Microwave radar moisture sensor

Abstract

The invention relates to a microwave radar moisture sensor, in particular to a contact / non-contact medium continuous or point sensing type microwave radar moisture sensor. The microwave radar moisture sensor comprises a probe, a signal channel, a signal processor (DSP), a TPS interface, a microprocessor (MCU), an I2C interface and a driving interface, wherein the output port of the probe is provided with an antenna, and the antenna can be provided with a holder and a filter scraper; the signal processor (DSP) and the microprocessor (MCU) are managed by respective software respectively; a pre-detected signal is connected with the driving interface through the probe, the signal channel, the signal processor, the TPS interface and the microprocessor (MCU); in addition, the probe, a polarization separator and a signal transceiver form a loop; and the antenna is arranged on one side or two sides of a detection medium. Because the microwave radar moisture sensor belongs to a multi-sensor system, correlated variables of the sensor are provided with enough interfaces, and other probes for temperature and electric conductivity can be connected with the signal processor through the I2C so as to finish moisture parameter correction.

Description

Technical field: [0001] The invention relates to a microwave radar moisture sensor, in particular to a contact / non-contact continuous or spot measurement microwave radar moisture sensor. Background technique: [0002] A kind of petroleum water holdup logging instrument described in CN2648459 utility model patent of the existing technical bulletin is composed of water holdup radar sensing probe, high frequency signal transceiver processor, digital signal processor, microprocessor and wired single core The basic principle of the measurement is to use the instrument to measure the propagation speed and phase shift of the electromagnetic wave, and obtain the dielectric constant, and then use DSP technology and wireless telescopic transmission (WTC) technology, according to the dielectric constant and the contained The theoretical model of the relationship between water volume and the theoretical model of phase shift and water content calculates the water holdup rate and transmit...

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Problems solved by technology

[0003] However, with the promotion of the scope of application, the complex diversity of detection objects and the influence of other parameters (such as temperature, density, gas holdup, pressure, etc.) have caused The promotion and application of this patented product has been greatly restricted, especially in the moisture content of the non-contact lossy medium (moisture content: this patent refers to the general term of the proportion of water in the mixed medium to be measured, which can refer to the construction of volume. The water holding rate or moisture content of the target can also refer to the water content or humidity of the standard in terms of quality. It depends on the requirements of the standard, but it does not conflict with the detection technology. It will be directly quoted later and will not be explained.) It is difficult to popularize in the measurement to practical stage

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