Ultra-high pressure intelligent pressure transmitter

An ultra-high pressure, transmitter technology, applied in the measurement of fluid pressure, measurement device, fluid pressure measurement by changing ohmic resistance, etc., can solve the problems of short service life, low test accuracy, low output signal, etc. Various properties, the effect of improving tear resistance

Active Publication Date: 2011-03-16
SHENZHEN MAXONIC AUTOMATION CONTROL CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, it has the following disadvantages. First, the output signal is low, generally only 0.5 ~ 1mV / V, and the signal-to-noise ratio is also extremely low; The zero point drifts seriously; third, the service life is short, and it is prone to breakage under thousands of high-voltage impacts, causing the transmitter to fail to work; fourth, due to the structural reasons of the hollow cylindrical pressure sensitive element, its test is accurate under high pressure degree less than 0.2%

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Embodiment Construction

[0017] Such as figure 1 , image 3 As shown, processing in the design of the flat diaphragm pressure sensitive element 1 is the key to the implementation of the present invention. The processing of the elastic flat diaphragm 9 needs to ensure the flatness of the elastic flat diaphragm at the bottom of the pressure tube hole 8 and control the elasticity. The thickness of the flat diaphragm T, the value of T is determined by the size of the pressure to be measured, the higher the range, the larger the T, the value of the invention is 1.50mm≤T≤3.00mm, and the thickness error is controlled within 0.01mm; The parallelism of the control plane diaphragm, the allowable error is within the range of 0.005mm; it is necessary to ensure that there is a transition arc surface with a radius of R at the junction of the pressure pipe hole 8 and the bottom plane. The size of R is determined by the measured pressure Determined by the size, the value of the transition arc surface of the present i...

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Abstract

The invention discloses an ultrahigh voltage intelligent pressure transmitter, which consists of a flat film type pressure sensitive element, a thermistance, a bridge type resistance strain gauge, an outer pipe, an HART protocol intelligent board, a sealing terminal and a cable, wherein the pressure sensitive part of the flat film type pressure sensitive element is an elastic flat film which is arranged on the bottom plane of a hollow cylindrical pressure leading hole. The measuring range of the ultrahigh voltage intelligent pressure transmitter can reach 1,000 MPa, and 1,400 MPa to the highest. Under ultrahigh voltage (1,000MPa) pressure, the intelligent pressure transmitter has strong repeated impact resistance and overvoltage impact resistance. The thermistance used for measuring the temperature of a medium is arranged on a pressure sensitive core, and can quickly and accurately sense and measure the temperature of the medium. The HART protocol intelligent board is adopted to carryout digitalized processing on data and output a standard signal. The invention provides a high performance and high reliability ultrahigh voltage intelligent pressure transmitter for occasions needing measuring the ultrahigh pressure.

Description

Technical field: [0001] The invention relates to a transmitter for measuring the pressure of a fluid medium, and is particularly suitable for ultrahigh pressure intelligent pressure transmitters in ultrahigh pressure measurement and control equipment with a pressure of up to 1000 MPa. Background technique: [0002] At present, in the field of ultra-high pressure measuring instruments, for pressure sensitive components, a hollow cylindrical pressure sensitive component method (such as figure 2 Shown). This kind of element is to set the pressure sensitive part on the outer wall of the hollow cylindrical pressure hole. Its working principle is: when the pressure of the measured medium is used on the inner wall of a hollow cylindrical pressure sensitive element, the hollow cylinder will undergo radial expansion and deformation due to the force. This situation causes the resistance value of the resistance strain gauge attached to the outer wall to change to generate an output signal,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L9/04G01L19/04
Inventor 谢大刚
Owner SHENZHEN MAXONIC AUTOMATION CONTROL CO LTD
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