CN205964624U

CN205964624U - Capacitanc infusion sensor

Info

Publication number: CN205964624U
Application number: CN201620633125.2U
Authority: CN
Inventors: 周汉秦; 白元龙
Original assignee: Jiangsu Shun Yuan Group Co Ltd
Current assignee: Jiangsu Shun Yuan Group Co Ltd
Priority date: 2016-06-23
Filing date: 2016-06-23
Publication date: 2017-02-22
Anticipated expiration: 2026-06-23

Abstract

The utility model discloses a capacitanc infusion sensor, including set up the capacitor plate on transfer line upper portion to I with set up at the capacitor plate of transfer line lower part to II, the capacitor plate includes the capacitor plate of two relative settings, every to I and/or capacitor plate to II the capacitor plate is convex the subsides on the lateral wall of transfer line, the tip contactless of the capacitor plate of two relative settings. The utility model discloses capacitanc infusion sensor installs on the transfer line, and the measurement process is not influenced by the transfer line gradient, its susceptibility is high, can do accurate the detection to infusion process and infusion surplus simultaneously, in addition, utilize electric capacity response principle, the low power dissipation, last, no radiant energy does not produce negative effects to the liquid medicine.

Description

A kind of condenser type transfusion sensor

Technical field

This utility model is related to a kind of condenser type transfusion sensor, belongs to technical field of medical equipment.

Background technology

When patient is in hospital transfusion, it usually needs nurse or household's nurse.When liquid is totally lost, if unmanned nurse, Blood back can be caused to bring very big trouble even dangerous to patient.Transfusion sensor is that the important of induction system is guarded in intravenous injection Ingredient, detects patient infusion progress by this sensor, realizes real-time sensing and the monitoring of infusion process, with electronization letter Number in nurse station terminal display transfusion progress and infusion alarming information.According to this information, in infusion process, monitoring medicine according to The speed injection that doctor's advice specifies is it is ensured that use safety and using effect；And send warning at the end of transfusion, point out ward Pull out tube for transfusion, reduce the burden of patient and family members.

Existing transfusion sensor has the sensor using gravity measurement principle, such sensor sensitivity poor it is impossible to Surpluses and transfusion process are done with more accurate measurement.Can only be infused come simple judgment according to default empty bottle/sky bag weight Whether journey is close to end.Also have the sensor utilizing photoelectric measurement, such sensor is clipped on transfusion sighting tube, using drop Fall the disturbance to photosignal as the foundation of count measurement, medicinal liquid injection volume can be calculated according to dripping speed.When no optical telecommunications Number change when judge infuse end send warning.The limitation of the program is requirement when sighting tube of infusing is relative to ground out of plumb It may happen that wrong report, for the strict meaning, the energy of incident ray may impact to sensitive medicaments in addition.Therefore a kind of Sensitivity is high, transfusion process and transfusion surplus can be done with the accurate transfusion sensor judging exploitation is necessary.

Utility model content

Utility model purpose：Technical problem to be solved in the utility model is to provide a kind of condenser type transfusion sensor, This transfusion sensor sensitivity is high, can do accurate judgement to transfusion process and transfusion surplus, and is not affected by tube for transfusion gradient.

For reaching above-mentioned technical purpose, the technical scheme that this utility model is adopted is：

A kind of condenser type transfusion sensor, to I and is arranged on tube for transfusion including the capacitor plate being arranged on tube for transfusion top The capacitor plate of bottom includes two pieces of capacitance poles being oppositely arranged to II, described capacitor plate to I and/or capacitor plate to II Plate, every piece of described capacitor plate is attached on the lateral wall of tube for transfusion in circular arc, described two pieces of capacitor plates being oppositely arranged End does not contact.

Further preferably, every piece of described capacitor plate is stuck on tube for transfusion in circular arc.

Further preferably, every piece of described capacitor plate is foil.

Wherein, described capacitor plate is connected with extraneous capacitive detection circuit to II to I and capacitor plate.

Wherein, the distance between described two pieces of ends of capacitor plate being oppositely arranged are the 1/12～1/ of transfusion pipe diameter 10.

Compared with prior art, this utility model condenser type transfusion sensor has an advantageous effect in that：

First, this utility model condenser type transfusion sensor is arranged on tube for transfusion, and measurement process is not tilted by tube for transfusion Degree impact；

Secondly, this utility model condenser type transfusion sensor sensitivity is high, can transfusion process and transfusion surplus be done simultaneously Accurate detection；

Again, this utility model condenser type transfusion sensor utilizes capacitance induction principle, low in energy consumption；

Finally, the radiationless energy of this utility model condenser type transfusion sensor, does not have a negative impact to medicinal liquid.

Brief description

Fig. 1 is the use state figure of this utility model condenser type transfusion sensor；

Fig. 2 is the top view of Fig. 1；

Fig. 3 is the systematic schematic diagram of this utility model condenser type transfusion sensor.

Specific embodiment

Below in conjunction with the accompanying drawings, technical solutions of the utility model are further described.

As shown in Fig. 1～2, this utility model condenser type transfusion sensor, including the capacitance pole being arranged on tube for transfusion 1 top Plate to I2 and is arranged on the capacitor plate of tube for transfusion bottom to II3, and capacitor plate includes two to I2 and/or capacitor plate to II3 The capacitor plate 4 that block is oppositely arranged, every piece of capacitor plate 4 is attached on the lateral wall of tube for transfusion 1 in circular arc, and capacitor plate is to I2 And/or capacitor plate can be clipped on tube for transfusion 1 by clip to II3, thus convenient dismantle, every piece of capacitor plate 4 is in circular arc Also can be stuck on tube for transfusion 1 by itself radian, every piece of capacitor plate 4 is foil, two pieces of capacitor plates being oppositely arranged 4 End do not contact.

As shown in figure 3, the capacitor plate of this utility model condenser type transfusion sensor to I2 and capacitor plate to II3 with outer Boundary capacitive detection circuit connects, and capacitive detection circuit includes signal conditioning circuit and A/D Acquisition Circuit, capacitive detection circuit with micro- Processor connects, and microprocessor connects display alarm interface.This utility model condenser type transfusion sensor is simultaneously using exchange inspection Survey (dripping speed) and DC detecting (liquid level/warning).

This utility model condenser type transfusion sensor system configuration has double capacitor plates pair, and the capacitor plate I2 on top is used for Detection drips simultaneously count, and then detect transfusion process, and speed is dripped in measurement；The capacitor plate of bottom to II3 transfusion at the end of, In tube for transfusion 1, liquid level has larger capacitance variations when beginning to decline, Use of Emergency Alarm (and prevent from counting inaccurate or initial Amount input is inaccurate).

As the height h=1cm of this utility model condenser type transfusion sensor capacitor plate 4, tube for transfusion 1 caliber d=2cm, Then capacitor plate to I2 and/or capacitor plate to the capacitance of II3 is：

Wherein, E₀For permittivity of vacuum, Er is relative dielectric constant, and d is between two pieces of capacitor plates being oppositely arranged Distance, the relative dielectric constant of air approximates 1 close to vacuum values, and glass dielectric constant is 3.7, and the dielectric constant of water is 80.

The electric capacity C1 of top capacitor plate I2 when tube for transfusion 1 dripless falls it is considered to the glass wall of tube for transfusion 1 test tube, Its relative dielectric constant be E [A1 air+A2 glass], when there being drop to fall, its relative dielectric constant become turn to E [A1 air+ A2 glass+A3 drop], wherein A1, A2, A3 are component coefficient, because drop causes the change of relative dielectric constant, lead to electric capacity The capacitance C1 of pole plate I2 changes, and thus can detect that drop drips speed.

Bottom capacitor plate keeps constant to the electric capacity C2 of II3 during transfusion is carried out, when transfusion terminates liquid level decline Great changes will take place for meeting, would fall to 1/80 (relative dielectric constant drops to 1 from 80) of quiescent value, this signal will be for doing Report to the police, point out transfusion to be over needing to process at once.

This utility model condenser type transfusion sensor adopts measurement by capacitance, and signal readout process circuit is ripe, and robust Property is high, low in energy consumption, be difficult to be disturbed.

The above, be only preferred embodiment of the present utility model, not this utility model is made any formal Restriction although this utility model is disclosed above with preferred embodiment, but be not limited to this utility model, any ripe Know professional and technical personnel, in the range of without departing from technical solutions of the utility model, when in the technology of available the disclosure above Hold and make a little Equivalent embodiments changing or be modified to equivalent variations, as long as without departing from technical solutions of the utility model Hold, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, all Still fall within the range of technical solutions of the utility model.

Claims

1. a kind of condenser type transfusion sensor it is characterised in that：Including being arranged on the capacitor plate on tube for transfusion top to I and setting To II, described capacitor plate includes two pieces and is oppositely arranged capacitor plate in tube for transfusion bottom to I and/or capacitor plate to II Capacitor plate, every piece of described capacitor plate is attached on the lateral wall of tube for transfusion in circular arc, described two blocks of electric capacity being oppositely arranged The end of pole plate does not contact.

2. condenser type transfusion sensor according to claim 1 it is characterised in that：Every piece of described capacitor plate is in circular arc It is stuck on tube for transfusion.

3. condenser type transfusion sensor according to claim 1 it is characterised in that：Every piece of described capacitor plate is metal foil Piece.

4. condenser type transfusion sensor according to claim 1 it is characterised in that：Described capacitor plate is to I and capacitance pole Plate is connected with extraneous capacitive detection circuit to II.

5. condenser type transfusion sensor according to claim 1 it is characterised in that：Described two pieces of capacitance poles being oppositely arranged The distance between end of plate is the 1/12～1/10 of transfusion pipe diameter.