CN202654482U - Capacitive infusion alarm device - Google Patents
Capacitive infusion alarm device Download PDFInfo
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- CN202654482U CN202654482U CN 201220315263 CN201220315263U CN202654482U CN 202654482 U CN202654482 U CN 202654482U CN 201220315263 CN201220315263 CN 201220315263 CN 201220315263 U CN201220315263 U CN 201220315263U CN 202654482 U CN202654482 U CN 202654482U
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- infusion
- proximity switch
- capacitive proximity
- alarm
- transfusion
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Abstract
The utility model provides a capacitive infusion alarm device, which comprises an infusion observation tube which is arranged on a traditional infusion device and used for observing the infusion state and the flowing speed. The infusion alarm device is characterized in that a capacitive approach switch which is used for detecting whether liquid medicine is completely infused or not is arranged on one side of the infusion observation tube, and connected with a power supply, a switch and an alarm device to form a closed circuit; and the capacitive approach switch sends out a signal and transmits the signal to the alarm device when the liquid medicine is completely infused. The capacitive infusion alarm device is used on the traditional infusion device in a supporting way, when the liquid medicine level in the infusion tube flows through the area, an alarm circuit is triggered because a capacitor medium changes, and a buzzer sends out voice alarm, so that a nursing person pulls up the infusion tube as soon as possible, burden of the patient and the accompanying person can be reduced, and unnecessary problems even risks can be avoided.
Description
Affiliated technical field
This utility model relates to medical and hygiene article field and electronic equipment field, a kind of infusion alarm for supporting traditional medical transfusion device use, can be when medicinal liquid be failed to the greatest extent, sending immediately buzzing reports to the police, the prompting ward pulls out tube for transfusion as early as possible, reduce patient and those who accompany the bed's burden, avoided unnecessary trouble even danger.
Background technology
At present, known infusion alarm mainly contains three kinds according to operation principle: a kind of is the electric conductivity of utilizing liquid,, drops at liquid level and to send alarm signal when obstructed between two syringe needles as electrode with two metal needles.But this infusion alarm can pollute medicinal liquid, so generally do not supported owing to directly contact with medicinal liquid; Also have a kind of be in infusion process along with the alleviating of liquid bottle weight, change and drive circuit buzzer warning by sense weight.Operating process was comparatively loaded down with trivial details when this infusion alarm used, and sensitivity is low, neither a kind of preferably infusion alarming mode; Last a kind of by being fixed on the photoelectric sensor on the tube for transfusion, whether be totally lost thereby utilize reflection of light or refraction situation to detect medicinal liquid.
Last a kind of infusion alarm is comparatively ripe at present, but owing to adopt the level detection method, and relate to Photoelectric Detection, there are equally the deficiencies such as sensitivity is low, capacity of resisting disturbance is weak.In addition, the method is not suitable for the injection of part lucifuge medicine.
The Chinese patent Granted publication, CN2794523, name is called the patent of infusion alarm, and this infusion alarm contains a box, is provided with the extension loop on the top of box; Inner bottom surface at box is provided with spacing hole; One cover observing and controlling mechanism and alarm mechanism is installed in box, made infusion alarm.This infusion alarm can in time be sounded when the liquid in the infusion bottle is totally lost, the infusion bottle of reminding medical personnel to pull out transfusion needle or more renew.What this infusion alarm relied on is gravity emotion bottle, respond to insensitively, and it is inapplicable that bottle transfusion and plastic bottle are infused, because the empty bottle of unlike material varies in weight.
So be badly in need of designing and developing a kind of, reliable sensitive infusion alarm comes the defective of alarm in the quasi-complement existing market.
The utility model content
Existing infusion alarm contact medicinal liquid, sensitivity are low in order to overcome, a little less than the capacity of resisting disturbance, the deficiency such as operation inconvenience, this utility model provides a kind of novel capacitance-type infusion alarm, this infusion alarm is owing to adopt capacitance type sensor as checkout gear, have simple in structure, highly sensitive, temperature stability is good, dynamic response characteristic is good, strong adaptability, the advantage such as cheap, can effectively detect the transfusion situation.
The technical scheme that its technical problem that solves this utility model adopts is:
The condenser type infusion alarm, comprise that one is arranged on a transfusion observing tube for observation transfusion state and flow velocity on the traditional infusion device, it is characterized in that, transfusion observing tube one side arranges one for detection of being in whether defeated to the greatest extent capacitive proximity switch of medicinal liquid, and capacitive proximity switch connects power supply, switch, alarm and forms closed circuit; Capacitive proximity switch sent signal when medicinal liquid was failed to the greatest extent, and sent signal to alarm.
Capacitive proximity switch comprises capacitor plate, trigger generator, demodulator, trigger, the output driver that connects in turn, and capacitor plate is close to the transfusion observing tube, output driver access closed circuit.
The capacitance C=ε S/d of capacitive proximity switch, wherein, ε is dielectric constant, S is the capacitor plate area, and d is the capacitor plate spacing, when S, d are definite value, the C value only and ε relation is arranged, medicinal liquid variation in the transfusion viewer is the ε value and changes, and then capacitance variation, and capacitive proximity switch sends signal.
The detection distance of capacitive proximity switch is 2～8mm.
The electrode spacing of capacitive proximity switch is 2mm.
Alarm is that buzzer is or/and light alarm.Perhaps other similar devices.
Whether the beneficial effects of the utility model are, can effectively detect medicinal liquid in non-contacting mode and be totally lost, and send buzzing and report to the police, and the prompting ward pulls out tube for transfusion as early as possible, reduces patient and those who accompany the bed's burden, avoids unnecessary trouble even danger.In addition, adopt open capacitance detecting switch, circuit is simple and reliable.
Description of drawings
In order to be illustrated more clearly in innovation of the present utility model and specific embodiments, the below will simply introduce the required accompanying drawing of this utility model.
Fig. 1 is the circuit theory diagrams of condenser type infusion alarm described in the utility model.
Fig. 2 is the normally closed type capacitive proximity switch schematic diagram of condenser type infusion alarm described in the utility model.
Fig. 3 a is that detected state has the medicinal liquid sketch map.
Fig. 3 b is that detected state is without the medicinal liquid sketch map.
Among the figure: 1. normally closed type capacitive proximity switch, 2. power supply, 3. switch, 4. buzzer, 5. Detection capacitance pole plate induction zone, 6. agitator, 7. demodulator, 8. trigger, 9. output driver, 10. transfusion observing tube, 11. Detection electrodes, 12. induction regions.
The specific embodiment
For technological means, creation characteristic that this utility model is realized, reach purpose with effect is easy to understand, below in conjunction with illustrating and specific embodiment, further set forth this utility model.
This utility model principle is:
Adopt non-contact capacitive formula sensor as the infusion test element, tube for transfusion is fixed between the two-plate of detection appearance, mix the formation medium with air, capacitance C=ε S/d
Determined by polar plate area, polar plate spacing and dielectric constant.Now polar plate area, polar plate spacing are set to fixed size, and its capacitance is just decided by dielectric constant, are namely determined by condenser dielectric.During the tube for transfusion normal infusion, capacitor dielectric is made of jointly air, tube for transfusion and tube for transfusion inner liquid medicine.When medicinal liquid is about to be totally lost and liquid level during through the induction region between the electric capacity two-plate, the medicinal liquid in the capacitor dielectric will be replaced by air.Because the dielectric constant of water is about 78.5, the dielectric of air often is about 0, so make thus capacitance size occur significantly to change, triggers the buzzer warning prompting with this drive circuit, is about to be totally lost thereby detect medicinal liquid.
In circuit theory diagrams shown in Figure 1, the application of normally closed type capacitive proximity switch 1 is the innovative point of this utility model, with after power supply 2 is connected by switch 3, forms testing circuit.When the transfusion observing tube 10 in the induction region 12 of normally closed type capacitive proximity switch 1 front end had medicinal liquid, normally closed type capacitive proximity switch 1 was in open mode, and namely 4 liang of inputs of buzzer open circuit, and no current produces in the circuit.When transfusion observing tube 10 medicinal liquids in the induction region 12 of normally closed type capacitive proximity switch 1 front end were failed to the greatest extent, the medicinal liquid medium was replaced by air.Thereby trigger normally closed type capacitive proximity switch 1 closure, 4 liang of inputs of buzzer have electric current to produce buzzer 4 sounding alarms immediately.
The detection distance of capacitive proximity switch is 2～8mm.
The electrode spacing of capacitive proximity switch is 2mm.
Alarm is that buzzer is or/and light alarm.Perhaps other similar devices.
In normally closed type capacitive proximity switch 1 schematic diagram shown in Figure 2, transfusion observing tube 10 will be in the Detection capacitance pole plate induction zone 5, when transfusion observing tube 10 herb liquid liquid levels are flowed through this zone, with trigger generator 6, by demodulator 7, trigger 8, output driver 9 this electrical signal conversion is become the contactor signal again, control thus buzzer 4 sounding alarms.
In detection architecture figure shown in Figure 3, two Detection electrodes 11 consist of an open capacitor, will form the induction region 12 that is made of electric field during work between Detection electrode, and this moment, Detection electrode 11 was fixed, and affected so capacitance size is changed by medium only.When having medicinal liquid to flow in the transfusion observing tube 10 in locating out this induction region 12, medium is made of transfusion observing tube 10, pipe inner liquid medicine and part air, when the medicinal liquid liquid level is flowed through induction region 12, the medicinal liquid of medium sky will be replaced by air, thereby trigger 1 work of normally closed type capacitive proximity switch, buzzer 4 sounding alarms.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; this utility model is not restricted to the described embodiments; that describes in above-described embodiment and the description just illustrates principle of the present utility model; this utility model also has various changes and modifications under the prerequisite that does not break away from this utility model spirit and scope, and these changes and improvements all fall in claimed this utility model scope.The claimed scope of this utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. condenser type infusion alarm, comprise that one is arranged on a transfusion observing tube for observation transfusion state and flow velocity on the traditional infusion device, it is characterized in that, transfusion observing tube one side arranges one for detection of being in whether defeated to the greatest extent capacitive proximity switch of medicinal liquid, and capacitive proximity switch connects power supply, switch, alarm and forms closed circuit; Capacitive proximity switch sent signal when medicinal liquid was failed to the greatest extent, and sent signal to alarm.
2. condenser type infusion alarm according to claim 1, it is characterized in that: capacitive proximity switch comprises capacitor plate, trigger generator, demodulator, trigger, the output driver that connects in turn, capacitor plate is close to the transfusion observing tube, output driver access closed circuit.
3. condenser type infusion alarm according to claim 1, it is characterized in that: the capacitance C=ε S/d of capacitive proximity switch, wherein, ε is dielectric constant, and S is the capacitor plate area, d is the capacitor plate spacing, when S, d are definite value, the C value only and ε relation is arranged, the medicinal liquid in the transfusion viewer changes and is the variation of ε value, and then capacitance variation, capacitive proximity switch sends signal.
4. condenser type infusion alarm according to claim 1 is characterized in that: the detection distance of capacitive proximity switch is 2～8mm.
5. condenser type infusion alarm according to claim 1, it is characterized in that: the electrode spacing of capacitive proximity switch is 2mm.
6. condenser type infusion alarm according to claim 1, it is characterized in that: alarm is that buzzer is or/and light alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220315263 CN202654482U (en) | 2012-06-29 | 2012-06-29 | Capacitive infusion alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220315263 CN202654482U (en) | 2012-06-29 | 2012-06-29 | Capacitive infusion alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202654482U true CN202654482U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220315263 Expired - Fee Related CN202654482U (en) | 2012-06-29 | 2012-06-29 | Capacitive infusion alarm device |
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| Country | Link |
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| CN (1) | CN202654482U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920703A (en) * | 2016-05-19 | 2016-09-07 | 王卫东 | Infusion flow rate monitoring instrument |
| CN107050571A (en) * | 2017-06-06 | 2017-08-18 | 吉林师范大学 | A kind of constant temperature transfusion system monitoring system of adjusting dropping speed |
| CN108245739A (en) * | 2018-02-06 | 2018-07-06 | 钱月珍 | Medical transfusion margin monitoring device |
| CN113893059A (en) * | 2021-09-10 | 2022-01-07 | 河南牧原智能科技有限公司 | Needleless injection device and liquid medicine detection device thereof |
-
2012
- 2012-06-29 CN CN 201220315263 patent/CN202654482U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920703A (en) * | 2016-05-19 | 2016-09-07 | 王卫东 | Infusion flow rate monitoring instrument |
| CN105920703B (en) * | 2016-05-19 | 2022-06-03 | 中国人民解放军总医院 | Infusion flow monitor |
| CN107050571A (en) * | 2017-06-06 | 2017-08-18 | 吉林师范大学 | A kind of constant temperature transfusion system monitoring system of adjusting dropping speed |
| CN108245739A (en) * | 2018-02-06 | 2018-07-06 | 钱月珍 | Medical transfusion margin monitoring device |
| CN113893059A (en) * | 2021-09-10 | 2022-01-07 | 河南牧原智能科技有限公司 | Needleless injection device and liquid medicine detection device thereof |
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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: 20130109 Termination date: 20130629 |