CN103308653B - Methane carbon monoxide measurement transmitter - Google Patents
Methane carbon monoxide measurement transmitter Download PDFInfo
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- CN103308653B CN103308653B CN201310208681.6A CN201310208681A CN103308653B CN 103308653 B CN103308653 B CN 103308653B CN 201310208681 A CN201310208681 A CN 201310208681A CN 103308653 B CN103308653 B CN 103308653B
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- carbon monoxide
- chip microcomputer
- methane carbon
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- driving circuit
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Abstract
The invention relates to a methane carbon monoxide measurement transmitter. The methane carbon monoxide measurement transmitter comprises a shell and a circuit board, wherein the shell is provided with a plurality of wiring terminals for outputting RS-232 digital signals; the circuit board is provided with a methane carbon monoxide sensor, a sensor exciting circuit, a single chip microcomputer, an alarming buzzer driving circuit and an indication lamp driving circuit; an output end of the methane carbon monoxide sensor is connected with an AD input end of the single chip microcomputer; the single chip microcomputer is provided with the sensor exciting circuit, the alarming buzzer driving circuit and the indication lamp driving circuit, which are connected with the single chip microcomputer; the sensor exciting circuit is further connected with the methane carbon monoxide sensor. According to the methane carbon monoxide measurement transmitter disclosed by the invention, the methane carbon monoxide sensor is used for realizing the measurement of methane and carbon monoxide and carrying out controlling and driving on the single chip microcomputer; a UART (Universal Asynchronous Receiver Transmitter) is used for programming and setting parameters of an EEPROM (Electrical Erasable Programmable Read Only Memory) in the single chip microcomputer, so as to realize the calibration of a sensor alarming output threshold value; the UART is used for outputting a measured AD value of the methane carbon monoxide sensor and a module can output a UART digital signal which is directly read by computer equipment.
Description
Technical field
What the present invention relates to is a kind of technical field of automation, and what be specifically related to is a kind of methane Carbon Monoxide Detection transmitter.
Background technology
Sensor is a kind of detecting element, also referred to as sensitive element, measured information can be experienced, and can will detect the information experienced, the information being for conversion into electric signal or other desired forms according to certain rules exports, to meet the requirements such as the transmission of information, process, storage, display, record and control, it is the primary link realizing automatically detecting and automatically controlling.
Directly cannot utilize because sensor itself produces signal, need some external circuits to carry out encouraging normal work, and by Chip Microcomputer A/D conversion (10bitADC) read sensor output signal, obtain current environment detected value.Along with further developing of industrial technology, the output signal for transmitter defines certain standard gradually, so that with secondary instrument interface, common are analog signal output, digital signal exports, numerical model analysis exports.
Analog equipment production technology more complicated, methane and carbon monoxide belong to dangerous dangerous source, and the analog equipment of complex manufacturing exists larger security risk to operating personnel.Methane Carbon Monoxide Detection transmitter is the reflection methane of environment and the product of carbonomonoxide concentration data, is usually used in environmental monitoring.
Along with China's growth in the living standard, the social theory that people-oriented, Environmental security is paid attention to day by day, methane, methane in living environment and carbonomonoxide concentration and life safety and life health closely bound up, it is monitored, embodies a kind of social responsibility and a kind of humanistic care.
Summary of the invention
For the deficiency that prior art exists, the present invention seeks to be to provide a kind of methane Carbon Monoxide Detection transmitter, it can export the digitized signal that directly can be read by computer equipment, i.e. RS-232 signal, and by the demarcation of RS-232 communication realization to product, alarm threshold value can be set.
To achieve these goals, the present invention realizes by the following technical solutions:
Methane Carbon Monoxide Detection transmitter, it circuit board comprising shell and arrange in the enclosure, it is characterized in that, described shell is provided with the connection terminal of a plurality of output RS-232 digital signal, described circuit board is provided with methane carbon monoxide transducer, sensor excitation circuit, single-chip microcomputer, alarm buzzer driving circuit and drive circuit of indicator, the output terminal of described methane carbon monoxide transducer connects the AD input end of single-chip microcomputer, described single-chip microcomputer is provided with the output pin of driving circuit, the output pin of described single-chip microcomputer connects connection terminal, described sensor excitation circuit, alarm buzzer driving circuit is all connected with single-chip microcomputer with drive circuit of indicator, described sensor excitation circuit is also connected with methane carbon monoxide transducer.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, described drive circuit of indicator comprises working station indicator driving circuit and alarm lamp driving circuit, and described working station indicator driving circuit is all connected with single-chip microcomputer with alarm lamp driving circuit.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, described circuit board is also provided with buzzer alarm circuit, and the output pin of described single-chip microcomputer is connected with buzzer alarm circuit by alarm buzzer driving circuit.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, described alarm buzzer driving circuit adopts NPN triode, and it is driven by NPN triode, provides larger drive current.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, what described methane carbon monoxide transducer adopted is SB-95-12 integral sensor.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, the output pin of described single-chip microcomputer connects connection terminal by UART output port.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, what described sensor drove exciting circuit to adopt is that pwm signal drives JFET pipe to be sensor power.
Above-mentioned methane Carbon Monoxide Detection transmitter, wherein, described outer casing bottom is provided with line outlet groove and wall hanging mounting hole.
The present invention adopts the measurement of methane carbon monoxide transducer realization to the methane revealed in air, carbon monoxide, this sensor needs pwm signal to drive by certain sequential, export methane concentration value and carbonomonoxide concentration value in specific sequential, then changed by Chip Microcomputer A/D; UART port exports the digitized signal that directly can be read by computer equipment, realizes, to the demarcation of product, arranging alarm threshold value, and its structure is simple, reasonable in design, be worth of widely use.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is shell mechanism schematic diagram of the present invention;
Fig. 2 is circuit link block figure of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
See Fig. 1 to Fig. 2, the present invention is to provide and a kind ofly can export the methane Carbon Monoxide Detection transmitter that directly can be read digitized signal by computer equipment, it circuit board 2 comprising shell 1 and be arranged in shell 1, the side of shell 1 is provided with a plurality of connection terminal 3, this connection terminal 3 is 4PIN2.54 connection terminal, and being fixed by welding on circuit board 2, it is inner that this circuit board 2 is arranged on housing 1 by nut; The bottom of the shell 1 of the present embodiment sets out wire casing 4 and wall hanging mounting hole 5, reaches hiding object, facilitates field wiring, make shell handsome in appearance, process meticulous, wall-hanging installation.
In the present embodiment, this circuit board 2 comprises methane carbon monoxide transducer 6, sensor drives exciting circuit 7, single-chip microcomputer 8, UART output port 9 and drive circuit of indicator.And drive circuit of indicator comprises drive circuit of indicator 11 and working station indicator driving circuit 12.What this methane carbon monoxide transducer 6 adopted is SB-95-12 integral sensor, the output terminal of this methane carbon monoxide transducer 6 connects the AD input end of single-chip microcomputer 8, this methane carbon monoxide transducer 6 power end connecting sensor drives exciting circuit 7, driver output port and the sensor of described single-chip microcomputer 8 drive exciting circuit 7 to be connected, the driver output port of this single-chip microcomputer 8 is connected with alarm buzzer driving circuit 10, the driver output port of described single-chip microcomputer 8 is connected with alarm lamp driving circuit 11, the driver output port of single-chip microcomputer 8 is connected with working station indicator driving circuit 12, the driver output port UART output port 9 of described single-chip microcomputer 8 is connected, described UART output port 9 is connected with lead-out terminal 13.
In addition, described circuit board is also provided with buzzer alarm circuit, the output pin of this single-chip microcomputer 8 is connected with buzzer alarm circuit by alarm buzzer driving circuit 10; Wherein, this alarm buzzer driving circuit 10 adopts NPN triode, and it is driven by NPN triode, provides larger drive current.What described sensor drove exciting circuit 7 to adopt is that pwm signal drives JFET pipe to be sensor power.
The present embodiment in use, is first sensor excitation, the pwm signal driving sensor exciting circuit 7 that single-chip microcomputer 8 provides the requirement of coincidence senser work schedule works, sensor drives exciting circuit 7 to drive methane carbon monoxide transducer 6 to work, methane carbon monoxide transducer 6 exports concentration value to single-chip microcomputer 8, single-chip microcomputer 8 exports concentration value by UART, and the alarm threshold value of EEPROM in the concentration value of reading and single-chip microcomputer 8 is compared, alarm buzzer driving circuit 10 is driven according to judged result, alarm lamp driving circuit 11 works, in the course of the work, single-chip microcomputer 8 drives working station indicator driving circuit 12 to carry out work.
Again, demarcation is produced; Read the concentration value of the methane carbon monoxide transducer 6 sent by single-chip microcomputer 8, according to standard alarm threshold concentration, by EEPROM in the sheet of the signal of reading write single-chip microcomputer 8, realize the demarcation to transmitter.
3rd, report to the police and export; By the concentration value that multilevel iudge reads, determine whether to send alerting signal.
4th, concentration value exports; Being carried the output function of UART port by single-chip microcomputer 8, the concentration value read is exported, for preventing misreading, sending attribute byte to distinguish methane and carbonomonoxide concentration value simultaneously.
The detailed process of the present embodiment is: by methane carbon monoxide transducer 6 place in circuit, produce the sensor excitation circuit 7 needed with methane one oxidation sensors 6, methane one oxidation sensors 6, the AD conversion of single-chip microcomputer 8, obtain the methane carbonomonoxide concentration value of current environment, and export the digitized signal that directly can be read by computer equipment.
The present invention can also judge concentration value, and the preset alarm threshold value stored with single-chip microcomputer 6 interior EEPROM, provides alerting signal, and its structure is simple, reasonable in design, be worth of widely use.
Based on above-mentioned, the present invention adopts methane carbon monoxide transducer to realize carrying out control driving to the measurement of methane and carbon monoxide by single-chip microcomputer, programming setup parameter can be carried out to EEPROM in single-chip microcomputer by UART (RS-232), realize exporting threshold calibration to sensor alarm, export methane carbon monoxide transducer by UART (RS-232) and measure AD value, module can export the UART digitized signal that directly can be read by computer equipment.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; under the prerequisite not departing from invention spirit and scope; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. methane Carbon Monoxide Detection transmitter, it circuit board comprising shell and arrange in the enclosure, it is characterized in that, described shell is provided with the connection terminal of a plurality of output RS-232 digital signal, described circuit board is provided with methane carbon monoxide transducer, sensor excitation circuit, single-chip microcomputer, alarm buzzer driving circuit and drive circuit of indicator, the output terminal of described methane carbon monoxide transducer connects the AD input end of single-chip microcomputer, described single-chip microcomputer is provided with the output pin of driving circuit, the output pin of described single-chip microcomputer connects connection terminal, described sensor excitation circuit, alarm buzzer driving circuit is all connected with single-chip microcomputer with drive circuit of indicator, described sensor excitation circuit is also connected with methane carbon monoxide transducer.
2. methane Carbon Monoxide Detection transmitter according to claim 1, it is characterized in that, described drive circuit of indicator comprises working station indicator driving circuit and alarm lamp driving circuit, and described working station indicator driving circuit is all connected with single-chip microcomputer with alarm lamp driving circuit.
3. methane Carbon Monoxide Detection transmitter according to claim 1 and 2, is characterized in that, described circuit board is also provided with buzzer alarm circuit, and the output pin of described single-chip microcomputer is connected with buzzer alarm circuit by alarm buzzer driving circuit.
4. methane Carbon Monoxide Detection transmitter according to claim 3, is characterized in that, described alarm buzzer driving circuit adopts NPN triode.
5. methane Carbon Monoxide Detection transmitter according to claim 1, is characterized in that, what described methane carbon monoxide transducer adopted is SB-95-12 integral sensor.
6. methane Carbon Monoxide Detection transmitter according to claim 1, is characterized in that, the output pin of described single-chip microcomputer connects connection terminal by UART output port.
7. methane Carbon Monoxide Detection transmitter according to claim 1, is characterized in that, described outer casing bottom is provided with line outlet groove and wall hanging mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310208681.6A CN103308653B (en) | 2013-05-30 | 2013-05-30 | Methane carbon monoxide measurement transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310208681.6A CN103308653B (en) | 2013-05-30 | 2013-05-30 | Methane carbon monoxide measurement transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103308653A CN103308653A (en) | 2013-09-18 |
| CN103308653B true CN103308653B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310208681.6A Expired - Fee Related CN103308653B (en) | 2013-05-30 | 2013-05-30 | Methane carbon monoxide measurement transmitter |
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| Country | Link |
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| CN (1) | CN103308653B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090391A (en) * | 1993-12-11 | 1994-08-03 | 陈佛水 | Carbon monodixe conversion process steam ratio measuring controller technology |
| US6030828A (en) * | 1995-11-22 | 2000-02-29 | Unisense Aps. | Microsensor and use of such microsensor |
| CN203365403U (en) * | 2013-05-30 | 2013-12-25 | 苏州中崟传感股份有限公司 | Methane and carbon monoxide measuring transducer |
-
2013
- 2013-05-30 CN CN201310208681.6A patent/CN103308653B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090391A (en) * | 1993-12-11 | 1994-08-03 | 陈佛水 | Carbon monodixe conversion process steam ratio measuring controller technology |
| US6030828A (en) * | 1995-11-22 | 2000-02-29 | Unisense Aps. | Microsensor and use of such microsensor |
| CN203365403U (en) * | 2013-05-30 | 2013-12-25 | 苏州中崟传感股份有限公司 | Methane and carbon monoxide measuring transducer |
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| Publication number | Publication date |
|---|---|
| CN103308653A (en) | 2013-09-18 |
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