Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Field wire detecting device and method for fire alarm system

A technology of fire alarm system and control device, which can be used in measuring devices, measuring electricity, alarms, etc., and can solve problems such as short-circuit faults

Active Publication Date: 2015-09-09
SIEMENS SWITZERLAND
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the MCU113 monitors that the current on the line exceeds the predetermined value, it indicates that there has been a short circuit fault between the lines

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
  • Field wire detecting device and method for fire alarm system
  • Field wire detecting device and method for fire alarm system
  • Field wire detecting device and method for fire alarm system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent components with the same or similar structures but the same functions.

[0046] In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions.

[0047] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is mar...

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 present invention proposes a control device and control method for a fire alarm system, the control device and control method being capable of monitoring an on-line impedance or inter-wire impedance of field wires. The device is connected to a line, with a capacitive element being terminally connected at a far end of the line. The method comprises: sampling at least three output voltages (V 1 , V 2 , V 3 ) of the monitoring power supply at at least three different time points (t 1 , t 2 , t 3 ), respectively, wherein the at least three time points are all before the capacitive element reaches saturation, and the time points include at least three time points which satisfy: t 2 = nt 1 , t 3 = (2n-1)t 1 , where n is an integer greater than 1; and based on the at least three output voltages (V 1 , V 2 , V 3 ), calculating an on-line impedance (Rc) or inter-wire impedance (Rs) of the line.

Description

technical field [0001] The present invention generally relates to detection of field wires (Field wire) of notification equipment (for example, fire alarm device), and more particularly relates to detection of line impedance and inter-line impedance of field wires. Background technique [0002] In a fire alarm system, a field device (Device) such as an audible alarm or a light alarm is connected to the controller (Control Panel) of the fire alarm system via a field wire (Field Wire), or called a line (Line). The controller (Control Panel) can provide driving current to each field device through this line, so that it can sound and / or flash alarm. However, field wiring may be disconnected or short-circuited due to wear and tear caused by careless installation or long-term use. The current safety standards generally require a relatively accurate judgment of line break or line break faults, that is, require immediate reporting once a fault is detected. [0003] figure 1 A sch...

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): G01R27/16G01R31/02G01R31/08
CPCG08B29/123G08B25/04G08B29/06
Inventor 朱炳海
Owner SIEMENS SWITZERLAND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com