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Resistance strain type sensor feed circuit and voltage control method

A technology of resistance strain type and power supply circuit, which is applied in the direction of using electric/magnetic devices to transmit sensing components, etc., can solve the problems of power consumption and other problems, achieve the effects of reducing power consumption, improving service life, and reducing system operation and maintenance costs

Inactive Publication Date: 2009-05-13
ZHEJIANG XIANXIN SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing measurement circuit uses the system power supply to supply power to the sensor, that is, the power supply to the bridge is directly added to the bridge arm E by the system power supply. Since the sensor will consume a certain amount of power consumption as a resistor, the power consumption of the measurement circuit is by the power supply E and the resistor R 1 , R 2 , R 3 , R 4 Determined by the value, which limits the application in some low power consumption occasions

Method used

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  • Resistance strain type sensor feed circuit and voltage control method
  • Resistance strain type sensor feed circuit and voltage control method
  • Resistance strain type sensor feed circuit and voltage control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: with reference to attached figure 1 and 2 . The power supply circuit of the resistance strain sensor includes the sensor and the power supply connected to the sensor bridge, the power supply terminal and the ground terminal of the resistance strain sensor are connected in parallel with the power output terminal and the ground terminal of the controllable power supply; the controllable power supply A regulator is a low-dropout linear regulator, or an electronic device or circuit that has the function of turning on and off the power supply.

Embodiment 2

[0013] Embodiment 2: On the basis of Embodiment 1, the control method of the power supply circuit voltage of the resistance strain sensor, the operating voltage of the resistance strain sensor is provided by the controllable power supply after the system power supply is stabilized, and the controllable power supply is turned off control.

Embodiment 3

[0014] Embodiment 3: with reference to attached figure 2 and 3 . On the basis of Example 1, for figure 2 As a specific example, an IO port is used to control the power supply circuit of a low-dropout linear regulator (LDO).

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Abstract

The invention relates to a power supply circuit of a resistance strain gauge transducer which performs measurement by the resistance strain gauge transducer, and a voltage control method thereof. The circuit comprises the transducer and a power supply which is in bridge connection with the transducer; and a power supply terminal and an earth terminal of the resistance strain gauge transducer are connected with a power supply output terminal and the earth terminal of the controllable power supply in parallel. The invention provides the power supply circuit of the resistance strain gauge transducer, which lowers the power consumption of various applications, improves the service life of the power supply, and reduces the operation cost and maintenance cost of a system.

Description

technical field [0001] The invention relates to a power supply circuit and a voltage control method of a resistance strain sensor for measurement by a resistance strain sensor, and belongs to the field of manufacturing a bridge sensor measuring circuit. Background technique [0002] The resistance strain sensor is a device that converts the change of the measured physical quantity into the change of the resistance value, and finally realizes the measurement of the change of the measured physical quantity through the corresponding measurement circuit. It is widely used in the measurement of pressure, temperature, acceleration, displacement and other signal changes. . A bridge measuring circuit is commonly used in resistance strain sensors. The bridge measurement circuit has four resistors, one diagonal of the bridge is connected to the working voltage E, and the other diagonal is the output voltage Udb. Its characteristics are: when the resistance of the four bridge arms re...

Claims

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Application Information

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IPC IPC(8): G01D5/16
Inventor 平红光贾灵
Owner ZHEJIANG XIANXIN SCI & TECH CO LTD
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