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A multi-frequency capacitive measurement device and a methodof operating the same

A technology of capacitance measurement and voltage measurement, which can be used in measurement devices, material capacitance, measurement of electrical variables, etc., and can solve problems such as promoting traffic safety, wrong ice indication, and increasing traffic accidents.

Inactive Publication Date: 2006-03-22
FONDAZIONE TORINO WIRELESS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of any system that detects the presence or state of a specific substance relies heavily on the reliability of the measurement data, for example, falsely indicating ice as water can even increase the likelihood of traffic accidents instead of promoting traffic safety

Method used

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  • A multi-frequency capacitive measurement device and a methodof operating the same
  • A multi-frequency capacitive measurement device and a methodof operating the same
  • A multi-frequency capacitive measurement device and a methodof operating the same

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Embodiment Construction

[0049] Figure 1a The illustrated capacitance measurement device 100 includes a frequency generator 110 , a sensing device 120 , and an electrode assembly 130 . The electrode assembly 130 may include more than two individual electrodes configured and positioned to determine a specific capacitance between at least two individual electrodes under predetermined conditions of the electrode assembly 130 . That is, the individual electrodes of the assembly 130 include conductive portions of specific capacitive surfaces positioned so as to set a predetermined distance therebetween. It is well known that the effective capacitance of two conductive surfaces located close to each other is determined by their geometry, the size of the effective surface area, the distance between the surface areas and the permittivity of the space enclosing the surface areas. For example, electrode assembly 130 may include at least one pair of plate-like electrodes having a defined geometry and supported ...

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Abstract

A method and a system is provided that includes a multifrequency generator supplying signals of at least three different frequencies to an electrode assembly, the capacitance of which is detected for a plurality of different frequency points. In this way, the capacitance of the electrode assembly, which is influenced by a substance present in the vicinity of the electrode assembly, may be reliably identified. Preferably, the conditions of a road surface may be reliably monitored.

Description

technical field [0001] The present invention relates to measurement systems and methods for determining the change in capacitance of an electrode assembly that may be exposed to specific environmental conditions, such that, for example, the presence of a specific substance causes a change in capacitance due to a change in dielectric constant. Background technique [0002] In many fields, accurate and prompt information of specific environmental conditions is required to initiate appropriate responses to detected environmental conditions. For example, an adequate assessment of the environmental conditions of the road surface can greatly improve traffic safety, as decisions can be made based on this information according to road managers and road conditions. In addition, information about road conditions can be communicated to road users via radio and electronic signals, so that speed-limited driving can be adapted to prevailing road conditions. Specifically, any information ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22G01W1/06
CPCG01N27/22G01D5/2405G01N27/228G01R23/00G01R27/26
Inventor 埃罗斯·帕塞罗马尔科·里卡尔迪塔西洛·B·迈因德尔
Owner FONDAZIONE TORINO WIRELESS