CN209055519U - A kind of gas detector output signal separated time bus universal circuit - Google Patents
A kind of gas detector output signal separated time bus universal circuit Download PDFInfo
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- CN209055519U CN209055519U CN201820744406.4U CN201820744406U CN209055519U CN 209055519 U CN209055519 U CN 209055519U CN 201820744406 U CN201820744406 U CN 201820744406U CN 209055519 U CN209055519 U CN 209055519U
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Abstract
A kind of gas detector output signal separated time bus universal circuit, including power IC, single-chip microcontroller management circuit, RS485 signal circuit, control signal circuit, the power IC is used for ﹢ 5V voltage output to other electronic components, the single-chip microcontroller management circuit receives the electric signal of gas sensor output, by gained Electric signal processing, on the one hand sensor signal that treated passes through control signal circuit and is output on controller, be on the other hand output in other terminals by RS485 signal circuit；Using in the gas alarm of the utility model, the collected signal of gas detector can either be transmitted to controller and can be communicated again with other terminals.
Description
Technical field
The utility model relates to instrument field more particularly to a kind of gas detector output signal separated time bus are general
Circuit.
Background technique
Gas detector signal is directly sent to Gas controller and carries out analyzing and determining whether have gas on-site exceeded in real time, with
The development of science and technology, be no longer that gas detector connects a controller, it is conditional at present also to require connect to
Other terminals (database, mobile phone etc.), if encountering the electric current of terminal acquisition, the RS485 signal of another terminal acquisition
Customer requirement cannot be met.
Summary of the invention
To solve the above problems, the utility model provides a kind of gas detector output signal separated time bus universal circuit,
It can export 4-20mA current signal and RS485 signal simultaneously.
The technical scheme adopted by the utility model is a kind of gas detector output signal separated time bus universal circuit,
Including power IC, single-chip microcontroller management circuit, RS485 signal circuit, control signal circuit, the power supply collection
It is used for ﹢ 5V voltage output at circuit to other electronic components, the single-chip microcontroller management circuit receives gas sensor output
Electric signal, by gained Electric signal processing, sensor signal that treated on the one hand pass through control signal circuit be output to
On controller, on the other hand it is output in other terminals by RS485 signal circuit.
As the further preferred of the utility model, the power IC includes 7805 circuit of three-terminal voltage-stabilizing integrated
U1, power interface J1, polar capacitor E1, capacitor C1, the 1st foot of the U1 connect the 2nd foot of power interface J1, the power interface
The 1st foot of J1 is grounded, the 2nd foot ground connection of U1, and the 3rd foot of U1 exports ﹢ 5V voltage, and the anode of the polar capacitor E1 connects the of U1
3 feet, cathode ground connection, the 3rd foot of a termination U1 of capacitor C1, other end ground connection, the external ﹢ 24V voltage of power interface J1.
As the further preferred of the utility model, the single-chip microcontroller management circuit includes single-chip microcontroller, crystal oscillator Y1, capacitor
C2, capacitor C3, capacitor C4, capacitor C5, resistance R1, the single-chip microcontroller model ATMEGA8, the 4th foot of single-chip microcontroller and the 6th foot are external
Same power supply VCC, one end of capacitor C2 connect the node of single-chip microcontroller the 4th, 6 feet, other end ground connection, and capacitor C3 is connected in parallel on capacitor C2 two
End, the 7th foot of single-chip microcontroller are connect by crystal oscillator Y1 with the 8th foot, single-chip microcontroller the 3rd, 5 feet ground connection, the external ﹢ 5V power supply of 18 foot of single-chip microcontroller,
And the 18th foot also pass through capacitor C5 and be grounded, the 20th foot of single-chip microcontroller is grounded by capacitor C4, the 21st foot of single-chip microcontroller ground connection, single-chip microcontroller the
29 feet pass through the external ﹢ 5V power supply of resistance R1.
As the further preferred of the utility model, the RS485 signal circuit includes that RS485 signal processing is integrated
Block U4, capacitor C6, polar capacitor E3, RS485 communication interface J3, the RS485 signal processing integrated package U4 model
MAX3072, the 1st foot of the U4 connect the 30th foot of single-chip microcontroller U2, U4 the 2nd, 3 feet connect the 32nd foot of single-chip microcontroller U2, U4's
4th foot connects the 31st foot of single-chip microcontroller U2, the 5th foot ground connection of U4, and the 6th foot of U4 connects the 2nd foot of J3, and the 7th foot of U4 connects the 1st of J3
Foot, the external ﹢ 5V power supply of the 8th foot of U4, capacitor C6 mono- terminate the 8th foot of U4, other end ground connection, and the anode of polar capacitor E3 meets U4
The 8th foot, cathode ground connection.
As the further preferred of the utility model, the control signal circuit includes resistance R2-R10, capacitor
C7-C8, polar capacitor E2, operational amplifier U3A and U3B, triode Q1 and Q2, diode D1-D3, signaling interface J2, it is described
The in-phase end of a termination operational amplifier U3B of R4, one end of resistance R2 connect the 15th foot of single-chip microcontroller after resistance R2, R3, R4 series connection,
The other end is grounded between terminating resistor a R2 and R3 of capacitor C8, between terminating resistor a R3 and R4 of capacitor C9, another termination
The reverse side on ground, operational amplifier U3B is grounded by resistance R7, one end of the output terminating resistor R5 of operational amplifier, resistance
The collector of the base stage of another termination triode Q2 of R5, triode Q2 is connect by resistance R6 with ﹢ 24V power supply, triode
The emitter of Q2 is grounded by resistance R7, and the in-phase end of operational amplifier U3A connects the collector of triode Q2, operational amplifier
The emitter of the reverse phase termination triode Q1 of U3A, the 4th foot ground connection of operational amplifier U3A, the cathode of polar capacitor E2 connect operation
The 4th foot of amplifier U3A, the anode of polar capacitor E2 connect ﹢ 24V power supply, and the 8th foot of operational amplifier U3A connects ﹢ 24V power supply, electricity
Hold the 8th foot of a termination operational amplifier U3A of C7, the output end of other end ground connection, operational amplifier U3A passes through resistance R8
The base stage of triode Q1 is connect, the emitter of triode Q1 connects ﹢ 24V power supply by resistance R9, and the collector of triode Q1 passes through electricity
R10 ground connection is hindered, the diode D2 is connected in parallel on the both ends resistance R10, and the anode of diode D1 connects the collector of triode Q1, cathode
One end of triode D3, the other end ground connection of triode D3 are connect, signaling interface J2 is connected in parallel on the both ends diode D3.
The utility model has the beneficial effects that gas detector is collected using in the gas alarm of the utility model
Signal can either be transmitted to controller and can be communicated again with other terminals.
Detailed description of the invention
Fig. 1 is power IC schematic diagram；
Fig. 2 is single chip circuit schematic diagram；
Fig. 3 is RS485 signal circuit schematic diagram；
Fig. 4 is control signal circuit schematic diagram.
Specific embodiment
The utility model is further described below in conjunction with Figure of description and specific preferred embodiment, but not because
This and limit the protection scope of the utility model.
As shown in Figs 1-4, a kind of gas detector output signal separated time bus universal circuit of the present embodiment, including power supply
Integrated circuit, single-chip microcontroller management circuit, RS485 signal circuit, control signal circuit, the power IC are used
In giving ﹢ 5V voltage output to other electronic components, the single-chip microcontroller management circuit receives the electric signal of gas sensor output,
By gained Electric signal processing, on the one hand sensor signal that treated passes through control signal circuit and is output on controller,
On the other hand it is output in other terminals by RS485 signal circuit.
As shown in Figure 1, power IC includes 7805 circuit of three-terminal voltage-stabilizing integrated U1, power interface J1, polar capacitor
E1, capacitor C1, the 1st foot of the U1 connect the 2nd foot of power interface J1, and the 1st foot of the power interface J1 is grounded, and the 2nd of U1 the
Foot ground connection, the 3rd foot of U1 export ﹢ 5V voltage, and the anode of the polar capacitor E1 connects the 3rd foot of U1, and cathode is grounded, capacitor C1's
The 3rd foot of one termination U1, other end ground connection, the external ﹢ 24V voltage of power interface J1.
As shown in Fig. 2, single-chip microcontroller management circuit includes single-chip microcontroller, crystal oscillator Y1, capacitor C2, capacitor C3, capacitor C4, capacitor
C5, resistance R1, the single-chip microcontroller model ATMEGA8, the 4th foot of single-chip microcontroller and the external same power supply VCC of the 6th foot, capacitor C2's
One end connects the node of single-chip microcontroller the 4th, 6 feet, other end ground connection, and capacitor C3 is connected in parallel on the both ends capacitor C2, and the 7th foot of single-chip microcontroller passes through crystalline substance
Vibration Y1 is connect with the 8th foot, single-chip microcontroller the 3rd, 5 feet ground connection, the external ﹢ 5V power supply of 18 foot of single-chip microcontroller, and the 18th foot also passes through capacitor C5
Ground connection, the 20th foot of single-chip microcontroller are grounded by capacitor C4, and the 21st foot of single-chip microcontroller ground connection, the 29th foot of single-chip microcontroller passes through the external ﹢ of resistance R1
5V power supply.
As shown in figure 3, RS485 signal circuit includes RS485 signal processing integrated package U4, capacitor C6, polar capacitor
E3, RS485 communication interface J3, the 1st foot order piece of RS485 signal processing integrated package U4 the model MAX3072, the U4
The 30th foot of machine U2, U4 the 2nd, 3 feet connect the 32nd foot of single-chip microcontroller U2, the 4th foot of U4 connects the 31st foot of single-chip microcontroller U2, U4's
5th foot ground connection, the 6th foot of U4 connect the 2nd foot of J3, and the 7th foot of U4 connects the 1st foot of J3, the external ﹢ 5V power supply of the 8th foot of U4, capacitor
C6 mono- terminates the 8th foot of U4, other end ground connection, and the anode of polar capacitor E3 connects the 8th foot of U4, cathode ground connection.
As shown in figure 4, control signal circuit includes resistance R2-R10, capacitor C7-C8, polar capacitor E2, operation put
Big device U3A and U3B, triode Q1 and Q2, diode D1-D3, signaling interface J2, R4 after resistance R2, R3, R4 series connection
The in-phase end of one termination operational amplifier U3B, one end of resistance R2 connect the 15th foot of single-chip microcontroller, a terminating resistor R2 of capacitor C8 and
The other end is grounded between R3, between terminating resistor a R3 and R4 of capacitor C9, other end ground connection, and the reverse phase of operational amplifier U3B
End is grounded by resistance R7, one end of the output terminating resistor R5 of operational amplifier, another termination triode Q2's of resistance R5
The collector of base stage, triode Q2 is connect by resistance R6 with ﹢ 24V power supply, and the emitter of triode Q2 is connect by resistance R7
Ground, the in-phase end of operational amplifier U3A connect the collector of triode Q2, the reverse phase termination triode Q1's of operational amplifier U3A
Emitter, the 4th foot ground connection of operational amplifier U3A, the cathode of polar capacitor E2 connect the 4th foot of operational amplifier U3A, polarity electricity
The anode for holding E2 connects ﹢ 24V power supply, and the 8th foot of operational amplifier U3A connects ﹢ 24V power supply, a termination operational amplifier of capacitor C7
The 8th foot of U3A, another ground connection, the output end of operational amplifier U3A connect the base stage of triode Q1, triode by resistance R8
The emitter of Q1 connects ﹢ 24V power supply by resistance R9, and the collector of triode Q1 is grounded by resistance R10, and the diode D2 is simultaneously
The end both ends resistance R10 are associated in, the anode of diode D1 connects the collector of triode Q1, and cathode connects one end of triode D3, three poles
The other end of pipe D3 is grounded, and signaling interface J2 is connected in parallel on the both ends diode D3.
The working principle of the utility model is as follows:
(1) single-chip microcontroller U2 carries out analog signal by the electric signal ADC_IN exported to gas sensor and is converted to digital letter
Number and convert become corresponding gas concentration Value Data；
(2) collected concentration data is sent to RS485 and PWM port by single-chip microcontroller U2 simultaneously；
(3) RS485 is directly and other terminals carry out data communication；
(4) PWM, R2, C8, R3 and C9 of U2 collectively constitutes digital signal and is converted to analog voltage signal 0.4-2.0V, warp
It crosses U4, Q1, Q2 and R9 and voltage signal is converted into corresponding current signal 4-20mA output.
As described above, although the utility model has been indicated and described referring to specific preferred embodiment, it must not
It is construed to the limitation to the utility model itself, in the spirit and scope for not departing from the utility model that appended claims define
Under the premise of, it can various changes can be made in the form and details to it.
Claims (5)
1. a kind of gas detector output signal separated time bus universal circuit, which is characterized in that including power IC, monolithic
Machine manages circuit, RS485 signal circuit, control signal circuit, and the power IC is single-chip microcontroller management electricity
Road, RS485 signal circuit and control signal circuit provide ﹢ 5V power supply, and the single-chip microcontroller management circuit receives gas
The electric signal of body sensor output, by gained Electric signal processing, on the one hand sensor signal that treated passes through control signal and passes
Transmission of electricity road is output on controller, is on the other hand output in exterior terminal equipment by RS485 signal circuit.
2. a kind of gas detector output signal separated time bus universal circuit according to claim 1, which is characterized in that institute
Stating power IC includes 7805 circuit of three-terminal voltage-stabilizing integrated U1, power interface J1, polar capacitor E1, capacitor C1, the U1
The 1st foot connect the 2nd foot of power interface J1, the 1st foot ground connection of the power interface J1, the 2nd foot ground connection of U1, the 3rd foot of U1
﹢ 5V voltage is exported, the anode of the polar capacitor E1 connects the 3rd foot of U1, and cathode is grounded, the 3rd foot of a termination U1 of capacitor C1,
Other end ground connection, the external ﹢ 24V voltage of power interface J1.
3. a kind of gas detector output signal separated time bus universal circuit according to claim 1, which is characterized in that institute
Stating single-chip microcontroller management circuit includes single-chip microcontroller, crystal oscillator Y1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistance R1, the monolithic
The model ATMEGA8 of machine, the 4th foot of single-chip microcontroller and the external same power supply VCC of the 6th foot, one end of capacitor C2 connect single-chip microcontroller the 4th, 6
The node of foot, other end ground connection, capacitor C3 are connected in parallel on the both ends capacitor C2, and the 7th foot of single-chip microcontroller is connect by crystal oscillator Y1 with the 8th foot,
Single-chip microcontroller the 3rd, 5 feet ground connection, the external ﹢ 5V power supply of 18 foot of single-chip microcontroller, and the 18th foot also passes through capacitor C5 and is grounded, the 20th foot of single-chip microcontroller
It is grounded by capacitor C4, the 21st foot of single-chip microcontroller ground connection, the 29th foot of single-chip microcontroller passes through the external ﹢ 5V power supply of resistance R1.
4. a kind of gas detector output signal separated time bus universal circuit according to claim 1, which is characterized in that institute
Stating RS485 signal circuit includes RS485 signal processing integrated package U4, capacitor C6, polar capacitor E3, RS485 communication interface
J3, the RS485 signal processing integrated package U4 model MAX3072, the 1st foot of the U4 meet the 30th foot of single-chip microcontroller U2, U4
The 2nd, 3 feet connect the 32nd foot of single-chip microcontroller U2, the 4th foot of U4 connects the 31st foot of single-chip microcontroller U2, the 5th foot ground connection of U4, U4's
6th foot connects the 2nd foot of J3, and the 7th foot of U4 connects the 1st foot of J3, the external ﹢ 5V power supply of the 8th foot of U4, and capacitor C6 mono- terminates the of U4
8 feet, other end ground connection, the anode of polar capacitor E3 connect the 8th foot of U4, cathode ground connection.
5. a kind of gas detector output signal separated time bus universal circuit according to claim 1, which is characterized in that institute
Stating control signal circuit includes resistance R2-R10, capacitor C7-C8, polar capacitor E2, operational amplifier U3A and U3B, three poles
Pipe Q1 and Q2, diode D1-D3, signaling interface J2, a termination operational amplifier U3B of R4 after resistance R2, R3, R4 series connection
In-phase end, one end of resistance R2 connects the 15th foot of single-chip microcontroller, and the other end is grounded between terminating resistor a R2 and R3 of capacitor C8, electricity
Between the terminating resistor R3 and R4 for holding C9, other end ground connection, the reverse side of operational amplifier U3B is grounded by resistance R7, is transported
Calculate one end of the output terminating resistor R5 of amplifier, the base stage of another termination triode Q2 of resistance R5, the current collection of triode Q2
Pole is connect by resistance R6 with ﹢ 24V power supply, and the emitter of triode Q2 is grounded by resistance R7, and operational amplifier U3A's is same
Mutually terminate the collector of triode Q2, the emitter of the reverse phase termination triode Q1 of operational amplifier U3A, operational amplifier U3A
The 4th foot ground connection, the cathode of polar capacitor E2 connects the 4th foot of operational amplifier U3A, and the anode of polar capacitor E2 connects ﹢ 24V electricity
Source, the 8th foot of operational amplifier U3A connect ﹢ 24V power supply, the 8th foot of a termination operational amplifier U3A of capacitor C7, another termination
Ground, the output end of operational amplifier U3A connect the base stage of triode Q1 by resistance R8, and the emitter of triode Q1 passes through resistance R9
﹢ 24V power supply is connect, the collector of triode Q1 is grounded by resistance R10, and the diode D2 is connected in parallel on the both ends resistance R10, two poles
The anode of pipe D1 connects the collector of triode Q1, and cathode connects one end of triode D3, the other end ground connection of triode D3, and signal connects
Mouth J2 is connected in parallel on the both ends diode D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820744406.4U CN209055519U (en) | 2018-05-18 | 2018-05-18 | A kind of gas detector output signal separated time bus universal circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820744406.4U CN209055519U (en) | 2018-05-18 | 2018-05-18 | A kind of gas detector output signal separated time bus universal circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209055519U true CN209055519U (en) | 2019-07-02 |
Family
ID=67046035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820744406.4U Expired - Fee Related CN209055519U (en) | 2018-05-18 | 2018-05-18 | A kind of gas detector output signal separated time bus universal circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209055519U (en) |
-
2018
- 2018-05-18 CN CN201820744406.4U patent/CN209055519U/en not_active Expired - Fee Related
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| 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: 20190702 Termination date: 20210518 |
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| CF01 | Termination of patent right due to non-payment of annual fee |