CN201247077Y

CN201247077Y - Calibration instrument for testing linear sensor

Info

Publication number: CN201247077Y
Application number: CNU200820049891XU
Authority: CN
Inventors: 秦运初
Original assignee: 东莞市敏达测控技术有限公司
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2009-05-27

Abstract

The utility model relates to the technical field of sensors, in particular to a linear sensor testing demarcation device, which comprises a test bench, wherein a sensor bracket which is used to fix a tested sensor is installed on the test bench, a lead screw and a step motor which is used to drive the lead screw are also installed on the test bench, a standard sensor is fixedly installed on the test bench, a moving trolley which is used in testing is arranged on the feed screw in a matching mode, the standard sensor and a tested sensor magnetic head are also installed on the moving trolley simultaneously, when in testing, the tested sensor is fixed on the sensor bracket and is supported through the moving trolley, the step motor is used to control the feed screw to rotate, thereby enabling the moving trolley to move along the feed screw and judging whether performance parameters of the tested sensor accord with production demands or not through comparing the testing results of the tested sensor and the testing results of the standard sensor, the testing efficiency is high, and the results are precise.

Description

Linear transducer test calibration instrument

Technical field:

The utility model relates to sensor technical field, particularly linear transducer test calibration instrument.

Background technology:

Along with current technology develop rapidly, observation and control technology is more and more higher to the requirement with precision height, quick sensor that responds, and all kinds of Linear displacement transducers, liquid level sensor play key effect in TT﹠C system.And the linearity of survey sensor, repeatable accuracy, sensitivity must have first and then perfect detection means, at present domestic checkout equipment good without comparison on high-precision sensor production line.Traditional in the past method mainly is: the artificial establishment tested mathematical model and calculated parameters, take the method for sampling Detection, its shortcoming is low, the poor accuracy of artificial image data efficient, and computing velocity is slow, can not detect by all over products, thereby can not satisfy the production needs.

The utility model content:

The purpose of this utility model is to provide linear transducer test calibration instrument at the deficiencies in the prior art.

For achieving the above object, the utility model adopts following technical scheme:

It comprises the sensor bracket that fixing tested sensor is installed on test board, the test board, the stepper motor of screw mandrel and driving screw mandrel also is installed on the test board, be installed with standard transducer on the test board, be equipped with the travelling car that is used to test on the screw mandrel, travelling car is equipped with standard transducer and tested transducer magnetic head simultaneously.

Control box also is installed on the described test board, and control box also is connected with the external control computer.

On the described test board optical axis guide rail is installed, sensor bracket is fixed on the optical axis guide rail, and travelling car also is installed on the optical axis guide rail.

The beneficial effects of the utility model are, during test tested sensor is fixed on the sensor bracket, the step motor control screw mandrel rotates, thereby travelling car is moved along screw mandrel, compare by the test result of tested sensor and the test result of standard transducer, thereby whether the performance parameter of judging tested sensor meets production requirement, and testing efficiency height, result are more accurate.

Description of drawings:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is a vertical view of the present utility model

Embodiment:

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

The following stated only is a better embodiment of the present utility model, does not therefore limit protection domain of the present utility model.

See accompanying drawing 1,2, the utility model comprises test board 10, the sensor bracket 20 of fixing tested sensor 30 is installed on 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, screw mandrel 50 adopts the high-precision servo screw mandrel, be installed with standard transducer 60 on the test board 10, standard transducer 60 is used for comparing with the test result of tested sensor 30, screw mandrel 50 driving trolley 70, one end of tested sensor 30 places on the supporting base, the other end places on the sensor bracket 20, travelling car 70 is equipped with standard transducer and tested transducer magnetic head simultaneously, when travelling car 70 moves along screw mandrel 50, tested sensor 30 and standard transducer 60 can induce mobile numerical value simultaneously, by the test result of standard transducer 60 with tested sensor 30 is analyzed, whether meet quality of production requirement thereby judge tested sensor 30.

On the described test board 10 control box 80 is installed also, during test, tested sensor 30 is connected with control box 80, control box 80 also is connected with the external control computer, and the external control computer can the join dependency display instrument, as display, oscillograph, voltage digital display meter, high resolving power reometer or the like, can also connect printer, the print data of will being correlated with prints, and can adopt software through pictures, can dynamically show measured data and pattern test curve.

Certainly, aforementioned functional need realize that the control of stepper motor 40 realizes by Programmable Logic Controller by the corresponding detection system program.

On the described test board 10 optical axis guide rail 90 is installed, 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, makes travelling car 70 held stationary when screw mandrel 50 moves.

During test, earlier tested sensor 30 is fixedly installed on the sensor bracket 20, tested sensor 30 is connected with control box 80, tested sensor 30 contacts with travelling car 70, start stepper motor 40, stepper motor 40 is rotated by preset program control screw mandrel 50, travelling car 70 moves along screw mandrel 50 along with the rotation of screw mandrel 50, the test procedure of external control computer is noted each test result respectively, after test is finished, by analyzing the test result of tested sensor 30 and standard transducer 60, thereby judge whether this tested sensor 30 meets quality of production requirement.

The utility model has overcome the shortcoming of prior art, can realize that quick, accurate, convenient, science detects to all over products, has created good condition for improving the quality of products, and can obtain better economic benefits.

Testing feature of the present utility model is as follows:

1, native system is used to detect the linearity of all kinds of linear displacements, liquid level sensor.

2, be applicable to various output formats sensor: 4-20mA, 0-5V, 0-10V, ± 5V, ± 10V and self-defined output format can select in operation interface.

3, be suitable for range ability: 3000MM, as sectionalization test, then range ability can enlarge.

4, can select 1-50 test point, two-way test.

5, show measurement data in real time, and calculate the linearity automatically.

6, test finishes and form can be exported to Excel respectively and preserve and print Chinese and English form.

7, test macro precision height, good reproducibility.

The utility model has been filled up domestic blank, for sensor production provides observing and controlling means fast and accurately and brought into play key effect, has createed good economic benefit.

Claims

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).