阅读说明：本技术 加速度传感器的气抛冲击式校准装置及其使用方法 (Air-throwing impact type calibration device of acceleration sensor and using method thereof ) 是由 柯其利 于 2020-05-06 设计创作，主要内容包括：本发明公开了一种加速度传感器的气抛冲击式校准装置及其使用方法,其中加速度传感器的气抛冲击式校准装置包括：冲击筒,其内贯通设置竖直延伸的冲击通道,所述冲击筒底部的筒口处设有与所述冲击通道相通、且进气方向竖向向上的进气口,所述冲击筒上端的筒壁处开设有与所述冲击通道相通的排气口；弹丸,其活动放置于所述冲击通道内；压缩空气供给设备,其通过输气管路与所述进气口相连；用于承载加速度传感器的砧块,其活动放置于所述冲击筒底部的筒口处。(The invention discloses an air-throwing impact type calibration device of an acceleration sensor and a use method thereof, wherein the air-throwing impact type calibration device of the acceleration sensor comprises the following components: the impact barrel is internally provided with a vertically extending impact channel in a run-through manner, a barrel opening at the bottom of the impact barrel is provided with an air inlet which is communicated with the impact channel and has an air inlet direction which is vertically upward, and a barrel wall at the upper end of the impact barrel is provided with an air outlet which is communicated with the impact channel; a projectile movably disposed within the impact channel; the compressed air supply equipment is connected with the air inlet through an air transmission pipeline; and the anvil block is used for bearing the acceleration sensor and is movably placed at the bottom of the impact cylinder at the cylinder opening.)

1. An air-throwing impact type calibration device of an acceleration sensor is characterized by comprising:

the impact barrel (1) is internally provided with a vertically extending impact channel (1a) in a run-through manner, an air inlet (1b) which is communicated with the impact channel and is vertically upward in the air inlet direction is arranged at a barrel opening at the bottom of the impact barrel, and an air outlet (1c) which is communicated with the impact channel is arranged at the barrel wall at the upper end of the impact barrel;

a projectile (2) movably disposed within the impact channel;

the compressed air supply equipment (3) is connected with the air inlet (1b) through an air transmission pipeline (4); and

and the anvil block (5) is used for bearing an acceleration sensor and is movably placed at the barrel mouth at the top of the impact barrel.

2. The air-throwing impact type calibration device of the acceleration sensor according to claim 1, wherein a vertically arranged guide sleeve (7) is fixed in a tube mouth of the top of the impact tube (1), the anvil block (5) is supported above the guide sleeve (7), and a part of the anvil block (5) is vertically slidably inserted in the guide sleeve (7).

3. The air-drop impact calibration device of an acceleration sensor according to claim 2, characterized in that the top of the guide sleeve (7) is fixedly connected with a cushion pad (8).

4. The air-drop impact calibration device of the acceleration sensor according to claim 2, characterized in that the inner wall of the guide sleeve (7) is made of flexible material, and the anvil (5) is in pressing contact with the inner wall of the guide sleeve (7).

5. Air-thrown impact calibration device of acceleration sensor according to any one of claims 1 to 4, characterized in that the anvil (5) is provided above with an anti-roll-over (9) fixed opposite to the impact cylinder (1).

6. Air-drop impact calibration device of an acceleration sensor according to claim 5, characterized in that the impact cylinder (1) and the anti-roll-over stand (9) are both fixedly arranged on a base frame (10).

7. The air-throwing impact calibration apparatus of an acceleration sensor according to claim 6, wherein the base frame (10) comprises a clamping block (10a) clamping and fixing the impact barrel (1).

8. Air-throwing impact calibration device of an acceleration sensor according to claim 6, characterized in that said base frame (10) comprises a vertically extending upright, said anti-tip rack (9) being fixedly connected to said upright and the vertical position of said anti-tip rack (9) on said upright being adjustable; the anti-overturning device is characterized in that the anti-overturning frame (9) and the base frame (1) are provided with a position switch (6) for detecting the height of the anti-overturning frame (9), the gas transmission pipeline (4) is provided with a gas supply electromagnetic valve, and the position switch (6) is connected with the gas supply electromagnetic valve through a circuit.

9. The air-throwing impact type calibration device of the acceleration sensor as claimed in claim 1, wherein a pressure regulating valve, a digital display pressure sensor and a time relay are arranged on the air transmission pipeline (4).

10. Use of the air-drop impact calibration device of the acceleration sensor according to any of claims 1 to 9, characterized in that it comprises:

arranging benchmark acceleration sensor and measured acceleration sensor on hammering block (2), utilizing compressed air supply equipment (3) to impact passageway (1a) and dash into compressed air, pellet (2) upward movement under compressed air's impact strikes hammering block (5), and hammering block (5) drive benchmark acceleration sensor with measured acceleration sensor makes the synchronous upward accelerated motion, compares benchmark acceleration sensor's acceleration response value with measured acceleration sensor's acceleration response value, analysis measured acceleration sensor response's the degree of accuracy.

Technical Field

The application relates to an air-throwing impact type calibration device of an acceleration sensor and a using method thereof.

Background

The mechanical metering calibration device is an important guarantee for detecting and calibrating the accuracy of a mechanical environment detection element (such as an acceleration sensor).

The existing acceleration sensor calibration system can only complete the calibration of a small-range acceleration sensor and has the defects of complex structure, large size, poor repeatability and poor test accuracy.

Disclosure of Invention

The purpose of the application is: the air-throwing impact type calibration device of the acceleration sensor and the use method thereof are provided, and the aim is to solve the calibration problem of the high acceleration sensor.

The technical scheme of the application is as follows:

an air-drop impact calibration device of an acceleration sensor, comprising:

the impact barrel is internally provided with a vertically extending impact channel in a run-through manner, a barrel opening at the bottom of the impact barrel is provided with an air inlet which is communicated with the impact channel and has an air inlet direction which is vertically upward, and a barrel wall at the upper end of the impact barrel is provided with an air outlet which is communicated with the impact channel;

a projectile movably disposed within the impact channel;

the compressed air supply equipment is connected with the air inlet through an air transmission pipeline; and

and the anvil block is used for bearing the acceleration sensor and is movably placed at the bottom of the impact cylinder at the cylinder opening.

On the basis of the technical scheme, the air-throwing impact type calibration device further comprises the following preferable scheme:

a vertically arranged guide sleeve is fixed in a cylinder opening at the top of the impact cylinder, the anvil block is supported above the guide sleeve, and part of the anvil block is vertically inserted into the guide sleeve in a sliding manner.

The top of the guide sleeve is fixedly connected with a cushion pad.

The inner wall of the guide sleeve is made of flexible materials, and the anvil block is in extrusion contact with the inner wall of the guide sleeve.

And an anti-overturning frame which is relatively fixed with the impact cylinder is arranged above the anvil block.

The impact cylinder and the anti-turnover frame are both fixedly arranged on the base frame.

The base frame comprises a clamping block for clamping and fixing the impact barrel.

The base frame comprises a vertical rod extending vertically, the anti-overturning frame is fixedly connected with the vertical rod, and the vertical position of the anti-overturning frame on the vertical rod is adjustable; the anti-overturning device is characterized in that the anti-overturning frame and the base frame are provided with position switches for detecting the height of the anti-overturning frame, the gas transmission pipeline is provided with a gas supply electromagnetic valve, and the position switches are connected with the gas supply electromagnetic valve through circuits.

And the gas transmission pipeline is provided with a pressure regulating valve, a digital display pressure sensor and a time relay.

The use method of the air-throwing impact type calibration device of the acceleration sensor comprises the following steps:

arranging a reference acceleration sensor and a measured acceleration sensor on the anvil block, flushing compressed air into the impact channel by utilizing compressed air supply equipment, enabling the projectile to move upwards under the impact of the compressed air to impact the anvil block, driving the reference acceleration sensor and the measured acceleration sensor to synchronously move upwards in an accelerated manner by the anvil block, comparing an acceleration sensing value of the reference acceleration sensor with an acceleration sensing value of the measured acceleration sensor, and analyzing the accuracy of the sensing of the measured acceleration sensor.

The application has the following beneficial effects:

1. the application for this kind of acceleration sensor's calibrating device adopts the pneumatic formula of throwing impact structure on, blows the pellet through compressed air and moves up, utilizes the pellet striking hammering block and drives acceleration sensor on the hammering block and move up with higher speed, can provide the acceleration of 200 ~ 200000m/s 2 scope, and pulse width range 0.1 ~ 5ms is applicable to high acceleration sensor's detection calibration very much to confirm high acceleration sensor's performance.

2. The air delivery pipeline is provided with the pressure regulating valve, the digital display pressure sensor, the time relay and other devices, so that repeatable precision control can be realized on compressed air filled into the impact barrel, multiple detections under the same working condition can be carried out on the same acceleration sensor, and the accuracy of detection and calibration of the acceleration sensor is improved.

3. A vertically-arranged guide sleeve is fixed in a cylinder opening at the top of the impact cylinder, the anvil block is supported above the guide sleeve, and a part of the anvil block is vertically inserted into the guide sleeve in a sliding manner, so that the possibility of lateral deviation in the process that the anvil block drives the acceleration sensor to move upwards is reduced.

4. The inner wall of the guide sleeve is made of flexible materials, the anvil block is in extrusion contact with the flexible inner wall of the guide sleeve, the gap between the anvil block and the inner wall of the guide sleeve is reduced, and the possibility of lateral deviation of the anvil block and the acceleration sensor in the calibration process is further reduced.

5. An anti-overturning frame fixed opposite to the impact cylinder is arranged above the anvil block. When the anvil block is used, after the anvil block moves up to the anti-turnover frame, the anvil block is blocked by the anti-turnover frame to move down, so that the anvil block is prevented from rushing into the environment to hurt detection personnel.

6. The top of the guide sleeve is fixedly connected with a cushion pad. The downwards moving anvil block firstly touches the flexible cushion pad to release kinetic energy, and the impact force on the guide sleeve is reduced.

7. The device has small size, large instantaneous energy and wide calibration range.

Drawings

The present application will be further described with reference to the following drawings and specific embodiments:

fig. 1 is a schematic structural diagram of an overall structure of an air-drop impact type calibration device of an acceleration sensor in an embodiment of the present application;

fig. 2 is a schematic partial structural diagram of an air-drop impact calibration apparatus of an acceleration sensor in an embodiment of the present application.

Wherein: 1-impact cylinder, 1 a-impact channel, 1 b-air inlet, 1 c-air outlet, 2-projectile, 3-compressed air supply equipment, 4-air pipeline, 5-anvil block, 6-position switch, 7-guide sleeve, 8-buffer pad, 9-anti-turnover frame and 9 a-quick-twisting handle.

Detailed Description

Fig. 1 and 2 show a specific embodiment of the air-drop impact calibration device of the acceleration sensor of the present application, which mainly comprises an impact cylinder 1, a projectile 2, a compressed air supply device 3 and an anvil 6. Wherein:

a vertically extending impact channel 1a is arranged in the impact barrel 1 in a penetrating manner. An air inlet 1b which is communicated with the impact channel and has an air inlet direction which is vertically upward is arranged at the opening of the bottom of the impact cylinder. The wall of the upper end of the impact cylinder is provided with an exhaust port 1c communicated with the impact channel. The projectile 2 is movably arranged in the impact channel of the impact barrel 1. The compressed air supply device 3 is connected with the air inlet 1b through an air pipeline 4 and is used for charging compressed air into the impact channel 1a to push the shot 2 to move. The anvil block 5 is used as a carrier of the acceleration sensor to be detected and is movably placed at the bottom of the impact cylinder at the cylinder opening.

When the device is used, a reference acceleration sensor and a measured acceleration sensor can be arranged on an anvil block 2, compressed air is injected into an impact channel 1a by using a compressed air supply device 3, a projectile 2 moves upwards under the impact of the compressed air to impact the anvil block 5, the anvil block 5 drives the reference acceleration sensor and the measured acceleration sensor to synchronously move upwards in an accelerated manner, the acceleration induction value of the reference acceleration sensor and the acceleration induction value of the measured acceleration sensor are compared, the induction accuracy of the measured acceleration sensor is analyzed, and if the difference between the acceleration induction values of the reference acceleration sensor and the acceleration induction value of the measured acceleration sensor is larger, the fact that the accuracy of the measured acceleration sensor is poor is indicated, and calibration is needed; if the acceleration induction values are very close to each other, the accuracy of the measured acceleration sensor is high.

The reference acceleration sensor and the measured acceleration sensor are simultaneously arranged on the anvil block 2, and move upwards along with the anvil block 2 in a synchronous acceleration mode without being influenced by compressed air. The actual acceleration of the two acceleration sensors during moving upwards is necessarily the same, and theoretically, the acceleration induction value of the reference acceleration sensor is equal to the actual value, so that whether the measured acceleration sensor reaches the standard can be judged only by comparing the respective acceleration induction values of the two acceleration sensors during the acceleration moving upwards.

Of course, the reference acceleration sensor and the acceleration measuring sensor can be tested separately from each other. Specifically, the method comprises the following steps: the method comprises the steps that a reference acceleration sensor is arranged on an anvil block, compressed air with specific parameters is filled into an impact barrel, a projectile moves upwards under the impact of the compressed air, after the projectile impacts an upper anvil block, the anvil block is subjected to upward impact force to drive the reference acceleration sensor to accelerate and move upwards synchronously, and the reference acceleration sensor senses the acceleration A (considered as an actual value) of the projectile in the acceleration and upwards moving process. And then, the standard acceleration sensor is taken down, the measured acceleration sensor is arranged on the anvil block, compressed air with the same parameters is filled into the impact cylinder, and the measured acceleration sensor senses the upward moving acceleration B at the moment. Comparing B with A, if the difference between B and A is larger, the acceleration sensor to be measured is unqualified, and the calibration is needed; if the difference between the two is small, the tested sensor is qualified.

In order to reduce the possibility of lateral displacement during the process of the anvil 5 moving the acceleration sensor upwards, the present embodiment fixes a vertically arranged guide sleeve 7 in the top opening of the impact cylinder 1. The anvil 5 is supported above the guide sleeve 7, and a portion of the anvil 5 is vertically slidably inserted into the guide sleeve 7.

To reduce the gap between the anvil 5 and the inner wall of the guide sleeve 7, and thereby further reduce the possibility of lateral deflection, the inner wall of the guide sleeve 7 is made of a flexible material, and the anvil 5 is in pressing contact with the flexible inner wall of the guide sleeve 7.

Without limiting the upward travel of the anvil 5, the risk of injury to the anvil may easily occur. In this respect, in this embodiment, a rollover protection bracket 9 is provided above the anvil block 5, which is fixed relative to the impact cylinder 1. When in use, after the anvil block 5 moves upwards to the position of the anti-turnover frame 9, the anvil block is blocked by the anti-turnover frame 9 to move downwards, so that the anvil block 5 is prevented from rushing into the environment to hurt the detection personnel.

The anvil block 5 moves rapidly downwards under the stop of the roll-over preventing frame 9, and if the downwards moving anvil block 5 directly collides with the guide sleeve 7 violently, the service life of the guide sleeve 7 is greatly shortened. In this respect, the present embodiment is fixedly connected with a cushion pad 8 at the top of the guide sleeve 7. The downwardly moving anvil 5 first touches the flexible cushion 8 to release kinetic energy, relieving the impact force on the guide sleeve 7.

As mentioned above, the anti-tip rack 9 and the impact cylinder 1 are relatively fixed, in particular: the rollover protection frame 9 and the impact cylinder 1 are both fixedly arranged on a base frame 10. The base 10 serves as a carrier for the anti-tip rack 9 and the impact cylinder 1, and carries and holds the anti-tip rack 9 and the impact cylinder 1. Specifically, the method comprises the following steps:

the base frame 10 comprises a clamping block 10a and a vertically extending upright. The holding block 10a holds and fixes the impact cylinder 1. The anti-turning frame 9 is fixedly connected with the upright stanchion, and the vertical position of the anti-turning frame 9 on the upright stanchion is adjustable. The anti-turnover frame 9 is provided with a quick-twisting handle 9a, and the height of the anti-turnover frame can be conveniently adjusted along the vertical rod by means of the quick-twisting handle 9 a.

The anti-turning frame 9 and the base frame 1 are provided with a position switch 6 for detecting the height of the anti-turning frame 9, the gas transmission pipeline 4 is provided with a gas supply electromagnetic valve, and the position switch 6 is in circuit connection with the gas supply electromagnetic valve on the gas transmission pipeline 4. When the height of the anti-overturn frame 9 is too large, the air supply electromagnetic valve is closed, and the air transmission pipeline 4 cannot send the compressed air provided by the compressed air supply equipment 3 into the impact barrel 1. Ensure that the anti-roll-over frame can only generate impact action when being in a safe position. Generally, it is ensured that the depth of insertion of the anvil 5 into the guide sleeve 7 is greater than the vertical distance between the bottom of the anti-roll-over bracket 9 and the top of the anvil 5.

In addition, the gas transmission pipeline 4 is also provided with a pressure regulating valve, a digital display pressure sensor, a time relay and other devices, so that repeatable precision control of compressed air filled into the impact barrel is realized.

It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present application, and the present application is not limited thereto. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.