CN112652149A - Major hazard source monitoring device - Google Patents
Major hazard source monitoring device Download PDFInfo
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- CN112652149A CN112652149A CN202110219763.5A CN202110219763A CN112652149A CN 112652149 A CN112652149 A CN 112652149A CN 202110219763 A CN202110219763 A CN 202110219763A CN 112652149 A CN112652149 A CN 112652149A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/14—Toxic gas alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/008—Alarm setting and unsetting, i.e. arming or disarming of the security system
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Abstract
The invention discloses a major hazard source monitoring device, which effectively solves the problem that emergency rescue personnel in the prior art cannot immediately obtain the specific position of a leakage point, thereby further influencing the rescue work of the emergency rescue personnel, the invention also comprises a signal detection circuit and a control processing circuit, the signal detection circuit transmits the signal detected by the ammonia gas sensor to the control processing circuit after passing through the receiver and the amplifier, the control processing circuit conducts the alarm circuit after the signal passes through the judger and transmits the signal to the monitoring center, the signal detection circuit is provided with a voltage regulator tube D1 to detect whether the concentration in the production workshop exceeds a standard value, and the power supply state of the ammonia compressor is controlled by an alternating current power supply V1 through a triode Q1 and a relay K1 in a control processing circuit, so that the ammonia compressor can be timely turned off when the ammonia concentration in a production workshop exceeds the standard.
Description
Technical Field
The invention relates to the field of monitoring and detection, in particular to a major hazard source monitoring device.
Background
The ammonia gas is one of major hazard sources, and all there is the safety standard to storage, transportation and the use of ammonia gas, correspondingly, has also set up major hazard source safety monitoring system and has detected the concentration in the air in the workshop to when the ammonia concentration value that the signal that detects represents surpassed the standard value, the sensor sends out the warning, and with signal transmission to the surveillance center, emergent rescue personnel need in time to close the ammonia compressor, in order to avoid the ammonia compressor still compressing more ammonia when the ammonia leaks.
Among the prior art, generally only set up an ammonia sensor and detect the ammonia concentration in workshop, and have the dangerous point that a plurality of ammonia were revealed in the general workshop, when the ammonia leaked, emergent rescue personnel need investigate the dangerous point one by one, and then confirm real leakage point, and this in-process ammonia continuously reveals, has very big potential safety hazard.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a major hazard source monitoring device, which effectively solves the problem that emergency rescue personnel in the prior art cannot immediately know the specific position of ammonia gas leakage to influence the rescue work of the emergency rescue personnel.
The technical scheme of its solution is, a great danger source monitoring device, including the surveillance center, monitoring device still includes signal detection circuitry, control processing circuit, signal detection circuitry transmits the signal that ammonia sensor detected to control processing circuit after receiver and amplifier, and control processing circuit then switches on alarm circuit after judging the ware with the signal process to with signal transmission to the surveillance center.
The signal detection circuit comprises an ammonia gas sensor U1, a receiver and an amplifier, wherein the receiver is used for receiving a signal detected by the ammonia gas sensor U1, the signal is amplified by the amplifier and conducts a voltage regulator tube D1, and then the signal is transmitted to the control output circuit.
The receiver comprises a resistor R1, one end of a resistor R1 is connected with an out pin of an ammonia gas sensor U1, the other end of the resistor R1 is respectively connected with one end of a resistor R2 and a base electrode of a triode Q1, a collector electrode of a triode Q1 is respectively connected with the other end of a resistor R2 and a VCC pin of the ammonia gas sensor U1 and is connected with a positive power supply VCC, an emitter electrode of a triode Q1 is connected with one end of the resistor R3, and the other end of a resistor R3 is connected with a gnd pin of the ammonia gas sensor U1 and is grounded.
The amplifier comprises a resistor R4, one end of a resistor R4 is connected with one end of a resistor R5 and a base of a triode Q2 in the receiver respectively, the other end of the resistor R4 is connected with a collector of a triode Q1 and one end of a resistor R6 and is connected with a positive power supply VCC, a collector of a triode Q2 is connected with the other end of a resistor R6 and one end of a resistor R8 respectively, an emitter of the triode Q2 is connected with one end of a resistor R7 and one end of a capacitor C1 respectively, the other end of the resistor R7 is connected with one end of a capacitor C1, the other end of a resistor R5 and the other end of a resistor R3 in the receiver respectively and is grounded, and one end of a resistor R8 is connected with a cathode of.
The control processing circuit comprises a judger and an alarm circuit, the judger receives the signal transmitted by the signal detection circuit by using a triode Q3, the output result is amplified by a triode Q4 after the signal is judged by the judger, the alarm circuit is triggered, and the signal is transmitted to the monitoring center.
The judger comprises a triode Q3, the base electrode of the triode Q3 is respectively connected with one end of a resistor R10 and the anode of a voltage regulator tube D1 in the signal detection circuit, the emitter electrode of the triode Q3 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the other end of a resistor R7 in the signal detection circuit and grounded, the collector electrode of the triode Q3 is connected with one end of a relay K1, the other end of the relay K1 is respectively connected with one end of a resistor R6 in the signal detection circuit, the other end of the resistor R4 is connected with a positive polarity power supply VCC, one end of the switch S1 is connected with one end of an alternating current power supply V1, the other end of the switch S1 is connected with a pin 2 of the ammonia compressor U2, a pin 1 of the ammonia compressor U2 is connected with the other end of the alternating current power supply V1, the other end of the resistor R10 is connected with the non-inverting end of the operational amplifier U3B, the inverting end of the operational amplifier U3B is connected with one end of the resistor R11, and the other end of the resistor R11 is connected with the other signal.
The alarm circuit comprises a resistor R13, one end of a resistor R13 is respectively connected with the base electrode of a triode Q4 and the output end of an operational amplifier U3B in the judger, the collector electrode of the triode Q4 is connected with one end of a resistor R12, the other end of a resistor R12 is respectively connected with the other end of a resistor R13, one end of a relay K2 and the other end of a relay K1 in the judger and is connected with a positive power supply VCC, the emitter electrode of the triode Q4 is respectively connected with one end of a resistor R15, the base electrode of a triode Q5, the collector electrode of a triode Q5 are respectively connected with the other end of a relay K2 and an alarm, the emitter electrode of the triode Q5 is connected with one end of a resistor R14, the other end of a resistor R14 is respectively connected with one end of a resistor R15 and the other end of a resistor R9 in the judging device and connected with the ground, one end of a switch S2 is connected with the base electrode of a triode Q3 in the judging device and the anode of a voltage stabilizing tube D1 in the signal detection circuit, and the other end of the switch S2 is connected with a monitoring center.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the signal detection circuit is provided with a voltage regulator tube D1 to detect whether the concentration in the production workshop exceeds a standard value, and the power supply state of the AC power supply V1 for the ammonia compressor is controlled by a triode Q1 and a relay K1 in a control processing circuit, so that the ammonia compressor can be closed in time when the ammonia concentration in a production workshop exceeds the standard, the power supply of the ammonia compressor is stopped, the ammonia gas is prevented from being continuously compressed when the emergency rescue personnel can not close the safety compressor U2 in time, so that more ammonia gas is leaked, the comparator with the operational amplifier U3B as the core is compared with the other path of signals detected by other ammonia sensors arranged in the production workshop, the obtained result switches on the triode Q5 through the amplification effect of the triode Q4, and then the leakage point of ammonia is shown through the effect of alarm, the rescue work of the emergency rescue personnel of convenience goes on.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
In the safety in-process of production, often can discern the dangerous point that a plurality of ammonia leaked, but according to my company's safe operation regulation to combine workshop production reality, there are two most important dangerous points of revealing in the present stage, consequently adopt 2 way sensors to monitor these two most important dangerous points in this application, and then when guaranteeing that the ammonia leaks, can fix a position the dangerous point fast, thereby eliminate the production danger.
A major hazard source monitoring device is applied to two most important hazard points, the signal acquisition module further comprises a signal detection circuit and a control processing circuit, the signal detection circuit utilizes a resistor R1 to transmit a signal acquired by an ammonia gas sensor U1 to a receiver with a triode Q1 as a core, the receiver is utilized to improve the capability of the signal to drive a post-stage circuit, the signal is amplified by a triode Q2, when a voltage stabilizing tube D1 is reversely conducted by a signal amplified by an amplifier with a triode Q2 as a core, the signal indicates that the ammonia gas concentration in a production workshop exceeds a standard value and the ammonia gas leaks, the signal is transmitted to the control processing circuit, the control processing circuit comprises a judger and an alarm circuit, the judger is utilized to receive the signal transmitted by the signal detection circuit, and the judger receives the signals in three paths, one path is received by a triode Q3, a signal transmitted by a signal detection circuit switches on a triode Q3, the triode Q3 enables a coil of a relay K1 to be electrified, a pin switch S1 of the relay K1 is switched off, at the moment, an alternating current power supply V1 cannot supply power to an ammonia compressor U1, the ammonia compressor U1 stops working, the other path transmits the signal to a comparator taking an amplifier U3B as a core and compares the signal with the other path, when the comparator outputs a high level, the concentration value detected by the ammonia sensor U1 is higher than the other path of signal detected by the other ammonia sensor, the place detected by the ammonia sensor U1 is the place where ammonia leaks, the high level triggers an alarm circuit to work, the triode Q4 amplifies the high level output by the comparator and switches on a triode Q5, the triode Q5 triggers the relay K2 to switch on an alarm, reminds rescue workers of a production workshop to start emergency rescue, a pin switch S2 of the relay K2 is changed from an open state to a closed state, a signal is transmitted to the monitoring center through a closed switch S2, workers in the monitoring center are reminded of leakage of ammonia gas, a specific place of ammonia gas leakage is displayed through a specific position in a detected production workshop of the ammonia gas sensor U1, and rescue work is started;
the signal detection circuit comprises an ammonia gas sensor U1, a receiver and an amplifier, wherein a resistor R1 is used for transmitting a signal collected by the ammonia gas sensor U1 to the receiver with a triode Q1 as a core, the ammonia gas sensor U1 adopts an ammonia gas sensor with the model similar to BSA/QT-BJ, the amplitude of the obtained signal is weak due to low ammonia gas concentration in a production workshop, the receiver is used for improving the capacity of driving a rear-stage circuit by the signal, the triode Q2 is used for amplification, the weak signal is amplified to a normal state, so as to avoid the problems that the signal amplitude is weak, the monitoring center can not accurately analyze the signal, when the voltage regulator D1 is turned on in the reverse direction by the signal amplified by the amplifier with the transistor Q2 as the core, the ammonia gas concentration in the production workshop exceeds a standard value, the ammonia gas leaks, and then a signal is transmitted to the control processing circuit;
the receiver comprises a resistor R1, one end of a resistor R1 is connected with an out pin of an ammonia gas sensor U1, the other end of the resistor R1 is respectively connected with one end of a resistor R2 and a base electrode of a triode Q1, a collector electrode of a triode Q1 is respectively connected with the other end of a resistor R2 and a VCC pin of the ammonia gas sensor U1 and is connected with a positive power supply VCC, an emitter electrode of a triode Q1 is connected with one end of the resistor R3, and the other end of a resistor R3 is connected with a gnd pin of the ammonia gas sensor U1 and is grounded;
the amplifier comprises a resistor R4, one end of a resistor R4 is connected with one end of a resistor R5 and a base electrode of a triode Q2 in the receiver respectively, the other end of the resistor R4 is connected with a collector electrode of a triode Q1 and one end of a resistor R6 and is connected with a positive power supply VCC, a collector electrode of a triode Q2 is connected with the other end of a resistor R6 and one end of a resistor R8 respectively, an emitter electrode of a triode Q2 is connected with one end of a resistor R7 and one end of a capacitor C1 respectively, the other end of a resistor R7 is connected with one end of a capacitor C1, the other end of a resistor R5 and the other end of a resistor R3 in the receiver respectively and is grounded, and the other end of one end of a resistor R;
the control processing circuit comprises a judger and an alarm circuit, the judger is used for receiving signals transmitted by the signal detection circuit, the judger is divided into two paths for receiving signals, one path is received by a triode Q3, the triode Q3 is conducted by the signals transmitted by the signal detection circuit, the triode Q3 enables a coil of a relay K1 to be electrified, a pin switch S1 of the relay K1 changes the state of the relay from closed to open, an alternating current power supply V1 cannot supply power to an ammonia compressor U1 at the moment, the ammonia compressor U1 stops working to avoid more ammonia gas leakage, the other path transmits the signals to a comparator taking an operational amplifier U3B as a core and compares the signals with another path of signals detected by another ammonia gas sensor arranged in a production workshop, when the comparator outputs high level, the concentration value detected by the ammonia gas sensor U1 is higher than that detected by the other ammonia gas sensor, the place detected by the ammonia gas sensor U1 is a place with ammonia gas leakage, the triode Q4 amplifies the high level output by the comparator, the triode Q5 is conducted, the high level triggers the alarm circuit to start working, the triode Q5 triggers the relay K2 to be conducted with the alarm, the alarm reminds emergency rescue workers outside a production workshop to start rescue work and also shows the specific place with ammonia gas leakage, the emergency rescue workers can conveniently carry out rescue work, the pin switch S2 of the relay K2 is changed from an open state to a closed state, a signal is transmitted to the monitoring center through the closed switch S2 to remind the workers of the monitoring center that ammonia gas is leaked, the specific place with ammonia gas leakage is displayed through the specific position in the production workshop detected by the ammonia gas sensor U1, and the rescue work is started;
the judger comprises a triode Q3, the base electrode of the triode Q3 is respectively connected with one end of a resistor R10 and the anode of a voltage regulator tube D1 in the signal detection circuit, the emitter electrode of the triode Q3 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the other end of a resistor R7 in the signal detection circuit and grounded, the collector electrode of the triode Q3 is connected with one end of a relay K1, the other end of the relay K1 is respectively connected with one end of a resistor R6 in the signal detection circuit, the other end of the resistor R4 is connected with a positive polarity power supply VCC, one end of the switch S1 is connected with one end of an alternating current power supply V1, the other end of the switch S1 is connected with a pin 2 of an ammonia compressor U2, a pin 1 of the ammonia compressor U2 is connected with the other end of an alternating current power supply V1, the other end of the resistor R10 is connected with the same phase end of an operational amplifier U3B, the reverse phase end of the operational amplifier U3B is connected with one end of the resistor R11, and the other end of the resistor R11 is connected with the other signal;
the alarm circuit comprises a resistor R13, one end of a resistor R13 is respectively connected with the base electrode of a triode Q4 and the output end of an operational amplifier U3B in the judger, the collector electrode of the triode Q4 is connected with one end of a resistor R12, the other end of a resistor R12 is respectively connected with the other end of a resistor R13, one end of a relay K2 and the other end of a relay K1 in the judger and is connected with a positive power supply VCC, the emitter electrode of the triode Q4 is respectively connected with one end of a resistor R15, the base electrode of a triode Q5, the collector electrode of a triode Q5 are respectively connected with the other end of a relay K2 and an alarm, the emitter electrode of the triode Q5 is connected with one end of a resistor R14, the other end of a resistor R14 is respectively connected with one end of a resistor R15 and the other end of a resistor R9 in the judging device and connected with the ground, one end of a switch S2 is connected with the base electrode of a triode Q3 in the judging device and the anode of a voltage stabilizing tube D1 in the signal detection circuit, and the other end of the switch S2 is connected with a monitoring center.
When the invention is used specifically, the signal detection circuit utilizes the resistor R1 to transmit the signal collected by the ammonia gas sensor U1 to the receiver taking the triode Q1 as the core, the receiver is utilized to improve the capability of the signal driving the post-stage circuit, the triode Q2 is utilized to amplify, when the signal amplified by the amplifier taking the triode Q2 as the core is conducted in the reverse direction of the voltage regulator tube D1, the ammonia gas concentration in a production workshop is indicated to exceed the standard value, the ammonia gas leaks, the signal is transmitted to the control processing circuit, the control processing circuit comprises a judger and an alarm circuit, the judger is utilized to receive the signal transmitted by the signal detection circuit, the judger receives the signals in three ways, one way is received by the triode Q3, the signal transmitted by the signal detection circuit conducts the triode Q3, and the triode Q3 enables the coil of the relay K1 to be electrified, the pin switch S1 of the relay K1 is disconnected, at the moment, the AC power supply V1 can not supply power to the ammonia compressor U1, the ammonia compressor U1 stops working, the other path of signal is transmitted to a comparator taking the operational amplifier U3B as a core and is compared with the other path of signal, when the comparator outputs a high level, the concentration value detected by the ammonia gas sensor U1 is higher than the other path of signal detected by the other ammonia gas sensor, the place detected by the ammonia gas sensor U1 is the place where the ammonia gas leaks, the high level triggering alarm circuit starts working, the triode Q4 amplifies the high level output by the comparator and conducts the triode Q5, the triode Q5 triggers the relay K2 to be conducted with the alarm, the alarm reminds emergency rescue personnel outside a production workshop to start the rescue work, the pin switch S2 of the relay K2 is changed from the disconnected state to the closed state, the signal is transmitted to the monitoring center through the closed switch S2, reminding workers in the monitoring center that ammonia gas leaks and the rescue operation is started;
the signal detection circuit is provided with a voltage regulator tube D1 to detect whether the concentration in the production workshop exceeds a standard value, and the power supply state of the AC power supply V1 for the ammonia compressor is controlled by a triode Q1 and a relay K1 in a control processing circuit, so that the ammonia compressor can be closed in time when the ammonia concentration in a production workshop exceeds the standard, the power supply of the ammonia compressor is stopped, the ammonia gas is prevented from being continuously compressed when the emergency rescue personnel can not close the safety compressor U2 in time, so that more ammonia gas is leaked, the comparator with the operational amplifier U3B as the core is compared with the other path of signals detected by other ammonia sensors arranged in the production workshop, the obtained result switches on the triode Q5 through the amplification effect of the triode Q4, and then the leakage point of ammonia is shown through the effect of alarm, the rescue work of the emergency rescue personnel of convenience goes on.
Claims (7)
1. The utility model provides a great danger source monitoring device, includes the surveillance center, its characterized in that, monitoring device still includes signal detection circuitry, control processing circuit, signal detection circuitry transmits the signal that ammonia gas sensor detected to the control processing circuit after receiver and amplifier in, control processing circuit then switches on alarm circuit after judging the ware with the signal to with signal transmission to surveillance center.
2. The device for monitoring the source of serious danger as claimed in claim 1, wherein the signal detection circuit comprises an ammonia gas sensor U1, a receiver and an amplifier, the receiver is used for receiving the signal detected by the ammonia gas sensor U1, the signal is amplified by the amplifier and conducts a voltage regulator tube D1, and then the signal is transmitted to the control output circuit.
3. The source-of-risk monitoring device of claim 2, wherein the receiver comprises a resistor R1, one end of the resistor R1 is connected to the out pin of the ammonia gas sensor U1, the other end of the resistor R1 is connected to one end of a resistor R2 and the base of a transistor Q1, the collector of a transistor Q1 is connected to the other end of the resistor R2 and the VCC pin of the ammonia gas sensor U1 and connected to the positive power source VCC, the emitter of the transistor Q1 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the gnd pin of the ammonia gas sensor U1 and grounded.
4. A source monitoring device as claimed in claim 2, wherein the amplifier includes a resistor R4, one end of the resistor R4 is connected to one end of the resistor R5 and the base of a transistor Q2 in the receiver, the other end of the resistor R4 is connected to the collector of the transistor Q1 and one end of the resistor R6 respectively and is connected to the positive power VCC, the collector of the transistor Q2 is connected to the other end of the resistor R6 and one end of the resistor R8 respectively, the emitter of the transistor Q2 is connected to one end of the resistor R7 and one end of the capacitor C1 respectively, the other end of the resistor R7 is connected to one end of the capacitor C1, the other end of the resistor R5 and the other end of the resistor R3 in the receiver respectively and is grounded, and the other end of the resistor R8 is connected to the cathode of the voltage regulator D1.
5. The device as claimed in claim 1, wherein the control processing circuit comprises a determiner and an alarm circuit, the determiner utilizes a transistor Q3 to receive the signal from the signal detection circuit, the signal is determined by the determiner, and the output result is amplified by a transistor Q4 to trigger the alarm circuit and simultaneously transmit the signal to the monitoring center.
6. A major hazard source monitoring device according to claim 5, wherein the determiner comprises a transistor Q3, the base of the transistor Q3 is connected to one end of a resistor R10 and the anode of a voltage regulator D1 in the signal detection circuit, the emitter of the transistor Q3 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to the other end of a resistor R7 in the signal detection circuit and grounded, the collector of the transistor Q3 is connected to one end of a relay K1, the other end of the relay K1 is connected to one end of a resistor R6 and the other end of a resistor R4 in the signal detection circuit and connected to a positive power source VCC, one end of a switch S1 is connected to one end of an AC power source V1, the other end of a switch S1 is connected to a pin 2 of an ammonia compressor U2, a pin 1 of the ammonia compressor U2 is connected to the other end of the AC power source V1, the other end of the resistor R10 is connected to the same phase terminal of an fortune, the inverting terminal of the operational amplifier U3B is connected to one terminal of the resistor R11, and the other terminal of the resistor R11 is connected to the other signal.
7. The device as claimed in claim 5, wherein the alarm circuit comprises a resistor R13, one end of the resistor R13 is connected to the base of the transistor Q4 and the output terminal of the operational amplifier U3B in the determiner, the collector of the transistor Q4 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the other end of the resistor R13, one end of the relay K2, the other end of the relay K1 in the determiner is connected to the positive polarity power source VCC, the emitter of the transistor Q4 is connected to one end of the resistor R15 and the base of the transistor Q5, the collector of the transistor Q5 is connected to the other end of the relay K2 and the alarm, the emitter of the transistor Q5 is connected to one end of the resistor R14, the other end of the resistor R14 is connected to one end of the resistor R15 and the other end of the resistor R9 in the determiner, one end of the switch S2 is connected to the base of the transistor Q3 in the determiner, The anode of a voltage regulator tube D1 in the signal detection circuit and the other end of the switch S2 are connected with the monitoring center.
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| CN112652149B (en) | 2021-12-17 |
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