Current regulative diode circuit of meter bus slave interface

A constant-current diode and constant-current circuit technology, applied in bus network, electrical program control, data exchange through path configuration, etc., can solve the problems of serious temperature drift, difficult debugging and production, high cost, etc., and achieve stability and consistency High, indirect and rapid commissioning and production, and the effect of temperature drift is small

Active Publication Date: 2014-04-16
深圳市源啓智能科技有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the m-bus slave interface circuit generally uses the TSS721 interface chip of American TI Company, which is not only expensive, but also inconvenient to purchase
[0004] As another example, the FG722 chip of Xi'an Shenya Electronics Co., Ltd. is a substitute chip for the TSS721 interface chip. It is a meter bus dedicated terminal transceiver chip designed accord

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Current regulative diode circuit of meter bus slave interface
  • Current regulative diode circuit of meter bus slave interface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0022] Considering that the m-bus specification stipulates that the slave uses a constant current to send data, the present invention uses a constant current diode as a constant current source, and sends data through a triode or a field effect tube switch. Such as figure 2 As shown, one embodiment of the present invention is a constant current diode circuit of a meter bus slave device interface, which includes a bridge rectifier circuit, a constant current circuit, a data receiving circuit, and a data sending circuit; the bridge rectifier circuit The two input terminals are used to connect the two transmission lines of the meter bus respectively; that is, the first input terminal 1 and the second input terminal 3 of the bridge rectifier circuit are used to connect the two transmission lines of the meter bus respectively; the bridge rectifier The first output...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a current regulative diode circuit of a meter bus slave interface. The current regulative diode circuit of the meter bus slave interface comprises a bridge rectifier circuit, a constant current circuit, a data receiving circuit and a data sending circuit. The two input ends of the bridge rectifier circuit are used for being connected with two transmission lines of a meter bus respectively. The first output end of the bridge rectifier circuit is respectively connected with the input end of the constant current circuit and the data receiving circuit. The constant current circuit comprises at least one current regulative diode. The output end of the constant current circuit is connected to the second output end of the bridge rectifier circuit through a switch circuit. The data receiving circuit is provided with a data receiving port and is used for receiving data. The data sending circuit is provided with a data sending port and is used for sending data. The control end of the switch circuit is connected with the data sending circuit and is used for controlling switching-on and switching-off of the switch circuit according to the data sent by the data sending circuit.

Description

technical field [0001] The invention relates to a slave device interface circuit of an instrument bus, in particular to a constant current diode circuit for an instrument bus slave device interface. Background technique [0002] Meter Bus (M-bus for short) is a new type of bus structure, which is characterized in that only two non-polar transmission lines are used as power supply lines and transmission lines for serial data transmission at the same time, and each terminal device is confirmed by a different address code It can be connected to the M-bus in parallel. Such as figure 1 As shown, the master device actively starts a communication process, that is, sends instructions and data, and the slave device monitors the bus as a slave device, and is ready to respond to bus commands at any time. [0003] The M-bus chip is suitable for all kinds of consumer instruments, such as water meters, electricity meters, gas meters and smoke alarm devices, etc., and can be widely used ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G05B19/418H04L12/40
CPCY02P90/02
Inventor 苏奇张卫红张系强刘清波李怡凡
Owner 深圳市源啓智能科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap