CN1888827A - Pressure liquid level detector for enzyme immunity instrument - Google Patents
Pressure liquid level detector for enzyme immunity instrument Download PDFInfo
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- CN1888827A CN1888827A CN 200610041014 CN200610041014A CN1888827A CN 1888827 A CN1888827 A CN 1888827A CN 200610041014 CN200610041014 CN 200610041014 CN 200610041014 A CN200610041014 A CN 200610041014A CN 1888827 A CN1888827 A CN 1888827A
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Abstract
A pressure liquid level detecting equipment of enzyme exempting instrument, including: the adding sample needle that sets a open at the bottom and connects the adding sample pipeline at top, the back-end of the adding sample pipeline connects the micro injector, the adding sample pipeline connects the micro-pressure sensor; the invention use the general adding sample needle and the high sensitive pressure sensor to detect the liquid surface, the pressure sensor can measure the pressure difference change when the adding sample needle inserts the liquid surface, in order to achieve the accurate detection of the liquid surface; the invention need not the expensive once electric needle and the Teflon steel needle, that can avoid the polluting risk.
Description
Technical field
The present invention relates to a kind of pressure liquid level detector for enzyme immunity instrument.
Background technology
Level detection application to little solution amount (in the small test tube) is very extensive in the world at present, and various separatory self-reacting devices all relate to this technology.
The external main charge migration change sensor that adopts, charge variation to syringe needle is surveyed, when syringe needle (conduction) touches liquid side, will produce charge migration changes, then the value that the AD computing draws a quantification is passed in this variation, according to the comparison that touches the minimum variable quantity of this value of liquid level, get rid of Effect of Environmental, judge whether arrive the fluid level.The advantage of this method is highly sensitive, and reaction is very fast.Shortcoming is that detection portion must use conductive body to go to contact the fluid level, for liquid shifting equipment, needs to adopt disposable conductive plastic syringe needle or uses the teflon draw point to guarantee electric conductivity.But the main dependence on import of disposable conductive plastic syringe needle, price comparison costliness (price of conduction syringe needle is about ten times of common syringe needle) makes the use cost of hospital higher; And the repeated use of teflon draw point can bring the risk of sample cross pollution, makes testing result mistake occur.
Summary of the invention
The object of the invention provides a kind of pressure liquid level detector for enzyme immunity instrument, adopt common application of sample syringe needle and high sensitivity pressure transducer to carry out detecting liquid level, when the application of sample syringe needle inserts liquid level, pressure transducer can record pressure reduction to be changed, thereby realize the accurate detection operations of liquid level, need not expensive disposable conduction syringe needle, reduced user's use cost, do not adopt the teflon draw point yet, avoided the risk of cross pollution.
Technical scheme of the present invention is: a kind of pressure liquid level detector for enzyme immunity instrument, comprise that the lower end is provided with the application of sample syringe needle that opening, upper end are connected with the application of sample pipeline, and the rear end of described application of sample pipeline is connected with microsyringe, is connected with micro-pressure sensor on the application of sample pipeline.
The further technical scheme of the present invention is: a kind of pressure liquid level detector for enzyme immunity instrument, comprise that the lower end is provided with the application of sample syringe needle that opening, upper end are connected with the application of sample pipeline, the rear end of described application of sample pipeline is connected with microsyringe, is connected with micro-pressure sensor on the application of sample pipeline; Described micro-pressure sensor is connected on the application of sample pipeline with three-way connection.
The more detailed technical scheme of the present invention is: a kind of pressure liquid level detector for enzyme immunity instrument, comprise that the lower end is provided with the application of sample syringe needle that opening, upper end are connected with the application of sample pipeline, the rear end of described application of sample pipeline is connected with microsyringe, is connected with micro-pressure sensor on the application of sample pipeline; Described micro-pressure sensor is connected on the application of sample pipeline with three-way connection; Described microsyringe adopts piston cylinder operator.
Advantage of the present invention is:
1. the present invention adopts common application of sample syringe needle and high sensitivity pressure transducer to carry out detecting liquid level, and when the application of sample syringe needle inserted liquid level, pressure transducer can record pressure reduction to be changed, thereby realizes the accurate detection operations of liquid level.
2. the present invention need not expensive disposable conduction syringe needle, has reduced user's use cost, does not also adopt the teflon draw point, has avoided the risk of cross pollution.
Description of drawings
The invention will be further described below in conjunction with embodiment:
Fig. 1 is a structural representation of the present invention.
Wherein: 1 opening; 2 application of sample pipelines; 3 application of sample syringe needles; 4 microsyringes; 5 micro-pressure sensors; 6 three-way connections.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment: as shown in Figure 1, a kind of pressure liquid level detector for enzyme immunity instrument, comprise that the lower end is provided with the application of sample syringe needle 3 that opening 1, upper end are connected with application of sample pipeline 2, the rear end of described application of sample pipeline 2 is connected with microsyringe 4, microsyringe 4 adopts piston cylinder operator, is connected with micro-pressure sensor 5 with three-way connection 6 on the application of sample pipeline 2.
When detection of liquid level, application of sample syringe needle 3 constantly descends by motor, pressure transducer 5 is started working simultaneously, before syringe needle 3 arrives liquid level, syringe needle 3 internal cavities do not seal, the pressure at two ends of micro-pressure sensor 5 all is the atmospheric pressure of place environment, pressure reduction does not exist, delta pressure readings is zero, when the 3 continuation declines of application of sample syringe needle by chance arrive liquid level, variation has taken place in situation, and the application of sample cavity is just lived by the hydraulic seal of liquid level, though this moment, pressure there is no marked change, but when application of sample syringe needle 3 continues to advance under liquid level, application of sample cavity internal pressure just begins obviously to change, and one millimeter of every in theory decline just has the pressure differential of a millimeter of water (supposing that application of sample liquid is water) to change, and the resolution of our micro-pressure sensor 5 can reach 0.1 millimeter of water, instantaneous pressure sensor 5 just can tell whether host computer arrives the fluid level like this, and host computer can be proceeded next step imbibition operation, has so just realized the accurate detection operations of liquid level.
Application of sample is mainly produced certain pressure variation absorption, is emitted liquid by the piston motion of microsyringe 4, and pressure transducer 5 is connected on the application of sample pipeline 2 by threeway 6, works when detection of liquid level, measures application of sample syringe needle 3 intracavity gas pressure and changes.
The present invention adopts common application of sample syringe needle 3 and high sensitivity pressure transducer 5 to carry out detecting liquid level, and when application of sample syringe needle 3 inserted liquid level, pressure transducer 5 can record pressure reduction to be changed, thereby realizes the accurate detection operations of liquid level;
The present invention need not expensive disposable conduction syringe needle, has reduced user's use cost, does not also adopt the teflon draw point, has avoided the risk of cross pollution.
Claims (3)
1. pressure liquid level detector for enzyme immunity instrument, comprise that the lower end is provided with the application of sample syringe needle (3) that opening (1), upper end are connected with application of sample pipeline (2), it is characterized in that: the rear end of described application of sample pipeline (2) is connected with microsyringe (4), is connected with micro-pressure sensor (5) on the application of sample pipeline (2).
2. pressure liquid level detector for enzyme immunity instrument according to claim 1 is characterized in that: described micro-pressure sensor (5) is connected on the application of sample pipeline (2) with three-way connection (6).
3. pressure liquid level detector for enzyme immunity instrument according to claim 1 is characterized in that: described microsyringe (4) adopts piston cylinder operator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610041014 CN1888827A (en) | 2006-07-12 | 2006-07-12 | Pressure liquid level detector for enzyme immunity instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610041014 CN1888827A (en) | 2006-07-12 | 2006-07-12 | Pressure liquid level detector for enzyme immunity instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1888827A true CN1888827A (en) | 2007-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610041014 Pending CN1888827A (en) | 2006-07-12 | 2006-07-12 | Pressure liquid level detector for enzyme immunity instrument |
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| Country | Link |
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| CN (1) | CN1888827A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501904A (en) * | 2014-12-31 | 2015-04-08 | 烟台艾德康生物科技有限公司 | Gas-water exchange negative-pressure detection device and operating principle thereof |
| CN104713614A (en) * | 2015-03-20 | 2015-06-17 | 长春迪瑞医疗科技股份有限公司 | Device and method for detecting liquid level |
| CN110806491A (en) * | 2019-11-15 | 2020-02-18 | 成都宜乐芯生物科技有限公司 | Full-automatic POCT multiple detection liquid phase chip system |
-
2006
- 2006-07-12 CN CN 200610041014 patent/CN1888827A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501904A (en) * | 2014-12-31 | 2015-04-08 | 烟台艾德康生物科技有限公司 | Gas-water exchange negative-pressure detection device and operating principle thereof |
| CN104501904B (en) * | 2014-12-31 | 2018-06-19 | 烟台艾德康生物科技有限公司 | A kind of water_air exchange negative pressure detection device and its operation principle |
| CN104713614A (en) * | 2015-03-20 | 2015-06-17 | 长春迪瑞医疗科技股份有限公司 | Device and method for detecting liquid level |
| CN104713614B (en) * | 2015-03-20 | 2018-01-16 | 迪瑞医疗科技股份有限公司 | A kind of liquid level sensor and detection method |
| CN110806491A (en) * | 2019-11-15 | 2020-02-18 | 成都宜乐芯生物科技有限公司 | Full-automatic POCT multiple detection liquid phase chip system |
| CN110806491B (en) * | 2019-11-15 | 2024-03-29 | 成都宜乐芯生物科技有限公司 | Full-automatic POCT multiple detection liquid phase chip system |
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