A fire industry bus coding method

A technology of industrial bus and encoding method, which is applied in the direction of code conversion, individual digital conversion, electrical components, etc., can solve the problems of high hardware purchase cost, poor bus load capacity, and reduced power supply and driving ability of back-end equipment, so as to ensure Accuracy, ensuring power supply and drive capability, reducing the effect of requirements
CN106911334BActive Publication Date: 2021-08-10光和电科技(广东)有限公司
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
光和电科技(广东)有限公司
Publication Date
2021-08-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a fire-fighting industrial bus coding method, which includes: (1) a fire alarm controller uses a low-level pulse with a duty ratio of 0.3 or less as the starting point of bit code division to perform coding, and synchronizes the signal; (2) When encoding, the bit "0" is determined by the pulse width between two level falling edges, and the bit "1" is determined by the pulse width between two level rising edges; Give an independent synchronous signal; (3) Repeat step (2) for continuous encoding until the encoding is completed, and then send codes to the smart components through the bus. The invention has a simple process and a simple and convenient coding method, and can avoid the problem of long idle time of the bus while ensuring the accuracy of data transmission. Therefore, the invention is suitable for popularization and application.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of fire protection, in particular to a fire protection industrial bus encoding method. Background technique

[0002] In the existing fire alarm control system, when using the bus to send codes, the controller host needs to pull it up in a low-level state first. When the host sends a series of data, such as "00101", the start bit of information transmission It is the first bit of data, and the time for each bit of data transmission is fixed, so the time for transmitting a series of data is also a fixed value. In this encoding method, during the process of information transmission, the clock may be advanced or delayed. Therefore, when encoding, an error occurs during the transmission of the first bit of data, which will cause the entire data encoding process to form a cumulative error. Finally, The coding is incorrect, which reduces the precision of the clocks at both ends of the communication, which in turn ...

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