Force Sensors Using Integral Force Biasing for Improved Linearity

A force sensor and sensor technology, applied in the field of force sensors with a linear correction method, can solve problems such as collision with external objects, and achieve the effects of improved accuracy, improved medical treatment, and improved measurement repeatability
CN104634500BActive Publication Date: 2019-12-03HONEYWELL INT INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HONEYWELL INT INC
Publication Date
2019-12-03

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Abstract

The present invention relates to force sensors that use integral force biasing in order to improve linearity. The apparatus and associated method involve preloading a force sensor with a preload force greater than a force threshold that distinguishes a non-linear response region of sensor operation from a generally linear response of sensor operation. In the illustrative embodiment, the total applied force includes a preload force and an applied force, the preload force being predetermined such that for a positive applied force, the electrical signal response is substantially linear, the applied force being between and the preload force The maximum force will not be exceeded when added. In some embodiments, the externally applied force may be transferred to the force sensing chip via the force transfer member. In an exemplary embodiment, a spring having a predetermined spring constant may apply a predetermined preload force to the force transmitting member. In an exemplary embodiment, the externally applied normal force can be calibrated simply by using gain and offset corrections.
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Description

[0001] Cross References to Related Applications

[0002] By reference herein, this application incorporates in its entirety the disclosure of the following prior-filed applications, which have related subject matter and common inventors:

[0003] 13 / 429,280 Force Sensor March 23, 2012

[0004] 13 / 628,673 Mechanically Coupled Force Sensor on Flexible Platform Assembly Structure September 27, 2012. technical field

[0005] Various embodiments relate generally to force sensors, and more particularly to force sensors with linear correction methods. Background technique

[0006] Force sensors are widely used in many fields in today's high-tech world. Force sensors are used in advanced robots to provide electrical signals in response to force. Such robots may use force sensors to provide feedback to the processor based on the forces applied by the moving machinery under the control of the robot. But force sensors can also be used to provide feedback to the processor based on f...

Claims

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