CN105717833B - Intelligent environment protection number adopts instrument mainboard and working method - Google Patents
Intelligent environment protection number adopts instrument mainboard and working method Download PDFInfo
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- CN105717833B CN105717833B CN201610056486.XA CN201610056486A CN105717833B CN 105717833 B CN105717833 B CN 105717833B CN 201610056486 A CN201610056486 A CN 201610056486A CN 105717833 B CN105717833 B CN 105717833B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24024—Safety, surveillance
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The invention discloses intelligent environment protection numbers to adopt instrument mainboard and working method, including core controller, the core controller is connected with A/D conversion interface circuit, liquid crystal display controller circuitry, usb circuit, Ethernet interface circuit, serial port circuit and real time clock circuit respectively, and the A/D conversion interface circuit is connected with analog input circuit；Analog input circuit, for inputting the analog quantity of acquisition and being transmitted to A/D conversion interface circuit, the analog quantity of upload is converted into digital quantity in A/D conversion interface circuit and is transmitted to core controller, core controller is exported data to display circuit by output circuit after further handling the data of upload.The present invention effectively can be counted and be shown to the various environmental index of peripheral apparatus acquisition, and provide a variety of input and output serial ports, can better adapt to different detection requirements.Meanwhile number provided by the invention adopts instrument mainboard and user can be facilitated to carry out secondary development, customizes different function as needed.
Description
Technical field
The present invention relates to digital collection fields, and in particular to a kind of intelligent environment protection number adopts instrument mainboard and working method.
Background technique
Environment protection data collector is the powerful professional environment protection data collector of a new generation, is suitable for environmental monitoring, pollution sources are supervised
Control etc., as the long-range of various optimized treatments in terms of environmental protection monitors and data acquisition, air quality monitoring, surface water
Water quality monitoring etc. and the environmental parameters monitoring side such as inside plants environmental monitoring, warehouse environment monitoring, the monitoring of distributed computer room
Face.
Current environment protection data collector the problem is that:
1. input/output interface is single, a variety of peripheral apparatus cannot be compatible with, to using certain limitation；
It 2. Products Compatibility is poor, cannot be adjusted with the type of field device, product type can only be replaced even again
Exploitation；
3. existing environment protection data collector needs to be transmitted to computer by transmission device in data transmission, do not having
It is inconvenient to use in the case where computer, and data may be subjected to corresponding interference in transmission process, influence transmission essence
Degree.
Summary of the invention
To solve the shortcomings of the prior art, the invention discloses intelligent environment protection numbers to adopt instrument mainboard and working method, this
The number that invention provides adopts instrument mainboard and facilitates carry out secondary development, is added according to user demand or modifies function, in the acquisition of data
Precision is higher.
To achieve the above object, concrete scheme of the invention is as follows:
Intelligent environment protection number adopts instrument mainboard, including core controller, and the core controller is electric with A/D translation interface respectively
Road, liquid crystal display controller circuitry, usb circuit, Ethernet interface circuit, serial port circuit and real time clock circuit are connected, described
A/D conversion interface circuit is connected with analog input circuit, and the core controller is also connected with digital input circuit；Digital quantity
Core controller is transmitted to through digital input circuit；
The analog input circuit, for inputting the analog quantity of acquisition and being transmitted to A/D conversion interface circuit, A/D conversion
The analog quantity of upload is converted into digital quantity in interface circuit and is transmitted to core controller, data of the core controller to upload
Data are exported by output circuit to display circuit after further processing.
Further, the intelligent environment protection number adopts instrument mainboard and is also connected with mobile communication module, mobile communication module and clothes
Business device is connected；
Further, the A/D conversion interface circuit includes dual operational amplifier, and the first of the dual operational amplifier is defeated
The negative pole end of outlet and first input end is connected and by resistance eutral grounding, the second output terminal of the dual operational amplifier and the
The negative pole end of two input terminals is connected and by resistance eutral grounding, the anode of the positive terminal of the first input end and the second input terminal
Two-way is divided equally at end, and all the way by resistance eutral grounding, another way is grounded by concatenated resistance and diode.
Further, the real time clock circuit includes real-time timepiece chip, and the vdd terminal of real-time timepiece chip divides three tunnels,
Power supply end is connected to by diode all the way, all the way by the diode, resistance and the battery ground that are connected in series, third road passes through
Capacitor and the polar capacitor ground connection being in parallel；The end the real-time timepiece chip SDA and the end SCL pass through corresponding resistance respectively
It is connected to power supply end and the end real-time timepiece chip SDA and the end SCL is connected with core controller respectively.
Further, the usb circuit includes USB_HOST circuit and USB_OTG circuit, USB_HOST circuit packet
Interface is included, two-way is divided at the end VBUS of the interface, connects power supply all the way, another way is by capacity earth, and the interface is just
Extreme and negative pole end is respectively divided into three tunnels, and all the way by resistance eutral grounding, by protection chip ground, third road road is connected to another way
Core controller.
Further, the USB_OTG circuit includes interface, and two-way is divided at the end ID of the interface, is protected all the way by ESD
Circuit ground, another way are connected to core controller, and the positive terminal and negative pole end of the interface divide equally two-way, a-road-through overprotection electricity
Road ground connection, another way are connected to core controller by resistance, and the end VBUS of the interface is connected to high level and enables chip, the height
The input terminal that level enables chip passes through the capacitor being in parallel and polar capacitor is connected to power supply, and the high level enables chip
Output terminals A pass through the capacitor that is in parallel and polar capacitor ground connection, the output end B that the high level enables chip divides two-way, one
Road is connected to feeder ear, is grounded all the way by polar capacitor, and the end ENA that the high level enables chip passes through resistance eutral grounding, described
The end ENB, the end FLGA and the end FLGB that high level enables chip pass through corresponding resistance respectively and are connected to power supply end, described
The end ENA, the end FLGA and the end ENB that high level enables chip are respectively connected to core controller.
Further, the Ethernet interface circuit includes RJ45 circuit and 100 m ethernet circuit, the 100 m ethernet
Circuit includes ethernet control chip, and ethernet control chip is connected with core controller, the RD anode of ethernet control chip
End and negative pole end, TD positive terminal and negative pole end are respectively connected to network transformer, and network transformer is connected to corresponding interface.
Further, the serial port circuit includes three road RS232 circuits and RS485 circuit, every road RS232 circuit are equal all the way
Including serial port chip, serial port chip port corresponding with core controller is connected, the end T1OUT of the serial port chip,
The end R1IN, the end T2OUT, the end R2IN pass through the resistance being connected in series and diode ground connection respectively.
Intelligent environment protection number adopts the working method of instrument mainboard, comprising:
Serial port data acquisition: core controller sends data to serial port circuit and acquires message, scene according to certain period
After equipment receives message, data message reply is carried out, core controller carries out protocol analysis to the data message received, takes out it
In useful data portion, complete serial port data acquisition operation；
Collection of simulant signal: the voltage of output or current signal are input to core control by live analog signalling in real time
The ADC chip of device processed, the analog-to-digital conversion register that core controller reads ADC chip in real time obtain corresponding data, and will most
The data that nearly setting time receives are filtered using median filtering algorithm, obtain final data；
Digital signal acquiring: live switching signal is connected to the GPIO input circuit of core controller, core controller
The high and low state of the level of real-time detection GPIO, obtains the switch state of field device；
Send in real time data: core controller will be from serial ports, the collected data of AI, DI interface, according to specific uplink
Communications protocol format is packaged, and is sent to main website server using Ethernet or GPRS, realizes main website server to scene
The real-time monitoring of environment.
Further, intelligent environment protection number adopts the working method of instrument mainboard, further includes:
History data store: core controller can also be incited somebody to action in addition to sending main website server in real time for collected data
Data are ranked up according to the time, the database into NandFlash are stored, when main website server enquiry of historical data curve
When, core controller reads the data in database, is packaged according to uplink communication protocol format, is sent out by Ethernet or GPRS
It is sent to main website server.
Historical data export: when user needs to export data, on the date that core controller can be selected according to user, will refer to
The data fixed time are read from database, and are written in the data file of USB flash disk or SD card.
Beneficial effects of the present invention:
Number provided by the invention adopts instrument mainboard and facilitates carry out secondary development, and function is added or modified according to user demand.It takes
The (SuSE) Linux OS of load is 2.6 kernels, can develop different start pictures and show company Logo, have starting progress bar, simultaneously
Root file system is provided；System integration SQLite database supports QT4.8, is equipped with word input method, built-in PPP dialing
Function, built-in VPN client.
On the other hand, number of the invention adopts instrument mainboard and provides a variety of input and output serial ports, facilitates the external various peripheral hardwares of user
Equipment, measurement range is more extensive, and serial ports type is dynamically adapted, can be by certain serial ports all the way according to field device type
It is switched between RS232 and RS485 by toggle switch.
Meanwhile number provided by the invention is adopted instrument mainboard and is greatly improved to data transmission, by configuring difference
GPRS communication module may be implemented number adopt instrument to 2G, 3G, 4G network and movement, connection, the compatibility of telecommunication supplier.
In addition it supports mainboard directly to carry out the function of USB data transmission and SD card read-write, without connection computer, facilitates use
Family uses.
The present invention provides the mainboard that a kind of number adopts instrument, can effectively unite to the various environmental index of peripheral apparatus acquisition
Meter and display, and a variety of input and output serial ports are provided, different detection requirements can be better adapted to.Meanwhile it is provided by the invention
Number, which adopts instrument mainboard, can facilitate user to carry out secondary development, customize different function as needed.
Detailed description of the invention
Figure 1A D conversion circuit figure；
Fig. 2 RTC circuit figure；
Fig. 3 USB HOST interface circuit figure；
Fig. 4 USB OTG interface circuit figure；
100,000,000 network interface circuit of Fig. 5；
100,000,000 network interface of Fig. 6 and network transformer connection circuit figure；
100,000,000 network interface of Fig. 7 and capacitor wiring diagram；
Fig. 8 serial port circuit figure；
Fig. 9 serial port circuit and diode wiring diagram；
Figure 10 core board circuit diagram；
Figure 11 core board connect circuit diagram with peripheral chip.
Specific embodiment:
The present invention is described in detail with reference to the accompanying drawing:
The specific embodiment that HD310 number adopts instrument master control borad is as follows: HD310 environmental detection set include shell,
HD310 number adopts instrument master control borad, LCD touch screen, environmental monitoring peripheral hardware, and wherein HD310 number is adopted instrument master control borad and is installed in shell, with
Environmental monitoring peripheral hardware is connected；LCD touch screen is installed on shell front.
Master control borad I.MX283 core board, USB interface, debugging mouth, serial ports, simulation input mouth, numeral input mouth, number are defeated
Outlet, Ethernet interface, liquid crystal display show plate interface, touch screen interface, RTC, SD card slot, mobile communication module, power interface.Its
Middle I.MX283 core board is connected with above-mentioned module, and wherein GPRS module is standalone module, is connected by winding displacement with master control borad.
As shown in figs. 10-11, I.MX283 core board model M283-128LI, built-in (SuSE) Linux OS carry
I.MX283 processor, processor host frequency 454MHz, memory 128M, NAND FLASH are 128M.
USB interface have 1, it can be achieved that normal read-write to USB flash disk.Design specialized circuit cooperates I.MX283 processor
It realizes and real-time read-write to USB flash disk data can be realized without connecting computer.
Debugging mouth is 1 RS232 interface, realizes system debug function.
Serial ports has 3 road RS232 (wherein 1 tunnel can be used toggle switch and be switched to RS485) and 1 road RS485, for connecting
Peripheral apparatus acquires data.Protection circuit includes: lightning prevention circuit, anti-surge circuit, esd protection circuit and short-circuit protection electricity
Road can satisfy the use in industry spot field, for connecting peripheral apparatus acquisition data.
Simulation input has 2 tunnels, and every road is not less than 12 bit resolutions, and default conditions measurement 4-20mA electric current can pass through jump simultaneously
Line is switched to measurement 0-5V voltage；Wherein 1 tunnel is 2Msps to sample frequency, and another 1 tunnel is 428Ksps.With anti-lightning strike, surge guarantor
Protection circuit.
Isolation numeral input has 4 tunnels, realizes the function of measurement level height.Using photoelectric isolating device, system is increased
Safety and stability, level input range be 0-12V, sample frequency be not less than 1K.
Isolation numeral output has 4 tunnels, realizes the function of control relay switch.It is 5-20V that relay, which can carry voltage,.
Ethernet interface has 1, can exchange RJ45 interface modes as needed or support 100,000,000 nets.
Liquid crystal display shows that plate interface has 2 tunnels, it is characterised in that supports 7 cun of four-wire resistive screen accesses, 24bit image data；
Display board is independent, is connect with bottom plate using fpc-50pin winding displacement.Touch screen interface has 1 tunnel, it is characterised in that supports four-wire ohm
Screen access.
RTC (real-time clock) has 1, it is characterised in that guarantees that at least 5 years power down times are kept.
SD card slot has 1, it is characterised in that ensures that SD card supports reliable SQLite database storage function, SD card can root
It needs to select suitable memory capacity according to production.
Mobile communication module is the one piece of communication board specially designed, which supports two kinds of GPRS and CDMA 1X communications
One of mode is, it can be achieved that upload the function of data to server.It is characterized in that two ways can be free more according to production requirement
It changes, the hardware module of GPRS is SIM900A, and CDMA 1X is MC323；Using serial ports expansion, PPP dialing is supported；Further
Ground, above-mentioned communication module are standalone module, separate with mainboard, connect mainboard by winding displacement.
Power interface has 1 tunnel, inputs 7-20V/2A by the interface as whole system power supply.
LCD liquid crystal touch screen uses full Chinese display interface, and every environmental index of real-time display monitoring has in display
Monitoring item, measured value, reduced value, unit, original value may further enter into equipment management interface and look into other equipment of connection
It sees, manage；Enquiry of historical data and data can be imported and exported into data management interface；Into set interface can logarithm adopt instrument into
The setting and management of row essential information；Operation note can be checked into log query interface.
The environmental index of environment monitoring device monitoring can select corresponding peripheral hardware according to production needs, such as CO2, SO2 concentration
Deng.
In the present invention, A/D conversion interface circuit is supported 0-5V analog signal being converted into digital signal, what is detected
Voltage signal (analog quantity) is converted into the digital equivalent amount that computer can identify, these digital quantities can after computer disposal
To export result.
LCD liquid crystal display controller circuitry can drive 24 LCD liquid crystal displays, can external LCD liquid crystal display by the data of acquisition,
Information real-time display is on the screen, more convenient to use, and information transmitting is more instant.
The circuit of USB HOST and USB two kinds of operating modes of OTG can be supported directly to carry out with master control borad by USB interface
Data transmission, this greatly facilitates use, keeps the data transfer mode of master control borad more flexible changeable.
There are two types of working method, RJ45 or 100 m ethernets for Ethernet interface, can voluntarily be selected according to different production requirements,
Better adapt to various environment.
RTC (real-time clock), it is ensured that power down time was kept in 5 years.
Physical circuit is described below:
As shown in Figure 1, A/D conversion interface circuit includes dual operational amplifier, the first output of the dual operational amplifier
The negative pole end of end and first input end is connected and passes through resistance eutral grounding, the second output terminal of the dual operational amplifier and second
The negative pole end of input terminal is connected and by resistance eutral grounding, the positive terminal of the positive terminal of the first input end and the second input terminal
Respectively two-way, all the way by resistance eutral grounding, another way is grounded by concatenated resistance and diode, in this way can be in external connection
Equipment occur releasing when big current or voltage input, prevent logarithm from adopting instrument and damage.
As shown in Fig. 2, real time clock circuit includes real-time timepiece chip, the vdd terminal of real-time timepiece chip divides three tunnels, all the way
It is connected to power supply end by diode, all the way by the diode, resistance and the battery ground that are connected in series, third road passes through mutually simultaneously
The capacitor and polar capacitor of connection are grounded；The end the real-time timepiece chip SDA and the end SCL pass through corresponding resistance respectively and are connected to
The power supply end and end real-time timepiece chip SDA and the end SCL are connected with core controller respectively.
Usb circuit includes USB_HOST circuit and USB_OTG circuit, as shown in figure 3, USB_HOST circuit includes connecing
Mouthful, two-way is divided at the end VBUS of the interface, connects power supply all the way, and another way passes through capacity earth, the positive terminal of the interface
And negative pole end is respectively divided into three tunnels, all the way by resistance eutral grounding, for another way by protection chip ground, third road road is connected to core
Controller.
As shown in figure 4, USB_OTG circuit includes interface, two-way is divided at the end ID of the interface, protects electricity by ESD all the way
Road ground connection, another way are connected to core controller, and the positive terminal and negative pole end of the interface divide equally two-way, a-road-through overprotection circuit
Ground connection, another way are connected to core controller by resistance, and the end VBUS of the interface is connected to high level and enables chip, the high electricity
The input terminal of flat enabled chip passes through the capacitor being in parallel and polar capacitor is connected to power supply, and the high level enables chip
Output terminals A passes through the capacitor being in parallel and polar capacitor ground connection, the output end B that the high level enables chip divide two-way, all the way
It is connected to feeder ear, is grounded all the way by polar capacitor, the end ENA that the high level enables chip passes through resistance eutral grounding, the height
The end ENB, the end FLGA and the end FLGB that level enables chip pass through corresponding resistance respectively and are connected to power supply end, the height
The end ENA, the end FLGA and the end ENB that level enables chip are respectively connected to core controller.
Ethernet interface circuit includes RJ45 circuit and 100 m ethernet circuit, as illustrated in figs. 5-7, the 100 m ethernet electricity
Road includes ethernet control chip, and ethernet control chip is connected with core controller, the RD positive terminal of ethernet control chip
And negative pole end, TD positive terminal and negative pole end are respectively connected to network transformer, network transformer is connected to corresponding interface.
As Figure 8-9, serial port circuit includes three road RS232 circuits and RS485 circuit, every road RS232 circuit are equal all the way
Including serial port chip, serial port chip port corresponding with core controller is connected, the end T1OUT of the serial port chip,
The end R1IN, the end T2OUT, the end R2IN pass through the resistance being connected in series and diode, TVS ground connection respectively, which, which can make to count, adopts instrument warp
By moment high energy impact events, phenomena such as effectivelying prevent lightning stroke, overshoot.
Working principle is described below: intelligent environment protection number adopts the working method of instrument mainboard, comprising:
Serial port data acquisition: core controller sends data to serial ports and acquires message, field device according to certain period
After receiving message, instrument is adopted to number and carries out data message reply, core controller carries out protocol analysis to the data message received, takes
Wherein useful data portion out, completes serial port data acquisition operation.
Collection of simulant signal: the voltage of output or current signal are input to processor by live analog signalling in real time
ADC chip, the analog-to-digital conversion register that processor reads ADC chip in real time obtains corresponding data, and by nearest 10 times
Data are filtered using median filtering algorithm, obtain final data.
Digital signal acquiring: live switching signal is connected to the GPIO input circuit of processor, processor real-time detection
High and low (the respectively representing on or off) state of the level of GPIO, obtains the switch state of field device.
Send in real time data: processor will be logical according to specific uplink from the collected data of the interfaces such as serial ports, AI, DI
Letter protocol format is packaged, and is sent to main website server using Ethernet or GPRS, realizes main website server to live ring
The real-time monitoring in border.
History data store: processor, can also be by data in addition to sending main website server in real time for collected data
It is ranked up according to certain tissue according to the time, the database into NandFlash is stored, when main website server query history
When data and curves, processor reads the data in database, is packaged according to uplink communication protocol format, by Ethernet or
GPRS be sent to main website server and
Historical data export: when user needs to export data, the date that processor can be selected according to user, when will be specified
Between data read from database, and be written in the data file of USB flash disk or SD card.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (6)
1. intelligent environment protection number adopts instrument mainboard, characterized in that including core controller, the core controller is converted with A/D respectively
Interface circuit, liquid crystal display controller circuitry, usb circuit, Ethernet interface circuit, serial port circuit and real time clock circuit phase
Even, the A/D conversion interface circuit is connected with analog input circuit, the core controller also with digital input circuit phase
Even；Digital quantity is transmitted to core controller through digital input circuit；
The analog input circuit, for inputting the analog quantity of acquisition and being transmitted to A/D conversion interface circuit, A/D translation interface
The analog quantity of upload is converted into digital quantity in circuit and is transmitted to core controller, core controller is to the data of upload into one
Data are exported by output circuit to display circuit after the processing of step；
The usb circuit includes USB_HOST circuit and USB_OTG circuit, and USB_HOST circuit includes interface, described to connect
Two-way is divided at the end VBUS of mouth, connects power supply all the way, and another way passes through capacity earth, the positive terminal and negative pole end point of the interface
It is not divided into three tunnels, all the way by resistance eutral grounding, for another way by protection chip ground, third road road is connected to core controller；
The USB_OTG circuit includes interface, and two-way is divided at the end ID of the interface, is grounded all the way by esd protection circuit, another
Road is connected to core controller, and the positive terminal and negative pole end of the interface divide equally two-way, a-road-through overprotection circuit ground, another way
It is connected to core controller by resistance, the end VBUS of the interface is connected to high level and enables chip, and the high level enables chip
Input terminal pass through the capacitor that is in parallel and polar capacitor is connected to power supply, the output terminals A that the high level enables chip is logical
It crosses the capacitor being in parallel and polar capacitor ground connection, the output end B that the high level enables chip divides two-way, be connected to power supply all the way
End is grounded by polar capacitor all the way, and the high level enables the end ENA of chip by resistance eutral grounding, and the high level is enabled
The end ENB, the end FLGA and the end FLGB of chip pass through corresponding resistance respectively and are connected to power supply end, and the high level is enabled
The end ENA, the end FLGA and the end ENB of chip are respectively connected to core controller；
The Ethernet interface circuit includes RJ45 circuit and 100 m ethernet circuit, and the 100 m ethernet circuit includes Ethernet
Chip is controlled, ethernet control chip is connected with core controller, and the RD positive terminal and negative pole end of ethernet control chip, TD are just
Extreme and negative pole end is respectively connected to network transformer, and network transformer is connected to corresponding interface；
Serial port circuit RS485 circuit including three road RS232 circuits and all the way, every road RS232 circuit includes serial port chip,
Serial port chip port corresponding with core controller is connected, the end T1OUT of the serial port chip, the end R1IN, the end T2OUT,
The end R2IN passes through the resistance being connected in series respectively and diode ground connection, the serial port circuit type are dynamically adapted, the serial port power
Road is switched between RS232 and RS485 by toggle switch；
The core controller is also connect with mobile communication module, digital output, SD card slot and power interface respectively；The shifting
Dynamic communication module includes GPRS module and CDMA 1X module, and the mobile communication module supports PPP to dial using serial ports expansion,
The mobile communication module is that standalone module is separated with the core controller, connects the core controller by winding displacement；Institute
Stating digital output includes isolation digital output circuit, and the isolation digital output circuit is equipped with 4 tunnels, realizes that control relay is opened
The function of pass；The SD card slot has 1, can support reliable SQLite database storage function；The power interface has 1
Road inputs 7-20V/2A by the interface as whole system power supply.
2. intelligent environment protection number as described in claim 1 adopts instrument mainboard, characterized in that the intelligent environment protection number adopt instrument mainboard also with
Mobile communication module is connected, and mobile communication module is connected with server.
3. intelligent environment protection number as described in claim 1 adopts instrument mainboard, characterized in that the A/D conversion interface circuit includes double
Operational amplifier, the first output end of the dual operational amplifier and the negative pole end of first input end are connected and are connect by resistance
The negative pole end of ground, the second output terminal of the dual operational amplifier and the second input terminal is connected and by resistance eutral grounding, described
The positive terminal of the positive terminal of first input end and the second input terminal divides equally two-way, and all the way by resistance eutral grounding, another way passes through string
The resistance and diode of connection are grounded.
4. intelligent environment protection number as described in claim 1 adopts instrument mainboard, characterized in that when the real time clock circuit includes real-time
Clock chip, three tunnels of vdd terminal point of real-time timepiece chip, is connected to power supply end by diode all the way, all the way by being connected in series
Diode, resistance and battery ground, third road passes through the capacitor that is in parallel and polar capacitor ground connection；The real-time timepiece chip
The end SDA and the end SCL pass through corresponding resistance respectively and are connected to power supply end and the end real-time timepiece chip SDA and the end SCL point
It is not connected with core controller.
5. adopting the working method of instrument mainboard using any intelligent environment protection number of claim 1-4, characterized in that include:
Serial port data acquisition: core controller sends data to serial port circuit and acquires message, field device according to certain period
After receiving message, data message reply is carried out, core controller carries out protocol analysis to the data message received, and taking-up wherein has
Data portion completes serial port data acquisition operation；
Collection of simulant signal: the voltage of output or current signal are input to core controller by live analog signalling in real time
ADC chip, the analog-to-digital conversion register that core controller reads ADC chip in real time obtains corresponding data, and will set recently
Fixed time the data received are filtered using median filtering algorithm, obtain final data；
Digital signal acquiring: live switching signal is connected to the GPIO input circuit of core controller, and core controller is real-time
The high and low state for detecting the level of GPIO, obtains the switch state of field device；
Send in real time data: core controller will be from serial ports, the collected data of AI, DI interface, according to specific uplink communication
Protocol format is packaged, and is sent to main website server using Ethernet or GPRS, realizes main website server to site environment
Real-time monitoring.
6. the working method that intelligent environment protection number as claimed in claim 5 adopts instrument mainboard, characterized in that further include:
History data store: core controller, can also be by data in addition to sending main website server in real time for collected data
It is ranked up according to the time, stores the database into NandFlash, when main website server enquiry of historical data curve, core
Heart controller reads the data in database, is packaged according to uplink communication protocol format, is sent to by Ethernet or GPRS
Main website server, and
Historical data export: when user needs to export data, the date that core controller can be selected according to user, when will be specified
Between data read from database, and be written in the data file of USB flash disk or SD card.
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| CN201610056486.XA CN105717833B (en) | 2016-01-27 | 2016-01-27 | Intelligent environment protection number adopts instrument mainboard and working method |
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| CN201610056486.XA CN105717833B (en) | 2016-01-27 | 2016-01-27 | Intelligent environment protection number adopts instrument mainboard and working method |
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| CN105717833B true CN105717833B (en) | 2019-02-26 |
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| CN109976234A (en) * | 2019-04-28 | 2019-07-05 | 无锡大禹科技有限公司 | A kind of Intelligent Dynamic control number adopts instrument |
| CN110428507B (en) * | 2019-05-22 | 2024-08-02 | 南京新中安未来文旅科技有限公司 | Intelligent ticket checking and checking equipment |
| CN110361515B (en) * | 2019-08-15 | 2024-01-02 | 深圳一目科技有限公司 | Chip with water quality detection interface |
| CN113031487A (en) * | 2021-03-19 | 2021-06-25 | 徐州可云智能科技有限公司 | Total station controller |
| CN114422876B (en) * | 2021-12-30 | 2024-03-26 | 成都天佑智云科技发展有限公司 | Data transmission device of total station |
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| CN203465830U (en) * | 2013-08-22 | 2014-03-05 | 北京万维盈创科技发展有限公司 | Environment-friendly data acquisition instrument |
| CN204129480U (en) * | 2014-10-17 | 2015-01-28 | 北京万维盈创科技发展有限公司 | Intelligent environment protection number adopts instrument |
| CN204166331U (en) * | 2014-11-04 | 2015-02-18 | 山东益源环保科技有限公司 | Data acquisition transmission instrument |
| CN104898525A (en) * | 2015-06-14 | 2015-09-09 | 上海北工光翔电气科技有限公司 | Data acquisition device, data acquisition system and data acquisition method |
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Address after: Room D-B512, 5th floor, Building 6, Qilu Software Park, No. 1 Shunhua Road, Jinan High-tech Zone, Shandong Province, 250101 Patentee after: Shandong Houde control technology Limited by Share Ltd Address before: Room D-B512, 5th floor, Building 6, Qilu Software Park, No. 1 Shunhua Road, Jinan High-tech Zone, Shandong Province, 250101 Patentee before: SHANDONG HOLD MONITOR AND CONTROL TECHNOLOGY CO., LTD. |