Self-encapsulating passive wireless pressure sensor based on flexible substrate

A pressure sensor, passive wireless technology, applied in the field of sensors, can solve the problems of limiting the overall characteristics of the device, difficult to obtain the quality factor, increasing the size of the device, etc., to achieve the effect of simple structure, low packaging cost, and protection of the internal structure
CN103148977BInactive Publication Date: 2016-01-20SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2016-01-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention disclosed a passive wireless pressure sensor with a self -packaged function based on flexible substrates, including the upper flexible substrate, upper metal layer, medium flexible substrate, lower metal layer, and lower flexibility of the upper and fixed connection from top to bottom.The substrate, the medium flexible substrate is equipped with electrical pores and cavity; the upper metal layer includes the plane inductory coil and the capacitance on the middle of the capacitance coil, and the inner connector of the flat inductance coil is connected to the capacitor plate; belowThe metal layer includes a capacitor lower plate with the same size and relative position as the capacitor plate, and the connected line connected to the capacitor plate.The interconnection of the medium column and the lower metal layer, the cavity of the medium flexible substrate is located between the polar plate and the lower part of the capacitance on the capacitor.The pressure sensor has the excellent performance of self -packaging, non -contact, high sensitivity, and high quality factor.
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Description

technical field

[0001] The invention belongs to the technical field of sensors, and in particular relates to a passive wireless pressure sensor based on a flexible substrate and having a self-packaging function. Background technique

[0002] Pressure sensors are widely used in many occasions. In some special applications, such as: inside the human body, food packaging and other sealed environments, pressure sensors are required to have wireless telemetry capabilities. There are currently two types of wireless telemetry pressure sensors: active telemetry and passive telemetry. Active telemetry means that the sensing system has a power source. This type of telemetry can transmit sensor signals in both directions over long distances, but the system is complex, large in size, and the battery needs to be replaced. Passive telemetry means that there is no power source in the sensing system, and signals are acquired by using inductive coupling or radio frequency (RF) reflection mo...

Claims

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