CN215953132U - Atmospheric constant-current sampling device - Google Patents
Atmospheric constant-current sampling device Download PDFInfo
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- CN215953132U CN215953132U CN202122080275.9U CN202122080275U CN215953132U CN 215953132 U CN215953132 U CN 215953132U CN 202122080275 U CN202122080275 U CN 202122080275U CN 215953132 U CN215953132 U CN 215953132U
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Abstract
The utility model relates to the technical field of environmental protection detection, and provides an atmospheric constant-current sampling device which comprises a sampling unit, wherein the sampling unit is connected with a constant-current stable control device, and the constant-current stable control device comprises a filtering unit, a drying bottle, a flow sensor for measuring airflow and a high-negative-pressure air pump, wherein the filtering unit is used for removing impurities in gas collected by the sampling unit, the drying bottle is used for preventing liquid from flowing back and absorbing, and the high-negative-pressure air pump are sequentially connected; the flow sensor and the air pump are both connected with a single chip microcomputer, so that the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor to realize constant-current sampling; the display screen is in communication connection with the single chip microcomputer. The single chip microcomputer intelligently controls the start and stop of atmospheric sampling according to preset system working parameters, and the rotating speed of the air pump is regulated and controlled in real time according to the air flow transmitted by the flow sensor, so that constant-flow sampling is realized, the detection error is greatly reduced, and the gas detection accuracy is effectively improved.
Description
Technical Field
The utility model relates to the technical field of environmental protection detection, in particular to an atmospheric constant-current sampling device.
Background
In recent years, with the rapid development of urban construction, large-scale house reconstruction is carried out vigorously, newly-decorated houses have more harmful gases, and as houses, offices and moving places, the environment quality directly influences the human health, so that indoor environment detection is inevitable as evaluation and supervision of engineering quality and decoration project acceptance, indoor environment evaluation and treatment become important components of indoor environment detection, the indoor environment detection is an important means for measuring the indoor environment quality, and detection equipment and detection conditions become the key for judging whether the detection result is accurate or not. In the prior art, a power air pump of the air flow sampler adopts a diaphragm piston pump, a diaphragm is pushed by air pressure to reciprocate to drive to do work so as to suck and discharge gas, and the gas passing through the piston pump is discontinuous, so that the pressure difference value acquired by a sensor is fluctuated, and the measurement error is large; meanwhile, the altitude is different, the sampling flow of the air suction pump under the same working power is different, the altitude is higher, the air is rarer, and the sampling flow is more stable than the plain working power, so that the sampling flow is easy to be unstable, and a device for collecting airflow and measuring the environment pollution condition accurately is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provides the atmospheric constant-current sampling device, and the filtering unit and the drying bottle which are sequentially connected are arranged in the constant-current stable control device, so that the sampling airflow is pure, and the measurement requirement can be met; a display screen with function keys is arranged on the outer wall of the constant-current stable control device, and the single chip microcomputer is in communication connection with the display screen, so that the display screen can display real-time working parameters; the functional keys are arranged on the display screen, system working parameters can be preset and stored in the single chip microcomputer, and the single chip microcomputer is connected with the flow sensor and the high-negative-pressure air pump, so that the single chip microcomputer intelligently controls the start and stop of atmospheric sampling according to the preset system working parameters, and the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor, so that constant-flow sampling is realized, the detection error is greatly reduced, and the gas detection precision is effectively improved.
The specific technical scheme provided by the utility model is as follows:
an atmosphere constant-current sampling device comprises a sampling unit, wherein the sampling unit is connected with a constant-current stability control device, and the constant-current stability control device comprises a filtering unit, a reverse liquid absorption prevention drying bottle, a flow sensor for measuring airflow and a high negative pressure air pump, which are sequentially connected, wherein the filtering unit is used for removing impurities in gas collected by the sampling unit; the flow sensor and the air pump are both connected with a single chip microcomputer, so that the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor to realize constant-current sampling; the display screen is in communication connection with the single chip microcomputer.
Preferably, the outer side wall of the constant current stable control device is provided with the display screen for human-computer interaction.
Furthermore, the display screen is also provided with function keys, system working parameters are set through the function keys, and the working parameters are stored in the single chip microcomputer.
Furthermore, a communication module is arranged in the display screen, and information is transmitted according to the communication connection between the communication module and the single chip microcomputer.
Further, the single chip microcomputer comprises a storage module, a communication module, a processing module and a control module, wherein the storage module is used for storing preset working parameters and real-time obtained working data; the processing module is used for processing sampling data according to preset requirements, and the control module is used for controlling the rotating speed of the air pump and data display of the display screen in real time.
Further, the preset working parameters stored by the storage module comprise sampling flow and sampling time; the method comprises the steps of storing real-time sampling time, sampling duration and accumulated volume data; the processing module is used for calculating a sampling flow value and a flow fluctuation value of an interval time period and obtaining the adjustment rotating speed of the air extracting pump through a filtering algorithm; the control module controls the air pump in real time according to the adjusting rotating speed so as to maintain the constant stability of the sampling air flow, control the display screen to display sampling data information in real time and control the initial time of sampling work.
Furthermore, a background lamp is arranged in the display screen, and a photosensitive sensor is arranged in the background lamp, so that the background lamp can work at night.
Further, the air pump comprises a low-noise high-negative pressure brushless diaphragm pump.
Preferably, the drying bottle is a long cylinder and is vertically arranged, and the gas inlet and the gas outlet are both positioned at the upper part of the drying bottle.
Preferably, a high-capacity lithium ion rechargeable battery is further included to maintain long-time continuous operation in the field.
The utility model has the beneficial effects that:
the utility model provides an atmosphere constant-current sampling device, which is characterized in that a filtering unit and a drying bottle which are sequentially connected are arranged in a constant-current stable control device, so that sampling airflow is pure, and the measurement requirement can be met. A display screen with function keys is arranged on the outer wall of the constant-current stable control device, and the single chip microcomputer is in communication connection with the display screen, so that the display screen can display real-time working parameters; the functional keys are arranged on the display screen, system working parameters can be preset and stored in the single chip microcomputer, and the single chip microcomputer is connected with the flow sensor and the high-negative-pressure air pump, so that the single chip microcomputer intelligently controls the start and stop of atmospheric sampling according to the preset system working parameters, and the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor, so that constant-flow sampling is realized, the detection error is greatly reduced, and the gas detection precision is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.
In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic diagram of the structure of the single chip microcomputer.
Wherein:
a sampling tube 1; a sample introduction joint 2; a filter 3; a pipe 4; a drying bottle 5; a flow sensor 6; a display screen 7; a function key 8; a backlight 9; a single chip microcomputer 10; a storage module 101, a communication module 102, a processing module 103, a control module 104, and a suction pump 11.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated; "plurality" means equal to or greater than two; the description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
As shown in fig. 1-2, the preferred embodiment of the present invention:
an atmospheric constant-current sampling device comprises a sampling tube 1 and a constant-current stable control device; the constant-current stable control device comprises a filter 3, a drying bottle 5, a flow sensor 6, an air pump 11 and a single chip microcomputer 10 which are connected through a connecting wire, wherein the single chip microcomputer 10 is in communication connection with a display screen 7. The filter 3 is connected with the sampling tube 1 through the sampling connector 2, so that sampling air flow enters through the sampling tube 1 and is discharged from an exhaust port of the air pump 11.
The filter 3 filters out impurities in the gas entering through the sampling tube 1.
Drying bottle 5 is long cylinder, vertical placing, and the gas that filters gets into through the air inlet that is located the top drying bottle 5, moisture in the gas is detained in drying bottle 5, gas flows out from the gas outlet that is located the upper portion, gets into in flow sensor 6.
The flow sensor 6 and the air pump 11 are both connected with a single chip microcomputer 10, and the single chip microcomputer 10 comprises a storage module 101, a communication module 102, a processing module 103 and a control module 104.
Preferably, the outer side wall of the constant current stable control device is provided with the display screen 7 for human-computer interaction.
Further, a function key 8 is further arranged on the display screen 7, system working parameters are set through the function key 8, and the working parameters are stored in the storage module 101 of the single chip microcomputer 10.
Further, the preset working parameters stored in the storage module 101 include sampling flow and sampling time; the method comprises the steps of storing real-time sampling time, sampling duration and accumulated volume data; the processing module 103 is used for calculating a sampling flow value and a flow fluctuation value of an interval time period and obtaining an adjusting rotating speed of the air pump through a filtering algorithm; the control module 104 controls the air pump 11 in real time according to the adjusted rotating speed to maintain the constant stability of the sampling air flow, controls the display screen 7 to display the sampling data information in real time, and controls the initial time of the sampling work.
The control module 104 operates according to a sampling flow and sampling time starting device preset in the storage module 101, the sampling tube 1 starts to adopt, airflow enters the flow sensor 6 after being filtered by the filter 3, the flow sensor 6 transmits a measured airflow volume value to the single chip microcomputer 10 to be stored in the storage module 101, the processing module 103 of the single chip microcomputer 10 controls the rotating speed of the air extracting pump 11 in real time according to a real-time flow value and a flow fluctuation value and the adjusted rotating speed of the air extracting pump 11 obtained through a filtering algorithm, and the control module 104 of the single chip microcomputer 10 controls the rotating speed of the air extracting pump 11 in real time to enable the air inlet flow of the sampling tube 1 to change in real time so as to realize constant-flow sampling. Meanwhile, the control module 104 transmits the sampling data information to the display screen 7 for data display through the communication module 102 in real time, so that a sampler can conveniently grasp the sampling information in real time.
When the sampling place is located in a high altitude area and the air pressure is low, the control module 104 of the single chip microcomputer 10 controls the rotating speed of the air extracting pump 11 in real time so as to realize constant-flow sampling and achieve the preset requirement.
When the preset requirement is met, the control module 104 of the single chip microcomputer 10 controls the device to shut down.
Furthermore, a communication module is arranged in the display screen 7, and information is transmitted according to the communication connection between the communication module and the single chip microcomputer 10.
Furthermore, a background lamp 9 is arranged in the display screen 7, and a photosensitive sensor is arranged in the background lamp 9, so that the background lamp 9 can work at night.
Further, the suction pump 11 includes a low-noise high-negative pressure brushless diaphragm pump.
Preferably, a high-capacity lithium ion rechargeable battery is further included to maintain long-time continuous operation in the field.
The beneficial effects are that:
the utility model provides an atmosphere constant-current sampling device, which is characterized in that a filtering unit and a drying bottle which are sequentially connected are arranged in a constant-current stable control device, so that sampling airflow is pure, and the measurement requirement can be met. A display screen with function keys is arranged on the outer wall of the constant-current stable control device, and the single chip microcomputer is in communication connection with the display screen, so that the display screen can display real-time working parameters; the functional keys are arranged on the display screen, system working parameters can be preset and stored in the single chip microcomputer, and the single chip microcomputer is connected with the flow sensor and the high-negative-pressure air pump, so that the single chip microcomputer intelligently controls the start and stop of atmospheric sampling according to the preset system working parameters, and the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor, so that constant-flow sampling is realized, the detection error is greatly reduced, and the gas detection precision is effectively improved.
The foregoing description shows and describes the preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (9)
1. The atmospheric constant-current sampling device comprises a sampling unit, and is characterized in that: the sampling unit is connected with a constant-current stable control device, and the constant-current stable control device comprises a filtering unit for removing impurities in the gas collected by the sampling unit, a drying bottle for preventing liquid from flowing back, a flow sensor for measuring airflow and a high-negative-pressure air pump which are sequentially connected; the flow sensor and the air pump are both connected with a single chip microcomputer, so that the single chip microcomputer regulates and controls the rotating speed of the air pump in real time according to the air flow transmitted by the flow sensor to realize constant-current sampling; the display screen is in communication connection with the single chip microcomputer.
2. The atmospheric constant-current sampling device according to claim 1, characterized in that: and the outer side wall of the constant current stable control device is provided with the display screen for human-computer interaction.
3. The atmospheric constant-current sampling device according to claim 2, characterized in that: and the display screen is also provided with function keys, system working parameters are set through the function keys, and the working parameters are stored in the single chip microcomputer.
4. The atmospheric constant-current sampling device according to claim 3, characterized in that: and a communication module is arranged in the display screen, and information is transmitted according to the communication connection between the communication module and the single chip microcomputer.
5. The atmospheric constant-current sampling device according to claim 4, characterized in that: the single chip microcomputer comprises a storage module, a communication module, a processing module and a control module, wherein the storage module is used for storing preset working parameters and real-time obtained working data; the processing module is used for processing sampling data according to preset requirements, and the control module is used for controlling the rotating speed of the air pump and data display of the display screen in real time.
6. The atmospheric constant-current sampling device of claim 5, wherein: the display screen is internally provided with a background lamp, and the background lamp is internally provided with a photosensitive sensor and can work at night.
7. The atmospheric constant-current sampling device of claim 5, wherein: the air pump comprises a brushless diaphragm pump with low noise and high negative pressure.
8. The atmospheric constant-current sampling device according to claim 1, characterized in that: the drying bottle is a long column body and is vertically placed, and an inlet and an outlet of gas are both positioned on the upper portion of the drying bottle.
9. The atmospheric constant-current sampling device according to claim 1, characterized in that: also comprises a high-capacity lithium ion rechargeable battery to maintain long-time continuous operation in the field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080275.9U CN215953132U (en) | 2021-08-31 | 2021-08-31 | Atmospheric constant-current sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080275.9U CN215953132U (en) | 2021-08-31 | 2021-08-31 | Atmospheric constant-current sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN215953132U true CN215953132U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122080275.9U Active CN215953132U (en) | 2021-08-31 | 2021-08-31 | Atmospheric constant-current sampling device |
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| CN (1) | CN215953132U (en) |
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2021
- 2021-08-31 CN CN202122080275.9U patent/CN215953132U/en active Active
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