CN1773242A - Double CPU controller based on computer in atmospheric environment particulate monitoring instrument - Google Patents
Double CPU controller based on computer in atmospheric environment particulate monitoring instrument Download PDFInfo
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Abstract
The present invention relates to a controller for particles detecting instrument in the field of atmospheric particulate mass automatic detection technology. It is mainly formed from main CPU machine control module, parallel-interface expanding module and serial-interface expanding module. The main CPU machine control module can be used for processing data, controlling keyboard, making information exchange between main CPU machine control module and auxiliary CPU machine control module and controlling serial-interface expanding module and parallel-interface expanding module. The auxiliary CPU machine control module mainly is used for implementing work control of air pump in the particles detecting instrument, air-tight control of filter-membrane and charging-discharging control, current working state detection and communication with main CPU. The parallel-interface expanding module mainly is used for implementing expansion of interfaces of data storage, printing and display. Etc, and the serial-interface expanding module mainly is used for implementing switchover of communication between main CPU and auxiliary CPU, electronic balance and PC machine and communication function.
Description
Technical field
The present invention relates to the control device of atmosphere particle monitoring instrument, specifically is computer based double CPU controller in the atmosphere particle monitoring instrument.
Background technology
Atmosphere particulate monitoring instrument mainly contains U.S. Andersen company 240 type binary channels sampling thiefs, the BAM1020 type beta-ray dust measuring instrument of U.S. API company, and U.S. Rupprecht ﹠amp at present; The TEOM1400A type atmosphere particle monitoring instrument of Patashnick company, the atmosphere continuous sampling device of the 110B of the TH series that Tianhong Intelligent Meter Factory, Wuhan is produced or the KC series of 150C (or A) type air total suspended particles sampling thief and Qingdao Laoshan Electronic Instrument General Factory.Wherein the quality analysis of particle adopts the instrument of Weighing method that the instrument of instrument, Wuhan rainbow and the Qingdao Laoshan of Andersen company is arranged.These instruments all utilize filter membrane to gather Atmospheric particulates, and their course of work all is to take off filter membrane component (or filter membrane) by hand to weigh after the work of gathering particle is finished again, and can't realize the robotization of continuous sampling process.Especially necessarily require to realize long-term air quality as this class place, atmosphere environment supervision station and atmospheric environment monitored, comprise the monitoring of the quality of particle.For the monitoring of particle, should, be the most directly perceived with the method for weighing, there is not the method for intermediate conversion error, manual maneuver has hindered the practical application of this method.Realize robotization, just have the control problem of many topworkies.Such as the working cycle of asking of bleeding automatically, weighing automatically control or bleed, weigh automatically, move certainly the working cycle control that the gross weight of film, filter membrane component is weighed, bled automatically automatically; And the output of the processing of sampled data, differentiation and data or the like work, this just needs such controller that energy carries out above-mentioned control to the particle analyzer, and the present invention is this requirement service.
Summary of the invention
The object of the invention is the shortcoming that must manually weigh at present weight method, computer based double CPU controller in a kind of atmosphere particle monitoring instrument is provided, realize from particle sample the control of weighing, data processing, storage, demonstration and move certainly film control, with the full-automatic process of the communication of sensor (electronic balance) or outer PC.
As shown in Figure 1, the computer based double CPU controller comprises in the atmosphere particle monitoring instrument of the present invention:
---the host CPU control module is used for deal with data and supervisory keyboard, and carries out message exchange between the secondary CPU, the work of control serial module and parallel module;
---secondary CPU control module, be used for controlling particle detector air pump, filter membrane component, other topworkies, detect existing duty and with the host CPU communication;
---the parallel interface expansion module is used to store data, the expansion of printing and display interface;
---the serial port handover module is used for the switching and the communication of communication between host CPU and secondary CPU, electronic balance, the PC.
Its principle of work is as follows:
As shown in Figure 1, by the division of labor management of major and minor single-chip microcomputer, promptly host scm is responsible for functions such as the data acquisition of particle quality, analysis, processing, storage, demonstration, Keyboard Control; Secondary single-chip microcomputer mainly is responsible for machinery control, realize the Atmospheric particulates automatic analyzer sampling, weigh, move certainly function such as film automatically; And realize that by the multi-channel serial port divider host CPU and secondary CPU, sensor, outer PC carry out message exchange, by functions such as parallel interface expansion realization storage, printing and demonstrations.
In the host CPU control module shown in Figure 2, the P0 mouth is used to obtain the input information of keyboard, P1 mouth and parallel expansion module exchange message, and demonstration, printing by parallel expansion module control host CPU, the P2 mouth is as the control path of basic display unit, parallel port and storer.The exchange of serial information is carried out in the serial signal TXD/RXD of host CPU and the corresponding port of serial handover module, and realizes carrying out the exchange of information with secondary CPU, weight sensor, outer PC by the analog switch and the level switch block of serial handover module.
P0 mouth in the secondary CPU module shown in Figure 3 is as the FPDP of slave display, P1, P2, P3 mouth be as control port and status information and photoelectricity locating information by read controlled device from the outside to motor, outside topworks, by encoder encodes as the foundation that outside topworks is controlled.
In the parallel expansion module shown in Figure 4, FPDP D transmits the host CPU data message, the display message of basic display unit and the address information of storer are sent in the PA oral instructions, and type information is sent in the PB oral instructions, the PC mouth not only transmission memory address information but also be used for transmitting storing data information.
In the serial expansion mouth shown in Figure 5, the information of host CPU by control signal (SWITH) through the address strobe communication object, by analog switch realize between host CPU and the secondary CPU communicate by letter or again by communicating by letter between serial port change-over circuit realization host CPU and sensor or the outer PC.
The present invention compared with prior art has following advantage:
1. realize the robotization of weight method analyse atmos particle, eliminated the personal error of bringing because of manual weighing operation;
2. the modular design of double CPU controller makes each function realize being guaranteed, and has simplified design of software corresponding, and the functional reliability of controlled device and stability are improved;
3. the networking that is embodied as atmosphere environment supervision of the data exchanging function of serial port expansion provides possibility;
4 utilize the method for station location, the logotype of station condition discrimination, and the instrument functional reliability is further enhanced;
5 controller adaptability are strong, can also be applied on other the detecting instrument.
Description of drawings
Fig. 1 is the controller block diagram based on the two CPU of microcomputer of the present invention;
Fig. 2 is the host CPU control module;
Fig. 3 is a secondary CPU control module;
Fig. 4 is the parallel interface expansion module;
Fig. 5 is the serial port handover module;
Fig. 6 is the example circuit system chart;
Fig. 7 is a main program flow chart;
Fig. 8 is a secondary CPU control flow chart;
Fig. 9 sends data to Sai Duolisi electronic balance process flow diagram for host CPU;
Figure 10 is that host CPU receives the data flowchart from the Sai Duolisi balance.
Embodiment
Fig. 6 is the example that this controller is used for DJ3-1 type binary channels six station self-loopa Atmospheric particulates detectors.Fig. 7 is the host CPU process flow diagram, and Fig. 8 is a secondary CPU control flow chart.Major and minor CPU has used AT89c55 and AT89c52 single-chip microcomputer respectively.Sky straight cut on Circuits System block diagram (Figure of description) inserts the 211D type microbalance of German Sai Duolisi 0.01mg, the control circuit board that inserts servomotor at the Electric Machine Control interface is realized the control to 4 motors respectively, the stepper motor interface inserts SH20803 type driver, realize that by driver SERVO company model is the KH56JM-803 Stepping Motor Control, at each microswitch and discharge cock, insert topworks as the airtight control gear of bleeding, the pivoted arm indexing mechanism, on, the excess of stroke guard signal of the duty of cutting agency and station 1, the lifting insurance of station 2, the location guard signal; Insert the mini-printer of SIUPO type at printer interface; Access nine key boards, main LCD interface insert the dot character type 4 row * LCD that model is TGP004A on the keyboard interface; Secondary LCD interface connects the dot character type 2 row * LCD that model is TGP004A; Photoelectricity positioning signal interface inserts the photoelectricity locator information of six stations.Concrete wiring is as follows:
The host CPU control module
As shown in Figure 2, in the host CPU control module, the P00 of CPU～P056 root signal wire is as 2 row of keyboard and the keyboard scan line of 4 row, and P06, P07 are as RDY/Busy-M and the CE-M signal wire of pin-saving chip AT28C64B.The 8255A of P10～P17 and parallel interface expansion module is with the duplex mode Data transmission; P20～P22 as the control bus of LCD1 (RS, RW, E), P23～P25 as the control bus of storer (EN, OE), P26～P27 as 8255 channel selecting signal lines (A0, A1).R
XD and T
XD links to each other with receiving with the transmission of serial ports, and INT0 and INT1 are as SWITCH0, the SWITCH1 address gating signal (A0, A1) of the analog switch Max309 (U1) in the serial ports.Read-write RD and the WR of the read-write RD of CPU and WR and parallel interface expansion module 8255A join.The T0 pin is as the gating signal of printer, T1 is as the BUSY signal of printer, as the timer usefulness of keyboard scan time (10ms), timer 1 produces clock pulse signal to host CPU timer 0 in initialization, the baud rate control when timer 2 is the communication of serial.
Secondary CPU control module
Secondary CPU control module as shown in Figure 3, CPU uses the AT89C52 single-chip microcomputer, each control task signal is as follows:
P00-P07 is as the data line of LCD2;
P25,26,27 control lines as LCD2;
P10-P17, P20, P21, P22 are as the control bus of motor;
P34 (T0), P35 (T1), P36 (RD), P37 (WD), INT0, INT1 are as the position detection lines of six stations;
RXD and TXD as with the handshake line of host CPU;
JP5, JP6, JP4 are the external input signal sockets:
JP5 is the state detection signal in six stations, and signal obtains B, A, the C signal of U10 after U10 (74HC148) encoder encodes, GS end output low level when coded signal, and as the look-at-me end of scrambler, E0 is as expanding signal end.JP60, JP61, JP63～JP66 are 6 station photoelectricity positioning signals, and the output of these signals after the comparer shaping becomes the corresponding signal of JP4, after these signals enter scrambler U9 (74HC148), are encoded to B, A, C signal.And respectively with JP5 coding output signal (B, A, C, E0, GS) with after deliver to the control signal that P34, P35, P36, P37, the INT1 recompile of secondary CPU move as next step topworks.
JP7 is the guard signal input port of station 1,2,3, P23 (or P24) current potential becomes low level by high level when the status switch of station 1 (or station 2) is depressed, INT0 also becomes low level by high level simultaneously, trigger CPU and interrupt, make the topworks of secondary CPU control station 1 be in non-airtight conditions (or allowing the transposition of secondary CPU control pivoted arm); P17 becomes low level by high level when the status switch of station 3 is depressed, the execution of notice CPU station 3 topworkies.
The parallel interface expansion module
As shown in Figure 4.PA0～PA7 is as the signal of display (LCD1) D0 ~ 7 in the parallel port function expansion circuit, simultaneously also by the address signal of bus driver U6 (74HC373) as storer U4 (AT2864B), PB0～PB7 is directly provided by CPU but print gating signal as the printer data signal.The signal of PC0 ~ 7 both linked to each other with the DQ0～DQ7 of storer as data-signal in addition, also can link to each other with storer and memory address line A0～A7 through bus driver U7 (74HC373), but during as the signal of storer, the corresponding signal of storer then directly links to each other with RDY/Busy, OE_M with WE-M, the CE-M of host CPU.
The serial port handover module
The serial line interface circuit as shown in Figure 4.Function has three, and the one, with secondary CPU communication, another is and the PC communication, the 3rd is the communication between host CPU and the microbalance, and they are that the gating of SWITCH1 decides by analog switch U1 (MAX309CPE) SWITCH0, SWITCH0, SWITCH1, channel selecting allocation table 1:
Table 1
| SWITCH0 | SWITCH1 | With the host scm communication apparatus |
| 0 0 1 1 | 0 1 0 1 | Secondary CPU keeps with PC communication and balance communication |
The serial communication of major and minor CPU: host CPU serial port RXD is that S1A, S1B pin are connected with J3 wire jumper socket with J8 in U1 with the TXD signal.
The serial communication of host CPU and electronic balance: the TXD signal that host CPU sends joins through the T1IN of S2B and serial ports level translator U2 (MAX232CPE), joins as the RXD respective signal of balance as T10UT and balance serial line interface socket J12 after level conversion.The TXD signal that balance sends is connected to R1IN through the J13 pin and receives the RXD signal of the S2A of analog switch as host CPU by R10UT after level conversion.
Through level translator (T2IN-T20UT), same, J23 joins through the RXD signal of level translator (R2IN and R20UT) with CPU as the TXD signal of PC as the TXD signal of host CPU for host CPU and PC communication: S3B.
Serial port handover module and Sai Duolisi electronic balance communication example
As the SWITCH0 of serial port handover module, SWITCH1 was made as 1,0 o'clock, and the Sai Duolisi electronic balance is realized communicating by letter in the software communication mode with controller.Parameter setting such as table 2:
Table 2
| Parameters | Single-chip microcomputer | The Sai Duolisi balance | Remarks |
| Baud rate | 9600 | 9600 | It is 1 that single-chip microcomputer is provided with communication mode, promptly works in 8 asynchronous communications. |
| | 8 | 7 | |
| Parity bit | Do not have | Proofread and correct in the space | |
| Position of | 1 | 1 |
The parity bit of Sai Duolisi is transmitted as the 8th bit data position, and single-chip microcomputer receives whether the 8th of back detection is low level, if then extract preceding 7, as the data that receive.And single-chip microcomputer sends to the 8th of each character in the instruction of Sai Duolisi and is low level, just satisfies the requirement that proofread and correct in the Sai Duolisi space.
The regulation of single-chip microcomputer during according to software handshake sends instruction, become the reception data mode immediately after sending order, because what transmit is character string, so generally when receiving, adopt recycle design, the 8th that detects each character on one side is low level, detect on one side and character 0x0a whether occurs, when the 8th of appearance is not low level, announces that these data are invalid, and require to retransmit; Data Receiving finishes when the 0x0a character occurring.Character string obtains the data surveyed after being converted into numeral.Fig. 9 sends data flow for host CPU, and Figure 10 is host CPU receiving data stream journey figure.
Station input example
The differentiation of six station positions is undertaken by six photoelectricity steady arms that are installed on filter membrane pivoted arm rotation center rear end.Corresponding steady arm sends positioning signal when pivoted arm goes to certain station.This signal is delivered to the JP6 socket and is corresponded respectively to JP60-JP67 (wherein two-lines is continued to employ), after comparer U100 and U200 (LM339) shaping as JP40～JP47 signal, deliver to scrambler U9 (74HC148) respectively, encoded back is as the corresponding signal of C, B, A (A2, A1, A0) signal and the coding (by the coding of scrambler U10) of station state detection signal and, the introducing signal of holding as T1, T10 and the WR of secondary CPU (P36, P35, P34).These three signals use as the I/O signal, truth table such as table 3 that it is corresponding:
Table 3
| D | C | B | A | Corresponding station |
| 0 0 0 0 0 0 | 0 0 0 0 1 1 1 1 | 0 0 1 1 0 0 1 1 | 0 1 0 1 0 1 0 1 | |
Above-mentioned example has passed through the running test of some months, and the result shows that this controller can effectively control the work of six station atmosphere particle monitoring instrument, stable performance, reliable.
Claims (5)
1, computer based double CPU controller in a kind of atmosphere particle monitoring instrument is characterized in that comprising:
---the host CPU control module is used for deal with data and supervisory keyboard, and carries out message exchange between the secondary CPU, the work of control serial module and parallel module;
---secondary CPU control module, be used for controlling particle detector air pump and filter membrane component, detect existing duty and with the host CPU communication;
---the parallel interface expansion module is used to store data, the expansion of printing and display interface;
---the serial port handover module is used for the switching and the communication of communication between host CPU and secondary CPU, electronic balance, the PC.
2, double CPU controller according to claim 1, it is characterized in that in the described host CPU control module, the P0 mouth is used to obtain the input information of keyboard, P1 mouth and parallel expansion module exchange message, and demonstration, printing by parallel expansion module control host CPU, the P2 mouth is as the control path of basic display unit, parallel port and storer; The exchange of serial information is carried out in the serial signal TXD/RXD of host CPU and the corresponding port of serial handover module, and realizes carrying out the exchange of information with secondary CPU, sensor, outer PC by the analog switch and the level conversion of serial handover module.
3, double CPU controller according to claim 1, it is characterized in that in the described secondary CPU module, the P0 mouth is as the FPDP of slave display, P1, P2, P3 mouth be as to the control port of motor, outside topworks and read the status information and the photoelectricity locating information of controlled device from the outside, by encoder encodes as the foundation that outside topworks is controlled.
4, double CPU controller according to claim 1, it is characterized in that in the described parallel expansion module, FPDP D transmits the host CPU data message, the display message of basic display unit and the address information of storer are delivered in the PA oral instructions, type information is sent in the PB oral instructions, the PC mouth not only transmission memory address information but also be used for transmitting storing data information.
5, double CPU controller according to claim 1, it is characterized in that in the described serial expansion mouth, the information of host CPU by control signal (SWITH) through the address strobe communication object, by analog switch realize between host CPU and the secondary CPU communicate by letter or again by communicating by letter between serial port change-over circuit realization host CPU and PC or the sensor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721580A (en) * | 2012-07-11 | 2012-10-10 | 山东省分析测试中心 | Multifunctional automatic acquisition and sample preparation system for airborne dust |
| CN102735508A (en) * | 2012-07-11 | 2012-10-17 | 山东省分析测试中心 | Atmospheric dust phase real-time analytic system |
| CN102901653A (en) * | 2012-11-07 | 2013-01-30 | 西安创展控制系统工程有限公司 | Intelligent digital gold powdered ore sampling system |
| CN105258980A (en) * | 2014-07-16 | 2016-01-20 | 天津博乐科技有限公司 | Comprehensive atmosphere sampling controlling system based on double CPU |
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| CN2205003Y (en) * | 1994-06-28 | 1995-08-09 | 李锡润 | Dust concentration tester |
| KR100252215B1 (en) * | 1997-05-02 | 2000-04-15 | 윤종용 | Monitoring system of the state of clean room measuring apparatus |
| CN2365712Y (en) * | 1998-12-21 | 2000-02-23 | 北京市新技术应用研究所 | Portable microcomputer digital dust instrument |
| CN2368083Y (en) * | 1998-12-25 | 2000-03-08 | 北京市新技术应用研究所 | Collecting and processing device for dust data |
| US6606582B1 (en) * | 2000-03-27 | 2003-08-12 | Seh America, Inc. | Universal system, method and computer program product for collecting and processing process data including particle measurement data |
| CN2482145Y (en) * | 2001-06-19 | 2002-03-13 | 华南师范大学 | Remote input device of intelligent instrument collecting and distributing system |
| US6773932B2 (en) * | 2001-11-30 | 2004-08-10 | Seh America, Inc. | System and method for collecting, storing, and displaying process data including particle measurement data |
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2005
- 2005-09-02 CN CNB2005100369708A patent/CN100437079C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721580A (en) * | 2012-07-11 | 2012-10-10 | 山东省分析测试中心 | Multifunctional automatic acquisition and sample preparation system for airborne dust |
| CN102735508A (en) * | 2012-07-11 | 2012-10-17 | 山东省分析测试中心 | Atmospheric dust phase real-time analytic system |
| CN102735508B (en) * | 2012-07-11 | 2014-10-22 | 山东省分析测试中心 | Atmospheric dust phase real-time analytic system |
| CN102721580B (en) * | 2012-07-11 | 2016-04-13 | 山东省分析测试中心 | Multifunction atmospheric floating dust gathers and sample preparation system automatically |
| CN102901653A (en) * | 2012-11-07 | 2013-01-30 | 西安创展控制系统工程有限公司 | Intelligent digital gold powdered ore sampling system |
| CN102901653B (en) * | 2012-11-07 | 2015-02-25 | 西安创展控制系统工程有限公司 | Intelligent digital gold powdered ore sampling system |
| CN105258980A (en) * | 2014-07-16 | 2016-01-20 | 天津博乐科技有限公司 | Comprehensive atmosphere sampling controlling system based on double CPU |
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