CN2472235Y - Indoor air quality monitor - Google Patents
Indoor air quality monitor Download PDFInfo
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- CN2472235Y CN2472235Y CN01217964.7U CN01217964U CN2472235Y CN 2472235 Y CN2472235 Y CN 2472235Y CN 01217964 U CN01217964 U CN 01217964U CN 2472235 Y CN2472235 Y CN 2472235Y
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- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000012806 monitoring device Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- 239000001301 oxygen Substances 0.000 claims abstract description 3
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 229910005965 SO 2 Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004887 air purification Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
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Abstract
The utility model relates to a quality monitoring device of indoor air, which comprises a data collecting and controlling device, an A/D switching circuit, a group of air sensors of CO2, SO2, CO, nitrogen and oxygen, a multiway switch, and a signal amplifying and adjusting circuit; wherein, the data collecting and controlling device comprises an air sensor and a single micro processor. The utility model is characterized in that the output of the sensors is connected with the multiway switch and the signal amplifying and adjusting circuit formed by connecting the multi-switch and the amplifier; the output of the adjusting circuit is connected with the A/D switching circuit and then is connected with the single microprocessor. The utility model utilizes various air sensors to monitor the indoor air, conducts real-time monitoring of various gas concentrations, sounds alarm, and start the indoor air purifying device.
Description
The utility model relates to the data acquisition and the monitor-control apparatus of IAQ (indoor air quality).
Current air quality monitoring has become a vital task of environmental administration, and State Bureau of Environmental Protection has been formulated standard environment air quality standard (GB 3095-1996), and at several primary pollution source SO
2, CO, O
3, NO
x, TSP, NO
2, PM
10Introduced the index of air pollution index (API) as the evaluation of air quality quality, a lot of monitoring method and equipment to these gases also should have been arranged both at home and abroad mutually, but the monitoring of these air qualities is mainly at atmospheric environment, and also different at the monitoring method and the instrument and equipment of different pollution source uses, observation process and operation are also comparatively complicated.As for but occurring, perhaps be the household fuel gas, liquefied gas alarm etc. of some specific uses at the most at the monitoring equipment of IAQ (indoor air quality) and instrument.Through the analysis of main harmful gas composition in the room air composition is reached a conclusion: because indoor people's the breathing and the sealing in modern room, the main harmful gas that impacts IAQ (indoor air quality) is a carbon dioxide, be subjected to the influence of factors such as the decoration of ambient atmosphere environment and room, burning appliance use in addition, also have the existence of toxic gases such as small amounts of sulfur dioxide, nitrogen dioxide, carbon monoxide.And the current IAQ (indoor air quality) comprehensively monitoring instrument equipment that can be used for this multiple gases is monitored does not simultaneously occur as yet.
The utility model purpose is: a kind of comprehensive monitoring instrument equipment is provided, the system and device that can monitor IAQ (indoor air quality), provide a kind of can be to indoor several main harmful toxic gas CO
2, SO
2, NO
2, the CO isoconcentration carries out real-time automatic measuring, shows and preservation, and Monitoring Data is carried out analysis-by-synthesis; The utility model purpose also is to make whether opening air cleaning unit at any time according to predetermined alarm criteria and system control strategy, guarantee the indoor high-quality air quality environment that has, and this utility model also provide a kind of can with the standard RS-232 communication interface of compunication, cooperating the corresponding computer application software can carry out the IAQ (indoor air quality) database files, the long term data monitoring analysis, and the monitored results data such as daily sheet, weekly return and annual air quality form of IAQ (indoor air quality) can be provided.
The implementation of the utility model purpose is: the indoor air quality monitoring device comprises data acquisition that gas sensor, chip microprocessor constitute and control device, A/D change-over circuit, CO
2, SO
2, CO and nitrogen carrier of oxygen sensor groups, multi-way switch, signal amplifying and conditioning circuit, the signal amplifying and conditioning circuit that the output that it is characterized in that the body sensor group connects multi-way switch, is made of multi-way switch concatenation operation amplifier, modulate circuit output connects the A/D change-over circuit again, and then connects chip microprocessor.
Also be provided with watchdog circuit in addition, comprise that also the light isolating interface connects the output terminal of chip microprocessor, air purifier etc. and forms basic indoor air-purification device, in addition, connect communication interface and computer system and can further form expanding system with Internet remote inquiry function and perfect database function.
The utility model utilizes different gas sensors, employing is the single-chip data acquisition and the control system of core with the AT89C51 chip, finish real-time monitoring to indoor all gases concentration, simultaneously according to predefined alarm criteria, when detecting certain gas and exceed standard, system opens indoor air-purification device automatically, carries out air purification and handles, and alarm indication is provided simultaneously.Be the high stability and the reliability of enhanced system, system uses 555 chips and 74LS123 to form the hardware watchdog circuit, avoids Single Chip Microcomputer (SCM) program to run and flies; As the A/D conversion chip, form the data acquisition input channel with ICL7135 with the respective peripheral circuit; Form light with opto-coupler chip and isolate output control channel, guaranteeing does not influence microcontroller system circuit to the break-make control of forceful electric power.
Characteristics of the present utility model are: can carry out density real-time monitoring to indoor multiple main toxic and harmful simultaneously, and can exceed standard according to the optimization system controlling schemes and report to the police automatically and the automatic air cleaning unit of opening, finish indoor air purification work, and the utility model has used hardware watchdog circuit and light to isolate output control, have very high system stability and reliability, can effectively finish the monitoring and the control task of IAQ (indoor air quality), for the people of indoor life provide a high-quality air ambient, has very high economic benefit, social benefit and environmental benefit.
Below in conjunction with accompanying drawing the utility model is elaborated:
Fig. 1 is the utility model hardware block diagram;
Fig. 2 is the utility model sensor temperature compensating circuit figure;
Fig. 3 switches and signal conditioning circuit figure for the utility model multichannel;
Fig. 4 is the utility model hardware watchdog circuit diagram;
Fig. 5 is the utility model light isolation control circuit figure;
Fig. 6 is the utility model 7135A/D change-over circuit figure;
Fig. 7 is the utility model RS-232 Computer Communications Interface circuit diagram;
As shown in Figure 1, the utility model is mainly by AT89C51 chip, ICL7135A/D conversion chip, CO
2, SO
2, NO
2, CO sensor groups, multi-way switch, operational amplifier, clock system, regularly and logic control, light isolating interface, watchdog circuit, air purifier etc. form basic indoor air quality monitoring devices, in addition, connect communication interface and computer system and can further form expanding system with Internet remote inquiry function and perfect database function.The supervising device fundamental mode is: sensor probe is contained on monitored indoor wall or the ceiling, single-chip microcomputer 89C51 controls multi-way switch according to data acquisition sequence, connect the signal output of a plurality of sensor groups in turn, through the operational amplifier of low drift, high stable in addition signal condition, guarantee the linearity and the degree of stability of sampled signal thereafter.Signal after the conditioning carries out analog to digital conversion by ICL7135, and the analog signal conversion of gathering is become digital signal, and single-chip microcomputer 89C51 reads these raw digital signal, carries out secondary processing again and handles the concentration value that finally obtains every kind of monitored toxic and harmful.Software control procedure in the single-chip microcomputer judges whether these data exceed standard, if exceed standard the output control signal, opens the air purifier switch by the light isolating interface, and the work of priming chamber inner air-cleaning starts alarm indication simultaneously; When the environmental gas concentration value recovers normal condition again, close air purifier.Data acquisition and Processing Algorithm and systematic control algorithm are finished by software programming by single-chip microcomputer.
Fig. 2 is the sensor temperature compensating circuit:
Because the self character of sensor element has determined its resistance can produce significantly drift along with the variation of ambient temperature, cause the output of metering circuit to produce zero point drift, the conference of drifting about causes the insensitive of measurement or sensitive excessively, makes the reliability decrease of complete machine.For this reason, according to the Devices Characteristics curve, we have added compensating circuit to measurement, carry out temperature compensation, and as shown in Figure 2, wherein RT is a thermo-sensitive resistor, and RS is a sensor resistance.When temperature variation caused sensor resistance RS generation drift, thermo-sensitive resistor RT also can change thereupon, and therefore, concerning whole metering circuit, the drift that is caused by temperature is cancelled, and outside metering circuit is not exerted an influence.
Fig. 3 switches for the utility model multichannel and signal amplifies and modulate circuit figure
This device need to be gathered 4 road signals, and front-end A/D conversion has only one the tunnel, therefore adopts multiway analog switch CMOS chip HCF4051BE (being called for short 4051) to finish the switching of data acquisition channel, each road sensor output signal of acquisition time.This chip is 8 the tunnel to select one, and this device has only used 4 the tunnel; Passage control port A, B, C are by 3 delivery outlet controls in the single-chip microcomputer extended resources 377; 4051 output terminal is connected to the positive input of integrated operational amplifier OP07 by resistance R 1.Form the input of signal forward by R1, R2, R3, R4 and amplifier OP07 and amplify modulate circuit, can obtain different enlargement factors by the resistance of adjusting resistance R 1, R2, R3, R4 as required, be connected to the input port of ICL7135 through the voltage signal after the conditioning as the input of A/D conversion.
Fig. 4 is the utility model hardware watchdog circuit diagram
Antijamming capability for further raising system, this device utilizes the outer watchdog timer of sheet to design the hardware watchdog circuit, mainly monostable trigger 74LS123 can be triggered again and timing chip CA555E forms by a slice is two, wherein 74LS123 input end meets the output port P1.7 (the 8th pin) of single-chip microcomputer 89C51, and the RESET input end of 89C51 is connected to output terminal the 5th pin of 74LS123 by the resistance of a 5.1K.555 timers constitute a no steady multivibrator, when system software moves, remove the watchdog circuit that resets termly, program fleet appears in case system is interfered, then system software will no longer reset to monitoring circuit, and this moment, multivibrator will be exported periodic pulse signal, and impel the RESET output cycle reset signal of monostable trigger to the 89C51 single-chip microcomputer, thereby make single-chip microcomputer again from the work of beginning executive routine, avoided the deadlock phenomenon.
Fig. 5 is the utility model light isolation control circuit figure
A task of the utility model device is exactly the control to indoor air cleaner, it is controlled by one group of light spacing output circuit, its principle of work is: air purifier is received power supply by the normal open switch of relay, do not work owing to relay at ordinary times, K switch 1 is in off-state, and clarifier is not worked because of feed circuit are obstructed; When system's control need be opened clarifier, sending control signal by 89C51, to make the 51-OUTC port be low level, make that the light emitting diode forward conduction in the optocoupler is luminous, thereby the output terminal conducting that makes optocoupler provides electric current for the base stage of triode 9013, this electric current further makes the conducting of relay line bag, and for it provides bigger working current, the conducting adhesive gauge tap K1 of relay connects the clarifier feed circuit, starts clarifier work.When not needing to purify, 89C51 sends control signal makes the 51-OUTC port again for high level, light emitting diode owing to two ends are that high level is cut off can not be luminous, subsequent conditioning circuit also is disconnected in succession, the clarifier power supply is cut off again and quits work.This device uses optically-coupled to make the forceful electric power alternate current operation environment of back clarifier and electric fully isolation of control system of front, avoids exchanging the interference of strong power system to the single-chip microcomputer weak electricity system, makes system's operation more reliable and more stable.
Fig. 6 is the utility model 7135A/D change-over circuit figure
Consider that monitored indoor gas concentration change is slower, native system has used the A/D conversion chip ICL7135 of low-speed highly precise, and it is a kind of integrated ADC chip of four and half double integrator monolithics commonly used, and resolution is equivalent to 14 bits, the conversion accuracy height, transformed error is ± 1LSB; Chip has adopted the automatic zero adjustment technology, can guarantee long-time stability at normal temperatures at zero point.The peripheral circuits of 7135 work and with being connected as shown in Figure 6 of single-chip microcomputer, wherein the circuit module formed of MC1403 is the 7135 1V reference voltages that standard is provided, the oscillatory circuits of 4049 compositions are 7135 work clocks that 125kHz is provided.7135 select 1 data multiplex switch 74LS157 to realize with being connected by 42 of microprocessor 89C51, the gating signal of 74LS157 is exported by 7135 D5 and is controlled, like this when the A/D EOC, D5 exports high level, 74LS157 gating category-B passage, single-chip microcomputer read in the data bit B1 of D5 and mode bit POL, OVER, UNDER value; Become low level when finishing when (this process comprises D4～D1 data output period) when D5 exports, 74LS157 gating category-A passage, single-chip microcomputer will read in 8421 code value B8, B4, B2, the B1 of D4～D1 position successively.Save the mouth resource of single-chip microcomputer so to greatest extent, only taken 5 data input ports altogether.7135 data output strobe pin is directly received the interrupting input end mouth INTO of single-chip microcomputer, and the interrupt service routine that starts single-chip microcomputer reads A/D data converted result.Work schedule according to 7135 is connected characteristics with circuit system, and single-chip microcomputer adopt to interrupt and inquires about the working method that combines, and by hardware-initiated interrupt service routine, enters the work of carrying out data query, mode bit behind the interrupt service routine.Fig. 7 is the utility model RS-232 Computer Communications Interface circuit diagram
This circuit provides the level shifter interface of single-chip microcomputer and computing machine full duplex serial communication, because the logic level of RS-232 communication standard regulation is different with the cmos circuit logic with the TTL of single-chip microcomputer, so the utility model device has used the MAX202 chip to finish this level logic conversion.The communication line of single-chip microcomputer reality has only been used three in this interface, promptly sends data line (TXD), receives data line (RXD) and signal ground.
Claims (4)
1, indoor air quality monitoring device comprises data acquisition that gas sensor, chip microprocessor constitute and control device, A/D change-over circuit, CO
2, SO
2, CO and nitrogen carrier of oxygen sensor groups, multi-way switch, signal amplifying and conditioning circuit, the signal amplifying and conditioning circuit that the output that it is characterized in that the body sensor group connects multi-way switch, is made of multi-way switch concatenation operation amplifier, modulate circuit output connects the A/D change-over circuit again, and then connects chip microprocessor.
2, by the described indoor air quality monitoring device of claim 1, it is characterized in that also being provided with air purifier, light isolating interface, the light isolating interface connects the output terminal of chip microprocessor, and the output of light isolating interface connects the control end of air purifier.
3, by the described indoor air quality monitoring device of claim 1, it is characterized in that also being provided with in addition 555 chips and two hardware watchdog circuit that can trigger monostable trigger 74LS123 composition again, the input end of 74LS123 meets the output port P1.7 of single-chip microcomputer 89C51.
4, by the described indoor air quality monitoring device of claim 1, it is characterized in that multi-way switch multiway analog switch CMOS chip HCF4051BE, each road sensor output signal of acquisition time, this chip output is connected to the positive input of integrated operational amplifier OP07 by resistance R 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01217964.7U CN2472235Y (en) | 2001-03-21 | 2001-03-21 | Indoor air quality monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01217964.7U CN2472235Y (en) | 2001-03-21 | 2001-03-21 | Indoor air quality monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2472235Y true CN2472235Y (en) | 2002-01-16 |
Family
ID=33636086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01217964.7U Expired - Fee Related CN2472235Y (en) | 2001-03-21 | 2001-03-21 | Indoor air quality monitor |
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| Country | Link |
|---|---|
| CN (1) | CN2472235Y (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806486A (en) * | 2010-04-20 | 2010-08-18 | 张雪峰 | Urban epidemic prevention and control system with air safety barriers and method |
| CN101300533B (en) * | 2005-08-30 | 2010-11-10 | 西门子工业公司 | Application of microsystems for real time ieq control |
| CN102353751A (en) * | 2011-06-13 | 2012-02-15 | 北京世坤环境科技有限公司 | Method for evaluating indoor air quality and system for monitoring and analyzing indoor air quality |
| CN101208563B (en) * | 2005-03-10 | 2012-05-16 | 艾尔库伊蒂公司 | Multipoint air sampling system having common sensors to provide blended air quality parameter information for monitoring and building control |
| CN102622857A (en) * | 2010-12-10 | 2012-08-01 | 霍尼韦尔国际公司 | System and method of providing compliance and alerting of toxic gas exposure for health monitoring and plant maintenance |
| CN102680651A (en) * | 2012-05-28 | 2012-09-19 | 中国矿业大学 | System and method for monitoring and acquisition of CO2 in vertical space |
| CN103048427A (en) * | 2012-12-25 | 2013-04-17 | 安科智慧城市技术（中国）有限公司 | Indoor air quality assessment method, device and system |
| CN102140879B (en) * | 2010-02-02 | 2013-08-07 | 兰泽华 | Household livable air quality adjusting and control device and method |
| CN104062401A (en) * | 2013-11-06 | 2014-09-24 | 苏州天趣信息科技有限公司 | Warning device |
| CN104316656A (en) * | 2014-11-05 | 2015-01-28 | 江苏科技大学 | Waste gas purification real-time monitoring system and method |
| CN104456857A (en) * | 2014-12-31 | 2015-03-25 | 桂林科技企业发展中心 | Indoor harmful gas monitoring system |
| CN108181433A (en) * | 2018-01-24 | 2018-06-19 | 南宁天亮精细化工有限责任公司 | A kind of air pollutants monitoring system and its monitoring method |
| CN110347895A (en) * | 2019-06-11 | 2019-10-18 | 重庆工商大学融智学院 | Ecological space data crawling method based on Web |
| CN110823273A (en) * | 2018-08-14 | 2020-02-21 | 大陆汽车电子（连云港）有限公司 | Sensor monitoring system and method |
-
2001
- 2001-03-21 CN CN01217964.7U patent/CN2472235Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208563B (en) * | 2005-03-10 | 2012-05-16 | 艾尔库伊蒂公司 | Multipoint air sampling system having common sensors to provide blended air quality parameter information for monitoring and building control |
| CN101300533B (en) * | 2005-08-30 | 2010-11-10 | 西门子工业公司 | Application of microsystems for real time ieq control |
| CN102140879B (en) * | 2010-02-02 | 2013-08-07 | 兰泽华 | Household livable air quality adjusting and control device and method |
| CN101806486B (en) * | 2010-04-20 | 2012-07-18 | 张雪峰 | Urban epidemic prevention and control system with air safety barriers and method |
| CN101806486A (en) * | 2010-04-20 | 2010-08-18 | 张雪峰 | Urban epidemic prevention and control system with air safety barriers and method |
| CN102622857A (en) * | 2010-12-10 | 2012-08-01 | 霍尼韦尔国际公司 | System and method of providing compliance and alerting of toxic gas exposure for health monitoring and plant maintenance |
| CN102353751A (en) * | 2011-06-13 | 2012-02-15 | 北京世坤环境科技有限公司 | Method for evaluating indoor air quality and system for monitoring and analyzing indoor air quality |
| CN102680651B (en) * | 2012-05-28 | 2016-01-20 | 中国矿业大学 | A kind of vertical space CO 2monitoring and acquisition system and method |
| CN102680651A (en) * | 2012-05-28 | 2012-09-19 | 中国矿业大学 | System and method for monitoring and acquisition of CO2 in vertical space |
| CN103048427A (en) * | 2012-12-25 | 2013-04-17 | 安科智慧城市技术（中国）有限公司 | Indoor air quality assessment method, device and system |
| CN103048427B (en) * | 2012-12-25 | 2014-06-25 | 安科智慧城市技术（中国）有限公司 | Indoor air quality assessment method, device and system |
| CN104062401A (en) * | 2013-11-06 | 2014-09-24 | 苏州天趣信息科技有限公司 | Warning device |
| CN104316656A (en) * | 2014-11-05 | 2015-01-28 | 江苏科技大学 | Waste gas purification real-time monitoring system and method |
| CN104456857A (en) * | 2014-12-31 | 2015-03-25 | 桂林科技企业发展中心 | Indoor harmful gas monitoring system |
| CN108181433A (en) * | 2018-01-24 | 2018-06-19 | 南宁天亮精细化工有限责任公司 | A kind of air pollutants monitoring system and its monitoring method |
| CN110823273A (en) * | 2018-08-14 | 2020-02-21 | 大陆汽车电子（连云港）有限公司 | Sensor monitoring system and method |
| CN110347895A (en) * | 2019-06-11 | 2019-10-18 | 重庆工商大学融智学院 | Ecological space data crawling method based on Web |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |