Energy-discriminating thermoluminescent dosimeter

Abstract

The present invention relates to the field of radiation dose monitoring technology, in particular, to an energy-discriminating thermoluminescent dosimeter. The thermoluminescent dosimeter comprises a housing, a detector carrier and a barrier mechanism located inside the housing, wherein the housing is worn on clothing through a clamping component; the detector carrier is rotatably arranged inside the housing, and a plurality of thermoluminescent detectors are arranged inside the detector carrier. In the energy-discriminating thermoluminescent dosimeter, the barrier mechanism is driven to rotate by utilizing the inertial force of the wearer during movement, so that the barrier mechanism can be away from or close to the thermoluminescent detector, thereby realizing the shielding and opening of the thermoluminescent detector according to the state of the wearer, reducing the intensity of radiation irradiation to the thermoluminescent detector when the wearer is not wearing the thermoluminescent dosimeter, thereby minimizing the difference between the radiation collected by the thermoluminescent dosimeter and the radiation received by the worker.

Description

Technical Field

[0001] The invention relates to the technical field of radiation dose monitoring, in particular to an energy discrimination type thermoluminescent dose meter. Background Art

[0002] At present, thermoluminescent dosimeters reflect the size of radiation doses through the thermoluminescence intensity of certain substances caused by radiation. They are widely used in various fields of clinical dosimetry, mostly for detecting personal doses. They are also used in environmental testing to detect the gamma dose level in the environment.

[0003] Personal dose monitoring refers to the monitoring of workers' exposure dose in radiation workplaces. It is different from ionization chamber dosimeters in that it measures cumulative doses, i.e., the total exposure dose of workers working in a certain radiation field for a period of time. The monitoring period is generally 2-3 months, which is ideal because it can meet the measurement needs and detect abnormal phenomena as early as possible. It is best for each worker to be equipped with two dosimeters, one for wearing and the other as a spare, that is, to rotate, to prevent the exposure dose from being missed during the monitoring period, and more importantly, to prevent the loss of exposure dose data due to abnormal exposure during the period.

[0004] Currently, there are two types of dosimeters on the market: energy identification type and ordinary type. Ordinary type dosimeters cannot perform energy identification. Energy identification type thermoluminescent dosimeters are mostly filtering type, and their principle is to use the filtering effect of filters on rays of different energies to identify the energy of the rays.

[0005] Thermoluminescent dosimeters are used as follows: First, wear the dosimeter on the chest, hands or other parts of the body, and the thermoluminescent detector collects the radiation dose. When the monitoring period is reached, that is, 2-3 months, the dosimeter is then placed on the measuring instrument for detection.

[0006] However, most of the current thermoluminescent dosimeters collect radiation around the clock. That is to say, as long as the worker is in a radiation workplace, the thermoluminescent dosimeter will collect the radiation dose regardless of whether the worker is wearing a thermoluminescent dosimeter. Then, when the worker is not wearing a thermoluminescent dosimeter, if the thermoluminescent dosimeter is close to the radiation workplace, the thermoluminescent dosimeter is still likely to collect the radiation dose, resulting in a large gap between the radiation collected by the thermoluminescent dosimeter and the radiation received by the worker. Summary of the invention

[0007] The object of the present invention is to provide an energy-discriminating thermoluminescent dosimeter to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, an energy discrimination thermoluminescent dosimeter is provided, comprising a housing, and a detector carrier and a blocking mechanism located inside the housing, wherein the housing is worn on clothing through a clamping component;

[0009] The detector carrier is rotatably arranged inside the shell, and a plurality of thermoluminescent detectors are arranged inside the detector carrier. Meanwhile, the center of gravity of the detector carrier is located below the rotation connection point between the detector carrier and the shell, so that the detector carrier swings by inertia when the wearer moves;

[0010] The blocking mechanism is rotatably arranged inside the shell; when worn, the blocking mechanism is detached from the front of the thermoluminescent detector in a rotational manner under the action of the swing of the detector carrier, so that the thermoluminescent detector receives the irradiation of the radiation; when not worn, the blocking mechanism is reset to the front of the thermoluminescent detector to block the irradiation of the thermoluminescent detector by the radiation.

[0011] As a further improvement of the technical solution, a rotating cavity is arranged inside the shell, a transverse shaft rod is arranged at the center of the rotating cavity, and the end of the shaft rod is fixed to the side wall of the rotating cavity.

[0012] As a further improvement of the present technical solution, the detector carrier includes a rotating block, which is rotatably set on the outer ring of the shaft through an axial hole set inside the rotating block. A recess for placing the thermoluminescence detector is set on the side of the rotating block away from the wearer, and a limit plate is detachably set on the side of the rotating block close to the thermoluminescence detector.

[0013] As a further improvement of the technical solution, the weight of the bottom of the rotating block is greater than the weight of the top, so that the center of gravity of the rotating block is located below the shaft hole.

[0014] As a further improvement of the technical solution, a one-way driving member is provided at the bottom of the rotating block, and the one-way driving member drives the blocking mechanism through the swing of the rotating block;

[0015] The one-way driving member includes a rotating shaft arranged at both ends of the bottom of the rotating block, and a driving plate which can rotate unidirectionally on the outer ring of the rotating shaft;

[0016] The one-way driving member also includes a driven ring with a tooth groove on the inner ring, and the outer ring of the driven ring contacts the inner ring of the rotating chamber to enable a rotational connection between the two; the driven ring is connected to the blocking mechanism, and the bottom end of the driving plate extends into the tooth groove to drive the driven ring to rotate during the swinging process of the rotating block.

[0017] As a further improvement of the technical solution, a baffle is provided on one side of the driving plate, and the baffle is longitudinally slidably arranged in a slideway penetrating the side wall of the rotating block, and a top rod longitudinally sliding through the bottom of the shell is provided at the bottom of the baffle.

[0018] As a further improvement of the present technical solution, the blocking mechanism is a blocking plate with driven rings fixedly connected at both ends, and the blocking plate is rotatably arranged in the inner ring of the rotating chamber; the weight of the bottom end of the blocking plate is greater than the weight of the top end, so that the blocking plate can be automatically reset.

[0019] As a further improvement of the technical solution, the baffle is made of lead material.

[0020] As a further improvement of the technical solution, a convex block is fixedly arranged inside the rotating cavity, and a space for placing the driven ring is left between the two sides of the convex block and the side wall of the rotating cavity;

[0021] The bottom end of the protrusion abuts against the bottom end of the blocking plate in a rotating state, limiting the blocking plate in this state in front of the thermoluminescent detector; the top end of the protrusion abuts against the top end of the blocking plate after rotation, limiting the bottom end of the blocking plate to the side of the shell close to the thermoluminescent detector.

[0022] As a further improvement of the technical solution, multiple thermoluminescent detectors are arranged longitudinally; a metal filter is provided at the bottom end of the baffle plate, and an insertion rod that can be inserted into the rotating cavity is provided on the outer ring of the outer shell, and the insertion rod is located on the rotation path of the baffle plate. When the insertion rod penetrates into the rotating cavity, the insertion rod blocks the metal filter in front of the thermoluminescent detector located above.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the energy-discriminating thermoluminescent dosimeter, the inertial force of the wearer's movement is used to drive the blocking mechanism to rotate, so that the blocking mechanism can be moved away from or close to the thermoluminescent detector, thereby realizing the shielding and opening of the thermoluminescent detector according to the state of the wearer, reducing the intensity of radiation exposure to the thermoluminescent detector when the wearer is not wearing it, thereby minimizing the difference between the radiation collected by the thermoluminescent dosimeter and the radiation received by the staff.

[0025] 2. In the energy identification thermoluminescent dosimeter, the rotation of the baffle plate can not only block and open the thermoluminescent detector, but also filter part of the thermoluminescent detector by means of rotation adjustment, thereby using the ratio of the radiation received by the two parts of the thermoluminescent detectors for energy identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the housing of the present invention;

[0028] Figure 3 The structure of the detector carrier of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 4 The structure of the detector carrier of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 5 For the present invention Figure 3 A schematic diagram of the structure at A;

[0031] Figure 6 It is a structural schematic diagram of the barrier mechanism of the present invention;

[0032] Figure 7 It is a schematic diagram of the working state structure of the baffle plate of the present invention;

[0033] Figure 8 It is a schematic diagram of the working state structure of the ejector rod of the present invention;

[0034] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure at B;

[0035] Fig.10 It is a schematic structural diagram of the metal filter of the present invention.

[0036] The meaning of each number in the figure is:

[0037] 100. Housing; 101. Shaft; 102. Bump; 103. Rotating cavity; 104. Connecting rod; 105. Connecting belt; 106. Inserting rod; 110. Detector carrier; 111. Rotating block; 112. Shaft hole; 113. Limiting plate; 114. Rotating shaft; 115. Driving plate; 116. Baffle; 117. Slideway; 120. Blocking mechanism; 121. Blocking plate; 122. Driven ring; 123. Tooth groove; 124. Metal filter; 130. Push rod; 131. Groove; 200. Thermoluminescent detector. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] See also Figure 1 As shown, an energy discrimination thermoluminescent dosimeter is provided, comprising a housing 100, a detector carrier 110 and a blocking mechanism 120 located inside the housing 100, wherein the housing 100 may be spherical, square or other polygonal. Figure 1 The shape of the shell 100 shown is based on the above. The shell 100 is composed of two hemispherical shells, which can be connected by bonding, snap-fitting, plugging, etc. At the same time, since the outer ring of the spherical shell 100 is relatively smooth, in order to prevent the shell 100 from rotating during wearing, a transverse connecting rod 104 is provided on the top of the shell 100, and the connecting rod 104 is externally connected to a connecting belt 105. The end of the connecting belt 105 can be provided with a clip or other components to enable the shell 100 to be worn on the clothes of the staff. In addition, a plane is provided at the bottom of the shell 100 to facilitate the placement of the shell 100 and prevent the shell 100 from rolling after placement.

[0042] like Figure 2 As shown, a rotating cavity 103 is provided inside the housing 100, a transverse shaft 101 is provided at the center of the rotating cavity 103, and the end of the shaft 101 is fixed to the side wall of the rotating cavity 103 for the rotation of a detector carrier 110 to be described in detail below.

[0043] In addition, a protrusion 102 is fixedly disposed inside the rotating cavity 103, and a gap is left between the two sides of the protrusion 102 and the side wall of the rotating cavity 103 for the placement of a driven ring 122 to be described in detail below. Figure 4 and Figure 7The bottom end of the protrusion 102 abuts against the bottom end of the blocking plate 121 (described in detail below) in a rotating state, limiting the blocking plate 121 in this state in front of the thermoluminescent detector 200; the top end of the protrusion 102 abuts against the top end of the rotating blocking plate 121, limiting the bottom end of the blocking plate 121 to the side of the housing 100 close to the thermoluminescent detector 200, so that the heavier part of the bottom end of the blocking plate 121 can always be on the side of the housing 100 close to the thermoluminescent detector 200, thereby facilitating the resetting of the blocking plate 121 after rotation.

[0044] The detector carrier 110 is rotatably disposed inside the housing 100, and a plurality of thermoluminescent detectors 200 are disposed inside the detector carrier 110. Meanwhile, the center of gravity of the detector carrier 110 is located below the rotation connection point between the detector carrier 110 and the housing 100, so that the detector carrier 110 swings due to inertia when the wearer moves. Figure 3 In the embodiment shown, the rotating block 111 is rotatably arranged on the outer ring of the shaft 101 through the shaft hole 112 arranged inside the rotating block 111. A plane is arranged on the side of the rotating block 111 away from the wearer, and an inward depression is arranged on the plane, and the thermoluminescent detector 200 is placed through the depression. In order to prevent the thermoluminescent detector 200 from falling out of the depression due to shaking. The present invention sets a limit plate 113 on the plane on one side of the rotating block 111, and the limit plate 113 can be connected to the plane on one side of the rotating block 111 by bonding, snapping, plugging, etc. As an example, Figure 3 The plug-in method is adopted, specifically, horizontal slots are set above and below the plane on one side of the rotating block 111, and the thickness of the slots is consistent with the thickness of the limiting plate 113. By inserting the limiting plate 113 into the slot, the limiting plate 113 can be covered on the plane on one side of the rotating block 111.

[0045] Furthermore, the weight of the bottom of the rotating block 111 is greater than the weight of the top, so that the center of gravity of the rotating block 111 is located below the shaft hole 112. Figure 3 In the embodiment shown, the bottom of the rotating block 111 is protruded downward, and the weight of the protruding part is applied to the bottom of the rotating block 111, so that the weight of the bottom of the rotating block 111 is greater than the weight of the top. In this way, when the wearer walks, the inertia generated by walking causes the rotating block 111 to swing back and forth.

[0046] In addition, a one-way driving member is provided at the bottom of the rotating block 111, and the one-way driving member drives the blocking mechanism 120 through the swing of the rotating block 111. Figure 5As shown, the one-way driving member includes a rotating shaft 114 disposed at both ends of the bottom of the rotating block 111, and a driving plate 115 that is rotatably disposed on the outer ring of the rotating shaft 114. A baffle 116 is disposed on one side of the driving plate 115. From the perspective of the observer, the baffle 116 is located on the right side of the driving plate 115. In this way, due to the restriction of the baffle 116, the driving plate 115 can only rotate in one direction (i.e., the left side). At the same time, the baffle 116 can also be separated from the side wall of the driving plate 115 to release the restriction on the one-way rotation of the driving plate 115. Figure 5 and Figure 8 As shown, the baffle 116 is longitudinally slidably arranged in a slideway 117 that penetrates the side wall of the rotating block 111, and a push rod 130 that longitudinally slides and penetrates the bottom of the housing 100 is arranged at the bottom of the baffle 116. The push rod 130 is thick at both ends and thin in the middle to prevent the push rod 130 from being separated from the housing 100. In this way, when the push rod 130 pushes the baffle 116 upward, the baffle 116 can move up in the slideway 117, thereby separating from the side wall of the driving plate 115. At the same time, in order to meet the height of the push rod 130 pushing the baffle 116 as much as possible, a groove 131 for the push rod 130 to enter is arranged at the bottom of the rotating block 111.

[0047] The one-way driving member further includes a driven ring 122 having a tooth groove 123 in its inner ring, and the outer ring of the driven ring 122 contacts the inner ring of the rotating chamber 103 to achieve a rotational connection between the two. In addition, the driven ring 122 is connected to the blocking mechanism 120, and the bottom end of the driving plate 115 extends into the tooth groove 123, thereby driving the driven ring 122 to rotate during the swinging process of the rotating block 111.

[0048] The blocking mechanism 120 is rotatably disposed inside the housing 100; when the energy identification thermoluminescent dosimeter of the present invention is worn, the blocking mechanism 120 is detached from the front of the thermoluminescent detector 200 in a rotational manner under the action of the swinging of the detector carrier 110, so that the thermoluminescent detector 200 is irradiated by radiation; when the energy identification thermoluminescent dosimeter of the present invention is not worn, the blocking mechanism 120 is reset to the front of the thermoluminescent detector 200, so as to block the radiation from irradiating the thermoluminescent detector 200. Among them, the blocking mechanism 120 is a blocking plate 121 with both ends fixedly connected to the driven ring 122, and the blocking plate 121 is in the shape of an arc, and its curvature corresponds to the curvature of the inner circle of the rotating cavity 103, so as to realize the rotation in the inner circle of the rotating cavity 103. The blocking plate 121 is preferably made of lead material with better radiation shielding effect. Figure 7As shown in the state of the shell 100 in the middle, the right side of the shell 100 fits the chest of the wearer, and the left side is away from the wearer. The blocking plate 121 is located on the left side of the shell 100, and when not worn, the blocking plate 121 is also located on the left side of the shell 100, so as to block the rays in front of the thermoluminescent detector 200 and reduce the radiation of the thermoluminescent detector 200. At the same time, the weight of the bottom end of the blocking plate 121 is greater than the weight of the top end, so that the blocking plate 121 is automatically reset. Specifically, for example, the blocking plate 121 can be set to a structure with a thick bottom end and a thin top end, or a solid bottom end and a hollow top end.

[0049] Combination Figure 7-Figure 9 When the energy discrimination thermoluminescent dosimeter of the present invention is used, first, Figure 7 As shown in the state of the shell 100 in the figure, the right side of the shell 100 fits the chest of the wearer, while the left side is away from the wearer. When the energy identification thermoluminescent dosimeter is worn, the shell 100 is in a suspended state, and the top rod 130 slides downward by its own gravity, breaking away from the restriction of the baffle 116. At this time, the baffle 116 moves down to the side wall of the drive plate 115, limiting the drive plate 115 to a one-way rotation state. When the wearer walks, the rotating block 111 will swing back and forth in the left and right directions due to the inertial force during movement. During the swinging of the rotating block 111 to the right, although the drive plate 115 is located in the tooth groove 123, the drive plate 115 is not fixed, so the drive plate 115 will rotate to the left at this time, thereby failing to apply a driving force to the driven ring 122. During the swinging of the rotating block 111 to the left, the driving plate 115 cannot rotate to the right due to the restriction of the baffle 116, so the baffle 116 drives the driven ring 122 to rotate to the left through the tooth groove 123, and the driven ring 122 drives the blocking plate 121 to rotate to the left (i.e. clockwise). When the top of the blocking plate 121 abuts against the top of the protrusion 102, the blocking plate 121 is separated from the front of the thermoluminescent detector 200, and the blocking plate 121 can collect radiation. At the same time, since the protrusion 102 restricts the blocking plate 121 from rotating, the rotating block 111 cannot drive the blocking plate 121, and the rotating block 111 is also fixed at this time.

[0050] When the energy discrimination thermoluminescent dosimeter is not worn, the housing 100 is placed on a support such as a table, and the push rod 130 is pushed by the support, thereby moving upward to push the baffle 116, so that the baffle 116 moves upward and separates from the side wall of the driving plate 115. At this time, the driving plate 115 is in a free rotation state, and thus can no longer restrict the driven ring 122 and the blocking plate 121 through the tooth groove 123. Since the weight of the bottom end of the blocking plate 121 is relatively high, the blocking plate 121 begins to reset to the front of the thermoluminescent detector 200 by gravity, thereby reducing the radiation exposure to the thermoluminescent detector 200.

[0051] That is to say, by utilizing the inertial force of the wearer's movement to drive the blocking mechanism 120 to rotate, the blocking mechanism 120 can be moved away from or close to the thermoluminescent detector 200, thereby realizing the shielding and opening of the thermoluminescent detector 200 according to the state of the wearer, reducing the intensity of radiation exposure to the thermoluminescent detector 200 when the wearer is not wearing it, thereby minimizing the difference between the radiation collected by the thermoluminescent dosimeter and the radiation received by the staff.

[0052] In addition, the present invention can also realize energy identification. Specifically, in another embodiment, multiple thermoluminescent detectors 200 are arranged longitudinally; at the same time, a metal filter 124 is arranged at the bottom end of the baffle plate 121, and the metal filter 124 can be an aluminum sheet, a copper sheet or a tin sheet with a density ranging from small to large. A plug 106 that can be inserted into the rotating cavity 103 is arranged on the outer ring of the housing 100, and the plug 106 is located on the rotation path of the baffle plate 121. When the plug 106 penetrates into the rotating cavity 103, the plug 106 blocks the metal filter 124 in front of the thermoluminescent detector 200 located above. In this way, since the metal filter 124 is located in front of a portion (i.e., located at the top) of the thermoluminescent detector 200, the radiation received by this portion of the thermoluminescent detector 200 is filtered by the metal filter 124, while the radiation received by the other portion (i.e., located above and below) of the thermoluminescent detector 200 is directly irradiated. Therefore, based on the measurement results of the two portions of the thermoluminescent detectors 200, the ratio of the count value of the thermoluminescent detector 200 located at the top to the count value of the thermoluminescent detector 200 located above and below is calculated, and the energy of the radiation can be determined by checking the energy response curve (dose ratio and energy response tests are performed in advance and the curve is drawn), thereby achieving the purpose of energy identification, such as identifying low-energy X-rays and gamma rays.

[0053] It can be seen that the rotation of the blocking plate 121 can not only block and open the thermoluminescent detector 200, but also filter part of the thermoluminescent detector 200 by means of rotation adjustment, thereby using the ratio of the radiation amounts of the two parts of the thermoluminescent detector 200 for energy identification.

[0054] It should be noted that the front of the thermoluminescent detector 200 mentioned above can be understood as the direction in which the wearer's face is facing.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An energy-discriminating thermoluminescent dosimeter, comprising a housing, a detector carrier and a barrier mechanism located inside the housing, wherein: The shell is worn on clothing through a clamping component; the characteristics are: The detector carrier is rotatably arranged inside the shell, and a plurality of thermoluminescent detectors are arranged inside the detector carrier. Meanwhile, the center of gravity of the detector carrier is located below the rotation connection point between the detector carrier and the shell, so that the detector carrier swings by inertia when the wearer moves; The blocking mechanism is rotatably arranged inside the housing; when the wearer is wearing the device, the blocking mechanism is rotatably separated from the front of the thermoluminescent detector under the action of the swing of the detector carrier, so that the thermoluminescent detector receives the radiation; when the wearer is not wearing the device, the blocking mechanism is reset to the front of the thermoluminescent detector to block the radiation from irradiating the thermoluminescent detector; The detector carrier includes a rotating block; A one-way driving member is provided at the bottom of the rotating block, and the one-way driving member drives the blocking mechanism through the swing of the rotating block; The one-way driving member includes a rotating shaft arranged at both ends of the bottom of the rotating block, and a driving plate which can rotate unidirectionally on the outer ring of the rotating shaft; The one-way driving member also includes a driven ring with a tooth groove on the inner ring, and the outer ring of the driven ring contacts the inner ring of the rotating chamber to enable a rotational connection between the two; the driven ring is connected to the blocking mechanism, and the bottom end of the driving plate extends into the tooth groove to drive the driven ring to rotate during the swinging process of the rotating block.

2. The energy discrimination thermoluminescent dosimeter according to claim 1, characterized in that: A rotating cavity is arranged inside the shell, a transverse shaft rod is arranged at the center of the rotating cavity, and the end of the shaft rod is fixed to the side wall of the rotating cavity.

3. The energy discrimination thermoluminescent dosimeter according to claim 2, characterized in that: The rotating block is rotatably arranged on the outer ring of the shaft through the shaft hole arranged inside the rotating block, a depression for placing the thermoluminescence detector is arranged on the side of the rotating block away from the wearer, and a limit plate is detachably arranged on the side of the rotating block close to the thermoluminescence detector.

4. The energy discrimination thermoluminescent dosimeter according to claim 3, characterized in that: The weight of the bottom of the rotating block is greater than the weight of the top, so that the center of gravity of the rotating block is located below the shaft hole.

5. The energy discrimination thermoluminescent dosimeter according to claim 1, characterized in that: A baffle is arranged on one side of the driving plate, and the baffle is longitudinally slidably arranged in a slideway penetrating the side wall of the rotating block, and a top rod longitudinally slidingly penetrating the bottom of the shell is arranged at the bottom of the baffle.

6. The energy discrimination thermoluminescent dosimeter according to claim 1, characterized in that: The blocking mechanism is a blocking plate with driven rings fixedly connected at both ends, and the blocking plate is rotatably arranged in the inner ring of the rotating cavity; the weight of the bottom end of the blocking plate is greater than the weight of the top end, so that the blocking plate can be automatically reset.

7. The energy-discriminating thermoluminescent dosimeter according to claim 6, characterized in that: The blocking plate is made of lead material.

8. The energy-discriminating thermoluminescent dosimeter according to claim 6, characterized in that: A convex block is fixedly arranged inside the rotating cavity, and a space for placing a driven ring is left between the two sides of the convex block and the side wall of the rotating cavity; The bottom end of the protrusion abuts against the bottom end of the blocking plate in a rotating state, limiting the blocking plate in this state in front of the thermoluminescent detector; the top end of the protrusion abuts against the top end of the blocking plate after rotation, limiting the bottom end of the blocking plate to the side of the shell close to the thermoluminescent detector.

9. The energy discrimination thermoluminescent dosimeter according to claim 6, characterized in that: Multiple thermoluminescent detectors are arranged longitudinally; a metal filter is provided at the bottom end of the baffle plate, and an insertion rod that can be inserted into the rotating cavity is provided on the outer ring of the shell, and the insertion rod is located on the rotation path of the baffle plate. When the insertion rod penetrates into the rotating cavity, the insertion rod blocks the metal filter in front of the thermoluminescent detector located above.

Images