CN215491851U

CN215491851U - Sensor for testing dynamic detection device

Info

Publication number: CN215491851U
Application number: CN202121808758.XU
Authority: CN
Inventors: 李莹; 翟琼劼
Original assignee: Shanghai Institute of Quality Inspection and Technical Research
Current assignee: Shanghai Institute of Quality Inspection and Technical Research
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2022-01-11
Anticipated expiration: 2031-08-04

Abstract

The utility model discloses a sensor for testing a dynamic detection device, wherein a fixed end of the dynamic detection device is fixedly connected with the upper end of an upper fixed plate, the lower end of the upper fixed plate is connected with the upper end of a partition plate through a spring, the lower end of a lower fixed plate is fixedly connected with the output end of the dynamic detection device, a laser displacement sensor and an acceleration sensor are arranged at the upper end of the lower fixed plate, an elastic body is fixed between the partition plate and the lower fixed plate, grooves are formed in the elastic body in a left-right staggered mode along the up-down direction, strain gauges are attached to the inner sides of the grooves and are connected with a data acquisition amplifier after being connected in series, the laser displacement sensor and the acceleration sensor are connected with the data acquisition amplifier, and the data acquisition amplifier is connected with an upper computer; the utility model has the advantages of simple structure, high sensitivity and good reliability, ensures the accuracy of test data, can realize simultaneous detection of multiple parameters, improves the metering efficiency, and provides necessary technical conditions for research of influence quantity among the multiple parameters.

Description

Sensor for testing dynamic detection device

Technical Field

The utility model relates to the field of sensors, in particular to a sensor for testing a dynamic detection device.

Background

The back-to-back sine comparison method dynamic detection device of the force sensor is a testing device capable of realizing multi-parameter output of force values, displacement, impact, vibration and the like, and can be used for carrying out fatigue tests on key components, new materials and the like. At present, the performance detection of the device can only be measured one by one through a single parameter, and the simultaneous measurement cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sensor for testing a dynamic detection device, which can realize simultaneous measurement of multiple parameters under the same working condition.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a sensor for testing a dynamic detection device comprises a dynamic detection device fixed end and a dynamic detection device output end and is characterized by comprising an upper fixing plate, a spring, a partition plate, an elastic body and a lower fixing plate, wherein the dynamic detection device fixed end is fixedly connected with the upper end of the upper fixing plate, the lower end of the upper fixing plate is connected with the upper end of the partition plate through the spring, the partition plate and the lower fixing plate are arranged at intervals from top to bottom, the lower end of the lower fixing plate is fixedly connected with the dynamic detection device output end, a laser displacement sensor and an acceleration sensor are arranged at the upper end of the lower fixing plate, the elastic body is fixedly arranged between the partition plate and the lower fixing plate, the elastic body is provided with grooves in a left-right staggered mode along the up-down direction, strain gauges are attached to the inner sides of the grooves, the strain gauges are connected with the input end of a data acquisition amplifier after being connected in series, the laser displacement sensor and the acceleration sensor are both connected with the input end of the data acquisition amplifier, and the output end of the data acquisition amplifier is connected with the upper computer.

Furthermore, the number of the springs is four, and the springs are uniformly distributed on four corners of the upper fixing plate and the partition plate.

Furthermore, the inner side of the groove is semicircular, and the outer side of the groove is rectangular.

Further, the laser displacement sensor and the acceleration sensor are respectively positioned on the left side and the right side of the elastic body.

Furthermore, the partition board is provided with a hole at a position corresponding to the laser displacement sensor, and laser of the laser displacement sensor reaches the upper fixing plate through the hole of the partition board so as to measure displacement change between the upper fixing plate and the lower fixing plate.

The utility model has the advantages of simple structure, high sensitivity and good reliability, ensures the accuracy of test data, can realize simultaneous detection of multiple parameters, improves the metering efficiency, and provides necessary technical conditions for research of influence quantity among the multiple parameters.

Drawings

FIG. 1 is a schematic side view of the present invention;

fig. 2 is a schematic perspective view of the present invention.

Reference numerals:

1 dynamic detection device fixing end, 2 upper fixing plate, 3 spring, 4 partition plate, 5 elastic body,

6 strain gauge, 7 laser displacement sensor, 8 acceleration sensor, 9 lower fixing plate,

10 output end of dynamic detection device, 11 data acquisition amplifier, 12 upper computer,

13 holes and 14 grooves.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model discloses a sensor for testing a dynamic detection device, which comprises a dynamic detection device fixing end 1 and a dynamic detection device output end 10, as shown in figure 1, the sensor comprises an upper fixing plate 2, springs 3, a partition plate 4, an elastic body 5 and a lower fixing plate 9, the dynamic detection device fixing end 1 is fixedly connected with the upper end of the upper fixing plate 2, the lower end of the upper fixing plate 2 is connected with the upper end of the partition plate 4 through the springs 3, the number of the springs 3 is four, and the springs 3 are uniformly distributed on the four corners of the upper fixing plate 2 and the partition plate 4.

Baffle 4 and bottom plate 9 interval set up from top to bottom, and bottom plate 9's lower extreme and dynamic detection device output 10 fixed connection, and bottom plate 9's upper end is equipped with laser displacement sensor 7 and acceleration sensor 8, and laser displacement sensor 7 and acceleration sensor 8 are located the left and right sides of elastomer 5 respectively, and laser displacement sensor 7,

acceleration sensor

8 and 5 intervals of elastomer are not less than 10 mm.

Elastomer 5 is fixed to be set up between baffle 4 and bottom plate 9, and elastomer 5 is crisscross set up slottedly 14 about following the upper and lower direction, and the inboard of groove 14 is the semicircle, and the outside of groove 14 is the rectangle, and foil gage 6 is pasted to the inboard of groove 14, and foil gage 6 establishes ties the back and is connected with data acquisition amplifier 11's input, and laser displacement sensor 7 and acceleration sensor 8 all are connected with data acquisition amplifier 11's input, and data acquisition amplifier 11's output and host computer 12 are connected.

As shown in fig. 1, the partition plate 4 is provided with a hole 13 at a position corresponding to the laser displacement sensor 7, and the laser of the laser displacement sensor 7 reaches the upper fixing plate 2 through the hole 13 of the partition plate 4 to measure the displacement change between the upper fixing plate 2 and the lower fixing plate 9, and as shown in fig. 2, the partition plate 4 is also provided with a hole 13 at a position corresponding to the acceleration sensor 8.

In the implementation process, the fixing plate, the spring 3 and the partition plate 4 form a buffer component, the elastic body 5, the strain gauge 6, the laser displacement sensor 7, the acceleration sensor 8 and the lower fixing plate 9 form a sensing component, and the buffer component and the sensing component can be detached for use and applied to different test states.

When the dynamic force value is detected, the sensing component and the buffer component of the sensor are used together, the sensor is fixed on the dynamic detection device through bolts, wherein the upper fixing plate 2 and the fixed end 1 of the dynamic detection device are fixed through the bolts, and the lower fixing plate 9 and the output end 10 of the dynamic detection device are fixed through the bolts.

In the use process, the output end 10 of the dynamic detection device outputs a force value and a displacement, a sensing part of the sensor is connected with the output end, an acceleration sensor 8 of the sensing part detects frequency and acceleration information of the output end, an elastic body 5 and a strain gauge 6 of the sensing part detect the force value, a laser displacement sensor 7 of the sensing part detects the moving distance, and signals of the acceleration sensor 8, the strain gauge 6 and the laser displacement sensor 7 are transmitted to an upper computer 12 through a data acquisition amplifier 11 to be processed.

When the static force value is detected, the buffer part of the sensor is detached, the sensor is fixed on the dynamic detection device through bolts, wherein the top of the elastic body 5 is fixed with the fixed end 1 of the dynamic detection device, the lower fixing plate 9 is fixed with the output end 10 of the dynamic detection device, and at the moment, the sensor only outputs the force value and does not detect the vibration frequency and the displacement.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sensor for testing a dynamic detection device comprises a dynamic detection device fixed end and a dynamic detection device output end and is characterized by comprising an upper fixing plate, a spring, a partition plate, an elastic body and a lower fixing plate, wherein the dynamic detection device fixed end is fixedly connected with the upper end of the upper fixing plate, the lower end of the upper fixing plate is connected with the upper end of the partition plate through the spring, the partition plate and the lower fixing plate are arranged at intervals from top to bottom, the lower end of the lower fixing plate is fixedly connected with the dynamic detection device output end, a laser displacement sensor and an acceleration sensor are arranged at the upper end of the lower fixing plate, the elastic body is fixedly arranged between the partition plate and the lower fixing plate, the elastic body is provided with grooves in a left-right staggered mode along the up-down direction, strain gauges are attached to the inner sides of the grooves, the strain gauges are connected with the input end of a data acquisition amplifier after being connected in series, the laser displacement sensor and the acceleration sensor are both connected with the input end of the data acquisition amplifier, and the output end of the data acquisition amplifier is connected with the upper computer.

2. The sensor according to claim 1, wherein the number of the springs is four, and the springs are uniformly distributed at four corners of the upper fixing plate and the partition plate.

3. The sensor for testing a dynamic sensing device of claim 1, wherein the inside of the slot is a semicircle and the outside of the slot is a rectangle.

4. The sensor for testing a dynamic sensing device of claim 1, wherein the laser displacement sensor and the acceleration sensor are respectively located at left and right sides of the elastic body.

5. The sensor for testing the dynamic sensing device as claimed in claim 4, wherein the partition plate is perforated at a position corresponding to the laser displacement sensor, and the laser of the laser displacement sensor passes through the hole of the partition plate to reach the upper fixing plate to measure the displacement change between the upper fixing plate and the lower fixing plate.