CN219996865U - Flow pressure control device applied to optical cavity ring-down system - Google Patents
Flow pressure control device applied to optical cavity ring-down system Download PDFInfo
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- CN219996865U CN219996865U CN202321025586.8U CN202321025586U CN219996865U CN 219996865 U CN219996865 U CN 219996865U CN 202321025586 U CN202321025586 U CN 202321025586U CN 219996865 U CN219996865 U CN 219996865U
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- proportional valve
- ring
- control device
- pressure control
- optical cavity
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- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000004611 spectroscopical analysis Methods 0.000 abstract 1
- 238000000180 cavity ring-down spectroscopy Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Control Of Fluid Pressure (AREA)
- Flow Control (AREA)
Abstract
The utility model relates to the technical field of ring-down spectroscopy of optical cavities, in particular to a flow pressure control device applied to a ring-down system of an optical cavity. According to the utility model, the opening and closing degree of the valve port can be steplessly regulated by regulating the magnitude of the input control current, so that the accurate control of flow and pressure is realized, and the high precision of equipment detection is ensured.
Description
Technical Field
The utility model relates to the technical field of cavity ring-down spectroscopy, in particular to a flow pressure control device applied to a cavity ring-down system.
Background
Currently, cavity ring-down spectroscopy (CRDS) is one of the main means for high-precision carbon emission detection, and CRDS is to measure the ring-down time of a light beam passing through an optical resonator to obtain the absorption laser spectrum information of a substance to be detected, wherein the temperature and pressure in the ring-down cavity are two main factors affecting gas absorption. In the laser spectrum technology, the pressure can influence the absorption linewidth and linewidth of the characteristic gas, if the detection accuracy of equipment is required to be ensured to be high, the system must be controlled in pressure, and in order to solve the problem, we propose a flow pressure control device applied to an optical cavity ring-down system.
Disclosure of Invention
The utility model aims to solve the defect that the pressure control cannot be performed on a system in the prior art, and provides a flow pressure control device applied to an optical cavity ring-down system.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a flow pressure control device for optical cavity ring-down system, includes ring-down cavity, the intercommunication is provided with air inlet proportional valve and gas outlet proportional valve on the ring-down cavity, the intercommunication is provided with the aspiration pump on the gas outlet proportional valve, install flowmeter and manometer on the ring-down cavity inner wall, air inlet proportional valve, gas outlet proportional valve, flowmeter, manometer are connected with the mainboard circuit through the wire.
Preferably, the main board circuit comprises a central processing unit, an LED display module, a USB communication module and a constant current driving module, wherein the LED display module, the USB communication module and the constant current driving module are in signal connection with the central processing unit, the constant current driving module is electrically connected with the air inlet proportional valve and the air outlet proportional valve, and the central processing unit is in signal connection with the flowmeter and the pressure gauge.
Preferably, the air pump is a vacuum pump.
The flow pressure control device applied to the cavity ring-down system has the beneficial effects that: the opening and closing degree of the valve port can be adjusted steplessly by adjusting the size of the input control current, so that the accurate control of flow and pressure is realized, and the high detection precision of equipment is ensured.
Drawings
FIG. 1 is a schematic diagram of a flow pressure control device for an optical cavity ring-down system according to the present utility model;
fig. 2 is a system block diagram of a motherboard circuit of a flow pressure control device applied to an optical cavity ring-down system according to the present utility model.
In the figure: the device comprises an air inlet proportional valve 1, a ring-down cavity 2, a main board circuit 3, an air outlet proportional valve 4, a flowmeter 5, a pressure gauge 6 and an air pump 7.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-2, a flow pressure control device applied to an optical cavity ring-down system comprises a ring-down cavity 2, wherein an air inlet proportional valve 1 and an air outlet proportional valve 4 are arranged on the ring-down cavity 2 in a communicating manner, and are respectively arranged at an air inlet and an air outlet of the ring-down cavity to serve as an execution unit.
The air outlet proportional valve 4 is communicated with an air pump 7, the air pump 7 is a vacuum pump, the inner wall of the ring-down cavity 2 is provided with a flowmeter 5 and a pressure gauge 6, the flowmeter 5 and the pressure gauge 6 are used as feedback units, the air inlet proportional valve 1, the air outlet proportional valve 4, the flowmeter 5 and the pressure gauge 6 are connected with a main board circuit 3 through wires, and the main board circuit 3 is used as a control unit. The air pump is used for exhausting air at the air outlet, because of the normally closed characteristic of the proportional valve, when the control unit does not act, the air outlet proportional valve 4 is in an approximate vacuum state to the air pump end, the ring-down cavity 2 is in a normal pressure state, and the main control circuit 3 adjusts the opening and closing degree of the proportional valve of the air inlet and the air outlet in real time according to the pressure gauge 6 and the flowmeter 5 in the ring-down cavity 2, so that the purposes of controlling the pressure and the flow in the ring-down cavity 2 are achieved, wherein the air inlet proportional valve 1 is responsible for flow regulation, the air outlet proportional valve 4 is responsible for pressure regulation, the pressure cannot be suddenly changed in order to ensure the stability of the ring-down cavity 2, and the pressure change needs to be controlled at 50 pa/s.
The air inlet proportional valve 1 and the air outlet proportional valve 4 are EVP series proportional valves of the brand of CLIPPARD, and the opening and closing degree of the valve ports can be adjusted steplessly by adjusting the magnitude of the input control current by the proportional valves, so that the accurate control of flow and pressure is realized.
The main board circuit 3 comprises a central processing unit, an LED display module, a USB communication module and a constant current driving module, wherein the LED display module, the USB communication module and the constant current driving module are in signal connection with the central processing unit, the constant current driving module is electrically connected with the air inlet proportional valve 1 and the air outlet proportional valve 4, the central processing unit is in signal connection with the flowmeter 5 and the pressure gauge 6, the air inlet proportional valve 1 and the air outlet proportional valve 4 are controlled through the constant current driving module, the central processing unit collects data of the pressure gauge 6 and the flowmeter 5 in real time, and output quantity is given to the constant current driving module through a PID control algorithm to drive the proportional valve to control flow and pressure.
When the device is powered on, the air pump starts to work, the pipeline is subjected to air extraction operation, the main control circuit 3 firstly preheats the air inlet proportional valve 1 and the air outlet proportional valve 4, after the preheating is finished, the data of the pressure gauge 6 in the ring-down cavity 2 is acquired, the air outlet proportional valve 4 is further set to adjust the pressure to control the pressure, after the pressure is controlled to the target value, the air inlet proportional valve 1 is controlled to control the flow, the flow is realized, and the pressure is accurately controlled, so that the high detection precision of the device is ensured.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (3)
1. The utility model provides a be applied to flow pressure control device of optical cavity ring-down system, includes ring-down chamber (2), its characterized in that, the intercommunication is provided with air inlet proportional valve (1) and gas outlet proportional valve (4) on ring-down chamber (2), the intercommunication is provided with aspiration pump (7) on gas outlet proportional valve (4), install flowmeter (5) and manometer (6) on ring-down chamber (2) inner wall, air inlet proportional valve (1), gas outlet proportional valve (4), flowmeter (5), manometer (6) are connected with main board circuit (3) through the wire.
2. The flow pressure control device applied to the optical cavity ring-down system according to claim 1, wherein the main board circuit (3) comprises a central processing unit, an LED display module, a USB communication module and a constant current driving module, the LED display module, the USB communication module and the constant current driving module are in signal connection with the central processing unit, the constant current driving module is in electric connection with the air inlet proportional valve (1) and the air outlet proportional valve (4), and the central processing unit is in signal connection with the flowmeter (5) and the pressure gauge (6).
3. Flow pressure control device for optical cavity ring-down system according to claim 1, characterized in that the suction pump (7) is a vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321025586.8U CN219996865U (en) | 2023-05-04 | 2023-05-04 | Flow pressure control device applied to optical cavity ring-down system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321025586.8U CN219996865U (en) | 2023-05-04 | 2023-05-04 | Flow pressure control device applied to optical cavity ring-down system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219996865U true CN219996865U (en) | 2023-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321025586.8U Active CN219996865U (en) | 2023-05-04 | 2023-05-04 | Flow pressure control device applied to optical cavity ring-down system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219996865U (en) |
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2023
- 2023-05-04 CN CN202321025586.8U patent/CN219996865U/en active Active
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