CN2924665Y

CN2924665Y - Smoke-heat composite fire detector

Info

Publication number: CN2924665Y
Application number: CN 200520040611
Authority: CN
Inventors: 张宏强; 唐鹤权; 金之诚; 过曾肇; 舒丽艳; 高雷; 顾耀发; 钱进
Original assignee: SHANGHAI KAILUN FIRE FIGHTING EQUIPMENT CO Ltd
Current assignee: SHANGHAI KAILUN FIRE FIGHTING EQUIPMENT CO Ltd
Priority date: 2005-04-01
Filing date: 2005-04-01
Publication date: 2007-07-18
Anticipated expiration: 2015-04-01

Abstract

The utility model relates to a smoke-sensing temperature-sensing composite fire detector used for fire detection and alarming. A microprocessor is used as a core for the entire alarming circuit of the smoke-sensing temperature-sensing composite fire detector and the utility model is composed of five major modules of a signal input, a central processing, a smoke-sensing, a temperature-sensing and an output. Wherein the signal input module mainly comprises a decoding signal separation circuit. The smoke-sensing module is formed by the serial connection of a light emitting receive circuit, a smoke signal sampling and an amplification hold circuit. A thermal resistor is used as the temperature-sensing component of the temperature-sensing module. The interface of the composite fire detector of the utility model can match with a fire alarm controller of any communication protocol (like a switching amount mode, a current mode, a pulse width mode, a frequency mode, a frequency plus pulse width mode, a digital amount mode etc).

Description

Smoke and temperature inductive combined fire detector

Technical field

The utility model relates to a kind of smoke and temperature inductive combined fire detector, particularly a kind of can with the smoke and temperature inductive combined fire detector of fire alarm control unit compatibility with different communications protocol interfaces.

Background technology

Along with the develop rapidly of sensor technology, microprocessor technology and signal processing technology, compound detection has become the developing direction of auto fire-detection technology.

It is compound etc. that at present the type of combined fire detector mainly contains photoelectric smoke and temperature inductive combined, ionic smoke sensor and temperature inductive combined and photoelectric smoke, ionic smoke sensor and temperature-sensitive three.Since the eighties of last century the nineties, in the world developing combined fire detector as emphasis, the leading company that successively has many families to produce fire detecting system equipment has released the compound fire detecting system of intelligent temperature-sensitive sense cigarette, the representative especially Signature series that Edwards EST is arranged, PAM fire detector 9200 series of the AlgoRex fire detecting system of the Cerberus of Switzerland branch office and German Esser company under the Siemens SBT.The producer of present domestic production temperature-sensitive smoke fire detector has pacifies fire-fighting electronic in Beijing, center is pacified scientific and technological share for a long time, bay safety technique share and Nanjing fire-fighting electronic etc.

The manufacturing enterprise that considers fire detector nearly all produces a whole set of automatic fire alarm equipment, because rule of origin is different different with thinking when capturing a certain technical barrier, even guard secret of the trade mutually for number one between enterprise, make the circuit difference of different manufacturers panalarm, the communications protocol difference causes the product between each producer incompatible; Some factory's different series product adopts different standards, makes that same enterprise different series product is incompatible.And the fire product commercialization of present China is slower, industry lacks the universal standard, to the detection of automatic fire alarm equipment mainly according to national standards such as detector alarm requirement and experimental technique and Fire Autoalarm general technical specifications, electric, the physical characteristics of detection alarm equipment and function, and the circuit of being indifferent to wherein constitutes and communications protocol, so the incompatibility problem of automatic fire alarm system becomes increasingly conspicuous.The drawback that the incompatibility of automatic fire alarm system causes is summed up 2 points: (1) has damaged user's interests: the leeway that the user selects the warning product is very limited, and panalarm is being carried out in the maintenance process, except that the product that can only adopt original production producer keeps in repair, can the phenomenon of maintenance price costliness appear owing to new old product is incompatible also; (2) wasting of resources, the pace of product renewal is slow: user Ruo Yin device failure and can not find corresponding maintenance device, think thoroughly to rectify and improve disaster hidden-trouble again, can only change a whole set of other products, this is the wasting of resources one; Each manufacturing enterprise is all making a cart behind closed doors, and technical resource can not be shared, overlapping investment, and cost strengthens, and this is the wasting of resources two.And, market in a disguised form being monopolized because equipment room is incompatible, producer sits idle and enjoys the fruits of others' work, and develops new product no longer as possible, has prolonged the construction cycle of new product.

Summary of the invention

The utility model has overcome the deficiency in the prior art scheme, and a kind of smoke and temperature inductive combined fire detector of fire alarm control unit compatibility that can different communications protocol interfaces with having of different manufacturers is provided.

For achieving the above object, the technical solution of the utility model is:

A kind of smoke and temperature inductive combined fire detector, it is mainly handled (2), sense cigarette (3), temperature-sensitive (4) by signal input (1), central authorities and exports (5) 5 modules and form, and it is characterized in that:

The whole operating circuit of described complex detector is a core with the microprocessor of 16 bit that central authorities handle (2), decoded signal separation circuit by signal input (1), the smoke signal Acquisition Circuit of sense cigarette (3), the communication interface circuit of the temperature acquisition double integration circuit of temperature-sensitive (4) and output (5) is formed; Described complex detector is by loading different software interface module, can voltage, electric current, frequency, four kinds of basic modulation systems of pulsewidth and switching value warning system, analog quantity warning system, digital quantity warning system three class fire alarm systems connect.

Signal input module of the present utility model (1) mainly is made up of the decoded signal separation circuit, and the input of the decoded signal separation circuit calamity controller bus of starting to exchange fire, the output and the timing microprocessor of central processing module (2) are caught mouth (P1.3) and linked to each other.

The smoke signal Acquisition Circuit of sense cigarette module of the present utility model (3) is connected in sequence by light transceiver circuit, smoke signal sampling and amplification holding circuit, amplifies holding circuit output and links to each other with microprocessor comparer input port (P2.4).

Temperature-sensitive module of the present utility model (4) mainly is made up of the temperature acquisition double integration circuit, the temperature acquisition double integration circuit is by resistance R, temperature-sensing element thermistor Rt and capacitor C constitute, and circuit output links to each other with the microprocessor comparer input port (P2.3) of central processing module (2).

Output module of the present utility model (5) mainly is made up of communication interface circuit, communication interface circuit is by transistor T 1, T2 and resistance R 1, R2, R3, R4 constitutes, the microprocessor I/O mouth (P1.1) of circuit input and central processing module (2), (P2.2) link to each other, circuit is exported the calamity controller bus of starting to exchange fire.

Central authorities of the present utility model handle the microprocessor of (2) and the mu balanced circuit (6) of output 3.3V voltage links to each other.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model.

Among Fig. 1: signal input module 1 central processing module 2 sense cigarette modules 3 temperature-sensitive modules 4 output modules 5 mu balanced circuits 6.

Fig. 2,3, the 4th, software main flow chart of the present utility model.

Fig. 5 is the compatible instance graph of general-purpose interface that carries out data communication by the frequency mode.

Fig. 6 is the compatible instance graph of general-purpose interface that carries out data communication by the mode of pulsewidth.

Concrete working method:

Below in conjunction with accompanying drawing and concrete working method the utility model is further described:

According to shown in Figure 1, the utility model signal input module 1 receives the interrogating signal of tens KHz that the fire controller regularly sends, information decoding through the decoded signal separation circuit, the judgement of sense cigarette or temperature-sensitive module, the make-and-break time that adds communication modes control T1, T2 such as pulsewidth at last by P1.1 and P2.2 mouth with switching value, electric current, pulsewidth, frequency and frequency is exported on bus and is had or not fire alarm.Mu balanced circuit 6 links to each other with microprocessor, and output 3.3V voltage guarantees the detector operate as normal.

Shown in Fig. 5,6, in whole workflow, the utility model makes full use of the sleep state of CPU and interrupts arousal function: in time change sleep state (oscillator quits work) after CPU finishes signals collecting, signal Processing work over to, the CPU of this moment only consumes several μ A electric currents.Master routine only just is in normal mode of operation under following three kinds of situations: timing interrupts (decoding) to back master routine processing smoke signal, CCR1 interruption (treatment temperature signal), CCR2, all the other time CPU are in sleep state, come interim as external interrupt signal, oscillatory system can start stable operation in 6 μ A, wake CPU up and enter normal mode of operation rapidly.

Closely cooperating of common interface circuit is the key that realizes general-purpose interface among the timing acquisition system that the utility model complex detector microprocessor chip includes and Fig. 1.On the hardware circuit basis of invariable, only need adjustment member software (output module software), utilize the make-and-break time of multiple function control T1, the T2 of timing acquisition system to mate with the fire alarm control unit of various communications protocol.When the fire alarm control unit of needs couplings is when carrying out communication with current signal, connect, disconnect T1 as required, the T2 transistor just can reach communication need.For example do not have under the fire alarm situation, connect T2 and made it the loopback of 5mA electric current; When fire alarm is arranged, connect T1, T2, made it the loopback of 15mA electric current, can pass through to change R1, thereby the R2 value changes the bus current value of loopback; The fire alarm control unit that mates when needs is when carrying out communication in the pulsewidth mode, and under the timing acquisition system that microprocessor chip includes cooperated, the make-and-break time that can control T1 by the P2.2 mouth met the demands; When the fire alarm control unit of needs couplings is when adding the frequency mode and carry out communication with pulsewidth, can realize by the transistorized make-and-break time of control T1, T2.

Be illustrated by two instantiations more below.

Shown in Fig. 5,6, be connected by 2 buses between the fire controller of different manufacturers and the smoke and temperature inductive combined fire detector of the present utility model.

Example one (see figure 5): the fire controller of A producer carries out data communication by the frequency mode, and frequency is 4KHz during normal communication, and frequency was 20KHz when fire alarm was arranged.Smoke and temperature inductive combined fire detector of the present utility model obtains the inquiry message of fire controller from the bus of load module 1, information decoding through the decoded signal separation circuit, the field data information of 4KHz frequency or 20KHz frequency is exported in the judgement of internal data model at last on bus by the make-and-break time of the control of P1.1 and P2.2 mouth T1, T2.

Example two (see figure 6)s: the fire controller of B producer is to carry out data communication by the mode of pulsewidth, is the 4ms pulsewidth during normal data communication, 12ms pulsewidth when the fire alarm data are arranged.Smoke and temperature inductive combined fire detector of the present utility model obtains the inquiry message of fire controller from the bus of load module 1, information decoding through the decoded signal separation circuit, the judgement of internal data model, the make-and-break time that passes through P1.1 mouth control T2 is at last exported the field data information of 4ms pulsewidth or 12ms pulsewidth on bus.

This shows that the utility model smoke-temperature sensing fire detector hardware device when connecting with the fire controller of different manufacturer is the same, interface has versatility.

When the switching value working method: high-order (high impedance) representative is normal, and low order (Low ESR) representative has fire alarm;

When the frequency working method: normal frequency output 4KHz, frequency output 20KHz during fire alarm;

When the pulsewidth working method: normal output wave pulsewidth 4ms, output wave pulsewidth 12ms during fire alarm;

When frequency added the pulsewidth working method: under the normal condition, output frequency was 32768Hz (T1), and pulsewidth is the modulating wave of 3.2ms, and when fire alarm, output frequency is 32768Hz (T1), and pulsewidth is the modulating wave of 15ms;

When the digital quantity working method: the various combination with 0,1 is represented the information of normal or fire alarm.

Claims

1, a kind of smoke and temperature inductive combined fire detector, it is mainly handled (2), sense cigarette (3), temperature-sensitive (4) by signal input (1), central authorities and exports (5) 5 modules and form, and it is characterized in that:

A. the whole operating circuit of described complex detector is a core with the microprocessor of 16 bit that central authorities handle (2), decoded signal separation circuit by signal input (1), the smoke signal Acquisition Circuit of sense cigarette (3), the communication interface circuit of the temperature acquisition double integration circuit of temperature-sensitive (4) and output (5) is formed;

B. described complex detector is by loading different software interface module, can voltage, electric current, frequency, four kinds of basic modulation systems of pulsewidth connect with corresponding system in switching value warning system, analog quantity warning system, the digital quantity warning system three class fire alarm systems.

2, by the described smoke and temperature inductive combined fire detector of claim 1, it is characterized in that, described signal input module (1) mainly is made up of the decoded signal separation circuit, the input of the decoded signal separation circuit calamity controller bus of starting to exchange fire, the output and the timing microprocessor of central processing module (2) are caught mouth (P1.3) and are linked to each other.

3, by the described smoke and temperature inductive combined fire detector of claim 1, it is characterized in that, the smoke signal Acquisition Circuit of described sense cigarette module (3) is connected in sequence by light transceiver circuit, smoke signal sampling and amplification holding circuit, amplifies holding circuit output and links to each other with microprocessor comparer input port (P2.4).

4, by the described smoke and temperature inductive combined fire detector of claim 1, it is characterized in that, described temperature-sensitive module (4) mainly is made up of the temperature acquisition double integration circuit, the temperature acquisition double integration circuit is by resistance R, temperature-sensing element thermistor Rt and capacitor C constitute, and circuit output links to each other with the microprocessor comparer input port (P2.3) of central processing module (2).

5, by the described smoke and temperature inductive combined fire detector of claim 1, it is characterized in that, described output module (5) mainly is made up of communication interface circuit, and communication interface circuit is by transistor T 1, T2 and resistance R 1, R2, R3, R4 constitutes, the microprocessor I/O mouth (P1.1) of circuit input and central processing module (2), (P2.2) link to each other, circuit is exported the calamity controller bus of starting to exchange fire.

By the described smoke and temperature inductive combined fire detector of claim 1, it is characterized in that 6, described central authorities handle the microprocessor of (2) and the mu balanced circuit (6) of output 3.3V voltage links to each other.