CN214225438U

CN214225438U - Radioactive source real-time monitoring device

Info

Publication number: CN214225438U
Application number: CN202022972382.8U
Authority: CN
Inventors: 许杰; 董闯
Original assignee: Chongqing Hongmeng Technology Co ltd
Current assignee: Chongqing Hongmeng Technology Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-09-17
Anticipated expiration: 2030-12-11

Abstract

The utility model belongs to the technical field of the radiation source management, specifically disclose a radiation source real time monitoring device, including radiation data collection module, active RFID collection module, the information detection module that targets in place, acceleration sensor and host computer, radiation data collection module's first input and second input are located respectively in the source storehouse and the on-vehicle radiation source storage department, active RFID collection module's signal acquisition end sets up on the source jar, the information detection module that targets in place is used for detecting the information on throne of the source jar that corresponds the position, acceleration sensor establishes on the source jar, the host computer respectively with radiation data collection module, active RFID collection module, information detection module and acceleration sensor that targets in place are connected. By adopting the technical scheme, the real-time monitoring of the vehicle-mounted radioactive source and the radioactive source in the source warehouse is realized by utilizing the cooperation of each module and the acceleration sensor.

Description

Radioactive source real-time monitoring device

Technical Field

The utility model belongs to the technical field of the radiation source management, a radiation source real-time monitoring device is related to.

Background

The radioactive sources are widely distributed in industrial systems such as oil exploration, nondestructive inspection and the like, particularly, the radioactive sources with higher risk of over III types can damage normal cells of a human body due to high-energy ionizing radiation particles, and cause permanent damage and even death to the human body when the radioactive sources are exposed for a long time. Meanwhile, as the mobility of related operations of radioactive source management is strong, and the appearance of the radioactive source does not have the characteristic of specific identification, and more manual links are needed in the using process, once the radioactive source is lost or stolen by terrorists, serious consequences can be caused to the society.

The radioactive source is generally stored in a special canister, and the combination of the radioactive source and the canister is referred to as a source canister. A radioactive source library, called a source library for short, is a place for temporarily storing radioactive sources, and most of the prior art manually supervises the warehousing and delivery of the radioactive sources by means of manual registration, paper ledger statistics and the like, which wastes manpower and has low efficiency.

Meanwhile, in order to avoid the loss of the radioactive source in the transportation process, whether the radioactive source tank is on a transport vehicle or not is usually judged by monitoring a radiation dose signal and the like output by a radiation data acquisition module (which is arranged on the radioactive source tank) in real time, the radiation data acquisition module is required to work all the time in the transportation process, however, the radiation data acquisition module is powered by a battery, the electric quantity of the battery is limited, the electric consumption in the transportation process is large, and the available electric quantity for the operation of the radioactive source tank can be reduced, so that the operation time of the radioactive source tank can be reduced. If increase battery capacity, on the one hand can increase the cost, on the other hand also can increase radiation data acquisition module size and weight, does not change and carries and transports, has still caused the energy waste.

In addition, the transportation tool is difficult to avoid vibration and jolt in the operation process, the background radiation level of the environment along the way is also influenced by factors such as fluctuation and the like, and the judgment of whether radioactive articles are in place or not is difficult only by the pressure sensor or the radiation dose detection, so that misjudgment of the detection conclusion is easily caused, the alarm is triggered by mistake to consume manpower for inspection, or the radioactive source is left to leak out when the alarm is not timely.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a radiation source real time monitoring device realizes the real-time automatic monitoring to on-vehicle radiation source and source storehouse radiation source, gathers source jar information comprehensively, guarantees the accuracy of detecting the conclusion.

In order to achieve the above object, the basic scheme of the utility model is: a real-time monitoring device for a radioactive source comprises a radiation data acquisition module, an active RFID acquisition module, an in-place information detection module, an acceleration sensor and a host;

the first input end and the second input end of the radiation data acquisition module are respectively arranged in the source warehouse and the vehicle-mounted radioactive source storage position and are used for detecting radiation information of the radioactive source at the corresponding position;

the signal acquisition end of the active RFID acquisition module is arranged on the source tank and is used for identifying the ID information of the source tank stored in the source warehouse or the vehicle-mounted storage place;

the first acquisition end of the in-place information detection module is arranged inside or outside the warehouse door of the source warehouse, the second acquisition end of the in-place information detection module is arranged outside the warehouse door of the source warehouse, a space is arranged between the first acquisition end and the second acquisition end of the in-place information detection module, and the third acquisition end of the in-place information detection module is positioned at the storage position of the vehicle-mounted radioactive source and used for detecting the in-place information of the source tank at the corresponding position;

the acceleration sensor is arranged on the source tank and used for detecting acceleration signals when the source tank stored in the source warehouse and the vehicle-mounted storage position moves;

the host is respectively connected with the radiation data acquisition module, the active RFID acquisition module, the in-place information detection module and the acceleration sensor.

The working principle and the beneficial effects of the basic scheme are as follows: the radiation data acquisition module can detect the radiation dose size of the radiation source tank in the source storehouse and the vehicle-mounted storage, and transmits the acquired radiation signal to the host, and the staff acquires information through the host and judges whether the source tank is lack or leaked. And identifying whether the source tank is to be in a source warehouse or a vehicle-mounted storage place or not according to the signal acquisition range of the active RFID acquisition module, and sending a detection signal to the host. The in-place information detection module judges the in-and-out direction of the source tank according to the sequence of in-place information detected by the first acquisition end and the second acquisition end, detects in-place information of the source tank at the vehicle-mounted storage position, and transmits the information to the host machine so as to be conveniently acquired by a worker. The acceleration sensor can detect the acceleration signal of the source tank, and when the source tank is stolen or normally transported, the acceleration sensor can detect the obvious acceleration signal on the source tank, so that the information that the source tank is in a moving state is known. Above-mentioned signal can be gathered to whole device, and signal acquisition is more comprehensive, is favorable to the staff to carry out comprehensive judgement, avoids leading to the misjudgement because of the information is not enough, through the accuracy of inspection judgement.

The system further comprises a motion judgment module, wherein the input end of the motion judgment module is respectively connected with the vehicle-mounted in-place information output end of the in-place information detection module and the vehicle-mounted source tank information output end of the acceleration sensor, and the output end of the motion judgment module is connected with the standby control end of the collection end of the radiation data collection module, which is positioned at the storage position of the vehicle-mounted radioactive source.

The motion judgment module receives output signals of the in-place information detection module and the acceleration sensor, when the source tank does not move (namely is static on the transport vehicle), the motion judgment module outputs a first control signal to enable the radiation data acquisition module to enter a standby mode, and the radiation data acquisition module stops acquiring the radiation signals of the source tank, so that electric quantity can be greatly saved, and operation time is prolonged. When the detection source tank is not in place and is in a motion state, the motion judgment module outputs a second control signal to enable the radiation data acquisition module not to be in a standby state, and the radiation data acquisition module enters a normal working mode to upload a radiation quantity signal output by the radiation detection module in real time.

Further, the host comprises an AND gate, a NOT gate, a first comparator and a second comparator;

the input end of the NOT gate is connected with the output end of the ID information of the source tank at the vehicle-mounted storage position of the active RFID acquisition module, and the output end of the NOT gate is connected with the first input end of the first AND gate;

the first input end of the first comparator is connected with a radiation threshold memory, the second input end of the first comparator is connected with the vehicle-mounted radioactive source information output end of the radiation data acquisition module, and the output end of the first comparator is connected with the second input end of the first AND gate;

the first input end of the second comparator is connected with an acceleration threshold memory, the second input end of the second comparator is connected with the output end of an acceleration sensor arranged on a source tank of the vehicle-mounted storage position, and the output end of the second comparator is connected with the third input end of the first and second doors.

The active RFID acquisition module sends the detection signal to the NOT gate, and the NOT gate inputs a corresponding signal to the first input end of the AND gate according to the input signal. The radiation data acquisition module transmits the acquired radiation numerical value signal to the first comparator, and the first comparator compares the acquired signal with a storage signal in the radiation threshold storage device, so that whether the signal is output to the second input of the AND gate or not is judged. The acceleration sensor transmits a signal to the second comparator, the principle of the second comparator is the same as that of the first comparator, and the second comparator can output a signal to the third input end of the AND gate. When the AND gate outputs a signal, the vehicle-mounted source tank can be judged to be lost or stolen.

Further, the host comprises a radiation dose judgment module, and the radiation dose judgment module comprises a first reference power supply, a second reference power supply, a third comparator, a fourth comparator and an OR gate;

the output end of the radiation data acquisition module is connected with the negative input end of a third comparator, the output end of a first reference power supply is connected with the positive input end of the third comparator, and the output end of the third comparator is connected with the first input end of the OR gate; the output end of the radiation data acquisition module is connected with the negative input end of a fourth comparator, the output end of a second reference power supply is connected with the positive input end of the fourth comparator, the output end of the fourth comparator is connected with the second input end of the OR gate, and the output end of the OR gate is connected with a radiation alarm unit.

Whether the radiation dose of the source tank is in a normal range or not can be judged, the source tank is empty, and the radiation source protective layer in the source tank is damaged and the like is screened and an alarm signal is sent out, so that the safety management of the radiation source is more comprehensive, and the false detection rate is reduced.

Furthermore, the intelligent alarm device also comprises an alarm unit, wherein the input end of the alarm unit is connected with the alarm signal output end of the host.

The alarm module can give an alarm according to the alarm signal output by the host, and the safety factor is enhanced.

And the host is connected with the output ends of the modules through the first wireless communication module, and the output end of the host is connected with a remote control platform through the second wireless communication module.

The first wireless communication module can transmit the collected monitoring information to the host, normal communication of the information is guaranteed, remote communication between the host and the control platform is achieved through the second wireless communication module, and workers can know the detection information timely.

Further, the motion judgment module comprises a fifth comparator, a motion reference power supply and a second and gate, wherein the positive input end of the fifth comparator is connected with the output end of the motion reference power supply, the negative input end of the fifth comparator is connected with the output end of the motion sensor, the output end of the fifth comparator is connected with the first input end of the second and gate, the output end of the in-place information detection module is connected with the second input end of the second and gate, and the output end of the second and gate is connected with the standby control end of the radiation data acquisition module.

Through the hardware structure circuit of the motion judgment module, when the source tank is placed at the corresponding position, the in-place information detection module outputs a high level, if the signal output by the acceleration sensor is smaller than the output signal of the motion reference power supply, the source tank is considered to be static, the fifth comparator outputs the high level, the AND gate outputs the high level, and the processor is in standby. When the source tank is not in place and the signal output by the acceleration sensor is greater than the output signal of the motion reference power supply, the AND gate outputs low level, and the radiation data acquisition module is awakened from a standby state.

And the input end of the display module is connected with the signal output end of the host.

The display module is used for visually displaying the monitoring information, and is convenient for the staff to check.

Further, still include orientation module, orientation module sets up on the source jar, and orientation module's output is connected with the location signal input of host computer.

The positioning module is used for positioning the source tank, so that a worker can conveniently find the position of the source tank, and the source tank can be found back in time when the conditions such as loss or theft occur.

Drawings

FIG. 1 is a schematic view of the flow structure of the real-time monitoring device for radioactive source of the present invention;

fig. 2 is a schematic diagram of a power supply circuit structure of a radiation data acquisition module of the real-time radiation source monitoring device of the present invention;

fig. 3 is a schematic circuit structure diagram of an acceleration sensor of the real-time monitoring device for a radioactive source of the present invention;

fig. 4 is a schematic circuit structure diagram of the positioning module of the real-time radiation source monitoring device of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the utility model discloses a radiation source real-time monitoring device, including radiation data acquisition module, active RFID collection module, the information detection module that targets in place, acceleration sensor and host computer, the host computer is connected with radiation data acquisition module, active RFID collection module, the information detection module that targets in place and acceleration sensor respectively.

The first input end and the second input end of the radiation data acquisition module are respectively arranged in the source warehouse and the storage position of the vehicle-mounted radioactive source and are used for detecting radiation information of the radioactive source at the corresponding position. Preferably, the radiation data acquisition module comprises a first radiation detector and a second radiation detector, the radiation detector is preferably, but not limited to, an existing BGO radiation detector or a silicon-based radiation detector, preferably, the radiation detector is a radiation detector chip with a model number BG51, a power supply circuit of the radiation detector chip is shown in fig. 2, two RC filter circuits are connected in series in the power supply circuit to filter out power supply noise, the resistance values of R1 and R2 are preferably, but not limited to, 1.8K Ω, and the resistance values of C1 and C2 are preferably, but not limited to, 4.7 uF. The first radiation detector is arranged in the source storage, and the second radiation detector is positioned at the storage place of the vehicle-mounted radioactive source.

And the signal acquisition end of the active RFID acquisition module is arranged on the source tank and is used for identifying the ID information of the source tank stored in the source warehouse or the vehicle-mounted storage place. The preferred active RFID acquisition module comprises an electronic tag and an electronic tag reader, wherein the electronic tag is adhered to the outer wall of the radioactive source storage container, the electronic tag stores information codes of the radioactive source storage container adhered to the electronic tag, the electronic tag reader is used for reading corresponding electronic tag information, and the active RFID acquisition module can be preferably C214042 and the like.

The first acquisition end of the in-place information detection module is arranged in or out of a warehouse door of the source warehouse, the second acquisition end of the in-place information detection module is arranged outside the warehouse door of the source warehouse, a distance is arranged between the first acquisition end and the second acquisition end of the in-place information detection module, and the third acquisition end of the in-place information detection module is positioned at the storage position of the vehicle-mounted radioactive source and used for detecting in-place information of the source tank at the corresponding position. The optimal in-place information detection module comprises a first infrared grating sensor, a second infrared grating sensor and a third infrared grating sensor, the first infrared grating sensor, the second infrared grating sensor and the third infrared grating sensor correspond to a first acquisition end, a second acquisition end and a third acquisition end of the in-place information detection module, the influence of infrared gratings on the environment is small, and a plurality of source tanks can be allowed to enter and exit the source library simultaneously. The host computer receives and judges the sequence of the in-place signals output by the first infrared grating sensor and the second infrared grating sensor, if the in-place signals output by the first infrared grating sensor are received first, the source tank is considered to be taken out of the warehouse, if the in-place signals output by the second infrared grating sensor are received first, the source tank is considered to be put in the warehouse, and the in-and-out direction is judged to be the prior art according to the sequence of the signals output by the two sensors, such as the signals disclosed in the publication No. CN104200568B or CN104077648B, and the description is omitted here.

An acceleration sensor is fixedly adhered to the source tank, the acceleration sensor is preferably but not limited to EGCS, P900, TE7105A and the like, and as shown in FIG. 3, the acceleration sensor is a circuit diagram when an acceleration vibration sensor with the model number of MMA8452Q is selected for detecting acceleration signals when the source tank stored in the source warehouse and the vehicle-mounted storage place moves.

The host computer includes AND gate, not gate, first comparator and second comparator, the input of not gate is connected with the output of the ID information of the source canister of the on-vehicle storage department of active RFID collection module, the output of not gate and the first input of first AND gate are connected, the first input of first comparator is connected with radiation threshold value memory, the second input of first comparator is connected with the on-vehicle radiation source information output end of radiation data collection module, the output of first comparator and the second input of first AND gate are connected, the first input of second comparator is connected with acceleration threshold value memory, the second input of second comparator is connected with the output of locating the acceleration sensor on the source canister of on-vehicle storage department, the output and the first and third input of second comparator are connected. The comparators are preferably, but not limited to, LM324, LM339, and gates are preferably, but not limited to, 7408 or 7409,

the utility model discloses an among the preferred embodiment, radiation source real time monitoring device still includes the motion judgement module, the input of motion judgement module respectively with the on-vehicle information output that targets in place of information detection module and acceleration sensor's on-vehicle source jar information output electric connection, the output of motion judgement module and the standby control end electric connection of the collection end of the on-vehicle radiation source storage department of radiation data collection module. The motion judgment module comprises a fifth comparator, a motion reference power supply and a second AND gate, wherein the positive input end of the fifth comparator is electrically connected with the output end of the motion reference power supply, and the negative input end of the fifth comparator is electrically connected with the output end of the motion sensor. The output end of the fifth comparator is electrically connected with the first input end of the second AND gate, the output end of the in-place information detection module is electrically connected with the second input end of the second AND gate, and the output end of the second AND gate is electrically connected with the standby control end of the radiation data acquisition module. The output voltage range of the motion reference power supply is preferably but not limited to 0 to 20% of the full scale of the output signal of the acceleration sensor, the output voltage can be preset, the motion reference power supply preferably but not limited to comprises a voltage reference chip and a resistance voltage division network, and the output voltage of the voltage reference chip is divided by the resistance voltage division network to obtain a preset voltage value.

The utility model discloses an in a preferred embodiment, the host computer still includes radiation dose judgement module, and radiation dose judgement module includes first reference power supply, second reference power supply, third comparator, fourth comparator and OR gate. The output end of the radiation data acquisition module is connected with the negative input end of the third comparator, the output end of the first reference power supply is electrically connected with the positive input end of the third comparator, and the output end of the third comparator is electrically connected with the first input end of the OR gate. The output end of the radiation data acquisition module is electrically connected with the negative input end of the fourth comparator, the output end of the second reference power supply is electrically connected with the positive input end of the fourth comparator, the output end of the fourth comparator is connected with the second input end of the or gate, the output end of the or gate is connected with a radiation alarm unit, and the or gate is preferably but not limited to 4071.

The output signal of the first reference power supply is smaller than the signal value output when the radiation dose rate detected by the radiation data acquisition module is P1, the output signal of the second reference power supply is larger than the signal value output when the radiation dose rate detected by the radiation data acquisition module is P2, both P1 and P2 are positive numbers, and P1 is smaller than P2. When the radiation dose output by the radiation data acquisition module is between P1 and P2, the OR gate outputs low level and does not start the radiation alarm unit; when the radiation dose output by the radiation detector is less than P1 or greater than P2, the OR gate outputs high level, and the radiation alarm unit is started. Preferably, the value range of P1 is 0-0.09 uSv/h, and the value range of P2 is more than 120 uSv/h. The first reference power supply and the second reference power supply can both select the existing voltage reference chip, or the voltage reference chip and the resistor voltage dividing network are formed, and are conventional technologies in the field, and are not described herein again.

The utility model discloses an in a preferred embodiment, radiation source real time monitoring device still includes alarm unit, alarm unit's input and the alarm signal output of host computer (like the output of AND gate) electric connection, preferred alarm module includes bee calling organ and/or LED lamp.

The utility model discloses an among the preferred embodiment, radiation source real time monitoring device still includes first wireless communication module and second wireless communication module, and the host computer is through the output electric connection of first wireless communication module with each module, and the output of host computer is connected with the remote control platform through second wireless communication module, and first wireless communication module and second wireless communication module are preferred but not limited to for current Lora wireless local area network module.

The utility model discloses an among the preferred embodiment, radiation source real time monitoring device still includes display module, display module's input and the signal output part electric connection of host computer, the preferred display screen of display module.

The utility model discloses an among the preferred embodiment, radiation source real time monitoring device still includes orientation module, and orientation module sets up on the source jar, orientation module's output and the positioning signal input electric connection of host computer. The positioning module is preferably but not limited to an existing GPS positioning module or a Beidou positioning module product, when the Beidou positioning module is selected, a circuit diagram is shown in figure 4, and the Beidou positioning module is connected and communicated with the processor through a UART serial port.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A real-time monitoring device for a radioactive source is characterized by comprising a radiation data acquisition module, an active RFID acquisition module, an in-place information detection module, an acceleration sensor and a host;

2. The real-time radiation source monitoring device according to claim 1, further comprising a motion determination module, wherein an input end of the motion determination module is respectively connected to a vehicle-mounted in-place information output end of the in-place information detection module and a vehicle-mounted source tank information output end of the acceleration sensor, and an output end of the motion determination module is connected to a standby control end of a collection end of a vehicle-mounted radiation source storage of the radiation data collection module.

3. The radiation source real-time monitoring device of claim 1, wherein the host comprises an AND gate, a NOT gate, a first comparator and a second comparator;

4. The real-time radiation source monitoring device of claim 1, wherein the host comprises a radiation dose determination module, the radiation dose determination module comprising a first reference power supply, a second reference power supply, a third comparator, a fourth comparator, and an or gate;

5. The real-time radiation source monitoring device as claimed in claim 1 or 3, further comprising an alarm unit, wherein an input end of the alarm unit is connected with an alarm signal output end of the host.

6. The real-time radioactive source monitoring device of claim 1, further comprising a first wireless communication module and a second wireless communication module, wherein the host is connected to the output ends of the modules through the first wireless communication module, and the output end of the host is connected to the remote control platform through the second wireless communication module.

7. The radiation source real-time monitoring device of claim 2, wherein the motion determination module comprises a fifth comparator, a motion reference power supply and a second and gate, a positive input end of the fifth comparator is connected with an output end of the motion reference power supply, a negative input end of the fifth comparator is connected with an output end of the motion sensor, an output end of the fifth comparator is connected with a first input end of the second and gate, an output end of the in-place information detection module is connected with a second input end of the second and gate, and an output end of the second and gate is connected with a standby control end of the radiation data acquisition module.

8. The real-time radiation source monitoring device as claimed in claim 1, further comprising a display module, wherein an input terminal of the display module is connected to a signal output terminal of the host.

9. The real-time radiation source monitoring device as claimed in claim 1, further comprising a positioning module, wherein the positioning module is disposed on the source canister, and an output end of the positioning module is connected to a positioning signal input end of the host.