CN216646396U - Be applicable to combustible gas detector control circuit - Google Patents
Be applicable to combustible gas detector control circuit Download PDFInfo
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- CN216646396U CN216646396U CN202121986405.9U CN202121986405U CN216646396U CN 216646396 U CN216646396 U CN 216646396U CN 202121986405 U CN202121986405 U CN 202121986405U CN 216646396 U CN216646396 U CN 216646396U
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Abstract
The utility model discloses a control circuit suitable for a combustible gas detector, which comprises a communication module, a power supply module, a monitoring module, a control module, a state indication module, a first wiring terminal and a communication module, the monitoring module is connected with the control module, the communication module, the monitoring module and the control module are connected with the power supply module and then get electricity, the monitoring module is connected with the control module and then transmits a sensor data signal to the control module and receives a control module command signal, the input end of the communication module is connected with the first wiring terminal and then acquires a signal, the power supply module is connected with the first wiring terminal and then acquires a power supply, and the monitoring module is connected with the first wiring terminal and acquires a monitoring signal.
Description
Technical Field
The utility model relates to the technical field of fire alarms, in particular to a control circuit suitable for a combustible gas detector.
Background
With the rapid development of economy and science and technology, combustible gases such as natural gas and liquefied petroleum gas are used in urban families, factories, restaurants and other places to cook rice, boil water, burn in industry and the like more and more widely. And fire, explosion, etc. caused by leakage of combustible gas also frequently occur due to improper operation, lack of maintenance, etc. The current combustible gas detection alarm has complex circuit, high price and limited application occasions.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a control circuit for a flammable gas detector, which solves the above problems.
In order to achieve the purpose, the utility model provides the following technical scheme: a control circuit suitable for a combustible gas detector comprises a communication module, a power supply module, a monitoring module, a control module, a state indicating module and a first wiring terminal, wherein the communication module and the monitoring module are connected with the control module, the communication module, the monitoring module and the control module are connected with the power supply module and then get electricity, and the monitoring module is connected with the control module and then transmits a sensor data signal to the control module and receives a control module command signal;
the input end of the communication module is connected with a first wiring terminal to obtain a signal, the power supply module is connected with the first wiring terminal to obtain a power supply, and the monitoring module is connected with the first wiring terminal to obtain a monitoring signal;
the monitoring module comprises an induction unit and a control unit, the induction unit comprises a combustible gas sensor, an electrostatic impeder and an MOS (metal oxide semiconductor) tube, the electrostatic impeder is connected with the combustible gas sensor, and the combustible gas sensor is connected with the main control module through the MOS tube;
the control unit comprises a relay, and the relay is connected with the main control module through a third triode.
Preferably, the control module comprises a main control chip, the main control chip adopts a single chip microcomputer with twenty pins, and the connection structure of each pin of the main control chip is as follows:
power supply pin group:
the ninth pin is connected with the power supply module and then gets electricity;
the seventh pin is grounded;
the fourth pin is connected with the third wiring terminal and the power supply module;
debugging a pin group:
the eighth pin is connected with the third wiring terminal and is a debugging data pin;
the eighteenth pin is connected with the third wiring terminal and is a debugging clock pin
Input-output level pin group:
the first pin is connected with the monitoring module and used for controlling the action of the relay;
the fifth pin is connected with the communication module and then acquires a switching signal generated by the communication module;
the nineteenth pin is connected with the communication module and then acquires an amplified signal generated by the device;
the tenth pin connection state indicating module is used for indicating the communication state;
the eleventh pin is connected with the monitoring module and used for communicating with the sensor to obtain a data signal;
the twelfth pin is connected with the monitoring module and used for communicating with the clock signal of the sensor;
the fourteenth pin is connected with an address write-in end and is used for write address permission;
the sixteenth pin is connected with the monitoring module and used for communicating with a power supply control signal of the sensor;
the second pin, the third pin, the sixth pin, the thirteenth pin, the fifteenth pin, the seventeenth pin and the twentieth pin are vacant pins;
preferably, the ninth pin of the main control chip is grounded through a twenty-sixth capacitor, and a seventeenth capacitor is connected between the fourth pin and the seventh pin of the main control chip.
Preferably, the status indication module adopts a light emitting diode with a red light source color.
Preferably, the communication module includes a second transient voltage suppressor, a second common mode inductor, a fifth rectifying unit, a switching signal generating unit, and an amplified signal generating unit, the first connection terminal includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal, wherein,
two ends of the second transient voltage suppressor are respectively connected with a third binding post and a fourth binding post of the first binding post;
the input end of the second common-mode inductor is connected with the third terminal and the fourth terminal of the first terminal, the output end of the second common-mode inductor is connected with the input end of the fifth rectifying unit, the output end of the fifth rectifying unit outputs a rectifying signal, and the output end of the fifth rectifying unit is connected with the switching signal generating unit and the amplifying signal generating unit;
the output end of the switching signal generating unit is connected with the main control chip;
the output end of the amplification signal generation unit is connected with the main control chip.
Preferably, an input end of the second common mode inductor is connected to a fourth capacitor, and an input end of the fifth rectifying unit is connected to a fourteenth capacitor.
Preferably, the power supply module includes a first voltage regulation unit, a third voltage regulation unit, a first rectification unit, a second voltage regulation unit, a third rectification unit, a first inductor and a first common mode inductor, wherein,
the input end of the power supply module is respectively connected with the fifth binding post and the sixth binding post of the first binding post, and the output end of the power supply module generates working voltage for the control module to work;
the two ends of the first voltage stabilizing unit are respectively connected with a fifth binding post and a sixth binding post of the first binding post, the input end of the first common-mode inductor is respectively connected with the fifth binding post and the sixth binding post of the first binding post, the output end of the first common-mode inductor is connected with the input end of the second voltage stabilizing unit, and the output end of the second voltage stabilizing unit is connected with the first inductor, the third voltage stabilizing unit and the first rectifying unit;
preferably, the first voltage stabilizing unit adopts a voltage stabilizing diode, the third voltage stabilizing unit adopts a voltage stabilizing diode, and the second voltage stabilizing unit adopts a switching regulator.
Preferably, the first rectifying unit adopts a three-terminal voltage stabilizing module with +3.3v output voltage, and the three-terminal voltage stabilizing module has three pins, including a first pin grounded, a third pin as an input end thereof, and a second pin as an output end thereof
Preferably, the monitoring module comprises an induction unit and a control unit, the induction unit comprises a combustible gas sensor, an electrostatic impeder and an MOS (metal oxide semiconductor) tube, the combustible gas sensor adopts a four-pin type sensor, four pins of the combustible gas sensor are a pin I, a pin II, a pin III and a pin IV respectively, the pin I of the combustible gas sensor is connected with the electrostatic impeder, the pin II is connected with the electrostatic impeder through a ninth resistor, the pin III is connected with the electrostatic impeder through an eighth resistor, the pin IV is grounded, and the pin I of the combustible gas sensor is also connected with the power module through the MOS tube to obtain electricity;
a twenty-fifth resistor and a twenty-eighth resistor are connected in parallel between the first pin and the fourth pin of the combustible gas sensor;
the control unit comprises a relay, the relay adopts a HFD23005 type relay, the relay is provided with six pins and comprises a first pin and a sixth pin, the first wiring terminal is connected with the sixth pin, the second pin is connected with the power module to get power, the third pin is connected with the first wiring terminal, the fourth pin is vacant, and the fifth pin is connected with the power module through a fourth diode.
Compared with the prior art, the utility model has the beneficial effects that: the utility model simplifies the connection relation between circuits, has low cost and stable operation due to the integrated design, and has more reliable, convenient and rapid start and stop due to the introduction of the design of the double switch.
Drawings
FIG. 1 is a schematic view of the structural connection of the present invention;
FIG. 2 is a schematic diagram of a communication module according to the present invention;
FIG. 3 is a schematic diagram of a control module according to the present invention;
FIG. 4 is a schematic diagram of a power module according to the present invention;
FIG. 5 is a schematic diagram of a monitoring module according to the present invention;
FIG. 6 is a schematic diagram of a status indication module according to the present invention;
FIG. 7 is a schematic view of a first terminal of the present invention;
FIG. 8 is a schematic diagram of a sensing unit of the monitoring module according to the present invention;
FIG. 9 is a schematic diagram of a control unit of the monitoring module according to the present invention;
fig. 10 is a structural view of an indicator lamp of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a be applicable to combustible gas detector control circuit, includes communication module 100, power module 200, monitoring module 300, control module 400, status indication module 500 and first binding post J1, communication module 100 connection control chip 400, get behind control chip 400 and the monitoring module 300 connection power module 200, monitoring module 300 connects control module 400 and then transmits sensor data signal and receives control module 400 command signal to control module 400.
The input end of the communication module 100 is connected with a first wiring terminal J1 to obtain a signal, the power module 200 is connected with a first wiring terminal J1 to obtain a power supply, and the monitoring module 400 is connected with a first wiring terminal J1 to obtain a monitoring signal.
The monitoring module 300 comprises a sensing unit and a control unit, wherein the sensing unit comprises a combustible gas sensor P2, an electrostatic resistor D6 and a MOS (metal oxide semiconductor) tube Q4, the electrostatic resistor D6 is connected with the combustible gas sensor P2, and the combustible gas sensor P2 is connected with the main control module 400 through the MOS tube Q4;
the control unit comprises a relay JDQ1, and the relay JDQ1 is connected with the main control module 400 through a third triode Q3.
In some embodiments, the power module 200 may output an operating voltage of +3.3V, an operating voltage of 5V, and an operating voltage of 24V.
In some embodiments, referring to fig. 1 to 10, the control module 400 includes a main control chip U5, the main control chip U5 is a single chip microcomputer with twenty pins, and the connection structure of each pin of the main control chip U5 is as follows:
the first pin is connected with the monitoring module and used for controlling the relay JDQ1 to act;
the fourth pin is a reset pin, is connected with the power supply module 200 through a twenty-first resistor R21, and passes through
The fifth pin is connected with the communication module and then acquires an amplification signal generated by the communication module, and the amplification signal is defined as a DAT pin;
the seventh pin is grounded;
the eighth pin is a debug data pin ICPDA, and is connected to the second terminal 2 of the third terminal P3.
The ninth pin is connected with the power module 200 and then powered, and is grounded through a twenty-sixth capacitor;
the tenth pin is connected to the LED of the status indication module 500, and is used for indicating a communication status;
the eleventh pin is connected with the monitoring module 300 and is connected with the power supply module 200 through a twenty-third resistor R23;
the twelfth pin is connected with the monitoring module 300 and is connected with the power supply module 200 through a twelfth resistor R22;
the fourteenth pin is used for writing address permission, is connected with an address writing end J2 through a forty-third resistor R43 and is connected with the power supply module 200 through a twelfth resistor R42;
the sixteenth pin is connected with the monitoring module 300;
the eighteenth pin is connected with a third wiring terminal P3;
the nineteenth pin is connected with the communication module 100, and then the switching signal generated by the acquirer is defined as an ANS pin;
the second pin, the third pin, the sixth pin, the thirteenth pin, the fifteenth pin, the seventeenth pin and the twentieth pin are vacant pins.
In some preferred embodiments, the status indication module employs a light emitting diode D8 with a red light source, and the tenth pin of the main control chip U5 is connected to the light emitting diode D8 through a thirty-one resistor R31.
In some preferred embodiments, the main control chip U5 is an N76E003 type single chip.
In some embodiments, referring to fig. 1, 2 and 7, the communication module 100 includes a second transient voltage suppressor D2, a second common mode inductor T2, a fifth rectifying unit D5, a switching signal generating unit, and an amplified signal generating unit, and the first connection terminal J1 includes a first connection terminal 1, a second connection terminal 2, a third connection terminal 3, a fourth connection terminal 4, a fifth connection terminal 5 and a sixth connection terminal 6, wherein,
two ends of the second transient voltage suppressor D2 are respectively connected with the third pin 3 and the fourth pin 4 of the first connection terminal J1;
two input ends of the second common mode inductor T2 are respectively connected with the third pin 3 and the fourth pin 4 of the first connection terminal J1;
the input end of the second common-mode inductor T2 is connected to the third terminal 3 and the fourth terminal 4 of the first terminal J1, the output end of the second common-mode inductor T2 is connected to the input end of the fifth rectifying unit D5, the output end of the fifth rectifying unit D5 outputs a rectified signal S + +, a third resistor R3 is connected between the positive electrode and the negative electrode of the output end of the fifth rectifying unit D5, and the output end of the fifth rectifying unit D5 is connected to the switching signal generating unit and the amplification signal generating unit;
the output end of the amplification signal generation unit is connected with a DAT pin of the main control chip U5. The amplification signal generation unit comprises a first triode Q1, the first triode Q1 is an NPN type triode, the base electrode of the first triode is grounded through a fourth resistor R4, the emitter electrode of the first triode is grounded, and the collector electrode of the first triode is used as the output end of the amplification signal generation unit and is connected with the fifth pin of the main control chip U2, the collector electrode of the first triode is further connected with the power module 200 through a sixteenth resistor R16 to obtain electricity, the base electrode of the first triode Q1 is further connected with the positive output end of the first rectification unit through a second resistor R2, a first resistor R1 and a fifteenth capacitor C15, the base electrode of the first triode Q1 is connected with the positive output end of the first rectification unit, namely the S + + signal output end is connected, and a sixteenth capacitor C16 is connected to the fourth resistor R4 and the second resistor R2 in parallel;
the output end of the switching signal generating unit is connected with an ANS pin of the main control chip U5, the switching signal generating unit comprises a second triode Q2 and a fifth triode Q5, the second triode Q2 is a PNP type triode, the fifth triode Q5 is an NPN type triode, the base electrode of the second triode Q2 is connected with the ANS pin of the main control chip U5 through an eighteenth resistor R18, the collector electrode of the second triode Q2 is connected with the base electrode of the fifth triode Q5 through a nineteenth resistor R19, the emitter electrode of the second triode Q2 is connected with the power module 200 to take power, and the base electrode of the second triode Q2 is connected with the power module 200 to take power through a seventeenth resistor R17; an emitter of the fifth triode Q5 is grounded through a twenty-sixth resistor R26, a base thereof is grounded through a twenty-fourteen resistor R24, and a collector thereof is connected to the output terminal S + + of the fifth rectifying unit D5 through a twenty-fifth resistor R25.
In some preferred embodiments, the fifth rectifying unit is an M4148S type rectifying bridge, and the positive pole of the output end outputs S + + signal and the negative pole is grounded.
In some preferred embodiments, the first transistor Q1 is a 3904 transistor, the second transistor Q2 is a 3906 transistor, the second transistor Q5 is a 5551 transistor, the second tvs D2 is SMBJ36CA tvs diode, and the second common mode inductor T2 is a SF0904 common mode inductor.
In some embodiments, referring to fig. 1, 6 and 7, the power module 200 includes a first voltage regulation unit D1, a third voltage regulation unit D3, a first rectification unit U1, a second voltage regulation unit U2, a third rectification unit U3, a first inductor L1 and a first common mode inductor T1, wherein an input end of the power module 200 is connected to the fifth terminal 5 and the sixth terminal 6 of the first terminal J1, and an output end generates an operating voltage for the control module 400 to operate; two ends of the first voltage stabilizing unit D1 are respectively connected to a fifth terminal 5 and a sixth terminal 6 of a first terminal J1, an input end of the first common mode inductor T1 is respectively connected to the fifth terminal 5 and the sixth terminal 6 of the first terminal J1, an output end of the first common mode inductor T1 is connected to an input end of a third rectifying unit U3, and an output end of the third rectifying unit U3 is connected to a second voltage stabilizing unit U2 and a third voltage stabilizing unit D3;
the first common mode inductor T1 has four pins, pin 1 and pin 2 are connected to the input terminal of the third rectifying unit U3, pin 3 is connected to the fifth terminal 5 of the first terminal J1, pin 4 is connected to the sixth terminal 6 of the first terminal J1, and a first capacitor C1 is connected between pin 3 and pin 4, and a second capacitor C2 is connected between pin 1 and pin 2.
The third rectifying unit U3 has four pins, which are divided into two input pins and two output pins, the input pin 1 of the third rectifying unit U3 is connected to the pin 2 of the first common mode inductor T1, the input pin 2 of the third rectifying unit U3 is connected to the pin 1 of the first common mode inductor T1, the output pin 3 (V + pin) of the third rectifying unit U3 is a +24V power output terminal, the output pin 4 (V-pin) of the third rectifying unit U3 is grounded, and a tenth capacitor C10 is connected between the output pin 3 and the output pin 4 of the third rectifying unit U3 in parallel.
The first rectifying unit U1 is a three-terminal type single chip microcomputer having three pins, including a third pin (VIN pin) as its input terminal, a second pin (Vout pin) as its output terminal, and a first pin (GND pin) grounded, and the second pin (Vout pin) outputs a working voltage for the operation of the control module 400, the communication module 100, and the monitoring module 500. in addition, an eighth capacitor C8 and an eleventh capacitor C11 are connected in parallel between the first pin (GND pin) and the second pin (Vout pin), and a ninth capacitor C9 is connected between the first pin (GND pin) and the third pin (VIN pin).
The second voltage stabilizing unit U2 has eight pins, including a first pin (BS pin) connected to the input terminal (vin pin) of the first rectifying unit U1 through a fifth capacitor C5 and a first inductor L1, a second pin (IN pin) grounded through a third capacitor C3, a third pin (SW pin) connected to the input terminal (vin pin) of the first rectifying unit U1 through a first inductor L1, a fourth pin (GND pin) grounded, a fifth pin (FB pin) connected to the input terminal (vin pin) of the first rectifying unit U1 through a sixth resistor R6, a sixth pin (CP pin) grounded through a twenty-capacitor R20, a seventh pin (EN) connected to a + V24 REF 24V power supply through a fifth resistor R5, and an eighth pin (pin) grounded through a twenty-seventh resistor R27, in addition, the fifth pin (FB pin) of the second regulator unit U2 is further grounded through a thirteenth resistor R13, and two ends of the twentieth capacitor R20 are further connected in series with a sixth capacitor C6 and a twelfth resistor R12.
The anode of the third voltage regulation unit D3 is connected to ground, and the cathode is connected to the input terminal (vin pin) of the first rectification unit U1 through the first inductor L1.
One end of a twelfth capacitor C12 and one end of a seventh capacitor C7 are connected between the first inductor L1 and the input end (VIN pin) of the first rectifying unit U1, the other ends of the twelfth capacitor C12 and the seventh capacitor C7 are grounded, and a +5V operating voltage output end is arranged between the first inductor L1 and the input end (VIN pin) of the first rectifying unit U1.
In some preferred embodiments, the second voltage regulation unit U2 is a model MP2403 switch controller.
In some preferred embodiments, the first rectifying unit U1 adopts an AMS1117-3.3 type voltage stabilizing chip.
In some preferred embodiments, the third rectifying unit U3 adopts a model MB6S diode rectifying bridge.
In some preferred embodiments, the first common mode inductor T1 is a type SF0904 patch inductor.
In some preferred embodiments, the first voltage stabilizing unit D1 adopts an SMBJ36CA type transient voltage suppression diode, and the third voltage stabilizing unit adopts a voltage stabilizing diode.
In some preferred embodiments, referring to fig. 1, 7, and 8, the monitoring module 300 includes a sensing unit and a control unit.
The sensing unit comprises a combustible gas sensor P2, an electrostatic impeder D6 and an MOS tube Q4, wherein the combustible gas sensor P2 is provided with four pins, the four pins of the combustible gas sensor P2 are a pin I1, a pin II 2, a pin III 3 and a pin IV 4 respectively, the pin I1 of the combustible gas sensor P2 is connected with the electrostatic impeder D6, the pin II 2 is connected with the electrostatic impeder D6 through a ninth resistor R9 and is connected with an SDA pin of the main control chip U5, the pin III 3 is connected with the electrostatic impeder D6 through an eighth resistor R8 and is connected with an SCL pin and the pin IV 4 of the main control chip U5 to be grounded, and the pin I1 of the combustible gas sensor P2 is also connected with a power module 200 through the MOS tube Q4 to take electricity;
a twenty-fifth resistor R25 and a twenty-eighth resistor R18 are further connected in parallel between the first pin 1 and the fourth pin 4 of the combustible gas sensor P2;
the drain of the MOS transistor Q4 is connected to pin one 1 of the combustible gas sensor P2, the source is connected to the output terminal (VOUT pin) of the first rectification unit U1 of the power module 200, and the gate is connected to the SENP pin of the main control chip U5 through a fifteenth resistor R15, and in addition, a fourteenth resistor R14 is connected between the source and the gate of the MOS transistor Q4.
The control unit comprises a relay JDQ1, a third triode Q3 and a fourth diode D4, the relay JDQ1 adopts a HFD23005 type relay which is provided with six pins, the relay JDQ1 comprises a first pin 1 and a sixth pin 6 which are connected with a first binding post 1 of a first binding post J1, a second pin 2 which is connected with a +5V working voltage output end of the power module 200 to obtain electricity, a third pin 3 which is connected with a second binding post 2 of a first binding post J1, a fourth pin 4 which is vacant, a fifth pin 5 which is connected with an anode of the fourth diode D4, and a cathode of the fourth diode is connected with a +5V working voltage output end of the power module 200; the third transistor Q3 is an NPN transistor, and has a base connected to the CTRL pin of the main control chip U5 through a twentieth resistor R20, an emitter grounded, and a collector connected to the fifth pin 5 of the relay JDQ 1.
In some preferred embodiments, the esd resistor D6 is of a type PESD3V3L4, and includes four zener diodes, the first pin 1, the second pin 2, and the third pin 3 of the combustible gas sensor P2 are respectively connected to cathodes of three of the zener diodes of the esd resistor D6, and anodes of the four zener diodes of the esd resistor D6 are grounded.
In some preferred embodiments, the MOS transistor Q4 is a P-channel MOS transistor of type SI 2301.
In some preferred embodiments, the relay JDQ1 is a type HFD23/005-1ZS relay.
In some preferred embodiments, the third transistor Q3 is a model S8050 patch transistor, and the fourth diode is a model 4148 patch diode.
In some embodiments, as shown in fig. 4, the third connection terminal P3 has five pins, including a first pin 1 connected to the output terminal of the first rectifying unit U1 of the power module 200 for power, a second pin 2 connected to the icdpa pin of the main control chip U5, a third pin 3 connected to the ICPCK pin of the main control chip U5, a fourth pin 4 connected to the nRST pin of the main control chip U5, and a fifth pin grounded.
In some embodiments, as shown in fig. 5, the address write terminal J2 has 8 pins, including a first pin 1 and a seventh pin 7 connected to the output terminal (S + + signal terminal) of the communication module 100, a second pin 2 connected to ground, a third pin 2 and a fourth pin 4 connected to the WR pin of the main control chip U5, a fifth pin 5 connected to ground, a sixth pin 6 connected to the +24V operating voltage output terminal of the power module 200, and an eighth pin 8 left vacant.
The working principle is as follows: j1 provides carrier signal for module 100, and the module 100 realizes providing 400 input signal after the decoding simultaneously, and the module 400 provides drive signal for the module 500 and lights up pilot lamp D8(R), and J1 provides power signal for the module 200, and the module 200 is after stepping down and for module 300 and module 400 provide supply voltage, and the module 400 detects combustible gas sensor data signal behind the module 300, provides drive signal for the module 500 and lights up.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a be applicable to combustible gas detector control circuit, includes communication module, power module, monitor module, control module, status indication module, first binding post, its characterized in that: the communication module and the monitoring module are connected with the control module, the communication module, the monitoring module and the control module are connected with the power supply module and then get electricity, and the monitoring module is connected with the control module and then transmits a sensor data signal to the control module and receives a control module command signal;
the input end of the communication module is connected with a first wiring terminal to obtain a signal, the power supply module is connected with the first wiring terminal to obtain a power supply, and the monitoring module is connected with the first wiring terminal to obtain a monitoring signal;
the monitoring module comprises an induction unit and a control unit, the induction unit comprises a combustible gas sensor, an electrostatic impeder and an MOS (metal oxide semiconductor) tube, the electrostatic impeder is connected with the combustible gas sensor, and the combustible gas sensor is connected with the control module through the MOS tube;
the control unit comprises a relay, and the relay is connected with the control module through a third triode.
2. A control circuit adapted for use with a combustible gas detector according to claim 1, wherein: the control module comprises a main control chip, the main control chip adopts a single chip microcomputer with twenty pins, and the connection structure of each pin of the main control chip is as follows:
power supply pin group:
the ninth pin is connected with the power supply module and then gets electricity;
the seventh pin is grounded;
the fourth pin is connected with the third wiring terminal and the power supply module;
debugging a pin group:
the eighth pin is connected with the third wiring terminal and is a debugging data pin;
the eighteenth pin is connected with the third wiring terminal and is used as a pin for debugging the clock
Input-output level pin group:
the first pin is connected with the monitoring module and used for controlling the action of the relay;
the fifth pin is connected with the communication module and then acquires a switching signal generated by the communication module;
the nineteenth pin is connected with the communication module and then acquires an amplified signal generated by the device;
the tenth pin connection state indicating module is used for indicating the communication state;
the eleventh pin is connected with the monitoring module and used for communicating with the sensor to obtain a data signal;
the twelfth pin is connected with the monitoring module and used for communicating with the clock signal of the sensor;
the fourteenth pin is connected with an address writing end and used for writing address permission;
the sixteenth pin is connected with the monitoring module and used for communicating with a power supply control signal of the sensor;
the second pin, the third pin, the sixth pin, the thirteenth pin, the fifteenth pin, the seventeenth pin and the twentieth pin are vacant pins.
3. A control circuit adapted for use with a combustible gas detector according to claim 2, wherein: the ninth pin of the main control chip is grounded through a twenty-sixth capacitor, and a seventeenth capacitor is connected between the fourth pin and the seventh pin of the main control chip.
4. A control circuit adapted for use with a combustible gas detector according to claim 3, wherein: the state indicating module adopts a light emitting diode with a red light source color.
5. A control circuit for a combustible gas detector according to claim 4, wherein: the communication module comprises a second transient voltage suppressor, a second common mode inductor, a fifth rectifying unit, a switching signal generating unit and an amplifying signal generating unit, the first wiring terminal comprises a first wiring terminal, a second wiring terminal, a third wiring terminal, a fourth wiring terminal, a fifth wiring terminal and a sixth wiring terminal, wherein,
two ends of the second transient voltage suppressor are respectively connected with a third binding post and a fourth binding post of the first binding post;
the input end of the second common-mode inductor is connected with the third terminal and the fourth terminal of the first terminal, the output end of the second common-mode inductor is connected with the input end of the fifth rectifying unit, the output end of the fifth rectifying unit outputs a rectifying signal, and the output end of the fifth rectifying unit is connected with the switching signal generating unit and the amplifying signal generating unit;
the output end of the switching signal generating unit is connected with the main control chip;
the output end of the amplification signal generation unit is connected with the main control chip.
6. A control circuit for a combustible gas detector according to claim 5, wherein: the input end of the second common mode inductor is connected with a fourth capacitor, and the input end of the fifth rectifying unit is connected with a fourteenth capacitor.
7. A control circuit for a combustible gas detector according to claim 6, wherein: the power supply module comprises a first voltage stabilizing unit, a third voltage stabilizing unit, a first rectifying unit, a second voltage stabilizing unit, a third rectifying unit, a first inductor and a first common-mode inductor,
the input end of the power supply module is respectively connected with the fifth binding post and the sixth binding post of the first binding post, and the output end of the power supply module generates working voltage for the control module to work;
the two ends of the first voltage stabilizing unit are respectively connected with a fifth binding post and a sixth binding post of the first binding post, the input end of the first common mode inductor is respectively connected with the fifth binding post and the sixth binding post of the first binding post, the output end of the first common mode inductor is connected with the input end of the second voltage stabilizing unit, and the output end of the second voltage stabilizing unit is connected with the first inductor, the third voltage stabilizing unit and the first rectifying unit.
8. A control circuit adapted for use with a combustible gas detector according to claim 7, wherein: the first voltage stabilizing unit adopts a voltage stabilizing diode, the third voltage stabilizing unit adopts a voltage stabilizing diode, and the second voltage stabilizing unit adopts a switching regulator.
9. A control circuit adapted for use with a combustible gas detector according to claim 8, wherein: the first rectifying unit adopts a three-terminal voltage stabilizing module with +3.3v of output voltage, and the three-terminal voltage stabilizing module is provided with three pins, wherein the three pins comprise a first pin which is grounded, a third pin which is an input end of the first pin, and a second pin which is an output end of the second pin.
10. A control circuit adapted for use with a combustible gas detector according to claim 1, wherein: the monitoring module comprises an induction unit and a control unit, the induction unit comprises a combustible gas sensor, an electrostatic impeder and an MOS (metal oxide semiconductor) tube, the combustible gas sensor adopts a four-pin type sensor, four pins of the combustible gas sensor are a pin I, a pin II, a pin III and a pin IV respectively, the pin I of the combustible gas sensor is connected with the electrostatic impeder, the pin II of the combustible gas sensor is connected with the electrostatic impeder through a ninth resistor, the pin III of the combustible gas sensor is connected with the electrostatic impeder through an eighth resistor, the pin IV of the combustible gas sensor is grounded, and the pin I of the combustible gas sensor is also connected with the power module through the MOS tube to obtain electricity;
a twenty-fifth resistor and a twenty-eighth resistor are connected in parallel between the first pin and the fourth pin of the combustible gas sensor;
the control unit comprises a relay, the relay adopts a HFD23005 type relay, the relay is provided with six pins and comprises a first pin and a sixth pin, the first wiring terminal is connected with the sixth pin, the second pin is connected with the power module to get power, the third pin is connected with the first wiring terminal, the fourth pin is vacant, and the fifth pin is connected with the power module through a fourth diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121986405.9U CN216646396U (en) | 2021-08-23 | 2021-08-23 | Be applicable to combustible gas detector control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121986405.9U CN216646396U (en) | 2021-08-23 | 2021-08-23 | Be applicable to combustible gas detector control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN216646396U true CN216646396U (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121986405.9U Active CN216646396U (en) | 2021-08-23 | 2021-08-23 | Be applicable to combustible gas detector control circuit |
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| CN (1) | CN216646396U (en) |
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