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Series redundant capacitive sensing device

A technology of capacitance detection and capacitance, which is applied in the direction of measuring devices, capacitance measurement, and electric devices, etc., can solve the problems of expensive solutions, electrodes sensitive to mutual interference, bulky, etc., and achieve the effect of reducing quantity, high sensitivity, and small size

Pending Publication Date: 2021-01-12
法格尔传感器公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the solution described in this document is expensive and bulky as it requires the use of a large number of electrodes
Additionally, the solutions proposed in this document are sensitive to mutual interference between electrode pairs and require cells for isolating electrode pairs or using electrode pairs sequentially

Method used

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  • Series redundant capacitive sensing device
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  • Series redundant capacitive sensing device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0185] According to the first embodiment, the first, second and third calculation modules 124 to 128 can be configured to perform the following operations:

[0186] - the third calculation module 128 calculates the distance value between the object and the detection electrode 102 based on the signal provided by the measurement electronics 108 and provides this distance value to the calculation modules 124 and 126; and

[0187] - Each calculation module 124 and 126 respectively compares this distance with a threshold distance value corresponding to a safety distance or contact between the detection electrode 102 and an object and provides a signal related to the crossing of said safety distance or said contact. This signal can be an analog signal, a numerical signal, or a closing or opening signal of a relay.

[0188] According to the second embodiment, the first, second and third calculation modules 124 to 128 can be configured to perform the following operations:

[0189] - ...

no. 3 example

[0191] According to the third embodiment, the first, second and third computing modules 124 to 128 can be configured to perform the following operations:

[0192] - the third calculation module 128 calculates the capacitance value between the object and the detection electrode 102 based on the signal provided by the measurement electronics 108 and provides this capacitance value to the calculation modules 124 and 126; and

[0193] - each computing module 124, 126 respectively:

[0194] Calculate the distance value based on the capacitance value provided by the third calculation module 128; and

[0195] Comparing the distance value with a threshold distance value corresponding to the safe distance or contact between the detection electrode 102 and the object, and

[0196] • Providing a signal related to the crossing of said safety distance or said contact. This signal can be an analog signal, a numerical signal, or the closing or opening of a relay.

[0197] According to ano...

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Abstract

The present invention concerns a capacitive sensing device (100) for sensing an object relative to a sensing surface, comprising: at least one capacitive sensing electrode (102), and an electronic detection unit (106) comprising an electronic measurement unit (108), for: polarising said at least one sensing electrode (102) at an alternating excitation potential (VG) different to a ground potential(118), and measuring a measurement signal relative to an electrode / object capacitance; characterised in that the electronic detection unit (106) further comprises, for said electronic measurement unit, at least two separate calculation modules (124, 126), functioning in parallel, and providing two separate detection signals for a same measurement signal originating from the electronic measurementunit (108).

Description

technical field [0001] The invention relates to a device for redundant capacitive detection of objects. The invention also relates to a detection layer equipped with such a detection device and a device equipped with such a device or such a layer. [0002] Without limitation, the field of the invention is interfaces for capacitive detection of objects, to detect objects in the environment or in contact with a detection surface. Background technique [0003] A first capacitive detection technique based on the mutual capacitance formed between two measuring electrodes is known. A second capacitive detection technique based on the capacitance formed between the object to be detected and the measuring electrodes is also known. The present invention relates to the second capacitance detection technology. [0004] In general, capacitive detection devices can be used in areas with increased or severe risks. This is the case, for example, in areas where human operators work with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/03G01L1/14G01R27/26
CPCG05B9/03G01B7/023G01D3/08G01D5/24G01R27/2605H03K17/955H03K2217/960705H03K2217/960745
Inventor 克里斯蒂安·尼尔迪迪埃·罗齐埃
Owner 法格尔传感器公司