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Wheatstone bridge and multi-dimensional force sensor

A technology of multi-dimensional force sensor and energized bridge, which is applied in the direction of instruments, measuring force, measuring devices, etc., and can solve the problem that the differential output signal has a large influence

Active Publication Date: 2022-02-18
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a Wheatstone bridge and a multi-dimensional force sensor to solve the technical problem that the temperature difference of the strain gauge resistance of the Wheatstone bridge has too much influence on the differential output signal

Method used

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  • Wheatstone bridge and multi-dimensional force sensor
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  • Wheatstone bridge and multi-dimensional force sensor

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Embodiment Construction

[0030] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0031] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating the description of the present application and has no specific meaning by itself. Therefore, "module" and "component" may be mixedly used.

[0032] In related technologies, in order to reduce the impact...

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Abstract

The invention relates to a Wheatstone bridge and a multi-dimensional force sensor. The Wheatstone bridge comprises four bridge arms, each bridge arm comprises a plurality of resistors, the number of the plurality of resistors in each bridge arm is the same, the reference resistance values of the plurality of resistors are the same, the plurality of resistors in each bridge arm adopt a preset series-parallel structure, and in the preset series-parallel structure, the equivalent resistance value of the plurality of resistors is equal to the resistance value of a single resistor. The plurality of resistors are used for balancing the temperature difference of single resistors. A single-resistor bridge arm is replaced by a mode that a plurality of resistors form a bridge arm according to a preset series-parallel structure, and on the basis of not changing the original output characteristics of the circuit, a plurality of resistors with the same or similar temperature characteristics are used for hedging, so that the individual temperature difference is balanced. Therefore, the influence of the resistance value difference of the bridge arm resistor caused by the temperature change on the differential output signal of the Wheatstone bridge is reduced, and the technical problem that the resistance value and temperature difference of the strain gauge of the Wheatstone bridge greatly influences the differential output signal is solved.

Description

technical field [0001] The present application relates to the technical field of multidimensional force sensors, in particular to a Wheatstone bridge and a multidimensional force sensor. Background technique [0002] Due to its special combination of delicate structures and the decoupling of software algorithms, the multi-dimensional force sensor can sense the force and moment in all directions in the space. The comprehensive advantages have become more choices for the design of multi-dimensional force sensors, and are widely used in assembly robots, sorting robots and collaborative robots. However, in high-temperature working environments such as welding and grinding, robots using multi-dimensional force sensors will be affected by high temperature and greatly affect the accuracy and performance of multi-dimensional force sensors, resulting in unstable output signals of the detection part, and even robot failure. The weak asynchronous resistance caused by the temperature d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
CPCG01L1/2262
Inventor 王宇航周丹李宁梁国昌
Owner GREE ELECTRIC APPLIANCES INC
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