CN205515804U - Transfusion reminding apparatus - Google Patents
Transfusion reminding apparatus Download PDFInfo
- Publication number
- CN205515804U CN205515804U CN201620073092.0U CN201620073092U CN205515804U CN 205515804 U CN205515804 U CN 205515804U CN 201620073092 U CN201620073092 U CN 201620073092U CN 205515804 U CN205515804 U CN 205515804U
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- China
- Prior art keywords
- circuit
- signal conditioning
- infusion
- warning device
- signal
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- Expired - Fee Related
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Abstract
The utility model provides a transfusion reminding apparatus, include the resonance inductor that forms with the wire coiling, the transfer line twines in the interval of resonance inductor wire, still includes pump circuit, signal conditioning circuit, master control circuit and warning circuit, and resonance inductor series resistor connects the pump circuit, with resistance both ends signal connection signal conditioning circuit, inserts master control circuit with signal conditioning circuit output, and master control circuit connects warning circuit. When the infusion finished, resonance inductor natural frequency rose, made it take place the vibration at the natural frequency point through exert the excitation for the resonance inductor, produced variable ratio frequency changer square signal by signal conditioning circuit again, and whether this signal is delivered to master control circuit, by the master control circuit measuring -signal frequency, whether has liquid in the judgement transfer line, report to the police. This device can remind medical personnel to change dressings or pull out the needle by automatic alarm when the infusion is about to finish, utilize coil natural frequency's change to confirm whether remain liquid, get rid of other factors and disturb, make its judgement more accurate.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of infusion warning device.
Background technology
Hospital to carry out substantial amounts of infusion treatment in clinic, when infusion bottle inner liquid medicine residue is few, needs artificial prompting nurse immediately to process.Once patient falls asleep and nobody's nurse on the scene again, and nurse is also not free to make a round of visits, it is impossible to process in time, it may occur that " blood back ".Patient or caregiver are the most arduous.
Existing infusion warning device patent, such as Publication No. CN204484944U, the patent of CN202128752U, CN104800930A, CN101961515A, CN02283380U, use Photoelectric Detection mode, insensitive to the liquid of opaque and easy wall built-up, the change of ambient light easily causes to be failed to report or reports by mistake；Publication No. CN204050488U, the patent of CN204352301U, CN2631519Y, CN104623761A, CN204017005U, the weight weighing infusion bottle is used to detect transfusion the most complete, the detection method weighed, principle simply facilitates implementation and cost is the highest, but the specification that its shortcoming is medicine bottle varies in weight, need to be manually entered alarm threshold value during use, use more inconvenience；The patent of Publication No. CN102553021A, uses Hall detection method, and it disadvantage is that and be placed in medicinal liquid by detecting element, easily pollutes medicinal liquid.
Utility model content
This utility model provides a kind of infusion warning device.
In order to solve above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of infusion warning device, including with the resonance coil 1 of wire coiling, tube for transfusion 2 is wound around in the spacing of resonance coil 1 wire, also include exciting circuit, signal conditioning circuit, governor circuit and warning circuit, resonance coil 1 series resistor connects exciting circuit, resistance two end signal being accessed signal conditioning circuit, signal conditioning circuit output is accessed governor circuit, governor circuit connects warning circuit.
Preferably, also include housing 3, housing 3 is hollow circular tube, housing 3 outer surface arranges the linear guide groove 4 of uniform spiral distribution, it is parallel direction coiling resonance coil 1 with guide groove in guide groove 4 spacing, tube for transfusion 2 is wound in guide groove 4, and housing 3 is internal arranges circuit board 5, and circuit board 5 arranges exciting circuit, signal conditioning circuit, governor circuit and warning circuit.
Preferably, exciting circuit includes audion and agitator.
Preferably, signal conditioning circuit includes operational amplifier and buffer.
Preferably, governor circuit includes STM32 single-chip microcomputer.
Preferably, warning circuit includes that buzzer and buzzer drive.
Preferably, warning circuit includes light emitting diode.
Preferably, also including power circuit, power circuit includes rechargeable battery voltage stabilizing chip and filter capacitor.
Preferably, the material of housing is plastics.
Preferably, housing 3 wall thickness is 8mm, and resonance coil 1 is wide is 4.5mm with height, is 4.5mm with guide groove 4 apart from 0.75mm, the groove depth of guide groove 4 and groove width, and separation is 6mm.
This utility model is by measuring the change of resonance coil natural frequency, the presence or absence of perception liquid: the liquid in tube for transfusion is electrolyte, the presence or absence of electrolyte, can cause resonance coil inductance and parasitic capacitance thereof to change, thus causes the natural frequency of resonance coil to change.In infusion process, having electrolytic liquid to flow through, resonance coil natural frequency is relatively low always；When infusion-completed, in tube for transfusion, no liquid flows through, and resonance coil natural frequency raises.Make it vibrate at natural frequency point by applying excitation to resonance coil, then by signal conditioning circuit, produce variable ratio frequency changer square-wave signal, this signal is sent to governor circuit, measured signal frequency by governor circuit, and by the size of determination frequency, whether judgement tube for transfusion has liquid.
The beneficial effects of the utility model are: medical personnel can be reminded to change dressings or pull out pin by automatic alarm when transfusion closes to an end；Utilize inductance coil to accomplish transfusion reminding, save material, convenient making；This utility model utilizes inductance variable quantity to determine whether remaining liq, easily determines, eliminates the interference of other factors so that it is it is more accurate to judge；This device, without family members or patient nursing, facilitates patient and family members to have a rest.
Accompanying drawing explanation
With detailed description of the invention, this utility model is further described below in conjunction with the accompanying drawings:
Fig. 1 is schematic diagram of the present utility model；
Fig. 2 is control flow chart of the present utility model；
Fig. 3 is the functional block diagram being embodied as circuit；
Fig. 4 is implementing circuit schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described:
nullAs shown in Figure 1，A kind of infusion warning device，Including with the resonance coil (1) of wire coiling，Tube for transfusion (2) is wound around in the spacing of resonance coil (1) wire，Also include exciting circuit、Signal conditioning circuit、Governor circuit and warning circuit，Resonance coil (1) series resistor connects exciting circuit，Resistance two end signal is accessed signal conditioning circuit，Signal conditioning circuit output is accessed governor circuit，Governor circuit connects warning circuit，Also include housing (3)，Housing (3) is hollow circular tube，Housing (3) outer surface arranges the linear guide groove (4) of uniform spiral distribution，In guide groove (4) spacing with guide groove be parallel direction coiling resonance coil (1)，Tube for transfusion (2) is wound in guide groove (4)，Housing (3) is internal arranges circuit board (5)，Circuit board arranges exciting circuit on (5)、Signal conditioning circuit、Governor circuit and warning circuit，Exciting circuit includes audion and agitator，Signal conditioning circuit includes operational amplifier and buffer，Governor circuit includes STM32 single-chip microcomputer，Warning circuit includes that buzzer and buzzer drive，Warning circuit includes light emitting diode，Also include power circuit，Power circuit includes rechargeable battery voltage stabilizing chip and filter capacitor，The material of housing is plastics，Housing wall thickness is 8mm，Resonance coil (1) is wide is 4.5mm with height，With guide groove distance 0.75mm，The groove depth of guide groove 3 and groove width are 4.5mm，Separation is 6mm.
Further, at tube for transfusion outer wall coiling 1000 circle enamel-covered wire as resonance coil, after concatenating 270 ohmages, exciting circuit is accessed.Use positive-negative-positive 8550 audion and 555 agitators to build exciting circuit, regulate 555 agitators and produce the driving control pulse of about 10us.Use operational amplifier and buffer to build signal conditioning circuit, resistance two end signal is accessed modulate circuit.Use STM32f446RE single-chip microcomputer and minimum system thereof to build governor circuit, modulate circuit output is accessed governor circuit.Use buzzer and buzzer to drive and build warning circuit, and the input of warning circuit is connected on the output I/O port of governor circuit.Functional block diagram and the schematic diagram of circuit are shown in Fig. 3, Fig. 4.
Control flow chart as shown in Figure 2, implementing circuit is built complete, powers up operation.When there being liquid in tube for transfusion, inductance and the parasitic capacitance of resonance coil are bigger, the natural frequency of resonance coil is relatively low, master control analysis is transferred to after signal conditioning circuit processes, master control collects the output signal of signal conditioning circuit, can measure the cycle of this signal, thus calculate natural frequency, governor circuit judgement has liquid, continues detection.When infusion-completed, resonance coil output fixed frequency raises, master control analysis is transferred to after signal conditioning circuit processes, master control collects the output signal of signal conditioning circuit, can measure the cycle of this signal, thus calculate natural frequency, the natural frequency that now governor circuit measurement is arrived raises, judgement does not has liquid, controls warning circuit and reports to the police.
Claims (9)
1. an infusion warning device, it is characterized in that, including with the resonance coil (1) of wire coiling, tube for transfusion (2) is wound around in the spacing of resonance coil (1) wire, also include exciting circuit, signal conditioning circuit, governor circuit and warning circuit, resonance coil (1) series resistor connects exciting circuit, resistance two end signal is accessed signal conditioning circuit, signal conditioning circuit output is accessed governor circuit, and governor circuit connects warning circuit.
A kind of infusion warning device the most according to claim 1, it is characterized in that, also include housing (3), housing (3) is hollow circular tube, housing (3) outer surface arranges the linear guide groove (4) of uniform spiral distribution, in guide groove (4) spacing with guide groove be parallel direction coiling resonance coil (1), tube for transfusion (2) is wound in guide groove (4), housing (3) is internal arranges circuit board (5), and circuit board arranges exciting circuit, signal conditioning circuit, governor circuit and warning circuit on (5).
A kind of infusion warning device the most according to claim 1, it is characterised in that exciting circuit includes audion and agitator.
A kind of infusion warning device the most according to claim 1, it is characterised in that signal conditioning circuit includes operational amplifier and buffer.
A kind of infusion warning device the most according to claim 1, it is characterised in that governor circuit includes STM32 single-chip microcomputer.
A kind of infusion warning device the most according to claim 1, it is characterised in that warning circuit includes that buzzer and buzzer drive.
A kind of infusion warning device the most according to claim 1, it is characterised in that warning circuit includes light emitting diode.
A kind of infusion warning device the most according to claim 1, it is characterised in that also including power circuit, power circuit includes rechargeable battery voltage stabilizing chip and filter capacitor.
A kind of infusion warning device the most according to claim 1, it is characterised in that the material of housing is plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073092.0U CN205515804U (en) | 2016-01-26 | 2016-01-26 | Transfusion reminding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073092.0U CN205515804U (en) | 2016-01-26 | 2016-01-26 | Transfusion reminding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205515804U true CN205515804U (en) | 2016-08-31 |
Family
ID=56770654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620073092.0U Expired - Fee Related CN205515804U (en) | 2016-01-26 | 2016-01-26 | Transfusion reminding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205515804U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477741A (en) * | 2016-01-26 | 2016-04-13 | 南京信息工程大学 | Transfusion reminding device and method |
-
2016
- 2016-01-26 CN CN201620073092.0U patent/CN205515804U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477741A (en) * | 2016-01-26 | 2016-04-13 | 南京信息工程大学 | Transfusion reminding device and method |
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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: 20160831 Termination date: 20180126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |