CN2249933Y - Inspecting interface of intellectual analog fire alarm controlling system - Google Patents
Inspecting interface of intellectual analog fire alarm controlling system Download PDFInfo
- Publication number
- CN2249933Y CN2249933Y CN 96231283 CN96231283U CN2249933Y CN 2249933 Y CN2249933 Y CN 2249933Y CN 96231283 CN96231283 CN 96231283 CN 96231283 U CN96231283 U CN 96231283U CN 2249933 Y CN2249933 Y CN 2249933Y
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- CN
- China
- Prior art keywords
- interface
- circuit
- receiving
- control
- converter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fire Alarms (AREA)
Abstract
The utility model relates to an inspecting interface of intellectual analog fire alarm controlling system, which can be composed of a control interface and a detecting interface. The utility model is characterize in that the transmitting device of the control interface is composed of an encoder and a level converter; a receiving device is composed of a constant current pulse group sampler and a constant current pulse group amplifier and a counter; sending and receiving can be converted by a sending and receiving converter, and the input terminal of the sending and receiving converter is interconnected with the CPU of a fire controller through I/O circuits; the output terminal of an electronic switch is connected with the detecting interface through two buses; the detecting interface can be composed of a polarity eliminating circuit, a power generation circuit, a sending circuit, and a receiving circuit. Because the utility model is used for receiving the information of the control interface and sending the information of a detecting head to the control interface, the accuracy rating of alarms is high.
Description
The utility model is a kind of interface of patrolling and examining that the analog quantity intelligent fire detection and control system patrols widely different detection that is used for, and belongs to fire alarm control technology field.
Existing fire alarm control system is made up of fire alarm control unit and a plurality of cigarette sense detecting head usually, and alarm controller determines whether to send fire alarm according to the switching value signal of detecting head collection.Because factors such as detecting head volume restrictions and circuit are simple can only judge whether breaking out of fire according to the switching value signal of gathering, therefore, tend to cause false alarm and fail to report phenomenons such as alert.
The purpose of this utility model is at the deficiencies in the prior art, provides a kind of and changes the switching value fire alarm control system interface of patrolling and examining of analog quantity intelligent fire detection and control system into, and it helps improving the accuracy rate of fire alarm.
The utility model can be made up of a control interface and a plurality of detection interface, and control interface is placed in the fire alarm control unit, is made of dispensing device, receiving trap, transmission receiving converter and electronic switch.Dispensing device, receiving trap and transmission receiving converter all interconnect by the CPU of input and output (I/O) interface circuit and fire alarm control unit, so that accept control and the message exchange of CPU.Electronic switch is connected between dispensing device and the receiving trap, and is sent the control of receiving converter, and its output terminal is by two bus (L
1, L
2) be connected with the detection interface; Detect interface and be placed in the cigarette sense detecting head, be made of power generation circuit, receiving circuit and transtation mission circuit, the output terminal of receiving circuit is connected with the input end of transtation mission circuit by detecting head.Detect the polarity that does not need to distinguish bus when interface is connected with two buses for the ease of each, at the input end that detects interface polarity can be set and eliminate circuit.The dispensing device of control interface can be formed by scrambler and level converter serial connection, and scrambler and level converter are all sent receiving converter and control, and work when the stage of transmission, and the reception stage does not work; Receiving trap can be made of constant-current pulse group sampling and amplifier sum counter serial connection, and input end is connected with electronic switch.The receiving circuit that detects interface is made of level converter, demoder, failure detector circuit and fire indicator, and the output terminal of demoder is connected with detecting head; Transtation mission circuit is made of impedance conversion, balanced amplifier, voltage/frequency (V/F) transducer and constant current source serial connection, and the V/F transducer is subjected to the control of the demoder of receiving circuit.When control interface is in transmit status, send receiving converter and open scrambler work, by seven addressing addresses and four addressing information that CPU provides,, send electronic switch through level converter, by bus L by scrambler combination formation transmission signal
1And L
2Pass to each and detect interface.When control interface is in accepting state, sending receiving converter quits work scrambler, allowing electronic switch be transformed into the constant-current pulse group that the detection interface is sent takes a sample, amplifies and count, and count results passed to the CPU of fire alarm control unit by the I/O circuit so as to carry out fault, fire alarm is judged.The power generation circuit that detects interface provides V for detecting head
+, V
DDAnd V
EOperating voltage.When control interface is in transmit status, detect interface and be in accepting state, send signal by suitable level translation after, encourage demoder with appropriate level, if the address meets, just demoder has output V
T, provide V/F transducer working power, otherwise the V/F transducer is not worked.When detecting detecting head if desired non-fault being arranged, the output terminal of demoder sends a level to detecting head by failure detector circuit, makes detecting head be operated in fault detection status.If when fire alarm control unit had been judged the fire generation, demoder can make the fire alarm prompting device send the detecting head alerting signal.When control interface is in accepting state, sensor measuring head output level provides the V/F transducer as input signal behind impedance conversion and balanced amplifier, and the output of V/F transducer drives constant current source and sends the constant-current pulse group of reflection detecting head ambient condition information to two bus loops.
The utility model can be connected between common fire alarm control unit and the sensor measuring head, under the software control management of controller, forms the analog quantity intelligent fire detection and control system, has the high characteristics of warning accuracy rate.Control interface detects the interface interconnection by two buses and 2～128 addressings that are articulated on the bus, detecting interface provides power supply and Useful Information to detect interface to each addressing, and patrol widely different detection, detect interface and constantly ambient condition information is sent back to control interface, controller is described these information the fire process family of curves that fire takes place and is compared with being stored in advance in the controller, determine according to the rate of change of the thresholding of perception amount and perception amount whether detecting head enters alarm condition.The utility model can finish to the sensor measuring head patrol and examine functions such as addressing, environmental information collection and transmission, fault and the transmission of fire alarm information, it is the important component part that constitutes the analog quantity intelligent fire detection and control system.
Fig. 1 is a control interface structure block diagram; Fig. 2 is for detecting interface structure frame structure synoptic diagram; Fig. 3 is I/O circuit, scrambler sum counter circuit theory diagrams; Fig. 4 is level converter and electronic switching circuit schematic diagram; Fig. 5 is constant-current pulse group sampling and amplifier circuit schematic diagram; Fig. 6 eliminates circuit and power generation circuit schematic diagram for polarity; Fig. 7 is the schematic diagram of the level converter, demoder, fire indicator and the failure detector circuit that detect interface, and Fig. 8 is the schematic diagram of the impedance conversion that detects interface, balanced amplifier, V/F transducer, constant current source.
The utility model can be realized by scheme shown in the drawings.The CPU of the fire alarm control unit among Fig. 1 and 1 interconnection of I/O circuit, I/O circuit 1 can adopt IC1 shown in Figure 3 (8255); Sending receiving converter 2 is made of the CON line; Scrambler 3 can adopt IC2 (YYH26) circuit; Level converter 4 can adopt IC3:A (4001), IC3:B (4001), transistor T
10, T
11Constitute with resistance, electric capacity; Electronic switch 5 can be by transistor T
9Constitute L
1And L
2Be output bus.In order to reduce the power consumption that detects interface, make circuit working in " O " attitude and " unsettled " attitude, be provided with the unsettled attitude forming circuit of address wire in the control interface, it can be by transistor T
1～T
7, resistance R
1～R
14Constitute.In order to prevent to damage because of overcurrent, be provided with short-circuit protection circuit in the control interface, by capacitor C because of two bus short circuits make electronic switch
8, resistance R
30, transistor T
8Constitute with stabilivolt Z2.Constant-current pulse group sampling and amplifier 6 can be by capacitor C
1And C
2, resistance R
19～R
23, stabilivolt Z1, operational amplifier IC5:A and IC5:D (LM324) constitute.Counter 7 can be made of IC3:C (4001) and IC4 (4040) circuit.Polarity is eliminated circuit 8 and power generation circuit 9 can adopt circuit shown in Figure 6, by electric bridge B1, diode D
1And D
2, resistance R
1, R
2And R
7, capacitor C
1, C
3, C
4And C
5, transistor Q
2, stabilivolt Z
1And Z
3Constitute.Level converter 10, demoder 11, failure detector circuit 13 and fire indicator 12 can adopt scheme shown in Figure 7, can be by toggle switch U2 (SW-DIP8), decoding circuit U5 (YYH27), transistor Q
3And N
1, stabilivolt Z
2, light emitting diode LD and resistance constitutes.Transtation mission circuit can adopt scheme shown in Figure 8, and detecting head 17 can adopt ionic smoke sensor detecting head D; Impedance conversion, balanced amplifier 14 can be by transistor P
1, P
2, N
4With J1, stabilivolt Z
5, diode D
3Constitute with resistance, electric capacity; V/F transducer 15 can adopt U1 (7556) circuit; Constant current source 16 can be by transistor N
3, resistance R
17And R
18Constitute.Failure detector circuit 13 is by capacitor C
8, resistance R
14And R
15Constitute.
Claims (6)
1, a kind of interface of patrolling and examining that is used for the analog quantity intelligent fire detection and control system is made up of control interface and detection interface, it is characterized in that control interface is made of dispensing device, receiving trap, transmission receiving converter and electronic switch, dispensing device, receiving trap and transmission receiving converter all interconnect by the CPU of I/O interface circuit and fire alarm control unit, electronic switch is connected between dispensing device and the receiving trap, and the control of acceptance transmission receiving converter, the output terminal of electronic switch is by two bus L
1And L
2Be connected with the detection interface; Detect interface and be made of power generation circuit, receiving circuit and transtation mission circuit, the output terminal of receiving circuit is connected with the input end of transtation mission circuit by detecting head.
2, analog quantity intelligent fire detection and control system according to claim 1 patrols and examines interface, the dispensing device that it is characterized in that control interface is formed by scrambler, level converter serial connection, and scrambler and level converter are all sent the control of receiving converter; Receiving trap is made of constant-current pulse group sampling and amplifier sum counter serial connection, and input end is connected with electronic switch.
3, analog quantity intelligent fire detection and control system according to claim 1 patrols and examines interface, it is characterized in that the receiving circuit that detects interface is made of level converter, demoder, failure detector circuit and fire indicator, the output terminal of demoder is connected with detecting head; Transtation mission circuit is made of impedance conversion and balanced amplifier, V/F transducer and constant current source serial connection, and the V/F transducer is connected with the demoder of receiving circuit.
4,, it is characterized in that the input end that detects interface is provided with and bus L according to the interface of patrolling and examining of claim 1,2 or 3 described analog quantity intelligent fire detection and control systems
1And L
2The polarity that connects is eliminated circuit.
5, analog quantity intelligent fire detection and control system according to claim 4 patrol and examine interface, it is characterized in that control interface is provided with the unsettled attitude forming circuit in address, by transistor T
1～T
7, resistance R
1～R
14Constitute.
6, analog quantity intelligent fire detection and control system according to claim 5 patrol and examine interface, it is characterized in that being provided with in the control interface capacitor C
8, resistance R
30, transistor T
8Short-circuit protection circuit with stabilivolt Z2 formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231283 CN2249933Y (en) | 1996-02-12 | 1996-02-12 | Inspecting interface of intellectual analog fire alarm controlling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231283 CN2249933Y (en) | 1996-02-12 | 1996-02-12 | Inspecting interface of intellectual analog fire alarm controlling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2249933Y true CN2249933Y (en) | 1997-03-19 |
Family
ID=33908502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96231283 Expired - Fee Related CN2249933Y (en) | 1996-02-12 | 1996-02-12 | Inspecting interface of intellectual analog fire alarm controlling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2249933Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867293A (en) * | 2015-04-09 | 2015-08-26 | 中广核核电运营有限公司 | Non-intelligent fire alarm detector fault detection method and system |
-
1996
- 1996-02-12 CN CN 96231283 patent/CN2249933Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867293A (en) * | 2015-04-09 | 2015-08-26 | 中广核核电运营有限公司 | Non-intelligent fire alarm detector fault detection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |