CN211552921U - Fire parameter acquisition circuit structure - Google Patents
Fire parameter acquisition circuit structure Download PDFInfo
- Publication number
- CN211552921U CN211552921U CN202020615243.7U CN202020615243U CN211552921U CN 211552921 U CN211552921 U CN 211552921U CN 202020615243 U CN202020615243 U CN 202020615243U CN 211552921 U CN211552921 U CN 211552921U
- Authority
- CN
- China
- Prior art keywords
- resistor
- triode
- circuit
- temperature sensor
- grounded
- Prior art date
- 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
Links
Images
Landscapes
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Abstract
A fire parameter acquisition circuit structure comprises a power supply unit, a smoke sensing circuit and a temperature sensor circuit; the power supply unit supplies power to the smoke sensing circuit and the temperature sensor circuit; the temperature sensor circuit comprises a temperature sensor M and a 555 time-base circuit, the first end of the temperature sensor M is grounded through a resistor R10, and the second end of the temperature sensor M is connected with the first output end of the power supply unit; the first end of the temperature sensor M is also connected with the anode of a diode VD2, the cathode of the diode VD2 is connected with the first end of a sliding resistor RP2, the second end of the sliding resistor RP2 is grounded, and the sliding end of the sliding resistor RP2 is respectively connected with the pin 2 and the pin 6 of the 555 time base circuit; the temperature sensor and the 555 time base circuit form a temperature sensor circuit, the temperature sensor adopts a thermistor, when the temperature rises, the resistance value of the temperature sensor M is reduced, the voltage on the resistor R10 is increased, the voltage is transmitted into the 555 time base circuit, and the 3 feet of the 555 time base circuit output corresponding electric signals.
Description
Technical Field
The utility model relates to an acquisition circuit field, concretely relates to fire parameter acquisition circuit structure.
Background
At present, the national department and all levels of departments attach importance to the fire-fighting work, but the fire still inevitably happens occasionally, and after the fire happens, if the fire parameters of the scene can be monitored and collected in time, on the one hand, the fire condition starting alarm device can be found in time, and data can be transmitted to a fire monitoring platform. On the other hand, corresponding emergency measures can be started, primary emergency treatment is carried out on the fire situation on the site, more time can be strived for fire fighting and escape, and greater loss is avoided. The timeliness and reliability of the acquired signals is therefore of particular importance.
The signals collected by the measuring sensors produced by the manufacturers at present are easy to interfere in output and poor in accuracy, and the requirements in practical application cannot be met far away. The method has the specific defects that the measuring sensor converts the change of the acquired physical parameters into corresponding voltage signals, and judges the corresponding physical parameters through the change of the voltage signals, and because the electric signals output by the measuring sensor are generally weak and are usually millivolt-level, and in addition, the measuring sensor can have internal noise in the working process, if the electric signals output by the measuring sensor are directly transmitted into the signal processing module, the signal processing module receives the signals, the signal processing module has a large error with real data, and the data distortion rate is serious.
Therefore, in order to increase the accuracy of the measurement sensor in the parameter acquisition process and improve the anti-interference capability of the measurement sensor, a fire parameter acquisition circuit structure needs to be provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a conflagration parameter acquisition circuit structure, concrete technical scheme is as follows:
a fire parameter acquisition circuit structure comprises a power supply unit, a smoke sensing circuit and a temperature sensor circuit;
the power supply unit supplies power to the smoke sensing circuit and the temperature sensor circuit;
the temperature sensor circuit comprises a temperature sensor M and a 555 time-base circuit, wherein the first end of the temperature sensor M is grounded through a resistor R10, and the second end of the temperature sensor M is connected with the first output end of the power supply unit;
the first end of the temperature sensor M is also connected with the anode of a diode VD2, the cathode of the diode VD2 is connected with the first end of a sliding resistor RP2, the second end of the sliding resistor RP2 is grounded, and the sliding end of the sliding resistor RP2 is respectively connected with the pins 2 and 6 of the 555 time base circuit;
the first output end of the power supply unit is also connected with the anode of a diode VD1, the cathode of the diode VD1 is connected with the first end of a resistor R11, the second end of the resistor R11 is respectively connected with the 4 pin and the 8 pin of the 555 time base circuit, the second end of the resistor R11 is also connected with the first end of a first relay coil K1 through a resistor R13, the second end of the first relay coil K1 is connected with the 3 pin of the 555 time base circuit, the 3 pin of the 555 time base circuit is a signal output port of the temperature sensor circuit, and the first relay coil K1 is used for controlling a power switch of the sprinkler system;
the cathode of the diode VD1 is grounded through a capacitor C1, the second end of the resistor R11 is also connected with the cathode of a voltage regulator tube VS, and the anode of the voltage regulator tube VS is grounded;
the pin 5 of the 555 time-base circuit is grounded through a resistor R12, and a capacitor C3 is connected in parallel at two ends of the resistor R12.
For better realization the utility model discloses, can further be: the sensor M adopts a thermistor.
Further: the cathode of the diode VD2 is also connected to ground via a capacitor C2.
Further: the smoke sensing circuit comprises a smoke sensor, a triode VT1, a triode VT2, a triode VT3 and a triode VT 4;
the power supply end of the smoke sensor is connected with the second output end of the power supply unit, the grounding end of the smoke sensor is grounded through a resistor R7, the signal output end of the smoke sensor is grounded through a resistor R1, the signal output end of the smoke sensor is also connected with the base electrode of the triode VT1, and the emitter electrode of the triode VT1 is grounded through a resistor R4;
the collector of the triode VT1 is connected with the second output end of the power supply unit through a resistor R2;
the emitter of the triode VT1 is also connected with the emitter of the triode VT2, and the collector of the triode VT2 is connected with the second output end of the power supply unit through a resistor R3;
one branch of the base of the triode VT2 is grounded through a resistor R5, the other branch is connected with one end of a sliding resistor RP1, and the other end of the sliding resistor RP1 is connected with the second output end of the power supply unit;
the collector of the triode VT1 is connected with the base of the triode VT3, the emitter of the triode VT3 is connected with the collector of the triode VT2, the collector of the triode VT3 is connected with the anode of the diode VD5, the cathode of the diode VD5 is grounded through a resistor R6, the cathode of the diode VD5 is also connected with the base of the triode VT4, the emitter of the triode VT4 is grounded, the collector of the triode VT4 is connected with the second output end of the power supply unit through a second relay coil K2, the collector of the triode VT4 is a signal output port of the smoke sensing circuit, and the second relay coil K2 is used for controlling the power switch of the ventilation system.
Further: the smoke sensor is HQ-2.
The utility model has the advantages that: firstly, a temperature sensor circuit is formed by a temperature sensor and a 555 time-base circuit, the temperature sensor adopts a thermistor, when the temperature rises, the resistance value of the temperature sensor M drops, the voltage on the resistor R10 rises, the voltage is transmitted into the 555 time-base circuit, and a corresponding electric signal is output by a 3-pin of the 555 time-base circuit.
The resistor R10 is arranged to improve the resolution of the output signal of the temperature sensor by converting the temperature change into the corresponding electric signal output.
Second, the smoke sensor circuit uses HQ-2 as the sensor, which has high sensitivity, short response and recovery time, large conductivity variation, good stability, and high sensitivity to toxic and flammable gases, such as carbon monoxide and smoke.
Meanwhile, the smoke sensor circuit comprises a primary differential amplifier, and the primary differential amplifier can improve the stability of the output signal of the smoke sensor and improve the resolution ratio of the signal.
Third, the power switch of the sprinkler system is activated by the first relay coil K1, and the sprinkler system can be any standard module currently available in the market. The second relay coil K2 is provided for controlling the power switch of the ventilation system, which can also be implemented with any standard module currently available on the market. Adopt this separation to set up the benefit and lie in when going wrong, conveniently overhaul.
Drawings
FIG. 1 is a general structural diagram of the present invention;
FIG. 2 is a circuit diagram of a temperature sensor;
figure 3 is a circuit diagram of a smoke sensor.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
As shown in fig. 1 to 3: the utility model provides a fire parameter acquisition circuit structure, includes power supply unit, smog sensing circuit and temperature sensor circuit, for right the utility model discloses an application has a complete understanding, still is provided with signal processing module and wireless transmission unit in this embodiment, and wherein this signal processing module adopts the model to be CC2530, and this power supply unit's first output port and second output port provide 5V voltage and 12V voltage respectively.
The power supply unit supplies power to the smoke sensing circuit, the temperature sensor circuit, the signal processing module and the wireless transmission unit;
the output end of the smoke sensing circuit is connected with the first acquisition port of the signal processing module;
the output end of the temperature sensor circuit is connected with a second acquisition port of the signal processing module;
and the communication port of the signal processing module is connected with the input port of the wireless transmission unit.
In this embodiment, the specific structure of the temperature sensor circuit is that the temperature sensor circuit includes a temperature sensor M and a 555 time-base circuit, in this embodiment, the temperature sensor M employs a thermistor, and the 555 time-base circuit may employ a model number of 5G1555 or NE555 or LM 555. The first end of the temperature sensor M is grounded through a resistor R10, and the second end of the temperature sensor M is connected with the first output end of the power supply unit;
the first end of the temperature sensor M is also connected with the anode of a diode VD2, the cathode of the diode VD2 is connected with the first end of a sliding resistor RP2, the second end of the sliding resistor RP2 is grounded, the sliding ends of the sliding resistor RP2 are respectively connected with the pin 2 and the pin 6 of the 555 time base circuit, and the cathode of the diode VD2 is also grounded through a capacitor C2.
The first output end of the power supply unit is also connected with the anode of a diode VD1, the cathode of the diode VD1 is connected with the first end of a resistor R11, the second end of the resistor R11 is respectively connected with the 4 pin and the 8 pin of the 555 time-base circuit, the second end of the resistor R11 is also connected with the first end of a first relay coil K1 through a resistor R13, the second end of the first relay coil K1 is connected with the 3 pin of the 555 time-base circuit, the 3 pin of the 555 time-base circuit is a signal output port of the temperature sensor circuit, and the first relay coil K1 is used for controlling a power switch of the sprinkler system;
the cathode of the diode VD1 is grounded through a capacitor C1, the second end of the resistor R11 is also connected with the cathode of a voltage regulator tube VS, and the anode of the voltage regulator tube VS is grounded;
the 5 feet of the 555 time base circuit are grounded through a resistor R12, and a capacitor C3 is connected in parallel at two ends of a resistor R12.
The smoke sensing circuit comprises a smoke sensor, a triode VT1, a triode VT2, a triode VT3 and a triode VT4, wherein the smoke sensor is HQ-2.
The power supply end of the smoke sensor is connected with the second output end of the power supply unit, the grounding end of the smoke sensor is grounded through a resistor R7, the signal output end of the smoke sensor is grounded through a resistor R1, the signal output end of the smoke sensor is also connected with the base electrode of a triode VT1, and the emitter electrode of the triode VT1 is grounded through a resistor R4;
the collector of the triode VT1 is connected with the second output end of the power supply unit through a resistor R2;
the emitter of the triode VT1 is also connected with the emitter of the triode VT2, and the collector of the triode VT2 is connected with the second output end of the power supply unit through a resistor R3;
one branch of a base electrode of the triode VT2 is grounded through a resistor R5, the other branch is connected with one end of a sliding resistor RP1, and the other end of the sliding resistor RP1 is connected with a second output end of the power supply unit;
the collector of the triode VT1 is connected to the base of the triode VT3, the emitter of the triode VT3 is connected to the collector of the triode VT2, the collector of the triode VT3 is connected to the anode of the diode VD5, the cathode of the diode VD5 is grounded via the resistor R6, the cathode of the diode VD5 is further connected to the base of the triode VT4, the emitter of the triode VT4 is grounded, the collector of the triode VT4 is connected to the second output terminal of the power supply unit via the second relay coil K2, and the collector of the triode VT4 is the signal output port of the smoke sensing circuit.
The utility model discloses the principle: the power supply unit supplies power to the smoke sensing circuit, the temperature sensor circuit, the signal processing module and the wireless transmission unit;
the smoke sensing circuit and the temperature sensor circuit collect fire parameter signals and transmit the fire parameter signals to the signal processing module for processing, and the smoke sensing circuit and the temperature sensor circuit start the emergency system when the parameter values exceed the set values.
The signal processing module sends the processed signals to the wireless transmission unit, and the wireless transmission unit transmits the signals to the server side for subsequent processing.
The working process of the temperature sensor circuit is that when the temperature rises, the resistance value of the temperature sensor M drops, the voltage on the resistor R10 increases, the voltage on the sliding resistor RP2 after being rectified by the diode VD2 rises, when the temperature rises to a limit value, the voltages of a triggering end pin 2 and a threshold end pin 6 of the 555 time-base circuit rise to one third of the power voltage, the output end of the 555 time-base circuit becomes low level, the first relay coil K1 is attracted, and the first relay coil K1 controls the power supply of the watering system to be turned on. Meanwhile, the low level of the 3 pins of the 555 time-base circuit is changed into high level through the inverter, and signals are output to the signal processing module.
When the temperature is reduced to a limit value, the resistance value on the temperature sensor M is increased, the voltage on the resistor R10 is reduced, and when the voltages of the pin 2 and the pin 6 of the 555 time-base circuit are lower than one sixth of the power voltage, the pin 3 output of the 555 time-base circuit becomes high level, and the first relay coil K1 cuts off the power supply of the sprinkler system. The high level is changed to the low level through the inverter, and no signal is output. The foot 5 of the 555 time-base circuit is a control end, and the input level threshold of the 555 time-base circuit can be changed by changing the resistance value of the external resistor R3. The diode VD1 is a rectifier diode, the capacitor C1 is used for filtering the circuit, and the voltage regulator VS keeps the input voltage stable.
In this embodiment, the working flow of the smoke sensing circuit is that the transistor VT1 and the transistor VT2 form a differential amplifier circuit, and the smoke sensor, the resistor R1, the sliding resistor RP1, and the resistor R5 together form an input bridge of the differential amplifier. Before operation, the sliding resistor RP1 is adjusted so that the differential amplifier outputs a negative voltage, i.e., the collector voltage of the transistor VT1 is higher than the collector voltage of the transistor VT 2. Because the emitter of the triode VT3 is connected with the collector of the triode VT2, the collector of the VT2 is the output end of the differential amplifier, the negative pressure of the output end enables the triode VT3 to be cut off, at the moment, no current flows through the collector of the triode VT3, the triode VT4 is cut off, the collector of the triode VT4 does not output signals, and meanwhile, the second relay coil K2 does not pull in.
When the smoke sensor senses toxic gas such as smoke, the resistance value of the smoke sensor becomes small, and the degree of reduction of the resistance value is in direct proportion to the concentration of the harmful gas. At this time, the input bridge of the differential amplifier changes its original state, the collector potential of the transistor VT1 begins to fall, and the collector potential of the transistor VT2 rises. When the concentration of harmful gas in the room is accumulated to a certain degree, the output voltage of the differential amplifier becomes positive voltage, namely the collector voltage of the triode VT2 is higher than the collector voltage of the triode VT1, so that the triode VT3 is in saturated conduction. Then, the voltage across the resistor R6 rises, the transistor VT4 is also in saturation conduction, the second relay coil K2 is attracted, the second relay coil K2 is used for controlling the power supply conduction of the ventilation fan, and simultaneously, the collector of the transistor VT4 outputs a signal to the signal processing module. The resistance of the smoke sensor is gradually increased along with the indoor harmful gas is pumped and exhausted. When the resistance value is increased to a certain value, the triode VT3 is out of saturation and is turned into cutoff, the triode VT4 is also cut off, the second relay coil K2 is powered off and released, and the ventilation fan is cut off.
Claims (5)
1. The utility model provides a fire parameter acquisition circuit structure, includes power supply unit, its characterized in that: the smoke detection circuit also comprises a smoke sensing circuit and a temperature sensor circuit;
the power supply unit supplies power to the smoke sensing circuit and the temperature sensor circuit;
the temperature sensor circuit comprises a temperature sensor M and a 555 time-base circuit, wherein the first end of the temperature sensor M is grounded through a resistor R10, and the second end of the temperature sensor M is connected with the first output end of the power supply unit;
the first end of the temperature sensor M is also connected with the anode of a diode VD2, the cathode of the diode VD2 is connected with the first end of a sliding resistor RP2, the second end of the sliding resistor RP2 is grounded, and the sliding end of the sliding resistor RP2 is respectively connected with the pins 2 and 6 of the 555 time base circuit;
the first output end of the power supply unit is also connected with the anode of a diode VD1, the cathode of the diode VD1 is connected with the first end of a resistor R11, the second end of the resistor R11 is respectively connected with the 4 pin and the 8 pin of the 555 time base circuit, the second end of the resistor R11 is also connected with the first end of a first relay coil K1 through a resistor R13, the second end of the first relay coil K1 is connected with the 3 pin of the 555 time base circuit, the 3 pin of the 555 time base circuit is a signal output port of the temperature sensor circuit, and the first relay coil K1 is used for controlling a power switch of the sprinkler system;
the cathode of the diode VD1 is grounded through a capacitor C1, the second end of the resistor R11 is also connected with the cathode of a voltage regulator tube VS, and the anode of the voltage regulator tube VS is grounded;
the pin 5 of the 555 time-base circuit is grounded through a resistor R12, and a capacitor C3 is connected in parallel at two ends of the resistor R12.
2. A fire parameter acquisition circuit arrangement according to claim 1, wherein: the temperature sensor M adopts a thermistor.
3. A fire parameter acquisition circuit configuration according to claim 2, wherein: the cathode of the diode VD2 is also connected to ground via a capacitor C2.
4. A fire parameter acquisition circuit configuration according to claim 3, wherein: the smoke sensing circuit comprises a smoke sensor, a triode VT1, a triode VT2, a triode VT3 and a triode VT 4;
the power supply end of the smoke sensor is connected with the second output end of the power supply unit, the grounding end of the smoke sensor is grounded through a resistor R7, the signal output end of the smoke sensor is grounded through a resistor R1, the signal output end of the smoke sensor is also connected with the base electrode of the triode VT1, and the emitter electrode of the triode VT1 is grounded through a resistor R4;
the collector of the triode VT1 is connected with the second output end of the power supply unit through a resistor R2;
the emitter of the triode VT1 is also connected with the emitter of the triode VT2, and the collector of the triode VT2 is connected with the second output end of the power supply unit through a resistor R3;
one branch of the base of the triode VT2 is grounded through a resistor R5, the other branch is connected with one end of a sliding resistor RP1, and the other end of the sliding resistor RP1 is connected with the second output end of the power supply unit;
the collector of the triode VT1 is connected with the base of the triode VT3, the emitter of the triode VT3 is connected with the collector of the triode VT2, the collector of the triode VT3 is connected with the anode of the diode VD5, the cathode of the diode VD5 is grounded through a resistor R6, the cathode of the diode VD5 is also connected with the base of the triode VT4, the emitter of the triode VT4 is grounded, the collector of the triode VT4 is connected with the second output end of the power supply unit through a second relay coil K2, the collector of the triode VT4 is a signal output port of the smoke sensing circuit, and the second relay coil K2 is used for controlling the power switch of the ventilation system.
5. A fire parameter acquisition circuit configuration according to claim 4, wherein: the smoke sensor is HQ-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615243.7U CN211552921U (en) | 2020-04-22 | 2020-04-22 | Fire parameter acquisition circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615243.7U CN211552921U (en) | 2020-04-22 | 2020-04-22 | Fire parameter acquisition circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211552921U true CN211552921U (en) | 2020-09-22 |
Family
ID=72495746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020615243.7U Expired - Fee Related CN211552921U (en) | 2020-04-22 | 2020-04-22 | Fire parameter acquisition circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211552921U (en) |
-
2020
- 2020-04-22 CN CN202020615243.7U patent/CN211552921U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108711250B (en) | Smoke alarm device based on single chip microcomputer | |
| CN104076068B (en) | Vehicle and monitoring alarm apparatus for environment inside vehicle | |
| CN106443444A (en) | Motor operation state monitoring and management system | |
| CN211552921U (en) | Fire parameter acquisition circuit structure | |
| CN110570618B (en) | Point-type air suction type fire detection system and method based on two buses | |
| CN204086246U (en) | A kind of high performance mineral carbon monoxide transducer | |
| CN117111520A (en) | Laboratory environment monitoring system | |
| CN202093009U (en) | Intelligent toxic and harmful gas detector | |
| CN103646489A (en) | Fire hazard alarm device | |
| CN202795678U (en) | Gas alarm | |
| CN116311760A (en) | Civil building fire monitoring and early warning system based on Internet of things | |
| CN115512509A (en) | Smoke alarm system and device | |
| CN104318720A (en) | STC89C52-based smoke and gas alarm system | |
| CN203982546U (en) | A kind of suction-type coal gas leakage detection instrument | |
| CN204731648U (en) | A kind of sulfur hexafluoride gas concentration supervisory system | |
| CN109637072A (en) | A kind of household kitchen fire alarm | |
| CN202711432U (en) | Gas alarm | |
| CN211263600U (en) | Electrical detection device | |
| CN220085467U (en) | Smoke monitoring system based on GPS | |
| CN220474107U (en) | Emergency rescue command dispatching management system | |
| CN203241369U (en) | Portable combustible gas detection instrument | |
| CN208284072U (en) | A kind of SCM Based smoke alarm unit | |
| CN216925657U (en) | Temperature and humidity sensor for cabinet | |
| CN205405821U (en) | Alarming monitoring device is leaked in intelligence gas | |
| CN220271996U (en) | Safety warning robot monitoring alarm system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 Termination date: 20210422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |