CN103293032A - Atmospheric sampling system with real-time temperature and flow control function - Google Patents
Atmospheric sampling system with real-time temperature and flow control function Download PDFInfo
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- CN103293032A CN103293032A CN2013101985129A CN201310198512A CN103293032A CN 103293032 A CN103293032 A CN 103293032A CN 2013101985129 A CN2013101985129 A CN 2013101985129A CN 201310198512 A CN201310198512 A CN 201310198512A CN 103293032 A CN103293032 A CN 103293032A
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Abstract
The invention discloses an atmospheric sampling system with a real-time temperature and flow control function. The atmospheric sampling system comprises a sealable storage cabin for storing an absorption bottle, air extraction equipment for providing an air source for the absorption bottle in the atmospheric sampling system with the real-time temperature and flow control function, a real-time control system electrically connected with the air extraction equipment and used for controlling the working power of the air extraction equipment, and a temperature control system for controlling the temperature in the storage cabin. The atmospheric sampling system with the real-time temperature and flow control function can be used for controlling the sampling temperature and the air flow in real time.
Description
Technical field
The present invention relates to a kind of atmospheric sampling device field, relate in particular to and a kind ofly can control the real-time control temperature of sample temperature and gas flow and the atmospheric sampling system of flow in real time.
Background technology
Atmospheric sampling is the process of gathering pollutant sample in the atmosphere or contaminated air sample.The spot sampling method has two classes: a class is to make a large amount of air by liquid-absorbant or solid adsorbent, and the enriching pollutants that concentration in the atmosphere is lower gets up, as degassing method, filter membrane method.Another kind of is the air that contains pollutant with container (vial, polybag etc.) collection.What the former recorded is the mean concentration of pollutant in the interior atmosphere of sampling time; What the latter recorded is instantaneous concentration or interior mean concentration of short time.The mode of sampling should be decided according to purpose and the field condition of sampling.Institute's sample thief should be representative.It is high that sampling efficiency is wanted, and operation must be easy, and be convenient to carry out assay determination subsequently, to obtain the master data of reliable atmospheric pollution.Gather the sample of pollutant in the atmosphere or the sample of contaminated air, in the hope of obtaining the master data of atmospheric pollution.
Atmospheric sampling is the important step of atmosphere environment supervision, and is very big for the reliability relation of Monitoring Data.Gather the method for atmospheric sample, mainly contain two classes: a class is to make a large amount of air by liquid-absorbant or solid adsorbent, to absorb or the detention pollutant, the lower enriching pollutants of concentration in the original atmosphere is got up, as degassing method, filter membrane method.The result who records with these class methods is the mean concentration of pollutant in the atmosphere in the sampling time.Another kind of is the air that contains pollutant with container (vial, polybag, rubber bladders, syringe etc.) collection.These class methods are applicable to following situation: the concentration of pollutant is higher in the atmosphere; Or the sensitivity of assay method is higher; Be difficult for being absorbed by liquid-absorbant or dusty gas and the steam of solid adsorbent absorption.The result who records with this method is the instantaneous concentration of pollutant in the atmosphere or the mean concentration in the short time.In addition, also have low-temperature freezing, can be used for gathering escaping gas and steam, as alkyl lead.Liquid-absorbant in the sampling thief is mainly used in absorbing gaseous state and steam-like material.Absorbing agent commonly used has: water, compound water solution, organic solvent etc.Chemical reaction must take place fast with pollutant or can promptly dissolve pollutant in absorbing agent, and is convenient to carry out analysis operation.For example airborne hydrogen fluoride, hydrogen chloride available water are as absorbing agent; Sulphuric dioxide can be with tetrachloro mercury sodium as absorbing agent; Thimet (3911), demeton organophosphorus pesticides such as (1059) can be with 5% methyl alcohol as absorbing agents etc.Solid adsorbent has two kinds in granular adsorption agent and fibrous adsorbent.Granular adsorption agent commonly used has silica gel, unglazed pottery etc., is used for the sampling of gaseous state, steam-like and particle.Fibrous adsorbent has filter paper, filter membrane, absorbent cotton, glass wool etc., and suction-operated mainly is the detention of physical property, is used for gathering particle.Sometimes adsorbent is earlier with certain chemical reagent dip treating, makes pollutant with its generation chemical action and is adsorbed, and is mainly used in gathering gaseous state or steam-like pollutant.
Atmospheric sampling will be selected suitable sample mode according to purpose and the field condition of sampling.As continuous or instantaneous sampling, in ground grab sampling or the sampling of flowing, sample in the air with balloon, aircraft, and environment sampling, indoor sampling and pollution source sampling etc.The sampling purpose is different with sample mode, and the used method of sampling and sampling thief are also different.As chimney endoparticle thing sampling, can be according to the chimney shape, highly, the punching of selected appropriate location is stretched into the gatherer of sampling thief in the hole, with the collection of bleeding of speed such as power such as grade.This method is called the isokinetic sampling method.
The sample that atmospheric sampling is gathered should be representative.It is high that the efficient of sampling is wanted, and operation must be easy, and the chemical analysis of being convenient to carry out is subsequently measured.The representational factor that influences sample has the efficient of sampling thief and absorbing agent, and the position of sampled point and sampling thief are to interference of air-flow etc.
In recent years, the atmospheric sampling technology combines with analysis and testing technology just gradually, constitute a kind ofly can sample continuously and automatically, the device of assay determination, record measured result.This device can directly carry out field monitoring, is called monitoring analyzer.
Air sampler plays a good role for the detection of harmful gas in air and the environment.Along with continuous progress in science and technology, air sampler also is constantly to release new product, as: intelligent type atmospheric sampling thief, explosion-proof air sampler, two gas circuit air samplers etc. product has greatly enriched the classification of air sampler.
In the atmospheric sampling field, in different regions, the temperature contrast in area may be bigger, for example the north winter cold weather, perhaps in southern area summer extremely hot weather, sample devices is unfavorable for that the absorption liquid in the absorption bottle carries out best absorption to the gas of being adopted owing to be subjected to the influence of low temperature or high temperature, has directly caused the degree of accuracy of subsequent chemical analysis.Simultaneously, in the time-sharing automatic sampling process of unattended many positions in storehouse, absorption liquid in the absorption bottle that the needs finished of having sampled are preserved, if be in high temperature, the target chemical matter that can feasible absorb, part is wherein arranged to evaporate into again in the environment than fast speeds, also cause influencing subsequent chemical analysis result's degree of accuracy.
Do not have a kind of many positions in storehouse in the existing sample devices, the bimodulus sampling, can control sample temperature and gas flow in real time, absorption liquid and sample gas temperature in the time of can controlling sampling, make it be in the optimal absorption temperature, can turn down the absorption liquid temperature and make it be in cold temperature state before the sampling and after the sampling, after reducing absorption liquid to greatest extent and absorbing again to 24 hours unattended real-time control temperature of environment volatilization and the atmospheric sampling system of flow.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can control the real-time control temperature of sample temperature and gas flow and the atmospheric sampling system of flow in real time.
To achieve these goals, technical scheme of the present invention is: the atmospheric sampling system of a kind of real-time control temperature and flow is provided, comprises:
The sealable storage cabin that is used for the storage absorption bottle;
Be used to the intrasystem absorption bottle of atmospheric sampling of described real-time control temperature and flow that the air-extractor of source of the gas is provided;
Electrically connect with described air-extractor, and for the real-time control system that the operating power of described air-extractor is controlled; And
For the temperature control system that the temperature in the described storage cabin is controlled.
Described temperature control system comprises:
Be used for the PID regulator that the paired pulses modulating unit transmits control signal;
Be used for receiving the control signal generation pulse width modulating signal of described PID regulator and/or the pulse modulation unit of pulse frequency modulated signal;
Be used for the power cell that received pulse bandwidth modulation signals and/or pulse frequency modulated signal increase or reduce refrigeration work consumption; And
For the refrigeration unit that freezes according to the watt level information of described power cell output.
Described temperature control system also comprises temperature feedback system, and described temperature feedback system comprises:
For detection of temperature height in the described storage cabin, and the information of described temperature height is converted into the temperature sensing unit of digital level;
Electrically connect with described temperature sensing unit, and will be mingled with the damping anti-interference unit that the described digital level of 3 subharmonic, 7 subharmonic, 11 subharmonic carries out impedance matching processing and difference anti-interference transmission process;
Electrically connect with described damping anti-interference unit, be used for the output of described damping anti-interference unit is converted into the digital filtering unit that complete stable digital signal feeds back to described temperature control system.
Described damping anti-interference unit comprises:
Be used for described digital signal level is carried out the impedance matching unit that impedance matching is handled;
Be electrically connected at after the described impedance matching unit, and described digital signal level carried out the difference anti-interference transmission processing unit of difference anti-interference transmission process.
Described real-time control system comprises the flow detection unit, also be provided with the gas circuit selected cell between described air-extractor and the described absorption bottle, described flow detection unit is connected between described gas circuit selected cell and the described real-time control system, for detection of the information that enters the gas flow size in the described absorption bottle, and feed back to described real-time control system, and then increase or reduce the operating power of described air-extractor.
The atmospheric sampling system of described real-time control temperature and flow also is provided with environment temperature detecting unit and ambient atmosphere pressure detecting unit, and described temperature detecting unit and atmospheric pressure detecting unit and described enforcement control system electrically connect.
The atmospheric sampling system of described real-time control temperature and flow also comprises operating unit and display unit, and described operating unit and display unit and described enforcement control system electrically connect.
Be provided with the communication unit that communicates for to described real-time control system and temperature control system between described real-time control system and the temperature control system.
Described communication unit is the SCI communication unit.
Described air-extractor is made up of several air pumps.
Described temperature control system also comprises the heating unit that is arranged on described storage cabin inside and described storage cabin is heated.
Described heating unit and described power cell electrically connect, and according to the watt level information of described power cell output described storage cabin are heated.
Compared with prior art, owing to control in real time in the atmospheric sampling system of temperature and flow in the present invention, described absorption bottle is loaded with the solvent of the gas reaction of sampling with needs in advance and is placed in the described storage cabin, and can also control described refrigeration unit by described temperature control system freezes for described storage cabin and keeps this preset temperature according to default sample temperature, the atmospheric sampling system of described real-time control temperature and flow can also control the information that enters the gas flow size in the described absorption bottle in real time with described real-time control system in addition, the gas flow that so can guarantee to enter in the described absorption bottle is consistent with predefined gas flow size, so the present invention a kind ofly can control the real-time control temperature of sample temperature and gas flow and the atmospheric sampling system of flow in real time.
By following description also by reference to the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used for explaining embodiments of the invention.
Description of drawings
Fig. 1 controls the structural representation of an embodiment of the atmospheric sampling system of temperature and flow in real time for the present invention.
Fig. 2 real-time control temperature as shown in Figure 1 and the circuit theory module map of the atmospheric sampling system of flow.
Fig. 3 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-1 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 4 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-2 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 5 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-3 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 6 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-4 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 7 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-5 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 8 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of A group-6 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Fig. 9 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-1 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Figure 10 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-2 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Figure 11 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-3 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Figure 12 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-4 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Figure 13 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-5 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Figure 14 is sample coordinate synoptic diagram with cold preservation state of the absorption liquid in the absorption bottle of B group-6 for sequence number in the atmospheric sampling system of as shown in Figure 1 real-time control temperature and flow.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label represents similar elements in the accompanying drawing.As mentioned above, shown in Fig. 1 and 2:
The atmospheric sampling system 100 of a kind of real-time control temperature and flow is provided, comprises:
The sealable storage cabin 10 that is used for the storage absorption bottle;
Be used to absorption bottles in the atmospheric sampling system 100 of described real-time control temperature and flow that the air-extractor 20 of source of the gas is provided;
Electrically connect with described air-extractor 20, and for the real-time control system 30 that the operating power of described air-extractor 20 is controlled; And for the temperature control system 40 that the temperature in the described storage cabin 10 are controlled.Described temperature control system 40 comprises: be used for the PID regulator 42 that paired pulses modulating unit 41 transmits control signal; Be used for receiving the control signal generation pulse width modulating signal of described PID regulator 42 and/or the pulse modulation unit 41 of pulse frequency modulated signal, described pulse modulation unit 41 comprises pwm unit 410 and pulse frequency modulation unit 411; Be used for the power cell 44 that received pulse bandwidth modulation signals and/or pulse frequency modulated signal increase or reduce refrigeration work consumption; And for the refrigeration unit 45 that freezes according to the watt level information of described power cell 44 outputs, refrigeration unit 45 as shown in Figure 2 is divided into A group refrigeration unit 45a and B group refrigeration unit 45b, and described refrigeration unit 45 can be that semiconductor chilling plate, external frozen water or external cold wind freeze.
As shown in Figure 2, described temperature control system 40 also comprises temperature feedback system 46, and described temperature feedback system 46 comprises:
For detection of temperature height in the described storage cabin 10, and the information of described temperature height is converted into the temperature sensing unit 461 of current signal power, described temperature sensing unit 461 is arranged on the inside of described storage cabin 10, and the temperature in the described storage cabin 10 is detected; Electrically connect with described temperature sensing unit 461, and the damping anti-interference unit 462 that described current signal is carried out impedance matching processing and difference anti-interference transmission process; Described damping anti-interference unit 462 comprises: be used for described current signal is carried out the impedance matching unit 4621 that impedance matching is handled; Be electrically connected at after the described impedance matching unit 4621, and described current signal carried out the difference anti-interference transmission processing unit 4622 of difference anti-interference transmission process.
Electrically connect with described damping anti-interference unit 462, be used for the output of described damping anti-interference unit 462 is converted into the digital filtering unit 463 that digital signal feeds back to described temperature control system 40, among the embodiment as shown in Figure 2, described digital filtering unit 463 is to be integrated into described temperature control system 40 inside.In actual design, described digital filtering unit 463 can be integrated into described temperature control system 40 inside, also as required independent setting outside described temperature control system 40.
Described real-time control system 30 comprises flow detection unit 31, also be provided with gas circuit selected cell 50 between described air-extractor 20 and the described absorption bottle, described flow detection unit 31 is connected between described gas circuit selected cell 50 and the described real-time control system 30, for detection of the information that enters the gas flow size in the described absorption bottle, and feed back to described real-time control system 30, and then increase or reduce the operating power of described air-extractor 20, the quantity of described gas circuit selected cell 50 is that the quantity of the air pump that comprises according to described air-extractor 20 arranges, detect by the 31 pairs of gas flows that enter in the absorption bottle in described flow detection unit, and feed back to described real-time control system 30, carry out FEEDBACK CONTROL.
The atmospheric sampling system 100 of described real-time control temperature and flow also is provided with environment temperature detecting unit 60a and ambient atmosphere pressure detecting unit 60b, and described temperature detecting unit 60a and atmospheric pressure detecting unit 60b and described enforcement control system 30 electrically connect.
The atmospheric sampling system 100 of described real-time control temperature and flow also comprises operating unit 70a and display unit 70b, described operating unit 70a and display unit 70b and described enforcement control system 30 electrically connect, the duty of the described real-time control temperature of demonstration that described display unit 70b can be real-time and the atmospheric sampling system 100 of flow, the sample collector is by the atmospheric sampling system 100 input sample information of described operating unit 70a to described real-time control temperature and flow, allows the atmospheric sampling system 100 of described real-time control temperature and flow according to the sample information work of input.
Be provided with the communication unit 80 that communicates for to described real-time control system 30 and temperature control system 40 between described real-time control system 30 and the temperature control system 40.
Described communication unit 80 is the SCI communication unit.
Described air-extractor 20 is made up of several air pumps, and among the embodiment as shown in Figure 2, described air-extractor 20 is made up of two air pumps, and the quantity of air pump can add or reduce according to actual needs.
Described temperature control system 40 also comprises the heating unit 47 that is arranged on described storage cabin 10 inside and described storage cabin 10 is heated.Described heating unit 47 can be infrared heating device, resistive heating device, external hot blast/type of heating such as hot water heating.
Described heating unit 47 electrically connects with described power cell 44, and according to the watt level information of described power cell 44 outputs described storage cabin 10 is heated.The mode of operation of the mode of operation of described heating unit 47 and described refrigeration unit 45 is similar, is equally to carry out FEEDBACK CONTROL by 46 pairs of temperature of described feedback system.
Before the atmospheric sampling system 100 that the present invention controls temperature and flow in real time starts working, the sample collector can preestablish the temperature in the described storage cabin 10 according to the temperature of the residing environment of equipment, heat up or lower the temperature, described temperature control system 40, can heat by 47 pairs of described storage cabins 10 of the described power cell 44 described heating units of control, perhaps freeze by 45 pairs of described storage cabins 10 of described refrigeration unit, described temperature feedback system 46 then feeds back in the described temperature control system 40 temperature in the described storage cabin 10, temperature in the described storage cabin 10 is carried out FEEDBACK CONTROL, to cooperate the absorption liquid in the described absorption bottle gas of being sampled is reached best assimilation effect.
Among the embodiment shown in Fig. 3-14, atmospheric sampling system 100 inside that the present invention controls temperature and flow in real time are provided with 6 absorption bottles of A group and 6 absorption bottles of B group, absorption liquid in totally 12 absorption bottles is sampled and the coordinate synoptic diagram of cold preservation state, for the present invention controls the atmospheric sampling system 100 of temperature and flow in real time when sampling, absorption liquid in six absorption bottles wherein carries out sample states and is in the coordinate synoptic diagram of cold preservation state, in the coordinate synoptic diagram shown in Fig. 3-14, ordinate is the temperature of sampling, unit is degree centigrade, and horizontal ordinate is the sampling time, unit is minute, from the figure as can be seen, the curve of coordinate diagram is 6 absorption bottles of A group and 6 synoptic diagram that absorption bottle is sampled of B group, from the figure as can be seen, No. 1 absorption bottle is in the time of the 37th minute, begin to sample and heat, be 5 to rise to 25 degrees centigrade and probably need 2 minutes from temperature, this moment, remaining absorption bottle insulation was 5 degree, when the time near 55 minutes, the headpin sampling finishes, headpin begins cooling and gets back to keeping warm mode then, temperature drops to 5 degree from 25 degree, the time of sampling is probably controlled about 15 minutes, and the absorption liquid in other the absorption bottle is similar with the situation of A group-headpin in the temperature of sampling and the temperature of preservation.It can also be seen that from Fig. 3-14 when sampling, in the process that temperature rises, temperature can surpass the sampled point that arranges, during decline, cooling again after temperature also can slightly rise, this is exactly that transmitting afterwards of temperature caused.In the practical application, the interval that absorption bottle is sampled can also be set to more lack, the sampling of A group-headpin is finished even is not finished, and just can allow described enforcement control system 30 other numbers of control absorption bottles sample, and mode of operation can arrange according to actual conditions.Described enforcement control system 30 can select to allow any one or several absorption bottle among A group or the B group sample by described gas circuit selected cell 50, and can control convenient sampling or preservation by the temperature of described refrigeration unit 45 or 47 pairs of absorption bottles of heating unit.
Arrange a plurality of for the cylinder of placing absorption bottle in the described storage cabin 10, be provided with described refrigeration unit 45 and heating unit 47 in each cylinder, therefore just allow the interior temperature of 40 pairs of described cylinders of described temperature control system adjust, make the temperature in the described cylinder be adjusted to the temperature that is fit to sampling, and wait to sample when finishing, 30 of described real-time control systems can be reselected by described gas circuit selected cell 50 and need the absorption bottle of sampling to sample, also can readjust by the temperature in 40 pairs of described cylinders of described temperature control system simultaneously, make described flexible interior temperature adapt to described absorption liquid and preserve the material that absorbs, thereby be conducive to improve widely the degree of accuracy of sampling.
The advantage that the present invention controls the atmospheric sampling system 100 of temperature and flow in real time is: be implemented under the varying environment temperature conditions, for example high temperature 50 to subzero 30 degree centigrade of scopes Celsius, absorption bottle in the described storage cabin 10 of device interior, temperature during its sampling can be by carrying out programming Control in advance to real-time control system 40, guarantee that absorption liquid is when absorbing the different target material, be in best absorption temperature, and generally, the absorption temperature of absorption liquid the best is that 15 degree Celsius are to 25 degree Celsius, because the temperature of sampling has certain difference with the environment temperature in the external world, particularly at the extremely cold weather of north of china in winter, perhaps summer heat weather in, the temperature of the absorption liquid in 40 pairs of described storage cabins 10 of the described temperature control system of needs heats up or lowers the temperature, and be not subjected to the influence of environment temperature, and after absorption liquid is finished the absorption operation, the atmospheric sampling system 100 of described real-time control temperature and flow can turn down temperature to the absorption liquid hold mode, reducing to greatest extent stress absorbed target substance, again evaporate in the environment, and can deposit a plurality of similar and different absorption bottles that absorb night that are equipped with in the described storage cabin 10, by solenoid valve absorption bottle is carried out multi-channel sampling, improve the accuracy of sampled data, also can improve the work efficiency of sampling and reduction sample collector's working strength and time.
In conjunction with Fig. 1-14, owing to control in real time in the atmospheric sampling system 100 of temperature and flow in the present invention, described absorption bottle is loaded with the solvent of the gas reaction of sampling with needs in advance and is placed in the described storage cabin 10, and can also control described refrigeration unit 45 by described temperature control system 40 freezes for described storage cabin 10 and keeps this preset temperature according to default sample temperature, the atmospheric sampling system 100 of described real-time control temperature and flow can also control in real time with the information that 30 pairs of described real-time control systems enter the gas flow size in the described absorption bottle in addition, the gas flow that so can guarantee to enter in the described absorption bottle is consistent with predefined gas flow size, so the present invention a kind ofly can control the real-time control temperature of sample temperature and gas flow and the atmospheric sampling system of flow in real time.
Above disclosed only is the preferred embodiments of the present invention, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to the present patent application claim still belongs to the scope that the present invention is contained.
Claims (12)
1. an atmospheric sampling system that controls temperature and flow in real time is characterized in that, comprising:
The sealable storage cabin that is used for the storage absorption bottle;
Be used to the intrasystem absorption bottle of atmospheric sampling of described real-time control temperature and flow that the air-extractor of source of the gas is provided;
Electrically connect with described air-extractor, and for the real-time control system that the operating power of described air-extractor is controlled; And
For the temperature control system that the temperature in the described storage cabin is controlled.
2. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow is characterized in that described temperature control system comprises:
Be used for the PID regulator that the paired pulses modulating unit transmits control signal;
Be used for receiving the control signal generation pulse width modulating signal of described PID regulator and/or the pulse modulation unit of pulse frequency modulated signal;
Be used for the power cell that received pulse bandwidth modulation signals and/or pulse frequency modulated signal increase or reduce refrigeration work consumption; And
For the refrigeration unit that freezes according to the watt level information of described power cell output.
3. the atmospheric sampling system of real-time control temperature as claimed in claim 2 and flow is characterized in that described temperature control system also comprises temperature feedback system, and described temperature feedback system comprises:
For detection of temperature height in the described storage cabin, and the information of described temperature height is converted into the temperature sensing unit of digital level;
Electrically connect with described temperature sensing unit, and will be mingled with the damping anti-interference unit that the described digital level of 3 subharmonic, 7 subharmonic, 11 subharmonic carries out impedance matching processing and difference anti-interference transmission process;
Electrically connect with described damping anti-interference unit, be used for the output of described damping anti-interference unit is converted into the digital filtering unit that complete stable digital signal feeds back to described temperature control system.
4. the atmospheric sampling system of real-time control temperature as claimed in claim 3 and flow is characterized in that, described damping anti-interference unit comprises:
Be used for described digital signal level is carried out the impedance matching unit that impedance matching is handled;
Be electrically connected at after the described impedance matching unit, and described digital signal level carried out the difference anti-interference transmission processing unit of difference anti-interference transmission process.
5. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow, it is characterized in that, described real-time control system comprises the flow detection unit, also be provided with the gas circuit selected cell between described air-extractor and the described absorption bottle, described flow detection unit is connected between described gas circuit selected cell and the described real-time control system, for detection of the information that enters the gas flow size in the described absorption bottle, and feed back to described real-time control system, and then increase or reduce the operating power of described air-extractor.
6. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow, it is characterized in that, the atmospheric sampling system of described real-time control temperature and flow also is provided with environment temperature detecting unit and ambient atmosphere pressure detecting unit, and described temperature detecting unit and atmospheric pressure detecting unit and described enforcement control system electrically connect.
7. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow, it is characterized in that, the atmospheric sampling system of described real-time control temperature and flow also comprises operating unit and display unit, and described operating unit and display unit and described enforcement control system electrically connect.
8. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow is characterized in that, is provided with the communication unit that communicates for to described real-time control system and temperature control system between described real-time control system and the temperature control system.
9. the atmospheric sampling system of real-time control temperature as claimed in claim 8 and flow is characterized in that, described communication unit is the SCI communication unit.
10. the atmospheric sampling system of real-time control temperature as claimed in claim 1 and flow is characterized in that described air-extractor is made up of several air pumps.
11. the atmospheric sampling system of real-time control temperature as claimed in claim 3 and flow is characterized in that, described temperature control system also comprises the heating unit that is arranged on described storage cabin inside and described storage cabin is heated.
12. the atmospheric sampling system of real-time control temperature as claimed in claim 11 and flow is characterized in that, described heating unit and described power cell electrically connect, and according to the watt level information of described power cell output described storage cabin are heated.
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| CN108663297A (en) * | 2018-06-20 | 2018-10-16 | 暨南大学 | Atmospheric particulates sample lines integrate quality control system |
| CN109916679A (en) * | 2019-03-27 | 2019-06-21 | 深圳国技仪器有限公司 | Flue gas sampling pipe and flue-gas treater with thermostatic control system |
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| CN109946125A (en) * | 2019-04-28 | 2019-06-28 | 深圳国技仪器有限公司 | Measurement with wet gas temperature and humidity sampling apparatus |
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