CN103713669B - The device and method of the accurate control CT detector temperature that closed loop is implemented - Google Patents
The device and method of the accurate control CT detector temperature that closed loop is implemented Download PDFInfo
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- CN103713669B CN103713669B CN201310741388.6A CN201310741388A CN103713669B CN 103713669 B CN103713669 B CN 103713669B CN 201310741388 A CN201310741388 A CN 201310741388A CN 103713669 B CN103713669 B CN 103713669B
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Abstract
The present invention relates to the device and method of the accurate control CT detector temperature that closed loop is implemented.Its device comprises closed cavity, CT detector, temperature sensor, controller, heating arrangement and thermal source thereof, wherein: closed cavity is as temperature regulator; CT detector, temperature sensor are placed in closed cavity; Heating arrangement heats closed cavity; Controller, according to the testing result of temperature sensor, by regulating heating arrangement, carries out closed-loop control to the heat that adds of closed cavity, thus the temperature constant of control CT detector.It is convenient to implement, and accurately can control detector temperature.The present invention is mainly used on the detecting device of computed tomograph scanner system (CT).
Description
Technical field
The present invention relates to the device and method of the accurate control CT detector temperature that a kind of closed loop is implemented.
Background technology
The X-ray detector that uses computed tomograph scanner system (CT) records X-ray quantitatively through the attenuation after human body.The properties of materials used due to detecting device is very responsive for temperature, if temperature variation is excessive in using, will cause the reduction of picture quality, thus impact diagnosis.
In order to reduce the impact of temperature, usually there are two kinds of methods: a kind of is the temperature controlling detecting device accurately, make its temperature fluctuation in use in specific scope; Another kind is the actual temperature that serviceability temperature sensor measurement goes out each detector cell, and corrects according to the temperature characteristics of detecting device.Two kinds of methods cut both ways, and have application in actual use.
Summary of the invention
In view of above-mentioned, the present invention is by the device and method of the accurate control CT detector temperature that provides a kind of closed loop to implement, and it is convenient to implement, and accurately can control detector temperature.
The device that the present invention adopts comprises: closed cavity, CT detector, temperature sensor, controller, heating arrangement and thermal source thereof, wherein:
Described closed cavity is as temperature regulator; Described CT detector, temperature sensor are placed in closed cavity; Described heating arrangement heats closed cavity; Described controller, according to the testing result of temperature sensor, by regulating heating arrangement, carries out closed-loop control to the heat that adds of closed cavity, thus the temperature constant of control CT detector.
Further: described closed cavity is made up of the carbon fiber board of the metal shell and this opening of covering with opening.
Further: described heating arrangement is the heating tape being arranged on closed cavity side.
Further: described CT detector is suspended within closed cavity, and is connected with metal shell with the material that thermal resistance is large.
Further: described temperature sensor adopts the material of large thermal resistance to be fixed within metal shell.
The method that the present invention adopts comprises step:
1) metal material is used to form the closed cavity with cavity, as temperature regulator;
2) CT detector and temperature sensor are placed in closed cavity;
3) to closed cavity heating, heat is made by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, heat is added to closed cavity and carries out closed-loop control, thus the temperature constant of control CT detector.
In described step 3) in, heating tape is connected at the outside surface of the metal material forming closed cavity, by heating to the mode of this heating tape heating to closed cavity, and regulate by the power of this heating tape of regulating and controlling the heat passing to closed cavity.
The present invention, by controlling the closed loop thermal of detector cell, arrives the constant of temperature, and then ensures the stable and linear of X-ray check data, thus obtains desirable image.
The present invention has the following advantages:
1. can the temperature of detecting device accurately be controlled in the scope required;
2. structure and control simple possible;
3. with low cost, be convenient to promote.
Accompanying drawing explanation
Fig. 1 is detector temperature control structure figure.
Embodiment
The present invention proposes a kind of be convenient to implement, accurately can control the closed-loop control system of detector temperature.
The device that the present invention adopts comprises: closed cavity, CT detector, temperature sensor, controller, heating arrangement and thermal source thereof, wherein:
Closed cavity is as temperature regulator; CT detector, temperature sensor are placed in closed cavity; Heating arrangement heats closed cavity; Controller, according to the testing result of temperature sensor, by regulating heating arrangement, carries out closed-loop control to the heat that adds of closed cavity, thus the temperature constant of control CT detector.
Further: closed cavity is made up of the carbon fiber board of the metal shell and this opening of covering with opening.
Heating arrangement is the heating tape being arranged on closed cavity side.
CT detector is suspended within closed cavity, and is connected with metal shell with the material that thermal resistance is large.
Temperature sensor adopts the material of large thermal resistance to be fixed within metal shell.
The method that the present invention adopts comprises step:
1) metal material is used to form the closed cavity with cavity, as temperature regulator;
2) CT detector and temperature sensor are placed in closed cavity;
3) to closed cavity heating, heat is made by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, heat is added to closed cavity and carries out closed-loop control, thus the temperature constant of control CT detector.
In described step 3) in, connecting heating tape at the outside surface of the metal material forming closed cavity, by heating closed cavity to the mode of this heating tape heating, regulating by the power of this heating tape of regulating and controlling the heat passing to closed cavity.
Innovative point of the present invention is mainly reflected in overall structure and Survey control mode.
Describe in detail below in conjunction with accompanying drawing.
Figure 1 shows that structural design of the present invention.The metal shell be made up of some metal supports 4 and carbon fiber board 2 define the closed cavity 3 that has large thermal capacitance, and are isolated in outside closed cavity 3 by other not controlled thermal source, thus ensure that temperature in closed cavity 3 is not by ectocine.In the heating tape 5 of metal shell side for controlling the temperature in closed cavity 3, the temperature in the closed cavity 3 that just can adjust under different environment temperatures by the power consumption controlling heating tape 5.7 is uncontrollable thermal source, needs its heat to be isolated in outside cavity.
Owing to designing the cavity of the large thermal capacitance of upper use, make the adjustment of the power consumption of heating tape 5 that cavity can not be made to have large temperature fluctuation.CT detector 6 is suspended within closed cavity 3, and the material large by thermal resistance is connected with metal shell, so just, can ensure that temperature directly can not be delivered to CT detector 6 through the path of low thermal resistance fast, thus reduce further the temperature fluctuation that the change due to the temperature of metal shell causes.Temperature sensor 1 adopts the material of large thermal resistance to be fixed within closed cavity 3 equally, because it have employed same heat receive mode with controlled CT detector 6, and be arranged within identical constant temperature cavity, so it can reflect the temperature of CT detector 6 truely and accurately.Dynamically can be adjusted the power consumption of heating tape 5 thus by the result of temperature detection, thus reach the accurate closed-loop control to CT detector temperature.
Realize closed-loop control to need to adopt controller, controller adopts an arm processor, for the temperature information of control ADC chip collecting temperature sensor, the output power of heating tape is regulated according to the difference regulating and controlling heating tape conducting dutycycle of actual temperature and target temperature, make the input heat of closed cavity and the amount balance of heat radiation, reach temperature stabilization.
Claims (6)
1. a device for the accurate control CT detector temperature of closed loop enforcement, is characterized in that:
This device comprises closed cavity, CT detector, temperature sensor, controller, heating arrangement and thermal source thereof, wherein:
Described closed cavity is as temperature regulator;
Described CT detector is suspended within closed cavity, and is connected with the metal shell of closed cavity with the material that thermal resistance is large;
Described temperature sensor adopts the material of large thermal resistance to be fixed within the metal shell of closed cavity;
Described heating arrangement heats closed cavity;
Described controller, according to the testing result of temperature sensor, by regulating heating arrangement, carries out closed-loop control to the heat that adds of closed cavity, thus the temperature constant of control CT detector.
2. the device of the accurate control CT detector temperature of closed loop enforcement as claimed in claim 1, is characterized in that:
Described closed cavity is made up of the carbon fiber board of the metal shell and this opening of covering with opening.
3. the device of the accurate control CT detector temperature of closed loop enforcement as claimed in claim 1, is characterized in that:
Described heating arrangement is the heating tape being arranged on closed cavity side.
4. a method for the accurate control CT detector temperature of closed loop enforcement, is characterized in that comprising step:
1) metal material is used to form the closed cavity with cavity, as temperature regulator;
2) CT detector and temperature sensor are placed in closed cavity;
3) to closed cavity heating, heat is made by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, heat is added to closed cavity and carries out closed-loop control, thus the temperature constant of control CT detector.
5. the method for the accurate control CT detector temperature of closed loop enforcement according to claim 4, is characterized in that:
In described step 3) in, connecting heating tape at the outside surface of the metal material forming closed cavity, by giving the mode of this heating tape heating, closed cavity being heated.
6. the method for the accurate control CT detector temperature of closed loop enforcement according to claim 5, is characterized in that:
The heat passing to closed cavity is regulated by the power of this heating tape of regulating and controlling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741388.6A CN103713669B (en) | 2013-12-27 | 2013-12-27 | The device and method of the accurate control CT detector temperature that closed loop is implemented |
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| CN201310741388.6A CN103713669B (en) | 2013-12-27 | 2013-12-27 | The device and method of the accurate control CT detector temperature that closed loop is implemented |
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| Publication Number | Publication Date |
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| CN103713669A CN103713669A (en) | 2014-04-09 |
| CN103713669B true CN103713669B (en) | 2015-09-16 |
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| CN104898730B (en) * | 2015-03-31 | 2017-02-01 | 东北大学 | Electric heating energy storage device control system and method based on chopper circuit control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5444752A (en) * | 1994-02-03 | 1995-08-22 | Analogic Corporation | Tomography detector temperature equalization |
| US5982843A (en) * | 1997-10-10 | 1999-11-09 | Analogic Corporation | Closed loop air conditioning system for a computed tomography scanner |
| US20040022351A1 (en) * | 2002-07-30 | 2004-02-05 | Ge Medical Systems Global Technology Company, Llc | Thermoelectrically controlled x-ray detector array |
| US7313921B2 (en) * | 2003-10-28 | 2008-01-01 | General Electric Company | Apparatus and method for thermo-electric cooling |
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Address after: 100176 1st floor, building 8, 11 Kangding street, Beijing Economic and Technological Development Zone, Daxing District, Beijing Patentee after: Sinovision Technology (Beijing) Co.,Ltd. Address before: 100176 1st floor, No.13, Yongchang North Road, Yizhuang Economic Development Zone, Daxing District, Beijing Patentee before: SAINUO WEISHENG TECHNOLOGY (BEIJING) Co.,Ltd. |
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