Two-line flow detection electronic device

Abstract

The invention aims to provide a flow detection electronic device combining a power supply line and a communication line. According to the device, software is not used, but hardware logic controlled integrated circuit chips are used as core control components. The flow detection electronic device comprises a power supply, a clock circuit, a power-on reset circuit, an input filter protection circuit, a stand-by battery, a diode, a power filter electrolytic capacitor, an input resistor, an input interface, two reed pipes, a flow detection special integrated circuit, a reed pipe filter circuit, a gate control circuit, a line detection circuit, a battery detection circuit and a communication receiving and transmitting circuit, wherein the clock circuit, the power-on rest circuit, the input filter protection circuit, the reed pipe filter circuit, the gate control circuit, a line detection circuit, the battery detection circuit and the communication receiving and transmitting circuit are connected with the flow detection special integrated circuit respectively; the reed pipe filter circuit is also connected with the two reed pipes; the battery detection circuit is also connected with the power supply; and the communication receiving and transmitting circuit is also connected with an input end.

Description

technical field [0001] The invention relates to an electronic device for detecting liquid or gas flow, and in particular provides a two-wire flow detection electronic device using a dedicated chip. Background technique [0002] With the rapid development of electronic information technology, many traditional flow detection instruments have realized the informatization and intelligence of the instrument by adding electronic devices. For example, for water meters used in thousands of households, adding a magnet to the needle and installing two reed switches near the needle can extract the water flow information. On this basis, adding flow detection electronic devices can make various An intelligent water meter. Such as card type water meter, radio measurement and control water meter, wired measurement and control water meter, etc. At present, the core components of this type of water meter electronic devices are almost all single-chip computer chips, which realize the collec...

AI Technical Summary

Problems solved by technology

Due to the failure of software operation, although watchdog circuits are configured in most single-chip microcomputers, the failure of software programs to run away cannot be completely eradicated.

Images