Multi-path pressure setting device of soil engineering pressure sensor
A pressure sensor and calibration device technology, applied in the direction of measuring devices, measuring fluid pressure, instruments, etc., can solve the problems of poor sensor positioning consistency, low sensor calibration efficiency, long calibration cycle, etc., and achieve simple structure, quick installation, and stable performance reliable effect
Active Publication Date: 2014-06-25
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
[0004] The above-mentioned simple special-purpose calibration device uses a single transition joint directly connected to the piston pressure gauge, so the efficiency of sensor calibration is low, and the calibration cycle is long when calibration is performed in batches.
At the same time, the positioning consistency of the sensor in the simple calibration device is poor, and the sensor calibration effect is greatly affected by the operator
In addition, when the sensor is installed in a simple device, it usually needs multiple adjustments to achieve a better sealing effect and complete the calibration of the sensor, so it is not easy to operate
Method used
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[0025] The present invention will be further described below in conjunction with accompanying drawing:
[0026] Such as Figure 1-Figure 6 As shown, the geotechnical pressure sensor multi-channel pressure calibration device of the present invention includes a pressure conversion device 2, a sensor selector 3 and a digital meter 5, and the pressure conversion device 2 includes a base 21, a pressure tube 1 and a sensor installation device 6, and the base 21 is provided with a plurality of sensor terminal blocks 25 corresponding to the sensor installation device 6 one by one. The sensor installation device 6 includes a transition joint 62, an "O" type sealing ring 65, a limit ring 64, a pressure plate 63 and a pressure head 61, and the transition The joint 62 is composed of the lower connecting pipe 62B and the upper cavity 62A, the pressure pipe 1 is installed on the base 21 through the mounting frame 22, and the pressure pipe 1 leads to a joint (i.e. figure 1 with figure 2 T...
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The invention discloses a multi-path pressure setting device of a soil engineering pressure sensor. The device comprises a pressure conversion device, a sensor selector and a digital multimeter, wherein the pressure conversion device comprises a base, a pressure tube and sensor installation devices, a connector is led out from the pressure tube and is used for being connected with a pressure generating device, the pressure tube is provided with the sensor installation devices in a communicated mode, cavities communicated with the pressure tube and used for installation of the soil engineering pressure sensor are arranged in the sensor installation devices, and the signal output end of the soil engineering pressure sensor is connected with the digital multimeter through the sensor selector. According to the device, the sensor installation devices are installed on the pressure tube, set pressure can be provided for multiple soil engineering pressure sensors simultaneously, quick selection of the soil engineering pressure sensor and display of the set pressure can be achieved through the sensor selector and the digital multimeter, and accordingly pressure of the soil engineering pressure sensors can be set quickly, and pressure setting uniformity and efficiency of the soil engineering pressure sensors are obviously improved.
Description
technical field [0001] The invention relates to a calibrating device for a geotechnical pressure sensor, in particular to a multi-channel pressure calibrating device for a geotechnical pressure sensor. Background technique [0002] In geotechnical centrifugal model tests, it is usually necessary to use geotechnical pressure sensors such as earth pressure sensors and pore water pressure sensors to monitor various parameters of the model under centrifugal force. However, due to their small size, these geotechnical pressure sensors are usually flat. The existing universal pressure sensor calibration method cannot calibrate this type of sensor. Therefore, in the process of developing and using this type of sensor, it is urgent to design a special calibration device according to the characteristics of the sensor. [0003] At present, some units have adopted a relatively simple special calibration device, that is, a simple transition joint is connected to the piston pressure gauge...
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Login to View More IPC IPC(8): G01L25/00G01L27/00
Inventor 王小龙王军孟念湘吴俊李代生李明海曾永菊侯建军何建军
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS