Motor control state detection device of stepping motor control panel

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The detection device, which combines a display screen and photoelectric sensors, solves the problem of low detection efficiency of stepper motor control boards and achieves efficient and accurate speed and forward/reverse control detection.

CN224176912UActive Publication Date: 2026-04-28AUTOBIO LABTEC INSTR CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: AUTOBIO LABTEC INSTR CO LTD
Filing Date: 2025-06-18
Publication Date: 2026-04-28

AI Technical Summary

Technical Problem

Existing stepper motor control boards have low detection efficiency, are prone to errors, and cannot efficiently detect the forward/reverse control and speed control accuracy of the motor.

Method used

It employs a combination of a display screen, a bracket unit, a stepper motor unit, a detection circuit unit, and a power supply unit. It uses a through-beam slotted photoelectric sensor and a microprocessor to calculate the motor speed and rotation status, and displays the results on an LCD screen.

Benefits of technology

It improves the detection efficiency and accuracy of the stepper motor control board, enabling efficient detection of the speed and forward/reverse control of multiple stepper motor loads.

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Abstract

The utility model discloses a motor control state detection device of a stepping motor control panel. The motor control state detection device comprises a display screen and a frame body, a bracket unit, a stepping motor unit, a detection circuit unit and a power supply unit are arranged on the frame body; the bracket unit comprises a supporting plate provided with a plurality of telescopic ejector pin contacts, and the telescopic ejector pin contacts are electrically connected with the corresponding stepping motor control panel to be detected, the detection circuit unit, the display and the power supply unit respectively; the stepping motor unit comprises a stepping motor, a disc and at least two correlation type groove-shaped photoelectric sensors, wherein the edge of the disc is provided with a notch. The disc is fixedly sleeved on a shaft of the stepping motor, and the edge of the disc is located in a notch of each correlation groove type photoelectric sensor. According to the utility model, the defects that the detection efficiency is low when the stepping motor control panel is detected, errors are easily caused by human eye observation of inspectors, and the rotating speed of the motor cannot be detected are overcome; especially when one stepping motor control panel controls the load of multiple stepping motors, the detection efficiency is high and especially prominent.

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Description

Technical Field

[0001] This utility model relates to a stepper motor control device, and more particularly to a motor control status detection device for a stepper motor control board. Background Technology

[0002] Existing stepper motor testing fixtures are mostly used to test the performance of stepper motors, but performance testing of stepper motor control boards (controllers), such as speed control accuracy and forward / reverse control verification, is still relatively rare. Typically, the control board is placed on a testing fixture, powered on, and used to control one stepper motor. Inspectors then visually observe the motor's operating status to test the stepper motor control board. However, when testing multiple stepper motors controlled by a single control board, visual observation is obviously inefficient and prone to omissions or errors. Furthermore, this testing method can only detect the basic operating status of the motor and cannot verify the accuracy of forward / reverse control and speed control, hindering high-efficiency and high-precision testing of stepper motor control boards. Summary of the Invention

[0003] In view of this, the present invention provides a motor control status detection device for a stepper motor control board, so as to improve the detection efficiency and accuracy of the stepper motor control board.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The motor control status detection device for the stepper motor control board of this utility model includes a display screen and a frame; the frame is provided with a bracket unit, a stepper motor unit, a detection circuit unit and a power supply unit for supporting the stepper motor control board to be tested;

[0006] The bracket unit includes a tray, on which a plurality of telescopic pin contacts are provided. The plurality of telescopic pin contacts are electrically connected to the corresponding stepper motor control board, detection circuit unit, display and power supply unit to be tested.

[0007] The stepper motor unit includes a stepper motor, a disc with notches on its edges, and at least two through-beam slotted photoelectric sensors; the disc is fixedly mounted on the motor shaft of the stepper motor, and the edge of the disc is located within the slot of each through-beam slotted photoelectric sensor.

[0008] Alternatively, the detection circuit unit includes a microprocessor MCU, optocouplers U1 and U2, and two through-beam slotted photoelectric sensors OP1 and OP2;

[0009] The first pin of the photoelectric sensor OP1 is connected to the power supply Vcc, the second pin of the photoelectric sensor OP1 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U1, and the third pin of OP1 is connected to the ground terminal GND.

[0010] The positive terminal of the LED at the input end of the optocoupler U1 is connected to the power supply Vcc via resistor R1, and its negative terminal is connected to the second pin of the photoelectric sensor OP1. The collector of the output end of the optocoupler U1 is connected to one end of resistor R3 and capacitor C1 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter of the output end of the optocoupler U1, the other end of resistor R3 and capacitor C1 are connected to the ground terminal GND.

[0011] The first pin of the photoelectric sensor OP2 is connected to the power supply Vcc, the second pin of the photoelectric sensor OP2 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U2, and the third pin of OP2 is connected to the ground terminal GND.

[0012] The positive terminal of the LED at the input end of optocoupler U2 is connected to the power supply Vcc via resistor R2, and its negative terminal is connected to the second pin of photoelectric sensor OP2. The collector of the output end of optocoupler U2 is connected to one end of resistor R4 and capacitor C2 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter of the output end of optocoupler U1, the other end of resistor R4 and capacitor C2, is connected to the ground terminal GND.

[0013] The output terminal of the microprocessor (MCU) is connected to the input terminal of the display screen.

[0014] Alternatively, the tray may be provided with clips for securing the control board of the stepper motor to be inspected.

[0015] Optionally, the power supply unit includes an AC / DC power module and a DC / DC power module. The AC / DC power module is an AC-DC power converter, and the DC / DC power module is a step-down DC power converter. The AC input terminal of the AC / DC power module is connected to the power interface provided on the frame, the DC output terminal of the AC / DC power module is connected to the input terminal of the DC / DC power module, and the output terminal of the DC / DC power module is electrically connected to the corresponding telescopic pin contacts. The DC power converted from the AC / DC power module is stepped down to 5V by the DC / DC power module to power the stepper motor control board, stepper motor unit, detection circuit unit, and display screen under test.

[0016] Alternatively, the horizontal angle between the two through-beam slotted photoelectric sensors relative to the center of the disk is 90°.

[0017] Alternatively, the display screen is disposed on the frame.

[0018] This invention solves the shortcomings of stepper motor control boards, such as low inspection efficiency, reliance on visual inspection by inspectors leading to errors, and inability to detect motor speed. Its high inspection efficiency is particularly prominent when one stepper motor control board controls multiple stepper motor loads. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a circuit diagram of the detection circuit unit described in this utility model.

[0021] Figure 3 This is a circuit block diagram of this utility model. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0023] It should be noted that in the description of this utility model, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1 As shown, the present invention includes a display screen 1 and a frame 2; the frame 1 is provided with a bracket unit for carrying the stepper motor control board to be tested, a stepper motor unit, a detection circuit unit and a power supply unit.

[0026] The bracket unit includes a tray 3, on which a plurality of telescopic ejector pin contacts 4 are provided. The plurality of telescopic ejector pin contacts 4 are electrically connected to the corresponding stepper motor control board, detection circuit unit, display 1 and power supply unit to be tested.

[0027] Advantageously or exemplary, the tray 3 is provided with a buckle 3.1 for fixing the stepper motor control board to be tested. Pressing it down can reliably establish an electrical connection between the test point of the circuit board under test and the telescopic pin contact 4.

[0028] Advantageously or exemplaryly, the display screen 1 is selected as a 128x64 dot matrix liquid crystal display screen, and the display screen 1 is fixed to the upper part of the frame 2 for easy observation and transportation.

[0029] The stepper motor unit includes multiple stepper motors (hidden in the figure) fixed inside the frame 2. The model and quantity of the stepper motors are determined according to the design requirements.

[0030] Each stepper motor has a metal disc 6 with a notch 5 on its edge fixedly mounted on its motor shaft. Two through-beam slotted photoelectric sensors 7.1 and 7.2 are respectively set on the frame 2 at the edge of each disc. The edge of the disc 6 is located in the slot of each through-beam slotted photoelectric sensor 7.1 and 7.2.

[0031] Beneficially or exemplaryly, the horizontal angle between the two through-beam slotted photoelectric sensors 7.1 and 7.2 relative to the center of the disk 6 is 90°. This is to better form the time difference between the triggering of the two through-beam slotted photoelectric sensors 7.1 and 7.2, which is beneficial for calculating the forward and reverse rotation of the stepper motor through the algorithm.

[0032] like Figure 1 , 3 As shown, the power supply unit includes an AC / DC power module 8 and a DC / DC power module 9. The AC / DC power module 8 is an AC-DC power converter, and the DC / DC power module 9 is a step-down DC power converter. The AC input terminal of the AC / DC power module 8 is connected to the input terminal of the power switch 10 set on the frame 2 via a wire. The output terminal of the power switch 10 is connected to the triangular power interface 11. The DC output terminal of the AC / DC power module 8 is connected to the input terminal of the DC / DC power module 9. The output terminal of the DC / DC power module 9 is electrically connected to the corresponding telescopic pin contact 4. The DC power converted from the AC / DC power module 8 is stepped down to 5V by the DC / DC power module 9 to power the stepper motor control board, stepper motor unit, detection circuit unit, and display screen 1 under test.

[0033] Beneficially or exemplaryly, such as Figure 2 , 3 As shown, the detection circuit unit includes a microprocessor MCU (model GD32F103RBT6), optocoupler U1 (model TLP2395), optocoupler U2 (model TLP2395), and two through-beam slotted photoelectric sensors OP1 and OP2 (model PM-L25).

[0034] Pin 1 of photoelectric sensor OP1 is connected to power supply Vcc, pin 2 of photoelectric sensor OP1 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U1, and pin 3 of OP1 is connected to ground terminal GND.

[0035] The positive terminal of the LED at the input end of the optocoupler U1 is connected to the power supply Vcc via resistor R1, and its negative terminal is connected to the second pin of the photoelectric sensor OP1. The collector of the output end of the optocoupler U1 is connected to one end of resistor R3 and capacitor C1 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter of the output end of the optocoupler U1, the other end of resistor R3 and capacitor C1 are connected to the ground terminal GND.

[0036] Pin 1 of photoelectric sensor OP2 is connected to power supply Vcc, pin 2 of photoelectric sensor OP2 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U2, and pin 3 of OP2 is connected to ground terminal GND.

[0037] The positive terminal of the LED at the input end of optocoupler U2 is connected to the power supply Vcc via resistor R2, and its negative terminal is connected to the second pin of photoelectric sensor OP2. The collector at the output end of optocoupler U2 is connected to one end of resistor R4 and capacitor C2 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter at the output end of optocoupler U1, the other end of resistor R4 and capacitor C2, is connected to the ground terminal GND.

[0038] The output of the microprocessor (MCU) is connected to the input of the display screen (DIS).

[0039] The working principle of this utility model is briefly described as follows:

[0040] like Figure 1 , 2 As shown in Figure 3, the stepper motor drives the disk 6 to rotate, and the through-beam slotted photoelectric sensors OP1 and OP2 detect the notch 5 on the disk 6.

[0041] When notch 5 is detected, the light-receiving sides of the through-beam slotted photoelectric sensors OP1 and OP2 are in a light-receiving state, causing pin 2 to output a high level. The LEDs at the input terminals of the through-beam slotted optocouplers U1 and U2 are turned off, causing the collector and emitter at the output terminals to also be turned off. The power supply VDD, through resistors R3 and R4, enables the microprocessor MCU to detect a high-level signal. Conversely, when notch 5 is detected, the light-receiving sides of the through-beam slotted photoelectric sensors OP1 and OP2 are in a non-light-receiving state, causing pin 2 to output a low level. The LEDs at the input terminals of the through-beam slotted optocouplers U1 and U2 are turned on, causing the collector and emitter at the output terminals to also be turned on, enabling the microprocessor MCU to detect a low-level signal. Capacitors C1 and C2 primarily filter the detection signal from the microprocessor MCU, preventing interference signals from affecting the through-beam slotted photoelectric sensor signal. Based on the detected through-beam slotted photoelectric sensor signal, the microprocessor MCU calculates the stepper motor's speed parameters and forward / reverse rotation status using a corresponding algorithm, and displays the calculated results on the LCD screen DIS.

[0042] Algorithmically, when the through-beam slotted photoelectric sensor OP1 detects notch 5, the microprocessor starts a timer and records this moment as t0. When the through-beam slotted photoelectric sensor OP2 detects notch 5, this moment is recorded as t1. When the through-beam slotted photoelectric sensor OP1 detects notch 5 again, this moment is recorded as t2. Let T1 = t1 - t0, T2 = t2 - t1. If T1 < T2, the stepper motor rotates clockwise; if T1 > T2, the stepper motor rotates counterclockwise. Let T3 = t2 - t0, then the time it takes for the stepper motor to complete one revolution can be obtained, thus calculating the stepper motor speed.

[0043] Finally, it should be emphasized that the above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor control status detection device for a stepper motor control board, comprising a display screen and a frame; characterized in that: The frame is provided with a bracket unit for carrying the stepper motor control board to be tested, a stepper motor unit, a detection circuit unit and a power supply unit; The bracket unit includes a tray plate, on which a plurality of pin contacts are provided. The plurality of pin contacts are electrically connected to the corresponding stepper motor control board, detection circuit unit, display and power supply unit to be tested. The stepper motor unit includes a stepper motor, a disc with notches on its edges, and at least two through-beam slotted photoelectric sensors; the disc is fixedly mounted on the motor shaft of the stepper motor, and the edge of the disc is located within the slot of each through-beam slotted photoelectric sensor.

2. The motor control status detection device for the stepper motor control board according to claim 1, characterized in that: The detection circuit unit includes a microprocessor MCU, optocouplers U1 and U2, and two through-beam slotted photoelectric sensors OP1 and OP2; The first pin of the photoelectric sensor OP1 is connected to the power supply Vcc, the second pin of the photoelectric sensor OP1 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U1, and the third pin of OP1 is connected to the ground terminal GND. The positive terminal of the LED at the input end of the optocoupler U1 is connected to the power supply Vcc via resistor R1, and its negative terminal is connected to the second pin of the photoelectric sensor OP1. The collector of the output end of the optocoupler U1 is connected to one end of resistor R3 and capacitor C1 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter of the output end of the optocoupler U1, the other end of resistor R3 and capacitor C1 are connected to the ground terminal GND. The first pin of the photoelectric sensor OP2 is connected to the power supply Vcc, the second pin of the photoelectric sensor OP2 is connected to the negative terminal of the light-emitting diode at the input terminal of the optocoupler U2, and the third pin of OP2 is connected to the ground terminal GND. The positive terminal of the LED at the input end of optocoupler U2 is connected to the power supply Vcc via resistor R2, and its negative terminal is connected to the second pin of photoelectric sensor OP2. The collector of the output end of optocoupler U2 is connected to one end of resistor R4 and capacitor C2 and the input end of the microprocessor MCU, and is connected to the power supply VDD via resistor R3. The emitter of the output end of optocoupler U1, the other end of resistor R4 and capacitor C2, is connected to the ground terminal GND. The output terminal of the microprocessor (MCU) is connected to the input terminal of the display screen.

3. The motor control status detection device for the stepper motor control board according to claim 1 or 2, characterized in that: The tray is equipped with clips for securing the control board of the stepper motor to be inspected.

4. The motor control status detection device for the stepper motor control board according to claim 1 or 2, characterized in that: The power supply unit includes an AC / DC power module and a DC / DC power module. The AC input terminal of the AC / DC power module is connected to the power interface provided on the frame, the DC output terminal of the AC / DC power module is connected to the input terminal of the DC / DC power module, and the output terminal of the DC / DC power module is electrically connected to the corresponding pin contacts.

5. The motor control status detection device for the stepper motor control board according to claim 1 or 2, characterized in that: The horizontal angle between the two through-beam slotted photoelectric sensors and the center of the disk is 90°.

6. The motor control status detection device for the stepper motor control board according to claim 1 or 2, characterized in that: The display screen is mounted on the frame.