CN205482773U - Full -automatic eddy current displacement sensor static characteristic test system - Google Patents

Abstract

The utility model relates to a full-automatic eddy current displacement sensor static characteristic testing system, which comprises a base and an eddy current displacement sensor to be tested. The base is provided with mutually parallel clamps and a linkage bracket, and a test piece is fixed on the linkage bracket disk; the base is provided with a control mechanism, the control mechanism includes a circuit board, switching power supply, motor controller, stepper motor, drive shaft, linear guide, linkage block, grating ruler and grating connection block, the circuit board, switch The power supply, motor controller, stepping motor, drive shaft, linear guide rail, linkage block, grating scale and grating connection block are all set on the base; a through hole is also opened on the base; the clamp is located at one end of the through hole, and the clamp is used for fixing The eddy current displacement sensor to be tested. The utility model is simple in structure, easy to operate, and can check the accuracy of the eddy current displacement sensor.

Description

Fully automatic eddy current displacement sensor static characteristic test system

technical field

The utility model relates to the technical field of sensor detection, in particular to a fully automatic eddy current displacement sensor static characteristic testing system.

Background technique

With its unique advantages, the eddy current displacement sensor system is widely used in electric power, petroleum, chemical industry, metallurgy and other industries. Online measurement and safety protection of axial displacement, phase detector, shaft speed, differential expansion, eccentricity, oil film thickness, etc., as well as rotor dynamics research and part size inspection.

The eddy current displacement sensor needs to be tested statically at the manufacturer. If the sensor has not been used for more than one year for a long time, or has been working continuously for more than two years, and the material of the measured body does not match the factory calibration material, it needs to be recalibrated.

Commonly used instruments and equipment for static characteristic testing and static calibration calibration include standard gauge blocks, dial gauges or dial gauges, static displacement calibrators, digital voltmeters, oscilloscopes, and DC stabilized power supplies. These instruments and equipment are suitable for use in a laboratory environment, but are inconvenient for use in the field of sensor work.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a fully automatic eddy current displacement sensor static characteristic testing system which is simple in structure, convenient to carry and easy to operate.

In order to achieve the above object, the utility model adopts the following technical solutions:

The fully automatic eddy current displacement sensor static characteristic test system includes a base and an eddy current displacement sensor to be tested. The base is provided with fixtures and linkage brackets parallel to each other, and the specimen disk is fixed on the linkage bracket; the base is equipped with The control mechanism includes a circuit board, a switching power supply, a motor controller, a stepping motor, a drive shaft, a linear guide rail, a linkage block, a grating ruler and a grating connection block, and the circuit board, a switching power supply, a motor controller, The stepper motor, drive shaft, linear guide rail, linkage block, grating scale and grating connection block are all set on the base, the switching power supply supplies power to the circuit board, motor controller, stepping motor and grating scale, and the grating scale is set parallel to the linear guide rail , the motor controller and the grating ruler are electrically connected to the circuit board, the motor controller is used to control the working state of the stepping motor, one end of the drive shaft is connected to the stepping motor, the other end of the drive shaft is connected to the linkage block, and the grating connection block One end of the linkage block is fixed to one side of the linkage block, the other end of the grating connection block is slidably connected to the grating scale, and the other side of the linkage block is provided with a limit piece fixed on the base, and the stepping motor is used to pass the drive shaft Control the movement of the linkage block on the linear guide rail, and drive the grating connection block to move along the grating scale; there is also a through hole on the base, one end of the linkage bracket passes through the through hole and is fixed on the linkage block, the through hole Corresponds to the position of the linear guide rail, and the length of the through hole matches the length of the linear guide rail; the clamp is located at one end of the through hole, and the clamp is used to fix the eddy current displacement sensor to be tested; the base is equipped with a connector and a USB interface, and the eddy current to be measured The displacement sensor is connected with the circuit board through the connector, and the circuit board is connected with the external terminal through the USB interface.

Preferably, the circuit board includes a control module, a data acquisition module and a comparative analysis module, the control module is electrically connected to the motor controller and the grating ruler, the data acquisition module is electrically connected to the eddy current displacement sensor to be measured, The comparative analysis module is used for comparative analysis of the data obtained by the control module and the data obtained by the data acquisition module, so as to control the working state of the control module.

Preferably, the base includes a top plate, a bottom plate and several support bars, one end of the support bar is fixed on the bottom plate, and the other end is fixed to the top plate, and an accommodation cavity is formed between the top plate and the bottom plate, and the control mechanism is located in the accommodation cavity and It is fixed on the back of the top board, and the through hole is located on the top board.

Preferably, a display module is further provided on the top board, and the display module is electrically connected to the circuit board.

Preferably, the connector is one of a DB15 connector and a J599 aviation connector.

The beneficial effects of the utility model are as follows:

The utility model has the advantages of simple structure, portability and easy operation. Among them, the stepper motor drives the linkage bracket to move through the linkage block, and uses the grating ruler to detect the displacement to convert it into a displacement electrical signal. Comparative analysis of the displacement electrical signals to verify the accuracy of the eddy current displacement sensor.

Description of drawings

Fig. 1 is a structural diagram of a static characteristic testing system of a fully automatic eddy current displacement sensor of the present invention.

Fig. 2 is a structural diagram of the control mechanism of the utility model automatic eddy current displacement sensor static characteristic testing system.

Fig. 3 is a circuit module diagram of the static characteristic testing system of the automatic eddy current displacement sensor of the present invention.

Reference signs: 1, base; 11, top plate; 12, bottom plate; 13, support bar; 14, fan frame; 15, fan; 2, fixture; 3, linkage bracket; 4, test piece tray; 5, control mechanism ;50, circuit board; 51, switching power supply; 52, motor controller; 53, stepping motor; 54, drive shaft; 55, linear guide rail; 56, linkage block; 57, grating ruler; , limit piece; 6, through hole; 7, connector; 8, USB interface; 9, display screen.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Please refer to Fig. 1 and Fig. 2. The utility model relates to a fully automatic eddy current displacement sensor static characteristic testing system, and its preferred embodiment includes a base 1 and an eddy current displacement sensor to be tested. It is used to detect whether the static characteristics of the eddy current displacement sensor to be tested are good and whether the distance measurement is accurate.

The base 1 is provided with fixtures 2 and interlocking brackets 3 parallel to each other, and the interlocking bracket 3 is fixed with a test piece disk 4; the base 1 is provided with a control mechanism 5, and the control mechanism 5 includes a circuit board 50, a switching power supply 51 , motor controller 52, stepping motor 53, drive shaft 54, linear guide rail 55, linkage block 56, grating ruler 57 and grating connection block 58, described circuit board 50, switching power supply 51, motor controller 52, stepping motor 53. Drive shaft 54, linear guide rail 55, linkage block 56, grating ruler 57 and grating connecting block 58 are all arranged on base 1, switching power supply 51 is circuit board 50, motor controller 52, stepping motor 53 and grating ruler 57 Power supply, grating ruler 57 and linear guide 55 are arranged in parallel, motor controller 52 and grating ruler 57 are all electrically connected with circuit board 50, motor controller 52 is used for controlling the working state of stepper motor 53, and one end of drive shaft 54 is connected with The stepper motor 53 is connected, the other end of the drive shaft 54 is connected with the linkage block 56, one end of the grating connection block 58 is fixed with one side of the linkage block 56, and the other end of the grating connection block 58 is slidably connected with the grating ruler 57, and the linkage block The other side of 56 is provided with a limiting piece 59 fixed on the base 1 .

The stepper motor 53 is used to control the movement of the linkage block 56 on the linear guide rail 55 through the drive shaft 54, and drives the grating connection block 58 to move along the grating ruler 57. The base 1 is also provided with a through hole 6, and the linkage bracket One end of 3 passes through the through hole 6 and is fixed on the linkage block 56, the through hole 6 corresponds to the position of the linear guide rail 55, and the length of the through hole 6 matches the length of the linear guide rail 55; At one end, the clamp 2 is used to fix the eddy current displacement sensor to be measured; the base 1 is provided with a connector 7 and a USB interface 8, and the eddy current displacement sensor to be measured is connected to the circuit board 50 through the connector 7, and the circuit board 50 is connected to the circuit board 50 through the USB Interface 8 is connected to an external terminal.

The external terminal here can be a computer, or a smart device such as a notebook, a tablet computer, or a mobile phone. Through the USB interface 8, a state of information interaction can be formed between the computer and the static characteristic test system of the eddy current displacement sensor. The connector may be one of a DB15 connector and a J599 aviation connector.

Of course, preferably, the base 1 may include a top plate 11, a bottom plate 12 and several support bars 13, one end of the support bars 13 is fixed on the bottom plate 12, and the other end is fixed to the top plate 11, and an accommodating cavity is formed between the top plate 11 and the bottom plate 12 , the control mechanism 5 is located in the accommodating cavity and fixed on the back of the top plate 11, and the through hole 6 is located on the top plate.

The support strips 13 are preferably fixed at the periphery of the bottom plate 12 , and the support strips 13 are evenly arranged on the periphery of the bottom plate 12 . In fact, circuit board 50, switching power supply 51, motor controller 52, stepper motor 53, drive shaft 54, linear guide 55, linkage block 56, grating ruler 57 and grating connection block 58 are all fixed on the back side of top plate 11.

In addition, a display module 9 is provided on the top board, and the display module 9 is electrically connected with the circuit board. The display module can be a touch screen, which is convenient for people to operate and read data. Preferably, a fan frame 14 is provided on one side of the base 1 , and a fan 15 for cooling is fixed on the fan frame 14 , and the fan 15 is electrically connected to the circuit board 51 .

What needs to be explained here is that when the stepping motor 53 controls the movement of the linkage block 56 on the linear guide rail 55 , it also drives the linkage bracket 3 to make a corresponding movement, that is, drives the test piece disk 4 to generate a corresponding distance. At this time, the eddy current displacement sensor to be tested can detect the distance data of the test piece disk 4 , and the circuit board 50 collects the distance data and converts it into a distance electrical signal. In addition, the grating ruler 57 also detects the displacement data of the linkage block 56 at the same time. The displacement data of the linkage block 56 is equal to the displacement data of the test piece disc. The circuit board 50 collects the displacement data detected by the grating ruler and converts it into a displacement electrical signal. , and compare and analyze the distance signal and the displacement electrical signal. If the two different electrical signals are inconsistent and outside a certain error range, it indicates that there is an error in the static characteristics of the eddy current displacement sensor, which needs to be adjusted and corrected. If the two If the different electrical signals are the same or within a certain error range, it indicates that the static characteristics of the eddy current displacement sensor are good.

As shown in FIG. 3 , preferably, the circuit board may include a control module, a data acquisition module and a comparative analysis module.

The control module is electrically connected with the motor controller and the grating scale. The control module can control the working state of the motor controller. When the switching power supply is turned on and tested, the motor controller works to make the stepping motor work and drive the drive shaft to work. When the driving shaft drives the linkage block to slide on the linear guide rail, the grating connection block also generates a displacement relative to the grating ruler. At this time, the grating ruler is used to record the displacement data and transmit it to the control module, which is converted into a displacement electrical signal by the control module.

The data acquisition module is electrically connected with the eddy current displacement sensor to be measured, that is, the data acquisition module is electrically connected with the eddy current displacement sensor to be measured through a connector. The eddy current displacement sensor to be tested transmits the detected displacement data of the test piece disk to the data acquisition module, and is converted into a displacement electrical signal by the data acquisition module.

The comparative analysis module is used for comparative analysis of the data obtained by the control module and the data obtained by the data acquisition module, so as to control the working state of the control module. After the comparative analysis module analyzes each data, it outputs a result and feeds back a signal to the control module at the same time, so that the motor controller stops working, that is, the stepping motor stops working, so as to complete the test.

For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and ideas described above, and all these changes and modifications should fall within the protection scope of the claims of the present invention .

Claims (5)

1. A fully automatic eddy current displacement sensor static characteristic testing system, is characterized in that, comprises base, eddy current displacement sensor to be measured, and described base is provided with mutually parallel fixture and linkage support, is fixed on linkage support The test piece disk; a control mechanism is provided in the base, and the control mechanism includes a circuit board, a switching power supply, a motor controller, a stepping motor, a drive shaft, a linear guide rail, a linkage block, a grating ruler and a grating connection block, and the circuit board , switching power supply, motor controller, stepping motor, drive shaft, linear guide rail, linkage block, grating ruler and grating connecting block are all set on the base, and the switching power supply supplies power to the circuit board, motor controller, stepping motor and grating ruler , the grating ruler is set parallel to the linear guide rail, the motor controller and the grating ruler are electrically connected to the circuit board, the motor controller is used to control the working state of the stepping motor, one end of the drive shaft is connected to the stepping motor, and the other end of the drive shaft It is connected with the linkage block, one end of the grating connection block is fixed to one side of the linkage block, the other end of the grating connection block is slidably connected to the grating ruler, and the other side of the linkage block is provided with a limit piece fixed on the base. The stepper motor is used to control the movement of the linkage block on the linear guide rail through the drive shaft, and drive the grating connection block to move along the grating ruler; there is also a through hole on the base, and one end of the linkage bracket passes through the through hole and is fixed On the linkage block, the through hole corresponds to the position of the linear guide rail, and the length of the through hole matches the length of the linear guide rail; the clamp is located at one end of the through hole, and the clamp is used to fix the eddy current displacement sensor to be measured; there is a connector on the base and a USB interface, the eddy current displacement sensor to be tested is connected with the circuit board through the connector, and the circuit board is connected with the external terminal through the USB interface. 2. The full-automatic eddy current displacement sensor static characteristic testing system as claimed in claim 1, is characterized in that: described circuit board comprises control module, data acquisition module and comparative analysis module, and described control module and motor controller and grating The ruler is electrically connected, the data acquisition module is electrically connected with the eddy current displacement sensor to be measured, and the comparative analysis module is used to compare and analyze the data obtained by the control module and the data obtained by the data acquisition module, so as to control the working state of the control module . 3. The full-automatic eddy current displacement sensor static characteristic testing system as claimed in claim 1, wherein: the base comprises a top plate, a bottom plate and several support bars, one end of the support bars is fixed on the bottom plate, and the other end is connected to the top plate Fixing, an accommodating cavity is formed between the top plate and the bottom plate, the control mechanism is located in the accommodating cavity and fixed on the back of the top plate, and the through hole is located on the top plate. 4. The fully automatic eddy current displacement sensor static characteristic testing system as claimed in claim 3, wherein a display module is further provided on the top plate, and the display module is electrically connected to the circuit board. 5. The fully automatic eddy current displacement sensor static characteristic testing system according to claim 1, wherein the connector is one of a DB15 connector and a J599 aviation connector.