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Pressure sensor for measuring hydraulic pressure

A pressure sensor, hydraulic pressure technology, applied in the direction of measuring fluid pressure, measuring fluid pressure through mechanical components, measuring fluid pressure through electromagnetic components, etc., can solve problems such as troublesome recalibration, loss of pressure transducer, false measurement signal, etc.

Inactive Publication Date: 2004-06-30
CATERPILLAR INC
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  • Summary
  • Abstract
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Problems solved by technology

The disadvantage of such a construction is that the calibration of the pressure transducer can be lost relatively quickly at high pressures to be measured and in the event of temperature fluctuations in the ambient temperature, since the shape of the metal diaphragm itself changes in the event of pressure peaks or temperature fluctuations and / or changes in position, which can lead to falsification of the measurement signal from the measurement results provided by the resistance strain gauges up to
As a result, the pressure transducer in known pressure sensors has to be replaced more often or has to be recalibrated in a complex manner

Method used

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  • Pressure sensor for measuring hydraulic pressure

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Embodiment Construction

[0013] 10 in the figure represents a pressure sensor as a whole, such as for measuring the hydraulic pressure of an underground mining hydraulic system, which is within the inherently safe electric power range. The pressure sensor 10 has a connecting element 11 which can be connected to a pressure sensor connection of a liquid cylinder (not shown) or the like, and a sensor housing 12 in which a hydroelectric pressure transducer 13 is arranged. The pressure transducer is loaded with hydraulic pressure next to the pressure sensing connection via a pressure channel 14 extending through the connecting element 11 and converts the pressure value into an electrical measurement signal which can be directed to a control device, a remote measuring table or a remote display.

[0014] According to the invention, the pressure transducer 13 has a ceramic load cell 15, which essentially comprises an approximately circular ceramic body 16 with a plurality of strain gauges 17 arranged thereon,...

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Abstract

The pressure cell device according to the invention serves for measuring hydraulic pressures in hydraulic mining devices in an inherently secure service region. It is provided with a connection element which can be connected to a pressure reception connection and with a sensor housing, on the inside of which is arranged a hydroelectric pressure transducer which is pressurised by the hydraulic pressure present at the pressure reception connection and converts this into an electrical signal. So as to ensure high measurement accuracy over a long operating period, without it being necessary to have exchanges of the pressure transducer or its new calibration, it is provided according to the invention that the pressure transducer comprises a ceramic pressure measuring cell.

Description

technical field [0001] The invention relates to a pressure sensor for measuring hydraulic pressure, which comprises a connecting element that can be connected to a pressure sensing joint and a sensor housing, in which a hydraulic pressure transducer is arranged, and the pressure transducer The transducer is loaded by hydraulic pressure against the pressure sensing joint and converts the hydraulic pressure into an electrical signal of pressure. The pressure sensor according to the invention is used in particular in mining hydraulics in the inherently safe power range, and preferably in hydraulic or oil hydraulic systems. Background technique [0002] This type of pressure sensor is used in mining to measure the pressure of mining hydraulic devices, such as the pressure of the pillar of the mobile support or other hydraulic systems or hydraulic transmissions, which are commonly seen in underground devices or systems. By means of the pressure sensor, the measured pressure valu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L7/08G01L9/00
CPCG01L9/0051G01L7/082
Inventor 塞巴斯蒂安·M·蒙德里赖纳·福兰克延斯·蒂舍特于尔根·彻佩
Owner CATERPILLAR INC
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