Direct current motor current detector

Abstract

The utility model relates to a direct current motor current detector comprising a pedestal, the pedestal is provided with a motor installation position, a button module and a prompt module, the motor installation position is connected with a motor driving acquisition module, and the pedestal is internally provided with a main control module. The main control module is respectively connected with the key module, the motor drive acquisition module and the prompt module; when the key module is pressed down, the main control module controls the motor driving and collecting module to drive the motor on the motor mounting position to rotate, collects current and controls the prompting module to give out a prompt according to the magnitude of the current. The motor fault can be quickly and intuitively judged.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor detection technical field, in particular to a direct current motor current detector. BACKGROUND

[0002] At present, the motor used in the air valve actuator needs to be crimped with various output gears on the motor output shaft according to the structure of the air valve actuator gear box after being purchased back, and the motor failure may be caused in the crimping operation process, and the traditional motor detection equipment cannot quickly and effectively detect the running state and performance of the motor, thereby affecting the production efficiency and quality of the whole machine in the process of producing the air valve actuator. INNOVATION CONTENT

[0003] The utility model solves the technical problem that a direct current motor current detector can quickly and intuitively judge motor failure.

[0004] The utility model adopts the technical scheme that a direct current motor current detector is provided, which comprises a base, a motor mounting position, a key module and a prompt module are arranged on the base, the motor mounting position is connected with a motor drive collection module, a main control module is arranged in the base, the main control module is connected with the key module, the motor drive collection module and the prompt module respectively, when the key module is pressed, the main control module controls the motor drive collection module to drive the motor on the motor mounting position to rotate and collect current, and controls the prompt module to give a prompt according to the size of the current.

[0005] The motor mounting position on the base is one-to-one corresponding to the keys of the key module.

[0006] The main control module adopts an AT32F421F8P7 chip.

[0007] The motor drive collection module adopts an AS4950 chip, the input end of the AS4950 chip is connected with the motor signal driving end of the main control module, the output end is connected with the motor mounting position, and the detection end of the AS4950 chip is connected with the detection current input end of the main control module through a resistor.

[0008] The prompt module comprises a buzzer prompt unit, an LED prompt unit and a display screen.

[0009] The buzzer prompt unit comprises a triode, the base of the triode is connected with the buzzer signal output end of the main control module, the emitter is grounded, and the collector is connected with the power supply through a buzzer.

[0010] The LED prompting unit comprises a first LED indicator light and a second LED indicator light, the negative electrode of the first LED indicator light is connected with the normal signal output end of the master control module, and the positive electrode is connected with a power supply; the negative electrode of the second LED indicator light is connected with the abnormal signal output end of the master control module, and the positive electrode is connected with a power supply.

[0011] Advantages

[0012] Compared with the prior art, the utility model has the following advantages and positive effects: the utility model discloses a motor driving and current acquisition module can control the clockwise rotation and counterclockwise rotation of the motor, and the running current of the motor is acquired simultaneously, the master control module can determine whether the motor has a fault according to the acquired current, and corresponding prompt is given, thereby ensuring that the operator can quickly and effectively judge the detection result. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the layout of the DC motor current detector of the utility model embodiment;

[0014] Figure 2 is the circuit diagram of the master control module in the utility model embodiment;

[0015] Figure 3 is the circuit diagram of the prompting module in the utility model embodiment;

[0016] Figure 4 is the circuit diagram of the power module in the utility model embodiment;

[0017] Figure 5 is the circuit diagram of the motor driving and acquisition module in the utility model embodiment;

[0018] Figure 6 is the circuit diagram of the key module in the utility model embodiment. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0020] The embodiment of the utility model relates to a DC motor current detector, such as Figure 1As shown, it comprises a base 1, the base 1 is provided with a motor mounting position 2, a key module 3 and a prompt module, the motor mounting position 2 is connected with a motor drive collection module, the base 1 is provided with a main control module, the main control module is connected with the key module, the motor drive collection module and the prompt module respectively; the main control module controls the motor drive collection module to drive the motor on the motor mounting position 2 to rotate and collect current when the key module is pressed, and controls the prompt module to issue a prompt according to the size of the current. Wherein, the prompt module comprises an LED prompt unit 4, a buzzer prompt unit and an LCD display screen 5. The motor mounting position 2 in the embodiment has four, and the LED prompt unit 4 also has four state display areas, which are one-to-one corresponding to the four motor mounting positions.

[0021] As shown in the figure, Figure 2 The main control module in the embodiment adopts an STM32 single-chip microcomputer, the first pin thereof is connected with a power supply, the seventh pin is connected with the power supply through a resistor R28 and grounded through a capacitor C22, the eighth pin is grounded and also connected with the power supply through a capacitor C21, the ninth pin is connected with the power supply and also grounded through a capacitor C23, a capacitor C25 is connected between the twenty-third pin and the twenty-fourth pin, the twenty-third pin is also grounded, the twenty-fourth pin is connected with the power supply, the forty-fourth pin is grounded through a resistor R24, the forty-seventh pin is grounded, and the forty-eighth pin is connected with the power supply.

[0022] As shown in the figure, Figure 3 The LED prompt unit 4 in the prompt module in the embodiment comprises four branches corresponding to the four motor mounting positions, wherein each branch comprises a first LED indicator and a second LED indicator, the first LED indicator can be a green light, the negative electrode thereof is connected with the thirty-second pin of the STM32 single-chip microcomputer through a resistor R16, and the positive electrode is connected with the power supply; the second LED indicator can be a red light, the negative electrode thereof is connected with the thirty-first pin of the STM32 single-chip microcomputer through a resistor R17, and the positive electrode is connected with the power supply. The structures of the other three branches are the same as that of the branch, and the difference lies in the connection with the pins of the STM32 single-chip microcomputer, the second branch is connected with the twenty-ninth pin and the thirtieth pin of the STM32 single-chip microcomputer, the third branch is connected with the twenty-seventh pin and the twenty-eighth pin of the STM32 single-chip microcomputer, and the fourth branch is connected with the twenty-fifth pin and the twenty-sixth pin of the STM32 single-chip microcomputer.

[0023] The buzzer prompt unit in the prompt module in the embodiment comprises a transistor Q1, the base of the transistor Q1 is connected with the thirty-third pin of the STM32 single-chip microcomputer, the emitter is grounded, and the collector is connected with the power supply through a buzzer.

[0024] In this embodiment, the LCD display 5 in the prompt module is connected to the STM32 microcontroller through the display interface. The first pin of the display interface is connected to the power supply through resistor R32, the second pin is grounded, the third pin is connected to the power supply, the fourth pin is connected to the tenth pin of the STM32 microcontroller through resistor R33, the fifth pin is connected to the restart circuit, the sixth pin is connected to the twelfth pin of the STM32 microcontroller through resistor R34, the seventh pin is connected to the thirteenth pin of the STM32 microcontroller through resistor R36, and the eighth pin is connected to the eleventh pin of the STM32 microcontroller through resistor R37.

[0025] The LCD screen in this prompt module displays the motor's operating status, parameter information, and judgment results. The LED indicator in the same module indicates the judgment results: a green light indicates a successful test, and a red light indicates a failed test. The buzzer unit in the same module can quickly notify the operator of any motor malfunction.

[0026] like Figure 4 As shown, the base in this embodiment is also equipped with a power conversion module. The power conversion module uses LM2576-ADJ for step-down regulation, and then the voltage is stabilized at 12V by the first voltage regulator chip, and then the voltage is stabilized at 3.3V by the second voltage regulator chip.

[0027] like Figure 5 As shown, with Figure 1 Taking the motor corresponding to the first mounting bracket as an example, the motor drive acquisition module in this embodiment uses an AS4950 chip. The first pin of the AS4950 chip is grounded, and the second and third pins are connected as input terminals to the forty-fifth and forty-sixth pins of the STM32 microcontroller. The fourth pin is connected to the power supply through resistor R7. The fifth pin is grounded through parallel capacitors C19 and C20, and is also connected to the power supply. The sixth and eighth pins are connected to the motor as output terminals. The seventh pin is connected to the fifteenth pin of the STM32 microcontroller through resistor R22, and the ninth pin is grounded. The motors corresponding to the other three mounting brackets also have corresponding motor drive acquisition modules. In this embodiment, all motors use the same motor drive acquisition module. Through these four motor drive acquisition modules, the motors in the four mounting brackets can be made to rotate clockwise, counterclockwise, and stop.

[0028] like Figure 6As shown, the key module in the embodiment includes four keys, wherein one end of the first key is grounded, and the other end is connected with the nineteenth pin of the STM32 single-chip microcomputer, one end of the second key is grounded, and the other end is connected with the twentieth pin of the STM32 single-chip microcomputer, one end of the third key is grounded, and the other end is connected with the twenty-first pin of the STM32 single-chip microcomputer, and one end of the fourth key is grounded, and the other end is connected with the twenty-second pin of the STM32 single-chip microcomputer.

[0029] When the direct-current motor current detector of the embodiment is used, the motor to be tested is first placed in the installation position, and then the key of the key module at the corresponding position is pressed to start the test.

[0030] It can be found that the motor driving and current collecting module can control the clockwise rotation and counterclockwise rotation of the motor, and simultaneously acquire the motor operating current, the main control module can determine whether the motor has a fault according to the collected current, and give a corresponding prompt, thereby ensuring that the operator can quickly and effectively judge the detection result.

Claims

1. A DC motor current detector, characterized by comprising: The base is provided with a motor mounting position, a button module and a prompt module, the motor mounting position is connected with a motor driving collection module, a main control module is arranged in the base, and the main control module is connected with the button module, the motor driving collection module and the prompt module respectively; when the button module is pressed, the main control module controls the motor driving collection module to drive the motor on the motor mounting position to rotate and collect current, and controls the prompt module to give a prompt according to the size of the current.

2. The DC motor current detector according to claim 1, characterized in that, The motor mounting position on the base is one-to-one corresponding to the button of the button module.

3. The DC motor current detector according to claim 1, wherein The main control module adopts an AT32F421F8P7 chip.

4. The DC motor current detector according to claim 1, wherein The motor driving collection module adopts an AS4950 chip, an input end of the AS4950 chip is connected with a motor signal driving end of the main control module, an output end is connected with the motor mounting position, and a detection end of the AS4950 chip is connected with a detection current input end of the main control module through a resistor.

5. The DC motor current detector according to claim 1, wherein, The prompt module comprises a buzzer prompt unit, an LED prompt unit and a display screen.

6. The DC motor current detector according to claim 5, wherein, The buzzer prompt unit comprises a triode, a base of the triode is connected with a buzzer signal output end of the main control module, an emitter is grounded, and a collector is connected with a power supply through a buzzer.

7. The DC motor current detector according to claim 5, wherein The LED prompt unit comprises a first LED indicator lamp and a second LED indicator lamp, a negative electrode of the first LED indicator lamp is connected with a normal signal output end of the main control module, and a positive electrode is connected with a power supply; a negative electrode of the second LED indicator lamp is connected with an abnormal signal output end of the main control module, and a positive electrode is connected with a power supply.

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