CN105758497A - Liquid level detection device for excitation liquid - Google Patents
Liquid level detection device for excitation liquid Download PDFInfo
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- CN105758497A CN105758497A CN201410784909.0A CN201410784909A CN105758497A CN 105758497 A CN105758497 A CN 105758497A CN 201410784909 A CN201410784909 A CN 201410784909A CN 105758497 A CN105758497 A CN 105758497A
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Abstract
The invention provides a liquid level detection device for an excitation liquid. The liquid level detection device comprises an MCU (microprogrammed control unit) main control unit, a phase-locked loop circuit unit connected with the MCU main control unit and a detection unit connected with the phase-locked loop circuit unit, wherein the detection unit and the phase-locked loop circuit unit are connected through a coaxial cable; the detection unit is used for detecting space capacitance of the liquid level of the excitation liquid and transmitting the detected space capacitance to the phase-locked loop circuit unit through the coaxial cable; frequency output by the phase-locked loop circuit unit is captured by the MCU main control unit, and a program in the MCU main control unit judges the content of the excitation liquid through judgment of the captured frequency. According to the detection device, after a signal is transmitted to the phase-locked loop circuit by a metal detection rod and is processed, the liquid level detection is performed by the MCU main control unit according to frequency change, and the liquid level detection device for the excitation liquid has the advantages of small occupied space, sensitive response and high precision.
Description
Technical field
The invention belongs to medical instruments field, relate to electrochemiluminescent immunoassay detection analysis field, more particularly a kind of exciting liquid liquid level detector.
Background technology
Medical treatment detection analytical tool needs the test of various liquid line operation and project to support instrument in carrying out normal assays running, how many in order to understand various content liquid accurately and in time, and whether there is the situation that liquid is used up, it is thus desirable to liquid level detector accurately, in order to understand various liquid conditions in time.
Level Detection mode conventional in current instrument mainly uses float switch to carry out level detection, but float switch detection device exists the shortcomings such as big, detection accuracy difference that take up room.Accordingly, it is now desired to a kind of little for the exciting liquid carrying vessel volume used in instrument, detection accuracy requires high exciting liquid liquid level detector.
Summary of the invention
For drawbacks described above of the prior art, the invention provides the exciting liquid liquid level detector that a kind of volume is little and detection accuracy is high.
Technical scheme: a kind of for exciting liquid liquid level detector, the phase-locked loop circuit unit being connected with described MCU Main Processing Unit including MCU Main Processing Unit and the probe unit being connected with above-mentioned phase-locked loop circuit, be connected by coaxial cable between described probe unit with described phase-locked loop circuit unit；Described probe unit is used for detecting exciting liquid liquid level space electric capacity, the alone space electric capacity detected of described detection is transferred to described phase-locked loop circuit unit by described coaxial cable, the frequency of described phase-locked loop circuit output is caught by described MCU Main Processing Unit, and the program in described MCU Main Processing Unit is by judging that its frequency caught height judges the content of exciting liquid.
In one preferred embodiment of the present invention, it is preferable that described probe unit is cylindrical metal detector bar.
In one preferred embodiment of the present invention, it is preferable that the top layer of described cylindrical metal detector bar scribbles inert material.
In one preferred embodiment of the present invention, it is preferable that described phase-locked loop circuit unit includes the voltage controlled oscillator, phase-locked loop intergrated circuit and the frequency divider that are sequentially connected with.
In one preferred embodiment of the present invention, it is preferable that also include benchmark detecting plate, described benchmark detecting plate is arranged on the outside lower end of exciting liquid liquid bottle, and described cylindrical metal detector bar can extend into inside described exciting liquid liquid bottle.
In one preferred embodiment of the present invention, it is preferable that also include PC, described PC connects described MCU Main Processing Unit, and described PC is for processing the liquid level signal from described MCU Main Processing Unit.
In one preferred embodiment of the present invention, it is preferable that be connected by CAN industrial field bus between described PC with described MCU Main Processing Unit.
The invention solves deficiency of the prior art, the beneficial effect reached:
The detection device of the present invention, it is mainly used in exciting liquid level detection, the little metal bar that takes up room used herein is as detecting head, this detecting head can easily be placed in the exciting liquid bottle that volume is little, signal is transferred in phase-locked loop circuit by the coaxial cable that shielding is high simultaneously, is transferred in MCU after being then passed through voltage conversion and judges.
It uses metal detection rod to transfer signals to after phase-locked loop circuit processes, MCU carry out level detection according to frequency change, has reached that space hold is little, is quick on the draw, advantage that precision is high.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the Structure and Process schematic diagram of the present invention.
Fig. 2 is that the present invention detects cellular construction schematic diagram.
Wherein, 1-cylindrical metal detector bar, 2-exciting liquid liquid bottle, 3-benchmark detecting plate, 4-fixes device.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, and it is understandable to enable the above-mentioned purpose of the present invention, feature and advantage to become apparent from, and below in conjunction with embodiment and embodiment accompanying drawing, the present invention is further detailed explanation.
As shown in Figure 1-2, disclosure one is used for exciting liquid liquid level detector, and it mainly includes the probe unit that the phase-locked loop circuit unit that MCU Main Processing Unit is connected is connected with above-mentioned phase-locked loop circuit and the PC passing through the CAN industrial field bus above-mentioned MCU Main Processing Unit of connection with above-mentioned MCU Main Processing Unit.
Concrete, it is connected by coaxial cable between above-mentioned probe unit with above-mentioned phase-locked loop circuit unit；Above-mentioned probe unit is used for detecting exciting liquid liquid level space electric capacity, the alone space electric capacity detected of above-mentioned detection is transferred to above-mentioned phase-locked loop circuit unit by above-mentioned coaxial cable, the frequency of above-mentioned phase-locked loop circuit output is caught by above-mentioned MCU Main Processing Unit, and the program in above-mentioned MCU Main Processing Unit is by judging that its frequency caught height judges the content of exciting liquid；Above-mentioned PC is for processing the liquid level signal from above-mentioned MCU Main Processing Unit.
In the present embodiment, occupy little space to realize exciting liquid detection apparatus function, above-mentioned probe unit is designed to cylindrical metal detector bar 1, above-mentioned metal detection rod is designed to cylinder, it is possible in exciting liquid liquid bottle, take less space；In order to avoid the detector bar impact on exciting liquid, scribble inert material on the top layer of above-mentioned cylindrical metal detector bar 1.
And outside 2 lower ends of above-mentioned exciting liquid liquid bottle are provided with benchmark detecting plate 3, simultaneously, it is internal that above-mentioned cylindrical metal detector bar 1 can extend into above-mentioned exciting liquid liquid bottle 2, can stablize when above-mentioned exciting liquid liquid bottle 2 internal detection in order to ensure above-mentioned cylindrical metal detector bar 1, bottle mouth position at above-mentioned exciting liquid liquid bottle 2 is provided with the fixing device 4 that column type detector bar 1 matches, cylindrical metal detector bar 1 can put on above-mentioned fixing device 4, and above-mentioned fixing device 4 can cover the bottle mouth position at above-mentioned exciting liquid liquid bottle 2.
Concrete, above-mentioned phase-locked loop chip includes the voltage controlled oscillator being sequentially connected with, phase-locked loop intergrated circuit, the parts such as frequency divider, wherein voltage controlled oscillator provides a signal, a part is as output, another part carries out phase bit comparison by dividing the local oscillation signal produced with phase-locked loop intergrated circuit, in order to keep frequency constant, just require that phase contrast can not change, change if there is phase contrast, so the voltage of the voltage output end of phase-locked loop chip will change, the liquid level utilizing liquid to be detected is how many, the change of the electric capacity detected on detector bar can be caused, thus the change of phase-locked loop circuit frequency can be affected to reach detecting function.
The operation principle of the detection exciting liquid liquid level realizing the present invention is: exciting liquid liquid level detector, by there is the cylindrical metal detector bar of electric conductivity as detecting head, simultaneously detector bar contact liq number can affect the space electric capacity on detector bar, then the space electric capacity detected by detector bar is transferred in phase-locked loop circuit unit by having the coaxial cable of high signal shielding function, and the change of input capacitance can cause the change of output frequency in phase-locked loop circuit unit.
The frequency acquisition function using MCU Main Processing Unit carries out the detection of phase-locked loop circuit unit output frequency, because I haven't seen you for ages causes the change of phase-locked loop circuit unit output frequency for long-pending many of cylindrical metal detector bar and liquid contact surface, therefore can carry out the height of determination frequency by MCU Main Processing Unit Program and realize the content of liquid in liquid bottle, and can report to the police after arriving early warning value.So can realize the accurate warning of exciting liquid liquid level, detected liquid measure number.
The detection device of the present invention uses metal detection rod to transfer signals to after phase-locked loop circuit processes, MCU carry out level detection according to frequency change, has reached that space hold is little, is quick on the draw, advantage that precision is high.
The above; being only the specific embodiment of the present invention, protection scope of the present invention is not limited thereto, and any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim defines.
Claims (7)
1. one kind is used for exciting liquid liquid level detector, it is characterized in that, the phase-locked loop circuit unit being connected with described MCU Main Processing Unit including MCU Main Processing Unit and the probe unit being connected with described phase-locked loop circuit unit, be connected by coaxial cable between described probe unit with described phase-locked loop circuit unit；
Described probe unit is used for detecting exciting liquid liquid level space electric capacity, the alone space electric capacity detected of described detection is transferred to described phase-locked loop circuit unit by described coaxial cable, the frequency of described phase-locked loop circuit unit output is caught by described MCU Main Processing Unit, and the program in described MCU Main Processing Unit is by judging that its frequency caught height judges the content of exciting liquid.
2. one according to claim 1 is used for exciting liquid liquid level detector, it is characterised in that described probe unit is cylindrical metal detector bar.
3. one according to claim 2 is used for exciting liquid liquid level detector, it is characterised in that the top layer of described cylindrical metal detector bar scribbles inert material.
4. one according to claim 1 is used for exciting liquid liquid level detector, it is characterised in that described phase-locked loop circuit unit includes the voltage controlled oscillator, phase-locked loop intergrated circuit and the frequency divider that are sequentially connected with.
5. one according to claim 4 is used for exciting liquid liquid level detector, it is characterized in that, also including benchmark detecting plate, described benchmark detecting plate is arranged on the outside lower end of exciting liquid liquid bottle, and described cylindrical metal detector bar can extend into inside described exciting liquid liquid bottle.
6. one according to claim 1 is used for exciting liquid liquid level detector, it is characterised in that also include PC, and described PC connects described MCU Main Processing Unit, and described PC is for processing the liquid level signal from described MCU Main Processing Unit.
7. one according to claim 6 is used for exciting liquid liquid level detector, it is characterised in that be connected by CAN industrial field bus between described PC with described MCU Main Processing Unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784909.0A CN105758497A (en) | 2014-12-18 | 2014-12-18 | Liquid level detection device for excitation liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784909.0A CN105758497A (en) | 2014-12-18 | 2014-12-18 | Liquid level detection device for excitation liquid |
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| Publication Number | Publication Date |
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| CN105758497A true CN105758497A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410784909.0A Pending CN105758497A (en) | 2014-12-18 | 2014-12-18 | Liquid level detection device for excitation liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669034A (en) * | 2018-12-21 | 2019-04-23 | 苏州长光华医生物医学工程有限公司 | Liquid bottle liquid inspection system and its application method |
Citations (5)
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| GB2258048A (en) * | 1991-07-25 | 1993-01-27 | Jalco Co Ltd | Capacitance variation detection circuit |
| CN2588334Y (en) * | 2002-12-27 | 2003-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level detector for biochemical analysis |
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN203323827U (en) * | 2013-07-12 | 2013-12-04 | 苏州长光华医生物医学工程有限公司 | Self-adaption liquid level detection system |
| CN103585690A (en) * | 2013-10-15 | 2014-02-19 | 医惠科技(苏州)有限公司 | Transfusion safety control system and device combination |
-
2014
- 2014-12-18 CN CN201410784909.0A patent/CN105758497A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2258048A (en) * | 1991-07-25 | 1993-01-27 | Jalco Co Ltd | Capacitance variation detection circuit |
| CN2588334Y (en) * | 2002-12-27 | 2003-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level detector for biochemical analysis |
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN203323827U (en) * | 2013-07-12 | 2013-12-04 | 苏州长光华医生物医学工程有限公司 | Self-adaption liquid level detection system |
| CN103585690A (en) * | 2013-10-15 | 2014-02-19 | 医惠科技(苏州)有限公司 | Transfusion safety control system and device combination |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669034A (en) * | 2018-12-21 | 2019-04-23 | 苏州长光华医生物医学工程有限公司 | Liquid bottle liquid inspection system and its application method |
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Application publication date: 20160713 |