CN203790372U - Infusion blocking pressure detection alarm device - Google Patents
Infusion blocking pressure detection alarm device Download PDFInfo
- Publication number
- CN203790372U CN203790372U CN201420057235.XU CN201420057235U CN203790372U CN 203790372 U CN203790372 U CN 203790372U CN 201420057235 U CN201420057235 U CN 201420057235U CN 203790372 U CN203790372 U CN 203790372U
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- circuit
- mcu
- motor
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- current sampling
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Abstract
The utility model discloses an infusion blocking pressure detection alarm device which comprises a motor driving circuit, a current sampling circuit, an MCU and a display alarm circuit. The motor driving circuit is connected with a port P0, a port P1 and a port P2 of the MCU, the MCU controls the rotation of a motor through the motor driving circuit, the current sampling circuit is connected with a port P3 of the MCU, the current of the motor is fed back to the port P3 of the MCU through a resistor R21 in the current sampling circuit, an A/D conversion circuit is integrated in the MCU, the A/D conversion circuit converts analog signals collected by the current sampling circuit into digital signals, and the alarm circuit is connected with the MCU. According to the infusion blocking pressure detection alarm device, the motor current sampling value amplitude can be matched with the input voltage of the MCU by adjusting the sampling resistor, the circuit is quite simple, real-time tracking response is rapid, the accuracy is high, and a sensor will not be fatigue due to the sampling resistor mode.
Description
Technical field
This utility model relates to technical field of medical instruments, particularly a kind of transfusion blockage pressure detecting alarm device.
Background technology
Infusion pump is a kind ofly can accurately control number of infusion drops or infusion flow rate, guarantees that medicine is can speed even, and dose accurately and safely enters a kind of instrument playing a role in patient body.Infusion pump is the control device of machinery or electronics normally, it reaches by acting on transfusion catheter the object of controlling transfusion speed, is usually used in the strict situation of controlling amount of infusion and dose of needs, as the medicine that boosts in application, antiarrhythmic drug, when infant vein or intravenous anesthesia.
Infusion pump in use, need to accurately control infusion pressure, can not make it surpass infusion pump rated pressure, tube for transfusion when the excessive reason of build-up of pressure may be transfusion blocks, therefore, occlusion detection circuit is the Key Circuit of infusion pump and syringe pump, and when blocking and reaching the force value of setting appears in infusion pipeline, the pump housing must stopping infusion the indication of reporting to the police.
Blockage pressure detecting circuit is infusion pump Key Circuit, and when blocking and reaching the force value of setting appears in infusion pipeline, the pump housing must stopping infusion the indication of reporting to the police.In the pump housing of a lot of producers now, obstruction sensor is working pressure sensor all, feature is that remolding sensitivity is higher, but owing to being contact type measurement, (general about 1 year) in use for some time, sensor there will be fatigue symptom, has influence on accuracy of detection, just can meet the requirements of accuracy of detection value after must again detecting demarcation.
In infusion pump miniature and that move with battery powered, generally adopt DC micromotor to reach the object that reduces volume and reduce power consumption.The feature of DC micromotor is that rotating speed is fast, and drive current is little, but when having external force to stop motor operation, its drive current has rising by a relatively large margin.
Utility model content
This utility model provides that a kind of circuit is simple, real-time tracking corresponding fast, degree of accuracy is high and tireless transfusion blockage pressure detecting alarm device.
For solving the problems of the technologies described above, this utility model transfusion blockage pressure detecting alarm device, comprising: motor-drive circuit, current sampling circuit, MCU and Display and Alarm Circuit; Wherein said motor-drive circuit is connected with P0, P1 and the P2 port of described MCU, is controlled the rotation of motor by described MCU by described motor-drive circuit; Current sampling circuit, described current sampling circuit is connected with the P3 port of described MCU, and the resistance R 21 of the electric current of described motor in the described current sampling circuit of sampling feeds back to the P3 port of described MCU; Integrated A/D change-over circuit also in described MCU, described A/D change-over circuit converts the analogue signal being collected by described current sampling circuit to digital signal; Described warning circuit is connected with described MCU.
Preferably, described MCU is also connected with a mechanical actuating mechanism.
This utility model transfusion blockage pressure detecting alarm device current of electric sampled value amplitude can be mated with adjusting the mode of sampling resistor and the input voltage of MCU, and circuit is very simple, and real-time tracking is corresponding fast, and degree of accuracy is higher; By sampling resistor mode, do not exist sensor to occur tired, in for a long time, can keep same precision.
Accompanying drawing explanation
Fig. 1 is this utility model transfusion blockage pressure detecting alarm device theory diagram;
Fig. 2 is this utility model transfusion blockage pressure detecting alarm device circuit diagram.
The specific embodiment
Below in conjunction with accompanying drawing, this utility model transfusion blockage pressure detecting alarm device is described in further detail.
As shown in Figure 1 and Figure 2, this utility model transfusion blockage pressure detecting alarm device, comprising: motor-drive circuit, current sampling circuit, MCU and Display and Alarm Circuit; Wherein motor-drive circuit is connected with motor rotation feedback signal input P0, motor drive signal outfan P1 and the motor stop signal outfan P2 of MCU, is controlled the rotation of motor by MCU by motor-drive circuit; Current sampling circuit, current sampling circuit is connected with the obstruction sampled value input port P3 of MCU, and the resistance R 21 of the electric current of motor in sample rate current sample circuit feeds back to the P3 port of MCU; Integrated A/D change-over circuit also in MCU, A/D change-over circuit converts the analogue signal being collected by current sampling circuit to digital signal; Warning circuit is connected with MCU, and MCU is also connected with a mechanical actuating mechanism.
MCUP1 port output motor drives signal, through U14 Combinational Logic Control, makes Q2 conducting Q3 cut-off, electrical power running, now the current value by motor feeds back to the P3 port of MCU through sampling resistor R21, by MCU, controls analog digital conversion, calculates current motor current value; In infusion pipeline, occur obstruction, motor current value can continue to increase, as calculated, when the pressure of infusion pipeline meets or exceeds the force value of control circuit setting, the P2 port output control signal of MCU makes Q3 conducting, Q2 cut-off, and motor dead electricity is out of service, mechanical actuating mechanism stopping infusion, is carried out sound and light alarm and warning reason is presented on display screen by alarm indicator circuit simultaneously.
This utility model transfusion blockage pressure detecting alarm device current of electric sampled value amplitude can be mated with adjusting the mode of sampling resistor and the input voltage of MCU, and circuit is very simple, and real-time tracking is corresponding fast, and degree of accuracy is higher; By sampling resistor mode, do not exist sensor to occur tired, in for a long time, can keep same precision.
Below the preferred embodiment of this utility model having been created illustrates, but this utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all modification being equal to or replacement under the prerequisite without prejudice to this utility model creative spirit, and the modification that these are equal to or replacement are all included in the application's claim limited range.
Claims (2)
1. transfusion blockage pressure detecting alarm device, is characterized in that, comprising:
Motor-drive circuit, current sampling circuit, MCU and Display and Alarm Circuit; Wherein
Described motor-drive circuit is connected with P0, P1 and the P2 port of described MCU, is controlled the rotation of motor by described MCU by described motor-drive circuit;
Current sampling circuit, described current sampling circuit is connected with the P3 port of described MCU, and the resistance R 21 of the electric current of described motor in the described current sampling circuit of sampling feeds back to the P3 port of described MCU;
Integrated A/D change-over circuit also in described MCU, described A/D change-over circuit converts the analogue signal being collected by described current sampling circuit to digital signal;
Described warning circuit is connected with described MCU.
2. transfusion blockage pressure detecting alarm device according to claim 1, is characterized in that, described MCU is also connected with a mechanical actuating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057235.XU CN203790372U (en) | 2014-01-29 | 2014-01-29 | Infusion blocking pressure detection alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057235.XU CN203790372U (en) | 2014-01-29 | 2014-01-29 | Infusion blocking pressure detection alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203790372U true CN203790372U (en) | 2014-08-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420057235.XU Expired - Fee Related CN203790372U (en) | 2014-01-29 | 2014-01-29 | Infusion blocking pressure detection alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203790372U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521532A (en) * | 2016-01-26 | 2016-04-27 | 北京英诺达医疗科技有限公司 | Blockage detection device and method of injection pump |
| CN107091948A (en) * | 2017-06-29 | 2017-08-25 | 桐乡昊屹电子有限公司 | The blockage detector and detection method of electronic infusion pump |
-
2014
- 2014-01-29 CN CN201420057235.XU patent/CN203790372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521532A (en) * | 2016-01-26 | 2016-04-27 | 北京英诺达医疗科技有限公司 | Blockage detection device and method of injection pump |
| CN107091948A (en) * | 2017-06-29 | 2017-08-25 | 桐乡昊屹电子有限公司 | The blockage detector and detection method of electronic infusion pump |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20170129 |