CN220170215U - Angle sensor rotation testing device - Google Patents

Abstract

The utility model provides an angle sensor rotation testing device which comprises a stepping motor, an angle sensor, a controller, an upper computer and a switching shaft, wherein an output shaft of the stepping motor is fixedly connected with one end of the switching shaft, and the other end of the switching shaft is connected with the angle sensor; the stepping motor is in communication connection with the controller through the communication interface, the angle sensor is in communication connection with the controller through the communication interface, the controller is in communication connection with the upper computer through the communication interface, the controller is configured to read rotation angle data of the stepping motor and output angle data of the angle sensor, the controller is further configured to perform data conversion on the read rotation angle data and the output angle data, and the upper computer reads data of the data conversion of the controller. The utility model integrates motor control and sensor control, can realize high-precision test of various types of sensors, and drives and communicates through a small stepping motor and a matched controller.

Description

Angle sensor rotation testing device

[ field of technology ]

The utility model relates to the technical field of sensor testing, in particular to an angle sensor rotation testing device.

[ background Art ]

Angle sensors are widely used in industrial, automotive and robotic applications, where the angle sensors are, for example, automotive coolant valve position detection, steering wheel sensing, BLDC motor rotor detection, etc.

The test requirements for the angle sensor are more and more increased, and the traditional angle sensor testing device generally drives a servo motor to drive a sensor detection shaft to operate at a specific angle through a computer upper computer, and then reads the angle value output by the sensor for comparison. When the servo motor is connected with the sensor through a series of transmission shafts, a large clearance error is generated to influence the measurement accuracy. In addition, the upper computer can only detect a certain specific type of sensor, and can not test sensors with different output signals. The cost of the servo motor is also relatively high.

Therefore, a new solution is needed to solve the above problems.

[ utility model ]

The utility model aims to provide an angle sensor rotation testing device which integrates motor control and sensor control, can realize high-precision testing of various types of sensors, and is driven and communicated through a small stepping motor and a matched controller.

The angle sensor rotation test device of the present utility model includes: a stepping motor, an angle sensor, a controller, an upper computer and a switching shaft,

the output shaft of the stepping motor is fixedly connected with one end of the switching shaft, and the other end of the switching shaft is connected with the angle sensor;

the stepping motor is in communication connection with the controller through a communication interface, the angle sensor is in communication connection with the controller through the communication interface, the stepping motor is configured to rotate according to instructions of the controller, and the angle sensor is configured to detect the rotation angle of the switching shaft and output the rotation angle data to the controller;

the controller is in communication connection with the upper computer through a communication interface, the controller is configured to read rotation angle data of the stepping motor and output angle data of the angle sensor, meanwhile, the controller is also configured to perform data conversion on the read rotation angle data and the read output angle data, and the upper computer reads data of the controller for performing data conversion.

Further, the angle sensor comprises a PCB, a sensor chip and a sensor sensing piece, wherein the sensor chip is connected to the central position on the PCB, the sensor sensing piece is fixedly arranged at the other end of the switching shaft and faces to the sensor chip, the stepping motor drives the sensor sensing piece to rotate through the switching shaft, and the sensor chip is configured to detect the rotation angle of the sensor sensing piece and transmit rotation angle data to the controller.

Further, the sensor sensing piece is embedded in the other end of the switching shaft, the sensor sensing piece is flush with the end face of the switching shaft, and the sensor sensing piece faces the sensor chip and is located right above the sensor chip.

Further, the switching shaft, the sensor sensing piece and the sensor chip are coaxially arranged, and the sensor sensing piece is a metal piece or a magnet.

Further, the controller is further connected with a power supply end of the stepping motor, and the controller is further used for supplying power to the stepping motor through the power supply end of the stepping motor.

Further, the controller is further connected with a power supply end of the angle sensor, and the controller is further used for supplying power to the angle sensor through the power supply end of the angle sensor.

Further, the controller is connected with the stepping motor through a serial interface;

the controller is connected with the angle sensor through an SPI interface, an I2C interface, an analog signal interface and/or a PWM signal interface;

the controller is connected with the upper computer through an RS232 interface.

Further, the stepper motor is a closed loop stepper motor.

Further, the upper computer is a computer. Compared with the prior art, the rotation testing device for the angle sensor has the following advantages:

the rotation testing device for the angle sensor adopts a high-precision small-sized stepping motor, and can realize the electric rotation function of the angle sensor with low cost.

According to the rotation testing device for the angle sensor, the adopted controller can process various testing signals and can drive the motor and the sensor to communicate at the same time.

The rotation testing device for the angle sensor can realize high-precision testing of various sensors, and is convenient to operate by driving and communicating with a small stepping motor and a matched controller. The device has the characteristics of low cost, high precision, wide application range and the like.

The rotation testing device for the angle sensor can be connected with a motor and sensors with different communication types, such as I2C communication, SPI communication, analog signals, PWM signals and the like, can process sensor signals and output the sensor signals to a computer end in a unified format, realizes testing of the sensors with different output signals by the same upper computer, and can reduce transmission rods and errors caused by transmission when the sensors are connected.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a block diagram of an angle sensor rotation test apparatus of the present utility model in one embodiment;

FIG. 2 is a schematic view of a portion of a rotation testing device for an angle sensor according to another embodiment of the present utility model;

fig. 3 is a cross-sectional view of fig. 2.

The device comprises a 1-stepper motor, a 2-controller, a 3-computer, a 4-angle sensor, a 5-adapter shaft, a 41-PCB (printed circuit board), a 42-sensor chip, a 43-sensor sensing piece and a 51-central cavity.

[ detailed description ] of the utility model

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Unless specifically stated otherwise, the terms coupled, connected, or connected, as used herein, mean either a direct or an indirect connection, such as a-to-B coupling, including both a and B directly electrically connected, and a connected to B through electrical components or circuitry.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

FIG. 1 is a block diagram of an angle sensor rotation test apparatus of the present utility model in one embodiment; FIG. 2 is a schematic view of a portion of a rotation testing device for an angle sensor according to another embodiment of the present utility model; fig. 3 is a cross-sectional view of fig. 2.

Please refer to fig. 1 to 3. The angle sensor rotation test device of the present utility model includes: the device comprises a stepping motor 1, an angle sensor 4, a controller 2, an upper computer and a switching shaft 5. The stepper motor is a closed loop stepper motor. The upper computer is a computer 3.

The output shaft of the stepping motor 1 is fixedly connected with one end of the switching shaft 5, and the other end of the switching shaft 5 is connected with the angle sensor 4.

The stepper motor 1 is in communication connection with the controller 2 through a communication interface a, the angle sensor 4 is in communication connection with the controller 2 through a communication interface b, the stepper motor 1 is configured to rotate according to instructions of the controller 2, and the angle sensor 4 is configured to detect the rotation angle of the adapter shaft 5 and output rotation angle data to the controller 2.

The controller 2 is in communication connection with the computer 3 through a communication interface c, the controller 2 is configured to read the rotation angle data of the stepper motor 1 and the output angle data of the angle sensor 4, meanwhile, the controller 2 is also configured to perform data conversion on the read rotation angle data and the output angle data, and the computer 3 reads the data converted by the controller 2. The computer 3 can obtain the precision value of the angle sensor at the current position by comparing the rotation angle of the stepping motor with the output angle of the sensor.

Please refer to fig. 2 and 3. The angle sensor 4 includes a PCB board 41, a sensor chip 42, and a sensor sensing piece 43. The sensor chip 42 is connected to the central position on the PCB 41, and the sensor sensing piece 43 is fixedly disposed at the other end of the adapter shaft 5 and faces the sensor chip 42. The stepper motor drives the sensor sensing piece 43 to rotate through the switching shaft 5, and the sensor chip 42 detects the rotation angle of the sensor sensing piece 43 and outputs rotation angle data to the controller 2. Further, the adapter shaft 5 has a central cavity 51, and the central cavity 51 axially penetrates the adapter shaft 5. The output shaft of the stepper motor 1 is inserted into the central cavity at one end of the switching shaft 5, and the sensor sensing piece 43 is embedded into the central cavity 51 at the other end of the switching shaft 5, so that the sensor sensing piece 43 and the switching shaft 5 are tightly fixed, and the sensor sensing piece and the output shaft of the closed-loop stepper motor are ensured to keep high coaxiality. Further, the sensor sensing piece 43 is flush with the end face of the adapter shaft 5, and the sensor sensing piece 43 faces the sensor chip 42 and is located right above the sensor chip 42.

In one embodiment, the adapter shaft 5, the sensor sensing piece 43 and the sensor chip 42 are coaxially arranged, and the sensor sensing piece 43 is a metal sheet or a magnet with a specific shape.

In one embodiment, the controller 2 is further connected to a power supply terminal of the stepper motor 1, and the controller 2 is further configured to supply power to the stepper motor 1 through the power supply terminal of the stepper motor 1. The controller 2 is further connected to a power supply end of the angle sensor 4, and the controller 2 is further configured to supply power to the angle sensor 4 through the power supply end of the angle sensor 4.

Please continue to refer to fig. 1. The working principle of the utility model is as follows: the controller 2 provides power supply and data communication for the closed-loop stepping motor 1 and the angle sensor 4, the controller 2 sends an instruction to the closed-loop stepping motor 1 through the communication interface a, the stepping motor 1 rotates a specific angle according to the instruction, the sensor sensing piece 43 is driven to rotate together when the stepping motor 1 rotates, the sensor chip 42 detects that the sensor sensing piece 43 outputs corresponding rotation angle data to the controller 2 after rotating, the controller 2 reads an angle signal sent by the angle sensor 4 through the communication interface b and performs data conversion processing, the computer 3 and the controller 2 communicate through the communication interface c, the controller 2 sends the converted data to the computer 3, meanwhile, the computer 3 also sends a motor driving instruction to the controller 2 and reads converted unified format data from the controller 2, and the computer end can obtain an angle sensor precision value of the current position by comparing the motor rotation angle and the sensor output angle.

Further, the controller 2 is connected with the stepper motor 1 through a serial interface. The controller 2 is connected with the angle sensor 4 through an SPI interface, an I2C interface, an analog signal interface and/or a PWM signal interface. The controller 2 and the computer 3 are connected through an RS232 interface. The controller is simultaneously connected with the motor and sensors with different communication types, such as I2C communication, SPI communication, analog signals, PWM signals and the like; and the controller can process the sensor signals, output the sensor signals to a computer end in a unified format, test the sensors with different output signals by the same upper computer, reduce a transmission rod and reduce errors caused by transmission when the sensors are connected.

The working principle of the present utility model will be described below by taking a hall angle sensor as an example. The sensor sensing piece of the Hall angle sensor is a magnet piece with half N pole and half S pole, one end of the switching shaft is processed into the same direct aperture of the magnet, and the sensor sensing piece is tightly fixed in the aperture, so that the magnet and an output shaft of the closed-loop stepping motor are ensured to keep higher coaxiality. The power supply end and the communication interface of the stepping motor are connected with a controller, and the controller controls the stepping motor to operate through a serial interface. The power supply end and the communication interface of the Hall angle sensor are connected with the controller, and the corresponding communication type, namely the SPI communication mode, is selected on the controller. The other end of the controller is connected with a computer through a communication interface, wherein the communication mode is RS 232. When the test is started, the upper computer sends a command of rotating the motor by a specific angle to the controller, the controller outputs the rotating command to the closed-loop stepping motor after receiving the command, after the stepping motor operates, the controller can ensure that the stepping motor operates normally by reading the current position information, and meanwhile, the controller reads the current rotating angle data of the stepping motor and processes the rotating angle data into the data type which can be identified by the general upper computer. And then the controller reads the angle data of the angle sensor and internally processes the angle data into the data type which can be identified by the general upper computer. The controller sends the rotation angle data of the stepping motor and the output angle data of the sensor which can be identified by the computer to the computer end in an RS232 communication mode. The computer end can obtain the precision value of the angle sensor at the current position by comparing the rotation angle of the motor with the output angle of the sensor. Typically, for a 360 degree rotation sensor, the computer will automatically send commands and receive data at intervals. In other embodiments, when the sensor data type is changed to I2C communication, the communication interface may be connected to a corresponding interface of the controller, such as an I2C interface, so as to implement communication. In addition, when the size of the sensor sensing piece changes, the switching shaft b can be conveniently processed into the size corresponding to the sensor sensing piece by CNC with high precision, and the testing precision is ensured.

The rotation testing device of the angle sensor adopts a closed-loop stepping motor with low cost, reduces intermediate errors through a single switching shaft, and ensures higher precision; the controller with multiple types of interfaces can aim at different types of sensors; the motor control and the sensor control are integrated, and the operation is convenient.

It should be noted that any modifications to the specific embodiments of the utility model may be made by those skilled in the art without departing from the scope of the utility model as defined in the appended claims. Accordingly, the scope of the claims of the present utility model is not limited to the foregoing detailed description.

Claims (9)

1. An angle sensor rotation testing device, comprising: a stepping motor, an angle sensor, a controller, an upper computer and a switching shaft,

the output shaft of the stepping motor is fixedly connected with one end of the switching shaft, and the other end of the switching shaft is connected with the angle sensor;

the stepping motor is in communication connection with the controller through a communication interface, the angle sensor is in communication connection with the controller through the communication interface, the stepping motor is configured to rotate according to instructions of the controller, and the angle sensor is configured to detect the rotation angle of the switching shaft and output the rotation angle data to the controller;

the controller is in communication connection with the upper computer through a communication interface, the controller is configured to read rotation angle data of the stepping motor and output angle data of the angle sensor, meanwhile, the controller is also configured to perform data conversion on the read rotation angle data and the read output angle data, and the upper computer reads data of the controller for performing data conversion.

2. The angle sensor rotation test device according to claim 1, wherein the angle sensor comprises a PCB board, a sensor chip and a sensor sensing piece, the sensor chip is connected to a central position on the PCB board, the sensor sensing piece is fixedly disposed at the other end of the transfer shaft and faces the sensor chip, the stepper motor drives the sensor sensing piece to rotate through the transfer shaft, and the sensor chip is configured to detect a rotation angle of the sensor sensing piece and transmit rotation angle data to the controller.

3. The rotation testing device of claim 2, wherein the sensor sensing piece is embedded in the other end of the transfer shaft, and the sensor sensing piece is flush with the end surface of the transfer shaft, and the sensor sensing piece faces the sensor chip and is located right above the sensor chip.

4. The rotation testing device of an angle sensor according to claim 2, wherein the adapter shaft, the sensor sensing piece and the sensor chip are coaxially arranged, and the sensor sensing piece is a metal sheet or a magnet.

5. The rotation testing device of an angle sensor of claim 1, wherein the controller is further coupled to a power terminal of the stepper motor, the controller further configured to power the stepper motor through the power terminal of the stepper motor.

6. The angle sensor rotation test device of claim 1, wherein the controller is further coupled to a power supply end of the angle sensor, the controller further configured to power the angle sensor through the power supply end of the angle sensor.

7. The rotation testing device of an angle sensor according to claim 1, wherein,

the controller is connected with the stepping motor through a serial interface;

the controller is connected with the angle sensor through an SPI interface, an I2C interface, an analog signal interface and/or a PWM signal interface;

the controller is connected with the upper computer through an RS232 interface.

8. The angle sensor rotation test apparatus of claim 1, wherein the stepper motor is a closed loop stepper motor.

9. The rotation testing device of claim 1, wherein the host computer is a computer.