High-sensitivity piezoresistive single-axis force sensor design method based on topological optimization

A technology of force sensor and topology optimization, which is applied in the field of sensor automation design, can solve the problems of difficult sensor configuration, high R&D cost, and speed up sensor R&D.

Active Publication Date: 2020-05-01
ZHEJIANG UNIV +1
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Problems solved by technology

[0004] Aiming at the problems that the traditional sensor design is mostly based on experience and requires a lot of trial and error, the research and development cost is relatively high, and the sensor configuration given by the existing automatic design method is not easy to process and produce, the present invention proposes a high-sensitivity piezoresistive sensor based on topology optimization Uniaxial force sensor design method, which can design a machinable sensor configuration, speed up sensor development and save development costs

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  • High-sensitivity piezoresistive single-axis force sensor design method based on topological optimization
  • High-sensitivity piezoresistive single-axis force sensor design method based on topological optimization
  • High-sensitivity piezoresistive single-axis force sensor design method based on topological optimization

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Embodiment Construction

[0062] The effects of the present invention will be further described below in conjunction with specific examples.

[0063] The method of the invention is used to carry out secondary design on a certain type of "bone type" uniaxial pressure sensor. The geometric information and finite element model of this type of sensor can be found in Figure 4 , the position of the patch is located on the upper and lower surfaces at x=40, and each piece of strain gauge is attached to form a half bridge. It can be obtained by calculation that the strain output value of this model is: ε g 2 = 6.76e-6. As a comparative example, here we only consider the lower limit of the unilateral strain constraint ( ε ) 2 , set the value to 7.0e-6. Here, four two-dimensional ellipses and one equal-section two-dimensional rod are selected to represent the topological description function of the "bone type". Only the geometric control parameters of the lower left ellipse and the height of the constant-...

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Abstract

The invention discloses a high-sensitivity piezoresistive single-axis force sensor design method based on topological optimization. According to the method, the minimum structure external force work is taken as an optimization target; three constraint conditions of a binding force balance equation, a volume constraint and a sensitivity constraint are provided; the sensor configuration is determined by a series of design variables; optimization problem, the invention relates to a topological optimization method based on a mobile component (hole). Size optimization and topological optimization design of the sensor are unified by utilizing a topological description function, only proper relevance needs to be added to some design variables (geometric control parameters), then geometric information in a design domain is mapped to a finite element model to obtain an optimized column finite element discrete format, and the optimized column finite element discrete format is solved by adoptingan optimization solver. According to the method, the research and development cost of the sensor is expected to be reduced, the design efficiency of the sensor is improved, and the designed sensor configuration is machinable.

Description

technical field [0001] The present invention relates to the automatic design of sensors, in particular to a design method for high-sensitivity piezoresistive uniaxial force sensors based on topology optimization, that is, using the topology optimization method of moving components (holes) to automatically design piezoresistive uniaxial force sensors that meet the sensitivity requirements force sensor. Background technique [0002] Force sensors are widely used in experiments and engineering tests to accurately obtain the force on the test piece. With the continuous development of science and technology, the industry has increasingly high requirements for the performance of force sensors, among which sensitivity is an important index for evaluating sensors. Traditional design methods are generally based on engineering experience, and on the basis of engineering experience, a lot of time and money need to be invested in testing and modification to achieve the desired goal. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/17
Inventor 胡雪岩陈伟球鲍荣浩郭旭张维声
Owner ZHEJIANG UNIV
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