WO2020029320A1 - 自动修正闪烁探测器辐射探测效率的测量装置 - Google Patents

自动修正闪烁探测器辐射探测效率的测量装置 Download PDF

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Publication number
WO2020029320A1
WO2020029320A1 PCT/CN2018/101307 CN2018101307W WO2020029320A1 WO 2020029320 A1 WO2020029320 A1 WO 2020029320A1 CN 2018101307 W CN2018101307 W CN 2018101307W WO 2020029320 A1 WO2020029320 A1 WO 2020029320A1
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Prior art keywords
detector
detection efficiency
control board
opening
radiation detection
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PCT/CN2018/101307
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English (en)
French (fr)
Inventor
谭忠强
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苏州速核仪器有限公司
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Publication of WO2020029320A1 publication Critical patent/WO2020029320A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G01T7/005—Details of radiation-measuring instruments calibration techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/20—Measuring radiation intensity with scintillation detectors

Definitions

  • the utility model relates to nuclear radiation detection, in particular to a measuring device for automatically correcting radiation detection efficiency of a scintillation detector.
  • the nuclear radiation scintillation detector (shown in Figure 1) is mainly composed of a scintillator, a photomultiplier tube, a high-voltage power supply, and an op amp circuit; the measurement principle is that after the gamma rays enter the scintillator detector, particles and the scintillator interact to produce a weak The light is then amplified by the photomultiplier tube to generate an electrical signal, and the weak electrical signal of the photomultiplier tube is further amplified by an op amp circuit to obtain a detectable voltage pulse signal.
  • the commonly used method is to determine the efficiency change of the scintillation detector by detecting the number of signal pulses obtained when the radiation source of the same known activity is used. Before the device leaves the factory, a calibration source is used and then the high voltage or operational amplifier is adjusted to make the detector The number of signal pulses at the best detection efficiency; when the high voltage changes, or the detector ages, or the temperature changes after leaving the factory, the detector will deviate from the optimal detection efficiency. At this time, it needs to be readjusted to return the detector to the optimal Detect efficiency status.
  • the current adjustment method requires personnel to bring the calibration source to the equipment site, perform multiple measurements according to the method before leaving the factory, and then manually adjust the high-voltage or op amp circuit gain to return the detector to the best detection efficiency state; this method requires professional Technical personnel can only operate when they arrive at the equipment site. Since the equipment is installed in all parts of the country after leaving the factory, the cycle and cost of on-site adjustment operations are very high, so it is necessary to use a device that can remotely adjust automatically.
  • the purpose of the present invention is to provide a measuring device that automatically corrects the radiation detection efficiency of the scintillation detector.
  • the utility model is cleverly designed to realize the automatic correction adjustment of the radiation detection efficiency of the scintillation detector and save the cost of manual adjustment. .
  • the utility model provides a measuring device for automatically correcting the radiation detection efficiency of a scintillation detector, including a calibration source containing a trace of long half-life natural radioactivity, a shielding case, a driving device, a connecting bracket, and a control board.
  • the shielding case covers the calibration source; the shielding case is provided with an opening for the calibration source to emit; the driving device and the shielding case
  • the connection bracket mounts the shielding case on the detector; the control board is electrically connected to the driving device; the control board controls the driving device to make the shielding case open
  • the mouth is facing or facing away from the detector, and is turned on or off; the control board is also connected to the high voltage circuit and the operational amplifier circuit in the detector; the control board adjusts the gain parameters of the high voltage circuit and the operational amplifier circuit.
  • a shielding layer made of a nuclear radiation-proof material is further installed on the inner wall of the connection bracket.
  • the driving device is a rotary electric machine; the rotary electric machine is mounted on the connection bracket through a bearing; the rotary electric machine is connected to the shield housing; the shield housing is a rotating member; and the rotary electric machine is driven
  • the shielding case is rotated so that the opening is directly facing or facing away from the detector.
  • a limit switch is further included, the limit switch detects a rotation angle of the rotary electric machine, and the limit switch is used for positioning the open position.
  • the driving device is a rotary stepper motor controlled by codes, and the rotary stepper motor is mounted on the connection bracket through a bearing; the rotary stepper motor is connected to the shield case; the shield case It is a rotating part; the rotary stepping motor drives the shielding shell to rotate so that the opening is directly facing or facing away from the detector.
  • the driving device is a power execution device installed on the opening and used to open or close the opening.
  • the control board is connected to the detector through the transmission module;
  • the transmission module includes a wireless transmission module: a WIFI module or a Bluetooth module or a ZigBee module and a wired transmission module: a network module or a CAN bus module Or 485 bus module.
  • control board communicates with a mobile terminal through the WIFI module or the Bluetooth module.
  • the utility model provides a measuring device for automatically correcting the radiation detection efficiency of a scintillation detector.
  • the utility model includes a calibration source containing a trace amount of long half-life natural radioactivity, a shielding case, a driving device, a connection bracket and a control board.
  • the shielding case is made of anti-nuclear radiation material.
  • the shielding case covers the verification source; the shielding case is provided with an opening for the verification source to radiate; the driving device is connected to the shielding case; the connection bracket installs the shielding case on the detector;
  • the control board is electrically connected with the driving device; the control board controls the driving device so that the opening on the shield case faces or faces the detector, opens or closes; the control board is also connected to the high-voltage circuit and the op amp circuit in the detector ;
  • the control board adjusts the gain parameters of the high-voltage circuit and the op amp circuit.
  • FIG. 1 is a schematic diagram of a modular structure of a measuring device for automatically correcting a radiation detection efficiency of a scintillation detector according to the present invention
  • FIG. 2 is a schematic structural diagram of a measuring device for automatically correcting a radiation detection efficiency of a scintillation detector in Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a working principle of a measuring device for automatically correcting a radiation detection efficiency of a scintillation detector in an embodiment of the present invention.
  • connection bracket 1 the verification source 2
  • the shield case 30 the opening 31, the shield layer 32
  • the detector 4 the rotary motor 5
  • the limit switch 6 the limit switch 6.
  • a measuring device for automatically correcting the radiation detection efficiency of a scintillation detector includes a calibration source 2 containing a trace amount of long half-life natural radioactivity 2, a shielding case 30, a driving device, a connection bracket 1, and a control board.
  • the shielding case 30 is made of a nuclear radiation-proof material, and the shielding case 30 covers the calibration source 2.
  • the shielding case 30 is provided with an opening 31 for the calibration source 2 to emit.
  • the driving device is connected with the shielding case 30; the connection bracket 1 mounts the shielding case 30 on the detector 4; the control board is electrically connected with the driving device; the control board Controlling the driving device to open or close the opening 31 on the shielding housing 30 directly or back to the detector 4; the control board is also connected to the high voltage circuit and the op amp circuit in the detector 4; The control board adjusts gain parameters of the high-voltage circuit and the operational amplifier circuit.
  • the calibration source 2 is completely covered with anti-nuclear radiation when the calibration source 2 is not used, that is, the storage location, as shown in FIG. 2 It is shown that a shielding layer 32 made of an anti-nuclear radiation material is also installed on the inner wall of the connection bracket 1.
  • the driving device is a rotary electric machine 5; the rotary electric machine 5 is mounted on the connection bracket 1 through a bearing; the rotary electric machine 5 is connected to the shield housing 30; and the shield
  • the casing 30 is a rotating part; the rotating motor 5 drives the shielding casing 30 to rotate so that the opening 31 faces or faces the detector 4.
  • a limit switch 6 is further included.
  • the limit switch 6 detects a rotation angle of the rotary electric machine 5, and the limit switch 6 is used for positioning the position of the opening 31.
  • the first is a single gear setting. Two limit switches 6 are evenly arranged in a range of 360 °.
  • the rotary motor 5 is provided with a trigger gear.
  • the port 31 is facing the detector 4, and the detector 4 is corrected by the calibration source 2. After the correction is completed, the rotary motor 5 rotates 180 ° in the reverse direction of the original rotation direction. Another trigger position triggers the limit switch 6 and the rotary motor 5 Stop, at this time the opening 31 faces away from the detector 4.
  • the driving device is a rotary stepper motor controlled by codes, and the rotary stepper motor is mounted on the connection bracket 1 through a bearing; the rotary stepper motor is connected to the shield case 30;
  • the shielding case 30 is a rotating part; the rotary stepping motor drives the shielding case 30 to rotate so that the opening 31 faces or faces the detector 4.
  • the rotary stepper motor is controlled by a code and is configured to rotate only 180 ° each time, the control board is triggered each time, and the rotary stepper motor rotates only half a turn to ensure that the opening 31 is facing or facing the detector 4.
  • the driving device is a power executing device installed on the opening 31 and used to open or close the opening 31.
  • the driving device is configured to open or close the power execution device of the opening 31, such as a movable or rotatable opening made of nuclear radiation-proof material attached to the inner wall or the outer wall.
  • the calibration source 2 radiates the detector 4 and the detector 4 uses the calibration source 2 for correction. After the correction is completed, the opening is closed.
  • the control board is connected to the detector 4 through the transmission module; the transmission module includes a wireless transmission module: a WIFI module or a Bluetooth module or a ZigBee module and a wired transmission module: a network module or a CAN bus Module or 485 bus module.
  • the control board is connected to and communicates with a mobile terminal through the WIFI module or the Bluetooth module.
  • the control board can be configured to perform automatic timing or fixed-time correction or accept only correction instructions in two ways. The first is automatic timing or fixed-time correction, that is, writing a timing or counting program in the control board, where The automatic timing correction is to record the time of the last correction and count down.
  • the automatic correction is to record the allowable number of uses of the detector 4 after the last correction, and the number of times for each use is reduced until After the usage is allowed to be zero, automatic correction will be performed; the second is to use the mobile terminal to interact with the control board to establish communication with the mobile terminal through the WIFI module or Bluetooth module. The user can send a correction command to the control board to make corrections. .
  • the following also provides the working principle of a measurement device for automatically correcting the radiation detection efficiency of a scintillation detector in an embodiment of the present invention, as shown in FIG. 3, including the following steps:
  • the verification unit sends a correction instruction to the control board, and the control board starts the correction adjustment after receiving the instruction;
  • control board collects the number of signal pulses of the detector 4, for example, acquires the measurement signal frequency for 30 seconds;
  • step S23 Determine whether the frequency of the measurement signal exceeds the pulse frequency threshold. If the frequency exceeds the threshold, go to step S24; if it does not, then no correction is required.
  • the control board rotating motor 5 turns the opening 31 away from the detector 4 until the limit switch 6 gives a signal that the rotating motor 5 stops rotating, and the opening 31 faces away from the detector 4;
  • step S24 Determine whether the voltage of the detection high-voltage circuit is consistent with that at the factory. If the voltage is the same, go to step S25; if not, the control board adjusts the gain parameter of the high-voltage transport circuit to make the voltage value of the high-voltage circuit close to the factory value; The gain parameters of the high-voltage transport circuit can be adjusted through the voltage regulation program integrated on the control board.
  • the signal is measured again, and the control board collects the number of signal pulses of the scintillation detector, and acquires a new measurement signal frequency for 30 seconds.
  • S26 Determine whether the frequency of the new measurement signal exceeds the pulse frequency threshold. If it exceeds, the controller adjusts the gain parameter of the op amp circuit until the gain parameter of the op amp circuit is close to the factory value; if it does not exceed, the correction is completed and the control board rotates.
  • the motor 5 turns the opening 31 away from the detector 4 until the limit switch 6 gives a signal to the rotary motor 5 to stop rotating, and the opening 31 faces away from the detector 4.
  • the gain parameter of the op amp circuit can be adjusted by a digital potentiometer integrated on the control board.
  • the method further includes: establishing wireless communication, establishing a control board to communicate with the mobile terminal through a WIFI module or a Bluetooth module, and the verification unit is a timing trigger program or an interactive trigger program built into the mobile terminal.
  • the verification unit can be configured to perform automatic timing or fixed-time correction or accept only correction instructions in two ways. The first is automatic timing or fixed-time correction, that is, the control unit uses the timing or The counting program is written, in which the automatic timing correction is to record the time of the last correction and count down. When the time is zero, the automatic correction is to record the allowable number of uses of the detector 4 after the last correction.
  • the second is to use a mobile terminal for interaction
  • the verification unit is an interactive program for the mobile terminal.
  • the WIFI module or Bluetooth module is used to establish a connection between the control board and the mobile terminal. Communication, users can send correction instructions to control the control panel to make corrections through the mobile terminal.
  • a measurement device that can automatically correct the radiation detection efficiency of the scintillation detector is connected to the cloud, real-time communication during the adjustment process, and provide a basis for remote adjustment .
  • the above working principle does not make any improvement to the method of using the measuring device for automatically correcting the radiation detection efficiency of the scintillation detector of the present invention, but only on the structure of the measuring device for automatically correcting the radiation detection efficiency of the scintillation detector disclosed by the present invention.
  • the utility model provides a measuring device for automatically correcting the radiation detection efficiency of a scintillation detector.
  • the utility model includes a calibration source containing a trace amount of long half-life natural radioactivity, a shielding case, a driving device, a connection bracket and a control board.
  • the shielding case is made of anti-nuclear radiation material
  • the shielding case covers the verification source; the shielding case is provided with an opening for the verification source to emit; the driving device is connected to the shielding case; the connection bracket installs the shielding case on the detector; the control board and The driving device is electrically connected; the control board controls the driving device so that the opening on the shielding case faces or faces the detector, opens or closes; the control board is also connected to the high voltage circuit and the op amp circuit in the detector; the control board adjusts Gain parameters for high voltage circuits and op amp circuits.
  • the utility model has a reasonable structure and an ingenious design, and realizes automatic correction and adjustment of the radiation detection efficiency of the scintillation detector, thereby saving the cost of manual adjustment.

Abstract

自动修正闪烁探测器辐射探测效率的测量装置，包括内含微量长半衰期天然放射性的校验源(2)、屏蔽壳体(30)、驱动装置、连接支架(1)、控制板，屏蔽壳体(30)由防核辐射材料制成，其特征在于：屏蔽壳体(30)包覆校验源(2)；屏蔽壳体(30)上设有一供校验源(2)放射的敞口(31)；驱动装置与屏蔽壳体(30)连接；连接支架(1)将屏蔽壳体(30)安装于探测器上；控制板与驱动装置电性连接；控制板控制驱动装置使屏蔽壳体(30)上的敞口(31)正对或背对探测器(4)、开启或关闭；控制板还与探测器(4)内的高压电路与运放电路连接；控制板调节高压电路与运放电路的增益参数。

Description

自动修正闪烁探测器辐射探测效率的测量装置 技术领域
本实用新型涉及核辐射检测，尤其涉及自动修正闪烁探测器辐射探测效率的测量装置。
背景技术
核辐射的闪烁探测器(图1所示)主要由闪烁体、光电倍增管、高压电源、运放电路组成；测量原理为伽玛射线进入闪烁体探测器后，粒子与闪烁体发生作用产生微弱光，然后由光电倍增管将光信号经过放大产生电信号，再通过运放电路把光电倍增管的微弱电信号进一步放大得到可以检测的电压脉冲信号。但是一方面由于高压电源自身的变化导致经光电倍增管信号放大幅度，另一方面闪烁体探测器的探测效率极易受环境温度及老化情况的影响，因此需要定期进行探测效率的调节使探测器工作在最佳状态。
目前常用的方法为闪烁探测器的效率变化通过检测同一已知活度的放射源时得到的信号脉冲数的多少来判断，设备出厂前采用一个校验源然后调节高压或运算放大器来使探测器处于最佳探测效率时的信号脉数量；出厂后当高压变化，或探测器老化，或温度变化时都会使探测器偏离了最佳探测效率，此时就需要重新调节使探测器回到最佳探测效率状态。
目前调节的方法需要人员带着校验源到设备现场，按照出厂前的方法进行多次测量然后手动调节高压或运放电路增益来使探测器重回最佳探测效率状态；这种方法需要专业的技术人员且要到达设备现场才可以操作，由于设备出厂后安装在全国各地，上门调节操作的周期及费用都是十分高昂，因此采用一 种能远程自动调节的装置就十分有必要。
实用新型内容
为了克服现有技术的不足，本实用新型的目的在于提供自动修正闪烁探测器辐射探测效率的测量装置，本实用新型设计巧妙，实现闪烁探测器辐射探测效率的自动修正调节，节省人工调节的成本。
本实用新型提供自动修正闪烁探测器辐射探测效率的测量装置，包括内含微量长半衰期天然放射性的校验源、屏蔽壳体、驱动装置、连接支架、控制板，所述屏蔽壳体由防核辐射材料制成，其特征在于：所述屏蔽壳体包覆所述校验源；所述屏蔽壳体上设有一供所述校验源放射的敞口；所述驱动装置与所述屏蔽壳体连接；所述连接支架将所述屏蔽壳体安装于探测器上；所述控制板与所述驱动装置电性连接；所述控制板控制所述驱动装置使所述屏蔽壳体上的敞口正对或背对探测器、开启或关闭；所述控制板还与探测器内的高压电路与运放电路连接；所述控制板调节所述高压电路与所述运放电路的增益参数。
优选地，所述连接支架内壁还安装有由防核辐射材料制成的屏蔽层。
优选地，所述驱动装置为旋转电机；所述旋转电机通过轴承安装于所述连接支架上；所述旋转电机连接所述屏蔽壳体；所述屏蔽壳体为回转件；所述旋转电机驱动所述屏蔽壳体旋转使所述敞口正对或背对探测器。
优选地，还包括限位开关，所述限位开关检测所述旋转电机旋转角度，所述限位开关用于定位所述敞口位置。
优选地，所述驱动装置为编码控制的旋转步进电机，所述旋转步进电机通过轴承安装于所述连接支架上；所述旋转步进电机连接所述屏蔽壳体；所述屏蔽壳体为回转件；所述旋转步进电机驱动所述屏蔽壳体旋转使所述敞口正对或背对探测器。
优选地，所述驱动装置为安装于所述敞口上并用于开启或关闭所述敞口的动力执行装置。
优选地，还包括传输模块；所述控制板通过所述传输模块与探测器连接；所述传输模块包括无线传输模块：WIFI模块或蓝牙模块或ZigBee模块和有线传输模块：网络模块或can总线模块或485总线模块。
优选地，所述控制板通过所述WIFI模块或蓝牙模块与移动终端连接通信。
相比现有技术，本实用新型的有益效果在于：
本实用新型提供自动修正闪烁探测器辐射探测效率的测量装置，包括内含微量长半衰期天然放射性的校验源、屏蔽壳体、驱动装置、连接支架、控制板，屏蔽壳体由防核辐射材料制成，其特征在于：屏蔽壳体包覆校验源；屏蔽壳体上设有一供校验源放射的敞口；驱动装置与屏蔽壳体连接；连接支架将屏蔽壳体安装于探测器上；控制板与驱动装置电性连接；控制板控制驱动装置使屏蔽壳体上的敞口正对或背对探测器、开启或关闭；控制板还与探测器内的高压电路与运放电路连接；控制板调节高压电路与运放电路的增益参数。
上述说明仅是本实用新型技术方案的概述，为了能够更清楚了解本实用新型的技术手段，并可依照说明书的内容予以实施，以下以本实用新型的较佳实施例并配合附图详细说明如后。本实用新型的具体实施方式由以下实施例及其附图详细给出。
附图说明
此处所说明的附图用来提供对本实用新型的进一步理解，构成本申请的一部分，本实用新型的示意性实施例及其说明用于解释本实用新型，并不构成对本实用新型的不当限定。在附图中：
图1为本实用新型的自动修正闪烁探测器辐射探测效率的测量装置模块化结构示意图；
图2为本实用新型在实施例1中的自动修正闪烁探测器辐射探测效率的测量装置结构原理示意图；
图3为本实用新型的一种实施例中的自动修正闪烁探测器辐射探测效率的测量装置的工作原理示意图。
图中：连接支架1、校验源2、屏蔽壳体30、敞口31、屏蔽层32、探测器4、旋转电机5、限位开关6。
具体实施方式
下面，结合附图以及具体实施方式，对本实用新型做进一步描述，需要说明的是，在不相冲突的前提下，以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。
自动修正闪烁探测器辐射探测效率的测量装置，如图1、图2所示，包括内含微量长半衰期天然放射性的校验源2、屏蔽壳体30、驱动装置、连接支架1、控制板，所述屏蔽壳体30由防核辐射材料制成，所述屏蔽壳体30包覆所述校验源2；所述屏蔽壳体30上设有一供所述校验源2放射的敞口31；所述驱动装置与所述屏蔽壳体30连接；所述连接支架1将所述屏蔽壳体30安装于探测器4上；所述控制板与所述驱动装置电性连接；所述控制板控制所述驱动装置使所述屏蔽壳体30上的敞口31正对或背对探测器4、开启或关闭；所述控制板还与探测器4内的高压电路与运放电路连接；所述控制板调节所述高压电路与所述运放电路的增益参数。
优选地，为防止校验源2在无需校验时尽量减少对探测器4的影响，在校验源2不使用即存储位置时将校验源2进行防核辐射完全包裹，如图2所示， 所述连接支架1内壁还安装有由防核辐射材料制成的屏蔽层32。
如图1、图2所示，所述驱动装置为旋转电机5；所述旋转电机5通过轴承安装于所述连接支架1上；所述旋转电机5连接所述屏蔽壳体30；所述屏蔽壳体30为回转件；所述旋转电机5驱动所述屏蔽壳体30旋转使所述敞口31正对或背对探测器4。在实施例1中，还包括限位开关6，所述限位开关6检测所述旋转电机5旋转角度，所述限位开关6用于定位所述敞口31位置。在本实施例中，限位开关6存在两种配置，第一种为单档位设置，在360°范围内均匀设置两个限位开关6，旋转电机5上设置有一个触发档位，当旋转电机5旋转180°时触发档位触发其中一个限位开关6时，旋转电机5停止，此时敞口31正对探测器4，探测器4利用校验源2进行修正，修正完成后，旋转电机5旋转沿原旋转方向旋转180°触发档位触发另一个限位开关6，旋转电机5停止，此时敞口31背对探测器4；第二种为双单位设置，在旋转电机5的360°范围内均匀设置两个触发档位，此时仅需一个限位开关6，当旋转电机5旋转180°时其中一个触发档位触发限位开关6，旋转电机5停止，此时敞口31正对探测器4，探测器4利用校验源2进行修正，修正完成后，旋转电机5旋转沿原旋转方向反向旋转180°另一触发档位触发限位开关6，旋转电机5停止，此时敞口31背对探测器4。
在实施例2中，所述驱动装置为编码控制的旋转步进电机，所述旋转步进电机通过轴承安装于所述连接支架1上；所述旋转步进电机连接所述屏蔽壳体30；所述屏蔽壳体30为回转件；所述旋转步进电机驱动所述屏蔽壳体30旋转使所述敞口31正对或背对探测器4。旋转步进电机由编码控制，被配置成每次仅旋转180°，控制板每次触发，旋转步进电机仅旋转半周，确保所述敞口31正对或背对探测器4。
在实施例3中，所述驱动装置为安装于所述敞口31上并用于开启或关闭所述敞口31的动力执行装置。在本实施例中，驱动装置被配置成开启或关闭所述敞口31的动力执行装置，如内壁或外壁附有防核辐射材料制成的可移动或可旋转开启的开口，当开口开启时，校验源2辐射探测器4，测器4利用校验源2进行修正，修正完成后，开口关闭。
优选地，还包括传输模块；所述控制板通过所述传输模块与探测器4连接；所述传输模块包括无线传输模块：WIFI模块或蓝牙模块或ZigBee模块和有线传输模块：网络模块或can总线模块或485总线模块。在实施例4中，所述控制板通过所述WIFI模块或蓝牙模块与移动终端连接通信。应当理解，控制板可以被配置成自行进行自动定时或定次修正或仅接受修正指令两种方式，第一种为自动定时或定次修正，即在控制板内写入定时或计数程序，其中，自动定时修正为记录上次修正的时间并进行倒计时，时间为零时进行自动修正；自动定次修正为记录上次修正后探测器4的允许使用次数，并每使用一次进行次数减一直至允许使用次数为零后进行自动修正；第二种为利用移动终端进行交互，通过WIFI模块或蓝牙模块使控制板与移动终端建立连接通信，使用者可通过移动终端发出修正指令控制控制板进行修正。
以下还提供本实用新型的一种实施例中的自动修正闪烁探测器辐射探测效率的测量装置的工作原理，如图3所示，包括以下步骤：
S11、出厂前初始化，记录闪烁探测器位于最佳探测效率时的高压电路和/或运放电路的增益参数、脉冲频率阈值；其中，脉冲频率阈值为闪烁探测器位于最佳探测效率时测量得到的脉冲频率范围；
S12、启动修正调节，校验单元给控制板发出修正指令，控制板接收到指令后启动修正调节；
S21、启动旋转电机5将敞口31转向探测器4，转动的角度由限位开关6来检测，当限位开关6给出信号旋转电机5停止旋转，敞口31正对探测器4；
S22、信号测量，控制板采集探测器4的信号脉冲数，例如，采集30秒得到测量信号频率；
S23、判定测量信号频率是否超出脉冲频率阈值，若超出，则跳转至步骤S24；若未超出，则无需修正，控制板旋转电机5将敞口31转离探测器4，直至当限位开关6给出信号旋转电机5停止旋转，敞口31背对探测器4；
S24、判定检测高压电路的电压是否与出厂时一致，若一致，则跳转至步骤S25；若不一致，则控制板调节高压运电路的增益参数，使高压电路的电压值接近出厂值；其中，高压运电路的增益参数可通过控制板上集成的调压程序来调节。
S25、再次信号测量，控制板采集闪烁探测器的信号脉冲数，采集30秒得到新的测量信号频率；
S26、判定新的测量信号频率是否超出脉冲频率阈值，若超出，则控制器调节运放电路的增益参数，直至运放电路的增益参数接近出厂值；若未超出，则修正完成，控制板旋转电机5将敞口31转离探测器4，直至当限位开关6给出信号旋转电机5停止旋转，敞口31背对探测器4。其中，运放电路的增益参数可通过控制板上集成的数字电位器来调节。
步骤S11前还包括：建立无线通信，通过WIFI模块或蓝牙模块建立控制板与移动终端连接通信，校验单元为定时触发程序或内置于移动终端的交互式触发程序。应当理解，校验单元可以被配置成自行进行自动定时或定次修正或仅接受修正指令两种方式，第一种为自动定时或定次修正，即在控制板内将校验单元以定时或计数程序写入，其中，自动定时修正为记录上次修正的时间并进 行倒计时，时间为零时进行自动修正；自动定次修正为记录上次修正后探测器4的允许使用次数，并每使用一次进行次数减一直至允许使用次数为零后进行自动修正；第二种为利用移动终端进行交互，校验单元为移动终端的交互程序，通过WIFI模块或蓝牙模块使控制板与移动终端建立连接通信，使用者可通过移动终端发出修正指令控制控制板进行修正，同时基于移动终端可实现自动修正闪烁探测器辐射探测效率的测量装置与云端连接，实现调节过程实时通信，为实现远程调节提供基础。
上述工作原理并未对本实用新型的自动修正闪烁探测器辐射探测效率的测量装置的使用方法做任何改进，仅是在基于本实用新型公开的自动修正闪烁探测器辐射探测效率的测量装置的结构上的常规使用原理。
本实用新型提供自动修正闪烁探测器辐射探测效率的测量装置，包括内含微量长半衰期天然放射性的校验源、屏蔽壳体、驱动装置、连接支架、控制板，屏蔽壳体由防核辐射材料制成，屏蔽壳体包覆校验源；屏蔽壳体上设有一供校验源放射的敞口；驱动装置与屏蔽壳体连接；连接支架将屏蔽壳体安装于探测器上；控制板与驱动装置电性连接；控制板控制驱动装置使屏蔽壳体上的敞口正对或背对探测器、开启或关闭；控制板还与探测器内的高压电路与运放电路连接；控制板调节高压电路与运放电路的增益参数。本实用新型结构合理，设计巧妙，实现闪烁探测器辐射探测效率的自动修正调节，节省人工调节的成本。
以上，仅为本实用新型的较佳实施例而已，并非对本实用新型作任何形式上的限制；凡本行业的普通技术人员均可按说明书附图所示和以上而顺畅地实施本实用新型；但是,凡熟悉本专业的技术人员在不脱离本实用新型技术方案范围内，利用以上所揭示的技术内容而做出的些许更动、修饰与演变的等同变化，均为本实用新型的等效实施例；同时,凡依据本实用新型的实质技术对以上实施 例所作的任何等同变化的更动、修饰与演变等，均仍属于本实用新型的技术方案的保护范围之内。

Claims (8)

  1. 自动修正闪烁探测器辐射探测效率的测量装置，包括内含微量长半衰期天然放射性的校验源(2)、屏蔽壳体(30)、驱动装置、连接支架(1)、控制板，所述屏蔽壳体(30)由防核辐射材料制成，其特征在于：所述屏蔽壳体(30)包覆所述校验源(2)；所述屏蔽壳体(30)上设有一供所述校验源(2)放射的敞口(31)；所述驱动装置与所述屏蔽壳体(30)连接；所述连接支架(1)将所述屏蔽壳体(30)安装于探测器(4)上；所述控制板与所述驱动装置电性连接；所述控制板控制所述驱动装置使所述屏蔽壳体(30)上的敞口(31)正对或背对探测器(4)、开启或关闭；所述控制板还与探测器(4)内的高压电路与运放电路连接；所述控制板调节所述高压电路与所述运放电路的增益参数。
  2. 如权利要求1所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：所述连接支架(1)内壁还安装有由防核辐射材料制成的屏蔽层(32)。
  3. 如权利要求1或2所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：所述驱动装置为旋转电机(5)；所述旋转电机(5)通过轴承安装于所述连接支架(1)上；所述旋转电机(5)连接所述屏蔽壳体(30)；所述屏蔽壳体(30)为回转件；所述旋转电机(5)驱动所述屏蔽壳体(30)旋转使所述敞口(31)正对或背对探测器(4)。
  4. 如权利要求3所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：还包括限位开关(6)，所述限位开关(6)检测所述旋转电机(5)旋转角度，所述限位开关(6)用于定位所述敞口(31)位置。
  5. 如权利要求1或2所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：所述驱动装置为编码控制的旋转步进电机，所述旋转步进电机通 过轴承安装于所述连接支架(1)上；所述旋转步进电机连接所述屏蔽壳体(30)；所述屏蔽壳体(30)为回转件；所述旋转步进电机驱动所述屏蔽壳体(30)旋转使所述敞口(31)正对或背对探测器(4)。
  6. 如权利要求1或2所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：所述驱动装置为安装于所述敞口(31)上并用于开启或关闭所述敞口(31)的动力执行装置。
  7. 如权利要求1所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：还包括传输模块；所述控制板通过所述传输模块与探测器(4)连接；所述传输模块包括无线传输模块：WIFI模块或蓝牙模块或ZigBee模块和有线传输模块：网络模块或can总线模块或485总线模块。
  8. 如权利要求7所述的自动修正闪烁探测器辐射探测效率的测量装置，其特征在于：所述控制板通过所述WIFI模块或蓝牙模块与移动终端连接通信。
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