A device for measuring variable temperature long afterglow characteristics

Abstract

The present application discloses a device for measuring variable temperature long afterglow characteristics, which adopts an electromechanical solution to realize single-path gating of the excitation light path and the detection light path, and solves the problem of signal tailing caused by strong scattered light before power failure and signal fluctuation caused by power failure when the power-on and power-off mode is adopted. The measuring device includes an excitation light source, a variable temperature component, a detection component and an adjustment component; the variable temperature component is located below the adjustment component, and the excitation light source and the detection component are both located above the adjustment component; the adjustment component includes a turntable, a driving source and a plurality of lenses, the turntable is located above the lens, and a plurality of turntable through holes used in conjunction with the lenses are provided on the turntable surface, and the driving source is connected to the turntable; the excitation light source and the detection component are respectively connected to different lens optical paths in the adjustment component; in the adjustment component, the driving source drives the turntable to rotate to adjust the relative position of the turntable through hole and the lens, so that the lens is in a light-transmitting state or a light-blocking state.

Description

Technical Field

[0001] The present application relates to a device for measuring variable temperature long afterglow characteristics, belonging to the field of optical testing instruments. Background Art

[0002] Afterglow materials are photoluminescent materials that can continue to emit light for a few seconds to a few hours after being irradiated with light. Long afterglow materials are afterglow materials that can emit light for a long time (generally more than 1 hour). This material can be used for emergency display, safety lighting, radiation detection, etc., and is widely used in military aviation, medical imaging, traffic signs, optoelectronic devices and other fields.

[0003] In the prior art, one way to test long afterglow materials is to first place the long afterglow material in the dark and heat it up to empty its trap, then irradiate the material with external light, stop irradiation, and then continue to heat it up to measure the characteristic curve of its luminescence changing with temperature; another thermoluminescence characteristic test is to control the time of extinguishing and lighting the excitation light, as well as the acquisition time of the detection system, through software to achieve irradiation and detection light path gating. However, in the scheme of measuring afterglow characteristics by power on and off: if a photomultiplier tube is used for detection, the signal fluctuation generated when the power is on and off will cause the photomultiplier tube signal to be unstable; if a fiber optic spectrometer is used for detection, the CCD is always in a light-transmitting or even overexposed state when the excitation light is irradiated, which will cause the background signal in the CCD to accumulate and tail the signal and cannot be deducted during detection. Summary of the invention

[0004] According to the present application, a device for measuring variable-temperature long afterglow characteristics is provided. The relative positions of the turntable through hole and the lens are adjusted by a motor, and positioning pins are used to assist in single-path selection of the excitation light path and the detection light path, thereby solving the problems of signal tailing caused by strong scattered light before power failure and signal fluctuation caused by power failure when using the power-on and power-off mode.

[0005] A device for measuring variable temperature long afterglow characteristics. The device comprises an excitation light source, a variable temperature component, a detection component and an adjustment component.

[0006] The temperature-changing component is connected below the regulating component, and the excitation light source and the detection component are both connected above the regulating component;

[0007] The adjustment assembly includes a turntable, a driving source and a plurality of lenses, wherein the turntable is located above the lenses, a plurality of turntable through holes used in conjunction with the lenses are provided on the turntable surface, and the driving source is connected to the turntable;

[0008] The excitation light source and the detection component are respectively connected to different lens optical paths in the adjustment component;

[0009] In the adjustment assembly, the driving source drives the turntable to rotate to adjust the relative position of the turntable through hole and the lens, so that the lens is in a light-transmitting state or a light-blocking state.

[0010] Optionally, the adjustment assembly further includes a lens seat, the turntable is located above the lens seat, a top surface of the lens seat is provided with a plurality of lens seat through holes, and the lens is fixed in the lens seat through holes.

[0011] Optionally, the top surface of the lens seat is an inclined surface inclined outward and downward, and the lens seat through hole is located on the top surface of the lens seat.

[0012] Optionally, the lens seat through holes include a first type of lens seat through holes and a second type of lens seat through holes; the first type of lens seat through holes are used to connect the excitation light source with the test sample optical path; the second type of lens seat through holes are used to connect the test sample with the detection component optical path.

[0013] Optionally, the disk surface on the turntable is an inclined surface inclined outward and downward, and the turntable through hole is located on the top surface of the turntable.

[0014] Optionally, the turntable through holes include a first type of turntable through holes and a second type of turntable through holes;

[0015] The first type of turntable through hole matches with the first type of lens holder through hole: when the first type of turntable through hole and the first type of lens holder through hole are in a light-transmitting state, the second type of turntable through hole and the second type of lens holder through hole are staggered, so that the lens in the second type of lens holder through hole is in a light-blocking state;

[0016] The second type of turntable through hole cooperates with the second type of lens seat through hole: when the second type of turntable through hole and the second type of lens seat through hole are in a light-transmitting state, the first type of turntable through hole and the first type of lens seat through hole are staggered, so that the lens in the first type of lens seat through hole is in a light-blocking state.

[0017] Optionally, the number of the lens seat through holes is 3, namely the first lens seat through hole, the second lens seat through hole and the third lens seat through hole, and the angles between adjacent lens seat through holes are 120°; wherein the first lens seat through hole is a first type lens seat through hole, and the second lens seat through hole and the third lens seat through hole are both second type lens seat through holes; the number of the turntable through holes is 3, namely the first turntable through hole, the second turntable through hole and the third turntable through hole, and the angle between the first turntable through hole and the second turntable through hole is 180°, and the angle between the second turntable through hole and the third turntable through hole is 120°; wherein the first turntable through hole is a first type turntable through hole, and the second turntable through hole and the third turntable through hole are both second type turntable through holes; the angles between the lens seat through holes and the turntable through holes are all measured in the clockwise direction.

[0018] Optionally, the number of the lens seat through holes is 2, namely the first lens seat through hole and the second lens seat through hole, and the angle between the first lens seat through hole and the second lens seat through hole is 120°; wherein the first lens seat through hole is a first type lens seat through hole, and the second lens seat through hole is a second type lens seat through hole; the number of the turntable through holes is 2, namely the first turntable through hole and the second turntable through hole, and the angle between the first turntable through hole and the second turntable through hole is 180°, wherein the first turntable through hole is a first type turntable through hole, and the second turntable through hole is a second type turntable through hole; the angles between the lens seat through holes and the turntable through holes are all measured in the clockwise direction.

[0019] Optionally, the number of the lens seat through holes is 3, namely the first lens seat through hole, the second lens seat through hole and the third lens seat through hole, and the angles between adjacent lens seat through holes are 120°; wherein the first lens seat through hole is a first type lens seat through hole, and the second lens seat through hole and the third lens seat through hole are both second type lens seat through holes; the number of the turntable through holes is 2, namely the first turntable through hole and the second turntable through hole, and the angle between the first turntable through hole and the second turntable through hole is 180°, wherein the first turntable through hole is a first type turntable through hole, and the second turntable through hole is a second type turntable through hole; the angles between the lens seat through holes and the turntable through holes are all measured in the clockwise direction.

[0020] Optionally, a limiting component is provided on the turntable, and the limiting component includes a limiting groove and a limiting pin, the limiting pin is fixed relative to the lens, the limiting pin is inserted in the limiting groove, and the driving source drives the turntable to move along the limiting groove relative to the limiting pin.

[0021] Optionally, the limiting groove is an arc-shaped groove coaxial with the turntable, the upper end of the limiting pin is fixed on the outer seat, and the lower end of the limiting pin is inserted in the arc-shaped groove.

[0022] Optionally, the excitation light source includes a laser source, an optical fiber and a focusing straight tube, the laser emitted by the laser source is emitted into the optical fiber, the optical fiber is coupled to one end of the focusing straight tube through an optical fiber connector, and the focusing straight tube corresponds to the first lens in the through hole of the first type lens seat.

[0023] Optionally, the detection component includes a single-point tester and / or a multi-point tester.

[0024] Optionally, the detection assembly includes a photomultiplier tube and a fiber optic spectroscopy system; the photomultiplier tube corresponds to the second lens in the through hole of the second type lens seat, and the fiber optic spectroscopy system corresponds to the third lens in the through hole of the second type lens seat.

[0025] Optionally, the measuring device further comprises an outer base, the outer base is provided with a plurality of outer base through holes, and the excitation light source and the detection assembly are respectively fixed in the outer base through holes.

[0026] Optionally, the focusing straight tube, the photomultiplier tube and the optical fiber spectroscopy system are respectively located in different through holes of the outer base and correspond to different lenses respectively, and the unused through holes are blocked with through hole plugs.

[0027] Optionally, the adjustment assembly further includes a chassis, and the lens seat is mounted on the chassis.

[0028] Optionally, the temperature-changing component is connected to a chassis in the regulating component via a rotating disk.

[0029] The beneficial effects of this application include:

[0030] The device for measuring thermoluminescence characteristics provided in the present application can use a turntable to switch between light passing and light blocking in thermoluminescence characteristic measurement and variable temperature long afterglow attenuation characteristic test, which not only makes the excitation light path and the detection light path pass light at different times, thus avoiding the accumulation of sample light signals during the excitation process, which leads to a decrease in detection accuracy, but also avoids signal instability caused by the instantaneous on and off of high voltage when the photomultiplier tube is switched. At the same time, since the turntable can block light from the detection system during excitation, there is almost no background signal accumulation that cannot be deducted in the CCD of the fiber optic spectrometer, which improves the detection accuracy and sensitivity. Since signal fluctuations are avoided and the switching between the light passing and light blocking states is fast, the front end time detection limit of the attenuation characteristic curve of the long afterglow material can be as short as tens of milliseconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a device for measuring thermoluminescence properties in one embodiment of the present application;

[0032] Figure 2 A cross-sectional view of a device for measuring thermoluminescence properties in one embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the structure of a rotating disk in an adjustment assembly in one embodiment of the present application;

[0034] Figure 4 This is a schematic structural diagram of a lens holder in an adjustment assembly in one embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of a first limiting state of a limiting device in one embodiment of the present application;

[0036] Figure 6 This is a schematic diagram of a second limiting state of a limiting device in one embodiment of the present application;

[0037] Figure 7This is a schematic diagram of the structure of a rotating disk in an adjustment component in another embodiment of the present application;

[0038] Figure 8 It is a schematic structural diagram of a lens holder in an adjustment assembly in another embodiment of the present application.

[0039] List of parts and reference numerals:

[0040] 1PMT holder, 2PMT, 3 fiber connectors

[0041] 4 focusing cylinder, 5 motor, 6 motor seat,

[0042] 7 outer seat, 8 outer seat through hole, 9 bottom plate,

[0043] 10 transfer plate, 11 hot and cold stage, 12 transmission shaft,

[0044] 13 rotating disk, 14 lens seat, 15 lens seat through hole,

[0045] 16 a turntable through hole, 161 a first turntable through hole, 162 a second turntable through hole,

[0046] 163 third turntable through hole 17 motor seat assembly position, 18 motor shaft hole,

[0047] 19 transmission shaft hole, 20 lens, 21 lens seat blocking ring,

[0048] 22 limiting groove, 23 limiting pin. DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0050] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to 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 application.

[0051] 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 at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] A device for measuring variable-temperature long afterglow characteristics comprises an excitation light source, a variable temperature component, a detection component and an adjustment component; the variable temperature component is located below the adjustment component, and the excitation light source and the detection component are both located above the adjustment component; the adjustment component comprises a turntable, a driving source and a plurality of lenses, the turntable is located above the lenses, a plurality of turntable through holes used in conjunction with the lenses are provided on the turntable surface, and the driving source is connected to the turntable; the excitation light source and the detection component respectively correspond to different lenses in the adjustment component, that is, they are optically connected; in the adjustment component, the driving source drives the turntable to rotate to adjust the relative position of the turntable through holes and the lenses, so that the lenses are in a light-transmitting state or a light-blocking state.

[0056] Specifically, the device for measuring the variable temperature long afterglow characteristics includes a variable temperature component, an excitation light source, a detection component and an adjustment component. The variable temperature component is connected to a chassis in the adjustment component through an adapter plate. The chassis is located on the adapter plate, and the adapter plate is used to transfer the chassis and the variable temperature component. The sample is placed on or above the upper surface of the variable temperature component and fixed by a quartz clamp. The variable temperature component is preferably a hot and cold stage. When the sample is located on or above the upper surface of the variable temperature component, the excitation light source and the detection component are located above the sample at the same time. When the sample is located on or below the lower surface of the variable temperature component, the excitation light source and the detection component are located below the sample at the same time. The adjustment component is located between the excitation light source and the sample, and also between the detection component and the sample. The adjustment component includes a lens and a turntable. The lens is close to the sample. The turntable is located between the lens and the excitation light source, and also between the lens and the detection component. The turntable has several turntable through holes that rotate with the turntable and are consistent in size with the lens. The turntable through holes are close to the edge of the turntable. The driving source drives the turntable through holes to move along the circumference of the turntable, which can allow the lens to pass light or block light, so that the focusing straight tube (i.e., the excitation light source) and the detection component are not in the light-passing state at the same time.

[0057] The driving source is a motor, and the motor is located on a motor seat assembly position in the middle of the turntable through a motor seat.

[0058] Optionally, the adjustment assembly further includes a lens seat, the turntable is located above the lens seat, a top surface of the lens seat is provided with a plurality of lens seat through holes, and the lenses are fixed in the lens seat through holes.

[0059] Specifically, the lens is supported by a lens seat. An annular boss structure can be arranged in a through hole of the lens seat to support the lens. The through hole of the lens seat is close to the edge of the top surface of the lens seat.

[0060] Optionally, the top surface of the lens seat is an inclined surface inclined outward and downward, and the lens seat through hole is located on the top surface of the lens seat.

[0061] Optionally, the lens seat through hole includes a first type lens seat through hole and a second type lens seat through hole;

[0062] The first type of lens holder through hole is used to connect the excitation light source with the test sample optical path;

[0063] The second type lens holder through hole is used to connect the test sample with the optical path of the detection component.

[0064] In the present application, there is no strict limitation on the number and relative positions of the lens holder through holes, as long as they can achieve the effect of mutual cooperation with the turntable through holes.

[0065] Optionally, the number of the lens holder through holes is 3.

[0066] Specifically, in the present application, 2-3 lenses can be selected, located on the lens seat, preferably 3, respectively located at three equal positions of the lens seat. The number of lens seat through holes on the lens seat can be selected from 2 to 3, which are located on the lens seat for placing lenses, preferably 3.

[0067] Optionally, a through hole is left in the center of the lens seat and can be blocked by a lens seat blocking ring.

[0068] Optionally, there are three through holes in the lens seat, and the included angle between two adjacent through holes of the lens seat is 120°.

[0069] Optionally, the disk surface on the turntable is an inclined surface inclined outward and downward, and the turntable through hole is located on the top surface of the turntable.

[0070] Optionally, the turntable through holes include a first type of turntable through holes and a second type of turntable through holes;

[0071] The first type of turntable through hole matches with the first type of lens holder through hole: when the first type of turntable through hole and the first type of lens holder through hole are in the light-transmitting state, the second type of turntable through hole and the second type of lens holder through hole are staggered, so that the lens in the second type of lens holder through hole is in the light-blocking state, at this time, the excitation light path is connected and the test light path is blocked, which is the excitation state;

[0072] The second type of turntable through hole cooperates with the second type of lens seat through hole: when the second type of turntable through hole and the second type of lens seat through hole are in the light-transmitting state, the first type of turntable through hole and the first type of lens seat through hole are staggered, so that the lens in the first type of lens seat through hole is in the light-blocking state. At this time, the test light path is connected and the excitation light path is blocked, which is the test state.

[0073] In the present application, there is no strict limitation on the number and relative positions of the through holes of the turntable, as long as they can achieve the effect of mutual cooperation with the through holes of the lens holder.

[0074] Optionally, the number of the through holes of the turntable is 2-3.

[0075] Specifically, the turntable is driven by a motor to drive a transmission shaft to rotate, and there are turntable through holes on it. The turntable through holes can be 2-3, and the through holes are located on the turntable. By switching the positions of the through holes, the lens can be made to pass light or block light, so that the focusing straight tube and the detection component are not in the light-passing state at the same time.

[0076] In a specific example, the number of the lens seat through holes is 3, namely a first lens seat through hole, a second lens seat through hole and a third lens seat through hole, and the included angles of adjacent lens seat through holes are all 120°;

[0077] The first lens holder through hole is a first type lens holder through hole, and the second lens holder through hole and the third lens holder through hole are both second type lens holder through holes;

[0078] The number of the turntable through holes is 3, namely, a first turntable through hole, a second turntable through hole, and a third turntable through hole. The angle between the first turntable through hole and the second turntable through hole is 180°, and the angle between the second turntable through hole and the third turntable through hole is 120°;

[0079] The first turntable through hole is a first type turntable through hole, and the second turntable through hole and the third turntable through hole are both second type turntable through holes;

[0080] The angles between the lens seat through hole and the turntable through hole are all measured in the clockwise direction.

[0081] Specifically, there are three turntable through holes on the turntable, wherein the included angle between two adjacent turntable through holes (the first turntable through hole and the second turntable through hole) is 180°, and the included angle between the remaining turntable through hole (the third turntable through hole) and the second turntable through hole is 120°.

[0082] Two through holes of the turntable with an angle of 120° (the second through hole and the third through hole) are used to control the light-transmitting state of the lens corresponding to the detection component, and the other through hole of the turntable (the first through hole) is used to control the light-transmitting state of the lens corresponding to the excitation light source. Thus, the excitation light path and the detection light path are not simultaneously light-transmitting.

[0083] Specifically, for example, the second turntable through hole is used to control the light-passing or light-blocking state of the lens corresponding to the photomultiplier tube, the third turntable through hole is used to control the light-passing or light-blocking state of the lens corresponding to the fiber optic spectroscopy system, and the first turntable through hole is used to control the light-passing or light-blocking state of the lens corresponding to the focusing straight tube.

[0084] Optionally, a limiting component is provided on the turntable, the limiting component includes a limiting groove and a limiting pin, the limiting pin is fixed relative to the lens, the limiting pin is inserted in the limiting groove, and the driving source drives the turntable to move along the limiting groove relative to the limiting pin.

[0085] Specifically, the limit device on the turntable limits the limit position that the through hole of the turntable can reach by rotating. The limit device has a limit slot and a limit pin. The turntable is provided with a limit slot, and the outer seat is provided with a limit pin. The limit pin points from the outer seat to the limit slot on the turntable and is assembled in the limit slot so that the limit slot rotates around the limit pin.

[0086] The limit device can be set on the disk surface of the turntable, or can also be set on the side wall of the limit device. The two limit states can be switched by changing the hole position of the turntable through hole through the limit slot, so that the focusing straight tube and the detection component are not in the light-transmitting state at the same time. When a certain limit state is reached, the limit pin is used to stop the rotation.

[0087] Optionally, the limiting groove is an arc-shaped groove coaxial with the turntable, the upper end of the limiting pin is fixed on the outer seat, and the lower end of the limiting pin is inserted in the arc-shaped groove.

[0088] Specifically, the limiting groove is arranged on the disk surface of the turntable, and the arc angle of the arc-shaped groove, that is, the angle of rotation, is determined according to the limiting state, preferably 0° to 60°, and preferably rotates around a single limiting pin.

[0089] Optionally, the excitation light source includes a laser source, an optical fiber and a focusing straight tube. The laser emitted by the laser source is injected into the optical fiber. The optical fiber is coupled to one end of the focusing straight tube through an optical fiber connector. The focusing straight tube corresponds to the first lens in the through hole of the first type lens holder.

[0090] Specifically, the excitation light source is remotely introduced by an optical fiber and focused by a focusing straight tube.

[0091] Optionally, the detection component includes a single-point tester and / or a multi-point tester.

[0092] Specifically, the detection assembly includes a single-point detector and a multi-point detector, or one of the two, wherein the single-point detector is preferably a photomultiplier tube (PMT), and the multi-point detector is preferably a fiber optic spectroscopy system, wherein the PMT is supported by a PMT holder.

[0093] The detection component can be connected to an external control and data processing system to control the working status of each component of the device and perform data processing on the signal of the monitoring system, thereby realizing the measurement of thermoluminescence characteristics and the measurement of long afterglow decay characteristics under variable temperature conditions.

[0094] Optionally, the detection component includes a photomultiplier tube and a fiber optic spectroscopy system; the photomultiplier tube corresponds to the second lens, and the fiber optic spectroscopy system corresponds to the third lens.

[0095] Optionally, the measuring device further comprises an outer base, the outer base is provided with a plurality of outer base through holes, and the excitation light source and the detection assembly are respectively fixed in the outer base through holes.

[0096] Specifically, the outer seat through hole is close to the edge of the outer seat. If the outer seat through hole is not blocked by a through hole plug, the number of the outer seat through holes can be 2-3, and light can be transmitted to the lens through the turntable through hole.

[0097] Optionally, the number of the outer base through holes is 3, and the outer base through holes are evenly distributed on the outer base along the circumferential direction. The focusing straight tube, the photomultiplier tube and the optical fiber spectroscopy system are respectively located in different outer base through holes and correspond to different lenses respectively.

[0098] Specifically, the motor, the detection assembly, and the focusing straight tube are all located on the outer seat. The outer seat through hole is located at the position where the outer seat is divided into three equal parts, the motor is located at the center of the outer seat, the PMT, the optical fiber spectroscopy system, and the focusing straight tube are respectively located in the outer seat through hole of the outer seat, and the outer seat through hole is close to the edge of the outer seat. The outer seat through hole corresponds to the lens seat through hole one by one, wherein the outer seat through hole where the PMT and the optical fiber spectroscopy system are located corresponds to the second type lens seat through hole, and the focusing straight tube corresponds to the first type lens seat through hole.

[0099] Optionally, the adjustment assembly also includes a chassis, and the lens seat is installed on the chassis.

[0100] Optionally, the temperature-changing component is connected to a chassis in the regulating component via a rotating disk.

[0101] Specifically, after removing the various components above the lens holder blocking ring, the adapter plate is rotated and removed, and the sample can be placed on or removed from the temperature variable component.

[0102] When the turntable is in the first limit state, the excitation light path is connected and the detection light path is blocked; when the turntable is in the second limit state, the excitation light path is blocked and the detection light path is connected.

[0103] Specifically, under preferred conditions, when the first turntable through hole rotates to the position of the lens seat through hole (with the first lens disposed therein) corresponding to the focusing straight cylinder, it is limited by the limit groove and the limit pin. At this time, the focusing straight cylinder communicates with the first lens through the first turntable through hole, and the light beam emitted by the excitation light source can enter the device from the focusing straight cylinder and irradiate the sample. At this time, the optical fiber spectroscopy system and the PMT are in a light-blocking state due to the misalignment of the turntable through holes (i.e., the second turntable through hole and the third turntable through hole).

[0104] When the second turntable through hole and the third turntable through hole (the two through holes are located in the three-division position, and one of them is also located in the two-division position) rotate and reach the positions of the lens seat through hole (built-in second lens) corresponding to the PMT and the lens seat through hole (built-in third lens) corresponding to the optical fiber spectroscopy system respectively, they are limited by the limit groove and the limit pin. At this time, the PMT communicates with the second lens through the second turntable through hole, and the optical fiber spectroscopy system communicates with the third lens through the third turntable through hole. At this time, the light signal emitted by the sample can enter the PMT and the optical fiber spectroscopy system and be detected, and the focusing straight tube is in a light-blocking state due to the misalignment of the turntable through hole (i.e., the first turntable through hole). Since the detection system is blocked when the excitation light source is on, and the excitation light source is blocked when the detection system is on, the excitation light path and the detection light path are not on at the same time.

[0105] Example 1

[0106] Figure 1 A schematic diagram of the structure of a device for measuring thermoluminescence properties in an embodiment; Figure 2 is a cross-sectional view of a device for measuring thermoluminescence properties in this embodiment; Figure 3 is a schematic diagram of the structure of the rotating disk in the adjustment assembly in this embodiment; Figure 4 The structure diagram of the lens holder in the adjustment assembly in this embodiment is shown below. Figures 1 to 4 This embodiment is described in detail.

[0107] like Figures 1 to 4 As shown, the measuring device for variable temperature long afterglow characteristics provided in this embodiment includes a PMT seat 1, a PMT2, a fiber connector 3, a focusing straight tube 4, a motor 5, a motor seat 6, an outer seat 7 and an outer seat through hole 8, a chassis 9, an adapter plate 10, a hot and cold stage 11, a transmission shaft 12, a turntable 13 and a turntable through hole 16, a lens seat 14, a lens seat through hole 15 and a lens seat blocking ring 21, a lens 20, a limiting groove 22, a limiting pin 23, an excitation light source, a fiber optic spectroscopy system and a control and data processing system, wherein the fiber optic spectroscopy system can be connected to the outer seat through hole 8.

[0108] The hot and cold stage 11 is coupled with the measuring device component of the variable temperature long afterglow characteristics through the adapter plate 10. The chassis 9 in the adjustment assembly is located on the adapter plate 10. The lens seat 14 is assembled on the chassis 9. The side wall of the lens seat 14 is in contact with and fixed to the chassis 9. The three lenses 20 are respectively installed in the lens seat through holes 15 located on the top surface of the lens seat 14, and the lens seat center through hole is blocked with a lens seat blocking ring 21. The three lens seat through holes 15 are located at three equal positions on the lens seat 14. The turntable 13 is located above the lens seat 14, and has a turntable through hole 16 and a limit device. There are three turntable through holes 16 on the turntable 13, namely the first turntable through hole 161, the second turntable through hole 162 and the third turntable through hole 163, wherein the centers of the second turntable through hole 162 and the first turntable through hole 161 are at the position of bisection of the turntable 13, and the center of the third turntable through hole 163 is at the position of trisection of the contour line, that is, the angle between the first turntable through hole 161 and the second turntable through hole 162 is 180°, and the angle between the second turntable through hole 162 and the third turntable through hole 163 is 120°. The limiting device on the turntable 13 limits the extreme position that the turntable through hole 16 can reach by rotating. The limiting device includes a limiting groove 22 and a limiting pin 23. The two limiting states can be switched by changing the hole position of the turntable through hole 16 through the limiting device and the turntable 13 (see Example 2 for details), so that the optical fiber spectroscopy system and the PMT2 are not in the light-transmitting state at the same time as the focusing straight tube 4. When the predetermined limiting state is reached, the limiting pin 23 stops the rotation, and the rotation angle is 0° to 60°, and the rotation is centered on the single limiting pin 23. The outer seat 7 is located above the turntable 13, and the three outer seat through holes 8 correspond to the lens seat through holes 15 one by one, and are located at the three-divided position. The motor 5, the detection system, and the focusing straight tube 4 are all located on the outer seat 8, wherein the motor 5 is located at the center of the outer seat 7, and the PMT seat 1, the optical fiber spectroscopy system and the focusing straight tube 4 are respectively located in the outer seat through holes 8 at the three-divided positions of the outer seat 7. For example, the optical fiber spectroscopy system can be connected to the outer seat through hole 8 through another focusing straight tube and optical fiber different from the focusing straight tube 4 connected to the excitation light source. PMT2 is assembled in the PMT seat 1. The motor 5 is mounted on the motor seat assembly position 17 of the turntable 13 through the motor seat 6. The focusing straight tube 4 is connected to the optical fiber through the optical fiber connector 3, and is connected to the excitation light source through the optical fiber.

[0109] When the second turntable through hole 162 at the bisection position is in a through state with the outer seat through hole 8 at the trisection position, the third turntable through hole 163 is also in a through state with the outer seat through hole 8, and the outer seat through hole 8 where the focusing straight tube 4 is located is staggered with the first turntable through hole 161 (this is the detection state, that is, two turntable through holes are connected with the detection component, and the remaining turntable through hole is staggered with the focusing straight tube). The motor 5 is assembled on the motor base 6 and connected to the transmission shaft 12, and the turntable 13 is connected to the motor shaft hole 18 through the transmission shaft hole 19 that passes through the outer base 7 and drives the turntable 13 to rotate. The control and data processing system can communicate with the PMT2 or the fiber optic spectroscopy system.

[0110] Example 2

[0111] like Figure 5 As shown, when the limit device is in the first limit state, the first turntable through hole 161 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, the focusing straight tube 4 is in a light-transmitting state, and the light beam emitted by the excitation light source can enter the device from the focusing straight tube 4 and irradiate the sample. At this time, the PMT2 and the optical fiber spectroscopy system are in a light-blocking state due to the misalignment of the second turntable through hole 162 and the third turntable through hole 163.

[0112] When the limit device is in the second limit state ( Figures 5 and 6 In the figure, when the first limit state is changed to the second limit state, the turntable is rotated counterclockwise), at this time, the second turntable through hole 162 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, and the third turntable through hole 163 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, PMT2 and the optical fiber spectroscopy system are in a light-transmitting state, and the optical signal emitted by the sample can enter PMT2 and the optical fiber spectroscopy system and be detected, while the focusing straight tube 4 is in a light-blocking state due to the misalignment of the first turntable through hole 161.

[0113] Example 3

[0114] The measuring method of the variable temperature long afterglow attenuation characteristics of the variable temperature long afterglow characteristics is as follows:

[0115] Place the sample on the hot and cold stage 11 and assemble the thermoluminescence property test device. The components above the adapter plate 10 can be separated and assembled as a whole. Turn on the PMT2 and the fiber optic spectroscopy system.

[0116] The motor is activated by the control and data processing system to drive the turntable 13 to rotate to a first limit state, and then the hot and cold stage 11 is driven to change the temperature of the sample to a predetermined value.

[0117] Turn on the excitation light source, and the light beam is introduced into the focusing tube 4 through the optical fiber 3 and then irradiates the sample through the lens 20. After 10 seconds, the motor 5 drives the turntable 13 to rotate so that it is in the second limit state. It takes 50ms to rotate from the first limit state to the second limit state, and the reverse rotation takes the same time. The afterglow signal emitted by the sample enters the PMT2 and the optical fiber spectroscopy system through the lens 20, and the attenuation curve of the sample's afterglow changing with time can be obtained.

[0118] Example 4

[0119] Figure 7 is a schematic diagram of the structure of the rotating disk in the adjustment assembly in this embodiment; Figure 8 The structure diagram of the lens holder in the adjustment assembly in this embodiment is shown below. Figures 7 to 8 This embodiment is described in detail.

[0120] like Figure 7 , Figure 8 ,as well as Figure 1 and Figure 2 As shown, the measuring device for variable temperature long afterglow characteristics provided in this embodiment includes a PMT seat 1, a PMT 2, an optical fiber connector 3, a focusing straight tube 4, a motor 5, a motor seat 6, an outer seat 7 and an outer seat through hole 8, a chassis 9, an adapter plate 10, a hot and cold stage 11, a transmission shaft 12, a turntable 13 and a turntable through hole 16, a lens seat 14, a lens seat through hole 15 and a lens seat blocking ring 21, a lens 20, a limiting groove 22, a limiting pin 23, an excitation light source and a control and data processing system.

[0121] The hot and cold stage 11 is coupled to the variable temperature long afterglow characteristic measuring device component through the adapter plate 10. The chassis 9 in the adjustment assembly is located on the adapter plate 10. The lens holder 14 is assembled on the chassis 9. The side wall of the lens holder 14 is in contact with and fixed to the chassis 9. Figure 8 As shown, two lenses 20 are respectively installed in two lens seat through holes 15 located on the top surface of the lens seat 14, and the central through hole of the lens seat is blocked by a lens seat blocking ring 21. The two lens seat through holes 15 are located at two trisection positions on the lens seat 14 (the included angle is 120°). The turntable 13 is located above the lens seat 14, and has a turntable through hole 16 and a limit device. Figure 7 As shown, there are two turntable through holes 16 on the turntable 13, namely the first turntable through hole 161 and the second turntable through hole 162, and their centers are at the bisection position of the turntable 13, that is, the angle between the first turntable through hole 161 and the second turntable through hole 162 is 180°. The limit device on the turntable 13 limits the limit position that the turntable through hole 16 can reach by rotating. The limit device includes a limit groove 22 and a limit pin 23. The two limit states can be switched by changing the hole position of the turntable through hole 16 by the limit device and the turntable 13 (see embodiment 6 for details), so that the PMT2 and the focusing straight tube 4 are not in the light-transmitting state at the same time. When the predetermined limit state is reached, the limit pin 23 stops the rotation, and the rotation angle is 0° to 60°, and the rotation is centered on the single limit pin 23. The outer seat 7 is located above the turntable 13, and the two outer seat through holes 8 correspond to the lens seat through holes 15 one by one, and are located at two trisection positions. The motor 5, the detection system, and the focusing cylinder 4 are all located on the outer seat 8, wherein the motor 5 is located at the center of the outer seat 7, and the PMT seat 1 and the focusing cylinder 4 are respectively located in the outer seat through hole 8 at the third position of the outer seat 7. The PMT 2 is assembled in the PMT seat 1. The motor 5 is mounted on the motor seat assembly position 17 of the turntable 13 through the motor seat 6.

[0122] When the second turntable through hole 162 at the bisection position is in a through state with the outer seat through hole 8 at the trisection position (the second turntable through hole 162 is in communication with the lens 20, and the first turntable through hole 161 is offset from the lens 20), the outer seat through hole 8 where the focusing straight tube 4 is located is offset from the first turntable through hole 161 (this is the detection state, that is, one turntable through hole is in communication with the detection component, and the remaining turntable through hole is offset from the focusing straight tube). The motor 5 is assembled on the motor seat 6 and connected to the transmission shaft 12, and the turntable 13 is connected to the motor shaft hole 18 through the transmission shaft hole 19 that passes through the outer seat 7 and drives the turntable 13 to rotate. The control and data processing system can communicate with the PMT2.

[0123] Example 5

[0124] When the limit device is in the first limit state, the first turntable through hole 161 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, the focusing straight tube 4 is in a light-transmitting state, and the light beam emitted by the excitation light source can enter the device from the focusing straight tube 4 and irradiate the sample. At this time, PMT2 is in a light-blocking state due to the misalignment of the second turntable through hole 162.

[0125] When the limit device is in the second limit state (when changing from the first limit state to the second limit state, the turntable rotates counterclockwise), the second turntable through hole 162 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, and PMT2 is in a light-transmitting state. The light signal emitted by the sample can enter PMT2 and be detected, while the focusing straight tube 4 is in a light-blocking state due to the misalignment of the first turntable through hole 161.

[0126] Example 6

[0127] The measuring method of the variable temperature long afterglow attenuation characteristics of the variable temperature long afterglow characteristics is as follows:

[0128] Place the sample on the hot and cold stage 11 and assemble the thermoluminescence characteristic test device. The components above the adapter plate 10 can be separated and assembled as a whole. Turn on PMT2.

[0129] The motor is activated by the control and data processing system to drive the turntable 13 to rotate to a first limit state, and then the hot and cold stage 11 is driven to change the temperature of the sample to a predetermined value.

[0130] Turn on the excitation light source, and the light beam is introduced into the focusing tube 4 through the optical fiber 3 and then irradiates the sample through the lens 20. After 10 seconds, the motor 5 drives the turntable 13 to rotate so that it is in the second limit state. It takes 50ms to rotate from the first limit state to the second limit state, and the reverse rotation takes the same time. The afterglow signal emitted by the sample enters the PMT2 through the lens 20, and the decay curve of the afterglow of the sample over time can be obtained.

[0131] Example 7

[0132] Using the assembly described in Example 1, Figure 1 , Figure 2 and Figure 4 As shown, the turntable in this embodiment is Figure 7 At this time, the three lens holder through holes 15 are located at the upper three trisection positions on the lens holder (such as Figure 4 As shown). The turntable 13 is located above the lens holder 14, and has a turntable through hole 16 and a stopper. Figure 7 As shown, there are two turntable through holes 16 on the turntable 13, namely the first turntable through hole 161 and the second turntable through hole 162, and their centers are at the bisection position of the turntable 13, that is, the angle between the first turntable through hole 161 and the second turntable through hole 162 is 180°. The limit device on the turntable 13 limits the limit position that the turntable through hole 16 can reach by rotating. The limit device includes a limit groove 22 and a limit pin 23. The two limit states can be switched by changing the hole position of the turntable through hole 16 by the limit device and the turntable 13 (see Example 8 for details), so that the PMT2, the focusing straight tube 4 and the optical fiber spectroscopy system are not in the light-transmitting state at the same time. When the predetermined limit state is reached, the limit pin 23 stops the rotation, and the rotation angle is 0° to 60°, and the rotation is centered on the single limit pin 23. The outer seat 7 is located above the turntable 13, and the three outer seat through holes 8 correspond to the lens seat through holes 15 one by one, and are located at three trisection positions. The motor 5, the detection system, and the focusing cylinder 4 are all located on the outer seat 8, wherein the motor 5 is located at the center of the outer seat 7, and the PMT seat 1, the fiber spectroscopy system, and the focusing cylinder 4 are respectively located in the outer seat through hole 8 at the trisection position of the outer seat 7. For example, the fiber spectroscopy system can be connected to the outer seat through hole 8 through another focusing cylinder 4 and an optical fiber different from the focusing cylinder 4 connected to the excitation light source. The PMT 2 is assembled in the PMT seat 1. The motor 5 is mounted on the motor seat assembly position 17 of the turntable 13 through the motor seat 6. The focusing cylinder 4 is connected to the optical fiber through the optical fiber connector 3, and is connected to the excitation light source through the optical fiber.

[0133] When the turntable through hole 162 at the bisection position is in a through state with the outer seat through hole 8 at the trisection position, the outer seat through hole 8 where the focusing straight tube 4 is located is staggered with the first turntable through hole 161 (this is the detection state, that is, one turntable through hole is connected with the detection component, and the remaining turntable through hole is staggered with the focusing straight tube). The motor 5 is assembled on the motor base 6 and connected to the transmission shaft 12, and the turntable 13 is connected to the motor shaft hole 18 through the transmission shaft hole 19 that passes through the outer base 7 and drives the turntable 13 to rotate. The control and data processing system can communicate with the PMT2 or the fiber optic spectroscopy system.

[0134] Example 8

[0135] When the limit device is in the first limit state, the first turntable through hole 161 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, the focusing straight tube 4 is in a light-transmitting state, and the light beam emitted by the excitation light source can enter the device from the focusing straight tube 4 and irradiate the sample. At this time, the PMT2 or the optical fiber spectroscopy system is in a light-blocking state due to the misalignment of the second turntable through hole 162.

[0136] When the limit device is in the second limit state (when changing from the first limit state to the second limit state, the turntable is rotated counterclockwise or clockwise), the second turntable through hole 162 is connected with the corresponding lens seat through hole 15 and the outer seat through hole 8, and the PMT2 or the optical fiber spectroscopy system is in a light-transmitting state. The light signal emitted by the sample can enter the PMT2 and be detected, while the focusing straight tube 4 is in a light-blocking state due to the misalignment of the first turntable through hole 161.

[0137] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A device for measuring variable temperature long afterglow characteristics, characterized in that: The measuring device comprises an excitation light source, a temperature-changing component, a detection component and an adjustment component; The temperature-changing component is located below the adjusting component, and the excitation light source and the detection component are both located above the adjusting component; The adjustment assembly includes a turntable, a driving source and a plurality of lenses, wherein the turntable is located above the lenses, a plurality of turntable through holes used in conjunction with the lenses are provided on the turntable surface, and the driving source is connected to the turntable; The excitation light source and the detection component are respectively connected to different lens optical paths in the adjustment component; In the adjustment assembly, the driving source drives the turntable to rotate to adjust the relative position of the turntable through hole and the lens, so that the lens is in a light-transmitting state or a light-blocking state; The measuring device further comprises an outer base, a plurality of outer base through holes are arranged on the outer base, and the excitation light source and the detection assembly are respectively fixed in the outer base through holes.

2. The measuring device according to claim 1, characterized in that The adjustment assembly also includes a lens seat. The turntable is located above the lens seat. The top surface of the lens seat is provided with a plurality of lens seat through holes. The lenses are fixed in the lens seat through holes.

3. The measuring device according to claim 2, characterized in that The lens seat through hole is located on the top surface of the lens seat.

4. The measuring device according to claim 2, characterized in that The turntable through hole is located on the top surface of the turntable.

5. The measuring device according to claim 2, characterized in that The lens seat through holes include a first type of lens seat through holes and a second type of lens seat through holes; The first type of lens holder through hole is used to connect the excitation light source with the test sample optical path; The second type lens holder through hole is used to connect the test sample with the optical path of the detection component.

6. The measuring device according to claim 5, characterized in that The turntable through holes include a first type of turntable through holes and a second type of turntable through holes; The first type of turntable through hole matches with the first type of lens holder through hole: when the first type of turntable through hole and the first type of lens holder through hole are in a light-transmitting state, the second type of turntable through hole and the second type of lens holder through hole are staggered, so that the lens in the second type of lens holder through hole is in a light-blocking state; The second type of turntable through hole cooperates with the second type of lens seat through hole: when the second type of turntable through hole and the second type of lens seat through hole are in a light-transmitting state, the first type of turntable through hole and the first type of lens seat through hole are staggered, so that the lens in the first type of lens seat through hole is in a light-blocking state.

7. The measuring device according to claim 6, characterized in that The number of the lens seat through holes is 3, namely, a first lens seat through hole, a second lens seat through hole and a third lens seat through hole, and the included angles of adjacent lens seat through holes are all 120°; The first lens holder through hole is a first type lens holder through hole, and the second lens holder through hole and the third lens holder through hole are both second type lens holder through holes; The number of the turntable through holes is 3, namely, a first turntable through hole, a second turntable through hole, and a third turntable through hole. The angle between the first turntable through hole and the second turntable through hole is 180°, and the angle between the second turntable through hole and the third turntable through hole is 120°; The first turntable through hole is a first type turntable through hole, and the second turntable through hole and the third turntable through hole are both second type turntable through holes; The angles between the lens seat through hole and the turntable through hole are all measured in the clockwise direction.

8. The measuring device according to claim 6, characterized in that The number of the lens seat through holes is 2, namely a first lens seat through hole and a second lens seat through hole, and the angle between the first lens seat through hole and the second lens seat through hole is 120°; The first lens holder through hole is a first type lens holder through hole, and the second lens holder through hole is a second type lens holder through hole; The number of the through holes of the rotating disk is 2, namely the first through hole of the rotating disk and the second through hole of the rotating disk, and the angle between the first through hole of the rotating disk and the second through hole of the rotating disk is 180° Wherein, the first turntable through hole is a first type turntable through hole, and the second turntable through hole is a second type turntable through hole; The angles between the lens seat through hole and the turntable through hole are all measured in the clockwise direction.

9. The measuring device according to claim 6, characterized in that The number of the lens seat through holes is 3, namely, a first lens seat through hole, a second lens seat through hole and a third lens seat through hole, and the included angles of adjacent lens seat through holes are all 120°; The first lens holder through hole is a first type lens holder through hole, and the second lens holder through hole and the third lens holder through hole are both second type lens holder through holes; The number of the turntable through holes is 2, namely a first turntable through hole and a second turntable through hole, and the angle between the first turntable through hole and the second turntable through hole is 180°; Wherein, the first turntable through hole is a first type turntable through hole, and the second turntable through hole is a second type turntable through hole; The angles between the lens seat through hole and the turntable through hole are all measured in the clockwise direction.

10. The measuring device according to claim 1, characterized in that The turntable is provided with a limiting component, which includes a limiting groove and a limiting pin. The limiting pin is fixed relative to the lens seat, and the limiting pin is inserted in the limiting groove. The driving source drives the turntable to move along the limiting groove relative to the limiting pin.

11. The measuring device according to claim 10, characterized in that The limiting groove is an arc-shaped groove coaxial with the rotating disk, the upper end of the limiting pin is fixed on the outer seat, and the lower end of the limiting pin is inserted in the arc-shaped groove.

12. The measuring device according to claim 1, characterized in that The excitation light source includes a laser source, an optical fiber and a focusing straight tube. The optical fiber is coupled to one end of the focusing straight tube through an optical fiber connector. The focusing straight tube corresponds to the first lens in the through hole of the first type lens seat.

13. The measuring device according to claim 12, characterized in that The detection component includes a single-point tester and / or a multi-point tester.

14. The measuring device according to claim 12, characterized in that The detection assembly includes a photomultiplier tube and an optical fiber spectroscopy system; the photomultiplier tube corresponds to the second lens in the through hole of the second type lens seat, and the optical fiber spectroscopy system corresponds to the third lens in the through hole of the second type lens seat.

15. The measuring device according to claim 2, characterized in that The focusing straight tube, the photomultiplier tube and the optical fiber spectrum system are respectively located in different through holes of the outer seat and correspond to different lenses respectively, and the unused through holes are blocked with through hole plugs.

16. The measuring device according to claim 15, characterized in that The adjustment assembly also includes a chassis, and the lens seat is installed on the chassis.

17. The measuring device according to claim 15, characterized in that The temperature-changing component is connected to the bottom plate in the regulating component through a rotating disk.

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