CN207935759U - A kind of TVOC gas transmitters - Google Patents
A kind of TVOC gas transmitters Download PDFInfo
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- CN207935759U CN207935759U CN201820191845.7U CN201820191845U CN207935759U CN 207935759 U CN207935759 U CN 207935759U CN 201820191845 U CN201820191845 U CN 201820191845U CN 207935759 U CN207935759 U CN 207935759U
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Abstract
The utility model is related to gas detection technology field, more particularly to a kind of TVOC gas transmitters.The utility model includes single chip machine controlling circuit, the signal input part of the single chip machine controlling circuit is connected by relay circuit with the power output end of the first power supply circuit, the signal input part of single chip machine controlling circuit is connected with the signal output end of signal amplification circuit, the signal input part of the signal amplification circuit is connected with the output end of the signal acquisition circuit for acquiring toxic gas signal, and the power input of signal amplification circuit is connected with the power output end of the second power supply circuit.The utility model can carry out Site Detection to faint toxic gas, and the information warning of the toxic gas detected can be shown and be alarmed, and it is the utility model reliability height, high sensitivity, of low cost, digital signal can be transmitted to the external world by external network system, play the role of alarm.
Description
Technical field
The utility model is related to gas detection technology field, more particularly to a kind of TVOC gas transmitters.
Background technology
Toxic gas transmitter is generally applied in the industrial technical fields such as coal mine, metallurgy, these industrial technical fields
In usually due to leakage and there are a large amount of imflammable gas or toxic gas, staff is chronically at such environment
In, be easy body is damaged, therefore toxic gas transmitter sensitivity and reliability be particularly important.
Existing toxic gas transmitter is easy to be interfered by external environment, Er Qiecheng not high so as to cause sensitivity
This height, stability is bad, can not transmit a signal to external system, therefore there is an urgent need to provide a kind of high sensitivity, at low cost
The toxic gas transmitter honest and clean, stability is good.
Utility model content
The utility model in order to overcome the above-mentioned deficiencies of the prior art, provides a kind of high sensitivity, of low cost, stable
The good toxic gas transmitter of property.
Solve the problems, such as that techniques discussed above, the technical solution that the utility model is taken are：
A kind of TVOC gas transmitters include single chip machine controlling circuit, and the signal input part of the single chip machine controlling circuit is logical
It crosses relay circuit with the power output end of the first power supply circuit to be connected, the signal input part and signal of single chip machine controlling circuit
The signal output end of amplifying circuit is connected, the signal input part of the signal amplification circuit with for acquiring toxic gas signal
The output end of signal acquisition circuit be connected, the power supply output of the power input of signal amplification circuit and the second power supply circuit
End is connected, the signal output end of the single chip machine controlling circuit respectively with RS485 interface circuits, display circuit, warning circuit,
The signal input part of voltage-current converter circuit is connected.
Preferably, the single chip machine controlling circuit includes control chip, the model C8051F410 cores of the control chip
The pin 19 of piece, the C8051F410 chips is connected with relay circuit, the pins 20 of C8051F410 chips, pin 21,
Pin 22 is connected with RS485 interface circuits, and the pin 24 of C8051F410 chips is connected with signal amplification circuit,
The pin 19 of C8051F410 chips is connected with voltage-current converter circuit.
Preferably, the relay circuit includes 3rd resistor R3 and the 4th resistance R4, one end of the 3rd resistor R3,
One end of 4th resistance R4 is all connected with the pin 19 of C8051F410 chips, the other end connection the one or three of the 3rd resistor R3
The base stage of pole pipe Q1, the other end of the 4th resistance R4 connect the emitter of the first triode Q1, the first triode Q1
Collector be separately connected one end of electromagnet, the first diode D1 anode, the other end of the electromagnet, the first diode
The cathode of D1 is all connected with power supply, and the relay circuit further includes and the matched switch of electromagnet, the movable end of the switch
It is connected with an output end of the first power supply circuit, another of one of switch fixing end and the first power supply circuit are defeated
Outlet is connected.
Preferably, the signal amplification circuit includes the first amplifier A1, and the negative signal of the first amplifier A1 is defeated
Enter end to be respectively connected with one end of the 6th resistance R6, one end of the tenth resistance R10, one end of the 7th capacitance C7, the described 6th
The other end of resistance R6 be separately connected one end of the 5th resistance R5, the 8th resistance R8 one end, the 5th resistance R5's is another
End is separately connected external interface and power supply, and the other end of the 8th resistance R8 is separately connected external interface and is grounded, and described the
The positive signal input terminal of one amplifier A1 be separately connected one end of the 7th resistance R7, the 9th resistance R9 one end, the described 9th
The other end of resistance R9 is grounded, and the other end of the 7th resistance R7 connects external interface, the signal of the first amplifier A1
Output end is separately connected the other end, the other end of the 7th capacitance C7 and one end of eleventh resistor R11 of the tenth resistance R10,
The other end of the eleventh resistor R11 be separately connected one end of the 8th capacitance C8, the second zener diode D2 cathode and
The pin 24 of C8051F410 chips, the other end of the 8th capacitance C8, the anode of the second zener diode D2 are grounded.
Preferably, the RS485 interface circuits include MAX485 chips, the pin 1 of the MAX485 chips with
The pin 22 of C8051F410 chips is connected, and the pin 2,3 of MAX485 chips is connected with the pin of C8051F410 chips 20
It connects, the pin 4 of MAX485 chips is connected with the pin 21 of C8051F410 chips；The pin 6 of MAX485 chips is separately connected
One end of 14 resistance R14, one end of thirteenth resistor R13, the 4th zener diode D4 cathode and the network equipment, it is described
The pin 5 of the other end connection MAX485 chips of thirteenth resistor R13 is simultaneously grounded, the other end point of the 14th resistance R14
Not Lian Jie one end of twelfth resistor R12, the pin 7 of MAX485 chips, the cathode of third zener diode D3 and network set
Standby, the anode of the third zener diode D3, the anode of the 4th zener diode D4 are grounded, the twelfth resistor R12
The other end be separately connected the pin 8 of MAX485 chips, one end of the 9th capacitance C9 and power supply, the 9th capacitance C9's is another
One end is grounded.
Further, the chip model of the first amplifier A1 is TL27l2C chips.
Further, this toxic gas transmitter further includes external equipment, and the signal of the voltage-current converter circuit is defeated
Outlet is connected with external equipment.
Further, the external equipment includes mobile phone or computer.
Further, the display circuit is liquid crystal display, and the warning circuit is flashing light and/or buzzer.
The beneficial effects of the utility model are：
(1), the utility model includes single chip machine controlling circuit, relay circuit, signal amplification circuit, RS485 interface electricity
Road, A/D converter circuit, DA conversion circuits, display circuit, warning circuit, voltage-current converter circuit, the utility model can be right
Faint toxic gas carries out Site Detection, and the information warning of the toxic gas detected can be shown and be reported
It is alert, and the utility model reliability height, high sensitivity, of low cost, stability is good, can digital signal be passed through extranets
Network system is transmitted to the external world, plays the role of alarm.
(2), the single chip machine controlling circuit includes control chip, the model C8051F410 chips of the control chip,
C8051F410 chip processing signal speeds are fast, at low cost, C8051F410 chips and its peripheral circuit, that is, signal amplification circuit,
The structure of RS485 interface circuits is simple, is easy to build.
(3), the signal output end of the voltage-current converter circuit is connected with external equipment, can have what is detected
The information warning of poisonous gas notifies user by way of short message, plays the role of dual-alarm.
Description of the drawings
The content of every width attached drawing expression in the utility model specification and the label in figure are briefly described below：
Fig. 1 is the structure principle chart of the utility model；
Fig. 2 is the schematic diagram of the single chip machine controlling circuit of the utility model；
Fig. 3 is the schematic diagram of the relay circuit of the utility model；
Fig. 4 is the schematic diagram of the signal amplification circuit of the utility model；
Fig. 5 is the schematic diagram of the RS485 interface circuits of the utility model.
Reference numeral meaning in figure is as follows：
10-20-relay circuits of single chip machine controlling circuit
30-sensor signal amplifying circuit 40-RS485 interface circuits
50-60-warning circuits of display circuit
70-the first the 80-the second power supply circuit of power supply circuit
90-voltage-current converter circuits
Specific implementation mode
It is the shape of each component for example involved to specific embodiment of the present utility model, construction, each below against attached drawing
The effect of mutual alignment and connection relation, each section between part and operation principle etc. are described in further detail：
As shown in Figure 1, a kind of TVOC gas transmitters include single chip machine controlling circuit 10, the single chip machine controlling circuit 10
Signal input part be connected with the power output end of the first power supply circuit 70 by relay circuit 20, single chip machine controlling circuit
10 signal input part is connected with the signal output end of signal amplification circuit 30, the signal input of the signal amplification circuit 30
The output end with the signal acquisition circuit for acquiring toxic gas signal is held to be connected, the power input of signal amplification circuit 30
End is connected with the power output end of the second power supply circuit 80, the signal output end of the single chip machine controlling circuit 10 respectively with
RS485 interface circuits 40, display circuit 50, warning circuit 60, voltage-current converter circuit 90 signal input part be connected.
Further, the display circuit 50 is liquid crystal display, and the warning circuit 60 is flashing light.
Specifically, the signal acquisition circuit is gas sensor, it is described toxic for the toxic gas in collection of coal mine
Gas includes carbon monoxide, oxygen, hydrogen sulfide, hydrogen chloride, sulfur dioxide and combustible gas etc., and by collected toxic gas
Signal amplification circuit 30 is sent to be amplified.
The voltage-current converter circuit 90 exports the current signal of 4mA~20mA after converting the voltage into, to detect
To the information warning of toxic gas be transmitted to user mobile phone.
As shown in Fig. 2, the single chip machine controlling circuit 10 includes control chip, the model of the control chip
The pin 19 of C8051F410 chips, the C8051F410 chips is connected with relay circuit 20, and C8051F410 chips draw
Foot 20, pin 21, pin 22 are connected with RS485 interface circuits 40, pin 24 and the signal amplification electricity of C8051F410 chips
Road 30 is connected, and the pin 19 of C8051F410 chips is connected with voltage-current converter circuit 90.
As shown in figure 3, the relay circuit 20 includes 3rd resistor R3 and the 4th resistance R4, the 3rd resistor R3's
One end, the 4th resistance R4 one end be all connected with the pin 19 of C8051F410 chips, the other end connection of the 3rd resistor R3 the
The base stage of one triode Q1, the other end of the 4th resistance R4 connect the emitter of the first triode Q1, the one or three pole
The collector of pipe Q1 be separately connected one end of electromagnet, the first diode D1 anode, the other end of the electromagnet, the one or two
The cathode of pole pipe D1 is all connected with power supply, the relay circuit 20 further include with the matched switch of electromagnet, the switch
Movable end is connected with an output end of the first power supply circuit 70, one of switch fixing end and the first power supply circuit 70
Another output end be connected.
As shown in figure 4, the cathode that the signal amplification circuit 30 includes the first amplifier A1, the first amplifier A1 is believed
Number input terminal is connected with one end of the 6th resistance R6, one end of the tenth resistance R10, one end of the 7th capacitance C7 respectively, described
The other end of 6th resistance R6 be separately connected one end of the 5th resistance R5, the 8th resistance R8 one end, the 5th resistance R5's
The other end is separately connected external interface and power supply, and the other end of the 8th resistance R8 is separately connected external interface and is grounded, institute
State the first amplifier A1 positive signal input terminal be separately connected one end of the 7th resistance R7, the 9th resistance R9 one end, it is described
The other end of 9th resistance R9 is grounded, and the other end of the 7th resistance R7 connects external interface, the first amplifier A1's
Signal output end be separately connected the other end of the tenth resistance R10, the other end of the 7th capacitance C7 and eleventh resistor R11 one
End, the other end of the eleventh resistor R11 be separately connected one end of the 8th capacitance C8, the second zener diode D2 cathode with
And the pin 24 of C8051F410 chips, the other end of the 8th capacitance C8, the anode of the second zener diode D2 are grounded.
As shown in figure 5, the RS485 interface circuits 40 include MAX485 chips, the pin 1 of the MAX485 chips with
The pin 22 of C8051F410 chips is connected, and the pin 2,3 of MAX485 chips is connected with the pin of C8051F410 chips 20
It connects, the pin 4 of MAX485 chips is connected with the pin 21 of C8051F410 chips；The pin 6 of MAX485 chips is separately connected
One end of 14 resistance R14, one end of thirteenth resistor R13, the 4th zener diode D4 cathode and the network equipment, it is described
The pin 5 of the other end connection MAX485 chips of thirteenth resistor R13 is simultaneously grounded, the other end point of the 14th resistance R14
Not Lian Jie one end of twelfth resistor R12, the pin 7 of MAX485 chips, the cathode of third zener diode D3 and network set
Standby, the anode of the third zener diode D3, the anode of the 4th zener diode D4 are grounded, the twelfth resistor R12
The other end be separately connected the pin 8 of MAX485 chips, one end of the 9th capacitance C9 and power supply, the 9th capacitance C9's is another
One end is grounded.
B- pins, the A+ pins of the RS485 interface circuits 40 are connected with the network equipment.
First power supply circuit 70 includes MC34063 chips, for providing 2.6V power supplys.
Second power supply circuit 80 is for providing+24V power supplys.
To keep technical solutions of the utility model of greater clarity, below by way of a specific embodiment to the utility model
The course of work illustrates.
As shown in Figure 1, as shown in Figure 1, the relay circuit 20 signal input part access power supply after, switch connection,
Single chip machine controlling circuit 10 powers on, this Intelligent combustible gas transmitter is started to work, and the signal acquisition circuit acquires coal in real time
Imflammable gas in mine or toxic gas, and gas signal is converted into electric signal, and electric signal is sent to signal amplification
Circuit 30 carries out signal amplification, and the single chip machine controlling circuit 10 judges whether electric signal is more than internal pre-set threshold value,
If it exceeds the threshold, then controlling liquid crystal display shows gas information, flashing light or buzzer warning are controlled, to remind underground to make
Industry personnel's current gas is more than threshold value, meanwhile, control voltage-current converter circuit 90 converts the voltage into rear output current signal, example
Such as, output 4mA electric currents are corresponded to when voltage is 0V, and output 20mA electric currents, voltage-current converter circuit are corresponded to when voltage is 3V
40 are converted current signal by signal conversion equipment, finally by the information of conversion by SMS message transmission to user mobile phone,
Meanwhile single chip machine controlling circuit 10 controls RS485 interface circuits 40 and digital signal is transmitted to the external world by external network system.
In conclusion the utility model can carry out Site Detection to faint toxic gas, and can will detect
The information warning of toxic gas shown and alarmed.
The above content is the further descriptions made to the utility model in conjunction with specific preferred embodiment, cannot recognize
Determine specific embodiment of the present utility model and is confined to these explanations.For the common skill of the utility model technical field
For art personnel, the other embodiment obtained in the case where not departing from the technical solution of the utility model should be included in this practicality
In novel protection domain.
Claims (9)
1. a kind of TVOC gas transmitters, it is characterised in that：Including single chip machine controlling circuit (10), the single chip machine controlling circuit
(10) signal input part is connected by relay circuit (20) with the power output end of the first power supply circuit (70), microcontroller
The signal input part of control circuit (10) is connected with the signal output end of signal amplification circuit (30), the signal amplification circuit
(30) signal input part is connected with the output end of the signal acquisition circuit for acquiring toxic gas signal, signal amplification electricity
The power input on road (30) is connected with the power output end of the second power supply circuit (80), the single chip machine controlling circuit (10)
Signal output end respectively with RS485 interface circuits (40), display circuit (50), warning circuit (60), Voltage to current transducer electricity
The signal input part on road (90) is connected.
2. a kind of TVOC gas transmitters as described in claim 1, it is characterised in that：Single chip machine controlling circuit (10) packet
Include control chip, the model C8051F410 chips of the control chip, the pin 19 and relay of the C8051F410 chips
Device circuit (20) is connected, and pin 20, pin 21, the pin 22 of C8051F410 chips are connected with RS485 interface circuits (40)
It connects, the pin 24 of C8051F410 chips is connected with signal amplification circuit (30), the pin 19 and voltage of C8051F410 chips
Current converter circuit (90) is connected.
3. a kind of TVOC gas transmitters as claimed in claim 2, it is characterised in that：The relay circuit (20) includes the
Three resistance R3 and the 4th resistance R4, one end of the 3rd resistor R3, one end of the 4th resistance R4 are all connected with C8051F410 chips
Pin 19, the other end of the 3rd resistor R3 connects the base stage of the first triode Q1, the other end of the 4th resistance R4
The emitter of the first triode Q1 is connected, the collector of the first triode Q1 is separately connected one end of electromagnet, the one or two
The anode of pole pipe D1, the other end of the electromagnet, the first diode D1 cathode be all connected with power supply, the relay circuit
(20) further include and the matched switch of electromagnet, an output end of the movable end of the switch and the first power supply circuit (70)
It is connected, one of switch fixing end is connected with another output end of the first power supply circuit (70).
4. a kind of TVOC gas transmitters as claimed in claim 3, it is characterised in that：The signal amplification circuit (30) includes
The negative signal input terminal of first amplifier A1, the first amplifier A1 respectively with one end of the 6th resistance R6, the tenth resistance
One end of R10, the 7th capacitance C7 one end be connected, the other end of the 6th resistance R6 is separately connected the one of the 5th resistance R5
It holds, one end of the 8th resistance R8, the other end of the 5th resistance R5 is separately connected external interface and power supply, the 8th resistance
The other end of R8 is separately connected external interface and is grounded, and the positive signal input terminal of the first amplifier A1 is separately connected the 7th
One end of resistance R7, the 9th resistance R9 one end, the 9th resistance R9 the other end ground connection, the 7th resistance R7's is another
The signal output end of end connection external interface, the first amplifier A1 is separately connected the other end of the tenth resistance R10, the 7th electricity
Hold the other end of C7 and one end of eleventh resistor R11, the other end of the eleventh resistor R11 are separately connected the 8th capacitance
One end of C8, the cathode of the second zener diode D2 and C8051F410 chips pin 24, the 8th capacitance C8's is another
End, the positive of the second zener diode D2 are grounded.
5. a kind of TVOC gas transmitters as claimed in claim 4, it is characterised in that：RS485 interface circuits (40) packet
MAX485 chips are included, the pin 1 of the MAX485 chips is connected with the pin 22 of C8051F410 chips, MAX485 chips
Pin 2,3 is connected with the pin of C8051F410 chips 20, the pin of the pin 4 and C8051F410 chips of MAX485 chips
21 are connected；The pin 6 of MAX485 chips is separately connected one end of the 14th resistance R14, one end of thirteenth resistor R13,
The cathode and the network equipment of four zener diode D4, the other end connection MAX485 chips of the thirteenth resistor R13 draw
Foot 5 is simultaneously grounded, and the other end of the 14th resistance R14 is separately connected one end of twelfth resistor R12, MAX485 chips draw
The cathode and the network equipment of foot 7, third zener diode D3, the anode of the third zener diode D3, the 4th voltage stabilizing two
The anode of pole pipe D4 is grounded, and the other end of the twelfth resistor R12 is separately connected the 8, the 9th electricity of pin of MAX485 chips
Hold one end and the power supply of C9, the other end ground connection of the 9th capacitance C9.
6. a kind of TVOC gas transmitters as claimed in claim 4, it is characterised in that：The first amplifier A1's is chip-shaped
Number be TL27l2C chips.
7. a kind of TVOC gas transmitters as described in claim 1~6 any one, it is characterised in that：This toxic gas becomes
It further includes external equipment to send device, and the signal output end of the voltage-current converter circuit (90) is connected with external equipment.
8. a kind of TVOC gas transmitters as claimed in claim 7, it is characterised in that：The external equipment includes mobile phone or electricity
Brain.
9. a kind of TVOC gas transmitters as claimed in claim 8, it is characterised in that：The display circuit (50) is liquid crystal
Display screen, the warning circuit (60) are flashing light and/or buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820191845.7U CN207935759U (en) | 2018-02-05 | 2018-02-05 | A kind of TVOC gas transmitters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820191845.7U CN207935759U (en) | 2018-02-05 | 2018-02-05 | A kind of TVOC gas transmitters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207935759U true CN207935759U (en) | 2018-10-02 |
Family
ID=63651347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820191845.7U Active CN207935759U (en) | 2018-02-05 | 2018-02-05 | A kind of TVOC gas transmitters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207935759U (en) |
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2018
- 2018-02-05 CN CN201820191845.7U patent/CN207935759U/en active Active
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