CN103713669A - Device and method for precisely controlling temperature of CT detector in closed-loop mode - Google Patents
Device and method for precisely controlling temperature of CT detector in closed-loop mode Download PDFInfo
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- CN103713669A CN103713669A CN201310741388.6A CN201310741388A CN103713669A CN 103713669 A CN103713669 A CN 103713669A CN 201310741388 A CN201310741388 A CN 201310741388A CN 103713669 A CN103713669 A CN 103713669A
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Abstract
The invention relates to a device and method for precisely controlling the temperature of a CT detector in a closed-loop mode. The device comprises a sealed cavity, the CT detector, a temperature sensor, a controller, a heating device and a heat source of the heating device, wherein the sealed cavity serves as a temperature regulator, the CT detector and the temperature sensor are arranged in the sealed cavity heated by the heating device, the controller is used for carrying out closed-loop control over heating amount of the sealed cavity according to detection results from the temperature sensor by adjusting the heating device, and therefore the temperature of the CT detector can be kept constant. The method is convenient to put into practice, and the temperature of the detector can be precisely controlled. The device and method are mainly applied to detectors of CTs.
Description
Technical field
The present invention relates to a kind of device and method of accurate control CT detector temperature of closed loop enforcement.
Background technology
Computed tomograph scanner system (CT) records quantitatively X-ray with X-ray check device and sees through the attenuation after human body.Because the properties of materials that detecting device uses 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, conventionally there are two kinds of methods: a kind of is the temperature of controlling accurately detecting device, 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 proofreaies and correct according to the temperature characteristics of detecting device.Two kinds of methods cut both ways, and have in actual use application.
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 can accurately 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, thereby controls the temperature constant of CT detector.
Further: described closed cavity consists of with the carbon fiber board that covers this opening the metal shell with opening.
Further: described heating arrangement is arranged on the heating tape of closed cavity side.
Further: within described CT detector is suspended on closed cavity, and be connected with metal shell with the large material of thermal resistance.
Further: described temperature sensor adopts within the material of large thermal resistance is fixed on metal shell.
The method that the present invention adopts comprises step:
1) use metal material 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, make heat by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, closed cavity is added to heat and carry out closed-loop control, thus the temperature constant of control CT detector.
In described step 3) in, at the outside surface that forms the metal material of closed cavity, connect heating tape, by heat 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 that passes to closed cavity.
The present invention controls by the closed loop thermal to detector cell, arrives the constant of temperature, and then guarantees the stable and linear of X-ray check data, thereby obtains desirable image.
The present invention has the following advantages:
1. the temperature of detecting device accurately can be controlled in the scope of requirement;
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 and be a kind ofly convenient to implement, can accurately 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, thereby controls the temperature constant of CT detector.
Further: closed cavity consists of with the carbon fiber board that covers this opening the metal shell with opening.
Heating arrangement is arranged on the heating tape of closed cavity side.
Within CT detector is suspended on closed cavity, and be connected with metal shell with the large material of thermal resistance.
Temperature sensor adopts within the material of large thermal resistance is fixed on metal shell.
The method that the present invention adopts comprises step:
1) use metal material 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, make heat by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, closed cavity is added to heat and carry out closed-loop control, thus the temperature constant of control CT detector.
In described step 3) in, at the outside surface that forms the metal material of closed cavity, connect heating tape, by heat to the mode of this heating tape heating to closed cavity, the power by this heating tape of regulating and controlling regulates the heat that passes to closed cavity.
Innovative point of the present invention is mainly reflected in whole structure and measures control mode.
Below in conjunction with accompanying drawing, describe in detail.
Figure 1 shows that structural design of the present invention.The metal shell consisting of some metal supports 4 and carbon fiber board 2 have formed a closed cavity 3 with large thermal capacitance, and other not controlled thermal source is isolated in outside closed cavity 3, thereby have guaranteed 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, by controlling the power consumption of heating tape 5, just can be adjusted at the temperature in the closed cavity 3 under different environment temperatures.7 is uncontrollable thermal source, its heat need to be isolated in outside cavity.
Due to the upper cavity that uses large thermal capacitance of design, make the power consumption adjustment of heating tape 5 can not make cavity have large temperature fluctuation.Within CT detector 6 is suspended in closed cavity 3, and the material large by thermal resistance is connected with metal shell, so just, can guarantee that temperature can be directly delivered to CT detector 6 fast through the path of low thermal resistance, thereby further reduce the temperature fluctuation that the variation due to the temperature of metal shell causes.Within the material of the large thermal resistance of temperature sensor 1 same employing is fixed on closed cavity 3, because itself and controlled CT detector 6 have adopted same heat receive mode, and within being arranged on identical constant temperature cavity, so it can reflect the temperature of CT detector 6 truely and accurately.Can dynamically adjust by the result of temperature detection the power consumption of heating tape 5 thus, thereby reach the accurate closed-loop control to CT detector temperature.
Realize closed-loop control and need to adopt controller, controller adopts an arm processor, for controlling the temperature information of ADC chip collecting temperature sensor, according to the difference regulating and controlling heating tape conducting duty of actual temperature and target temperature, recently regulate the output power of heating tape, make the input heat of closed cavity and the amount balance of heat radiation, reach temperature stabilization.
Claims (8)
1. a device for the accurate control CT detector temperature that closed loop is implemented, 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, 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, thereby controls the temperature constant of CT detector.
2. the device of the accurate control CT detector temperature that closed loop as claimed in claim 1 is implemented, is characterized in that:
Described closed cavity consists of with the carbon fiber board that covers this opening the metal shell with opening.
3. the device of the accurate control CT detector temperature that closed loop as claimed in claim 1 is implemented, is characterized in that:
Described heating arrangement is arranged on the heating tape of closed cavity side.
4. the device of the accurate control CT detector temperature that closed loop as claimed in claim 1 is implemented, is characterized in that:
Within described CT detector is suspended on closed cavity, and be connected with metal shell with the large material of thermal resistance.
5. the device of the accurate control CT detector temperature that closed loop as claimed in claim 1 is implemented, is characterized in that:
Described temperature sensor adopts within the material of large thermal resistance is fixed on metal shell.
6. a method for the accurate control CT detector temperature that closed loop is implemented, is characterized in that comprising step:
1) use metal material 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, make heat by air transmitted and radiant heat transfer on CT detector and temperature sensor;
4) according to the testing result of temperature sensor, closed cavity is added to heat and carry out closed-loop control, thus the temperature constant of control CT detector.
7. the method for the accurate control CT detector temperature that closed loop according to claim 6 is implemented, is characterized in that:
In described step 3) in, at the outside surface that forms the metal material of closed cavity, connect heating tape, by heat to the mode of this heating tape heating to closed cavity.
8. the method for the accurate control CT detector temperature that closed loop according to claim 7 is implemented, is characterized in that:
Power by this heating tape of regulating and controlling regulates the heat that passes to closed cavity.
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN103713669A true CN103713669A (en) | 2014-04-09 |
| CN103713669B CN103713669B (en) | 2015-09-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898730A (en) * | 2015-03-31 | 2015-09-09 | 东北大学 | Electric heating energy storage device control system and method based on chopper circuit control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142177A (en) * | 1994-02-03 | 1997-02-05 | 模拟公司 | Tomegraphy detector temperature equalization |
| CN1273636A (en) * | 1997-10-10 | 2000-11-15 | 模拟技术有限公司 | Closed loop air conditioning system for computed tomography scanner |
| CN1475192A (en) * | 2002-07-30 | 2004-02-18 | GEҽ��ϵͳ����������˾ | Thermoelectric controlled x-ray detector array |
| US20050086948A1 (en) * | 2003-10-28 | 2005-04-28 | Milke-Rojo Jorge G. | Apparatus and method for thermo-electric cooling |
-
2013
- 2013-12-27 CN CN201310741388.6A patent/CN103713669B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142177A (en) * | 1994-02-03 | 1997-02-05 | 模拟公司 | Tomegraphy detector temperature equalization |
| CN1273636A (en) * | 1997-10-10 | 2000-11-15 | 模拟技术有限公司 | Closed loop air conditioning system for computed tomography scanner |
| CN1475192A (en) * | 2002-07-30 | 2004-02-18 | GEҽ��ϵͳ����������˾ | Thermoelectric controlled x-ray detector array |
| US20050086948A1 (en) * | 2003-10-28 | 2005-04-28 | Milke-Rojo Jorge G. | Apparatus and method for thermo-electric cooling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898730A (en) * | 2015-03-31 | 2015-09-09 | 东北大学 | Electric heating energy storage device control system and method based on chopper circuit control |
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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. |