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Sensor and method for preparing same

A sensor, piezoresistive sensor technology, applied in the field of detection, can solve the problems of complex positive pressure signal processing algorithm, difficult to install on the surface of prosthesis, low sensitivity and resolution of sliding signal, etc., to achieve the effect of improving accuracy

Pending Publication Date: 2019-03-01
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the tactile sensor is not easy to install on the surface of the prosthesis due to the use of inflexible materials; when a single tactile sensor simultaneously detects positive pressure signals and sliding signals in tactile signals, There is a phenomenon that the detection effects of the two cannot be achieved at the same time. For example, for a piezoresistive sensor that meets the actual grip requirement range, it can realize stable and intuitive detection of positive pressure signals, but there is a problem that the detection of sliding signals is not sensitive enough and the resolution is insufficient. Low problem; for piezoelectric sensors, it has high sensitivity to sliding signal detection, but there is a problem that the detection of positive pressure signal processing algorithm is complex and the delay can not meet the real-time detection of positive pressure signal.
The use of the above-mentioned tactile sensors will lead to low accuracy in detecting tactile signals, which in turn affects the application effect of prosthetics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 1 This is a schematic structural diagram of a sensor provided in the first embodiment of the present invention. This embodiment can be applied to the situation of detecting tactile signals, such as figure 1 As shown, the sensor may specifically include: a piezoelectric electret sensor 11, a piezoresistive sensor 12, a protective member 13, and a buffer layer 14. The structure and function of the sensor are described below.

[0034] The buffer layer 14 is arranged between the piezoelectric electret sensor 11 and the piezoresistive sensor 12, and the piezoelectric electret sensor 11 and the piezoresistive sensor 12 are embedded in the protective member 13.

[0035] In the embodiment of the present invention, a tactile sensor is added to the prosthesis to realize real-time feedback of the motion state between the prosthesis and the object, and as a real-time control signal of the prosthetic control system to realize the closed-loop control of the prosthetic grip with a hig...

Embodiment 2

[0054] image 3 This is a flowchart of a method for manufacturing a sensor provided in the second embodiment of the present invention. This embodiment can be applied to the case of detecting tactile signals. Such as image 3 As shown, the method specifically includes the following steps:

[0055] Step 110: Obtain a piezoelectric electret sensor and a piezoresistive sensor, and the sensitive areas of the piezoelectric electret sensor and the piezoresistive sensor are matched.

[0056] Step 120: Fill a buffer layer between the piezoelectric electret sensor and the piezoresistive sensor.

[0057] Step 130: Embed the piezoelectric electret sensor and the piezoresistive sensor filled with the buffer layer in the protective member to obtain a composite sensor.

[0058] In the embodiment of the present invention, a piezoelectric electret sensor and a piezoresistive sensor are acquired, where the piezoresistive sensor needs to meet preset conditions, and the preset conditions may specifically...

Embodiment 3

[0069] Figure 4 This is a flowchart of a method for manufacturing a sensor provided in the third embodiment of the present invention. This embodiment can be applied to the case of detecting tactile signals. Such as Figure 4 As shown, the method specifically includes the following steps:

[0070] Step 210: Select a piezoelectric electret and a piezoresistive sensor that meets preset conditions. The preset conditions include size, size, and range.

[0071] Step 220: Shear the piezoelectric electret sensor to match the sensitive area of ​​the piezoelectric electret sensor and the piezoresistive sensor.

[0072] Step 230: Fill a buffer layer between the piezoelectric electret sensor and the piezoresistive sensor.

[0073] Step 240: Stick the first protective layer on the outer surface of the piezoelectric electret sensor, and stick the second protective layer on the outer surface of the piezoresistive sensor.

[0074] Step 250, encapsulating the piezoelectric electret sensor, the piezore...

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Abstract

The invention discloses a sensor and a method for preparing the same. The sensor comprises a piezoelectric electret sensor, a piezoresistive sensor, a protection member and a buffer layer, wherein thebuffer layer is disposed between the piezoelectric electret sensor and the piezoresistive sensor; and the piezoelectric electret sensor, the piezoresistive sensor and the buffer layer are embedded inthe protection member. Embodiments of the present invention improve the accuracy of a tactile sensor for detecting a tactile signal.

Description

Technical field [0001] The embodiment of the present invention relates to detection technology, in particular to a sensor and a method for preparing the sensor. Background technique [0002] Among the various types of disabled people in the country, the largest population is physically disabled, who need to wear artificial limbs (ie prostheses) to assist them in daily life and work. In the prior art, a tactile sensor is usually added to the prosthesis, which can feedback the motion state between the prosthesis and the object in real time, and serve as the real-time control signal of the prosthetic control system to achieve closed-loop control of the prosthetic grip with a high success rate. The tactile sensor includes piezoresistance. Sensors, piezoelectric sensors and pressure-capacitance sensors, etc. [0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: because the tactile sensor uses infl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/16G01L1/18G01D5/12
CPCG01D5/12G01L1/16G01L1/18
Inventor 于雷田岚方鹏李光林
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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