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High-impact acceleration sensor dynamic characteristic tracing calibrating method

A technology of acceleration sensor and dynamic characteristics, which is used in the testing/calibration of speed/acceleration/shock measurement equipment, speed/acceleration/shock measurement, instruments, etc.

Inactive Publication Date: 2009-06-17
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sinusoidal vibration comparison method can obtain the complete frequency response curve of the sensor, and my country has successively established national benchmark devices for high-frequency, medium-frequency, and low-frequency vibrations. The highest frequency can reach 100kHz, but this calibration method can only be used at low g values However, the calibration frequency that can be realized by the shock excitation method is within 50kHz, and the calibration amplitude is within 10 4 g below, and mostly used to calibrate the resonant frequency of the sensor

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  • High-impact acceleration sensor dynamic characteristic tracing calibrating method

Examples

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Embodiment 1

[0035] Embodiment 1. Traceable Calibration Method for Dynamic Characteristics of High Impact Acceleration Sensor

[0036] The traceability calibration method of the dynamic characteristics of the high shock acceleration sensor in this example is based on the traceability calibration of the high shock acceleration sensor being calibrated under the wide pulse condition (the wide pulse condition is that the pulse width is greater than 50μs), and then adopts the narrow pulse ( The narrow pulse condition is that the pulse width is less than 10μs) to excite the high-shock acceleration sensor, and the frequency response characteristics of the high-shock acceleration sensor are measured by testing or measuring instruments, so as to realize the traceability calibration of its dynamic characteristics. The method for using the wide pulse to excite the high impact acceleration sensor is: the minimum width t of the excitation wide pulse required for traceability calibration of the high impa...

Embodiment 2

[0046] Embodiment 2. Traceable Calibration Method for Dynamic Characteristics of High Impact Acceleration Sensor

[0047] The traceability calibration method of the dynamic characteristics of the high shock acceleration sensor in this example differs from the traceability calibration method of the dynamic characteristics of the high shock acceleration sensor in Embodiment 1 in that: the natural frequency f of the calibrated high shock acceleration sensor given in this embodiment is 180kHz, For example, the 8309 sensor of Danish B&K company, the calibration method and process are the same as those described in the first embodiment. The traceability calibration method of the dynamic characteristics of the high impact acceleration sensor in this example is the same as that described in the first embodiment, and will not be repeated.

Embodiment 3

[0048] Embodiment 3. Traceable Calibration Method for Dynamic Characteristics of High Impact Acceleration Sensor

[0049] The traceable calibration method of the dynamic characteristics of the high impact acceleration sensor in this example differs from the traceable calibration method of the dynamic characteristics of the high impact acceleration sensor in Embodiment 1 and Embodiment 2 in the following points: 1. Establish the calibrated high impact according to formula (1) A wide pulse traceability calibration system or device for an acceleration sensor, which uses a Hopkinson rod 4 with a diameter of Φ25mm and a length of 1.6m to generate an amplitude of (0.5~1.0)×10 5 g, the excitation pulse with a pulse width of 100-250 μs. 2. The present embodiment provides that the natural frequency f of the calibrated high-shock sensor is 120kHz, such as the 350A96 sensor of the U.S. PCB company, the rest of the traceability calibration method of the dynamic characteristics of the high...

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Abstract

The invention discloses a traceable calibration method for dynamic characteristics of a high-shock acceleration transducer, and belongs to the technical field of acceleration transducer measurement. The traceable calibration method is as follows: a very narrow pulse is used for exciting the high-shock acceleration transducer on the basis of realizing the traceable calibration under the condition of a broad pulse for the high-shock acceleration transducer to be calibrated to measure a frequency response characteristic of the high-shock acceleration transducer by a test or metrologic instrument and realize the traceable calibration of the dynamic characteristics thereof. A formula of minimum calibration broad pulse width t1 and a formula of maximum narrow excitation pulse width t2 which are required by the traceable calibration are deduced by the traceable calibration method according to different natural frequencies of the high-shock acceleration transducer with higher calibrated natural frequency (above 50kHz) and great acceleration amplitude (up to 2.0*10<5>g). The new technological breakthroughs are meaningful and valuable to the calibration theories and the practical application. The traceable calibration method for the dynamic characteristics of the high-shock acceleration transducer is worthy application and popularization.

Description

1. Technical field [0001] The traceable calibration method for the dynamic characteristics of a high-impact acceleration sensor disclosed by the invention belongs to the technical field of acceleration sensor measurement, and specifically relates to a traceable calibration method for the dynamic characteristics of a high-impact acceleration sensor. This method can calibrate the dynamic characteristics of the high impact acceleration sensor in the whole working bandwidth range, and realize traceability. 2. Background technology [0002] High impact acceleration sensors are widely used in the acceleration measurement of the collision process, especially in the process of projectile penetrating hard targets. A newly designed high-shock acceleration sensor needs to study its dynamic characteristics during the development process, and the existing high-shock acceleration sensor also needs to calibrate its dynamic characteristics after multiple uses. In addition, during the impac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00
Inventor 祖静范锦彪王燕张红艳徐鹏林祖森李庆丰康凤霞
Owner ZHONGBEI UNIV
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