CN111964705A - Device for automatically detecting high-low temperature motion characteristics of proximity sensor - Google Patents

Abstract

The invention provides a device for automatically detecting high and low temperature motion characteristics of a proximity sensor, which comprises an industrial personal computer, a motion control system, a data acquisition system, an instrument system, a printer, a high and low temperature test box and a motion mechanism, wherein the industrial personal computer is connected with the motion control system; the industrial personal computer is respectively connected with the motion control system, the data acquisition system, the instrument system and the printer; a proximity sensor assembly is arranged in the high-low temperature test box; the proximity sensor assembly is respectively connected with the data acquisition system and the instrument system; the motion mechanism for detecting the proximity sensor assembly is installed on the high-low temperature test box and is connected with the motion control system, the data acquisition system and the instrument and meter system. The invention has the advantages of high reliability, good stability, excellent cost performance, advanced key technology, open control platform, simple operation and the like.

Description

A device for automatic detection of high and low temperature motion characteristics of proximity sensors

technical field

The invention belongs to the field of sensor detection, in particular to a device for automatically detecting the high and low temperature motion characteristics of a proximity sensor.

Background technique

With the development of my country's industrial technology, electronic products are gradually developing towards miniaturization, light weight, and high performance, which leads to an increase in product function density, an increase in sensitive components, and an increase in design life, especially a large number of new composite materials, polymerized The use of physical materials and the continuous improvement of the integration of microelectronic circuits make electronic products more sensitive to the impact of space environmental effects. The test methods for space special environmental effects that did not attract enough attention are now becoming more and more prominent and become products. The bottleneck of high precision and high stability design.

A proximity sensor is a switch-type sensor (ie, a non-contact switch) for position detection without touching the detection object. At present, this type of position detection sensor is used in more and more fields, and the requirements for special environmental effects in space are getting higher and higher, and the accuracy requirements are getting higher and higher. To compensate for the ambient temperature of the product, it is necessary to accurately find out The performance parameters of the product in the high and low temperature environment.

The high and low temperature test box has the ability to simulate the temperature change law in the atmospheric environment. It is mainly aimed at the adaptability test of electronic products and other materials when they are transported and used in a comprehensive environment of high temperature and low temperature. For product design, improvement, identification and inspection and other links. The test of the working performance of the proximity sensor requires not only a high and low temperature environment, but also a precise motion mechanism and a set of precise testing systems. In order to meet the performance of the position detection sensor at high and low temperatures, it is necessary to keep the test at a constant/fixed rate of change temperature, and the relative position of the sensor to the target needs to be changed. In addition, the performance data of electronic products need to be changed Collect, process, judge and generate test result data.

SUMMARY OF THE INVENTION

In order to achieve the above-mentioned requirements of compositeness, the present invention proposes a device for automatically detecting the high and low temperature motion characteristics of a proximity sensor. By setting a motion mechanism, the position of the detection target of the proximity sensor assembly in the high and low temperature test chamber is changed, and at the same time through the high and low temperature The temperature of the test box is changed to realize the composite detection of the proximity sensor, and at the same time, the data acquisition system collects and analyzes the data of the proximity sensor.

The concrete realization content of the present invention is as follows:

The invention provides a device for automatically detecting the high and low temperature motion characteristics of a proximity sensor, including an industrial computer, a motion control system, a data acquisition system, an instrumentation system, a printer, a high and low temperature test box, and a motion mechanism;

The industrial computer is respectively connected with the motion control system, the data acquisition system, the instrumentation system and the printer;

A proximity sensor assembly is arranged in the high and low temperature test box; the proximity sensor assembly is respectively connected with the data acquisition system and the instrumentation system;

The motion mechanism for detecting the proximity sensor assembly is installed on the high and low temperature test box, and is connected with the motion control system, the data acquisition system, and the instrumentation system.

In order to better realize the present invention, further, the motion mechanism includes an internal plane support structure, an X1-axis motion module, an X1-axis closed-loop five-phase motor, a structural mounting surface assembly, an external support structure, and a signal connector;

The inner plane support structure is a multi-layer fixed frame body, which is installed in the high and low temperature test box, and the bottom is fixedly connected with the inside of the high and low temperature test box;

The proximity sensor assembly includes an upper-layer measured proximity sensor assembly that is fixedly installed in the high and low temperature test chamber and located on the upper end face of the inner plane support structure;

The structural mounting surface assembly includes two panels installed on the inner and outer sides of one wall of the high and low temperature test chamber, the external support structure is a rectangular box body, and one side of the rectangular box body and the structural mounting surface assembly are installed in the high and low temperature test chamber. The outer panel is fixedly connected;

The signal connector is installed on the external support structure, and is sequentially connected with the X1-axis closed-loop five-phase motor and the X1-axis motion module installed on the upper end face of the external support structure; the output end of the X1-axis motion module is connected to the X1-axis auxiliary The test piece; the X1-axis auxiliary test piece includes an X1-axis connecting rod connected with the X1-axis motion module and an X1-axis auxiliary target assembly for auxiliary detection; Through the hole, the X1 axis connecting rod enters the high and low temperature test box through the hole; the X1 axis auxiliary target assembly is installed at the end of the X1 axis connecting rod and corresponds to the upper-layer measured proximity sensor assembly.

In order to better realize the present invention, further, the upper-layer measured proximity sensor assembly includes a sensor mounting seat, an upper-layer measured proximity sensor, and a butterfly locking screw;

The sensor mounting seat is installed on the upper end face of the inner plane support structure, and the upper-layer measured proximity sensor is installed on the sensor mounting seat by a butterfly locking screw;

The X1-axis auxiliary target assembly includes a target mounting plate, a target mounting column, a push-pull connecting rod, and a butterfly locking screw;

The target mounting plate is fixedly connected to the X1 axis connecting rod through a push-pull link; the target mounting column is installed on the side of the target mounting plate that is close to the upper-layer measured proximity sensor through butterfly locking screws, and is close to the upper-layer measured proximity sensor. The positions of the sensors are correspondingly consistent on the Y-axis and the Z-axis; the end face of the target mounting plate is mounted with a target for sensing the proximity sensor to be measured on the upper layer.

In order to better realize the present invention, it further includes a zero-position stopper; the zero-position stopper is mounted on the sensor mounting seat on the side of the sensor mounting seat facing the target mounting plate in a height-adjustable manner through a screw, and meets the requirements of the zero-position stopper. When the stopper is adjusted to the highest height, it can be blocked between the target and the detection head of the proximity sensor under test on the upper layer.

In order to better realize the present invention, it further includes a guide alignment device, and the guide alignment device includes a positioning guide shaft and a guide column;

The positioning guide shaft is mounted on the target mounting plate on the same side as the target mounting post;

The guide column is mounted on the sensor mounting seat on the side facing the target mounting plate, and the guide column is provided with a slot into which the positioning guide shaft can be inserted;

When the positioning guide shaft is inserted into the guide column to be fixed, the target on the target installation column and the detection head of the proximity sensor to be measured on the upper layer are exactly the same in the Y-axis and Z-axis positions.

In order to better realize the present invention, it further includes an optical installation platform and an open linear grating assembly; the optical installation platform is installed on the top surface of the rectangular box of the external support structure, and the X1 axis motion module , X1-axis closed-loop five-phase motor is installed on the optical installation platform, the open linear grating assembly is installed on the optical installation platform, and is connected with the data acquisition system and the instrumentation system through the signal connector.

In order to better realize the present invention, further, the X1-axis motion module includes a coupling, a bearing, a slider, a mounting plate, and a ball screw;

The mounting plate is fixedly mounted on the optical mounting platform, the bearing is mounted on the mounting plate, and one end is connected to the ball screw, and the other end is connected to the output shaft of the X1-axis closed-loop five-phase motor through a coupling;

The ball screw is mounted on the upper end of the mounting plate, the mounting plate is provided with an integrated linear ball guide rail, and the slider moves on the mounting plate through the integrated linear ball guide rail;

One end of the X1 axis connecting rod is installed on the slider, and the other end passes through the structural mounting surface assembly and enters the high and low temperature test chamber to be connected with the X1 axis auxiliary target assembly.

In order to better realize the present invention, it further includes a built-in limit switch, and the built-in limit switch is arranged on the mounting plate and located at the end of the ball screw.

In order to better realize the present invention, further, the proximity sensor assembly further includes a lower-layer measured proximity sensor assembly; the device further includes an X2-axis closed-loop five-phase motor, an X2-axis motion module, and an X2-axis auxiliary test piece;

The lower-layer measured proximity sensor assembly is installed in the high-low temperature test chamber at the lower layer of the internal plane support structure, which is consistent with the upper-layer measured proximity sensor assembly structure;

The X2-axis closed-loop five-phase motor, the X2-axis motion module, and the X2-axis auxiliary test piece are installed on the bottom end surface of the rectangular box body of the external support structure; together with the X1-axis motion module, the X1-axis closed-loop five-phase motor, and the X1-axis auxiliary The structure of the test piece corresponds to the same;

The X2-axis closed-loop five-phase motor is connected to the signal connector, and the output end of the X2-axis closed-loop five-phase motor is sequentially connected to the X2-axis motion module and the X2-axis auxiliary test piece, and the X2-axis auxiliary test piece is tested at high and low temperatures. The inside of the box corresponds to the under-measured proximity sensor assembly.

In order to better realize the present invention, further, the bottom end surface of the external support structure is also provided with an optical installation platform and an open linear grating assembly, and the X2-axis closed-loop five-phase motor and the X2-axis motion module are installed on the external support structure. On the optical installation platform on the bottom end face, the open linear grating assembly on the bottom end face is installed on the side of the X2 axis motion module on the optical installation platform.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) It can not only meet the static performance of the proximity sensor to be tested under high and low temperature, but also test the dynamic performance of the proximity sensor to be tested. The invention can automatically control the relative movement of the target and the proximity sensor in the high and low temperature test chamber, and the movement direction is axial movement;

(2) The control system software realizes target displacement setting, displacement direction, initial displacement, end displacement, displacement speed and other motion parameter setting and real-time display functions; it has automatic, fast and accurate positioning and position holding functions; target centerline Align with the center line of the proximity sensor; the target and the sensing surface of the proximity sensor are automatically zeroed; the output voltage, resistance and inductance signals of the proximity sensor are collected and displayed;

(3) The man-machine interface of the instrumentation system is good, with good operability and adaptability. It has the advantages of high reliability, good stability, excellent cost performance, advanced key technology, and open control platform;

(4) The installation fixtures of the proximity sensor and the target can be disassembled to facilitate the installation of products and targets of different shapes; the material of the fixture is required to be non-magnetic material.

Description of drawings

Fig. 1 is the structure diagram of the complete system frame of the device;

Figure 2 is a schematic diagram of the connection relationship between the high and low temperature test chamber of the device and the motion mechanism;

Fig. 3 is a plane front view corresponding to the test of the motion mechanism and the proximity sensor assembly;

4 is a schematic structural diagram of the corresponding test of the X1-axis auxiliary test piece or the X2-axis auxiliary test piece and the upper-layer tested proximity sensor assembly or the lower-layer tested proximity sensor assembly;

Figure 5 is a schematic diagram of the positioning guide shaft inserted into the guide column when the X1-axis auxiliary test piece or the X2-axis auxiliary test piece and the upper-layer measured proximity sensor assembly or the lower-layer measured proximity sensor assembly are overlapped and processed;

6 is a schematic diagram of the corresponding position structure of the target mounting plate and the sensor mounting seat;

Fig. 7 is the installation schematic diagram of the optical installation platform, the open linear grating assembly and the X1-axis motion module, the X1-axis closed-loop five-phase motor or the X2-axis motion module, and the X2-axis closed-loop five-phase motor;

Figure 8 is a top view of the structural connection and installation of the X1-axis motion module and the X1-axis closed-loop five-phase motor;

Figure 9 is a right side view of the structural connection and installation of the X1-axis motion module and the X1-axis closed-loop five-phase motor;

Figure 10 is a perspective view of the structural connection and installation of the X1-axis motion module and the X1-axis closed-loop five-phase motor;

Fig. 11 is the test flow chart when the device carries out the high and low temperature test;

Figure 12 is a schematic diagram of a signal connector;

FIG. 13 is a three-dimensional schematic diagram of the device.

Among them: 1. The lower-layer measured proximity sensor assembly, 2. The upper-layer measured proximity sensor assembly, 3. Internal plane support structure, 4. The X2-axis closed-loop five-phase motor, 5. The X1-axis motion module, 6. The X1-axis closed-loop five-phase motor Phase motor, 7. Structural mounting surface components, 8. X2-axis motion module, 9. External support structure, 10. Signal connector, 11. Sensor mounting seat, 12. Proximity sensor under test on the upper layer, 13. Butterfly locking Screw, 14, Zero stop, 15, Positioning guide shaft, 16, Guide column, 17, Target mounting plate, 18, Target mounting column, 19, Push-pull link, 20, Optical mounting platform, 21, Open linear grating Components, 22, Coupling, 23, Bearing, 24, Slider, 25, Integrated Linear Ball Guide, 26, Built-in Limit Switch, 27, Ball Screw, 28, Mounting Plate, 29, High and Low Temperature Test Chamber.

Detailed ways

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the described embodiments are only Some, but not all, embodiments of the present invention should therefore not be construed as limiting the scope of protection. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "arranged", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can also be directly connected, or it can be indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1:

A device for automatically detecting the high and low temperature motion characteristics of a proximity sensor, as shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9, Figure 10, including an industrial computer, Motion control system, data acquisition system, instrumentation system, printer, high and low temperature test chamber 29, motion mechanism;

The industrial computer is respectively connected with the motion control system, the data acquisition system, the instrumentation system and the printer;

A proximity sensor assembly is arranged in the high and low temperature test box 29; the proximity sensor assembly is respectively connected with the data acquisition system and the instrumentation system;

The motion mechanism for detecting the proximity sensor assembly is installed on the high and low temperature test box 29, and is connected with the motion control system, the data acquisition system, and the instrumentation system.

In order to better realize the present invention, further, the motion mechanism includes an internal plane support structure 3, an X1-axis motion module 5, an X1-axis closed-loop five-phase motor 6, a structural mounting surface assembly 7, an external support structure 9, and a signal connection. device 10;

The inner plane support structure 3 is a multi-layer fixed frame body, installed in the high and low temperature test box 29, and the bottom is fixedly connected with the inside of the high and low temperature test box 29;

The proximity sensor assembly includes an upper-layer measured proximity sensor assembly 2 that is fixedly installed in the high and low temperature test chamber 29 on the upper end surface of the inner plane support structure 3;

The structural mounting surface assembly 7 includes two panels installed on the inner and outer sides of one wall of the high and low temperature test chamber 29 respectively. The external support structure 9 is a rectangular box body, and one side of the rectangular box body and the structural mounting surface assembly 7 are installed on the side. The panels on the outside of the high and low temperature test chamber 29 are fixedly connected;

The signal connector 10 is installed on the external support structure 9, and is sequentially connected with the X1-axis closed-loop five-phase motor 6 and the X1-axis motion module 5 installed on the upper end face of the external support structure 9; The output end is connected to the X1-axis auxiliary test piece; the X1-axis auxiliary test piece includes an X1-axis connecting rod connected with the X1-axis motion module 5 and an X1-axis auxiliary target assembly for auxiliary detection; the structural mounting surface assembly The two panels of 7 are provided with through holes, and the X1 axis connecting rod enters the high and low temperature test chamber 29 through the through holes; the X1 axis auxiliary target assembly is installed at the end of the X1 axis connecting rod and is close to the upper layer to be measured. Sensor assembly 2 corresponds.

In order to better realize the present invention, further, the upper-layer measured proximity sensor assembly 2 includes a sensor mounting seat 11, an upper-layer measured proximity sensor 12, and a butterfly locking screw 13;

The sensor mounting seat 11 is installed on the upper end surface of the inner plane support structure 3, and the upper-layer measured proximity sensor 12 is installed on the sensor mounting seat 11 through a butterfly locking screw 13;

The X1-axis auxiliary target assembly includes a target mounting plate 17, a target mounting column 18, a push-pull link 19, and a butterfly locking screw 13;

The target mounting plate 17 is fixedly connected with the X1 axis connecting rod through the push-pull link 19; the target mounting column 18 is mounted on the side of the target mounting plate 17 that is close to the upper-layer measured proximity sensor 12 through the butterfly locking screw 13, And the position of the upper-layer under-measured proximity sensor 12 corresponds to the Y-axis and Z-axis positions; the target mounting plate 17 has a target mounted on the end surface for sensing the upper-layer under-measured proximity sensor 12 .

In order to better realize the present invention, it further includes an optical installation platform 20 and an open linear grating assembly 21; the optical installation platform 20 is installed on the top surface of the rectangular box of the external support structure 9, and the X1 The axis motion module 5 and the X1-axis closed-loop five-phase motor 6 are installed on the optical installation platform 20, and the open linear grating assembly 21 is installed on the optical installation platform 20, and is connected to the optical installation platform 20 through the signal connector 10. Data acquisition system, instrumentation system connection.

In order to better realize the present invention, further, the X1 axis motion module 5 includes a coupling 22, a bearing 23, a slider 24, a mounting plate 28, and a ball screw 27;

The mounting plate 28 is fixedly mounted on the optical mounting platform 20, the bearing 23 is mounted on the mounting plate 28, and one end is connected to the ball screw 27, and the other end is connected to the output of the X1 axis closed-loop five-phase motor 6 through the coupling 22. shaft connection;

The ball screw 27 is mounted on the upper end of the mounting plate 28, and the mounting plate 28 is provided with an integrated linear ball guide 25, and the slider 24 moves on the mounting plate 28 through the integrated linear ball guide 25;

One end of the X1 axis connecting rod is installed on the slider 24, and the other end passes through the structural mounting surface assembly 7 and enters the high and low temperature test chamber 29 to be connected with the X1 axis auxiliary target assembly.

In order to better realize the present invention, further, a built-in limit switch 26 is further included, and the built-in limit switch 26 is disposed on the mounting plate 28 and located at the end of the ball screw 27 .

Working principle: Control the target to move through the motion mechanism, and adjust the temperature of the high and low temperature test box 29, so as to realize the measurement of different distance feedback under various temperature characteristics of the proximity sensor assembly, and at the same time control the data acquisition system through the industrial computer. The change trend is collected in real time. At the same time, the industrial computer also controls the X-axis motion of the motion mechanism through the motion control system. Finally, the control system software realizes target displacement setting, displacement direction, initial displacement, end displacement, displacement speed and other motion parameter settings and real-time display functions; it has automatic, fast and accurate positioning and position holding functions; target centerline and proximity The center line of the sensor (proximity switch) is aligned; the target is automatically zeroed with the sensing surface of the proximity sensor (proximity switch); the output voltage, resistance and inductance signals of the proximity sensor (proximity switch) are collected and displayed; Test function; test report can be printed automatically. The high and low temperature test chamber 29 is set to operate in the environment of -65~180°C.

The open linear grating assembly 21 is designed as follows:

X1X2 axis linear motion range: 0~50mm, movement rate: 0~10mm/s;

The X-axis linear motion axis adopts the transmission mode of the ball screw 27 and the integrated linear ball guide 25, which converts the rotary motion of the motor into linear motion. The X-axis motion module drives the ball screw 27 through the X-axis closed-loop five-phase drive motor to drive the slider 24 to move back and forth, and the slider 24 pushes the target to slide back and forth, thereby changing the position distance between the target and the proximity sensor.

The device is driven by a ball screw 27, and a ball is placed between the mountain of the male thread and the valley of the female thread of the ball screw 27, and the sliding motion of the ball and the thread surface is converted into a contact motion. Rotation can be achieved with less torque than ordinary drive threads.

The X-axis motion module is equipped with a five-phase closed-loop stepper motor. The step angle (without subdivision): 0.36°. Without subdivision by the driver, it can achieve 2um step movement. Under the circumstance, the movement amount of 0.125um can be realized, and the open linear grating assembly 21 is installed at the same time, the resolution is 0.01um, and the repeatability of positioning is ±0.1um. Using 32-bit industrial computer and control algorithm, it can be accurate to the micron level. Meet the motion index requirements.

Example 2:

On the basis of the above-mentioned Embodiment 1, in order to better realize the present invention, this embodiment further includes a built-in limit switch 26 , and the built-in limit switch 26 is arranged on the mounting plate 28 and located at the position of the ball screw 27 . end.

In order to better realize the present invention, further, the proximity sensor assembly further includes a lower-layer measured proximity sensor assembly 1; the device further includes an X2-axis closed-loop five-phase motor 4, an X2-axis motion module 8, and an X2-axis auxiliary test piece;

The lower-layer measured proximity sensor assembly 1 is installed in the high-low temperature test chamber 29 at the lower layer of the internal plane support structure 3, which is consistent with the upper-layer measured proximity sensor assembly 2;

The X2-axis closed-loop five-phase motor 4, the X2-axis motion module 8, and the X2-axis auxiliary test piece are installed on the bottom end surface of the rectangular box body of the external support structure 9; and the X1-axis motion module 5, the X1-axis closed-loop five-phase motor 6. The structure of the auxiliary test piece of X1 axis corresponds to the same;

The X2-axis closed-loop five-phase motor 4 is connected with the signal connector 10, and the output end of the X2-axis closed-loop five-phase motor 4 is sequentially connected to the X2-axis motion module 8, the X2-axis auxiliary test piece, and the X2-axis auxiliary test piece. In the high and low temperature test box 29 , it corresponds to the under-measured proximity sensor assembly 1 .

In order to better realize the present invention, further, an optical installation platform 20 and an open linear grating assembly 21 are also provided on the bottom end surface of the external support structure 9, and the X2-axis closed-loop five-phase motor 4 and the X2-axis motion module 8 are installed. On the optical installation platform 20 located at the bottom end surface of the external support structure 9 , the open linear grating assembly 21 on the bottom end surface is installed on the side of the X2 axis motion module 8 on the optical installation platform 20 .

Working principle: When the number of proximity sensors in the proximity sensor assembly 2 under test on the upper layer is large, only the target set on the X1 axis is not enough for measurement. Consistently measure the under-measured proximity sensor assembly 1 , and the lower-layer under-measured proximity sensor assembly 1 is correspondingly provided with a measuring device of the X2 axis on the bottom end face of the external support structure 9 .

The other parts of this embodiment are the same as the above-mentioned Embodiment 1, and thus are not repeated here.

Example 3:

This embodiment is based on any of the above-mentioned embodiments 1-2, as shown in FIG. 11 , the measurement and control system is mainly composed of a motion control system and a data acquisition system, and the motion control system structure adopts a servo control system based on PC + motion controller , has the characteristics of high reliability, rapidity, stability, good openness, and strong computing power. The data acquisition device is mainly composed of a program-controlled power supply, a PCI data collector, a PCI digital I/O module, an inductance tester, and a signal conditioning box. In order to meet the control requirements of multi-axis precision control, data transmission and automatic precise positioning of the proximity switch displacement mechanism, the upper control system based on industrial computer, the high-performance servo control system and electrical protection system based on Ethernet bus are designed. The whole control system is composed of upper computer control unit, data acquisition system, LAN network motion controller, open grating feedback system and precision servo drive system. The whole control system adopts the bus structure of the upper and lower computers, and the upper computer adopts the industrial control computer, which mainly realizes the man-machine interaction of the operator, various states of the display system, system parameter configuration and online system supervision, control, maintenance and other functions. The lower computer adopts LAN, RS232, USB and other communications, mainly realizes the functions of on-site signal acquisition, real-time data transmission to the upper computer, and real-time transmission of control instructions to the servo drive. It adopts double closed-loop position control mode to achieve the system's various motion parameters. . The specific test process is shown in Figure 11.

The other parts of this embodiment are the same as any of the above-mentioned Embodiments 1-2, and thus are not repeated here.

Example 4:

On the basis of any one of the above-mentioned embodiments 1-3, in order to better realize the present invention, as shown in FIG. 5 , this embodiment further includes a zero-position stopper 14 ; the zero-position stopper 14 passes through the The screw is height-adjustably mounted on the sensor mounting base 11 on the side facing the target mounting plate 17, and satisfies that when the zero-position stopper 14 is adjusted to the highest height, it can block the target and the detection head of the proximity sensor 12 under test on the upper layer. between.

In order to better realize the present invention, it further includes a guide alignment device, and the guide alignment device includes a positioning guide shaft 15 and a guide column 16;

The positioning guide shaft 15 is mounted on the target mounting plate 17 on the same side as the target mounting post 18;

The guide post 16 is installed on the sensor mounting seat 11 on the same side as the zero position stopper 14, and a slot into which the positioning guide shaft 15 can be inserted is provided in the guide post 16;

When the positioning guide shaft 15 is inserted into the guide post 16 and fixed, the target on the target mounting post 18 and the detection head of the proximity sensor 12 on the upper layer are exactly the same in the Y-axis and Z-axis positions.

Working principle: In order to ensure that the target and the center of the proximity sensor are concentric, the hole positions of the parts of the proximity sensor are fixed during the manufacture of the equipment, and the parts holes of the target mounting column 18 for fixing the target are processed at the same time to ensure that the holes are aligned and concentric. When the structural parts are processed, the precision numerical control is integrally processed to ensure concentricity in the mechanical structure. The parts fixing the proximity sensor do not move, the target mounting plate 17 for fixing the target slides, and the target mounting plate 17 and the sensor mounting seat 11 are positioned and guided by the guide shaft and the guide column to ensure the concentricity during movement.

In order to realize the precise zeroing function of the test system, two zeroing methods are designed, including mechanical zeroing and control zeroing, and the one with better effect is selected according to the test results.

A. Zero setting method of mechanical stop:

In order to ensure the same alignment of the installation positions of each proximity sensor, the zero-position stop 14 is designed. The zero-setting principle of the system is as follows:

(1) Raise the zero stop 14 and fix it;

(2) Install the proximity sensor, and the switch head is close to the zero stop 14;

(3) The target also pushes against the zero position stopper 14. At this time, the zero position of the push-pull link (19) is set to zero by the computer. The distance between the target and the end face of the detection end of the proximity sensor is the thickness of the zero position stopper 14 (6mm);

(4) After the zero position is aligned and set, the zero position stopper 14 moves down to complete the zero alignment.

B. Computer-controlled zero-setting method:

First, through the test method, test the current and torque values when the motor movement encounters a stall. Control the motor to drive the target to move in the direction of the measured proximity sensor, and monitor the motor torque and current value in real time through the industrial computer. Compare this value with the current and torque values tested before. When the current value, torque value and test value are equal, stop the motor and set the current position of the motor to zero.

The other parts of this embodiment are the same as any of the above-mentioned Embodiments 1-3, and thus are not repeated here.

Example 5:

This embodiment is based on any one of the above-mentioned embodiments 1-4, further, the zero position stopper 14 can also be used as an alignment standard plate, and the alignment standard plate stands between the target and the tested proximity sensor, and passes through the Control the motor to push the target against the alignment standard plate, then install the proximity sensor to be tested on the sensor mounting seat 11, close the end face to the alignment standard plate, and tighten the butterfly locking screw 13. At this time, the display readout basis is measured X-axis position size;

Remove the alignment standard board, and the motor pulls the target to move to the starting position of the test. The starting position is the position where the proximity sensor has no induction, and is independently set according to different proximity sensors. Then start the test, slowly push the target closer to the proximity sensor, until all proximity sensors sense one by one. The sensing distance of each proximity sensor will be recorded in time, and by comparing the sensing standard range of the proximity sensor, it can be determined whether the proximity sensor is qualified.

The other parts of this embodiment are the same as any of the above-mentioned Embodiments 1-4, and thus are not repeated here.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the present invention fall into the scope of the present invention. within the scope of protection.

Claims (10)

1. A device for automatically detecting high and low temperature motion characteristics of a proximity sensor is characterized by comprising an industrial personal computer, a motion control system, a data acquisition system, an instrument system, a printer, a high and low temperature test box (29) and a motion mechanism;

the industrial personal computer is respectively connected with the motion control system, the data acquisition system, the instrument system and the printer;

a proximity sensor assembly is arranged in the high-low temperature test box (29); the proximity sensor assembly is respectively connected with the data acquisition system and the instrument system;

the motion mechanism for detecting the proximity sensor assembly is installed on the high-low temperature test box (29) and is connected with a motion control system, a data acquisition system and an instrument and meter system.

2. The device for automatically detecting the high and low temperature motion characteristics of a proximity sensor according to claim 1, wherein the motion mechanism comprises an internal plane support structure (3), an X1 axis motion module (5), an X1 axis closed loop five-phase motor (6), a structure mounting surface assembly (7), an external support structure (9), a signal connector (10);

the internal plane supporting structure (3) is a multi-layer fixed frame body and is arranged in the high-low temperature test box (29), and the bottom of the internal plane supporting structure is fixedly connected with the inside of the high-low temperature test box (29);

the proximity sensor assembly comprises an upper layer proximity sensor assembly (2) to be tested, which is fixedly arranged in a high-low temperature test box (29) and is positioned on the upper end face of an internal plane supporting structure (3);

the structure mounting surface assembly (7) comprises two panels which are respectively arranged on the inner side and the outer side of one side wall of the high-low temperature test box (29), the external supporting structure (9) is a rectangular box body, and one side of the rectangular box body is fixedly connected with the panel of the structure mounting surface assembly (7) arranged on the outer side of the high-low temperature test box (29);

the signal connector (10) is arranged on the external supporting structure (9) and is sequentially connected with an X1 shaft closed-loop five-phase motor (6) and an X1 shaft moving module (5) which are arranged on the upper end face of the external supporting structure (9); the output end of the X1 axis motion module (5) is connected with an X1 axis auxiliary test piece; the X1-axis auxiliary test piece comprises an X1-axis connecting rod connected with the X1-axis motion module (5) and an X1-axis auxiliary target assembly for auxiliary detection; the two panels of the structural mounting surface assembly (7) are provided with through holes, and the X1 shaft connecting rod enters the high-low temperature test box (29) through the through holes; the X1 shaft auxiliary target assembly is arranged at the tail end of the X1 shaft connecting rod and corresponds to the upper layer detected proximity sensor assembly (2).

3. The device for automatically detecting the high and low temperature motion characteristics of the proximity sensor according to claim 2, wherein the upper layer detected proximity sensor assembly (2) comprises a sensor mounting seat (11), an upper layer detected proximity sensor (12), and a butterfly-type locking screw (13);

the sensor mounting seat (11) is mounted on the upper end face of the internal plane supporting structure (3), and the upper-layer detected proximity sensor (12) is mounted on the sensor mounting seat (11) through a butterfly-shaped locking screw (13);

the X1 shaft auxiliary target assembly comprises a target mounting plate (17), a target mounting column (18), a push-pull connecting rod (19) and a butterfly-shaped locking screw (13);

the target mounting plate (17) is fixedly connected with an X1 shaft connecting rod through a push-pull connecting rod (19); the target mounting column (18) is mounted on one side, close to the upper-layer detected proximity sensor (12), of the target mounting plate (17) through butterfly-shaped locking screws (13), and the positions of the target mounting column and the upper-layer detected proximity sensor (12) are correspondingly consistent on the Y-axis position and the Z-axis position; and a target which is used for enabling the upper layer to be detected to be close to the sensor (12) to sense is arranged on the end face of the target mounting plate (17).

4. The apparatus for automatically detecting high and low temperature motion characteristics of a proximity sensor as recited in claim 3, further comprising a zero stop (14); the zero position block (14) is arranged on one side, facing the target mounting plate (17), of the sensor mounting seat (11) in a height-adjustable mode through a threaded piece, and when the zero position block (14) is adjusted to the highest height, the zero position block can be blocked between the target and a detection head of the upper layer detected proximity sensor (12).

5. The device for automatically detecting the high and low temperature motion characteristics of a proximity sensor according to claim 3, further comprising a guiding and aligning device, wherein the guiding and aligning device comprises a positioning guide shaft (15), a guide column (16);

the positioning guide shaft (15) is arranged on the target mounting plate (17) and is arranged on the same side face as the target mounting column (18);

the guide post (16) is arranged on one surface of the sensor mounting seat (11) facing the target mounting plate (17), and a groove into which the positioning guide shaft (15) can be inserted is arranged in the guide post (16);

when the positioning guide shaft (15) is inserted into the guide column (16) for fixation, the target on the target mounting column (18) is exactly corresponding to the detection head of the upper layer detected proximity sensor (12) in the Y-axis and Z-axis positions.

6. The apparatus for automatically detecting high and low temperature motion characteristics of a proximity sensor according to claim 2, further comprising an optical mounting platform (20), an open linear grating assembly (21); optical installation platform (20) are installed the top end face of the rectangle box of outside bearing structure (9), X1 axle motion module (5), X1 axle closed loop five-phase motor (6) are installed on optical installation platform (20), open straight line grating subassembly (21) are installed on optical installation platform (20), and pass through signal connector (10) with data acquisition system, instrument and meter system connect.

7. The device for automatically detecting the high and low temperature motion characteristics of the proximity sensor as claimed in claim 6, wherein the X1 axis motion module (5) comprises a coupling (22), a bearing (23), a slide block (24), a mounting plate (28) and a ball screw (27);

the mounting plate (28) is fixedly mounted on the optical mounting platform (20), the bearing (23) is mounted on the mounting plate (28), one end of the bearing is connected with the ball screw (27), and the other end of the bearing is connected with an output shaft of the X1 shaft closed-loop five-phase motor (6) through a coupler (22);

the ball screw (27) is installed at the upper end of an installation plate (28), an integrated linear ball guide rail (25) is arranged on the installation plate (28), and the sliding block (24) moves on the installation plate (28) through the integrated linear ball guide rail (25);

one end of the X1 shaft connecting rod is installed on the sliding block (24), and the other end of the shaft connecting rod penetrates through the structural installation surface assembly (7) to enter the high-low temperature test box (29) to be connected with the X1 shaft auxiliary target assembly.

8. The device for automatically detecting the high and low temperature motion characteristics of a proximity sensor as recited in claim 7, further comprising a built-in limit switch (26), wherein the built-in limit switch (26) is arranged on the mounting plate (28) at the end of the ball screw (27).

9. The apparatus for automatically detecting high and low temperature motion characteristics of a proximity sensor according to any one of claims 2-8, wherein said proximity sensor assembly further comprises a lower layer proximity sensor assembly (1) to be tested; the device also comprises an X2 shaft closed-loop five-phase motor (4), an X2 shaft movement module (8) and an X2 shaft auxiliary test piece;

the lower-layer detected proximity sensor assembly (1) is arranged in a high-low temperature test box (29) and is positioned at the lower layer of the internal plane supporting structure (3), and the structure of the lower-layer detected proximity sensor assembly is consistent with that of the upper-layer detected proximity sensor assembly (2);

the X2-axis closed-loop five-phase motor (4), the X2-axis motion module (8) and the X2-axis auxiliary test piece are arranged on the bottom end face of a rectangular box body of the external support structure (9); the structure of the test piece is correspondingly consistent with that of an X1 shaft motion module (5), an X1 shaft closed-loop five-phase motor (6) and an X1 shaft auxiliary test piece;

x2 axle closed loop five-phase motor (4) are connected with signal connector (10), X2 axle motion module (8), the supplementary test piece of X2 axle are connected gradually to the output of X2 axle closed loop five-phase motor (4), the supplementary test piece of X2 axle in high low temperature test case (29) with the lower floor is surveyed proximity sensor subassembly (1) and is corresponded.

10. The apparatus for automatically detecting high and low temperature motion characteristics of a proximity sensor according to claim 9, wherein the bottom end face of the external supporting structure (9) is also provided with an optical mounting platform (20) and an open linear grating assembly (21), the X2 axis closed-loop five-phase motor (4) and the X2 axis motion module (8) are mounted on the optical mounting platform (20) located at the bottom end face of the external supporting structure (9), and the open linear grating assembly (21) at the bottom end face is mounted at the side of the X2 axis motion module (8) on the optical mounting platform (20).

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