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Force transducer and weighting device with same

A force sensor and weighing device technology, applied in measuring devices, measuring force, weighing equipment using elastically deformable parts, etc., can solve the problems of bulkiness, thick electronic scales, complex processing and assembly, etc.

Active Publication Date: 2014-02-26
ZHONGSHAN TRANSTEK ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing and assembly of traditional capacitive load cells are complicated, and additional metal covers are required for electromagnetic shielding, which makes the cost relatively high
The thickness of the sensor itself plus the shield makes the scale thick and bulky
In addition, the space between the two electrodes is connected to the ambient air, which is easily affected by the change of ambient air humidity and the measurement accuracy

Method used

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  • Force transducer and weighting device with same
  • Force transducer and weighting device with same
  • Force transducer and weighting device with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] like figure 2 Shown is a load cell according to an embodiment, including: an elastic body 100 , a first electrode 102 , and a second electrode 104 . Wherein the elastic body 100 further comprises a first force-receiving part 120, a second force-receiving part 122 and a strain part 124, wherein the two sides of the strain part 124 are respectively connected with the first force-receiving part 120 and the second force-receiving part 122, and the second The first force-receiving part 120 and the second force-receiving part 122 are used to bear action force and reaction force, and the strain part 124 is deformed correspondingly under the force.

[0034] The first electrode 102 is relatively fixed to the first force-receiving part 120 of the elastic body 100, for example, directly attached to the first force-receiving part 120; the second electrode 104 is arranged opposite to the first electrode 102, and there is a gap in the middle to form a capacitor . The second electr...

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PUM

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Abstract

The invention discloses a force transducer and a weighting device with the same, wherein the transducer comprises an elastomer, a first electrode and a second electrode, wherein the elastomer is composed of a first stressed part, a second stressed part and a stress part; the first electrode is relatively fixed with the first stressed part of the elastomer; and the second electrode is relatively fixed with the second stressed part, and is arranged relative to the first electrode to form a capacitor. The force transducer in the invention has simple structure, low cost and stable performance. In addition, the influence of air humidity and component variation on the measurement precision of a capacitive force transducer can be eliminated in the invention.

Description

technical field [0001] The invention relates to a capacitive force measuring sensor and a weighing device including the sensor. Background technique [0002] The load cell is a force-electric conversion device, which is widely used in industrial and agricultural production and people's daily life for weighing and measuring force. [0003] To this end, people have invented various load cells. Most of the existing force sensors are measured by resistive strain gauges. [0004] The power consumption of the resistive strain gauge sensor and the measurement circuit is relatively large. If the battery is used for power supply, the battery needs to be replaced frequently. Moreover, the initial zero point value of the resistance strain gauge changes with temperature, which will cause errors in the case of uninterrupted measurement. [0005] Capacitive load cells consume very little power and can even be powered by solar cells. like figure 1 As shown, it is a traditional capacit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/14G01G3/12
Inventor 潘伟朝
Owner ZHONGSHAN TRANSTEK ELECTRONICS