CN213517949U - Crack monitoring system - Google Patents
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- CN213517949U CN213517949U CN202022833420.1U CN202022833420U CN213517949U CN 213517949 U CN213517949 U CN 213517949U CN 202022833420 U CN202022833420 U CN 202022833420U CN 213517949 U CN213517949 U CN 213517949U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to a crack monitoring system, including coordinator, repeater, a plurality of crack monitoring devices all include terminal zigBee module, and the zigBee network of organizing oneself is constituteed to coordinator, repeater and each crack monitoring devices's terminal zigBee module, and each crack monitoring devices still includes: the baffle is fixed on one side of the crack to be monitored by the crack monitoring device; the contact is arranged opposite to the baffle; the displacement sensor is used for measuring the distance between the contact and the baffle so as to reflect the width of the crack; the device comprises a displacement sensor, an altimeter and a temperature sensor, wherein the displacement sensor is used for correcting data of the displacement sensor so as to obtain real width data of a crack; aviation terminal for measured data output, the opposite side links to each other with its box around simultaneously, prevents that the device from falling in the high altitude under bad weather. The utility model discloses a zigBee network with ad hoc network function has avoided the huge work load that extensive cabling brought.
Description
Technical Field
The utility model relates to a measurement field especially relates to a crack monitoring system.
Background
Containment vessel of nuclear power station: the reactor plant is a cylindrical prestressed reinforced concrete structure with a quasi-spherical dome, and is used for preventing fission products from fuel and primary circuit radioactive substances from entering the last barrier of the environment. When a Loss of Coolant Accident (LOCA) occurs in the reactor, a large amount of radioactive and high-temperature and high-pressure steam-water mixture released can be contained and isolated to prevent damage to residents around the nuclear power plant.
The complex pouring process and environmental factors can cause the concrete surface of the containment vessel of the nuclear power station to be carbonized, the defects of cracks or breakage and the like are generated, the steel bars and the prestressed system are corroded, the bearing capacity is reduced, the service life of the containment vessel is influenced, and therefore the containment vessel must be periodically subjected to defect detection.
SUMMERY OF THE UTILITY MODEL
Based on this, there is a need for a fracture monitoring system.
The utility model provides a crack monitoring system, includes zigBee coordinator, zigBee repeater, a plurality of crack monitoring devices all include terminal zigBee module, zigBee coordinator, zigBee repeater and each crack monitoring device's terminal zigBee module constitute zigBee ad hoc network, each crack monitoring device still includes:
the baffle is fixed on one side of the crack to be monitored by the crack monitoring device;
the contact is arranged opposite to the baffle;
the host machine shell is fixed on the other side of the crack, an accommodating cavity is formed inside the host machine shell, and a terminal ZigBee module of the crack monitoring device is arranged in the accommodating cavity;
the displacement sensor is used for measuring the distance between the contact and the baffle so as to reflect the width of the crack, is arranged in the accommodating cavity and is fixedly connected with the host, and is also connected with the contact;
and the terminal ZigBee module of each crack monitoring device is used for transmitting the distance to the ZigBee coordinator, and then transmitting the distance to an upper computer by the ZigBee coordinator.
In one embodiment, each crack monitoring device includes a metal bottom plate fixed to the other side of the crack, the host housing includes an upper housing and a lower housing, the accommodating cavity includes an upper cavity formed by the upper housing and a lower cavity formed by the lower housing, and the lower housing and the displacement sensor are fixed to the metal bottom plate.
In one embodiment, each crack monitoring device comprises a temperature sensor fixed on the metal base plate, and a terminal ZigBee module of each crack monitoring device is used for transmitting temperature information detected by the temperature sensor to the ZigBee coordinator, and then transmitting the temperature information to an upper computer for temperature compensation by the ZigBee coordinator.
In one embodiment, each crack monitoring device comprises a processing module, the processing module is arranged in the upper cavity and electrically connected with the displacement sensor and the temperature sensor, the processing module is used for setting an acquisition time interval, driving the displacement sensor and the temperature sensor to perform periodic measurement according to the acquisition time interval, driving the crack monitoring device to enter a dormant state at a measurement gap, and transmitting the temperature information and the distance to a terminal ZigBee module of the crack monitoring device.
In one embodiment, each crack monitoring device includes an altimeter disposed in the upper chamber, and the processing module is configured to compare an altitude detected by the altimeter with a preset height, and output a prompt message when the difference is greater than a preset range.
In one embodiment, the altitude gauge has an accuracy of 0.05 meters.
In one embodiment, each of the crack monitoring devices comprises:
the displacement sensor is electrically connected with the interior of the upper cavity through the aviation terminal, and the aviation terminal is used for outputting measurement data;
and one end of the anti-falling device is connected with the aviation terminal, and the other end of the anti-falling device is connected with the surrounding box.
In one embodiment, the displacement sensor is a grating sensor.
In one embodiment, the grating sensor comprises:
a glass grating having a gap, connected to the contact;
the light source is arranged on one side of the glass grating;
the optical sensor is arranged on the other side of the glass grating;
and the decoder is used for decoding a signal formed by the light which is transmitted by the light source through the grating and irradiated on the light sensor.
In one embodiment, the device comprises 45 crack monitoring devices for monitoring the first 15 concrete cracks with the width of 0.3mm and the length of more than 1m, or the length of more than 10m and 10 cracks around 3 gates of the containment vessel of the nuclear power plant.
Above-mentioned crack monitoring system, baffle and host computer shell are installed respectively in the both sides in crack. When the crack width changes, the distance between the baffle and the host shell also changes, the contact can generate displacement along with the host shell because the displacement sensor is fixedly connected with the host shell, and the displacement sensor measures the distance change between the baffle and the contact to obtain the data of the crack width change. The ZigBee network with the ad hoc network function is adopted, and the data of the width of the crack is transmitted to the upper computer in a ZigBee-based wireless transmission mode, so that huge workload caused by large-scale long-distance cable laying is avoided, the test efficiency and quality are improved, and the risk of high-altitude falling of an operator during cable laying is greatly reduced. The ZigBee network has the characteristics of low manufacturing cost, good self-healing performance and stable transmission, and realizes real-time wireless transmission of the evolution data of the appearance defects of the containment vessel, so that the evolution and development trends of the cracks of the containment vessel are mastered in real time, and a real-time basis is provided for the strength analysis of the containment vessel.
Drawings
For a better understanding of the description and/or illustration of embodiments and/or examples of the inventions disclosed herein, reference may be made to one or more of the drawings. The additional details or examples used to describe the figures should not be considered as limiting the scope of the disclosed invention, the presently described embodiments and/or examples, and any of the best modes of such presently understood invention.
FIG. 1 is a schematic diagram of a ZigBee ad hoc network formed by a crack monitoring system in one embodiment;
FIG. 2 is a plan effect view of the crack monitoring device installed on a nuclear power plant concrete containment vessel;
FIG. 3 is a schematic diagram of a crack monitoring device;
FIG. 4 is a schematic structural diagram of a crack monitoring device according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it can be directly on, adjacent to, connected or coupled to the other elements or layers or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.
Spatial relational terms such as "under," "below," "under," "above," "over," and the like may be used herein for convenience in describing the relationship of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, then elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
The application provides a crack monitoring system, including zigBee coordinator, zigBee repeater, a plurality of crack monitoring devices, each crack monitoring device all includes terminal zigBee module, and zigBee coordinator, zigBee repeater and each crack monitoring device's terminal zigBee module constitute zigBee ad hoc network, as shown in figure 1. The terminal ZigBee module can be directly communicated with the ZigBee coordinator and also can be communicated with the ZigBee coordinator through the ZigBee repeater. The ZigBee coordinator and the ZigBee repeater can be powered by the lithium batteries of the ZigBee coordinator and the ZigBee repeater. Each crack monitoring device further comprises:
the baffle is fixed on one side of the crack to be monitored by the crack monitoring device;
the contact is arranged opposite to the baffle;
the host machine shell is fixed on the other side of the crack, an accommodating cavity is formed inside the host machine shell, and a terminal ZigBee module of the crack monitoring device is arranged in the accommodating cavity;
the displacement sensor is used for measuring the distance between the contact and the baffle so as to reflect the width of the crack, is arranged in the accommodating cavity and is fixedly connected with the host, and is also connected with the contact;
and the terminal ZigBee module of each crack monitoring device is used for transmitting the distance to the ZigBee coordinator, and then transmitting the distance to an upper computer by the ZigBee coordinator.
Above-mentioned crack monitoring system, baffle and host computer shell are installed respectively in the both sides in crack. When the crack width changes, the distance between the baffle and the host shell also changes, the contact can generate displacement along with the host shell because the displacement sensor is fixedly connected with the host shell, and the displacement sensor measures the distance change between the baffle and the contact to obtain the data of the crack width change. The ZigBee network with the ad hoc network function is adopted, and the data of the width of the crack is transmitted to the upper computer in a ZigBee-based wireless transmission mode, so that huge workload caused by large-scale long-distance cable laying is avoided, the test efficiency and quality are improved, and the risk of high-altitude falling of an operator during cable laying is greatly reduced. The ZigBee network has the characteristics of low manufacturing cost, good self-healing performance and stable transmission, and realizes real-time wireless transmission of the evolution data of the appearance defects of the containment vessel, so that the evolution and development trends of the cracks of the containment vessel are mastered in real time, and a real-time basis is provided for the strength analysis of the containment vessel.
In one embodiment of the present application, the fracture monitoring system described above may be used for containment crush test (CTT). The containment vessel compression test is used for simulating and verifying the sealing capability of the containment vessel under the condition of a large-break-port loss of water (LOCA) accident, has very important significance for guaranteeing the operation of a nuclear power plant, and is required to be carried out in both a unit construction stage and a unit operation stage. The crack monitoring system comprises 45 crack monitoring devices for monitoring cracks on the surface of the concrete safety shell and around the gate of the nuclear power station. Before a containment vessel pressure test is started, continuously monitoring the first 15 cracks which are found by initial inspection and reach key attention standards (the width reaches 0.3mm, the length reaches more than 1m, or the length reaches more than 10 m) by using a crack monitoring device; if less than 15 cracks reach the attention standard, other more serious cracks are selected to complement 15 installation crack monitoring devices for continuous monitoring in consideration of sensitivity.
Fig. 2 is a plan view of the crack monitoring device installed on a concrete containment of a nuclear power plant, and fig. 3 is a structural schematic diagram of the crack monitoring device. In one embodiment of the present application, each of the fracture monitoring devices includes a metal base plate secured to the same side of the fracture as the host enclosure. The host shell comprises an upper shell and a lower shell, the lower shell is a plastic shell integrally designed with the upper shell, a containing cavity inside the host shell comprises an upper cavity formed by the upper shell and a lower cavity formed by the lower shell, and the lower shell and the displacement sensor are fixed on the metal bottom plate.
In one embodiment of the present application, the crack monitoring device further comprises a temperature sensor. The temperature sensors are fixed on the metal bottom plate, and the terminal ZigBee modules of the crack monitoring devices are used for transmitting temperature information detected by the temperature sensors to the ZigBee coordinator and then transmitting the temperature information to the upper computer for temperature compensation through the ZigBee coordinator. The upper computer corrects the crack change data according to the temperature data measured by the temperature sensor, so that actual crack width change data are obtained. In an embodiment of the application, the upper computer receives the crack data transmitted by the monitoring device, corrects the temperature of the crack data, dynamically analyzes the corrected crack evolution and development trend and the actual pressure in the containment vessel in real time, and immediately sends out an alarm to remind testers of paying attention to prevent the containment vessel from being structurally damaged if the evolution and development trend of the crack does not meet the actual pressure change trend in the containment vessel.
The temperature sensor is fixed on the metal bottom plate and is in direct contact with the metal bottom plate, and the metal bottom plate is fixed on the concrete containment. Therefore, the temperature sensor can detect the temperature of the concrete containment beside the crack, so that the upper computer can perform temperature compensation according to the temperature, and the measurement precision is high (about 15 times of that of the traditional measurement technical scheme). And the upper computer receives the crack data transmitted by the monitoring device, corrects the temperature of the crack data, can perform real-time dynamic analysis on the corrected crack evolution and development trend and the actual pressure in the containment, and immediately sends out an alarm to remind testers of paying attention to the crack data and prevent the containment from structural damage if the evolution and development trend of the crack does not meet the actual pressure change trend in the containment.
In an embodiment of this application, crack monitoring devices still includes processing module, processing module locates in the epicoele and with displacement sensor and temperature sensor electric connection, processing module is used for setting up the acquisition time interval, according to the acquisition time interval drive displacement sensor and temperature sensor carry out periodic measurement, still are used for measuring clearance drive crack monitoring devices and get into dormant state, and be used for with temperature information and distance transmission give crack monitoring devices's terminal zigBee module. In an embodiment of the application, the data acquisition time interval is set to be 10 minutes, so every ten minutes in the whole acquisition stage, the crack monitoring device can send acquired distance and temperature data to an upper computer through a ZigBee network, the crack monitoring device enters a sleep mode after single acquisition work is finished, only the processing module is reserved for low-power operation, and the crack monitoring device works again when data acquisition is carried out for the next time. The periodic measurement and the sleep enable the device to consume less power and save more power. When the device is in failure or no electricity, the measured data transmitted to the receiving host computer is necessarily abnormal, and the failed device can be found and replaced in time by analyzing the measured data.
In an embodiment of the application, the crack monitoring device further comprises an altimeter, the altimeter is arranged in the upper cavity, and the processing module is used for comparing the altitude detected by the altimeter with a preset height and outputting prompt information when the difference is larger than a preset range. The prompt information can be sent to the upper computer through the ZigBee network to prompt an operator, and can also be sent to an indicator lamp on the crack monitoring device to prompt. Specifically, crack monitoring devices installs after, can carry out the self-checking of mounted position, compares the height with predetermineeing with the height above sea level that the altimeter detected, prevents that the mounted position mistake from bringing the reading confusion. In the crack monitoring device working process, the altitude detected by the altimeter is compared with the preset height, and the slip of the crack monitoring device caused by the insecure installation and other reasons can be found in time.
In one embodiment of the present application, the accuracy of the altimeter is 0.05 meters.
In one embodiment of the present application, the fracture monitoring device further comprises:
the displacement sensor is electrically connected with the interior of the upper cavity through the aviation terminal and is used for outputting measurement data;
and one end of the anti-falling device is connected with the aviation terminal, and the other end of the anti-falling device is connected with the surrounding box.
The anti-falling device can prevent the crack monitoring device from falling off due to outdoor long-time insolation or storm weather, so that the risk of falling from high altitude is caused.
In one embodiment of the present application, the displacement sensor is a grating sensor.
In one embodiment of the present application, the grating sensor includes:
a glass grating having a gap, connected to the contact;
the light source is arranged on one side of the glass grating;
the optical sensor is arranged on the other side of the glass grating;
and the decoder is used for decoding a signal formed by the light which is transmitted by the light source through the grating and irradiated on the light sensor.
The grating sensor is also called a grating ruler or a grating length meter, a glass grating with a slit is arranged in the middle of the grating sensor, one side of the glass grating is provided with an LED light source, and the other side of the glass grating is provided with a light sensor (photocell). The glass grating is fixed with an external contact, when the contact moves, the glass grating moves under the light source, light penetrating through the grating can form a signal with a certain rule on the photocell, and displacement data can be decoded through the decoder.
FIG. 4 is a schematic structural diagram of a crack monitoring device according to an embodiment. In the embodiment shown in fig. 4, the processing module includes a single chip microcomputer.
In the embodiment shown in FIG. 4, the crack monitoring device further includes a displacement sensor, a contact tip, and a temperature sensor. The baffle and the contact are respectively arranged on two sides of the crack. The displacement sensor is electrically connected with the single chip microcomputer through the 16-bit A/D conversion module and used for measuring the distance between the baffle and the contact and transmitting the distance data to the single chip microcomputer. Considering that the device is applied in low power consumption, the device can enter a dormant state in an acquisition interval, so that the power supply of the displacement sensor can be cut off at regular time, and therefore the displacement sensor selects an absolute length meter. In this example, an ACANTO series absolute length gauge of Heidenhain Germany was used, and AT1218 was used as the model. The temperature sensor is connected with the single chip microcomputer and used for measuring the temperature of the containment and transmitting temperature data to the single chip microcomputer. The temperature sensor of the present embodiment is a DS18B20 sensor of MAXIM.
In the embodiment shown in FIG. 4, the fracture monitoring device further comprises a wireless transmission module. The wireless transmitting module that this embodiment chose for use is SMA whip antenna, and SMA whip antenna is comprehensive high gain antenna, and antenna gain can reach 8dBi, can provide better wireless transmission performance for crack monitoring devices. The single chip microcomputer is also used for transmitting the distance data and the temperature data to the wireless transmitting module, and the wireless transmitting module receives the distance data and the temperature data and transmits the distance data and the temperature data to the upper computer in a wireless mode.
In the embodiment shown in FIG. 4, the crack monitoring device further comprises a memory circuit.
The storage circuit is connected with the single chip microcomputer and used for storing data measured by the crack monitoring device within the cache time.
In an embodiment of the application, the single chip microcomputer is further configured to draw a trend graph according to the measured data in the cache time. The trend graph facilitates a tester to feel the cracks and the temperature change more intuitively.
In one embodiment of the present application, the crack monitoring device includes 3 indicator lights for indicating the device status, the 3 LED indicator lights respectively represent:
the charging indicator light is on constantly during charging and is off when the charging is finished;
the operation indicator light flickers when the device is powered on;
the networking indicator light flashes after the device is successfully networked, and the device is extinguished when the networking is failed or the wireless device is turned off.
In order to ensure that the power consumption of the device is as low as possible, 2 indicator lamps which are operated and networked adopt a flashing mode, the duty ratio of flashing is 20 percent, and the average current consumption of each LED is reduced to 1 mA. The indicator lights may be driven by a display circuit.
In one embodiment of the application, the circuit board, the 3 indicator lamps, the altimeter and the terminal ZigBee module are all arranged in an upper cavity in the upper shell. The upper casing is a waterproof plastic casing, and meets the protection grade of IP 65. The lower shell is positioned below the upper shell and used for packaging and fixing the displacement sensor. The contact is connected with the displacement sensor and extends out of the lower shell. The machine is not required to be designed to be waterproof, because the selected displacement sensor can achieve the protection level of IP 67.
In one embodiment of the present application, the crack monitoring device further comprises a waterproof aerospace terminal. One end of the waterproof aviation terminal is packaged on the upper shell and is electrically connected with the circuit board in the upper shell, and the other end of the waterproof aviation terminal is packaged on the lower shell and is connected with the displacement sensor for data transmission between the displacement sensor and the circuit board.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," 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, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The crack monitoring system is characterized by comprising a ZigBee coordinator, a ZigBee repeater and a plurality of crack monitoring devices, wherein the crack monitoring devices comprise terminal ZigBee modules, the ZigBee coordinator, the ZigBee repeater and the terminal ZigBee modules of the crack monitoring devices form a ZigBee ad hoc network, and each crack monitoring device further comprises:
the baffle is fixed on one side of the crack to be monitored by the crack monitoring device;
the contact is arranged opposite to the baffle;
the host machine shell is fixed on the other side of the crack, an accommodating cavity is formed inside the host machine shell, and a terminal ZigBee module of the crack monitoring device is arranged in the accommodating cavity;
the displacement sensor is used for measuring the distance between the contact and the baffle so as to reflect the width of the crack, is arranged in the accommodating cavity and is fixedly connected with the host, and is also connected with the contact;
and the terminal ZigBee module of each crack monitoring device is used for transmitting the distance to the ZigBee coordinator, and then transmitting the distance to an upper computer by the ZigBee coordinator.
2. The crack monitoring system of claim 1, wherein each crack monitoring device comprises a metal base plate fixed to the other side of the crack, the host housing comprises an upper housing and a lower housing, the receiving cavity comprises an upper cavity formed by the upper housing and a lower cavity formed by the lower housing, and the lower housing and the displacement sensor are fixed to the metal base plate.
3. The crack monitoring system of claim 2, wherein each crack monitoring device comprises a temperature sensor fixed on the metal base plate, and a terminal ZigBee module of each crack monitoring device is used for transmitting temperature information detected by the temperature sensor to the ZigBee coordinator and then transmitting the temperature information to an upper computer for temperature compensation.
4. The crack monitoring system of claim 3, wherein each crack monitoring device comprises a processing module, the processing module is disposed in the upper chamber and electrically connected to the displacement sensor and the temperature sensor, the processing module is configured to set an acquisition time interval, drive the displacement sensor and the temperature sensor to perform periodic measurement according to the acquisition time interval, drive the crack monitoring device into a sleep state at a measurement gap, and transmit the temperature information and the distance to a terminal ZigBee module of the crack monitoring device.
5. The fracture monitoring system of claim 4, wherein each of the fracture monitoring devices comprises an altimeter disposed in the upper chamber, and the processing module is configured to compare an altitude detected by the altimeter with a preset height and output a prompt when the difference is greater than a preset range.
6. The fracture monitoring system of claim 5, wherein the altitude meter has an accuracy of 0.05 meters.
7. The fracture monitoring system of claim 2, wherein each of the fracture monitoring devices comprises:
the displacement sensor is electrically connected with the interior of the upper cavity through the aviation terminal, and the aviation terminal is used for outputting measurement data;
and one end of the anti-falling device is connected with the aviation terminal, and the other end of the anti-falling device is connected with the surrounding box.
8. The fracture monitoring system of claim 1, wherein the displacement sensor is a grating sensor.
9. The fracture monitoring system of claim 8, wherein the grating sensor comprises:
a glass grating having a gap, connected to the contact;
the light source is arranged on one side of the glass grating;
the optical sensor is arranged on the other side of the glass grating;
and the decoder is used for decoding a signal formed by the light which is transmitted by the light source through the grating and irradiated on the light sensor.
10. The crack monitoring system of claim 1, comprising a total of 45 crack monitoring devices for monitoring the first 15 concrete cracks with a width of up to 0.3mm and a length of up to 1m or more, or a length of up to 10m or more, and 10 cracks around 3 gates of the containment of the nuclear power plant.
Priority Applications (1)
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| CN202022833420.1U CN213517949U (en) | 2020-12-01 | 2020-12-01 | Crack monitoring system |
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| CN202022833420.1U CN213517949U (en) | 2020-12-01 | 2020-12-01 | Crack monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323126A (en) * | 2021-12-20 | 2022-04-12 | 济南轨道交通集团有限公司 | Comprehensive detection and evaluation method for underground structure deformation joint diseases |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323126A (en) * | 2021-12-20 | 2022-04-12 | 济南轨道交通集团有限公司 | Comprehensive detection and evaluation method for underground structure deformation joint diseases |
| CN114323126B (en) * | 2021-12-20 | 2023-07-04 | 济南轨道交通集团有限公司 | Comprehensive detection and evaluation method for deformation joint diseases of underground structure |
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