CN114674382A - Non-contact blood flow monitoring device - Google Patents
Non-contact blood flow monitoring device Download PDFInfo
- Publication number
- CN114674382A CN114674382A CN202210305869.1A CN202210305869A CN114674382A CN 114674382 A CN114674382 A CN 114674382A CN 202210305869 A CN202210305869 A CN 202210305869A CN 114674382 A CN114674382 A CN 114674382A
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- China
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- container
- monitoring device
- permanent magnet
- elastic body
- blood flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/582—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters without electrodes
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a non-contact blood flow monitoring device, which comprises a rectangular flow channel container, wherein a liquid inlet and a liquid outlet are respectively arranged at two ends of the flow channel container at the bottom of the flow channel container; the permanent magnet is arranged in the runner container, the permanent magnet is arranged on the elastic body, and the elastic body is arranged in the runner container through a pin shaft; a receiver is arranged outside the flow channel container and used for detecting the angular position of the permanent magnet in real time; the invention has simple structure, low cost and convenient use, realizes the function of non-contact flow online real-time detection, can realize online real-time flow monitoring, is particularly suitable for life support intelligent equipment, avoids medical accidents caused by the fact that flow cannot be quickly maintained due to sensor failure, and improves the safety of the equipment.
Description
Technical Field
The invention relates to a non-contact blood flow monitoring device which is used for monitoring flow and is particularly suitable for monitoring flow in contact with blood.
Background
With the continuous development of science and technology and the continuous improvement of the living demand of people, sensors based on various working principles, such as a pressure sensor, a temperature sensor, a flow sensor and the like, are developed in the market and are applied to various aspects of life and scientific research. Such as flow sensors that monitor the flow of gas or liquid. Most of the existing flow sensors are in complete contact with fluid, and the manufacturing cost and the maintenance cost are high. Particularly, for blood flow monitoring, the monitoring part directly contacts with blood, which may cause problems of blood coagulation, pollution and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a non-contact blood flow monitoring device, which realizes the monitoring of blood in a non-contact state.
In order to solve the technical problem, the non-contact blood flow monitoring device comprises a rectangular flow channel container, wherein a liquid inlet and a liquid outlet are respectively arranged at two ends of the flow channel container at the bottom of the flow channel container; the permanent magnet is arranged in the runner container, the permanent magnet is arranged on the elastic body, and the elastic body is arranged in the runner container through a pin shaft; a receiver is arranged outside the flow passage container and used for detecting the angular position of the permanent magnet in real time.
The permanent magnet and the elastic body are used as a sensor execution unit to be in contact with fluid (such as blood), the receiver is not in contact with the fluid, when flowing liquid flows through the execution unit, the elastic body is deformed (generates a certain angle) along the flowing direction of the fluid, and the receiver can detect the space position of the permanent magnet arranged at the tail end of the strain gauge in real time so as to calculate the flow rate. In the absence of fluid pressure, the elastomer returns to its original shape.
In particular, the receiver has two straddling feet by which it straddles the flow passage container. Furthermore, in order to improve the firmness of the installation of the receiver, raised lines are arranged on the outer surface of the flow channel container on two sides of the flow channel container; the inboard of striding the foot is provided with the mounting groove, the sand grip position corresponds with the mounting groove position, strides the foot and strides when on the runner container, and the sand grip is injectd in the mounting groove.
In particular, the receiver is a magnetic sensor for detecting and determining the angular position of the permanent magnet.
In order to prevent error detection or improve the monitoring accuracy of the permanent magnet, resistance strain gauges are attached to the front and back surfaces of the elastic body, and the resistance strain gauges transmit electric signals outwards through electric signal lines. When the elastic body is deformed by the fluid, the resistance of the resistance strain gauge changes, and the change is transmitted outwards through the electric signal line.
The invention has simple structure, low cost and convenient use, realizes the function of non-contact flow online real-time detection, can realize online real-time flow monitoring, is particularly suitable for life support intelligent equipment, avoids medical accidents caused by the fact that flow cannot be quickly maintained due to sensor failure, and improves the safety of the equipment.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a diagram of the components of the present invention.
FIG. 2 is a schematic diagram of the connection of the present invention.
Fig. 3 is a sectional view taken along line a-a in fig. 2.
Fig. 4 is a schematic diagram of a sensor actuator.
Fig. 5 is a use state diagram of the present invention.
FIG. 6 is a schematic view of a strain gage attached to an elastomer.
Detailed Description
As shown in fig. 1, the non-contact blood flow monitoring device includes a rectangular flow channel container 1, at the bottom of the flow channel container 1, a liquid inlet 2 and a liquid outlet 3 are respectively disposed at two ends of the flow channel container 1, as shown in fig. 2, the liquid inlet 2 and the liquid outlet 3 are both connected with a blood transfusion pipeline 9, and the blood transfusion pipeline 9 can be connected with an artificial heart system, such as a blood pump, to monitor the flow rate of the pumped blood.
As shown in fig. 3, a sheet-shaped permanent magnet 9 is arranged inside the flow channel container 1, the permanent magnet 9 is mounted on an elastic body 7, and the elastic body 7 is mounted in the flow channel container 1 through a pin 8. The permanent magnet 9 and the elastic body 7 (as shown in fig. 4) are used as sensor execution units to contact with fluid (such as blood), and as shown in fig. 5, when flowing blood 10 (flowing direction is arrow direction in fig. 5) flows through the execution units, the elastic body 7 is deformed (generates a certain angle) along the flowing direction of the blood 10, and the permanent magnet 9 is driven to generate position change. After no blood flowing pressure exists, the elastic body 7 is restored to the original state, and the permanent magnet 9 is driven to be restored to the original state. The elastic body 7 is made of thin metal sheet, and can be bent and deformed when being subjected to fluid pressure due to the thinness of the elastic body; in the absence of fluid pressure, its memory characteristics can be restored to their original state.
As shown in fig. 3, a receiver 5 is arranged outside the flow channel container 1, specifically, the receiver 5 is a magnetic sensor, the receiver 5 has two straddling feet 6, and the receiver 5 straddles the flow channel container 1 via the two straddling feet 6. Raised lines 4 are arranged on the outer surface of the flow channel container 1 on two sides of the flow channel container 1. The inside of striding foot 6 is provided with the mounting groove (not marked), the sand grip 4 position corresponds with the mounting groove position, strides foot 6 and strides when striding on runner container 1, and sand grip 4 is injectd in the mounting groove. In this way, the receiver 5 is not in contact with the fluid, and the receiver 5 can detect the spatial position of the permanent magnet 9 arranged at the end of the elastic body 7 in real time, i.e. the receiver 9 detects the angular position of the permanent magnet 9 in real time, thereby calculating the flow rate.
As shown in fig. 6, two resistance strain gauges 11 are attached to both front and back surfaces of the elastic body 7, and the resistance strain gauges 11 transmit electric signals to the outside through electric signal lines. When the elastic body 7 is deformed by the fluid, the resistance of the resistance strain gauge 11 changes, and the change (resistance value) is transmitted to the outside through the electric signal line (the change in resistance causes a change in current). Thus, on the one hand, it can be determined whether the monitoring by the permanent magnet 9 is misdetected, for example, when the permanent magnet 9 generates magnetic change and the resistance of the resistance strain gauge 11 does not change, the misdetection may be generated. On the other hand, the flow rate can be monitored by respectively corresponding to a certain flow rate according to the resistance change of the resistance strain gauge 11. The resistance change is obtained after the resistance change causes the current change of the electric signal line and measurement, and thus, the flow data can be obtained after the resistance change data is obtained. The data monitored by the permanent magnet 9 and the resistance strain gauge 11 can be compared, and the monitoring accuracy is further improved.
The above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (6)
1. The non-contact blood flow monitoring device is characterized by comprising a cuboid-shaped flow channel container, wherein a liquid inlet and a liquid outlet are respectively arranged at two ends of the flow channel container at the bottom of the flow channel container; the permanent magnet is arranged in the runner container, the permanent magnet is arranged on the elastic body, and the elastic body is arranged in the runner container through a pin shaft; a receiver is arranged outside the flow passage container and used for detecting the angular position of the permanent magnet in real time.
2. The non-contact blood flow monitoring device of claim 1, wherein: the receiver has two straddling feet by which it straddles the flow passage container.
3. The non-contact blood flow monitoring device of claim 2, wherein: raised lines are arranged on the outer surface of the runner container on both sides of the runner container; the inboard of striding the foot is provided with the mounting groove, the sand grip position corresponds with the mounting groove position, strides the foot and strides when on the runner container, and the sand grip is injectd in the mounting groove.
4. The non-contact blood flow monitoring device according to any one of claims 1-3, wherein: the receiver is a magnetic sensor.
5. The non-contact blood flow monitoring device of claim 1, wherein: resistance strain gauges are attached to the front side and the back side of the elastic body, and the resistance strain gauges transmit electric signals of the resistance strain gauges outwards through electric signal lines.
6. The non-contact blood flow monitoring device of claim 5, wherein: two resistance strain gauges are attached to each surface of the elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210305869.1A CN114674382A (en) | 2022-03-25 | 2022-03-25 | Non-contact blood flow monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210305869.1A CN114674382A (en) | 2022-03-25 | 2022-03-25 | Non-contact blood flow monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114674382A true CN114674382A (en) | 2022-06-28 |
Family
ID=82076642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210305869.1A Pending CN114674382A (en) | 2022-03-25 | 2022-03-25 | Non-contact blood flow monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114674382A (en) |
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2022
- 2022-03-25 CN CN202210305869.1A patent/CN114674382A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230515 Address after: Room 2001, 20th Floor, Building A, Mingjia Science and Technology Building, No. 99 Shengli Road, Jiangning District, Nanjing City, Jiangsu Province, 210000 (Jiangning Development Zone) Applicant after: Nanjing Hanke Mingde Medical Technology Co.,Ltd. Address before: 318000 Baita Industrial Cluster, Baita Town, Xianju County, Taizhou City, Zhejiang Province Applicant before: Zhejiang shouwo Medical Technology Co.,Ltd. |
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| TA01 | Transfer of patent application right |