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Plantar pressure sensor correcting temperature influence, and corresponding correcting method

A technology for correcting temperature and plantar pressure, which is applied in the direction of sensors, measurement of properties and forces using piezoresistive materials, instruments, etc., and can solve problems such as large influence on measured values, low accuracy, and large temperature influence

Pending Publication Date: 2019-09-06
北京中硕众联智能电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most pressure sensors use piezoelectric and piezoresistive materials, and their measured values ​​are greatly affected by temperature changes.
Most of the traditional in-shoe pressure sensors can only measure pressure and cannot correct changes in foot temperature, resulting in the defects of being greatly affected by temperature and low accuracy

Method used

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  • Plantar pressure sensor correcting temperature influence, and corresponding correcting method
  • Plantar pressure sensor correcting temperature influence, and corresponding correcting method
  • Plantar pressure sensor correcting temperature influence, and corresponding correcting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1 A plantar pressure insole that corrects the influence of temperature

[0082] This embodiment relates to a plantar pressure insole that corrects the influence of temperature, including a signal acquisition part and a circuit part.

[0083] like figure 1 and figure 2 As shown, the signal acquisition part includes the first device protection layer 1, the first electrode layer 2, the piezoelectric film layer 3, the ground electrode layer 4 and the second device protection layer 5 arranged in sequence from top to bottom; the first electrode layer 2 , the piezoelectric film layer 3 and the ground electrode layer 4 form a pressure detection unit, and the first electrode layer 2 serves as a temperature detection unit; the first electrode layer 2 includes N (N≥1) small electrodes distributed according to the shape of the sole of the foot.

[0084] The circuit part includes a front-end circuit and a back-end circuit; the front-end circuit includes a controller an...

Embodiment 2

[0087] Embodiment 2 A method of correcting plantar pressure affected by temperature

[0088] This embodiment adopts embodiment 1 to realize, when adopting figure 2 When the back-end circuit is shown, the method is method one, which includes the following steps in sequence:

[0089] 1. Output a DC current signal and an AC current signal to the multiplexer through the controller, and the multiplexer outputs the received DC current signal and AC current signal to the first electrode layer 2 after modulation;

[0090] When the pressure on the surface of the sensor corresponding to the Nth (N≥1) small electrode of the first electrode layer 2 changes, the surface of the piezoelectric film layer 3 generates charges and further forms an AC analog current signal; when the first electrode layer 2 When the temperature of the sensor surface corresponding to the Nth (N≥1) small electrode changes, the resistivity of the Nth (N≥1) small electrode changes, causing the resistance to change a...

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Abstract

The invention discloses a plantar pressure sensor correcting temperature influence. The plantar pressure sensor correcting temperature influence comprises a signal acquisition part and a circuit part;the signal acquisition part sequentially comprises a first device protection layer, a first electrode layer, a piezoelectric film layer, a ground electrode layer and a second device protection layerfrom top to bottom; the first electrode layer, the piezoelectric film layer and the ground electrode layer form a pressure detection unit; the first electrode layer is used as a temperature detectionunit; the circuit part comprises a front-end circuit and a rear-end circuit; the front-end circuit comprises a controller; the control signal output end of the controller is connected with the signalinput end of the first electrode layer; and the rear-end circuit is a first rear-end circuit or a second rear-end circuit. The invention further discloses a method for correcting temperature influenced plantar pressure. According to the plantar pressure sensor correcting temperature influence, and the corresponding correcting method in the invention, the pressure and the temperature can be measured at the same time; therefore, change of a piezoelectric constant due to temperature change is corrected; therefore, the accuracy of the sensor is greatly improved; disadvantages of the existing product are made up; and the plantar pressure sensor correcting temperature influence, and the corresponding correcting method are applied to the technical field of medical equipment.

Description

technical field [0001] The invention belongs to the technical field of medical equipment and is used for detecting and correcting the pressure of the sole, in particular to a sole pressure sensor for correcting the influence of temperature and a corresponding correction method. Background technique [0002] With the improvement of living standards, human health has become an important issue of concern. According to the biological holographic theory, the foot is related to the internal organs and various organs of the human body, and has its corresponding reflection area. It can be seen that the foot has a close relationship with human health and longevity. [0003] The distribution of human plantar pressure can reflect the function of lower limbs and changes in body posture. By testing and analyzing the pressure parameters of each point on the sole of the foot, the physiological and pathological parameters of the human body under different exercise states can be obtained, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18G01L1/26A61B5/103
CPCG01L1/18G01L1/26A61B5/1038
Inventor 高硕代晏宁
Owner 北京中硕众联智能电子科技有限公司
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