阅读说明：本技术 一种用于高g值加速度传感器标定的冲击校准装置及其校准方法 (Impact calibration device and method for high-g-value acceleration sensor calibration ) 是由 杨建� 陈志龙 钱佳彬 于 2019-12-25 设计创作，主要内容包括：本发明涉及一种用于高g值加速度传感器标定的冲击校准装置及其校准方法,其中装置包括测试平台和气路控制系统,测试平台包括安装支架、安装板、轴承座、空气轴承、砧子、气缸筒、弹体芯,砧子上端的冲击输出端贯穿安装于空气轴承中,轴承座内空气轴承的下方设有缓冲垫,台阶限位部位于缓冲垫的下侧,轴承座连接于安装支架的上侧；气缸筒设置于底板下方的安装支架上,气缸筒内设有弹体芯,气缸筒的下端封口且在封口位置连通连接有快速接头,气缸筒的上端为通口,砧子下端冲击接收端伸入于气缸筒上端端口内；气路控制系统的充气支路、放气支路分别与快速接头连通连接；采用空气轴承导向,能很好的减少横向运动和变形,结果更准确稳定。(The invention relates to an impact calibration device for calibrating an acceleration sensor with a high g value and a calibration method thereof, wherein the device comprises a test platform and an air path control system, the test platform comprises a mounting bracket, a mounting plate, a bearing seat, an air bearing, a hammering block, an air cylinder barrel and a projectile body core, an impact output end at the upper end of the hammering block is arranged in the air bearing in a penetrating way, a cushion pad is arranged below the air bearing in the bearing seat, a step limiting part is positioned at the lower side of the cushion pad, and the bearing seat is connected with the upper side of the mounting bracket; the cylinder barrel is arranged on the mounting bracket below the bottom plate, an elastomer core is arranged in the cylinder barrel, the lower end of the cylinder barrel is sealed, a quick connector is communicated and connected with the sealed position, the upper end of the cylinder barrel is a through hole, and the lower end impact receiving end of the anvil extends into the end hole of the upper end of the cylinder barrel; an inflation branch and a deflation branch of the gas path control system are respectively communicated and connected with the quick connector; and the air bearing is adopted for guiding, so that the transverse movement and deformation can be well reduced, and the result is more accurate and stable.)

1. An impact calibration device for calibrating an acceleration sensor with a high g value is characterized by comprising a test platform (1) and a gas circuit control system (2), wherein the test platform (1) comprises a mounting bracket (11), a mounting plate (12), a bottom plate (17), a bearing seat (13), an air bearing (14), an anvil (15), a cylinder barrel (16) and an elastomer core (18), the lower end of the anvil (15) is provided with an impact receiving end (151), the upper end of the bearing seat is provided with an impact output end (152), the middle part of the bearing seat is provided with a step limiting part (153), the air bearing (14) is connected with the bearing seat (13), the impact output end (152) is arranged in the air bearing (14) in a penetrating way, a cushion pad (19) is arranged below the air bearing (14) in the bearing seat (13), the step limiting part (153) is positioned at the lower side of the cushion pad (19), and the bearing seat (13) is connected to the upper side of the mounting bracket (11) through the bottom plate (17); the cylinder barrel (16) is arranged on the mounting bracket (11) below the bottom plate (17) through the mounting plate (12), an elastomer core (18) is arranged in the cylinder barrel (16), the lower end of the cylinder barrel (16) is sealed, a first quick connector (10) is communicated and connected with the sealed position, the upper end of the cylinder barrel (16) is a through hole, and the impact receiving end (151) extends into the port at the upper end of the cylinder barrel (16); an inflation branch and a deflation branch of the gas path control system (2) are respectively communicated and connected with the first quick connector (10); a photoelectric sensor (20) for detecting whether the sensor to be detected is arranged on the impact output end is arranged on one side above the bearing seat (13); a magnetic ring (180) is arranged on the radial periphery of the elastomer core (18), and a magnetic sensor (100) is arranged on the radial outer side of the lower end of the cylinder barrel (16).

2. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, wherein the gas circuit control system (2) comprises a first solenoid valve (21), a vacuum generator (22), a second solenoid valve (23), a T-shaped three-way joint (24), a pneumatic two-way joint (25), a third solenoid valve (26), a gas storage tank (27), a pressure transmitter (28) and a fourth solenoid valve (29), wherein the gas charging branch is formed by connecting the third solenoid valve (26) with the gas storage tank (27) through a pipeline, and then connecting the gas storage tank (27) with the first quick-speed joint (10) through the pressure transmitter (28) and the fourth solenoid valve (29) through pipelines; the air bleeding branch is formed by connecting a second electromagnetic valve (23) with a vacuum generator (22) through a pipeline, and then connecting the vacuum generator (22) with a first quick connector (10) through a first electromagnetic valve (21) through a pipeline; the air pump (30) is connected with the pneumatic duplex piece (25) and then inflates the inflation branch and the deflation branch through the pipeline and the T-shaped three-joint (24).

3. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, wherein an upper nylon ring (181) is sleeved on a radial circumference of an upper end of the elastomer core (18), a lower nylon ring (182) is sleeved on a radial circumference of a lower end of the elastomer core (18), the elastomer core (18) is slidably connected in the cylinder barrel (16) through the upper nylon ring (181) and the lower nylon ring (182), and the magnetic ring (180) is disposed on the elastomer core (18) between the upper nylon ring (181) and the lower nylon ring (182).

4. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, characterized in that the upper end and the lower end of the cylinder barrel (16) are fixedly connected with the mounting plate (12) through a cylinder barrel mounting seat (200), respectively.

5. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, characterized in that the cylinder barrel (16) is connected with a cylinder back cover (160) at the lower end, and the first quick coupling (10) is connected with the cylinder back cover (160).

6. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, characterized in that a felt pad (150) is attached to the end of the impact receiving end (151).

7. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, characterized in that a second first quick coupling (140) is connected to one radial side of the air bearing (14).

8. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, characterized in that the photoelectric sensor (20) and the magnetic sensor (100) are connected with the mounting bracket (11) through connecting brackets.

9. The impact calibration device for high-g-value acceleration sensor calibration according to claim 1, wherein the impact output end (152) penetrates through the cushion pad (19) and then penetrates through the air bearing (14) to extend out to the upper end of the air bearing (14), and the end of the impact output end (152) extending out of the air bearing (14) is provided with a thread.

10. A calibration method using the impact calibration device for high g-value acceleration sensor calibration according to any of claims 1-9, characterized by the steps of:

the method comprises the following steps: the preset pressure of a pressure transmitter (28) is set, a pneumatic duplex piece (25) is opened, a third electromagnetic valve (26) is opened, a gas storage tank (27) stores gas, when the pressure transmitter (28) detects that the pressure is the same as the preset pressure, the third electromagnetic valve (26) is closed, a fourth electromagnetic valve (29) is opened, at the moment, a gas circuit inflates a cylinder barrel (16) through a first quick connector, a bullet core (18) transmits and strikes an impact receiving end (151) of an anvil (15), so that an impact pulse is generated and transmitted to an impact output end (152), and a standard sensor (300) and a detected sensor which are connected to the end part of the impact output end (152) respectively measure an impact pulse value;

step two: when the impact is finished, the fourth electromagnetic valve (29) is closed, the first electromagnetic valve (21) and the second electromagnetic valve (23) are opened, the vacuum generator (22) sucks air into the cylinder barrel (16) to enable the bullet core (18) to descend rapidly, and when the magnetic sensor (100) detects that the bullet core (18) returns to the initial position, the first electromagnetic valve (21) and the second electromagnetic valve (23) are closed, and one-time detection is finished;

when the detected impact pulse of the measured sensor is almost coincident with the impact pulse of the standard sensor (300), the state of the measured sensor is normal; otherwise, the detected sensor is abnormal.

Technical Field

The invention relates to the technical field of sensor calibration, in particular to an impact calibration device and an impact calibration method for calibrating a high-g-value acceleration sensor.

Background

With the continuous development of scientific technology, the high-g-value acceleration sensor is widely applied, and is particularly prominent in military application. The device has the advantages of small volume, strong anti-interference capability, high overload resistance and the like, and can be fully utilized in signal measurement for recording the impact force of a bullet striking a target steel plate and concrete. Sensors play a significant role in test systems, particularly in measuring such high speed transient variables. The accuracy of the test system is directly influenced by the speed of the dynamic response speed of the high-g-value acceleration sensor and the width of the working frequency band.

In the case where the acceleration sensor is widely used, calibration is required periodically. The invention provides a pneumatic piston type impact calibration device and method for calibrating a high-g-value acceleration sensor, and aims to realize quick and effective calibration of the high-g-value acceleration sensor.

The acceleration impact calibration system which can be used commercially is not available in China, and most of the acceleration impact calibration system is in the testing stage of schools and scientific research institutes. Both SPEKTRA, germany and engerco, usa have similar aerodynamic principle acceleration calibration systems, but the specific technical details are also the core secrets. The ensemble is optimized in the aspect of automation of the calibration process.

Disclosure of Invention

The invention aims to provide an impact calibration device and an impact calibration method for calibrating a high-g-value acceleration sensor.

The invention is realized in this way, provide an impact calibrating device used for high g value acceleration transducer calibration, including test platform and gas circuit control system, the test platform includes mounting bracket, mounting panel, bearing bracket, air bearing, hammering block, cylinder barrel, projectile body core, the lower end of the said hammering block is the impact receiving end, its upper end is the impact output end, there are step spacing parts in the middle part, the air bearing is connected with bearing bracket, the impact output end is through installing in the air bearing, there are cushion pads below the air bearing in the bearing bracket, the said step spacing part locates at the underside of the cushion pad, the bearing bracket connects to the upside of the mounting bracket through the bottom plate; the cylinder barrel is arranged on the mounting bracket below the bottom plate through a mounting plate, an elastomer core is arranged in the cylinder barrel, the lower end of the cylinder barrel is sealed, a first quick connector is communicated and connected with the sealed position, the upper end of the cylinder barrel is a through hole, and the impact receiving end extends into the through hole at the upper end of the cylinder barrel; an inflation branch and a deflation branch of the gas path control system are respectively communicated and connected with the first quick connector; a photoelectric sensor for detecting whether the sensor to be detected is arranged on the impact output end is arranged on one side above the bearing seat; the radial circumference of the elastomer core is provided with a magnetic ring, and the radial outer side of the lower end of the cylinder barrel is provided with a magnetic sensor.

Furthermore, the air path control system comprises a first electromagnetic valve, a vacuum generator, a second electromagnetic valve, a T-shaped three-joint, a pneumatic two-joint piece, a third electromagnetic valve, an air storage tank, a pressure transmitter and a fourth electromagnetic valve, wherein the air inflation branch is formed by connecting the third electromagnetic valve with the air storage tank through a pipeline and then communicating and connecting the air storage tank with the first quick joint through the pressure transmitter and the fourth electromagnetic valve through the pipeline; the air bleeding branch is formed by connecting a second electromagnetic valve with a vacuum generator through a pipeline and then connecting the vacuum generator with a first quick connector through a first electromagnetic valve through a pipeline;

the air pump is connected with the pneumatic dual-part and then inflates the inflation branch and the deflation branch through the T-shaped three-joint by pipelines.

Furthermore, an upper nylon ring is sleeved on the radial circumference of the upper end of the projectile body core, a lower nylon ring is sleeved on the radial circumference of the lower end of the projectile body core, the projectile body core is connected in the cylinder barrel in a sliding mode through the nylon rings, and the magnetic ring is arranged on the projectile body core between the upper nylon ring and the lower nylon ring.

Furthermore, the upper end and the lower end of the cylinder barrel are respectively fixedly connected with the mounting plate through a cylinder barrel mounting seat.

Furthermore, the lower end of the cylinder barrel is connected with a cylinder rear cover, and the first quick connector is connected with the cylinder rear cover and serves as an interface for releasing or filling air in the cavity between the lower end of the elastic body core in the cylinder barrel and the cylinder rear cover.

Further, a felt pad is attached to the end of the impact receiving end.

Furthermore, a second quick coupling is connected to one radial side of the air bearing in a communicating manner.

Furthermore, the photoelectric sensor and the magnetic sensor are connected with the mounting bracket through the connecting bracket.

Furthermore, the impact output end penetrates through the buffer pad and then penetrates through the buffer pad to extend out of the upper end of the air bearing through the air bearing, and a thread is arranged at one end of the impact output end, which extends out of the air bearing.

A calibration method of the impact calibration device for calibrating the high-g-value acceleration sensor comprises the following steps:

the method comprises the following steps: setting the preset pressure of a pressure transmitter, opening a pneumatic duplex piece, starting a third electromagnetic valve, storing gas by a gas storage tank, closing the third electromagnetic valve and starting a fourth electromagnetic valve when the pressure transmitter detects that the pressure is the same as the preset pressure, wherein the gas path inflates the cylinder barrel through a first quick connector, the projectile body core transmits and strikes an impact receiving end of a anvil so as to generate an impact pulse and transmits the impact pulse to an impact output end, and a measured sensor and a standard sensor which are connected to the end part of the impact output end respectively measure an impact pulse value;

step two: when the impact is finished, the fourth electromagnetic valve is closed, the first electromagnetic valve and the second electromagnetic valve are opened, the vacuum generator sucks air into the cylinder barrel to enable the bullet core to rapidly descend, and when the magnetic sensor detects that the bullet core returns to the initial position, the first electromagnetic valve and the second electromagnetic valve are closed, and one-time detection is finished;

when the detected impact pulses of the measured sensor and the standard sensor are almost coincident, the state of the measured sensor is normal; otherwise, the detected sensor is abnormal.

Compared with the prior art, the impact calibration device and the calibration method for calibrating the high-g-value acceleration sensor have the following beneficial effects:

the air bearing is adopted for guiding, so that transverse movement and deformation can be well reduced, and the result is more accurate and stable;

the pneumatic piston type impact mode is adopted, so that larger impact force can be realized, namely, after the stored gas of the gas storage tank reaches the set pressure, the stored gas is released to the cylinder barrel through the gas charging branch, and the bullet core in the cylinder barrel is enabled to be launched to strike the impact receiving end of the anvil; different pressure values can be set, so that various pulse ranges are formed, and the range capable of being calibrated is larger;

the photoelectric sensor is used for detecting whether the anvil and the detected sensor exist or not, if the anvil does not exist, the air passage is cut off for ventilation, and accidents caused by the fact that the projectile body rushes out of the cylinder barrel shaped like a Chinese character mi are prevented; if the detected sensor does not exist, sending out a signal prompt; the magnetic sensor is used for detecting whether the projectile body returns to the original position or not, and the initial position of the projectile body core can influence the experimental result;

the cylinder related accessories are adopted, so that most of parts are standardized, and the manufacturing cost is reduced; the pressure of the gas path is indirectly controlled by the pressure transmitter, so that the operation is simpler and more convenient.

Drawings

FIG. 1 is a schematic diagram of the impact calibration device for high-g acceleration sensor calibration according to the present invention;

FIG. 2 is a schematic view of the air circuit control system of FIG. 1;

FIG. 3 is a schematic view of the test platform of FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a first schematic view of the connection of the base plate, the bearing seat, the air bearing and the anvil;

FIG. 6 is a second schematic view of the connection of the base plate, the bearing seat, the air bearing and the anvil;

FIG. 7 is a schematic view of the anvil;

FIG. 8 is a schematic view of the connection of the cylinder barrel to the mounting plate;

fig. 9 is a schematic view of the structure of the core of the projectile.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.