CN215178265U - Simulated body temperature generator - Google Patents
Simulated body temperature generator Download PDFInfo
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- CN215178265U CN215178265U CN202121461652.7U CN202121461652U CN215178265U CN 215178265 U CN215178265 U CN 215178265U CN 202121461652 U CN202121461652 U CN 202121461652U CN 215178265 U CN215178265 U CN 215178265U
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Abstract
The application provides a simulation body temperature generator, it includes: the device comprises a barrel container, a first water pump, a second water pump and a constant-temperature water tank; the barrel container is made of ABS plastic; the cylindrical container is filled with water medium; the port of the barrel container is sealed by heat insulation materials; the constant-temperature water tank is arranged outside the barrel container, and a first pipeline and a second pipeline are formed between the constant-temperature water tank and the barrel container; the first pipeline and the second pipeline are respectively composed of heat insulation hoses; the first water pump is arranged in the first pipeline, and the second water pump is arranged in the second pipeline; the first pipeline is used for providing the water medium from the constant-temperature water tank to the barrel container, and the second pipeline is used for providing the water medium from the barrel container to the constant-temperature water tank; a temperature measuring unit is arranged in the barrel container.
Description
Technical Field
The application relates to the field of human parameter monitoring, in particular to a simulated body temperature generator.
Background
The human body temperature is one of four vital signs of the human body, and is different from one body part to another body part. Core body temperature refers to the temperature of the internal organs of the human body, which is defined as the temperature of the thoracic, abdominal and central nerves inside the human body. Core body temperatures are slightly different due to different levels of visceral organ metabolism. Under a quiet state, the liver temperature is highest and is about 38 ℃; the temperature of the kidney, pancreas and duodenum is slightly low; the rectal temperature is lower. During exercise, skeletal muscles generate much heat and the temperature is high. Although the temperature of each part is different, the temperature is generally stabilized within the range of 36.5-37.5 ℃ due to the effects of blood circulation and tissue heat conduction. Compared with the body surface temperature, the core body temperature is not easily influenced by external environment temperature fluctuation, sweat evaporation and personal clothing, so that the health condition of the human body can be more accurately reflected.
However, the core body temperature also varies from individual to individual depending on sex, age and constitution. In addition, the body temperature has certain rhythmicity, and more meaningful longitudinal trend information is often difficult to obtain according to single measurement data. Therefore, the core body temperature can be acquired continuously and individually for a long time, rich information can be provided for monitoring the life activity state of the human body, and the method has important significance for clinical diagnosis and treatment and biomedical research.
Intensive study of core body temperature requires devices that mimic core body temperature. CN 101843476B proposes a calibration device for a non-invasive nuclear temperature measuring device, which utilizes a container filled with a liquid medium to simulate human tissues, and an electric heater is arranged in the container to regulate and control the core body temperature change. In the device, the temperature control system of the heater combined with the submersible pump has large fluctuation and cannot truly reflect the steady core body temperature of a human body, so that large errors can be introduced for subsequent detection and research of the core body temperature. In addition, because water pump, heating circuit etc. all set up in the container, need reserve the access & exit of more cable on the container, cause the heat to run off easily, and inconvenient equipment maintenance. Furthermore, the device is difficult to simulate a variety of skin fold thicknesses, thereby ignoring the true appearance of the human epidermis.
Disclosure of Invention
In view of the above problems, the present application is directed to a simulated body temperature generator capable of truly simulating a core body temperature of a human body and providing a stable core body temperature.
The application provides a simulation body temperature generator, it includes: the device comprises a barrel container, a first water pump, a second water pump and a constant-temperature water tank;
the barrel container is made of ABS plastic; the cylindrical container is filled with water medium; the port of the barrel container is sealed by heat insulation materials;
the constant-temperature water tank is arranged outside the barrel container, and a first pipeline and a second pipeline are formed between the constant-temperature water tank and the barrel container; the first pipeline and the second pipeline are respectively composed of heat insulation hoses; the first water pump is arranged in the first pipeline, and the second water pump is arranged in the second pipeline; the first pipeline is used for providing the water medium from the constant-temperature water tank to the barrel container, and the second pipeline is used for providing the water medium from the barrel container to the constant-temperature water tank;
a temperature measuring unit is arranged in the barrel container.
Preferably, the inner wall or the outer wall of the barrel container is provided with a radiation-proof layer.
Preferably, the temperature measuring unit is a thermistor.
Preferably, the first water pump and the second water pump are installed in the heat insulation box body.
Preferably, the drum container comprises a plurality of temperature locations, each temperature location corresponding to a different wall thickness.
Preferably, the wall thickness of one of the plurality of temperature measurement positions is 11 mm.
Preferably, the barrel container has a height of 250mm, an internal diameter of 80mm and a base thickness of 25 mm.
The application of the simulated body temperature generator adopts the constant-temperature water tank, so that the simulated core body temperature is more stable, and the core body temperature can be estimated more practically and accurately from the body surface temperature in the experiment. The temperature measuring positions with different wall thicknesses are arranged on the container to simulate the change of the thermal resistance of the skin, so that the change condition of monitoring the core temperature at different positions can be simulated more accurately.
Drawings
Fig. 1 is a schematic structural diagram of a simulated body temperature generator according to the present application.
Detailed Description
The simulated body temperature generator according to the present application will be described in detail below with reference to the accompanying drawings.
The application provides a simulation body temperature generator, it includes: a barrel container 11, a first water pump 12a, a second water pump 12b and a constant temperature water tank 13.
The barrel container 11 is made of ABS plastic; the cylindrical container 11 is filled with water medium; the port of the drum container 11 is closed by a heat insulating material.
The constant-temperature water tank 13 is arranged outside the barrel container 11, and a first pipeline and a second pipeline are formed between the constant-temperature water tank 13 and the barrel container 11; the first pipeline and the second pipeline are respectively composed of heat insulation hoses 14; a first water pump 12a is installed in the first pipeline, and a second water pump 12b is installed in the second pipeline; the first pipeline is used for supplying the water medium from the constant-temperature water tank 13 to the barrel container 11, and the second pipeline is used for supplying the water medium from the barrel container to the constant-temperature water tank, so that water is circulated between the constant-temperature water tank and the barrel container.
A temperature measuring unit 15 is arranged in the cylindrical container 11. The temperature measuring unit 15 is a thermistor to measure the temperature of the aqueous medium in the drum container 11, which is the simulated core body temperature.
The inner wall or the outer wall of the barrel container 11 is provided with a radiation-proof layer to prevent heat loss caused by heat radiation, so that the simulated core body temperature is stable.
The first and second water pumps 12a and 12b are installed in the heat insulation box, thereby avoiding heat loss caused by the water pumps themselves as much as possible.
The drum container 11 comprises a plurality of temperature measuring locations 11a, 11b, each temperature measuring location corresponding to a different wall thickness. And the wall thickness corresponding to one temperature measuring position is 11 mm.
The barrel container 11 has a height of 250mm, an inner diameter of 80mm and a bottom thickness of 25 mm.
The constant-temperature water tank is used for controlling to generate constant heat, water in the constant-temperature water tank is conveyed into the barrel container through the first water pump, the water in the barrel container is conveyed into the constant-temperature water tank through the second water pump, heat balance is formed between the barrel container and the constant-temperature water tank, and therefore a uniform and stable body core heat source is generated in the body temperature generator. The wall of the barrel container is used for simulating the thermal resistance of skin (fat, muscle, epidermis and the like) with a certain thickness of a human body. The temperature measurement positions corresponding to different wall thicknesses represent the thermal resistance of the skin with different thicknesses.
The drum wall thickness is calculated as follows:
coefficient of thermal conductivity lambda of human skins0.47W/(m.k), coefficient of thermal conductivity of fat λfThe thickness of normal abdominal male skin fold (skin + subcutaneous fat) is 5-15 mm, and female skin fold is 12-20mm (0.21W/(m.k)). We take the average skin thickness δ to 10mm, where the skin thickness δs2mm, fat thickness deltafAnd (2) according to the heat conduction steady-state stage, the total thermal resistance is equal to the sum of series thermal resistances, namely the formula (1):
calculating the average thermal conductivity of the wrinkles by substituting the data to obtain lambdaa0.236W/(m.k). The barrel wall of the body temperature simulation generator is made of ABS material with heat conductivity coefficient lambdaabs0.2512W/(m.k), the equivalent 10mm crimp thickness of ABS material thickness is based on the same principle of equal thermal resistance as described above
The thickness of the main body of the barrel wall of the body temperature simulation generator is 11 mm. The thickness of other thermometric locations may be 9mm, 10mm, 12mm, 13mm, etc.
In order to meet the experiment requirement, save materials and be convenient to carry, the overall size is determined to be 250mm of barrel height, 80mm of inner diameter and 25mm of ABS base thickness, and the thermal insulation material is added for bedding in the experiment so as to reduce the uneven barrel wall temperature caused by the loss of bottom heat. The top of the barrel container is a sealing ball valve with the thickness of 10mm, and a one-way heat insulation hose hole and an exhaust hole are reserved. The heat transfer medium in the barrel container is water, and the 12V 4W water pump is arranged in the heat insulation box body, so that the heat loss caused by the water pump is avoided. The water flow is stirred to make the temperature in the generator uniform. The temperature control precision of the constant temperature water tank is within the range of +/-0.05 ℃, and a constant temperature curve is drawn to test the temperature control capability.
Under the condition of stable core body temperature, different thermometric parts are easy to cause measurement errors due to the change of the thickness of skin folds. Therefore, different wall thicknesses are required on the body temperature generator to simulate changes in the body temperature site or differences in the thickness of the folds of the skin of a person. In addition, different wall thicknesses can also facilitate multi-point measurement of a plurality of temperature measuring devices, and parallel experiments can accelerate calibration of the thermometer.
Unless defined otherwise, all technical and/or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The materials, methods, and examples set forth in this application are illustrative only and not intended to be limiting.
Although the present invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the teachings of this application and yet remain within the scope of this application.
Claims (7)
1. A simulated body temperature generator, comprising: the device comprises a barrel container, a first water pump, a second water pump and a constant-temperature water tank;
the barrel container is made of ABS plastic; the cylindrical container is filled with water medium; the port of the barrel container is sealed by heat insulation materials;
the constant-temperature water tank is arranged outside the barrel container, and a first pipeline and a second pipeline are formed between the constant-temperature water tank and the barrel container; the first pipeline and the second pipeline are respectively composed of heat insulation hoses; the first water pump is arranged in the first pipeline, and the second water pump is arranged in the second pipeline; the first pipeline is used for providing the water medium from the constant-temperature water tank to the barrel container, and the second pipeline is used for providing the water medium from the barrel container to the constant-temperature water tank;
a temperature measuring unit is arranged in the barrel container.
2. The simulated body temperature generator of claim 1, wherein:
and the inner wall or the outer wall of the barrel container is provided with a radiation-proof layer.
3. The simulated body temperature generator of claim 1, wherein:
the temperature measuring unit is a thermistor.
4. The simulated body temperature generator of claim 1, wherein:
the first water pump and the second water pump are installed in the heat insulation box body.
5. The simulated body temperature generator of claim 1, wherein:
the barrel container comprises a plurality of temperature measuring positions, and each temperature measuring position corresponds to different wall thicknesses.
6. The simulated body temperature generator of claim 5, wherein:
and the wall thickness corresponding to one temperature measuring position in the plurality of temperature measuring positions is 11 mm.
7. The simulated body temperature generator of claim 1, wherein:
the height of the barrel container is 250mm, the inner diameter is 80mm, and the bottom thickness is 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461652.7U CN215178265U (en) | 2021-06-29 | 2021-06-29 | Simulated body temperature generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121461652.7U CN215178265U (en) | 2021-06-29 | 2021-06-29 | Simulated body temperature generator |
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| CN215178265U true CN215178265U (en) | 2021-12-14 |
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| CN202121461652.7U Active CN215178265U (en) | 2021-06-29 | 2021-06-29 | Simulated body temperature generator |
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2021
- 2021-06-29 CN CN202121461652.7U patent/CN215178265U/en active Active
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