CN204719063U - Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit - Google Patents
Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit Download PDFInfo
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- CN204719063U CN204719063U CN201520181651.5U CN201520181651U CN204719063U CN 204719063 U CN204719063 U CN 204719063U CN 201520181651 U CN201520181651 U CN 201520181651U CN 204719063 U CN204719063 U CN 204719063U
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- sample needle
- pressure transducer
- analysis instrument
- alarm circuit
- immunity analysis
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Abstract
Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, comprise sample needle, it is characterized in that: comprise pressure transducer, A/D conversion chip, described pressure transducer is connected with the needle path of sample needle, described pressure transducer gathers the pressure value in needle path, by A/D conversion chip, pressure value is changed into digital quantity from analog quantity, be then transferred to subsequent processor and data are processed.Whether the utility model energy device that is quick, effectively detection specimen needle state, effectively can determine specimen needle and block.
Description
Technical field
The design relates to chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, belongs to technical field of medical instruments.
Background technology
Chemical illumination immunity analysis instrument is in the process used, there is the impurity such as floccus or grumeleuse in the sample occasional drawn due to specimen needle, affect pipeline liquid flow, and due to specimen needle internal diameter less, very easily cause sample needle line clogging, cause application of sample amount inaccurate, have influence on accuracy and the validity of experimental data.Cause
This, the state of Real-Time Monitoring sample needle, finds that stifled pin is reported to the police immediately and has very important significance.For this reason, devise the device that a kind of energy is quick, effectively detect specimen needle state, effectively can determine specimen needle and whether block, if blocking, and alarm.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, it connects a pressure transducer in the detergent line of specimen needle, when drawing sample and application of sample tells liquid, the pressure change in signal piping is carried out by pressure transducer, by compare normal condition and specimen needle inhale, tell liquid time force value, judge whether sample needle blocks.
For achieving the above object, the design is realized by following technological means:
Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, comprise sample needle, it is characterized in that: comprise pressure transducer, A/D conversion chip, described pressure transducer is connected with the needle path of sample needle, described pressure transducer gathers the pressure value in needle path, by A/D conversion chip, pressure value is changed into digital quantity from analog quantity, be then transferred to subsequent processor and data are processed.
Further:
Described chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, it is characterized in that: described pressure transducer positive/negative-pressure output port is respectively connected to the input end of analog signal of described A/D conversion chip by a low-pass filter circuit, realize PGA by A/D conversion chip inner low noise instrumentation amplifier structure and amplify.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: described A/D conversion chip is CS1232.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: the enlargement factor of the inner low noise instrumentation amplifier of described A/D conversion chip selects 128 times.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: HoneyWell 26PCCF6G pressure transducer selected by described pressure transducer.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: described pressure transducer is connected with the needle path of sample needle by threeway.
The invention has the beneficial effects as follows: the present invention fast, effectively can detect the device of specimen needle state, effectively can determine specimen needle and whether block.
Accompanying drawing explanation
Fig. 1 is circuit of the present invention composition structural representation.
Embodiment
Below in conjunction with Figure of description, design is further described.
Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, comprise sample needle, it is characterized in that: comprise pressure transducer 1, A/D conversion chip 2, described pressure transducer 1 is connected with the needle path of sample needle, described pressure transducer 1 gathers the pressure value in needle path, by A/D conversion chip 2, pressure value is changed into digital quantity from analog quantity, be then transferred to subsequent processor and data are processed.
Further:
Described chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, it is characterized in that: described pressure transducer 1 positive/negative-pressure output port is respectively connected to the input end of analog signal of described A/D conversion chip 2 by a low-pass filter circuit, realize PGA by A/D conversion chip inner low noise instrumentation amplifier structure and amplify.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: described A/D conversion chip 2 is CS1232.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: the enlargement factor of the inner low noise instrumentation amplifier of described A/D conversion chip 2 selects 128 times.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: HoneyWell 26PCCF6G pressure transducer selected by described pressure transducer 1.
Described a kind of chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, is characterized in that: described pressure transducer 1 is connected with the needle path of sample needle by threeway.
Adopt pressure transducer 1 as main survey instrument, its effect is that the pressure produced in pipeline change is converted to change in voltage.When in pipeline, liquid flow is unimpeded, pressure transducer 1 produces a reference voltage, and when specimen needle pin mouth is plugged, ducted pressure can change, and the pressure that pressure transducer 1 exports also can change.Whether the magnitude of voltage according to change can block by judgement sample pin.The change in voltage produced due to pressure change is less, need to carry out amplification process by follow-up instrumentation amplifier to voltage signal, then the Signal transmissions after amplification is carried out analog to digital conversion to controller, the pressure value recorded, through subsequent processor process, finally can judge whether specimen needle blocks.
Specimen needle touch liquid level start to inhale sample time, the pressure in fluid path pipeline can change, thus produces a saltus step, inhales after sample, and fluid path pipeline force value is recovered, and can produce again a saltus step, thus forms a pressure pulse.The duration of the pressure pulse when specimen needle is drawn onto grumeleuse or floccus is different with the peak value of pulse, therefore inhales pressure change in sample process by monitoring and can judge the blocked state of specimen needle.Detect by pressure transducer the pressure inhaled in sample process to change, the output of pressure transducer is carried out analog to digital conversion through the A/D conversion chip with enlarging function, and processed by subsequent processor, line pressure and empirical value in suction sample process are compared, when whether inhaling sample with judgement sample pin, has been drawn onto foreign matter.
More than show and describe the ultimate principle of the design, principal character and advantage.The technician of the industry should understand; the design is not restricted to the described embodiments; the principle that the design is just described described in above-described embodiment and instructions; under the prerequisite not departing from the design's spirit and scope; the design also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the design.The claimed scope of the design is defined by appending claims and equivalent thereof.
Claims (6)
1. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit, comprise sample needle, it is characterized in that: comprise pressure transducer, A/D conversion chip, described pressure transducer is connected with the needle path of sample needle, described pressure transducer gathers the pressure value in needle path, by A/D conversion chip, pressure value is changed into digital quantity from analog quantity, be then transferred to subsequent processor and data are processed.
2. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit as claimed in claim 1, it is characterized in that: described pressure transducer positive/negative-pressure output port is respectively connected to the input end of analog signal of described A/D conversion chip by a low-pass filter circuit, realize PGA by A/D conversion chip inner low noise instrumentation amplifier structure and amplify.
3. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit as claimed in claim 1, is characterized in that: described A/D conversion chip is CS1232.
4. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit as claimed in claim 1, is characterized in that: the enlargement factor of the inner low noise instrumentation amplifier of described A/D conversion chip is 128 times.
5. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit as claimed in claim 1, is characterized in that: HoneyWell 26PCCF6G pressure transducer selected by described pressure transducer.
6. chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit as claimed in claim 1, is characterized in that: described pressure transducer is connected with the needle path of sample needle by threeway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520181651.5U CN204719063U (en) | 2015-03-30 | 2015-03-30 | Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520181651.5U CN204719063U (en) | 2015-03-30 | 2015-03-30 | Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit |
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| CN204719063U true CN204719063U (en) | 2015-10-21 |
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| CN201520181651.5U Active CN204719063U (en) | 2015-03-30 | 2015-03-30 | Chemical illumination immunity analysis instrument sample needle hole blockage alarm circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777323A (en) * | 2015-03-30 | 2015-07-15 | 苏州长光华医生物医学工程有限公司 | Chemiluminescence immunity analyzer sample addition needle hole plugging alarm circuit |
-
2015
- 2015-03-30 CN CN201520181651.5U patent/CN204719063U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777323A (en) * | 2015-03-30 | 2015-07-15 | 苏州长光华医生物医学工程有限公司 | Chemiluminescence immunity analyzer sample addition needle hole plugging alarm circuit |
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