Real-time remote monitoring transmission method based on embedded system and dangerous state detection

Abstract

The invention provides a composite dangerous state detection method, and relates to a dangerous state detection and self-power supply method for a diagnostic machine. Comprising two parts, the first part is a detection method, two state detection modes are adopted, the first detection method is used for detecting the position state of a source braid, and the second detection method is used for monitoring the position state of a flaw detector. The innovative point is a self-powered technology of the flaw detection machine, power supply to internal electric equipment is realized by utilizing a radioactive source of the flaw detection machine through a photoelectric effect principle, and the dependence of an external power supply is avoided. In addition, a single-chip microcomputer module is embedded in the flaw detector and is responsible for logic judgment and dangerous state evaluation. The single-chip microcomputer has narrowband Internet of Things communication capability, can still carry out remote alarm in an area with poor signal coverage, and has a global satellite positioning function and an on-site warning function. By combining different detection methods and embedded self-powered and communication capabilities, the invention provides an efficient and safe flaw detector design.

Description

Technical Field

[0001] The present invention relates to a real-time remote monitoring transmission method based on an embedded system and dangerous state detection, in particular to a dangerous state detection method and device for detecting whether the source braid of a flaw detector is retracted and the position of the flaw detector. The two dangerous states are combined for judgment, and a self-powered embedded module design for the flaw detector is proposed, providing narrowband Internet of Things technology to solve the problem of receiving and transmitting signals without power supply. Background Art

[0002] At present, gamma flaw detectors are widely used to detect internal defects in materials, especially when operated at night in remote areas with insufficient power supply or inconvenient communication, which poses a great safety hazard. Due to the lack of experience and protection knowledge of flaw detector operators, radiation safety accidents caused by the source braid falling off often occur. In this case, it is difficult for traditional flaw detection equipment to achieve real-time remote monitoring.

[0003] Although some gamma flaw detectors are already equipped with GPS positioning systems, the technology still has two major bottlenecks. First, since the GPS positioning system is installed outside the flaw detector, it only locates the specific location of the flaw detector shell. When the radioactive source falls off, the positioning system cannot track the location where the radioactive source falls off.

[0004] Secondly, the GPS positioning system requires power supply to transmit signals back to the platform and supervision platform of the flaw detection company. In remote areas without power supply, flaw detection machine positioning and signal transmission cannot be achieved. Summary of the invention

[0005] The present invention provides a real-time remote monitoring transmission method based on embedded system and dangerous state detection, which is characterized by using at least two state detection modules for detection, namely a first detection module and a second detection module.

[0006] The first detection method is used to detect whether the source braid is retracted after being extended, which can be implemented by using a displacement detection switch or a gamma ray sensing detection module.

[0007] The second detection method is used to detect the position state of the flaw detector body, which can be achieved by a displacement detection switch, an infrared detector, an electromagnetic wave detector or a gyroscope and acceleration motion detection.

[0008] The present invention overcomes the current problem that the falling off of the transmitted radioactive source cannot be monitored without a power supply, and provides a method for self-powering an embedded module of a flaw detector. The method is characterized in that the radioactive source of the flaw detector is used to power the flaw detector body based on the principle of photoelectric effect, so that the electrical equipment placed inside the flaw detector can perform flaw detection operations without an external power supply.

[0009] The invention provides a flaw detector state detection structure which can display the dangerous state information of each part of the flaw detector.

[0010] The flaw detector state structure provided by the present invention includes at least a first detection module and a second detection module corresponding to the first detection method and the second detection method. This structure can detect the state of the flaw detector source braid falling off and the state of the flaw detector leaving the monitoring field of view at the first time. The structure also combines the use of energy-saving narrowband Internet of Things technology to realize real-time remote signal transmission back to the monitoring platform.

[0011] The structure provided by the present invention also includes an embedded system, namely a single chip microcomputer. The single chip microcomputer is the logic core of the dangerous state detection method provided by the present invention, collects the state information of the flaw detector obtained by at least two detection modules, and processes it to determine whether the flaw detector is in a dangerous state.

[0012] The MCU also realizes the communication function through the narrowband Internet of Things module. Thanks to the advantages of low power consumption (10 years of use without replacement) and high signal gain of the narrowband Internet of Things, it can realize remote alarm to the control center with the power supply capacity of the flaw detector itself in locations where communication is not used, such as mines and new buildings without cellular signal coverage. This design realizes the rapid and reliable information transmission of dangerous state detection and remote monitoring platform, providing a reliable solution for field flaw detection. The narrowband Internet of Things communication module is connected or built into the MCU circuit board, and the hardware and software interface pre-designed by the manufacturer is used to communicate with the MCU.

[0013] Optionally, a real-time remote monitoring transmission method based on embedded system and dangerous state detection may also include:

[0014] Source braid locking structure: When a radioactive source falls off, the source braid locking mechanism will be locked to prevent the quick connector and the source catheter connected to it from being removed. The key switch located at the source braid locking mechanism position recognizes the locked state of the source braid locking mechanism and feeds back this state to the single-chip microcomputer. At this time, the single-chip microcomputer determines that the flaw detector is in a dangerous state. The present invention realizes reliable monitoring of the state of the radioactive source and rapid alarm, thereby improving the safety and operational reliability of the γ flaw detector in the field environment.

[0015] GPS positioning system: This GPS system is directly integrated on the circuit board of the microcontroller and has a global satellite positioning function to determine the real-time location of the flaw detector.

[0016] On-site alarm equipment: Use sound and light alarm systems such as alarm bells, sirens, and lights. It has the function of emitting visible light and sound to alert staff on site.

[0017] After all information is integrated into the access communication system, it is connected to the local information system and finally to the information system of the Ministry of Ecology and Environment.

[0018] The effective benefits provided by the present invention include:

[0019] Wide applicability: The present invention is particularly suitable for places with limited power supply, complex environment and difficult monitoring, which greatly improves the feasibility of real-time monitoring. The γ-sensing module is self-powered, and the danger signal can be sent without an external power supply. This innovative design has significant practical value, social value and technical advantages in field flaw detection applications.

[0020] Simple implementation: The flaw detector source braid monitoring method in the embodiment of the present invention is conducive to reducing the workload of the calculation process, has low calculation processing requirements for related computing equipment, is conducive to improving the calculation speed, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following description are some embodiments of the present invention, and the drawings required for use are briefly introduced.

[0022] Figure 1 The technical logic diagram of the patent of this invention is shown;

[0023] Figure 2 A schematic diagram of the contents of the first detection module is shown;

[0024] Figure 3 A schematic diagram showing the contents of the second detection module is shown;

[0025] Figure 4 The logic diagram of the key switch is shown;

[0026] Figure 5 A schematic diagram of the principle of the first switch servo circuit is shown;

[0027] Figure 6 A schematic diagram of the second switch servo circuit is shown;

[0028] Figure 7 Schematic diagram showing the source braid locking mechanism provided by the present invention

[0029] Figure 8 The schematic diagram of the gamma-ray sensing module is shown.

[0030] These drawings and descriptions show the specific implementation methods of the present invention, which solve the problem of early warning transmission after the radiation source falls off through binary logic method and narrowband Internet of Things technology, and realize real-time monitoring and remote alarm of the radiation source status in the field environment. DETAILED DESCRIPTION

[0031] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a small part of the embodiments of the present invention, not all of them, and the narrowband Internet of Things technology can be widely used in many scenarios. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention, such as Figure 1 The logical relationship diagram of the patent of the present invention is displayed.

[0032] In the first embodiment of the present invention, the first detection module may be a gamma ray sensing module. The gamma ray sensing module is designed based on the principle of photoelectric effect. When the radiation source extends from the flaw detector, the port of the gamma ray sensing module receives a current signal, thereby waking up the single-chip microcomputer.

[0033] Figure 2 A schematic diagram of the contents of the first detection module in the first embodiment is shown. The first detection module includes a γ displacement detection switch and a γ ray detection module.

[0034] In the second embodiment of the present patent, the second detection module includes a flaw detector displacement detection, an infrared detector, an electromagnetic wave detector, a gyroscope and acceleration motion detection, etc. Figure 3 A schematic diagram showing the contents of the second detection module is shown.

[0035] Preferably, in Embodiment 3, the first detection module and the second detection module provided by this patent can also be implemented by a displacement detection switch. In this embodiment, the first switch is used to implement the function of the first detection module, and the second switch is used to implement the function of the second detection module.

[0036] The position state of the radioactive source is determined by the first switch set at the retracted position of the radioactive source; the position state of the flaw detector is determined by the second switch set outside the bottom shell of the flaw detector; the open and closed states of the switches are used to reflect the state of the flaw detector. These switches perform signal detection and processing through the embedded system to achieve real-time monitoring of the state of the radioactive source.

[0037] To achieve the above technical objectives, the specific implementation of Example 3 includes the following steps:

[0038] Use Figure 4 The binary logic method shown performs logical judgment on the state information provided by the first switch and the second switch.

[0039] The first switch and the second switch are self-pop-up switches, that is, the switches need external force to remain in the pressed state, and when the external force is removed, the switches automatically pop up. Obviously, the pressing and popping of the switch correspond to the on and off states of the circuit respectively, and the present invention does not limit the use of any corresponding relationship, but for the convenience of description, the circuit logic corresponding to the pressing of the switch and the switch being turned on, and the popping of the switch and the switch being turned off will be used in the embodiment.

[0040] Figure 4 There is a binary logic method for the first switch (switch related to the flaw detector source) and the second switch flaw detector position switch: When the flaw detector is moving, the source braid is in the source braid locking mechanism; but the dose measured nearby is high and no alarm is given. When the flaw detector arrives at the flaw detection site, the flaw detector is removed from the vehicle and stops moving. After the source braid extends from the flaw detector locking mechanism, the dose around the flaw detector is low and it starts moving for flaw detection without an alarm. When the flaw detector position is started again, the dose next to the source braid locking mechanism is high and no alarm is given. When the flaw detector position movement accelerates, the dose next to the source braid locking mechanism decreases and an alarm is given.

[0041] Figure 5 The schematic diagram of the principle of the first switch servo circuit is shown, and the first switch is set in the radiation source retraction position or the source braid locking mechanism. Through this circuit, the current state is transmitted to the microcontroller to determine the current dangerous state.

[0042] Figure 6 The schematic diagram of the second switch servo circuit is shown, and the second switch is arranged outside the bottom housing of the flaw detector. Similarly, the current state is transmitted to the microcontroller through the circuit to determine the current dangerous state.

[0043] A first switch is set at the retracted position of the radiation source, and a second switch is set outside the bottom shell of the flaw detector. The first switch and the second switch are self-pop-up switches, that is, the switches need external force to remain in the pressed state, and when the external force is removed, the switches automatically lift up. Obviously, the pressing and popping of the switch correspond to the on and off states of the circuit respectively. The present invention does not limit the use of any corresponding relationship, but for the convenience of explanation, the circuit logic corresponding to the pressing of the switch and the switch being turned on, and the popping of the switch and the switch being turned off will be used in the embodiment.

[0044] The present invention overcomes the defect that the existing radioactive source cannot be monitored to fall off, provides a method for identifying the position state of the radioactive source outside the radioactive source cover by using a binary logic method for the first time to identify whether the radioactive source has fallen off, and solves the transmission problem by receiving signals through a narrowband Internet of Things.

[0045] Figure 7The schematic diagram of the source braid locking mechanism provided by the present invention is shown, which is used to prevent the occurrence of accidents where the radioactive source falls off, and is locked when the radioactive source falls off, preventing the source braid and the source guide tube from being removed.

[0046] When the radioactive source falls off, the source braid locking mechanism is locked, and the quick connector and the source catheter connected thereto are prohibited from being removed. The key switch located at the source braid locking mechanism position recognizes the locked state of the source braid locking mechanism and feeds this state back to the first switch.

[0047] According to the result of logical judgment, the NB-IoT system will issue an alarm, including the local alarm device and the transmission of alarm information to the supervision platform. The feature is that according to the result of logical judgment, if an alarm is required, the NB-IoT system will be used to issue an alarm using the method in the table above. Including: local alarm devices, such as warning lights and sirens, and when it is necessary to report an alarm to the platform, an alarm will also be issued locally.

[0048] Figure 8 The schematic diagram of the gamma-ray sensing module is shown. The module is designed based on the principle of photoelectric effect. When the radiation source extends from the flaw detector, the module port obtains a current signal to wake up the microcontroller, thereby accurately grasping the working status of the radiation source.

[0049] Alarms are issued through logical judgment and narrowband Internet of Things systems, including local alarm devices and transmission of alarm information to the supervision platform. The key switch transmits the current state to the microcontroller through the servo circuit, and the microcontroller determines the current dangerous state according to the preset logic.

[0050] When the radiation source extends from the defect detector, the port of the gamma-ray sensing module obtains a current signal. This current signal is used to wake up the microcontroller. Since the gamma-ray sensing module is designed based on the principle of photoelectric effect, when no gamma rays enter, the circuit is disconnected, and there is only voltage but no current at both ends of the module, that is, no energy consumption; only when the defect detector is working and the source rope is extended, gamma rays will enter the module and current will be generated in the module. Therefore, this solution uses this current signal to wake up the microcontroller, effectively reducing the power consumption of the system.

[0051] Since waste uranium is used as a shielding material for the radioactive source, the gamma rays emitted by the waste uranium can also trigger the above-mentioned photoelectric effect, causing the microcontroller to misjudge the working status of the radioactive source. To solve this problem, a thin layer of lead is wrapped around the gamma ray sensing module. Since the radiation dose of the defect detection source is very different from that of the waste uranium, a thin lead plate of appropriate thickness can block the radiation dose of the waste uranium, but at the same time allow the remaining radiation dose of the defect detection source to pass through and enter the cathode, inducing the photoelectric effect. In this way, the microcontroller can accurately identify the working status of the radioactive source.

[0052] Narrowband Internet of Things communication module: Connect the highly integrated narrowband Internet of Things communication module produced by the narrowband Internet of Things communication module manufacturer to the microcontroller circuit board or build it into the microcontroller integrated circuit, and use the software and hardware interface designed by the narrowband Internet of Things communication module manufacturer at the factory to communicate with the microcontroller.

[0053] When the microcontroller is in sleep mode, the NB-IoT communication module can also obtain instructions from the server, forcing the microcontroller to wake up and execute relevant instructions.

[0054] This research highlights and innovatively optimizes the interaction mode between embedded system modules, making the system have the characteristics of low energy consumption and long life while being safe and accurate.

[0055] From the description of the working process of the above system, it can be seen that in the entire real-time monitoring system, devices with high power consumption (such as GPS positioning system and on-site alarm equipment) are turned off when no alarm is needed and do not consume battery power; low-power devices (such as microcontrollers and narrowband Internet of Things communication modules) are in standby mode when the defect detector is not in use, with extremely low power consumption, which minimizes the power consumption of the real-time monitoring system and prolongs the battery life; the gamma-ray sensing module and monitoring switch adopt analog circuit design based on voltage and current, which can minimize the power consumption of the system. Overall, this patent provides an innovative solution that can effectively solve the problem of early warning transmission after the radiation source falls off, and has broad application prospects.

Claims

1. A method for detecting dangerous state of a flaw detector, characterized in that: At least two state detections are applied: a first detection method and a second detection method.

2. A method for self-powering an embedded module of a flaw detector, characterized in that: The detector uses its own radioactive source and is powered by the photoelectric effect principle, so that the electrical equipment inside the detector can be freed from external power requirements.

3. A flaw detector structure, characterized in that: The first detection module and the second detection module arranged inside the flaw detector correspond to the first detection method and the second detection method, and can display the dangerous status information of each part of the flaw detector.

4. The first detection method according to claim 1, characterized in that: Detecting the source braid position state may include: a source braid displacement detection switch method, a gamma ray induction detection method.

5. The second detection method according to claim 1, characterized in that: Detecting the position status of the flaw detector may include: a flaw detector housing displacement detection switch method, an infrared or electromagnetic wave distance detection method, a gyroscope and accelerometer motion detection method.

6. The first detection module and the second detection module according to claim 3, comprising: Key operated switches, gamma ray sensing modules, infrared or electromagnetic wave distance detection modules, gyroscope and accelerometer motion detection modules.

7. The key-operated switch according to claims 3 and 6 comprises a first switch and a second switch; the position state of the radiation source is determined by the first switch arranged at the retracted position of the radiation source; the position state of the flaw detector is determined by the second switch arranged outside the bottom shell of the flaw detector; the open and closed states of the switch are used to reflect the state of the flaw detector.

8. According to the flaw detector structure of claim 3, it also includes a single-chip microcomputer module built into the flaw detector body, and the single-chip microcomputer is responsible for performing logical judgment based on the γ flaw detector dangerous state detection method to determine whether the flaw detector is in a dangerous state.

9. The single-chip microcomputer according to claims 3 and 8 also has the communication capability of using narrowband Internet of Things. Thanks to the low power consumption and high signal gain of narrowband Internet of Things, it can be used in locations where communication is not used, such as mines and newly built buildings without cellular signal coverage, to remotely alarm the control center with the help of the power supply capacity of the flaw detector itself.

10. The single chip microcomputer according to claim 3 and 8 also has a global satellite positioning function to determine the real-time location of the flaw detector; the single chip microcomputer also has the function of emitting visible light and sound to warn the staff on site.

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