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Impact step pressure generation method

A generation method and impact technology, applied in the direction of measuring fluid pressure, measuring devices, instruments, etc., can solve the problem that high-amplitude pressure is difficult to maintain, it is difficult to generate step pressure signal, and there is no method for step pressure signal, etc. problem to achieve good results

Inactive Publication Date: 2016-02-03
ZHONGBEI UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, since the liquid pressure transmission medium is difficult to be compressed and the high-amplitude pressure is difficult to maintain, it is difficult to generate an ideal step pressure signal
[0005] The existing dynamic calibration methods using liquid as the pressure transmission medium all generate quasi-delta function pulse pressure signals, and there is no method that can generate step pressure signals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. Impact type step pressure generation method

[0028] The impact step pressure generation method of this example can be used figure 1 , image 3 , Figure 4 Jointly shown, figure 1 Shown is a schematic diagram of the structure of the impact-type step pressure generating device. The method of this example is to use the impact-type step pressure generating device to generate the impact-type step pressure, such as figure 1 As shown, the impact block 1 is launched by the launching mechanism, so that the impact block 1 moves at high speed and hits the pressure chamber cover 3, and the pressure chamber cover 3 moves into the pressure chamber 4 to compress the pressure transmission medium 5 in the pressure chamber 4. The volume of the pressure transmission medium 5 is When the pressure decreases and the pressure increases, a rising edge of the pressure signal is generated; the pressure chamber cover 3 moves a certain distance into the pressure chamber 4 and is ...

Embodiment 2

[0029] Embodiment 2. Impact type step pressure generation method

[0030] The impact step pressure generation method of this example is given by figure 1 , image 3 , Figure 4 Jointly show that the difference between the impact type step pressure generation method of this example and the impact type step pressure generation method in embodiment one is: 1. The launch mechanism selects an electromagnetic launch mechanism, such as an electromagnetic gun; 2. The size of the impact block 1 is long ×diameter=0.5m×Φ0.75m, the initial velocity is 60m / s; 3. The pressure transmission medium 5 is kerosene liquid. The rest of the impact type step pressure generation method of this example is the same as that described in Embodiment 1 and will not be repeated.

Embodiment 3

[0031] Embodiment 3. Impact type step pressure generation method

[0032] The impact step pressure generation method of this example is given by figure 1 , image 3 , Figure 4 It is jointly shown that the difference between the impact step pressure generation method of this example and the impact step pressure generation method of Embodiment 1 and Embodiment 2 is as follows: 1. The size of the impact block 1 is length×diameter=0.5m×Φ0. 625 meters, the initial velocity is 40 m / s; 2. The pressure medium 5 chooses CO 2 gas. The rest of the impact type step pressure generating method of this example is the same as that described in Embodiment 1 and Embodiment 2, and will not be repeated.

[0033] Non-limiting examples of the impact type step pressure generating device in the second part are as follows:

[0034] Embodiment 1. Impact type step pressure generating device

[0035] The impact type step pressure generating device of this example can be used figure 1 , image 3 ...

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Abstract

The invention provides three technical schemes, namely, an impact type step pressure generating method and device and a pressure sensor dynamic calibration device, and belongs to the technical field of step pressure and pressure sensor dynamic calibration. The impact type step pressure generating method includes the steps of emitting a hitting block through an emitting mechanism, hitting against a pressure cavity cover to press a pressure transmitting medium, and generating a step pressure signal. The impact type step pressure generating device comprises the emitting mechanism, the hitting block, a stress wave filtering mat, the pressure cavity cover, a pressure cavity, a locking mechanism, the pressure transmitting medium, a pipeline and a valve. The dynamic calibration device further comprises a calibrated pressure sensor, a standard pressure sensor, a signal cable and a data acquisition and record mechanism. The step pressure signal serves as a signal source, measurement and comparison are conducted through the standard pressure sensor and the calibrated pressure sensor, and the dynamic calibration result of the calibrated pressure sensor is obtained; the method and device have the advantages that the step pressure signal is generated by pressing and locking the pressure transmitting medium, the generating device is easy and convenient to use, and different step pressure signals can be flexibly obtained.

Description

technical field [0001] The impact type step pressure generation method disclosed by the present invention belongs to the technical field of step pressure signals and the dynamic calibration technology field of pressure sensors, and specifically relates to the impact type step pressure signal generation method and its generating device, and the impact type step pressure generation method A method for producing a dynamic calibration device for a pressure sensor. Background technique [0002] In the dynamic test of pressure physical parameters, the measured signal often has the characteristics of large amplitude, short rise time, and narrow pulse width, which puts high requirements on the dynamic performance of the pressure sensor used in the test. The frequency band and dynamic sensitivity of the pressure sensor are crucial technical indicators. Before the test, it is necessary to use the method of dynamic calibration to determine whether the technical indicators of the selec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L27/00
Inventor 丰雷马铁华尤文斌丁永红王燕梁志剑张艳兵
Owner ZHONGBEI UNIV