CN207937423U - A kind of toxic gas transmitter based on digital output - Google Patents
A kind of toxic gas transmitter based on digital output Download PDFInfo
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- CN207937423U CN207937423U CN201820177336.9U CN201820177336U CN207937423U CN 207937423 U CN207937423 U CN 207937423U CN 201820177336 U CN201820177336 U CN 201820177336U CN 207937423 U CN207937423 U CN 207937423U
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Abstract
The utility model is related to gas detection technology field, more particularly to a kind of toxic gas transmitter based on digital output.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 A/D converter circuit, the signal input part of A/D converter circuit is connected with the signal output end of sensor signal amplifying circuit, the signal input part of sensor signal amplifying circuit is separately connected the signal output end of signal acquisition circuit and the power output end of the second power supply circuit, the signal output end of the single chip machine controlling circuit is connected with the signal input part of RS485 interface circuits respectively.The utility model can carry out Site Detection to faint toxic gas, the information warning of the toxic gas detected can be shown and be alarmed, and the utility model reliability height, high sensitivity, of low cost.
Description
Technical field
The utility model is related to gas detection technology field, more particularly to a kind of toxic gas based on digital output becomes
Send device.
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 based on digital output of property.
Solve the problems, such as that techniques discussed above, the technical solution that the utility model is taken are：
A kind of toxic gas transmitter based on digital output includes single chip machine controlling circuit, the microcontroller control electricity
The signal input part on road is connected by relay circuit with the power output end of the first power supply circuit, single chip machine controlling circuit
Signal input part is connected with the signal output end of A/D converter circuit, and signal input part and the sensor of the A/D converter circuit are believed
The signal output end of number amplifying circuit is connected, and the signal input part of the sensor signal amplifying circuit is separately connected signal and adopts
The power output end of the signal output end of collector and the second power supply circuit, the signal output end of the single chip machine controlling circuit
It is connected respectively with the signal input part of RS485 interface circuits, DA conversion circuits, display circuit, warning circuit.
Preferably, the single chip machine controlling circuit includes control chip, the model STC90C58RD+ of the control chip
Chip, pin 24, the pin 25 of the STC90C58RD+ chips are connected with relay circuit, STC90C58RD+ chips
Pin 34, pin 35 are connected with A/D converter circuit, and the pins 31 of STC90C58RD+ chips, pin 32, pin 33 are and DA
Conversion circuit is connected, and pin 5, pin 9, the pin 7 of STC90C58RD+ chips are connected with RS485 interface circuits.
Preferably, the relay circuit includes identical first relay module of circuit structure and the second relay mould
Block, the base stage of first relay module including the first triode Q1, the first triode Q1 respectively with the 7th resistance R7
One end, the 8th resistance R8 one end be connected, the pin 24 of the other end and STC90C58RD+ chips of the 7th resistance R7
It is connected, the other end of the 8th resistance R8 is separately connected the emitter and power supply of the first triode Q1, and the described 1st
The base stage of pole pipe Q1 be separately connected one end of the 9th resistance R9, the tenth resistance R10 one end, the other end of the 9th resistance R9
The base stage of the second triode Q2 is connected, the other end of the tenth resistance R10 connects emitter and the ground connection of the second triode Q2,
The collector of the second triode Q2 is separately connected one end of the anode of the first diode D1, electromagnet, the one or two pole
The cathode of pipe D1, the other end of electromagnet are all connected with power supply, and first relay module further includes matched with electromagnet
Switch, the movable end of the switch is connected with an output end of the first power supply circuit, one of switch fixing end and
Another output end of first power supply circuit is connected.
Preferably, the RS485 interface circuits include MAX485 chips, the pin 1 of the MAX485 chips with
The pin 5 of STC90C58RD+ chips is connected, the pins 2,3 of MAX485 chips with 9 phase of the pin of STC90C58RD+ chips
Connection, the pin 4 of MAX485 chips are connected with the pin 7 of STC90C58RD+ chips；The pin 6 of MAX485 chips connects respectively
Connect one end of the 31st resistance R31, one end of the 33rd resistance R33, the 4th zener diode D4 cathode and network
Equipment, the other end of the 31st resistance R31 be separately connected one end of the 16th capacitance C16, MAX485 chips pin 8
And power supply, the other end ground connection of the 16th capacitance C16, the other end of the 33rd resistance R33 are separately connected
The pin 7 of MAX485 chips, one end of the 32nd resistance R32, third zener diode D3 cathode and the network equipment, institute
It states the pin 5 of the other end connection MAX485 chips of the 32nd resistance R32 and is grounded, the third zener diode D3 is just
Pole connects the anode of the 4th zener diode D4 and ground connection.
Preferably, the A/D converter circuit includes AD conversion chip, the model ADS1112 cores of the AD conversion chip
Piece, pin 7, the pin 8 of the ADS1112 chips are separately connected the pin 35 of STC90C58RD+ chips, pin 34.
Further, the DA conversion circuits include DA conversion chips, the model DAC7512 cores of the DA conversion chips
Piece, pin 4, pin 5, the pin 6 of the DAC7512 chips be separately connected the pin 33 of STC90C58RD+ chips, pin 32,
Pin 31.
Further, this toxic gas transmitter further includes external equipment, the signal output end of the DA conversion circuits with
External equipment is connected.
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, sensor signal amplifying circuit, RS485
Interface circuit, A/D converter circuit, DA conversion circuits, display circuit, warning circuit, the utility model can have poison gas to faint
Body carries out Site Detection, and the information warning of the toxic gas detected can be shown and be alarmed, and this practicality
Novel reliability height, high sensitivity, of low cost, stability is good, can be transmitted to digital signal by external network system
Alarm is played the role of in the external world.
(2), the single chip machine controlling circuit includes control chip, the model STC90C58RD+ cores of the control chip
Piece, STC90C58RD+ chip processing signal speeds are fast, at low cost, STC90C58RD+ chips and its peripheral circuit, that is, AD conversion
Circuit, DA conversion circuits, sensor signal amplifying circuit, the structure of RS485 interface circuits are simple, are easy to build.
(3), the signal output end of the DA conversion circuits is connected with external equipment, the toxic gas that can will be detected
Information warning user is notified by way of short message, play 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 sensor signal amplifying circuit of the utility model；
Fig. 5 is the schematic diagram of the RS485 interface circuits of the utility model；
Fig. 6 is the schematic diagram of the A/D converter circuit of the utility model；
Fig. 7 is the schematic diagram of the DA conversion 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-A/D converter circuit 80-DA conversion circuits
90-the first the 100-the second power supply circuit of power supply circuit
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 toxic gas transmitter based on digital output includes single chip machine controlling circuit 10, it is described
The signal input part of single chip machine controlling circuit 10 is connected by relay circuit 20 with the power output end of the first power supply circuit 90
It connects, the signal input part of single chip machine controlling circuit 10 is connected with the signal output end of A/D converter circuit 70, the AD conversion electricity
The signal input part on road 70 is connected with the signal output end of sensor signal amplifying circuit 30, the sensor signal amplification electricity
The signal input part on road 30 is separately connected the power supply output of the signal output end and the second power supply circuit 100 of signal acquisition circuit
The signal output end at end, the single chip machine controlling circuit 10 is electric with RS485 interface circuits 40, DA conversion circuits 80, display respectively
Road 50, warning circuit 60 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 transducer signal amplification circuit 30 is sent to be amplified.
The information warning of the toxic gas detected is transmitted to user mobile phone by the DA conversion circuits 80.
As shown in Fig. 2, the single chip machine controlling circuit 10 includes control chip, the model of the control chip
STC90C58RD+ chips, pin 24, the pin 25 of the STC90C58RD+ chips are connected with relay circuit 20,
Pin 34, the pin 35 of STC90C58RD+ chips are connected with A/D converter circuit 70, the pin 31 of STC90C58RD+ chips,
Pin 32, pin 33 are connected with DA conversion circuits 80, the pins 5 of STC90C58RD+ chips, pin 9, pin 7 with
RS485 interface circuits 40 are connected.
As shown in figure 3, the relay circuit 20 includes identical first relay module of circuit structure and the second relay
Device module, first relay module include that the base stage of the first triode Q1, the first triode Q1 is electric with the 7th respectively
One end of one end, the 8th resistance R8 for hindering R7 is connected, the 7th other end of resistance R7 and drawing for STC90C58RD+ chips
Foot 24 is connected, and the other end of the 8th resistance R8 is separately connected the emitter and power supply of the first triode Q1, and described
The base stage of one triode Q1 be separately connected one end of the 9th resistance R9, the tenth resistance R10 one end, the 9th resistance R9's is another
One end connects the base stage of the second triode Q2, and the other end of the tenth resistance R10 connects the emitter of the second triode Q2 simultaneously
Ground connection, the collector of the second triode Q2 are separately connected one end of the anode of the first diode D1, electromagnet, and described first
The cathode of diode D1, the other end of electromagnet are all connected with power supply, and first relay module further includes matching with electromagnet
The switch of conjunction, the movable end of the switch are connected with an output end of the first power supply circuit 90, and one of switch is solid
Fixed end is connected with another output end of the first power supply circuit 90.
As shown in figure 4, the sensor signal amplifying circuit 30 amplifies including two-stage signal, include that 3 signals amplify altogether
Device, when the resistance value of the 18th resistance R18 is equal to the resistance value of the 19th resistance R19, sensor signal amplifying circuit 30 is put
Big multiple is the resistance value of 22 resistance R22, when the resistance value of the 20th resistance R20 is equal to the electricity of 22 resistance R22
Resistance value, the multiple that sensor signal amplifying circuit 30 amplifies are the resistance value of the 18th resistance R18.
As shown in figure 5, the RS485 interface circuits 40 include MAX485 chips, the pin 1 of the MAX485 chips with
The pin 5 of STC90C58RD+ chips is connected, the pins 2,3 of MAX485 chips with 9 phase of the pin of STC90C58RD+ chips
Connection, the pin 4 of MAX485 chips are connected with the pin 7 of STC90C58RD+ chips；The pin 6 of MAX485 chips connects respectively
Connect one end of the 31st resistance R31, one end of the 33rd resistance R33, the 4th zener diode D4 cathode and network
Equipment, the other end of the 31st resistance R31 be separately connected one end of the 16th capacitance C16, MAX485 chips pin 8
And power supply, the other end ground connection of the 16th capacitance C16, the other end of the 33rd resistance R33 are separately connected
The pin 7 of MAX485 chips, one end of the 32nd resistance R32, third zener diode D3 cathode and the network equipment, institute
It states the pin 5 of the other end connection MAX485 chips of the 32nd resistance R32 and is grounded, the third zener diode D3 is just
Pole connects the anode of the 4th zener diode D4 and ground connection.
B- pins, the A+ pins of the RS485 interface circuits 40 are connected with the network equipment.
As shown in fig. 6, the A/D converter circuit 70 includes AD conversion chip, the model of the AD conversion chip
ADS1112 chips, pin 7, the pin 8 of the ADS1112 chips are separately connected pin 35, the pin of STC90C58RD+ chips
34。
Pin 1, the pin 4 of ADS1112 chips are connected with sensor signal amplifying circuit 30 respectively, and pin 1 is for connecing
The concentration signal of getter body, pin 4 are used to receive the current signal of gas.
As shown in fig. 7, the DA conversion circuits 80 include DA conversion chips, the model of the DA conversion chips
DAC7512 chips, pin 4, pin 5, the pin 6 of the DAC7512 chips are separately connected the pin of STC90C58RD+ chips
33, pin 32, pin 31.
The DA conversion circuits 80 are for exporting 0~5V voltage signals.
Second power supply circuit 100 includes MC34063 chips, for providing 2.6V power supplys.
First power supply circuit 90 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, after the signal input part access power supply of the relay circuit 20, switch connection, microcontroller control
Circuit 10 powers on, this toxic gas transmitter is started to work, the toxic gas in the real-time collection of coal mine of signal acquisition circuit,
And toxic gas signal is subjected to signal amplification by sensor signal amplifying circuit 30, sensor signal amplifying circuit 30 will be put
Signal after big is sent to ADS1112 chips, and the pin 1 of ADS1112 chips receives the concentration signal of gas, and pin 4 receives gas
The current signal of body, and the input terminal that digital signal is sent to single chip machine controlling circuit 10 is converted analog signals into, the list
Piece machine control circuit 10 judges whether digital signal is more than internal pre-set threshold value, if it exceeds the threshold, then controlling liquid crystal
Display screen shows gas information, controls flashing light or buzzer warning, is more than threshold value to remind underground operators current gas,
Meanwhile controlling RS485 interface circuits 40 and digital signal is transmitted to the external world by external network system, control DA can also be turned
It changes circuit 80 and the information warning of the toxic gas detected is transmitted to user mobile phone.
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, and the utility model reliability height, high sensitivity, it is of low cost,
Stability is good.
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 toxic gas transmitter based on digital output, it is characterised in that：Including single chip machine controlling circuit (10), institute
The signal input part for stating single chip machine controlling circuit (10) is defeated by relay circuit (20) and the power supply of the first power supply circuit (90)
Outlet is connected, and the signal input part of single chip machine controlling circuit (10) is connected with the signal output end of A/D converter circuit (70),
The signal input part of the A/D converter circuit (70) is connected with the signal output end of sensor signal amplifying circuit (30), described
The signal input part of sensor signal amplifying circuit (30) is separately connected signal output end and the second confession of signal acquisition circuit
The power output end of circuit (100), the signal output end of the single chip machine controlling circuit (10) respectively with RS485 interface circuits
(40), DA conversion circuits (80), display circuit (50), warning circuit (60) signal input part be connected.
2. a kind of toxic gas transmitter based on digital output as described in claim 1, it is characterised in that：The monolithic
Machine control circuit (10) includes control chip, the model STC90C58RD+ chips of the control chip, the STC90C58RD
Pin 24, the pin 25 of+chip are connected with relay circuit (20), and pin 34, the pin 35 of STC90C58RD+ chips are equal
Be connected with A/D converter circuit (70), the pins 31 of STC90C58RD+ chips, pin 32, pin 33 with DA conversion circuits
(80) it is connected, pin 5, pin 9, the pin 7 of STC90C58RD+ chips are connected with RS485 interface circuits (40).
3. a kind of toxic gas transmitter based on digital output as claimed in claim 2, it is characterised in that：The relay
Device circuit (20) includes identical first relay module of circuit structure and the second relay module, first relay module
Base stage including the first triode Q1, the first triode Q1 respectively with one end of the 7th resistance R7, the 8th resistance R8 one
End is connected, and the other end of the 7th resistance R7 is connected with the pin 24 of STC90C58RD+ chips, the 8th resistance R8
The other end be separately connected the emitter and power supply of the first triode Q1, the base stage of the first triode Q1 is separately connected
One end of nine resistance R9, one end of the tenth resistance R10, the other end of the 9th resistance R9 connect the base of the second triode Q2
The other end of pole, the tenth resistance R10 connects emitter and the ground connection of the second triode Q2, the collection of the second triode Q2
Electrode is separately connected one end of the anode of the first diode D1, electromagnet, the cathode of the first diode D1, electromagnet it is another
One end is all connected with power supply, and first relay module 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 (90), one of switch fixing end and the first power supply circuit (90)
Another output end is connected.
4. a kind of toxic gas transmitter based on digital output as claimed in claim 3, it is characterised in that：It is described
RS485 interface circuits (40) include MAX485 chips, the pin 1 of the MAX485 chips and the pin 5 of STC90C58RD+ chips
It is connected, the pin 2,3 of MAX485 chips is connected with the pin of STC90C58RD+ chips 9, the pin 4 of MAX485 chips
It is connected with the pin 7 of STC90C58RD+ chips；The pin 6 of MAX485 chips is separately connected the one of the 31st resistance R31
End, one end of the 33rd resistance R33, the 4th zener diode D4 cathode and the network equipment, the 31st resistance
The other end of R31 be separately connected one end of the 16th capacitance C16, MAX485 chips pin 8 and power supply, it is described 16th electricity
Hold the other end ground connection of C16, the other end of the 33rd resistance R33 is separately connected the pin the 7, the 30th of MAX485 chips
One end of two resistance R32, the cathode and the network equipment of third zener diode D3, the 32nd resistance R32's is another
The pin 5 of end connection MAX485 chips is simultaneously grounded, the 4th zener diode D4 of anode connection of the third zener diode D3
Anode and ground connection.
5. a kind of toxic gas transmitter based on digital output as claimed in claim 4, it is characterised in that：The AD turns
It includes AD conversion chip to change circuit (70), the model ADS1112 chips of the AD conversion chip, the ADS1112 chips
Pin 7, pin 8 are separately connected the pin 35 of STC90C58RD+ chips, pin 34.
6. a kind of toxic gas transmitter based on digital output as claimed in claim 5, it is characterised in that：The DA turns
It includes DA conversion chips to change circuit (80), the model DAC7512 chips of the DA conversion chips, the DAC7512 chips
Pin 4, pin 5, pin 6 are separately connected the pin 33, pin 32, pin 31 of STC90C58RD+ chips.
7. a kind of toxic gas transmitter based on digital output as described in claim 1~6 any one, feature exist
In：This toxic gas transmitter further includes external equipment, the signal output end and external equipment phase of the DA conversion circuits (80)
Connection.
8. a kind of toxic gas transmitter based on digital output as claimed in claim 7, it is characterised in that：The outside
Equipment includes mobile phone or computer.
9. a kind of toxic gas transmitter based on digital output as claimed in claim 8, it is characterised in that：The display
Circuit (50) is liquid crystal display, and the warning circuit (60) is flashing light and/or buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177336.9U CN207937423U (en) | 2018-02-01 | 2018-02-01 | A kind of toxic gas transmitter based on digital output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177336.9U CN207937423U (en) | 2018-02-01 | 2018-02-01 | A kind of toxic gas transmitter based on digital output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207937423U true CN207937423U (en) | 2018-10-02 |
Family
ID=63650963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820177336.9U Active CN207937423U (en) | 2018-02-01 | 2018-02-01 | A kind of toxic gas transmitter based on digital output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207937423U (en) |
-
2018
- 2018-02-01 CN CN201820177336.9U patent/CN207937423U/en active Active
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