CN201524080U - Breathing detection device for oxygenator controlling - Google Patents
Breathing detection device for oxygenator controlling Download PDFInfo
- Publication number
- CN201524080U CN201524080U CN 200920246833 CN200920246833U CN201524080U CN 201524080 U CN201524080 U CN 201524080U CN 200920246833 CN200920246833 CN 200920246833 CN 200920246833 U CN200920246833 U CN 200920246833U CN 201524080 U CN201524080 U CN 201524080U
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- circuit
- oxygenerator
- resistance
- detecting respiratory
- operational amplifier
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Abstract
The utility model discloses a breathing detection device for oxygenator controlling, which comprises a signal collecting circuit for collecting variant value of the pressure during breathing, and converting the variant value of the pressure into corresponding voltage variant signal to output; an operation magnifying circuit connected to the output end of the signal collecting circuit, for magnifying the voltage variant signal to output; a filtering circuit connected to the output end of the operation magnifying circuit, for outputting the magnified voltage variant signal to the control unit of the oxygenator after filtering. The precise control to the oxygen output of the oxygenator can be implemented by directly detecting pressure variance value during breathing by the air pressure sensor, magnifying the slight pressure variance during breathing by the operation magnifier circuit, and finally outputting the same to the control unit of the oxygenator in the manner of voltage.
Description
Technical field
This utility model relates to a kind of medical detecting Instrument, specifically, relates to a kind of device for detecting respiratory, particularly relates to oxygenerator control device for detecting respiratory.
Background technology
In recent years, along with the raising of people's living standard with to the enhancing of healthy attention degree, domestic oxygenerator, physical therapy oxygenerator just develop rapidly towards direction intelligent, microminiaturized, cheap.For improving the accuracy of product, universality and reliability, the simplification that the pneumatic control in the oxygenerator partly need design and the raising of performance.
The maximum characteristics of oxygenerator are exactly the air pressure transformed value of gathering when breathing, thereby the oxygen amount that goes out of oxygen delivery outlet is controlled.No matter be domestic oxygenerator or physical therapy oxygenerator, and medical oxygen generator, all need accurately to control to going out the oxygen amount, to cut down the consumption of energy, reduce exhaust emission.
The patent No. is ZL200620032850.0, Granted publication day to be the Chinese utility model patent on February 7th, 2007, disclosed device for detecting respiratory comprises probe, signal pickup circuit, bandwidth-limited circuit, signal transmission device spare, audio amplifier circuit etc., its muscle vibration that respiratory movement is caused by probe is converted into signals collecting capacitance change therebetween and detects, though can improve the accuracy of respiration detection, but need to use in conjunction with specific probe, in addition, be not suitable for oxygenerator control yet.
The utility model content
Technical problem to be solved in the utility model is at the deficiencies in the prior art, and a kind of device for detecting respiratory is provided, and to overcome the deficiency that existing device for detecting respiratory can not be applicable to oxygenerator control, accurately controls thereby conveniently oxygenerator is gone out the oxygen amount.
To achieve these goals, device for detecting respiratory is used in a kind of oxygenerator control that this utility model provides, and comprises signal acquisition circuit, operational amplification circuit and filter circuit.Wherein, the air pressure change value of signal acquisition circuit when gather breathing, and described air pressure change value is converted into the output of correspondent voltage variable signal; Operational amplification circuit links to each other with the outfan of described signal acquisition circuit, and described voltage change signal is amplified back output; Filter circuit links to each other with the outfan of described operational amplification circuit, will export the control unit of described oxygenerator after the voltage change signal filtering after the described amplification to.
Above-mentioned oxygenerator control device for detecting respiratory, wherein, described signal acquisition circuit is a gas pressure sensor, described gas pressure sensor comprises a power supply interface, a ground connection interface, a positive output voltage interface and a negative output voltage interface, and described power supply interface is connected with a direct current single supply.
Above-mentioned oxygenerator control device for detecting respiratory, wherein, described operational amplification circuit comprises an operational amplifier, a resistance R 1 and a resistance R 2, the positive pole of described operational amplifier links to each other with described positive output voltage interface, negative pole links to each other with described negative output voltage interface by described resistance R 1, described resistance R 2 one ends link to each other with the negative pole of described operational amplifier, and an end links to each other with the outfan of described operational amplifier.
Device for detecting respiratory is used in above-mentioned oxygenerator control, and wherein, described resistance R 2 is 450～550 with the ratio of resistance R 1.
Device for detecting respiratory is used in above-mentioned oxygenerator control, and wherein, described resistance R 2 is 500 with the ratio of resistance R 1.
Device for detecting respiratory is used in above-mentioned oxygenerator control, and wherein, described operational amplifier is the operational amplifier of single power supply.
Device for detecting respiratory is used in above-mentioned oxygenerator control, wherein, comprises that also one is connected the amplifier imbalance adjustment circuit between described gas pressure sensor and the described operational amplifier.
Device for detecting respiratory is used in above-mentioned oxygenerator control, and wherein, it is a potentiometer that circuit is adjusted in described amplifier imbalance.
Beneficial functional of the present utility model is: relative prior art, need not binding probe, air pressure change value when gas pressure sensor direct detection people breathes, air pressure change value faint in the time of will breathing by operation amplifier circuit is amplified, export to the control unit of oxygenerator at last in the mode of voltage, can realize the oxygen amount that of oxygenerator is accurately controlled.
Further, gas pressure sensor adopts the direct current single power supply, has reduced wiring and external devices, uses simple, easy to maintenance.
Below in conjunction with the drawings and specific embodiments this utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the structured flowchart of device for detecting respiratory of the present utility model;
Fig. 2 is the pinouts of the gas pressure sensor among Fig. 1;
Fig. 3 is circuit theory diagrams of the present utility model.
Wherein, Reference numeral
10-signal acquisition circuit 20-operational amplification circuit
21-operational amplifier 30-filter circuit
Circuit 200-control unit is adjusted in the imbalance of 40-amplifier
The specific embodiment
Below in conjunction with the drawings and specific embodiments technical solutions of the utility model being described in detail, further understanding the purpose of this utility model, scheme and effect, but is not the restriction as this utility model claims protection domain.
Device for detecting respiratory of the present utility model is mainly used on the oxygenerator, control oxygenerator is gone out the oxygen amount, consult the structured flowchart of Fig. 1 device for detecting respiratory of the present utility model, device for detecting respiratory comprises signal acquisition circuit 10, operational amplification circuit 20, filter circuit 30.Wherein, the air pressure change value of signal acquisition circuit 10 when gather breathing, and the air pressure change value is converted into the correspondent voltage variable signal exports operational amplification circuit 20 to; Operational amplification circuit 20 links to each other with the outfan of signal acquisition circuit 10, exports filter circuit 30 to after voltage change signal is amplified; Filter circuit 30 links to each other with the outfan of operational amplification circuit 20, will export the control unit 200 of oxygenerator after the voltage change signal filtering after amplifying to.
In conjunction with consulting Fig. 2 and Fig. 3, in the practical circuit of the present utility model, signal acquisition circuit 10 is a gas pressure sensor, this gas pressure sensor 10 comprises a power supply interface Vs, a ground connection interface GND, a positive output voltage interface+Vout and a negative output voltage interface-Vout, and this power supply interface Vs is connected with a direct current single supply.In the present embodiment, gas pressure sensor 10 can adopt the MPXM2010GS gas pressure sensor of Motorola Inc., this pick off adopts single silicon chip, on this silicon chip, be integrated with stress measurement and film resistor network, have high-precision scope and bias calibration and temperature-compensating, this pick off is adopted single power supply, deducted the trouble of dual power supply, reduced wiring and external module, saved cost, reduced between line and disturbed.Further, the direct current single supply of present embodiment adopts the power supply of 5V.
Operational amplification circuit 20 comprises operational amplifier 21, a resistance R 1 and a resistance R 2 of a single power supply, the positive pole of operational amplifier 21 links to each other with positive output voltage interface+Vout, negative pole links to each other with negative output voltage interface-Vout by resistance R 1, resistance R 2 one ends link to each other with the negative pole of operational amplifier 21, and an end links to each other with the outfan of operational amplifier.When reality is used, because the gas pressure change of breathing is fainter, need carry out suitable amplification and just can collect, so R1 and R2 need suitable ratio could remove interfering signal, preferably, resistance R 2 is 450～550 with the ratio of resistance R 1, through tight calculating and experiment, as R1=2K Ω, R2=1M Ω, i.e. R2: can reach best during R1=500.In the present embodiment, operational amplifier 21 adopts the LM258 device, and this device not only has the characteristics of single power supply, and has the characteristics of high-gain, low imbalance, is well positioned to meet the demand of this circuit.
In order effectively to prevent the imbalance of operational amplifier, device for detecting respiratory comprises that also one is connected the amplifier imbalance adjustment circuit 40 between gas pressure sensor 10 and the operational amplifier 21, in actual use, it is a potentiometer R4 that circuit 40 is adjusted in the amplifier imbalance, this potentiometer R4 returns to zero at the imbalance of LM258, each LM258 has different zeroisings in the production on circuit, use potentiometer to return to zero, not only accurately but also convenient, avoided the LM258 that the resistance of the same resistance value of use causes in the production process not to be operated in real zeroising, breathed accuracy and the degree of accuracy that air pressure detects thereby increased.
Certainly; this utility model also can have other various embodiments; under the situation that does not deviate from this utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to this utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of this utility model.
Claims (8)
1. device for detecting respiratory is used in an oxygenerator control, it is characterized in that, comprises
Signal acquisition circuit, the air pressure change value when gather breathing, and described air pressure change value is converted into the output of correspondent voltage variable signal;
Operational amplification circuit links to each other with the outfan of described signal acquisition circuit, and described voltage change signal is amplified back output;
Filter circuit links to each other with the outfan of described operational amplification circuit, will export the control unit of described oxygenerator after the voltage change signal filtering after the described amplification to.
2. oxygenerator control device for detecting respiratory according to claim 1, it is characterized in that, described signal acquisition circuit is a gas pressure sensor, described gas pressure sensor comprises a power supply interface, a ground connection interface, a positive output voltage interface and a negative output voltage interface, and described power supply interface is connected with a direct current single supply.
3. oxygenerator control device for detecting respiratory according to claim 2, it is characterized in that, described operational amplification circuit comprises an operational amplifier, a resistance R 1 and a resistance R 2, the positive pole of described operational amplifier links to each other with described positive output voltage interface, negative pole links to each other with described negative output voltage interface by described resistance R 1, described resistance R 2 one ends link to each other with the negative pole of described operational amplifier, and an end links to each other with the outfan of described operational amplifier.
4. device for detecting respiratory is used in oxygenerator control according to claim 3, it is characterized in that, described resistance R 2 is 450～550 with the ratio of resistance R 1.
5. device for detecting respiratory is used in oxygenerator control according to claim 4, it is characterized in that, described resistance R 2 is 500 with the ratio of resistance R 1.
6. device for detecting respiratory is used in oxygenerator control according to claim 3, it is characterized in that described operational amplifier is the operational amplifier of single power supply.
7. use device for detecting respiratory according to claim 3,4,5 or 6 described oxygenerator controls, it is characterized in that, comprise that also one is connected the amplifier imbalance adjustment circuit between described gas pressure sensor and the described operational amplifier.
8. device for detecting respiratory is used in oxygenerator control according to claim 7, it is characterized in that, it is a potentiometer that circuit is adjusted in described amplifier imbalance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920246833 CN201524080U (en) | 2009-11-06 | 2009-11-06 | Breathing detection device for oxygenator controlling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920246833 CN201524080U (en) | 2009-11-06 | 2009-11-06 | Breathing detection device for oxygenator controlling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201524080U true CN201524080U (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920246833 Expired - Fee Related CN201524080U (en) | 2009-11-06 | 2009-11-06 | Breathing detection device for oxygenator controlling |
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| Country | Link |
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| CN (1) | CN201524080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413033A (en) * | 2015-12-30 | 2016-03-23 | 中国医科大学附属第一医院 | Control method and device for improving effective utilization ratio of oxygen during noninvasive ventilation |
-
2009
- 2009-11-06 CN CN 200920246833 patent/CN201524080U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413033A (en) * | 2015-12-30 | 2016-03-23 | 中国医科大学附属第一医院 | Control method and device for improving effective utilization ratio of oxygen during noninvasive ventilation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20121106 |