Quasi-static calibration device for multichannel stress pressure sensors

A pressure sensor and strain-type technology, which is applied in the field of quasi-static calibration devices for multi-channel strain-type pressure sensors, can solve the problems of static calibration of pressure sensor errors, low efficiency, etc.

Inactive Publication Date: 2013-06-26
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0003] The purpose of the present invention is to provide a quasi-static calibration device for a multi-channel strain type pressure sensor, whic

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  • Quasi-static calibration device for multichannel stress pressure sensors

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Embodiment Construction

[0009] A quasi-static calibration device for a multi-channel strain type pressure sensor, comprising: an oil cylinder 5, a piston 2, hydraulic oil 4, and also includes: a weight 1, a piston adapter 3 and a calibrator 6. The oil cylinder 5 is placed on a horizontal platform, and there are one or more mounting threaded holes at the same height on the side wall of the oil cylinder 5 and one or more sensors to be calibrated are installed correspondingly; the sensors to be calibrated and the calibrator 6 are installed at the same height of the oil cylinder 5 ; The piston adapter 3 is a cylindrical device with external threads, and the piston adapter 3 is threaded with the top of the oil cylinder 5 . The hydraulic oil 4 is injected into the oil cylinder 5, the piston 2 is placed in the piston adapter 3, and the weight 1 is suspended on the piston 2.

[0010] The heavy hammer 1 falls freely from a certain height and hits the piston 2 on the oil cylinder 5 to compress the hydraulic oi...

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Abstract

The invention discloses a quasi-static calibration device for multichannel stress pressure sensors. The quasi-static calibration device comprises an oil cylinder (5), a piston (2), hydraulic oil (4), a counter weight (1), a piston adapter (3) and a calibrator (6), wherein the oil cylinder (5) is disposed on a horizontal platform, the calibrator (6) is connected with the side wall of the oil cylinder (5) in a threaded manner, and the piston adapter (3) is connected with the top of the oil cylinder (5) in a threaded manner. The hydraulic oil (4) is injected into the oil cylinder (5), the piston (2) is disposed in the piston adapter (3), and the counter weight (1) is suspended on the piston (2). The counter weight (1) impacts the piston (2) on the oil cylinder (5), the piston (2) compresses the hydraulic oil (4) to generate pressure pulse, and the pulse stresses on the calibrator (6) and a stress pressure sensor to be calibrated. The sensors can be subjected to quasi-static calibration through the counter weight, dynamic measuring error is reduced and sensor calibration efficiency is improved.

Description

technical field [0001] The invention relates to a calibration device for a strain type pressure sensor, in particular to a quasi-static calibration device for a multi-channel strain type pressure sensor. Background technique [0002] At present, the calibration of strain-type pressure sensors at home and abroad usually adopts static calibration, and the calibration device generally includes weights, pistons, oil cylinders, and hydraulic oil. The frequency response characteristics of strain-type pressure sensors make it impossible to track instantaneously when measuring dynamic pressure, and there will be a transition process. Therefore, there is a difference between the sensitivity obtained by static calibration and the sensitivity obtained by dynamic calibration, resulting in dynamic measurement errors. In addition, static calibration generally adopts 5-point or 9-point calibration, and each pressure calibration point requires a pressure source to maintain for three to fiv...

Claims

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Application Information

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IPC IPC(8): G01L27/00
Inventor 苏晓岗周中岳周建
Owner BEIJING MECHANICAL EQUIP INST
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