CN201247077Y - Linear sensor testing calibration instrument - Google Patents

Abstract

The utility model relates to the technical field of sensors, in particular to a linear sensor test and calibration instrument, which comprises a test bench, a sensor bracket on which a sensor to be tested is fixedly installed on the test bench, a lead screw and a stepping motor driving the lead screw are also installed on the test bench, a standard sensor is fixedly installed on the test bench, a moving trolley for testing is arranged on the lead screw, and the moving trolley is simultaneously installed with the standard sensor and a magnetic head of the sensor to be tested; during testing, the sensor to be tested is fixed on the sensor bracket and supported by the moving trolley, the stepping motor controls the lead screw to rotate, so that the moving trolley moves along the lead screw, and the test result of the sensor to be tested is compared with the test result of the standard sensor, so as to judge whether the performance parameters of the sensor to be tested meet the production requirements, and the test efficiency is high and the result is more accurate.

Description

Linear Sensor Test Calibrator

Technical field:

The utility model relates to the technical field of sensors, in particular to a linear sensor testing calibration instrument.

Background technique:

With the rapid development of today's technology, measurement and control technology has higher and higher requirements for sensors with high precision and fast response. Various linear displacement sensors and liquid level sensors play a key role in the measurement and control system. To measure the linearity, repeatability, and sensitivity of sensors, advanced and complete detection methods must be provided. At present, there is no relatively good detection equipment in the high-precision sensor production line in China. In the past, the traditional method was mainly: artificially build a test mathematical model and calculate various parameters, and adopt the method of sampling inspection. The disadvantages are that the manual data collection is inefficient, poor in accuracy, and slow in calculation speed. It is impossible to inspect all products, so it cannot meet the requirements Production needs.

Utility model content:

The purpose of the utility model is to provide a linear sensor testing and calibrating instrument aiming at the deficiencies of the prior art.

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

It includes a test bench, a sensor bracket for fixing the sensor to be tested is installed on the test bench, a screw and a stepping motor for driving the screw are installed on the test bench, a standard sensor is fixedly installed on the test bench, and a There is a mobile trolley for testing, and the mobile trolley is equipped with the standard sensor and the sensor head under test at the same time.

A control box is also installed on the test bench, and the control box is also connected with an external control computer.

An optical axis guide rail is installed on the test platform, the sensor bracket is fixed on the optical axis guide rail, and the moving trolley is also installed on the optical axis guide rail.

The beneficial effect of the utility model is that the tested sensor is fixed on the sensor bracket during the test, and the stepper motor controls the rotation of the screw rod, so that the moving car moves along the screw rod, and the test results of the tested sensor and the test of the standard sensor are passed. The results are compared to judge whether the performance parameters of the tested sensor meet the production requirements, the test efficiency is high, and the result is more accurate.

Description of drawings:

Fig. 1 is a structural representation of the utility model

Fig. 2 is the top view of the utility model

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described.

The following descriptions are only preferred embodiments of the present utility model, and therefore do not limit the protection scope of the present utility model.

See accompanying drawing 1,2, the utility model comprises test bench 10, and the sensor bracket 20 that fixes sensor 30 to be tested 30 is installed on the test bench 10, and the stepping of screw mandrel 50 and driving screw mandrel 50 are also installed on test bench 10. The motor 40 and the screw mandrel 50 adopt high-precision servo screw mandrels. A standard sensor 60 is fixedly installed on the test bench 10. The standard sensor 60 is used for comparison with the test results of the tested sensor 30. The screw mandrel 50 drives the trolley 70. One end of the sensor 30 is placed on the supporting seat, and the other end is placed on the sensor bracket 20. The moving trolley 70 is equipped with a standard sensor and a magnetic head of the sensor under test at the same time. The sensor 60 can sense the movement value at the same time, and by comparing and analyzing the test results of the standard sensor 60 and the tested sensor 30, it can be judged whether the tested sensor 30 meets the production quality requirements.

Described test bench 10 is also equipped with control box 80, during testing, tested sensor 30 is connected with control box 80, and control box 80 is also connected with external control computer, and external control computer can be connected relevant display instrument, as display, oscilloscope , voltage digital display meter, high-resolution ammeter, etc., and can also be connected to a printer to print out the relevant print data. Graphical software can be used to dynamically display the measured data and graphical test curves.

Of course, the aforementioned functions need to be realized through corresponding test system programs, and the control of the stepper motor 40 is realized through a programmable controller.

The optical axis guide rail 90 is installed on the test bench 10, the sensor bracket 20 is fixed on the optical axis guide rail 90, and the mobile trolley 70 is also installed on the optical axis guide rail 90, so that the mobile trolley 70 remains stable when moving along the screw rod 50 .

During the test, first the sensor under test 30 is fixedly installed on the sensor bracket 20, and the sensor under test 30 is connected with the control box 80 at the same time, the sensor under test 30 is in contact with the mobile trolley 70, and the stepper motor 40 is started to make the stepper motor 40 controls the rotation of the screw mandrel 50 according to a predetermined program, and the mobile trolley 70 moves along the screw mandrel 50 along with the rotation of the screw mandrel 50. The test program of the external control computer records each test result respectively. After the test is completed, by analyzing the measured sensor 30 and the test results of the standard sensor 60 to determine whether the tested sensor 30 meets the production quality requirements.

The utility model overcomes the disadvantages of the prior art, can realize rapid, accurate, convenient and scientific detection for all products, creates good conditions for improving product quality, and can obtain better benefits.

The test characteristics of the present utility model are as follows:

1. This system is used to detect the linearity of various linear displacement and liquid level sensors.

2. Sensors suitable for various output formats: 4-20mA, 0-5V, 0-10V, ±5V, ±10V and custom output formats can be selected in the operation interface.

3. Applicable measuring range: 3000MM. If the test is carried out in sections, the measuring range can be expanded.

4. 1-50 test points can be selected for two-way test.

5. Real-time display of measurement data and automatic calculation of linearity.

6. After the test, the reports can be exported to Excel to save and print out the Chinese and English reports.

7. The test system has high precision and good repeatability.

The utility model fills up the gap in the country, provides fast and accurate measurement and control means for sensor production and plays a key role, and creates good economic benefits.

Claims (3)

1, linear transducer test calibration instrument, it is characterized in that: it comprises the sensor bracket (20) that fixing tested sensor (30) is installed on test board (10), the test board (10), the stepper motor (40) of screw mandrel (50) and driving screw mandrel (50) also is installed on the test board (10), be installed with standard transducer (60) on the test board (10), be equipped with the travelling car (70) that is used to test on the screw mandrel (50), travelling car (70) is equipped with standard transducer and tested transducer magnetic head simultaneously.

2, linear transducer test calibration instrument according to claim 1 is characterized in that: control box (80) also is installed on the described test board (10), and control box (80) also is connected with the external control computer.

3, linear transducer test calibration instrument according to claim 1, it is characterized in that: optical axis guide rail (90) is installed on the described test board (10), sensor bracket (20) is fixed on the optical axis guide rail (90), and travelling car (70) also is installed on the optical axis guide rail (90).

Images