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Force sensor using integral force biasing for improved linearity

A force sensor and force applicator technology, applied in the field of force sensors, can solve problems such as collision with external objects, achieve the effects of improved accuracy, improved performance consistency, and simplified calibration

Active Publication Date: 2015-05-20
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if a component of the robot is moved, it may collide with an external object

Method used

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  • Force sensor using integral force biasing for improved linearity
  • Force sensor using integral force biasing for improved linearity
  • Force sensor using integral force biasing for improved linearity

Examples

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Embodiment Construction

[0023] To aid understanding, this document is organized as follows. First, refer to Figure 1A - 1C, An exemplary application of a force sensor used in a medical environment is briefly described to introduce some advantages of a force biased force sensor. Second, refer to Figure 2-3 , an exemplary preloaded force sensor having a force transmission device including a colloid transmission member will be described. Next, refer to Figure 4-5 , the discussion turns to an exemplary force bias using a mechanical force transfer member. Finally, refer to Figure 6-7 , an exemplary performance improvement will be discussed using a response graph and an error graph showing non-preloaded measurements. The improvement in performance due to preloading the sensors used to obtain these measurements will be described from these figures.

[0024] Figures 1A-1B An exemplary scenario is shown in which a force sensor is used to monitor the flow of drug into a patient. exist Figure 1A I...

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PUM

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Abstract

Apparatus and associated methods relate to a preloaded force sensor, the preloaded force being greater than a force threshold separating a non-linear response region of sensor operation from a substantially linear response region of sensor operation. In an illustrative embodiment, the total applied force includes the preloaded force and an externally-applied force, the preloaded force being predetermined such that electrical signal response is substantially linear for positive externally-applied forces which when added to the preload force do not exceed the maximum force. In some embodiments, the externally-applied force may be transferred to a force-sensing die via a force-transfer member. In an exemplary embodiment, a spring having a predetermined spring coefficient may apply the predetermined preload force to the force-transfer member. In an exemplary embodiment, externally-applied positive forces may be simply calibrated using gain and offset corrections.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L9/02G01L19/06
CPCG01L1/2275G01L1/18G01L9/0052G01L19/147
Inventor R. A. 瓦德I. 本特利J. D. 佩奇L. F. 里克斯
Owner HONEYWELL INT INC
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