CN105203270A - Gas leakage monitoring equipment and method based on wireless communication - Google Patents
Gas leakage monitoring equipment and method based on wireless communication Download PDFInfo
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Abstract
The embodiment of the invention provides gas leakage monitoring equipment and method based on wireless communication. The equipment comprises a micro control unit and a temperature sensor, a flow sensor and a wireless radio frequency module which are connected with the micro control unit, wherein the flow sensor is used for detecting gas leakage amount of a gas leakage opening of a sealing element, the temperature sensor is used for detecting the temperature of the environment where the equipment containing gas is located, the microprocessor unit can compensate the gas leakage amount according to the temperature value, and the wireless radio frequency module is used for transmitting received data to a corresponding base station. By means of the gas leakage monitoring equipment and method based on the wireless communication, the detection accuracy of the gas leakage amount can be improved through temperature compensation, and meanwhile the detected data can be transmitted out remotely in time, the timeliness and the safety are guaranteed, and the equipment can be suitable for various gas through calibration. Compared with the prior art, the accuracy, the timeliness and the safety are improved.
Description
Technical field
The present invention relates to Leakage Gas monitoring field, particularly relate to a kind of Leakage Gas monitoring equipment based on radio communication and method.
Background technology
At present, the mean concentration etc. of control atmosphere pollution, reduction PM2.5 has become the common recognition of people, the focal point of VOCs (Volatileorganiccompounds) the i.e. improvement of volatile organic compounds people especially, the main source of volatile organic compounds is the waste gas of plant emissions, and harmful volatile organic compounds mainly comprises acetone, toluene, phenol, xylidin, formaldehyde, normal hexane, ethyl acetate etc.Volatile organic matter (VOCs) irradiates at sunlight and issues third contact of a total solar or lunar eclipse chemical reaction, the ground level ozone and gasoloid (PM2.5) that cause photo-chemical smog also to produce being detrimental to health, VOCs is as the important as precursors thing of ozone and PM2.5, and it reduces discharging to improve air quality has critical impact.
According to U.S. EPA investigation, the VOCs discharge capacity that equipment leakage causes is considerably beyond containers store, sewage plant, jump operation, ventilation process etc., and valve and interface account for and leaks more than 90% of total emission volumn.Inorganization for petroleum chemical enterprise leaks present situation, and generally adopt Leak Detection reparation (LDAR, leakdetectionandrepair) method control discharge abroad, Timeliness coverage exists the assembly of leakage phenomenon, and carries out repairing or replacing.The detecting instrument that VOCs leaks mainly contains Laboratory Instruments, online instrument and portable instrument three major types.
When the VOCs leakage of Laboratory Instruments to chemical plant is monitored, usually use adsorbent, sampler bag, Soviet Union's code tank or absorbing liquid that VOCs is gathered go back to laboratory, then after the pretreatment process such as Thermal desorption, the solvent analysis, utilize GC or HPLC to analyze.Laboratory Instruments detects Major Difficulties and is to select the suitable method of sampling to ensure to collect all VOCs, the traffic program of constituting criterion prevents the loss of VOCs in transportation, and all volatile organic matters enter analytical instrument to select suitable pretreatment process to ensure.Laboratory analysis methodologies major defect is poor in timeliness, easily causes sample loss in sampling and transportation, thus the accuracy of impact mensuration and reliability.
Online instrument mainly contains on-line gas chromatography, on-line mass spectroscopy instrument, online gas chromatograph-mass spectrometer, in-situ infrared spectroscopy instrument, online laser detecting apparatus and online differential optical absorption spectrometer etc.Different volatile organic matter monitorings needs to select different detecting instruments and detection method, pure gas can only be surveyed with a VOCs in-line analyzer, the general volume of VOCs in-line analyzer is larger, higher to the installation environment of equipment, inapplicablely be arranged on the occasion that there is flammable explosive gas, VOCs in-line analyzer is high to power requirement, but petrochemical complex, packages printing, spraying etc. exist the occasions such as volatile organic compounds leakage just can only can provide civil power in specific region; In addition VOCs in-line analyzer price is high, can only monitor significant points, uses possibility low on a large scale.
Portable instrument mainly contains portable FID/PID detecting device, portable infrared spectrum analyser, Portable laser spectrometer, portable gas chromatograph-mass spectrometer etc., and in the standard of the up-to-date announcement of Chinese Ministry of Environmental Protection, portable instrument refer to fid detector, PID detecting device and infrared absorption detecting device three kinds.The industries such as current chemical industry monitor conventional LDAR technology just based on portable instrumentation to VOCs.When using portable instrument to detect VOCs leakage, detecting instrument is generally from VOCs leakage hole about 2.5 centimeters, what it detected is the VOCs concentration of having leaked in peripheral air, there are differences with actual value, in addition portable instrument is used to be that data age is poor to the major defect that VOCs monitors, generally take the mode of patrolling and examining for 3 to 6 months based on industries such as petrochemical industry, the VOCs being difficult to the devices such as Timeliness coverage seal leaks on a large scale.
Summary of the invention
In view of this, the present invention aims to provide a kind of Leakage Gas monitoring equipment based on radio communication and method, to improve the accuracy of detection of quantity of gas leakage, improves ageing, security, and can realize the detection of a kind of equipment to multiple gases leakage rate.
For achieving the above object, one aspect of the present invention provides a kind of Leakage Gas monitoring equipment based on radio communication, comprising:
Micro-control unit, the temperature sensor, flow sensor and the wireless radio frequency modules that are connected respectively with described micro-control unit;
Wherein, described flow sensor is for detecting the quantity of gas leakage at seal Leakage Gas mouth place;
Described temperature sensor is for detecting the temperature of environment residing for the equipment of described gas place;
Described micro-control unit is used for compensating described quantity of gas leakage according to described temperature, the quantity of gas leakage after being compensated;
Described wireless radio frequency modules is transferred to corresponding base station for the data received.
Preferably, described micro-control unit is also for adjusting the sense cycle of described flow sensor and/or the cycle to described wireless radio frequency modules transmission data according to described quantity of gas leakage.
Preferably, described monitoring equipment also comprises the battery of powering for described micro-control unit; Described micro-control unit also for detect described battery voltage and according to described Voltage Cortrol the sense cycle of flow sensor and/or the cycle to described wireless radio frequency modules transmission data.
Preferably, described micro-control unit is connected with described wireless radio frequency modules by USART interface.
Preferably, described micro-control unit is connected with described sensor by IIC interface.
Present invention also offers a kind of Leakage Gas monitoring method based on radio communication, be applied in above-mentioned monitoring equipment, described monitoring method comprises:
Described flow sensor detects the quantity of gas leakage at seal Leakage Gas mouth place;
Described temperature sensor detects the temperature of environment residing for the equipment of described gas place;
Described micro-control unit compensates described quantity of gas leakage according to described temperature, the quantity of gas leakage after being compensated;
The data received are transferred to corresponding base station by described wireless radio frequency modules.
Preferably, described monitoring method also comprises:
Described micro-control unit adjusts the sense cycle of described flow sensor and/or the cycle to described wireless radio frequency modules transmission data according to described quantity of gas leakage.
Preferably, described monitoring equipment also comprises the battery of powering for described micro-control unit; Described monitoring method also comprises:
Described micro-control unit detect described battery voltage and according to described Voltage Cortrol the sense cycle of flow sensor and/or the cycle to described wireless radio frequency modules transmission data.
Preferably, described micro-control unit is connected with described wireless radio frequency modules by USART interface.
Preferably, described micro-control unit is connected with described sensor by IIC interface.
The scheme of the embodiment of the present invention can improve the accuracy of detection of quantity of gas leakage by temperature compensation, the data simultaneously detected can remote transmission be gone out timely, ensure that ageing, security, and checkout equipment of the present invention is applicable to multiple gases.Compared to existing technology, improve accuracy, ageing, security.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the equipment structure chart that the embodiment of the present invention provides;
Fig. 2 is the embodiment of the present invention one supplying method process flow diagram.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The embodiment of the present invention one provides a kind of Leakage Gas monitoring equipment based on radio communication, and as shown in Figure 1, this monitoring equipment comprises:
Micro-control unit 11, the temperature sensor 12, flow sensor 13 and the wireless radio frequency modules 14 that are connected respectively with described micro-control unit 11.
Above-mentioned flow sensor 13 is for detecting the quantity of gas leakage at seal Leakage Gas mouth place.
Said temperature sensor 12 is for detecting the temperature of environment residing for the equipment of gas place.
Micro-control unit 11 is for the data that read in the sensor and compensate the quantity of gas leakage received according to said temperature data, the quantity of gas leakage after being compensated.
Because temperature has certain influence to gas flow, under different temperatures, the error of flow sensor is different, therefore, needs to demarcate according to temperature the quantity of gas leakage received namely to adopt temperature compensation algorithm for improving precision.The temperature compensation algorithm implementation method of flow measurements is as follows: before product export, adopt high-precision gas flowmeter, under different temperatures value, (from work minimum temperature to maximum temperature) demarcates some flows point, demarcates some flow values (this some flow value is chosen from minimum range to maximum range) under each temperature spot simultaneously.These datas on flows carry nonvolatile memory stored in plate.When equipment is when normally working, first recording flow value, then recording equipment current temperature value.Then interpolation arithmetic is carried out to temperature value, then according to the temperature value after interpolation arithmetic, transfer the flux scale fixed point be stored in nonvolatile memory, according to method of interpolation, flow measurement value is demarcated.
Utilize wireless radio frequency modules 14 afterwards by the data read as temperature, the quantity of gas leakage compensating front and back and the follow-up voltage equivalence mentioned are transferred to corresponding base station.To complete data interaction subsequently through base station and remote server such as Cloud Server.Further, radio frequency units 14 can adopt data encryption algorithm to send data to improve security.
As shown in Figure 1, in the embodiment of the present invention, monitoring equipment also comprises the battery 16 of micro-control unit 11 power supply.
In addition, for improving battery, monitoring equipment of the present invention is also provided with direct current-direct current conversion unit 15 between micro-control unit 11 and battery 16.
Embodiment two
In the present invention, collection, the transmission of data can be real-time or periodic.For saving resource, the present invention can select periodic data acquisition, transmission mode.Such as flow sensor can gather a secondary data every 3 minor matters, or micro-control unit can every 6 hours to wireless radio frequency modules transmission primaries data.
Embodiment two is with the difference of embodiment one, and micro-control unit also adjusts the sense cycle of flow sensor and/or the cycle to wireless radio frequency modules transmission data for being specially the quantity of gas leakage after compensation according to quantity of gas leakage.
Such as when micro-control unit determine current gas leakage rate exceed the safety value of setting time, collection period shorten.Further, the safety value of multiple grade and the collection period of the different brackets corresponding with it can be set.
Again such as when micro-control unit determines current gas leakage rate lower than the threshold value set, collection period improves.Further, the threshold value of multiple grade and the collection period of the different brackets corresponding with it can be set.
Based on above-mentioned adjustment, can make in leakage rate comparatively large, when potential safety hazard is large, the leakage situation that understanding that can be more intensive is current, little in leakage rate, potential safety hazard hour, saving resource.
Embodiment three
Embodiment three is from the different of above-described embodiment, and micro-control unit detects battery status and adopts adaptive algorithm extending battery life.
Concrete, by the voltage of battery by after electric resistance partial pressure, being input to the ADC of micro-control unit, knowing the state of battery by measuring cell voltage.According to the discharge curve of battery, calculate the residual capacity of battery, afterwards by sampling and data transfer cycle according to battery remaining power and carry out dynamic conditioning.Residual capacity is divided into several grade, after residual capacity is decreased past classification thresholds, to sample and the cycle of uploading just increases a grade.
Micro-control unit of the present invention can select 32 single-chip microcomputers, has the features such as fast operation, the band low-power consumption mode of arousal function, port be abundant.Its concrete interface standard selected with the connection of wireless radio frequency modules is USART.The interface standard selected with the connection of sensor is IIC, and the output signal of flow sensor can be chosen as analog quantity or digital quantity as required.
In addition in the present invention, can also by remote server as cloud server be upgraded to monitoring equipment, less than equipment erecting stage firmware updating.
Embodiment four
The embodiment of the present invention four additionally provides a kind of Leakage Gas monitoring method based on radio communication, and be applied in above-mentioned monitoring equipment, as shown in Figure 2, monitoring method comprises:
S11, flow sensor detect the quantity of gas leakage at seal Leakage Gas mouth place and described quantity of gas leakage are sent to described micro-control unit;
S12, temperature sensor detect the temperature at described seal Leakage Gas mouth place and are sent to described micro-control unit;
S13, micro-control unit compensate described quantity of gas leakage according to described temperature, the quantity of gas leakage after being compensated;
The data received are transferred to corresponding base station by S14, wireless radio frequency modules.
Embody rule, described monitoring method also comprises:
Described micro-control unit adjusts the sense cycle of described flow sensor and/or the cycle to described wireless radio frequency modules transmission data according to described quantity of gas leakage.
Or in embody rule, described monitoring equipment also comprises the battery of powering for described micro-control unit; Described monitoring method also comprises:
Described micro-control unit detect described battery voltage and according to described Voltage Cortrol the sense cycle of flow sensor and/or the cycle to described wireless radio frequency modules transmission data.
In correspondence with each other, relevant portion can reference mutually for present device and method.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. based on a Leakage Gas monitoring equipment for radio communication, it is characterized in that, described monitoring equipment comprises:
Micro-control unit, the temperature sensor, flow sensor and the wireless radio frequency modules that are connected respectively with described micro-control unit;
Wherein, described flow sensor is for detecting the quantity of gas leakage at seal Leakage Gas mouth place;
Described temperature sensor is for detecting the temperature of environment residing for the equipment of described gas place;
Described micro-control unit is used for compensating described quantity of gas leakage according to described temperature, the quantity of gas leakage after being compensated;
Described wireless radio frequency modules is transferred to corresponding base station for the data received.
2. a kind of Leakage Gas monitoring equipment based on radio communication as claimed in claim 1, it is characterized in that, described micro-control unit is also for adjusting the sense cycle of described flow sensor and/or the cycle to described wireless radio frequency modules transmission data according to described quantity of gas leakage.
3. a kind of Leakage Gas monitoring equipment based on radio communication as claimed in claim 1, is characterized in that, described monitoring equipment also comprises the battery of powering for described micro-control unit; Described micro-control unit also for detect described battery voltage and according to described Voltage Cortrol the sense cycle of flow sensor and/or the cycle to described wireless radio frequency modules transmission data.
4. a kind of Leakage Gas monitoring equipment based on radio communication as claimed in claim 1, is characterized in that, described micro-control unit is connected with described wireless radio frequency modules by USART interface.
5. a kind of Leakage Gas monitoring equipment based on radio communication as claimed in claim 1, is characterized in that, described micro-control unit is connected with described sensor by IIC interface.
6. based on a Leakage Gas monitoring method for radio communication, be applied in the monitoring equipment described in any one of the claims 1-5, it is characterized in that, described monitoring method comprises:
Described flow sensor detects the quantity of gas leakage at seal Leakage Gas mouth place;
Described temperature sensor detects the temperature of environment residing for the equipment of described gas place;
Described micro-control unit compensates described quantity of gas leakage according to described temperature, the quantity of gas leakage after being compensated;
The data received are transferred to corresponding base station by described wireless radio frequency modules.
7. a kind of Leakage Gas monitoring method based on radio communication as claimed in claim 6, it is characterized in that, described monitoring method also comprises:
Described micro-control unit adjusts the sense cycle of described flow sensor and/or the cycle to described wireless radio frequency modules transmission data according to described quantity of gas leakage.
8. a kind of Leakage Gas monitoring method based on radio communication as claimed in claim 6, is characterized in that, described monitoring equipment also comprises the battery of powering for described micro-control unit; Described monitoring method also comprises:
Described micro-control unit detect described battery voltage and according to described Voltage Cortrol the sense cycle of flow sensor and/or the cycle to described wireless radio frequency modules transmission data.
9. a kind of Leakage Gas monitoring method based on radio communication as claimed in claim 6, is characterized in that, described micro-control unit is connected with described wireless radio frequency modules by USART interface.
10. a kind of Leakage Gas monitoring method based on radio communication as claimed in claim 6, is characterized in that, described micro-control unit is connected with described sensor by IIC interface.
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| CN201510583147.2A CN105203270A (en) | 2015-09-15 | 2015-09-15 | Gas leakage monitoring equipment and method based on wireless communication |
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Cited By (7)
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| CN106679768A (en) * | 2017-01-16 | 2017-05-17 | 慧感(上海)物联网科技有限公司 | Float switch type liquid leakage flow monitoring wireless acquisition terminal device |
| CN106679750A (en) * | 2017-01-16 | 2017-05-17 | 慧感(上海)物联网科技有限公司 | Siphonic liquid leakage rate monitoring wireless collecting terminal device |
| CN107960839A (en) * | 2016-10-20 | 2018-04-27 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus, flow control methods and volume control device |
| CN109458568A (en) * | 2018-12-13 | 2019-03-12 | 上海因士环保科技有限公司 | A kind of VOCs leakage miniature monitor and on-line monitoring system |
| CN109946420A (en) * | 2017-12-21 | 2019-06-28 | 智能城市网络有限公司 | For sending the device and method of atmospheric environment data |
| CN110672278A (en) * | 2019-10-16 | 2020-01-10 | 北京工业大学 | Method for quantitatively measuring VOCs leakage of production device based on infrared imaging |
| CN112710440A (en) * | 2020-12-21 | 2021-04-27 | 宁波旭升汽车技术股份有限公司 | Air detection machine leakage detection method with temperature compensation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106679750A (en) * | 2017-01-16 | 2017-05-17 | 慧感(上海)物联网科技有限公司 | Siphonic liquid leakage rate monitoring wireless collecting terminal device |
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| CN110672278A (en) * | 2019-10-16 | 2020-01-10 | 北京工业大学 | Method for quantitatively measuring VOCs leakage of production device based on infrared imaging |
| CN110672278B (en) * | 2019-10-16 | 2021-04-30 | 北京工业大学 | Method for quantitatively measuring VOCs leakage of production device based on infrared imaging |
| CN112710440A (en) * | 2020-12-21 | 2021-04-27 | 宁波旭升汽车技术股份有限公司 | Air detection machine leakage detection method with temperature compensation |
| CN112710440B (en) * | 2020-12-21 | 2022-12-27 | 宁波旭升集团股份有限公司 | Air detection machine leakage detection method with temperature compensation |
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