CN204228601U - The pick-up unit of anesthesia gas concentration - Google Patents
The pick-up unit of anesthesia gas concentration Download PDFInfo
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- CN204228601U CN204228601U CN201420717449.5U CN201420717449U CN204228601U CN 204228601 U CN204228601 U CN 204228601U CN 201420717449 U CN201420717449 U CN 201420717449U CN 204228601 U CN204228601 U CN 204228601U
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Abstract
The utility model relates to a kind of pick-up unit of anesthesia gas concentration, comprise infrared light supply, collimation lens, chopping modulation device, detect air chamber, convergent lens, narrow wide infrared fileter, infrared eye, amplifying circuit and processes and displays device, wherein, be converted to directional light after the infrared light that infrared light supply is launched is transferred to collimation lens and be transferred to chopping modulation device, the Infrared that chopping modulation device beam-outlet end sends is transferred to detection air chamber, the Infrared detecting air chamber injection focuses on infrared eye by convergent lens, narrow wide infrared fileter has been laid in order to realize the selection of infrared band between convergent lens and infrared eye, the data-signal that infrared eye sends transfers to processes and displays device and calculates data to process after amplifying circuit amplifies, finally show the concentration of the anesthetic gases detected.The utility model can detect the concentration of anesthetic gases in diffusion type air chamber, simple to operate, easy to carry.
Description
Technical field
The utility model relates to a kind of pick-up unit of gas concentration, particularly relates to utilizing specific gas to the high phenomenon of specific wavelength infrared waves absorptivity to detect the device of anesthesia gas concentration.
Background technology
Current clinical conventional anesthetic gases has fluothane, Enflurane, Isoflurane and Sevoflurane etc., anesthetic gases sucks in patient body by pipeline after Anesthesia machine heating, then excrete with prototype, if the leakage of operating room generation anesthetic gases in the process, meeting serious harm is to the health status of medical worker.Anesthetic gases in vivo accumulation can cause the change of behavior at heart and chronic genetic change (comprise sudden change, teratogenesis, carcinogenic), and short burst is exposed in anesthetic gases, can cause drowsiness, tired, in congenital malformation, infertile, even cancer.Therefore the monitoring of indoor anesthesia gas concentration has great significance in clinical practice.
In the prior art, the measuring principle of the gas concentration monitoring instrument of field of medical device is all generally based on NDIR (Non-Dispersive Infrared) spectral analysis technique (NDIR, Non Dispersive Infrared), when infrared light is by tested gas, the infrared light of gas molecule to specific wavelength has absorption, it absorbs relation and obeys Lambert-Beer (Lambert-Beer) absorption law, therefore enough can detect gas concentration by the degree of absorption of infrared radiation under measurement specific wavelength.
But current detecting instrument can only detect the concentration of sealed air chamber, the concentration of diffusion type air chamber can not be detected, therefore in use have certain limitation.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of pick-up unit of anesthesia gas concentration, and can realize the detection to anesthesia gas concentration in diffusion type air chamber, practicality is stronger.
The pick-up unit of anesthesia gas concentration of the present utility model, comprising:
Infrared light supply, has the light source transmitting terminal launching infrared beam;
Collimation lens, changes into directional light by the infrared beam that described light source transmitting terminal sends;
Chopping modulation device, has and receives the light input end of directional light, and by light output end that the interchange light signal changed into by chopping modulation device exports;
Detect air chamber, there is chamber, be opened in the light mouth of chamber side and be opened in the beam projecting mouth of opposite side of chamber, anesthetic gases is full of in described chamber, described anesthetic gases composition is consistent with the composition and concentration being detected indoor anesthetic gases with concentration, and described interchange light signal passes light mouth and penetrates from beam projecting mouth through chamber;
Convergent lens, the light beam penetrated by the beam projecting mouth of described detection air chamber is assembled;
Narrow wide infrared fileter, receives the light beam after assembling and makes to pass through and the beam reflection of its all band or decay to the infrared beam of the corresponding wave band of tested anesthetic gases absorbing wavelength;
Infrared eye, has and receives by the light window of the infrared beam of narrow wide infrared fileter and convert light signal to electric signal and export the signal output window of described electric signal;
Amplifying circuit, has the signal receiving end that receives described electric signal and the signal output part in order to export the electric signal amplified by described amplifying circuit;
Processes and displays device, receive and process amplifying circuit amplify after electric signal to obtain the concentration of anesthetic gases, and then display detect anesthesia gas concentration information.
Further, described detection air chamber communicates with detected room.
Further, described detection air chamber offers the opening that chamber is communicated with the external world.
Further, described narrow wide infrared fileter centre wavelength is 7.79 μm, and bandwidth is ± 70nm.
Further, the service band of described narrow wide infrared fileter is 780 ~ 1500nm.
Further, described processes and displays device comprises data acquisition system (DAS) and interface display system.
The beneficial effects of the utility model are: compared with prior art, the pick-up unit of the anesthesia gas concentration that the utility model proposes is consistent with the composition and concentration being detected indoor anesthetic gases with concentration owing to detecting the anesthetic gases composition be full of in the chamber of air chamber, therefore, it is possible to realize the detection of anesthetic gases in detected room, the particularly detection of anesthetic gases in diffusion type air chamber, practicality is stronger.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the pick-up unit of a kind of anesthesia gas concentration of the utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
Shown in Figure 1, the pick-up unit of a kind of anesthesia gas concentration described in the utility model one embodiment, for the Concentration Testing of clinical conventional anesthetic gases, anesthetic gases in the present embodiment is Sevoflurane, and this device comprises infrared light supply 1, collimation lens 2, chopping modulation device 3, detects air chamber 4, convergent lens 5, narrow wide infrared fileter 6, infrared eye 7, amplifying circuit 8, processes and displays device 9.Wherein, infrared light supply 1 has the light source transmitting terminal launching infrared beam; The infrared beam that described light source transmitting terminal sends is changed into directional light by collimation lens 2; Chopping modulation device 3 has and receives the light input end of directional light, and by light output end that the interchange light signal changed into by chopping modulation device exports; Detect air chamber 4 and there is chamber, be opened in the light mouth of chamber side and be opened in the beam projecting mouth of opposite side of chamber, anesthetic gases is full of in described chamber, described anesthetic gases composition is consistent with the composition and concentration being detected indoor anesthetic gases with concentration, described interchange light signal, through light mouth and through chamber from the injection of beam projecting mouth, detects air chamber 4 and offers the opening that chamber is communicated with the external world; The light beam of the beam projecting mouth injection detecting air chamber 4 is assembled by convergent lens 5; Narrow wide infrared fileter 6 receives the light beam after assembling and makes to pass through and the beam reflection of its all band or decay to the infrared beam of the corresponding wave band of tested anesthetic gases absorbing wavelength, this narrow wide infrared fileter centre wavelength is 7.79 μm, bandwidth is ± 70nm, service band is 780 ~ 1500nm, and infrared eye 7 has and receives by the light window of the infrared beam of narrow wide infrared fileter and convert light signal to electric signal and export the signal output window of described electric signal; Amplifying circuit 8 has the signal receiving end that receives described electric signal and the signal output part in order to export the electric signal amplified by described amplifying circuit; Processes and displays device 9 receive and process amplifying circuit amplify after electric signal to obtain the concentration of anesthetic gases, and then display detect anesthesia gas concentration information, described processes and displays device comprises data acquisition system (DAS) and interface display system.
The principle of work of the pick-up unit of described anesthesia gas concentration is as follows: the infrared light that infrared light supply 1 sends becomes parallel rays and injects chopping modulation device 3 after collimation lens 2, chopping modulation device 3 makes incident infrared beam interrupt in non-uniform time interval, direct current light signal is transformed into interchange light signal, so that amplifying circuit 8 obtains signal below, the Infrared penetrated from chopping modulation device 3 is injected into detection air chamber 4, owing to detecting air chamber 4 inside, there is the chamber communicated with detected room, if the Sevoflurane gases did escape that medical surgery room uses, Sevoflurane then in detected room diffuses in the chamber of detection air chamber 4, in other embodiments, can be detected in air chamber 4 by the real-time anesthetic gases of detected indoor is poured into of the devices such as air pump.The principle high to specific wavelength infrared Absorption rate according to specific gas, gas concentration can be detected by the degree of absorption of infrared light under measurement specific wavelength, in the present embodiment, to the infrared light of 1283nm wavelength in the Infrared injected, there is specific absorption owing to diffusing to the Sevoflurane detected in air chamber 4 chamber, Infrared after Sevoflurane absorbs penetrates from detection air chamber 4, through convergent lens 5, convergent lens 5 is utilized Infrared to be converged on narrow wide infrared fileter 6, described narrow wide infrared fileter 6 centre wavelength is 7.79 μm, bandwidth is ± 70nm, the light of 780 ~ 1500nm wavelength can be allowed to pass through and allow the light of its all band reflect or decay, to realize the selection of infrared band.Infrared eye 7 is injected by the Infrared of narrow wide infrared fileter 6, infrared eye 7 exports after light signal is converted to electric signal, input processing display device 9 after electric signal amplifies by amplifying circuit 8, the electrical signal data of data acquisition system (DAS) 91 to input of described processes and displays device 9 carries out computing to obtain the concentration of Sevoflurane gas, its principle is that the Infrared of 1283nm wavelength to be detected in air chamber 4 after Sevoflurane gas absorption, infrared light intensity size and the light path detecting air chamber 4 of this wavelength of injection, the product of sevoflurane concentration is linear, therefore the electric signal that obtains of infrared eye 7 and Sevoflurane gas concentration proportional, utilize the Sevoflurane calibrating gas calibration coefficient of concentration known, namely in actual testing process, the concentration of Sevoflurane gas in operating room is calculated by this calibration coefficient, finally show this concentration at interface display system 92.
In sum, the pick-up unit of the anesthesia gas concentration that the utility model proposes, the detection to conventional anesthesia gas concentration can be realized, the particularly detection of anesthetic gases in diffusion type air chamber, can monitor in real time, effectively the indoor anesthetic gases of operation, in addition, this apparatus structure is simple, be easy to operation, be convenient for carrying.
The above is only preferred implementation of the present utility model; be not limited to the utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (6)
1. a pick-up unit for anesthesia gas concentration, is characterized in that: the pick-up unit of described anesthesia gas concentration comprises:
Infrared light supply, has the light source transmitting terminal launching infrared beam;
Collimation lens, changes into directional light by the infrared beam that described light source transmitting terminal sends;
Chopping modulation device, has and receives the light input end of directional light, and by light output end that the interchange light signal changed into by chopping modulation device exports;
Detect air chamber, there is chamber, be opened in the light mouth of chamber side and be opened in the beam projecting mouth of opposite side of chamber, anesthetic gases is full of in described chamber, described anesthetic gases composition is consistent with the composition and concentration being detected indoor anesthetic gases with concentration, and described interchange light signal passes light mouth and penetrates from beam projecting mouth through chamber;
Convergent lens, the light beam penetrated by the beam projecting mouth of described detection air chamber is assembled;
Narrow wide infrared fileter, receives the light beam after assembling and makes to pass through and the beam reflection of its all band or decay to the infrared beam of the corresponding wave band of tested anesthetic gases absorbing wavelength;
Infrared eye, has and receives by the light window of the infrared beam of narrow wide infrared fileter and convert light signal to electric signal and export the signal output window of described electric signal;
Amplifying circuit, has the signal receiving end that receives described electric signal and the signal output part in order to export the electric signal amplified by described amplifying circuit;
Processes and displays device, receive and process amplifying circuit amplify after electric signal to obtain the concentration of anesthetic gases, and then display detect anesthesia gas concentration information.
2. the pick-up unit of anesthesia gas concentration according to claim 1, is characterized in that: described detection air chamber communicates with detected room.
3. the pick-up unit of anesthesia gas concentration according to claim 2, is characterized in that: described detection air chamber offers the opening that chamber is communicated with the external world.
4. the pick-up unit of anesthesia gas concentration according to claim 1, is characterized in that: described narrow wide infrared fileter centre wavelength is 7.79 μm, and bandwidth is ± 70nm.
5. the pick-up unit of anesthesia gas concentration according to claim 1, is characterized in that: the service band of described narrow wide infrared fileter is 780 ~ 1500nm.
6. the pick-up unit of anesthesia gas concentration according to claim 1, is characterized in that: described processes and displays device comprises data acquisition system (DAS) and interface display system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420717449.5U CN204228601U (en) | 2014-09-01 | 2014-11-25 | The pick-up unit of anesthesia gas concentration |
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| CN201420500255X | 2014-09-01 | ||
| CN201420500255 | 2014-09-01 | ||
| CN201420717449.5U CN204228601U (en) | 2014-09-01 | 2014-11-25 | The pick-up unit of anesthesia gas concentration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053376A (en) * | 2016-08-16 | 2016-10-26 | 北京千安哲信息技术有限公司 | Gas pollutant detection device |
| CN109799206A (en) * | 2019-03-08 | 2019-05-24 | 上海大学 | A kind of overstepping one's bounds light type infrared gas sensor and its method of operation |
-
2014
- 2014-11-25 CN CN201420717449.5U patent/CN204228601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053376A (en) * | 2016-08-16 | 2016-10-26 | 北京千安哲信息技术有限公司 | Gas pollutant detection device |
| CN109799206A (en) * | 2019-03-08 | 2019-05-24 | 上海大学 | A kind of overstepping one's bounds light type infrared gas sensor and its method of operation |
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