CN202002675U - Controllable digital oxygen flow meter - Google Patents
Controllable digital oxygen flow meter Download PDFInfo
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- CN202002675U CN202002675U CN2011200367563U CN201120036756U CN202002675U CN 202002675 U CN202002675 U CN 202002675U CN 2011200367563 U CN2011200367563 U CN 2011200367563U CN 201120036756 U CN201120036756 U CN 201120036756U CN 202002675 U CN202002675 U CN 202002675U
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- oxygen
- flow meter
- oxygen flow
- chip microcomputer
- pressure transducer
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Abstract
The utility model relates to a controllable digital oxygen flow meter, which is especially applicable to measurement of oxygen flow in the field of oxygen supply in medical treatment or households. The controllable digital oxygen flow meter takes a single chip microcomputer as a core, under the support of a power supply module, the oxygen demand and the oxygen transfer time of a patient in unit time is input by a keyboard; the single chip microcomputer drives a motor to control a motor control valve by typing information so as to open a low-pressure oxygen transfer pipeline; a pressure sensor measures the pressure of gas in a buoy sealing chamber in real time and is connected with the single chip microcomputer by an A/D converter after passing through an amplifier; and the output end of the single chip microcomputer is connected with a display, an alarm and the like. In the controllable digital oxygen flow meter, after the infusion is finished, oxygen supply can be stopped automatically, and automatic alarming can be achieved; in addition, the controllable digital oxygen flow meter has the characteristics that the metering is accurate, the operation is simple and the digital display is intuitive and the like; and in the process of oxygen transfer, cumulative metering can be carried out on discontinuous oxygen transfer, the use is convenient, safe and comfortable, the psychological burden of the patient for the oxygen transfer safety problem can be reduced, and the dispute between a doctor and the patient due to inaccurate metering can also be greatly reduced.
Description
Technical field
The utility model relates to a kind of gas meter, especially for the metering of the oxygen flow in the medical field.
Background technology
Development along with medical science, oxygen therapy is used widely in medical treatment, oxygen medical science is as one in the modern medicine emerging comprehensive frontier branch of science, be widely used in clinical, ICU, the emergency department, oxygen therapy has become an important component part of medical field as a kind of special treatment means.
The oxygen flow meter that hospital is commonly used is the Medical Devices of country and army's compulsory verification, and its quality condition more and more is subjected to people's attention.At present the oxygen inhalation mode that provides of hospital mainly contains two kinds: a kind of is only with the inhalator of flowmeter wetting bottle; Another kind is a medical industry float type oxygen inhalation apparatus commonly used, because they lack necessary quantitative Analysis means, medical personnel can only determine specific discharge by rough observation, simultaneously also lack real-time time keeping, even under anaerobic conditions also as being oxygen time.Measure way accurately and effectively owing to lack one, and the charge of medical oxygen still continues to use metered mode in the past, this both inaccurate also unscientific metering system, usually between doctors and patients owing to metering with charging problem produces misunderstandings and contradiction.
Chinese patent CN03284742.4 discloses a kind of medical oxygen flowmeter measuring device, comprise an air intake and a sealed air chamber that has variable valve, in sealed air chamber, be placed with pressure transducer, pressure transducer is connected with a single-chip microcomputer by A/D converter, the output terminal of single-chip microcomputer connects a display, on the blanket gas locular wall, be provided with the output terminal of metering hole, be provided with retaining ring between pressure transducer and the A/D converter as oxygen.Though this patent has solved the flow metering problem to oxygen, reduced to a certain extent between patient and the hospital owing to the inaccurate dispute that causes of metering.But still have following shortcoming: 1) error in dipping is bigger; 2) flow detection and the record of single can only be carried out, repeatedly flow metering and oxygen time record can not be accumulated; 3) can not carry out discontinuity oxygen therapy, lack convenience; 4) off switch valve automatically after oxygen therapy finishes causes excessive oxygen therapy; 5) oxygen therapy finishes and can not report to the police automatically etc.Therefore, each clinical pressing for oxygen unit a kind ofly not only easily and effectively but also the oxymeter measuring device of safety is accurately measured patient's oxygen absorbed, can reduce the oxygen therapy dispute between the doctors and patients on the one hand, improves the comfort level and the security of patient when curing by oxygen therapy on the other hand.
The utility model content
The utility model technical issues that need to address provide a kind of real-time Detection ﹠ Controling that can realize oxygen flow, and accuracy, science and the security that can improve oxygen flow meter reduce the oxygen flow meter of fault accidents such as medical peroxide infringement.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
Controllable type numeral oxygen flow meter, comprise the pressure transducer that is connected with oxygen buoy chamber, the A/D converter that is connected with the output terminal of pressure transducer, and the single-chip microcomputer that is connected with the A/D converter output terminal, the output terminal of single-chip microcomputer connects display, the input end of described single-chip microcomputer is connected with the keyboard and the power module of pause button, and the output terminal of single-chip microcomputer connects the motor control valve that is arranged in the low pressure oxygen therapy pipeline through motor, and described power module is connected with motor.
Principle of work of the present utility model is as described below:
At first, the pressure transducer of controllable type numeral oxygen flow meter is connected to the gas outlet of oxygen buoy chamber, motor control valve is installed in the low pressure oxygen therapy pipeline.When needs are cured by oxygen therapy, according to the unit interval oxygen demand and the oxygen therapy time of needs of patients, be input in the single-chip microcomputer by keyboard, valve, the reduction valve of welding bottle are opened, press the job key of lower keyboard, motor is cured by oxygen therapy pipeline with low pressure and is opened according to the instruction starter motor operation valve of single-chip microcomputer, begins the patient is exported oxygen.This moment, pressure transducer detected the force value of oxygen buoy chamber, and after amplifier amplifies signal, export to A/D converter, A/D converter is to be transferred to single-chip microcomputer after the digital signal with analog signal conversion, single-chip microcomputer compares with setting the oxygen therapy amount current oxygen flow value, and when the two was equal, single-chip microcomputer sent the disable motor signal, the Electric Machine Control motor control valve is cured by oxygen therapy closedown of pipeline with low pressure, stops oxygen therapy.
When in the oxygen therapy process, when needing to suspend oxygen therapy, can suspend oxygen therapy by the Pause key of lower keyboard, this moment, single-chip microcomputer was no longer counted; When needs start once more, can continue oxygen therapy by definite key, this moment, single-chip microcomputer continued counting on the basis of counting last time, finished up to whole oxygen therapy process, and oxygen therapy finishes the back single-chip microcomputer oxygen flow is carried out automatic clear.
Improvement of the present utility model is: be provided with the amplifier that is used for the signal amplification between described pressure transducer and the A/D converter.Pressure transducer adopts the constant current source power supply mode, and amplifier carries out error free amplification to the small-signal of pressure transducer output, exports to the A/ converter then.
The improvement of power module described in the utility model is: power module comprises the detection module that exchanges input interface, chargeable dc-battery and be used to detect battery electric quantity, and its mode of operation is that alternating current-direct current switches power supply.Promptly when outside 220V alternating current is imported, adopt the AC-powered pattern, and to chargeable dc-battery charging; When no external power source, use inner chargeable dc-battery power supply, guarantee the oxygen flow meter operate as normal; The power supply detection module is used for detecting in real time battery electric quantity, when electric weight is lower than scheduled voltage, sends a signal to single-chip microcomputer, and single-chip microcomputer is controlled alarm equipment alarm again, and notice is changed battery.
Further improvement of the utility model is: oxygen flow meter also is provided with the alarm that is connected with single-chip microcomputer.Alarm has two functions, and one when oxygen demand equates with current oxygen flow value, is promptly cured by oxygen therapy when finishing alarm equipment alarm; Its two, when the electric weight of battery in the power module is lower than scheduled voltage, report to the police.
Improvement of the present utility model also is: oxygen flow meter also is provided with the relay indicating light that is connected with single-chip microcomputer.Relay indicating light is used for indicating the duty of oxygen flow meter and the electric weight of power module battery.
The improvement of pressure transducer described in the utility model is: described pressure transducer is provided with the gas interface that is connected with oxygen buoy chamber, is provided with O-ring seal between described gas interface and the pressure transducer.
The improvement of described display is: display is provided with duty viewing area, unit oxygen flow viewing area, patient's oxygen demand zone and current oxygen therapy amount viewing area.
The improvement of described keyboard is: also be provided with setting key on the keyboard, determine key, job key and numerical key, key in patient's unit interval oxygen demand and oxygen time by the numerical key of operation keyboard, determine that the errorless back of oxygen demand begins oxygen supply by job key.When in the oxygen therapy process, finding that oxygen demand is wrong, can re-enter oxygen demand by setting key, this process does not influence the metering of oxygen flow.
Because the technical progress of having adopted technique scheme, the utility model to obtain is:
The utility model is simple in structure, volume is less, intuitive display and measuring accuracy height, can realize oxygen uptake at regular time and quantity, has the discontinuity metering, and after finishing, the oxygen therapy process reports to the police, stops the function of oxygen supply automatically, coefficient easy to use, safe is higher, the practicality and the security of system have been improved greatly, alleviated hospital care personnel's working strength, and patient and entourage's stress, improve work efficiency and service quality, reduced the doctor-patient dispute and the malpractice that occur in the curative activity to greatest extent.The utility model is also applicable to the metering of the gas flow of family's oxygen supply or other field.
The amplifier that is provided with between the utility model pressure transducer and the A/D converter can carry out error free amplification to the small-signal of pressure transducer output, makes the small-signal of gathering be converted to the large-signal of easy resolution, improves measuring accuracy of the present utility model.Power module is set to the mode of operation that alternating current-direct current switches power supply, promptly when outside 220V alternating current is imported, adopts the AC-powered pattern, and to chargeable dc-battery charging; When no external power source, use inner chargeable dc-battery power supply, guarantee flowmeter measuring device operate as normal; The power supply detection module is used for detecting in real time battery electric quantity, when electric weight is lower than scheduled voltage, and alarm equipment alarm, notice is changed battery, has improved service efficiency of the present utility model greatly.The setting of alarm not only can be reported to the police to oxygen flow, can also report to the police to the electric weight of rechargeable battery in the power module, improved hommization of the present utility model greatly, even medical personnel in time do not observe, the utility model also can in time be reminded, and has alleviated medical personnel's working pressure.Relay indicating light equally both can have been represented the duty of flowmeter, can represent the electric weight of rechargeable battery in the power module again, had suggesting effect equally.The O-ring seal that is provided with between pressure transducer gas interface and the pressure transducer can fully guarantee the pressure of whole oxygen therapy process oxygen and the sealing property of curing by oxygen therapy pipeline.The display subregion is provided with, and can carry out simple and clear demonstration to the required information of knowing, thereby reduces doctor-patient dispute.The setting of various buttons on the keyboard, the startup that can cure by oxygen therapy easily, time-out and replacement make use of the present utility model hommization more.
Description of drawings
Fig. 1: electrical connection diagram of the present utility model;
Fig. 2: application synoptic diagram of the present utility model.
Wherein: 1. high-pressure oxygen cylinder, 2. high-pressure oxygen cylinder switch, 3. reduction valve, 4. motor, 5. motor control valve, 6. gas outlet, 7. oxygen outlet, 8. wetting bottle, 9. flow control switch, 10. buoy chamber, 11. gas interfaces, 12. pressure transducer, 13.A/D converter, 14. amplifiers, 15. keyboard, 16. displays, 17. alarms, 18. relay indicating light, 19. single-chip microcomputers, 20. power modules.
Embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is done further to describe in detail:
A kind of controllable type numeral oxygen flow meter, comprise pressure transducer 12, amplifier 14, A/D converter 13, single-chip microcomputer 19, display 16, keyboard 15, power module 20, alarm 17, relay indicating light 18, motor 4 and motor control valve 5, the electric connecting relation between each several part as shown in Figure 1.Pressure transducer is connected with oxygen buoy chamber, is used to measure the pressure of buoy indoor oxygen; The A/D converter that the output terminal of pressure transducer connects through amplifier, amplifier pass to A/D converter after with the error free amplification of the small-signal of the transmission of pressure transducer, carry out analog to digital conversion; A/D converter passes to single-chip microcomputer with simulating signal again.The input end of single-chip microcomputer connects keyboard and power module respectively, output terminal connects alarm, relay indicating light, motor and display, the information that single-chip microcomputer is keyed in according to keyboard, under the support of power module, signal in conjunction with the pressure transducer measurement, through the keying of Electric Machine Control motor control valve, realize the startup of oxygen therapy process and close; Display can carry out the subregion to required content displayed and show under the instruction of single-chip microcomputer.
Power module comprises the detection module that exchanges input interface, chargeable dc-battery and be used to detect battery electric quantity, and its mode of operation is that alternating current-direct current switches power supply.Promptly when outside 220V alternating current is imported, adopt the AC-powered pattern, and to chargeable dc-battery charging; When no external power source, use inner chargeable dc-battery power supply, guarantee flowmeter measuring device operate as normal; The power supply detection module is used for detecting in real time battery electric quantity, when electric weight is lower than scheduled voltage, sends a signal to single-chip microcomputer, and single-chip microcomputer is controlled alarm equipment alarm again, and notice is changed battery.
Alarm is realized two functions under the control of single-chip microcomputer, one, and when the setting oxygen demand equates with current oxygen flow value, alarm equipment alarm; Its two, when the electric weight of battery in the power module is low, report to the police.Relay indicating light is used for indicating the duty of oxygen flow meter and the electric weight of power module battery.Display is provided with duty viewing area, unit oxygen flow viewing area, patient's oxygen demand zone and current oxygen therapy amount viewing area.Also be provided with setting key on the keyboard, determine key, job key, numerical key and Pause key, key in patient's oxygen demand, determine that the errorless back of oxygen demand begins oxygen supply by job key by the numerical key of operation keyboard; When finding that in the oxygen therapy process oxygen demand is wrong, re-enter oxygen demand by setting key, this process does not influence the metering of oxygen flow; When in the oxygen therapy process, needing to suspend, press the time-out that Pause key can be cured by oxygen therapy.
The patient that the utility model is applied in the medical procedure carries out oxygen uptake, and its concrete annexation as shown in Figure 2.The motor control valve 5 of oxygen flow meter is installed in the low pressure oxygen therapy pipeline, and an end of low pressure oxygen therapy pipeline is through the output terminal of reduction valve 3 connection high-pressure oxygen cylinders 1, and the output terminal of high-pressure oxygen cylinder is provided with high-pressure oxygen cylinder switch 2; The other end of low pressure oxygen therapy pipeline connects the wetting bottle 8 that has buoy chamber 10, is provided with flow control switch 9 between buoy chamber and the wetting bottle.The top of buoy chamber is provided with gas outlet 6, and gas outlet 6 is connected with the gas interface 11 of pressure transducer 12 through pipeline, is provided with sealing gasket between gas interface and pressure transducer and gas outlet and the buoy chamber, to guarantee the pressure of oxygen.The top of wetting bottle is provided with oxygen outlet 7, and oxygen is exported to the patient through oxygen outlet 7, for patient's oxygen uptake.
Principle of work is as described below:
At first, open high-pressure oxygen cylinder switch 2, this moment, oxygen flow to low pressure oxygen therapy pipeline after reduction valve 3 decompressions, because motor control valve is in locking state, did not have oxygen to flow to buoy chamber and wetting bottle, and preliminary work is finished.
When needs are cured by oxygen therapy, be input in the single-chip microcomputer according to the oxygen therapy amount of needs of patients numerical key by keyboard, this moment, patient's oxygen demand zone of display demonstrated required oxygen therapy amount.Press the job key of lower keyboard, relay indicating light is glittering, and motor is cured by oxygen therapy pipeline with low pressure and opened according to the instruction starter motor operation valve of single-chip microcomputer, begins the patient is exported oxygen.This moment, pressure transducer detected the force value of oxygen buoy chamber, and after amplifier amplifies signal, export to A/D converter, A/D converter is to be transferred to single-chip microcomputer after the digital signal with analog signal conversion, single-chip microcomputer compares current oxygen flow value and oxygen demand, when the two is equal, single-chip microcomputer sends disable motor signal and alarm equipment alarm signal, the Electric Machine Control motor control valve is cured by oxygen therapy closedown of pipeline with low pressure, stop oxygen therapy, alarm is reported to the police simultaneously, reminds medical personnel to carry out subsequent operation.
In the oxygen therapy process, the current oxygen therapy amount viewing area of display shows current oxygen therapy amount at random.Certainly in the oxygen therapy process, can regulate flow control switch, at this moment can corresponding unit of display oxygen flow on the display.
When in the oxygen therapy process, when needing to suspend oxygen therapy, can be by the Pause key of lower keyboard, the oxygen therapy process can be suspended, and this moment, single-chip microcomputer was no longer counted; When needs start once more, can continue oxygen therapy by job key, this moment, single-chip microcomputer continued counting on the basis of counting last time, finished up to whole oxygen therapy process.Certainly, in the oxygen therapy process, if when finding that oxygen demand is wrong, can re-enter oxygen demand by setting key, this process does not influence the metering of oxygen flow.
Claims (8)
1. controllable type numeral oxygen flow meter, comprise the pressure transducer (12) that is connected with oxygen buoy chamber, the A/D converter (13) that is connected with the output terminal of pressure transducer, and the single-chip microcomputer (19) that is connected with the A/D converter output terminal, the output terminal of single-chip microcomputer connects display (16), it is characterized in that: the input end of described single-chip microcomputer is connected with keyboard of pause button (15) and power module (20), the output terminal of single-chip microcomputer (19) connects the motor control valve (5) that is arranged in the low pressure oxygen therapy pipeline through motor (4), and described power module is connected with motor (4).
2. controllable type numeral oxygen flow meter according to claim 1 is characterized in that: be provided with the amplifier (14) that is used for the signal amplification between described pressure transducer (12) and the A/D converter (13).
3. controllable type numeral oxygen flow meter according to claim 1, it is characterized in that: described power module (20) comprises the detection module that exchanges input interface, chargeable dc-battery and be used to detect battery electric quantity.
4. controllable type numeral oxygen flow meter according to claim 1, it is characterized in that: oxygen flow meter also is provided with the alarm (17) that is connected with single-chip microcomputer.
5. controllable type numeral oxygen flow meter according to claim 1, it is characterized in that: oxygen flow meter also is provided with the relay indicating light (18) that is connected with single-chip microcomputer.
6. controllable type numeral oxygen flow meter according to claim 1, it is characterized in that: described pressure transducer is provided with the gas interface (11) that is connected with oxygen buoy chamber (10), is provided with O-ring seal between described gas interface and the pressure transducer.
7. controllable type numeral oxygen flow meter according to claim 1 is characterized in that: described display is provided with duty viewing area, unit oxygen flow viewing area, patient's oxygen demand zone and current oxygen therapy amount viewing area.
8. controllable type numeral oxygen flow meter according to claim 1 is characterized in that: also be provided with setting key on the described keyboard, determine key, job key and numerical key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200367563U CN202002675U (en) | 2011-02-11 | 2011-02-11 | Controllable digital oxygen flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200367563U CN202002675U (en) | 2011-02-11 | 2011-02-11 | Controllable digital oxygen flow meter |
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| Publication Number | Publication Date |
|---|---|
| CN202002675U true CN202002675U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200367563U Expired - Fee Related CN202002675U (en) | 2011-02-11 | 2011-02-11 | Controllable digital oxygen flow meter |
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| CN (1) | CN202002675U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896116A (en) * | 2015-05-18 | 2015-09-09 | 阮雪红 | Electronic flow valve for controlling oxygen conveyance |
| CN106730200A (en) * | 2016-12-27 | 2017-05-31 | 北京澳森信息工程技术研究院有限公司 | A kind of digitalization control method of the oxygen inhalation apparatus based on pressure sensor |
| CN111580594A (en) * | 2020-04-29 | 2020-08-25 | 杭州市中医院 | Oxygen consumption assessment dial plate for transfer breathing machine |
-
2011
- 2011-02-11 CN CN2011200367563U patent/CN202002675U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896116A (en) * | 2015-05-18 | 2015-09-09 | 阮雪红 | Electronic flow valve for controlling oxygen conveyance |
| CN106730200A (en) * | 2016-12-27 | 2017-05-31 | 北京澳森信息工程技术研究院有限公司 | A kind of digitalization control method of the oxygen inhalation apparatus based on pressure sensor |
| CN111580594A (en) * | 2020-04-29 | 2020-08-25 | 杭州市中医院 | Oxygen consumption assessment dial plate for transfer breathing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20190211 |
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| CF01 | Termination of patent right due to non-payment of annual fee |