CN201946085U

CN201946085U - Electrical fire monitoring transmission device

Info

Publication number: CN201946085U
Application number: CN2010206654571U
Authority: CN
Inventors: 王群英
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-08-24
Anticipated expiration: 2020-12-17

Abstract

The utility model relates to an electrical fire monitoring transmission device. A signal collected by a current leakage transformer L1 is input to an operational amplification chip U3 through an amplitude limiting filter circuit which consists of a resistor R1, a capacitor C1, a diode D1 and a diode D2, the output end of the operational amplification chip U3 is connected with a diode D3 and is then connected with a filter circuit which consists of a resistor R4 and a capacitor C3, the signal is input to the input end of an A/D (analog/digital) conversion chip U4, and a data signal after A/D conversion is then transmitted to a single-chip microcomputer IC 1 and is output in four ways under control of internal programs of the single-chip microcomputer IC 1. A current leakage acquisition circuit, a display circuit, an alarm circuit, a communication circuit interface and a carrier communication interface circuit are integrated, a large amount of wiring and a wired communication mode are eliminated, the problems of the wireless transmission technology are solved, and fires can be controlled effectively.

Description

A kind of electrical fire monitoring transmitting device

Technical field

The utility model relates to a kind of monitoring device, particularly a kind of electrical fire monitoring transmitting device.

Background technology

At present, exist the hidden danger of fire in industry and the folk power supply system always and be accompanied by the generation of disaster, it is threatening human safety of life and property constantly, becomes one of major disaster that influences human ordinary production and existence thus.Along with progress of science and technology and growth in the living standard; consuming device and power consumption all grow with each passing day; also brought the increase of electrical fire thereupon; the electrical fire major part is owing to electric leakage earth fault causes; and traditional earth leakage protective device function singleness; only has the current leakage detection protection function, effectively controlling fires.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of result is provided simple, practical electrical fire monitoring transmitting device.

The technical scheme that the utility model adopted is such: a kind of electrical fire monitoring transmitting device, the signal of being gathered by electric leakage mutual inductor L1 is through resistance R 1, capacitor C 1, the limit filtration circuit that diode D1 and diode D2 form is input to computing and amplifies chip U3, after connecting diode D3, the output terminal of computing amplification chip U3 is connected to the filtering circuit of forming by resistance R 4 and capacitor C 3, be input at last A the input end of D conversion chip U4, after the A/D conversion, data-signal is sent to single-chip microcomputer IC1, divide four tunnel outputs by the control of single-chip microcomputer IC1 internal processes, the first via connects relay J 1 by the level of single-chip microcomputer IC1 output through triode Q2, by the on-state that the switch J1-1 control T and the T1 of relay J 1 are ordered, T is connected by the one 555 time base circuit U1 with the output of T1 point, the 2 555 time base circuit U2, the carrier transmit circuit that transformer BT forms; The level of secondary route single-chip microcomputer IC output connects control loudspeaker YD; Third Road sends the driving data signal by single-chip microcomputer IC1 to LCD display chip IC2, shows current state by LCD display chip IC2; The 4th route single-chip microcomputer IC1 and 75176 communication interface chip IC3 form the communication data driving circuit, transfer two buses to by 75176 communication interface chip IC3 and are connected to PC.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this device collection electric leakage Acquisition Circuit, display circuit, warning circuit, telecommunication circuit interface, carrier communication interface circuit are one, save a large amount of wirings and two kinds of selections of wire communication pattern, touch the difficult problem of the wireless transmission lift-off technology of having determined, effectively controlling fires.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, a kind of electrical fire monitoring transmitting device, by electric leakage mutual inductor L1, adjustable resistance W, resistance R 1, triode D3, resistance R 4 grades are formed electric leakage acquisition process circuit, electric leakage mutual inductor L1 adopts the amorphous zero sequence to gather zero sequence current signal to sensor, phase line and zero line should pass zero sequence current mutual inductor simultaneously, gather leakage current signal, when phase line has earth fault, magnetic flux and no longer wait zero, electric leakage mutual inductor L1 produces small induced voltage signal, process is by resistance R 1 earlier, capacitor C 1, the limit filtration circuit that diode group D1 becomes with D2, again through resistance R 1 current limliting, resistance R 2 dividing potential drops, be input to computing and amplify the 3rd pin of chip U3, data-signal is amplified chip U3 is amplified in the back by computing the 1st pin output high level, after diode D3 rectification, insert the filtering circuit of forming by resistance R 4 and capacitor C 3, the output linear voltage, input A the 2nd pin input end of D conversion chip U4, through A after the D conversion with the 22nd of data-signal and single-chip microcomputer IC1,21,32 pin are formed data transmission circuit.Single-chip microcomputer IC1 detect A D conversion chip M1 that U4 changes some potential value, through A D conversion chip U4 data-switching, when surpassing the single-chip microcomputer IC1 inside value of setting, divide four tunnel outputs by the control of single-chip microcomputer IC1 internal processes, the first via makes triode Q2 conducting by the 23rd pin output noble potential of single-chip microcomputer IC1 through resistance R 8 current limlitings, relay J 1 adhesive, switch J1-1 makes T and T1 point be in on-state by transferring normally closed point normal battle to.The oscillatory circuit of two different frequencies that the one 555 time base circuit U1 and the 2 555 time base circuit U2 form, when M and M1 two terminal shortcircuits (short-circuit type alarm probe signal), the one 555 time base circuit constitutes low-frequency oscillatory network, mainly by connected electric capacity 1C1, resistance 1R2 decision, its 3rd pin output frequency is the low frequency signal of F1 to its frequency F1.When the 3rd pin of the one 555 time base circuit U1 is exported high level, the high-frequency oscillating circuits work that the 2 555 time base circuit U2 constitutes, its oscillation frequency F2 is mainly determined by connected electric capacity 1C3, resistance 1R4, and oscillation frequency F2 is much larger than F1, be output as the pulse-modulated signal of oscillation frequency F2 by the 3rd pin of the 2 555 time base circuit U2, this modulation signal produces the high frequency modulated pulse by the driving circuit of being made up of triode Q1, transformer BT, capacitor I C5, electric capacity 1C6 on line of electric force, the high frequency modulated pulse voltage sends the carrier wave alerting signal to the carrier wave main frame; The 4th pin output low level of secondary route single-chip microcomputer IC1 makes loudspeaker YD send the alarm sound that ticks through resistance R 6 current limlitings, and leak current fault has appearred in expression; Third Road connects to form the serial data communication circuit by the 7th, 8,27,14 pin of single-chip microcomputer IC1 and the 3rd, 4,5,6 pin of LCD display chip IC2, single-chip microcomputer IC1 sends the driving data signal to LCD display chip IC2, shows current state by LCD display chip IC2; The 10th, 11,25 pin of the 4th route single-chip microcomputer IC1 and the 1st, 2,3,4 pin of 75176 communication interface chip IC3 connect to form the communication data driving circuit, transfer two buses to by the 6th, 7 pin of 75176 communication interface chip IC3 and be connected to PC, send alert data information to PC.

More than show and described ultimate principle of the present utility model and principal character and advantage thereof; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. an electrical fire is monitored transmitting device, it is characterized in that: the signal of being gathered by electric leakage mutual inductor L1 is through resistance R 1, capacitor C 1, the limit filtration circuit that diode D1 and diode D2 form is input to computing and amplifies chip U3, after connecting diode D3, the output terminal of computing amplification chip U3 is connected to the filtering circuit of forming by resistance R 4 and capacitor C 3, be input at last A the input end of D conversion chip U4, after the A/D conversion, data-signal is sent to single-chip microcomputer IC1, divide four tunnel outputs by the control of single-chip microcomputer IC1 internal processes, the first via connects relay J 1 by the level of single-chip microcomputer IC1 output through triode Q2, by the on-state that the switch J1-1 control T and the T1 of relay J 1 are ordered, T is connected by the one 555 time base circuit U1 with the output of T1 point, the 2 555 time base circuit U2, the carrier transmit circuit that transformer BT forms; The level of secondary route single-chip microcomputer IC output connects control loudspeaker YD; Third Road sends the driving data signal by single-chip microcomputer IC1 to LCD display chip IC2, shows current state by LCD display chip IC2; The 4th route single-chip microcomputer IC1 and 75176 communication interface chip IC3 form the communication data driving circuit, transfer two buses to by 75176 communication interface chip IC3 and are connected to PC.