An intrinsically safe passive radio frequency circuit

Abstract

The invention discloses an intrinsic safety type passive radio frequency circuit which can meet intrinsic safety specified standard requirements in hazardous environments with explosion and the like. The intrinsic safety type passive radio frequency circuit comprises a radio frequency antenna module, an energy storage module, an energy monitoring module and an energy control module, wherein the radio frequency antenna module comprises a receiving and sending circuit and an energy conversion circuit; the receiving and sending circuit also receives radio frequency energy transmitted from a radio frequency main station while transmitting and receiving radio frequency signals, and the energy conversion circuit converts the radio frequency energy into direct-current electric energy; the energy storage module comprises an energy storage circuit for storing the direct-current electric energy; the energy monitoring module comprises an electric quantity monitoring circuit and an electric quantity variation control circuit; when the electric quantity measured by the electric quantity monitoring circuit exceeds a set value, the electric quantity variation control circuit transfers redundant electric quantity to the energy storage circuit of the energy storage module; and the energy control module comprises a voltage sudden change suppression circuit and a current sudden change suppression circuit. The radio frequency circuit can be widely applied to industries of Internet of things and the like.

Description

technical field [0001] The invention relates to an intrinsically safe passive radio frequency circuit used in the Internet of Things industry that can meet the requirements of intrinsically safe standards in hazardous environments such as explosions. Background technique [0002] At present, the radio frequency (RF) circuit used for the Internet of Things in a dangerous or explosive environment usually adopts the RF circuit of the Internet of Things in an ordinary environment. The current change of this circuit has unexpected mutations, which cannot meet the intrinsically safe environment electrically. requirements, and it is easy to cause current damage to the radio frequency antenna, which greatly reduces the reliability of the radio frequency circuit in the Internet of Things industry. The control within the effective range cannot be performed, which increases power consumption, reduces battery life, and increases maintenance costs. Contents of the invention [0003] T...

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Problems solved by technology

[0002] At present, the radio frequency (RF) circuit used for the Internet of Things in a dangerous or explosive environment usually adopts the RF circuit of the Internet of Things in an ordinary environment. The current change of this circuit has unexpected mutations, which cannot meet the intrinsically safe environment electrically. requirements, and it is easy to cause current damage to the radio frequency antenna, which greatly reduces the reliability of the radio frequency circuit in the Internet of Things industry. Unable to control within the effective range, increasing power consumption, reducing battery life, and increasing maintenance costs

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