Wireless passive measuring device

Abstract

The invention provides a wireless passive measuring device. A first microcontroller controls the input of an electric source through a double-voltage power driving module; the electric source supplies electricity to a wireless passive measuring circuit sequentially through the double-voltage power driving module and a primary coil; the first microcontroller realizes the communication with the wireless passive measuring circuit through a first wireless module; the electric energy is coupled to a rectification and charging management module by a secondary coil and stored in a farad capacitor; the electricity is supplied to a second microcontroller and a sensor module via a voltage stabilizing circuit; the second microcontroller detects charging-discharging voltage of the farad capacitor in real time through a voltage monitoring module, and the farad capacitor is charged through an external control circuit; and the measured physical quantity is obtained by the sensor module and transmitted to the external control circuit through a second wireless module under the control of the second microcontroller, thereby realizing wireless passive measurement of the physical quantity. The wireless passive measuring device is applied to places where energy transmission and signal reading cannot be conducted by using conducting wires; and multiple simulative or digital physical quantities can be measured.

Description

technical field [0001] The invention relates to the wireless passive field, in particular to a wireless passive measuring device. Background technique [0002] The development of modern measurement technology has made it possible to measure many physical quantities intuitively, such as pressure, temperature, humidity and flow. But a big limitation is that it needs to supply energy and read data through wires, which is very unfavorable for the application of measuring some physical quantities inside containers, animals or certain parts inside the human body. [0003] The Chinese utility model patent "A Wireless Passive Measurement Circuit" (public number: CN201629035U, publication date: November 10, 2010) provides a wireless passive measurement circuit, which realizes the measurement of physical quantities through controllable capacitance or inductance. However, this measurement method can measure fewer physical quantities, only one physical quantity can be measured at a tim...

AI Technical Summary

Problems solved by technology

But a big limitation is that it needs to supply energy and read data through wires, which is very unfavorable for the application of measuring some physical quantities inside containers, animals or certain parts inside the human body.

[0003] The Chinese utility model patent "A Wireless Passive Measurement Circuit" (public number: CN201629035U, publication date: November 10, 2010) provides a wireless passive measurement circuit, which realizes the measurement of physical quantities through controllable capacitance or inductance. measurement, but this measurement meth

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