The power supply circuit includes a second switch, the fixed end of which is connected to one end of the interface of the first power supply, the movable end of which is connected to the other end of the interface of the first power supply, and the control end of which is connected to the main control chip.

4. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, The motor control circuit also includes an electronic speed controller (ESC). The PWM signal output pin of the main control chip is connected to the PWM signal input pin of the ESC. The Hall signal input terminal of the ESC is used to connect to the signal output terminal of the Hall sensor of the brushless motor. The control output terminal of the ESC is connected to the brushless motor. The power fault output pin of the ESC is connected to the power fault input pin of the main control chip. The motor fault output pin of the ESC is connected to the motor fault input pin of the main control chip.

5. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, It also includes an indicator circuit, which includes two indicator lights connected in parallel. One end of the two indicator lights is connected to the power supply interface of the main control chip, the other end of one indicator light is connected to the first indicator pin of the main control chip, and the other end of the other indicator light is connected to the second indicator pin of the main control chip.

6. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, It also includes a power conversion circuit, which includes a power conversion chip. The input terminal of the power conversion chip is connected to a second power source, and the output terminal of the power conversion chip is connected to the power supply interface of the main control chip.

7. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 2, characterized in that, When the first switch is a first relay, one end of the control coil of the first relay is connected to the power supply interface of the main control chip, and the other end of the control coil of the first relay is connected to the first control pin of the main control chip.

8. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 3, characterized in that, When the second switch is a second relay, one end of the control coil of the second relay is connected to the power supply interface of the main control chip, and the other end of the control coil of the second relay is connected to the second control pin of the main control chip.

9. The testing fixture for the PCB board of the hydrodynamic therapy device as described in claim 1, characterized in that, The control switch also includes a start switch and a shift switch. The start switch is connected to the third trigger pin of the main control chip, and the shift switch is connected to the fourth trigger pin of the main control chip.

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