Heat dissipation type closed thermoluminescence dosimeter

Abstract

The utility model relates to the technical field of analytical instruments, and particularly discloses a heat dissipation type closed thermoluminescence dosimeter which comprises a light condensation device and a heat dissipation body, the light condensation device adopts the design that the optical axis of a filter or a lens penetrates through the center of a middle support through hole to be coincided with the center of an end cover through hole, and the optical axis of the filter or the optical axis of the lens is coincided with the center of an end cover through hole. The heat dissipation main body comprises a first heat conduction face making contact with the middle support and a second heat conduction face making contact with the cold side of the semiconductor chilling plate, and a heat dissipation cavity is formed in the heat dissipation main body in a penetrating mode in the direction away from the middle support from the first heat conduction face. The photon counting head extends into the heat dissipation cavity, the detection chamber heats the to-be-tested object, the to-be-tested object emits photons, the photons irradiate the photon counting head through the light condensation device, the extreme temperature can be well reduced through the design, the temperature change of the cavity is small in the heating process, and detection is carried out in temperature fluctuation allowed by errors.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical instruments, and particularly discloses a heat-dissipating closed thermoluminescent dosimeter. Background Art

[0002] A thermoluminescent dosimeter (TLD) is a device used to measure radiation dose. It is widely used in medicine, industry, scientific research, and other fields, playing a particularly important role in radiation protection and dose monitoring. Certain materials, when exposed to ionizing radiation such as X-rays, gamma rays, or charged particles, can store information related to the radiation dose. When these materials are heated, they release this stored radiation information in the form of light, a phenomenon known as the thermoluminescence effect. By measuring this emitted light, a thermoluminescent dosimeter can quantitatively analyze radiation dose.

[0003] A thermoluminescent dosimeter primarily consists of a heating device, a photometer, and related electronic modules. These devices work together to heat a material that stores radiation information and measure the emitted light signal to determine the radiation dose. Existing thermoluminescent dosimeters suffer from deficiencies in optical sealing and focusing, resulting in poor concentration of emitted light energy, which reduces detection sensitivity and accuracy. Furthermore, the temperature control system suffers from instability, and high temperatures increase dose measurement deviations. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a heat dissipation closed type thermoluminescent dosimeter, comprising a detection chamber, the detection chamber is used to heat the sample to be tested,

[0005] The heat dissipation body comprises a first heat-conducting surface in contact with the middle bracket, and a second heat-conducting surface in contact with the cold side of the semiconductor refrigeration plate. A heat dissipation cavity is provided through the heat dissipation body from the first heat-conducting surface in a direction away from the middle bracket, and the photon counting head extends into the heat dissipation cavity.

[0006] In the first state, the detection chamber heats the sample to be tested, and the sample to be tested emits photons, which are irradiated to the photon counting head through the focusing device.

[0007] In some optional embodiments, the lower base, the material supporting mechanism, the lens base, the middle bracket, and the heat dissipation body are stacked and arranged to form a stacking structure, and the detection chamber includes a cavity opened along the stacking direction of the stacking structure. In the first state, the detection chamber is closed relative to the environment.

[0008] In some optional embodiments, the lower base, the material supporting mechanism, the lens base, the middle bracket, and the heat dissipation body are stacked and arranged to form a stacking structure, and the detection chamber includes a cavity opened along the stacking direction of the stacking structure. In the first state, the detection chamber is closed relative to the environment.

[0009] In some optional embodiments, the detection chamber is provided with a focusing device, which includes a transparent lens, a filter, and a lens sequentially arranged from the lower base toward the heat dissipation body.

[0010] In the first state, the photons are irradiated onto the photon counting head via the focusing device.

[0011] The optical axis of one or both of the filter 72 and the lens 81 passes through the through hole of the middle bracket 6 and the center of the through hole of the end cover 7, and passes through the object to be tested and the detection part of the photon counting head 51, as shown by the dotted line.

[0012] Preferably, the optical axes of the filter 72 and the lens 81 coincide with each other.

[0013] Preferably, the through hole of the middle bracket 6 and the end cover 7 are circular or regular polygonal.

[0014] In the first state, the detection chamber heats the sample to be tested, and the sample to be tested emits photons, which are projected onto the photon counting head through the transparent lens, filter, and lens.

[0015] In some optional embodiments, the hot side of the semiconductor refrigeration plate abuts against the heat sink, and the cold side of the semiconductor refrigeration plate contacts the second heat-conducting surface. The part of the second heat-conducting surface that does not abut against the semiconductor refrigeration plate is fixed with fins extending from the second heat-conducting surface toward the heat sink.

[0016] In some optional embodiments, a plurality of fins are provided on a side of the heat sink facing away from the second heat conducting surface, and the fins are extended, with the end points of the fins being in contact with the fan.

[0017] In some optional embodiments, the heat dissipation body further includes a third heat-conducting surface, and the third heat-conducting surface and the first heat-conducting surface are located on opposite sides of the heat dissipation body, and the opening size of the heat dissipation cavity located on the first heat-conducting surface is larger than the opening size away from the third heat-conducting surface.

[0018] In some optional embodiments, the heat dissipation body further includes a fourth heat conducting surface, the fourth heat conducting surface and the second heat conducting surface are located on opposite sides of the heat dissipation body, and a plurality of fins are provided on the surface of the fourth heat conducting surface.

[0019] In some optional embodiments, continuous S-shaped bending occurs during the extension of several of the fins.

[0020] In some optional embodiments, the heat dissipation body is provided with a thermistor, and the thermistor is connected to a fan circuit to control the fan speed.

[0021] In some optional embodiments, the material receiving mechanism is provided with a material receiving tray, the material receiving tray is used to load the sample to be tested, and the lens base is provided with a rotating shaft.

[0022] In the second state, the material receiving mechanism and the lens base move relative to each other, and the rotating shaft rotates to facilitate the material receiving mechanism to be dragged out, so that the material receiving tray contacts the environment.

[0023] In some optional embodiments, the lens base is provided with a positioning piece.

[0024] In the second state, the material-carrying mechanism and the lens base move relative to each other, and the positioning piece is used to indicate the position of the material-carrying mechanism relative to the lens base.

[0025] In some optional embodiments, the lower base is provided with a temperature sensor, the lower base is perforated, and the temperature sensor is in contact with the internal environment of the detection room.

[0026] The utility model has the following advantages:

[0027] The utility model has a good light-shielding effect, the error caused by ambient light on the measurement result is small, the temperature control is stable, the heat dissipation body can be well reduced, the cavity temperature changes little during the heating process, and detection is carried out within the temperature fluctuation allowed by the error. A focusing structure is further designed, and the input light source can be focused by setting the filter and the lens (81), and it is ensured that the light emitted by the thermoluminescence metering piece can be well incident on the measurement end face of the photon counting head (51), thereby solving the problem of low accuracy of the detection result caused by the focusing problem. In addition, this method uses a single component to solve the heat dissipation and light-shielding problems, has a simple structure, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Show the appearance of the utility model structure diagram;

[0029] Figure 2 Shows the internal structure diagram of the utility model;

[0030] Figure 3 Show Figure 2 Diagram of the internal structure after removing the transformer cover;

[0031] Figure 4 Show Figure 2 Cross-sectional view in the AA direction;

[0032] Figure 5 Show Figure 4 Local map;

[0033] Figure 6 Show Figure 5 Enlarged view at point B in the middle;

[0034] Figure 7 Shows the exploded view from the fan to the heat dissipation body;

[0035] Figure 8 2. Shows the main structure view of the heat dissipation;

[0036] Illustration:

[0037] 11. Lens base; 12. Lower base; 3. Material receiving mechanism; 31. Material receiving tray; 32. Positioning piece; 33. Temperature sensor; 35. Rotating shaft; 36. Guide rod; 4. Transformer cover; 5. Heat dissipation body; 50. Heat dissipation cavity; 51. Photon counting head; 52. Opening; 53. Fan; 54. Heat sink; 55. Thermistor; 56. Semiconductor cooling fin; 57. First heat-conducting surface; 58. Second heat-conducting surface; 59. Third heat-conducting surface; 60. Fourth heat-conducting surface; 601. Fin; 6. Middle bracket; 7. End cap; 72. Filter; 73. Transparent lens; 8. Lens base cover; 81. Lens; 9. Sealing ring; 10. Detection chamber; DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with specific embodiments. It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0039] Figure 1 Shows the external structure of the utility model.

[0040] like Figures 2 to 4 As shown, the present invention is specifically a heat dissipation closed type thermoluminescent dosimeter, comprising a detection chamber 10, wherein the detection chamber 10 is used to heat the sample to be tested.

[0041] The heat dissipation body 5 includes a first heat-conducting surface 57 in contact with the middle bracket 6 and a second heat-conducting surface 58 in contact with the cold side of the semiconductor refrigeration plate 56. The heat dissipation body 5 is provided with a heat dissipation cavity 50 extending from the first heat-conducting surface 57 to the direction away from the middle bracket 6. The photon counting head 51 extends into the heat dissipation cavity 50. The heat dissipation cavity 50, the first heat-conducting surface 57 and the second heat-conducting surface 58 are positioned as shown in FIG. Figures 7 to 8 shown.

[0042] In the first state, ie, the detection use state, the detection chamber 10 heats the sample to be tested, and the sample to be tested emits photons, which are irradiated to the photon counting head 51 through the focusing device.

[0043] In some optional embodiments, specifically, the focusing device includes a transparent lens 73, a filter 72, and a lens 81 sequentially arranged from the lower base 12 to the heat dissipation body 5, such as Figure 6 Shown in the Z direction.

[0044] In the first state, the photons are irradiated onto the photon counting head 51 via the focusing device.

[0045] In some optional embodiments, the detection chamber 10 has a chamber wall formed by the following structure: a lower base 12, a material holding mechanism 3, a lens base 11, a middle bracket 6, and a heat dissipation body 5 are stacked and arranged to form a stacking structure, and the detection chamber 10 includes a cavity opened along the stacking direction of the stacking structure. In the first state, the detection chamber 10 is closed relative to the environment, so that light and heat from the detection chamber 10 will not escape, thereby stabilizing the test conditions in the detection chamber 10.

[0046] In some optional embodiments, the lower base 12, material receiving mechanism 3, lens base 11, lens base cover 8, middle bracket 6, and heat dissipation body 5 are stacked and arranged, and adjacent contact parts use sealing rings 9 to seal gaps to increase the sealing effect of the detection chamber 10 relative to the environment.

[0047] In some optional embodiments, such as Figure 6 As shown, the optical axis of one or both of the filter 72 and the lens 81 passes through the through hole of the middle bracket 6 and the center of the through hole of the end cover 7, and passes through the object to be tested and the detection part of the photon counting head 51, as shown by the dotted line.

[0048] Preferably, the through holes of the middle bracket 6 and the through holes of the end cover 7 are circular or regular polygonal.

[0049] In the first state, the detection chamber 10 heats the sample to be tested, and the sample to be tested emits photons, which are projected onto the photon counting head 51 through the transparent lens 73 , the filter 72 , and the lens 81 .

[0050] In some optional embodiments, the hot side of the semiconductor refrigeration plate 56 abuts against the heat sink 54, and the cold side of the semiconductor refrigeration plate 56 contacts the second heat-conducting surface 58. The part of the second heat-conducting surface 58 that does not abut the semiconductor refrigeration plate 56 is fixed with a fin 601 extending from the second heat-conducting surface 58 toward the heat sink 54.

[0051] In some optional embodiments, a plurality of fins 601 are provided on the side of the heat sink 54 facing away from the second heat conducting surface 58 . The fins 601 are extended, and the end points of the extension of the fins 601 are in contact with the fan 53 .

[0052] In some optional embodiments, the heat dissipation body 5 further includes a third heat-conducting surface 59, and the third heat-conducting surface 59 and the first heat-conducting surface 57 are located on opposite sides of the heat dissipation body 5. The size of the opening 52 of the heat dissipation cavity 50 located on the first heat-conducting surface 57 is larger than the size of the opening 52 away from the third heat-conducting surface 59, which facilitates the user to disassemble and maintain the photon counting head 51.

[0053] like Figures 6 to 8 As shown, in some optional embodiments, the heat dissipation body 5 further includes a fourth heat conducting surface 60 , which is located on opposite sides of the heat dissipation body 5 from the second heat conducting surface 58 , and a plurality of fins 601 are provided on the surface of the fourth heat conducting surface 60 .

[0054] Preferably, a plurality of the fins 601 undergo continuous S-shaped bending during the extension process, and the continuous S-shaped bending increases the air contact area, which is beneficial to heat dissipation.

[0055] In some optional embodiments, the heat dissipation body 5 is provided with a thermistor 55 , which is connected to the fan 53 circuit to control the speed of the fan 53 and thereby control the dissipation rate of heat emitted from the hot side of the semiconductor refrigeration plate 56 .

[0056] In some optional embodiments, the material receiving mechanism 3 is provided with a material receiving tray 31, and the material receiving tray 31 is used to load the sample to be tested, and the lens base 11 is provided with a rotating shaft 35.

[0057] like Figure 5 As shown, in the second state, that is, the sample loading and unloading state, the material receiving mechanism 3 and the lens base 11 move relative to each other, such as in the direction of the X arrow, and the rotating shaft 35 rotates to facilitate the dragging of the material receiving mechanism 3, so that the material receiving tray 31 contacts the environment, and the user can put in or remove the sample into the material receiving tray 31.

[0058] Preferably, the material holding mechanism 3 is provided with a guide rod 36 , and when the material holding mechanism 3 moves in the direction of the X arrow, it moves linearly under the action of the guide rod 36 .

[0059] Preferably, the lens base 11 is provided with a positioning piece 32.

[0060] In the second state, the material supporting mechanism 3 and the lens base 11 move relative to each other, and the positioning piece 32 is used to indicate the position of the material supporting mechanism 3 relative to the lens base 11 .

[0061] In some optional embodiments, the lower base 12 is provided with a temperature sensor 33. The lower base 12 is perforated, and the temperature sensor 33 is in contact with the environment in the detection chamber 10. The sample in the detection chamber 10 is heated by a heating device, and the temperature sensor 33 senses the temperature in the detection chamber 10 to accurately control the degree of heating.

[0062] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A heat dissipation closed type thermoluminescent dosimeter, comprising a heat dissipation body (5) and a detection chamber (10), wherein the detection chamber (10) is used to heat a sample to be tested. It is characterized by: The heat dissipation body (5) includes a first heat-conducting surface (57) in contact with the middle bracket (6), and a second heat-conducting surface (58) in contact with the cold side of the semiconductor refrigeration plate (56). The heat dissipation body (5) is provided with a heat dissipation cavity (50) extending from the first heat-conducting surface (57) in a direction away from the middle bracket (6). The photon counting head (51) extends into the heat dissipation cavity (50). In the first state, the detection chamber (10) heats the sample to be tested, and the sample to be tested emits photons, which are irradiated by the focusing device onto the photon counting head (51).

2. The heat dissipation sealed thermoluminescent dosimeter according to claim 1, characterized in that: The lower base (12), the material receiving mechanism (3), the lens base (11), the middle bracket (6), and the heat dissipation body (5) are stacked and arranged to form a stacked structure. The detection chamber (10) includes a cavity opened along the stacking direction of the stacked structure. In a first state, the detection chamber (10) is closed relative to the environment.

3. The heat dissipation sealed thermoluminescent dosimeter according to claim 1, characterized in that: The detection chamber (10) is provided with a focusing device, which includes a transparent lens (73), a filter (72), and a lens arranged in sequence from the lower base (12) to the heat dissipation body (5). In the first state, the photons are irradiated onto the photon counting head (51) via the focusing device.

4. The heat dissipation sealed thermoluminescent dosimeter according to claim 3, characterized in that: The optical axis of the filter (72) or lens (81) passes through the center of the through hole of the middle bracket (6) and the center of the through hole of the end cover (7), and passes through the object to be tested and the detection part of the photon counting head (51), and / or the through hole of the middle bracket and the end cover are circular or regular polygonal, and / or the optical axes of the filter (72) or lens (81) coincide with each other; In the first state, the detection chamber (10) heats the sample to be tested, and the sample to be tested emits photons, which are projected onto the photon counting head (51) through the transparent lens (73), the filter (72), and the lens (81).

5. The heat dissipation sealed thermoluminescent dosimeter according to claim 1, characterized in that: The hot side of the semiconductor refrigeration plate (56) abuts against the heat sink (54), and the cold side of the semiconductor refrigeration plate (56) contacts the second heat conducting surface (58). The portion of the second heat conducting surface (58) not abutting against the semiconductor refrigeration plate (56) is fixed with a fin (601) extending from the second heat conducting surface (58) toward the heat sink (54).

6. The heat dissipation sealed thermoluminescent dosimeter according to claim 5, characterized in that: The heat sink (54) is provided with a plurality of fins (601) on the side facing away from the second heat-conducting surface (58), the fins (601) are extended, and the extension end of the fins (601) contacts the fan (53), and / or the heat dissipation body (5) further includes a third heat-conducting surface (59), the third heat-conducting surface (59) and the first heat-conducting surface (57) are located on opposite sides of the heat dissipation body (5), the size of the opening (52) of the heat dissipation cavity (50) located on the first heat-conducting surface (57) is larger than the size of the opening (52) away from the third heat-conducting surface (59), and / or the heat dissipation body (5) further includes a fourth heat-conducting surface (60), the fourth heat-conducting surface (60) and the second heat-conducting surface (58) are located on opposite sides of the heat dissipation body (5), and the surface of the fourth heat-conducting surface (60) is provided with a plurality of fins (601).

7. The heat dissipation sealed thermoluminescent dosimeter according to claim 6, characterized in that: Several of the fins (601) undergo continuous S-shaped bending during their extension.

8. The heat dissipation sealed thermoluminescent dosimeter according to claim 1, characterized in that: The heat dissipation body (5) is provided with a thermistor (55), and the thermistor (55) is connected to the fan (53) circuit to control the rotation speed of the fan (53).

9. The heat dissipation sealed thermoluminescent dosimeter according to claim 2, characterized in that: The material receiving mechanism (3) is provided with a material receiving tray (31), and the material receiving tray (31) is used to load the sample to be tested. The lens base (11) is provided with a rotating shaft (35). In the second state, the material receiving mechanism (3) and the lens base (11) move relative to each other, and the rotating shaft (35) rotates to facilitate the material receiving mechanism (3) to be dragged out, so that the material receiving tray (31) contacts the environment. And / or, the lens base (11) is provided with a positioning piece (32), In the second state, the material-carrying mechanism (3) and the lens base (11) move relative to each other, and the positioning piece (32) is used to indicate the position of the material-carrying mechanism (3) relative to the lens base (11).

10. The heat dissipation sealed thermoluminescent dosimeter according to claim 2, characterized in that: The lower base (12) is provided with a temperature sensor (33), the lower base (12) is perforated, and the temperature sensor (33) is in contact with the environment inside the detection chamber (10).

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