CN1003393B - Temp. sensor of high resistance conductor for microwave heating - Google Patents
Temp. sensor of high resistance conductor for microwave heating Download PDFInfo
- Publication number
- CN1003393B CN1003393B CN86100933.9A CN86100933A CN1003393B CN 1003393 B CN1003393 B CN 1003393B CN 86100933 A CN86100933 A CN 86100933A CN 1003393 B CN1003393 B CN 1003393B
- Authority
- CN
- China
- Prior art keywords
- resistive conductor
- carbon
- solvent
- component
- high resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Abstract
The present invention relates to a high resistance conductor temperature transducer which is composed of a semiconductor thermal sensitive resistor, a high resistance conducting wire which takes an optical fiber as a matrix, and nonmetal electric conducting glue containing carbon. The component of the electric conducting glue containing carbon is A: B=1: 1, wherein the A is epoxy resin, carbon powder and a solvent, and the B is phenolic resin, carbon powder and a solvent. The transducer can be used in the clinical application of curing tumor by microwave heating.
Description
The present invention relates to a kind of temperature survey sensor.
Microwave hyperthermia treatment tumour is proved a kind of effective methods of treatment by medical circle.Microwave hyperthermia treatment tumour need be measured by time and two indexs of temperature.Wherein temperature index has very big influence to curative effect.Because microwave is a kind of electromagnetic wave, therefore, contains the conventional temperature sensor cisco unity malfunction of metal ingredient.In addition, the existence of metal ingredient also may cause the distortion that adds thermal electromagnetic fields in the sensor, and this has not only reduced curative effect, also can cause the localized burn of the tissue of being heated when serious.
A kind of temperature sensor that is made of the semiconductor thermistor and the resistive conductor of containing metal composition is not disclosed on No. 76071, the European patent.It has following structure and technology: the conductive material made from a kind of fluoride resin of carbon dope is as transmission line.The carbon fluoride resin thread of this conduction has a fuse as reinforcement, and fuse is made of the ptfe sheet of thick 0.2mm, wide 0.4mm, with hot-pressing technique this resistive conductor with three-layer structure is made of one.The temperature-sensing element of sensor is a semiconductor thermistor, it with adopt that to mix silver conductive adhesive bonding being connected of transmission line.
IEEE microwave theory and technology transactions (V
0L, MTT-24, PP43-45.Jan 1976) a kind of resistive conductor temperature sensor of introducing is made of thick-film thermistor and vacuum carburization resistive conductor.The matrix of this resistive conductor is a kind of plastic lead wire.Make its surface produce minute aperture through particular processing, utilize vacuum carburizing technology carburizing on it then.Its thick-film thermistor of this temperature sensor with also adopt that to mix silver epoxy bonding being connected of carburizing high resistant plastic lead wire.From the structure of above-mentioned at present known resistive conductor temperature sensor as can be seen: its manufacture craft of resistive conductor as signal transmssion line is very complicated, and it is affected the stability of resistive conductor and reliability.In addition, temperature-sensing element and resistive conductor to be connected what adopt be that to mix silver conductive adhesive bonding.In fact this existence that contains silver conductive adhesive has increased the metal ingredient of temperature-sensitive part.
The purpose of this invention is to provide a kind of new resistive conductor temperature sensor, it has very high stability and reliability, and manufacture craft is simple.Basically eliminated the interaction between sensor and the microwave field and influenced each other from practical effect.
The present invention finishes as follows.Resistive conductor is to be that the polyflon that matrix is coated with carbon containing forms through thermal treatment with the optical fiber.The bonding of resistive conductor and thermistor is to adopt nonmetallic carbon containing conductive adhesive.
Below in conjunction with accompanying drawing the present invention is described in detail.Accompanying drawing is the structural drawing of this temperature sensor.(1) is that semiconductor thermistor, (2) are that platinum filament, (3) are that carbon containing conducting resinl, (4) are that resistive conductor, (5) are external shielding lines among the figure.
The base material of resistive conductor (4) is the optical fiber of 0.08mm diameter.The high resistant carbon film is formed through certain Technology for Heating Processing by the polyflon of carbon containing.In polyflon, mix carbon black, grind with bowl mill and form high resistant carbon slurry, on optical fiber, be coated with carbon with shotcrete machine then.Optical fiber will dry by the fire 10 minutes down with the ethanol scouring and at 80～100 ℃ in advance, the lead that will be coated with carbon film is put into baking oven then, heated 20 minutes, 30 minutes and 8 hours down at 120 ℃, 160 ℃ and 180 ℃ respectively, after heat treatment, the stability of this resistive conductor has improved greatly.When resistive conductor 100mm was long, its resistance value was about 1M Ω.Can select four higher resistive conductors of consistance as the transmission line (5) that is connected with the external circuit unit.
The metal wire that connects semiconductor thermistor (1) will as far as possible carefully be lacked, to reduce self-heating and electromagnetic reflection.The responsive pearl diameter of thermistor is about 0.1mm, and platinum filament (2) diameter that is connected with responsive pearl is about 0.01mm, the about 4mm of length.Thermistor is a negative temperature coefficient unit, and in the time of 25 ℃, its resistance is 500K Ω～1M Ω.
Thermistor (1) is bonding with being connected with carbon containing conducting resinl (3) of resistive conductor (4).This conducting resinl is made into by two kinds of components of A, B.The ratio of two kinds of components is A: B=1: 1, and the A component is by epoxy resin, carbon dust and solvent composition.The B component is by phenolics, carbon dust and solvent composition.Carbon black powders shared ratio in conducting resinl can add according to specific requirement.Be that its resistance per unit length rate of the conducting resinl that is made into is n+k/cm under the situation of twice (volume ratio) of other composition generally at carbon dust.In order to improve its stability characteristic (quality), and make it bonding firmly to the temperature probe that glued, need through the thermal treatment of heating under 150 ℃.
Detect the performance of this sensor, can in a chamber type phantom consistent, carry out with tissue character.Adopt 915MHZ, 2450MHZ microwave diathermy machine, its output power range is 35 ℃ to 55 ℃ from 5W to 40W, phantom heating-up temperature scope.The experimental result explanation, when microwave diathermy machine is closed, when removing electromagnetic radiation, the temperature value that temperature sensor is measured does not have visible saltus step, and the temperature resolution of sensor is better than 0.1 ℃.
Temperature sensor of the present invention can be used in the clinical practice of microwave heating treatment tumour, but also the occasion that can be used in microwave radiation detects the temperature of heated material.
Claims (2)
1, a kind of resistive conductor temperature sensor is made of semiconductor thermistor, resistive conductor and conducting resinl.It is characterized in that resistive conductor (4) is made up of fibre-optic substrate and high resistant carbon film, this high resistant carbon film is to be formed through certain Technology for Heating Processing by the polyflon of carbon containing in fibre-optic substrate.Semiconductor thermistor (1) adopts carbon containing conducting resinl (3) bonding with being connected of resistive conductor (4).
2, the described resistive conductor temperature sensor of claim 1 is characterized in that semiconductor thermistor is connected usefulness with resistive conductor carbon containing conducting resinl is made into by two kinds of components of A, B.Ratio is A: B=1: 1.The A component is by epoxy resin, carbon black powders and solvent composition.The B component is by phenolics, carbon black powders and solvent composition.The ratio of epoxy resin, carbon dust and solvent is about 1: 2: 1 in the A component, and the ratio of phenolics, carbon dust and solvent is about 1: 2: 1 in the B component.(above-mentioned proportion relation is volume ratio).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100933.9A CN1003393B (en) | 1986-01-31 | 1986-01-31 | Temp. sensor of high resistance conductor for microwave heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86100933.9A CN1003393B (en) | 1986-01-31 | 1986-01-31 | Temp. sensor of high resistance conductor for microwave heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86100933A CN86100933A (en) | 1987-04-29 |
| CN1003393B true CN1003393B (en) | 1989-02-22 |
Family
ID=4801252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86100933.9A Expired CN1003393B (en) | 1986-01-31 | 1986-01-31 | Temp. sensor of high resistance conductor for microwave heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003393B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149295B (en) * | 2007-10-26 | 2010-05-19 | 天津工业大学 | Thermistor high resistance lead temperature sensor production method and interference-free temperature sensor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288313B (en) * | 2011-08-15 | 2013-01-16 | 西北核技术研究所 | Method for bonding thermocouple with graphite piece |
-
1986
- 1986-01-31 CN CN86100933.9A patent/CN1003393B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149295B (en) * | 2007-10-26 | 2010-05-19 | 天津工业大学 | Thermistor high resistance lead temperature sensor production method and interference-free temperature sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86100933A (en) | 1987-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2952762A (en) | Black body radiation source | |
| US3641439A (en) | Near-field radiation monitor | |
| ES8502307A1 (en) | Autoregulating electrically shielded heater. | |
| CN1003393B (en) | Temp. sensor of high resistance conductor for microwave heating | |
| EP0076071B1 (en) | Temperature sensing device | |
| GB1520502A (en) | Thermistors having a positive temperature co-efficient of resistance | |
| CN101149295B (en) | Thermistor high resistance lead temperature sensor production method and interference-free temperature sensor | |
| US4518912A (en) | Radiation detector | |
| Larsen et al. | A microwave decoupled brain-temperature transducer | |
| JPH0473086B2 (en) | ||
| JPH06249716A (en) | Thermister temperature sensor | |
| US4344062A (en) | Humidity sensor element | |
| US3296866A (en) | Electric thermometer | |
| CN2129925Y (en) | Temperature probe for high resistance wire | |
| JPS60247127A (en) | Temperature sensor | |
| CN108508264A (en) | Power sensor | |
| DE3567593D1 (en) | Electrical heating element | |
| CA1128773A (en) | Multi purpose soil probe | |
| GB1393527A (en) | Radiometer | |
| Matsui et al. | The development of a high impedance all ceramic thermistor resistant to microwave irradiation: its possible medical application | |
| CN108508265A (en) | Power sensor | |
| Brecher | The electrical conductivity of carbonaceous meteorites. | |
| CN1062038A (en) | Multi-point non-interference temp measure probe with non-metal lead wire | |
| SU847527A1 (en) | Flexible electric heater | |
| JPS59125029A (en) | Temperature sensor for electromagnetic wave heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |