Digital manometer for accurately measuring pressure to be measured

A precise measurement, digital technology, applied in the direction of measuring fluid pressure, measuring fluid pressure through electromagnetic components, measuring devices, etc., can solve the problems of low precision and high power consumption of pressure gauges, so as to improve accuracy and long-term stability, prolong Effects of service life and power consumption reduction

Inactive Publication Date: 2011-06-15
苏州工业园区广福汽保机电设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a digital pressure gauge that accurately measures the

Method used

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  • Digital manometer for accurately measuring pressure to be measured
  • Digital manometer for accurately measuring pressure to be measured
  • Digital manometer for accurately measuring pressure to be measured

Examples

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Embodiment Construction

[0016] Such as figure 1 As shown, the digital pressure gauge for accurately measuring the measured pressure includes MCU1 and pressure sensor 4. The pressure sensor 4 is connected to the signal conditioning circuit 3, and the signal conditioning circuit 3 is connected to the analog-to-digital converter 2. The analog-to-digital converter 2 is a 14-bit The analog-to-digital converter, the analog-to-digital converter 2 is connected to the MCU1; the MCU1 is also connected to the EPROM 5, the 3V power supply 7 and the display 6 respectively.

[0017] The pressure sensor 4 (diffusion silicon pressure transmitter) is used to replace the spring tube mechanical pressure gauge. Since the required measurement range is (0-40MPa) and the accuracy of 0.4% FS is required, the diffusion silicon pressure sensor is used and the existing signal is used. The conditioning chip analyzes the existing problems such as nonlinearity and temperature drift, and establishes a compensation method for them,...

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PUM

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Abstract

The invention relates to a digital manometer for accurately measuring pressure to be measured, comprising a MCU (Microprogrammed Control Unit) and a pressure sensor. The pressure sensor is connected with a signal conditioning circuit, the signal conditioning circuit is connected to an analog-to-digital converter, and the analog-to-digital converter is connected to the MCU which is also connected to an EPROM (Electrically Programmable Read-Only Memory), a power supply of 3V and a monitor. By adopting the MCU for low-voltage power supply, the oscillator frequency of the MCU is decreased, the system power supply is automatically switched off to decrease power consumption when no measurement is carried out; a high-linearity 14-bit analog-to-digital converter is adopted to add a temperature comprehension circuit to a pressure transmitter and reduce environmental introduce errors; and errors nonlinearly introduced by the pressure sensor are corrected through the technologies of zero point correction and multi-point correction when data is processed and measured so as to prolong service life to the maximum extend.

Description

technical field [0001] The invention relates to a precision instrument for measuring relatively large pressure, in particular to a digital pressure gauge with extremely low power consumption, good reliability and capable of accurately measuring the measured pressure in a wide range. Background technique [0002] Today, with the rapid development of science and technology, new technologies and new products emerge one after another, especially the development of electronic technology has brought great changes to life. The development of computer microprocessor technology has made many dreams of human beings come true. In the instrument and instrument industry, it has developed from single-function analog instruments to digital, multi-functional and intelligent. Traditional pressure gauges rely on elastic sensitive elements to produce elastic deformation with changes in pressure. Mechanical pressure gauges use sensitive components such as spring tubes (Bourdon tubes), diaphrag...

Claims

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Application Information

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IPC IPC(8): G01L9/00
Inventor 白联军
Owner 苏州工业园区广福汽保机电设备有限公司
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