CN205749391U - A kind of toxic and harmful detector system - Google Patents
A kind of toxic and harmful detector system Download PDFInfo
- Publication number
- CN205749391U CN205749391U CN201620678468.0U CN201620678468U CN205749391U CN 205749391 U CN205749391 U CN 205749391U CN 201620678468 U CN201620678468 U CN 201620678468U CN 205749391 U CN205749391 U CN 205749391U
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- China
- Prior art keywords
- mcu processor
- chip
- circuit
- converter
- lmp91000
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- Arrangements For Transmission Of Measured Signals (AREA)
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Abstract
nullThe utility model discloses a kind of toxic and harmful detector system，MCU processor uses PIC18F65J90 single-chip microcomputer，MCU processor respectively with LCD display、Button、Remote controller、Reset circuit、Acoustic-optic alarm、Relay、Eeprom memory、Watchdog circuit、Power supply connects，LMP91000 chip is as analog front circuit，LMP91000 chip is connected with sensor，Sensor is connected with drive amplification circuit，Drive amplification circuit is connected with A/D converter，A/D converter is connected with MCU processor by I/O mouth，A/D converter uses AD421 chip，MCU processor is by serial ports and AMI5191 modem communication，HART communication module is connected with MCU processor by AMI5191 modem communication，This utility model simple in construction，Not only there is sound and light alarm，And the comprehensively monitoring of big section can be formed，The concentration levels of toxic and harmful of each monitoring point can be understood in real time at control room，Conveniently carry out integrated management.
Description
Technical field
This utility model relates to gas detector technical field, specifically one toxic and harmful detector system
System.
Background technology
The toxic and harmfuls such as sulfur dioxide producing, transport, use during be likely to occur leakage, and along with stone
Oiling industrial expansion, also can produce H in many production scenes2The toxic and harmfuls such as S, the expansion existed due to gas itself
Dissipating property, after leaking, under the effect of external wind and concentration inside gradient, gas can spread along ground surface, seriously endangers
The life security of the victimization people.Therefore, to H2Monitoring and the early warning of the toxic and harmfuls such as S are just particularly important.Present stage enters
The equipment of row early warning is divided into two big classes: portable instrument and detector, and generally only has sound and light alarm during concentration over-standard, only
It is that the personnel being in scene are had reminding effect, and does not forms the comprehensively monitoring of big section, it is impossible in production scene, Microcomputer
Measure and realize two-way, serial, the communication link of multinode digital communication between control equipment.
Therefore, a not only there is sound and light alarm for overcoming the deficiency of above-mentioned technology and designing, and sheet can be formed
The comprehensively monitoring in district, can understand the concentration levels of toxic and harmful of each monitoring point in real time, conveniently combine at control room
Close a kind of toxic and harmful detector system of management, inventor's problem to be solved just.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of toxic and harmful detector system,
Its simple in construction, not only has sound and light alarm, and can form the comprehensively monitoring of big section, can understand in real time respectively at control room
The concentration levels of the toxic and harmful of monitoring point, conveniently carries out integrated management.
This utility model solves its technical problem and be the technical scheme is that a kind of toxic and harmful detector system
System, it includes MCU processor, HART communication module, power supply, sensor, LMP91000 chip, the employing of described MCU processor
PIC18F65J90 single-chip microcomputer, described MCU processor respectively with LCD display, button, remote controller, reset circuit, sound and light alarm
Device, relay, eeprom memory, watchdog circuit, power supply connect, and described LMP91000 chip is as AFE (analog front end) electricity
Road, described LMP91000 chip is connected with sensor, and described sensor is connected with drive amplification circuit, described drive amplification circuit
Being connected with A/D converter, described A/D converter is connected with MCU processor by I/O mouth, and described A/D converter uses AD421
Chip, described MCU processor is by serial ports and AMI5191 modem communication, and described HART communication module passes through AMI5191
Modem communication is connected with MCU processor.
The beneficial effects of the utility model are:
1, this utility model can realize the most uninterrupted monitoring based on HART fieldbus toxic and harmful detector,
Sound and light alarm can not only be carried out when concentration over-standard, the personnel being in scene are reminded, and can be with the equipment such as controller
A sheet of region can be realized comprehensively monitoring together, signal access controller or PLC are formed the real time comprehensive in whole region
Monitoring, can complete all of configuration being installed on presence detector and management at control room by HART communication, understand in real time
The concentration levels of the toxic and harmful of each monitoring point, has superpower self diagnostic capability in addition, and security reliability is strong.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Fig. 2 is this utility model analog front circuit schematic diagram.
Fig. 3 is this utility model MCU CPU circuit theory diagrams.
Fig. 4 is this utility model HART communication and 4～20mA output circuit schematic diagrams.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is expanded on further, it should be appreciated that these embodiments are merely to illustrate this
Utility model rather than limit scope of the present utility model.In addition, it is to be understood that reading the content that this utility model is lectured
Afterwards, this utility model can be made various changes or modifications by those skilled in the art, and these equivalent form of values also fall within application
Appended claims limited range.
Seeing Fig. 1 is this utility model structural representation, this structure one toxic and harmful detector system, including
MCU processor, HART communication module, power supply, sensor, LMP91000 chip, MCU processor uses PIC18F65J90 monolithic
Machine, MCU processor is deposited with LCD display, button, remote controller, reset circuit, acoustic-optic alarm, relay, EEPROM respectively
Reservoir, watchdog circuit, power supply connect, and LMP91000 chip is as analog front circuit, and LMP91000 chip is with sensor even
Connecing, sensor is connected with drive amplification circuit, and drive amplification circuit is connected with A/D converter, A/D converter by I/O mouth with
MCU processor connects, and A/D converter uses AD421 chip, and MCU processor is led to AMI5191 modem by serial ports
Letter, HART communication module is connected with MCU processor by AMI5191 modem communication.
Seeing Fig. 2 is this utility model analog front circuit schematic diagram, and system uses LMP91000 as front-end processing
Core component, it can provide the complete signal path solution between sensor and microcontroller, and this scheme can generate
The output voltage proportional to battery current.
The programmability of LMP91000 enables it to be propped up by a single design relative with multiple discrete solutions
Holding multiple electrochemical sensor, such as, 3 wire toxic gas sensors and 2 wire galvanic cell type sensor LMP91000 support
Gas sensitivity in the range of 0.5nA/ppm to 9500nA/ppm it also can realize 5 μ A to 750 μ A full scale current ranges
The scalable battery bias of simple conversion LMP91000 and transimpedance amplifier (TIA) gain can be compiled by I2C interface
Journey I2C interface be can also be used for sensor diagnostic integrated temperature sensor and can be read by VOUT pin by user, and
Can be used for providing extra correction, or monitored temperature conditions LMP91000 with verificating sensor passed through and optimized,
Be applicable to Micro Energy Lose application, operating voltage range be 2. 7V to 5. 25V always flow consumption less than 10 μ A can by close TIA
Reference electrode is come the most energy-conservation with working electrode short circuit by amplifier and one internal switch of use.
Seeing Fig. 3 is this utility model MCU CPU circuit theory diagrams, uses 8 PIC of integrated LCD module
Single-chip microcomputer PIC18F65J90 is as MCU processor.PIC18F65J90 is used to complete the guarantor of the collection of signal, linearisation, parameter
Deposit, report to the police, show, communicate and the function such as electric current output.Serial EEPROM memory 24AA04 chip is used to realize parameter
Preserve and power down protection.
Seeing Fig. 4 is this utility model HART communication and 4～20mA output circuit schematic diagrams, uses AD421 chip to realize 4
～the output of 20mA electric current, AD421 chip is a complete loop service type 4～20mA digital to analog converter, and integrated precision is high, one-tenth
This is low.4mA zero level output electric current, and 20mA Full-span output electric current are provided.
AMI5191 is HART modem, uses the FSK half-duplex operation of Phase Continuation, and data transfer rate is
1200bps.AMI5191 has been internally integrated that to meet the manipulator of Bell202 standard, demodulator, receiving filter, transmission signal whole
The circuit such as shape circuit, carrier wave detection.The operating current 330 μ A when+3.3V powers.Due to these features of AMI5191, use relatively
Few external passive components just can build and meet HART protocol physical layer.
MCU processor is by serial ports and AMI5191 modem communication, and the HART communication in bus is solved by AMI5191
Mailing to MCU processor by serial ports after tune, the communications command that MCU processor is to be sent mails to AMI5191 also by serial ports, then
It is modulated into the HART communication signal being superimposed upon on 4～20mA current signals by AMI5191, completes HART communication with this.MCU process
Device operates AD421 digital to analog converter by I/O mouth, exports the 4～20mA signals corresponding with gas concentration.
The most uninterrupted monitoring can be realized, when concentration over-standard based on HART fieldbus toxic and harmful detector
Sound and light alarm can not only be carried out, the personnel being in scene are reminded, and can be to one together with the equipment such as controller
Bulk zone realizes comprehensively monitoring, and signal access controller or PLC are formed the Integrated Realtime Monitoring and Controlling in whole region, can be in control
Room processed completes all of configuration being installed on presence detector and management by HART communication, understands the poisonous of each monitoring point in real time
The concentration levels of harmful gas, has superpower self diagnostic capability in addition, and security reliability is strong.
Claims (1)
1. a toxic and harmful detector system, it is characterised in that: it includes MCU processor, HART communication module, electricity
Source, sensor, LMP91000 chip, described MCU processor use PIC18F65J90 single-chip microcomputer, described MCU processor respectively with
LCD display, button, remote controller, reset circuit, acoustic-optic alarm, relay, eeprom memory, watchdog circuit, electricity
Source connects, and described LMP91000 chip is as analog front circuit, and described LMP91000 chip is connected with sensor, described sensing
Device is connected with drive amplification circuit, and described drive amplification circuit is connected with A/D converter, described A/D converter by I/O mouth with
MCU processor connects, and described A/D converter uses AD421 chip, and described MCU processor is by serial ports and AMI5191 modulatedemodulate
Tune device communicates, and described HART communication module is connected with MCU processor by AMI5191 modem communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620678468.0U CN205749391U (en) | 2016-07-01 | 2016-07-01 | A kind of toxic and harmful detector system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620678468.0U CN205749391U (en) | 2016-07-01 | 2016-07-01 | A kind of toxic and harmful detector system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749391U true CN205749391U (en) | 2016-11-30 |
Family
ID=57379897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620678468.0U Expired - Fee Related CN205749391U (en) | 2016-07-01 | 2016-07-01 | A kind of toxic and harmful detector system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749391U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204100A (en) * | 2017-06-06 | 2017-09-26 | 榆林学院 | A kind of hydrogen sulfide warning system and method based on oil drilling platform |
| CN114199959A (en) * | 2021-11-30 | 2022-03-18 | 南通汇聚软件科技有限公司 | Gas quadrupole electrochemical conditioning circuit |
-
2016
- 2016-07-01 CN CN201620678468.0U patent/CN205749391U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204100A (en) * | 2017-06-06 | 2017-09-26 | 榆林学院 | A kind of hydrogen sulfide warning system and method based on oil drilling platform |
| CN114199959A (en) * | 2021-11-30 | 2022-03-18 | 南通汇聚软件科技有限公司 | Gas quadrupole electrochemical conditioning circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20190701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |