CN2804820Y

CN2804820Y - Apparatus for monitoring temp of cable with alarming device

Info

Publication number: CN2804820Y
Application number: CN 200520085358
Authority: CN
Inventors: 曲连昌; 陈勇; 李金波
Original assignee: SHANDONG ZHONGRUI ELECTRIC CO Ltd
Current assignee: SHANDONG ZHONGRUI ELECTRIC CO Ltd
Priority date: 2005-07-16
Filing date: 2005-07-16
Publication date: 2006-08-09
Anticipated expiration: 2015-07-16

Abstract

The utility model provides a monitoring and early warning device for cable temperature, which comprises a main collector, a warning module which is connected with the main collector, a secondary collector and a plurality of temperature sensors. The utility model is characterized in that both the main collector and the secondary collector are SCMs, the temperature sensors adopt FTLD type temperature measuring cables, and are laid on the outer sheath of measured cables in a sine wave mode; the output ends of the temperature sensors are connected to the input end of the main collector or the secondary collector through a filtering module, and the secondary collector is correspondingly connected with the main collector through a serial port module RS485. The device collects the highest temperature in the total length range of measured cables through the temperature sensors, and outputs the information to the main collector or the secondary collector after filtering wave. Datum is transmitted by the secondary collector to the main collector through the serial port module RS485, and the main collector carries out data processing and stores the datum in a memory. Alarm can be carried out according to processed result, and the numbers of the temperature measuring cables are displayed. The measured result is simultaneously reported to a computer of the higher level.

Description

The cable temperature monitoring prior-warning device

Affiliated technical field

The utility model provides a kind of cable temperature monitoring prior-warning device, belongs to microcomputer automatic monitoring control technology field.

Background technology

When cable overload or damage, can produce huge heat, destroy the insulation course of cable, cause accident or breaking out of fire, existing fire detector only can be surveyed the fire that has taken place, can not forecast potential fire hazard.Traditional " point type " temperature sensor can only be surveyed " certain point " temperature, can not all cover the monitoring target of wire, so the safe operation of cable remains in weak point.

The utility model content

The purpose of this utility model provides a kind of cable temperature on-line monitoring instrument that can overcome above-mentioned defective, complete detection cable temperature and have warning function.Its technical scheme is:

Comprise main collector, connect the alarm module of main collector, from collector and some temperature sensors, it is characterized in that: main collector, be single-chip microcomputer from collector, temperature sensor adopts FTLD type cable for measuring temperature, be layed in sinusoidal wave mode above the oversheath of tested cable, its output terminal connects main collector or from the input end of collector, connects main collector from the collector correspondence by serial port module RS485 through filtration module.

Main collector, all adopt C8051F021 type single-chip microcomputer from collector, 20, the 21 pin module taking alarm of main collector, its 48～49 pin connects a grade computing machine through serial port module RS232, and respectively 54～55 pin from collector connect main collector through serial port module RS485.

Described cable temperature monitoring prior-warning device, main collector and respectively connect 8 temperature sensors at most from collector.

Described cable temperature monitoring prior-warning device, filtration module comprises inductance L 1～2 and capacitor C, wherein the output terminal of temperature sensor connects main collector or from the input end of collector, capacitor C one end ground connection, the junction of another termination inductance L 1～2 through inductance L 1～2 successively.

Its principle of work is: temperature sensor adopts the FTLD cable for measuring temperature, be layed in sinusoidal wave mode above the oversheath of tested cable, measurement range covers whole tested cable, can survey the maximum temperature in the cable length range, the signal that records outputs to main collector or from the input end of collector after filtration module filtering, from collector the conversion of signals of gathering is become digital signal after serial port module RS485 is sent to main collector, temperature data is handled and is deposited in on-chip memory by main collector, can carry out early warning or warning according to result, and demonstrate the numbering of cable for measuring temperature, simultaneously can be with measurement report higher level computing machine.Present technique realizes that by simple line the temperature online in the tested cable length range is monitored automatically, has improved the accuracy of cable fault early warning and warning, and cost is low, and is easy to use.

Description of drawings

Fig. 1 is a principle of work block diagram of the present utility model;

Fig. 2 is the partial circuit figure of the utility model embodiment.

Embodiment

Each temperature sensor H adopts the FTLD cable for measuring temperature, with sinusoidal wave mode be layed in tested cable jacket above, measurement range can cover whole tested cable, main collector D1 and from collector U1, U2 all adopts C8051F021 type single-chip microcomputer, its input end 9～16 pin are 1～2 jointing temp sensor H of the inductance L in filtration module respectively, the junction of inductance L 1～2 is through capacitor C ground connection, 19 pin of main collector D1, the corresponding module D2 taking alarm of 21 pin, main collector D1 and from collector U1, communication port 54～55 pin of U2 are all through serial port module RS485 and connect, from collector U1, U2 outputs to main collector D1 with the data of gathering, temperature data is handled and is deposited in on-chip memory by main collector D1, can carry out early warning or warning according to result, and demonstrate the numbering of cable for measuring temperature, measurement result can be connected a grade computing machine by communication port 48～49 pin through serial port module RS232 simultaneously.

Claims

1, a kind of cable temperature monitoring prior-warning device, comprise main collector, connect the alarm module of main collector, from collector and some temperature sensors, it is characterized in that: main collector, be single-chip microcomputer from collector, temperature sensor adopts FTLD type cable for measuring temperature, be layed in sinusoidal wave mode above the oversheath of tested cable, its output terminal connects main collector or from the input end of collector, connects main collector from the collector correspondence by serial port module RS485 through filtration module.

2, cable temperature monitoring prior-warning device as claimed in claim 1, it is characterized in that: main collector, all adopt C8051F021 type single-chip microcomputer from collector, 20, the 21 pin module taking alarm of main collector, its 48～49 pin connects a grade computing machine through serial port module RS232, and respectively 54～55 pin from collector connect main collector through serial port module RS485.

3, cable temperature monitoring prior-warning device as claimed in claim 1 is characterized in that: main collector and respectively connect 8 temperature sensors at most from collector.

4, cable temperature monitoring prior-warning device as claimed in claim 1, it is characterized in that: filtration module comprises inductance L 1～2 and capacitor C, wherein the output terminal of temperature sensor connects main collector or from the input end of collector through inductance L 1～2 successively, capacitor C one end ground connection, the junction of another termination inductance L 1～2.