Well lid monitoring method, device and system, medium and program product

Abstract

The invention provides a well lid monitoring method, device and system, a medium and a program product, and relates to the technical field of mobile communication. The method comprises the following steps: sending a first monitoring optical signal to a well lid signal acquisition device of a well lid through the monitoring unit of the OLT equipment; receiving a second monitoring optical signal reflected by a well lid signal acquisition device of the well lid through the monitoring unit of the OLT equipment; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through an optical fiber; determining a monitoring result of the well lid based on the second monitoring optical signal and a standard reflection monitoring optical signal; wherein the standard emission monitoring optical signal is an optical signal reflected when the well lid is in a normal state. By adopting the method provided by the embodiment of the invention, the well lid monitoring efficiency can be improved, the labor cost is reduced, and the applicability of the well lid monitoring method is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of mobile communication technology, and in particular to a manhole cover monitoring method, device, system, medium and program product. Background Art

[0002] In the related technology, with the rapid development of mobile communication services, cables are spread all over the country, and the cables are usually laid underground. In order to facilitate the transfer, inspection and maintenance of pipelines, a manhole or hand well is set up every hundred meters or so on the road, and an openable and movable manhole cover is provided on the well. In order to prevent the manhole cover from being damaged, lost or stolen, the manhole cover needs to be monitored. At present, manhole cover monitoring is usually carried out by manual inspection and surveillance, which makes the manhole cover monitoring method time-consuming and labor-intensive, with low monitoring efficiency and high labor costs. Summary of the invention

[0003] The present disclosure provides a manhole cover monitoring method, device, system, medium and program product. The technical solution of the present disclosure is as follows:

[0004] In a first aspect, the present disclosure provides a manhole cover monitoring method, which is applied to a manhole cover monitoring system, wherein the manhole cover monitoring system includes an OLT device, and the OLT device is provided with a monitoring unit. The manhole cover monitoring method includes:

[0005] Sending a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device;

[0006] The monitoring unit of the OLT device receives a second monitoring optical signal reflected by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through optical fibers;

[0007] Based on the second monitoring light signal and the standard reflected monitoring light signal, the monitoring result of the manhole cover is determined; wherein the standard transmitted monitoring light signal is the light signal reflected when the manhole cover is in a normal state.

[0008] In a possible implementation, there are multiple manhole covers, and the manhole cover signal collection device of each manhole cover reflects a second monitoring optical signal back to the monitoring unit;

[0009] The determining the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal includes:

[0010] Determine the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each of the second monitoring optical signals;

[0011] Based on the second monitoring light signal and the standard reflected monitoring light signal corresponding to each of the manhole covers, the monitoring result of each of the manhole covers is determined.

[0012] In a possible implementation, determining the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each of the second monitoring optical signals includes:

[0013] For a certain group of the first monitoring optical signal and the second monitoring optical signal, determining the total time from transmission to reception of the monitoring optical signal based on the transmission time of the first monitoring optical signal and the reception time of the second monitoring optical signal;

[0014] Calculate the distance between the manhole cover and the OLT device based on the propagation speed of light in a vacuum, the total time from emission to reception of the monitoring optical signal, and the refractive index of the optical fiber;

[0015] Based on the distance between the manhole cover and the OLT device, the manhole cover corresponding to the first monitoring optical signal and the second monitoring optical signal is determined.

[0016] In a possible implementation manner, determining the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal includes:

[0017] Acquire a standard optical power of the standard reflected monitoring optical signal and a second optical power of the second monitoring optical signal;

[0018] Calculating an optical power variation between the standard optical power and the second optical power;

[0019] The monitoring result of the manhole cover is determined based on the optical power change.

[0020] In a possible implementation manner, determining the monitoring result of the manhole cover based on the optical power variation includes:

[0021] Obtaining a preset change threshold value;

[0022] Determining whether the optical power variation is greater than or equal to the preset variation threshold value;

[0023] When the optical power variation is greater than or equal to the preset variation threshold value, it is determined that the monitoring state of the manhole cover is an abnormal state.

[0024] In a possible implementation manner, when the variation is greater than or equal to the preset variation threshold value, after determining that the monitoring state of the manhole cover is an abnormal state, the method further includes:

[0025] Output prompt information; wherein, the prompt information includes the manhole information corresponding to the manhole cover, and the manhole information includes one or more of the manhole identification, the manhole location, the manhole cover monitoring status, and the optical power change amount.

[0026] In a second aspect, the present disclosure provides a manhole cover monitoring device, comprising:

[0027] A signal sending module, used for sending a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device;

[0028] A signal receiving module, configured to receive, through the monitoring unit of the OLT device, a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted via optical fibers;

[0029] A monitoring module is used to determine the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal; wherein the standard transmitted monitoring optical signal is an optical signal emitted when the manhole cover is in a normal state.

[0030] In a third aspect, the present disclosure provides a manhole cover monitoring system, including an OLT device and a manhole cover signal acquisition device installed in a pipe well, wherein the OLT device is provided with a monitoring unit, and the monitoring unit includes a circulator, a data processing module, a laser module and a spectrum analysis module, wherein:

[0031] The monitoring unit of the OLT device is used for:

[0032] Transmitting a first monitoring optical signal through the laser module, wherein the first monitoring optical signal passes through the circulator and enters the optical fiber;

[0033] receiving, by the circulator, a second monitoring optical signal emitted by the tube well through the optical fiber, and transmitting the second monitoring optical signal to the spectrum analysis module;

[0034] Analyze and process the second monitoring optical signal through the spectrum analysis module to obtain optical power change data, and transmit the optical power change data to the data processing module;

[0035] The data processing module determines the monitoring result of the manhole cover based on the optical power change data.

[0036] In a fourth aspect, the present disclosure provides an electronic device, including:

[0037] processor;

[0038] a memory for storing instructions executable by the processor;

[0039] The processor is configured to execute the instructions to implement the method described in the first aspect.

[0040] In a fifth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0041] In a sixth aspect, the present disclosure provides a computer program product, comprising a computer program / instructions, characterized in that when the computer program / instructions are executed by a processor, the method described in the first aspect is implemented.

[0042] The technical solution disclosed in this disclosure brings at least the following beneficial effects:

[0043] In the embodiment of the present disclosure, it is applied to a manhole cover monitoring system, the manhole cover monitoring system includes an OLT device, the OLT device is provided with a monitoring unit, the manhole cover monitoring method, the monitoring unit of the OLT device sends a first monitoring optical signal to the manhole cover signal collection device of the manhole cover; the monitoring unit of the OLT device receives a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through optical fiber; based on the second monitoring optical signal and the standard reflected monitoring optical signal, the monitoring result of the manhole cover is determined; wherein the standard transmitted monitoring optical signal is an optical signal reflected when the manhole cover is in a normal state. In this way, the monitoring optical signal can be sent based on the monitoring unit of the OLT device and the monitoring optical signal reflected back by the manhole cover signal collection device is received, and the automatic monitoring of the manhole cover state is realized through the standard reflected monitoring optical signal and the received reflected optical signal, so that the efficiency of manhole cover monitoring can be effectively improved and the labor cost can be reduced; at the same time, by installing a monitoring unit on the original OLT device and setting a manhole cover signal collection device on the manhole cover, the deployment cost and difficulty of the manhole cover monitoring system can be reduced, and the applicability of the manhole cover monitoring method can be improved.

[0044] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0046] Figure 1 A flowchart of a manhole cover monitoring method provided by an embodiment of the present disclosure;

[0047] Figure 2 is a structural schematic diagram of a manhole cover monitoring system provided by an embodiment of the present disclosure;

[0048] Figure 3 is a structural diagram of an OLT device provided by an embodiment of the present disclosure;

[0049] Figure 4 is a structural schematic diagram of a monitoring unit provided by an embodiment of the present disclosure;

[0050] Figure 5 It is a structural schematic diagram of a manhole cover collection device provided by an embodiment of the present disclosure;

[0051] Figure 6 is a structural schematic diagram of a manhole cover monitoring device provided by an embodiment of the present disclosure;

[0052] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0055] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this disclosure are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0056] The acquisition, storage, use, and processing of data in the technical solution disclosed in this disclosure are in compliance with the relevant provisions of national laws and regulations.

[0057] It should be noted that in the embodiments of the present disclosure, there may be existing solutions in the industry such as certain software, components, models, etc., which should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present disclosure, but it does not mean that the applicant has or will necessarily use the solution.

[0058] In the related technology, with the rapid development of communication services, cables are spread all over the country, and in order to cater to the process of urbanization, most of these cables are laid underground. Therefore, various communication pipelines and cables are buried on roads in cities and villages. In order to facilitate the transfer, inspection and maintenance of pipelines, a manhole or hand well is set up every 100 meters on the road, and an openable and movable manhole cover is set on the well to ensure the normal communication of the cable. On the other hand, the manhole cover is also mainly used to cover the pipe well on the road to prevent people or objects from falling. At present, the number of manhole covers in each city is huge, and because these manhole covers are usually on the ground outdoors and are made of various materials, they are exposed to the ground outdoors for a long time and are subjected to external forces for a long time, and will be broken and damaged to varying degrees; also because the manhole covers have the characteristics of being openable and movable, some manhole covers are stolen by humans. However, the damage, loss or theft of manhole covers will not only cause damage to underground material facilities and the misuse or theft of pipeline resources, but also pose a serious threat to the driving safety of existing traffic vehicles and the travel safety of citizens and pedestrians. It not only causes economic losses to the country and the people, but also poses a great hidden danger to people's personal safety.

[0059] Therefore, there are two traditional ways to deal with the above-mentioned damage or theft of manhole covers on transmission pipelines. One is that the relevant maintenance unit arranges a large number of manpower to conduct regular inspections and surveillance; the other is to receive calls from the public reporting problems and then repair them on site. Faced with the current situation of a wide distribution range and huge number of manhole covers, these methods of checking whether there are any abnormalities in the manhole covers are very laborious and time-consuming, making it difficult to achieve real-time monitoring of the manhole covers, resulting in increased operating costs.

[0060] Based on this, there is also a method of using an electronic alarm system to monitor the safety of manhole covers in related technologies. However, this method has a system power supply problem. There are difficult-to-overcome technical problems with lithium battery power supply nearby or cable remote power supply. For example, the installation of information collection devices and lithium batteries is often difficult to adapt to the harsh environment such as humidity in the pipe well, and they are easily affected by moisture and aging. Remote power supply is difficult to set up and is more likely to be damaged. In addition, most of the existing SMS alarms, telephone line alarms, etc. use a single technology and do not form a distributed network monitoring effect. The maintenance difficulty and maintenance cost are high, and they cannot be used as an effective manhole cover monitoring solution.

[0061] Therefore, the embodiments of the present disclosure provide a method, device, system, medium and program product for monitoring a manhole cover, which can send a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device; receive a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through optical fiber; based on the second monitoring optical signal and the standard reflected monitoring optical signal, the monitoring result of the manhole cover is determined; wherein the standard transmitted monitoring optical signal is the optical signal reflected when the manhole cover is in a normal state. In this way, the monitoring optical signal can be sent based on the monitoring unit of the OLT device and the monitoring optical signal reflected back by the manhole cover signal collection device can be received, and the automatic monitoring of the manhole cover state can be realized through the standard reflected monitoring optical signal and the received reflected optical signal, so that the efficiency of manhole cover monitoring can be effectively improved and the labor cost can be reduced; at the same time, by installing a monitoring unit on the original OLT device and setting a manhole cover signal collection device on the manhole cover, the deployment cost and difficulty of the manhole cover monitoring system can be reduced, and the applicability of the manhole cover monitoring method can be improved.

[0062] The technical solutions provided by various embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0063] Figure 1 A flow chart of a manhole cover monitoring method provided in an embodiment of the present disclosure, which method can be applied to a manhole cover monitoring system, such as Figure 2 As shown, the manhole cover monitoring system may include an OLT (Optical Line Terminal) device and a manhole cover signal acquisition device installed in a pipe well. The OLT device is provided with a monitoring unit, which includes a circulator, a data processing module, a laser module and a spectrum analysis module, wherein:

[0064] The monitoring unit of the OLT equipment is used to:

[0065] The laser module emits a first monitoring optical signal, and the first monitoring optical signal passes through the circulator and enters the optical fiber;

[0066] The circulator receives the second monitoring optical signal transmitted back from the tube well through the optical fiber, and transmits the second monitoring optical signal to the spectrum analysis module;

[0067] Analyze and process the second monitoring optical signal through the spectrum analysis module to obtain optical power change data, and transmit the optical power change data to the data processing module;

[0068] The monitoring result of the manhole cover is determined based on the optical power change data through the data processing module.

[0069] In the embodiments of the present disclosure, Figure 2As shown, the manhole cover monitoring system mainly includes OLT equipment, a manhole cover signal collection device installed in the manhole, a transmission network and a network management computer. The transmission network is used to realize the network transmission between the OLT equipment and the network management computer. It can be understood that Figure 2 In the example, n pipe wells are taken as an example. In implementation, the number of pipe wells can be set according to actual conditions, and each pipe well is provided with a manhole cover signal acquisition device.

[0070] The OLT device in this embodiment is different from the OLT device in the related art. The OLT device is provided with a monitoring unit and belongs to a new type of OLT device. Figure 3 The OLT device includes a monitoring unit, a PON (Passive Optical Network) downlink unit, a PON uplink unit, a PON main control unit, etc. The monitoring unit can be in an external independent form, and establish a separate network management for monitoring; or, it can be built into the transmission equipment and share the network management network used by the original transmission equipment. As an example, the monitoring unit can be set up in the form of a built-in transmission device to reduce the additional deployment of network management monitoring. The monitoring optical signal emitted by the monitoring unit can be optically coupled with the main signal emitted by the OLT device before entering the transmission optical fiber, or it can be transmitted to the optical fiber in a separate manner.

[0071] Further integration Figure 4, the monitoring unit of the OLT device can occupy a slot width of the original OLT device, including a circulator, a data processing module, a laser module and a spectrum analysis module. Among them, the laser module is connected to the OLT device subframe through the backplane and draws power from the slot of the device subframe; the data processing module transmits communication information with the main control unit of the OLT device through the subframe backplane of the OLT device, and reports the monitoring information from the network management network of the reused original OLT to the network management computer. As an example, the laser module is used to emit a monitoring optical signal (that is, a first monitoring optical signal) for monitoring the manhole cover of the pipe well. As a specific example, different from the communication wavelength division used in the existing passive optical network, the wavelength range of the broadband light source used in this embodiment can be 1560nm-1620nm. One end of the circulator is connected to the laser module, and the other end of the circulator has an external interface connected to the core of the optical cable, and the third port of the circulator is connected to the spectrum analysis module. The main function of the circulator is to transmit the reflected optical signal (i.e., the second monitoring optical signal) through the third port (i.e., the channel to the spectrum analysis module) to achieve the separation of the emitted light and the reflected light. The spectrum analysis module can be built with an adjustable optical amplifier for amplifying the received weaker reflected optical signal (i.e., the second monitoring optical signal). The main function of the spectrum analysis module is to analyze the reflected optical signal. The data processing module can be used to process the power parameter variable of the reflected optical signal (i.e., the second monitoring optical signal), and analyze the change value of the optical power parameter (i.e., the optical power change data) by obtaining the optical power value of the reflected light (i.e., the second monitoring optical signal) at different distances from the pipe well, and combining the optical power change data with the theoretical optical power value to obtain the monitoring result of the manhole cover, and report the monitoring result to the network management computer through the transmission network management network.

[0072] The manhole cover collection device and the pipe well can be one-to-one. Figure 5 For a certain pipe well, one end of the manhole cover collection device is connected to the manhole cover of the pipe well, and the other end of the manhole cover collection device is connected to the bottom or wall of the pipe well. The optical fiber is coiled in the circle of the collection device, and the manhole cover collection device is made of elastic material to form a circle with a deformable spring in the middle. When the manhole cover is pulled up, the manhole cover collection device will deform, causing the radius of curvature of the optical fiber to deform, thereby causing the optical power of the monitored reflected light to change here; on the other hand, when the manhole cover is pressed down (damaged), the manhole cover collection device will also deform, causing the radius of curvature of the optical fiber to deform, thereby causing the optical power of the monitored reflected light to change here. Therefore, the deformation of the manhole cover collection device can be determined by monitoring the optical power change of the reflected light at the manhole cover, thereby realizing online monitoring of the manhole cover. It can be understood that the optical signal transmission between the monitoring unit and the manhole cover collection device can be realized by optical fiber, for example, the optical fiber type can include G.652 type optical fiber, G.655 type optical fiber, etc.

[0073] Combined with the above manhole cover monitoring system, Figure 1 As shown, the manhole cover monitoring method provided by the embodiment of the present disclosure may include the following steps:

[0074] S101, sending a first monitoring optical signal to a manhole cover signal collection device of a manhole cover through a monitoring unit of an OLT device.

[0075] In an embodiment of the present disclosure, when monitoring a manhole cover, a monitoring optical signal, i.e., a first monitoring optical signal, can be sent to a manhole cover signal collection device of the manhole cover through a monitoring unit of an OLT device. Exemplarily, the monitoring unit can emit the first monitoring optical signal through a laser module, and transmit it to the manhole cover signal collection device of the manhole cover via a circulator. It is understandable that the first monitoring optical signal can be transmitted to the manhole cover signal collection device through an optical fiber.

[0076] S102: Receive, through the monitoring unit of the OLT device, a second monitoring optical signal reflected by a manhole cover signal collection device of the manhole cover.

[0077] In the embodiments of the present disclosure, after the manhole cover signal collection device of the manhole cover receives the first monitoring optical signal, if the manhole cover is pulled up or pressed down (damaged), the manhole cover signal collection device will be deformed, causing the optical disk in the manhole cover signal collection device to be deformed, thereby causing the radius of curvature of the optical fiber to change, which will cause the reflection of the first monitoring optical signal here to change the optical power, and obtain the reflected monitoring optical signal, that is, the second monitoring optical signal. The manhole cover signal collection device of the manhole cover can transmit the second monitoring optical signal to the monitoring unit of the OLT device through the optical fiber, for example, transmit the second monitoring optical signal to the circulator through the optical fiber, and transmit it to the spectrum analysis module and the data processing module via the circulator, and the spectrum analysis module and the data processing module perform subsequent processing.

[0078] S103, determining a monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal.

[0079] Among them, the standard emission monitoring light signal is the light signal reflected when the manhole cover is in a normal state.

[0080] In an embodiment of the present disclosure, after the monitoring unit of the OLT device receives the second monitoring optical signal reflected back by the manhole cover signal acquisition device of the manhole cover, it can obtain the standard reflected monitoring optical signal reflected when the manhole cover is in a normal state. Then, analysis and processing are performed based on the second monitoring optical signal and the standard reflected monitoring optical signal, and the monitoring result of the manhole cover is determined based on the analysis result. Exemplarily, the monitoring result of the manhole cover can be determined based on the change data of the second monitoring optical signal and the standard reflected monitoring optical signal. The monitoring result can be, for example, that the manhole cover is in a normal state or that the manhole cover is in an abnormal state. The abnormal state of the manhole cover can be optionally set to be a damaged manhole cover, a lost manhole cover, etc.

[0081] It is understandable that there may be one or more manhole covers. If there are multiple manhole covers, the above manhole cover monitoring method may be performed on the multiple manhole covers in parallel.

[0082] In the embodiment of the present disclosure, it is applied to a manhole cover monitoring system, the manhole cover monitoring system includes an OLT device, the OLT device is provided with a monitoring unit, the manhole cover monitoring method, the monitoring unit of the OLT device sends a first monitoring optical signal to the manhole cover signal collection device of the manhole cover; the monitoring unit of the OLT device receives a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through optical fiber; based on the second monitoring optical signal and the standard reflected monitoring optical signal, the monitoring result of the manhole cover is determined; wherein the standard transmitted monitoring optical signal is an optical signal reflected when the manhole cover is in a normal state. In this way, the monitoring optical signal can be sent based on the monitoring unit of the OLT device and the monitoring optical signal reflected back by the manhole cover signal collection device is received, and the automatic monitoring of the manhole cover state is realized through the standard reflected monitoring optical signal and the received reflected optical signal, so that the efficiency of manhole cover monitoring can be effectively improved and the labor cost can be reduced; at the same time, by installing a monitoring unit on the original OLT device and setting a manhole cover signal collection device on the manhole cover, the deployment cost and difficulty of the manhole cover monitoring system can be reduced, and the applicability of the manhole cover monitoring method can be improved.

[0083] In some possible implementations, if there are multiple manhole covers, the manhole cover signal collection device of each manhole cover reflects a second monitoring optical signal back to the monitoring unit; accordingly, based on the second monitoring optical signal and the standard reflected monitoring optical signal, the monitoring result of the manhole cover is determined, including:

[0084] Determine the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each second monitoring optical signal;

[0085] Based on the second monitoring light signal corresponding to each manhole cover and the standard reflected monitoring light signal, the monitoring result of each manhole cover is determined.

[0086] In the disclosed embodiment, if there are multiple manhole covers, it is necessary to distinguish different manhole covers by the distance between the manhole cover and the OLT device to determine the monitoring result of each manhole cover. Taking into account the different distances between different manhole covers and the OLT device, the propagation time of the optical signal is also different. Therefore, different manhole covers can be distinguished according to the propagation time of the optical signal. Exemplarily, the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal can be determined based on the sending time of the first monitoring optical signal and the receiving time of the second monitoring optical signal. Then, the monitoring result of each manhole cover is determined based on the second monitoring optical signal and the standard reflected monitoring optical signal corresponding to each manhole cover. In this way, the monitoring of multiple different manhole covers can be achieved, thereby improving the monitoring efficiency.

[0087] In a further possible implementation, determining the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each second monitoring optical signal includes:

[0088] For a certain group of the first monitoring optical signal and the second monitoring optical signal, determining the total time from the transmission to the reception of the monitoring optical signal based on the transmission time of the first monitoring optical signal and the reception time of the second monitoring optical signal;

[0089] Calculate the distance between the manhole cover and the OLT device based on the propagation speed of light in a vacuum, the total time from the emission to the reception of the monitored optical signal, and the refractive index of the optical fiber;

[0090] Based on the distance between the manhole cover and the OLT device, the manhole cover corresponding to the first monitoring optical signal and the second monitoring optical signal is determined.

[0091] In the disclosed embodiment, for a certain group of first monitoring light signals and second monitoring light signals, that is, for a certain manhole cover, the sending time of the first monitoring light signal and the receiving time of the second monitoring light signal corresponding to the manhole cover can be obtained, and based on the sending time of the first monitoring light signal and the receiving time of the second monitoring light signal corresponding to the manhole cover, the total time from the emission to the reception of the monitoring light signal, that is, the total time consumed, can be calculated. Then, based on the propagation speed of light in a vacuum, the total time from the emission to the reception of the monitoring light signal, and the refractive index of the optical fiber, the distance between the manhole cover and the OLT device can be calculated, and the calculation formula can refer to formula (1). Then, based on the distance between the manhole cover and the OLT device, different manholes and manhole covers can be distinguished, and the manhole cover corresponding to each group of the first monitoring light signal and the second monitoring light signal can be determined. In this way, accurate data basis can be provided for subsequent manhole cover monitoring.

[0092] d=(c*t) / (2*n) (1)

[0093] Wherein, c represents the propagation speed of light in vacuum; t is the total time from pulse emission to reception (round trip), that is, the total time from emission to reception of the monitoring optical signal; and n is the refractive index of the optical fiber.

[0094] In some possible implementations, determining the monitoring result of the manhole cover based on the second monitoring light signal and the standard reflected monitoring light signal includes:

[0095] Acquire a standard optical power of a standard reflected monitoring optical signal and a second optical power of a second monitoring optical signal;

[0096] Calculating an optical power variation between a standard optical power and a second optical power;

[0097] The monitoring result of the manhole cover is determined based on the change in optical power.

[0098] In the disclosed embodiment, when determining the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal, the optical power of the standard reflected monitoring optical signal, that is, the standard optical power, can be obtained; and the optical power of the second monitoring optical signal, that is, the second optical power, can be obtained. Then, the optical power variation between the standard optical power of the standard reflected monitoring optical signal and the second optical power of the second monitoring optical signal can be calculated, and then the monitoring result of the manhole cover can be determined based on the optical power variation between the standard optical power and the second optical power. In this way, real-time online monitoring of the manhole cover can be achieved based on the power variation between the emitted light and the reflected light.

[0099] In a further possible implementation, determining the monitoring result of the manhole cover based on the optical power variation includes:

[0100] Obtaining a preset change threshold value;

[0101] Determine whether the optical power variation is greater than or equal to a preset variation threshold value;

[0102] When the optical power variation is greater than or equal to a preset variation threshold value, it is determined that the monitoring state of the manhole cover is an abnormal state.

[0103] In the disclosed embodiment, the state of the manhole cover can be determined by a threshold comparison method. Exemplarily, a preset change threshold value can be obtained, and the preset change threshold value can be set according to experience or historical data, or can also be set according to actual conditions. The preset change threshold value is then compared with the optical power change to determine whether the optical power change is greater than or equal to the preset change threshold value. If the optical power change is greater than or equal to the preset change threshold value, the monitoring state of the manhole cover is considered to be an abnormal state, and the abnormal state may further include damage, loss, and the like. Conversely, if the optical power change is less than the preset change threshold value, the manhole cover can be considered to be in a normal state.

[0104] In some possible implementations, when the variation is greater than or equal to a preset variation threshold value, after determining that the monitoring state of the manhole cover is an abnormal state, the method further includes:

[0105] Output prompt information; wherein the prompt information includes the manhole information corresponding to the manhole cover, and the manhole information includes one or more of the manhole identification, the manhole location, the manhole cover monitoring status, and the optical power change.

[0106] In the embodiment of the present disclosure, if the optical power variation is greater than or equal to the preset variation threshold value, that is, the monitoring state of the manhole cover is abnormal, a prompt message may be output, and the prompt message may include, for example, the pipe well information corresponding to the manhole cover, and the pipe well information includes one or more of the pipe well identification, pipe well location, manhole cover monitoring state, and optical power variation. Exemplarily, the prompt message may be reported to a network management computer, which ultimately displays the specific pipe well information in the form of graphics, data, sound, etc., and makes a corresponding pipe well alarm to notify maintenance personnel.

[0107] In order to make the manhole cover monitoring method provided by the embodiment of the present disclosure clearer, a specific example is provided below for explanation.

[0108] The manhole cover monitoring method provided by the embodiment of the present disclosure involves a new type of OLT device that is upgraded and reconstructed by means of a built-in monitoring board unit on the basis of the original OLT device. The monitoring unit communicates quickly with the main control unit of the OLT device through the backplane bus of the original OLT device, which effectively solves the deployment problem of the monitoring network management. Under normal circumstances, the monitoring optical signal emitted by the monitoring unit is transmitted along the pipe wells of the road. A manhole cover signal collection device is installed at each position where a pipe well is passed, and distributed deployment is performed along the line. The manhole cover signal collection device at each pipe well will reflect the information of the change in the power of the optical signal. The monitoring unit compares the feedback optical signal power information with the reflected optical signal power information under normal circumstances, and finally determines whether the change in the reflected optical power of each pipe well exceeds the gate threshold. The information is then displayed in the form of graphics, data, sound, etc. through the OLT transmission network management network and reported to the network management computer, so that the manhole cover can be monitored online without manual inspections during the entire process. Specifically, the following steps may be included:

[0109] Step 1: Install the monitoring unit on the OLT device.

[0110] Step 2: Install a manhole cover signal acquisition device in the pipe wells along the line (pipe well 1, pipe well 2, ...).

[0111] Step 3: The monitoring optical signal (first monitoring optical signal) emitted by the monitoring unit passes through the circulator and then enters the core of the optical cable.

[0112] Step 4: The monitoring light is transmitted to the manhole cover signal collection devices of different pipe wells at different times.

[0113] It should be noted that different manholes are distinguished by the different distances between the manhole and the OLT device. The optical signals emitted by the monitoring light can be returned at different times to determine different measurement distances, thereby distinguishing different manholes and realizing simultaneous online monitoring of multiple manholes. The distance calculation formula between the manhole cover and the OLT device can refer to formula (1).

[0114] Step 5: Under normal circumstances, the monitoring optical signal (second monitoring optical signal) reflected from each tube well will enter the spectrum analysis module through the circulator.

[0115] Step 6: The spectrum analysis module analyzes various reflection events of the reflected light, thereby forming a light power gradient curve in the spectrum analysis module.

[0116] Step 7: The data processing module compares the optical power at the distance of each pipe well with the standard optical power, that is, compares the first optical power of the first monitoring optical signal with the second optical power of the second monitoring optical signal, and determines the change in the optical power in each pipe well. The change in optical power is compared with the preset change threshold value, and the optical power change exceeding the preset change threshold value is reported to the network management computer.

[0117] Step 8: The network management computer finally displays the information of the specific pipe well in the form of graphics, data, sound, etc., and makes corresponding pipe well alarms according to the preset optical power to notify the maintenance personnel.

[0118] At this point, the online real-time and accurate monitoring of the manhole cover is completed.

[0119] It can be seen that the manhole cover monitoring method provided by the present disclosure proposes a new type of OLT device, which can be equipped with a monitoring unit on the basis of the original OLT device. The installed monitoring unit is powered by the sub-frame of the original OLT device, and communicates with the original main control unit of the OLT device through the back of the sub-frame, which effectively solves the problem of transmitting network management information and reduces the deployment cost and difficulty of the system. At the same time, the manhole cover monitoring system uses a purely passive optical fiber device for monitoring the manhole covers of the pipe well, which effectively avoids the difficulty of power supply to the pipe well and copes with the harsh environment such as humidity and temperature in the pipe well, making up for the current shortcomings of manhole cover monitoring. In addition, the manhole cover monitoring system can form a distributed monitoring effect, and can perform distributed monitoring of multiple manhole covers along the line, effectively solving the problem of manhole cover monitoring efficiency.

[0120] The specific implementation and technical effects of each step of this embodiment are similar to those of the above method embodiments, and will not be repeated here.

[0121] Based on the same inventive concept, the present disclosure also provides a manhole cover monitoring device. Figure 6 As shown, the manhole cover monitoring device 600 includes:

[0122] A signal sending module 610, configured to send a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device;

[0123] A signal receiving module 620 is configured to receive, through the monitoring unit of the OLT device, a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted via optical fibers;

[0124] The monitoring module 630 is used to determine the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal; wherein the standard transmitted monitoring optical signal is an optical signal emitted when the manhole cover is in a normal state.

[0125] In a possible implementation, there are multiple manhole covers, and the manhole cover signal collection device of each manhole cover reflects a second monitoring optical signal back to the monitoring unit;

[0126] The monitoring module 630 includes:

[0127] a manhole cover determination unit, configured to determine the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each of the second monitoring optical signals;

[0128] The first monitoring unit is used to determine the monitoring result of each manhole cover based on the second monitoring light signal and the standard reflection monitoring light signal corresponding to each manhole cover.

[0129] In a possible implementation manner, the manhole cover determination unit is used to:

[0130] For a certain group of the first monitoring optical signal and the second monitoring optical signal, determining the total time from transmission to reception of the monitoring optical signal based on the transmission time of the first monitoring optical signal and the reception time of the second monitoring optical signal;

[0131] Calculate the distance between the manhole cover and the OLT device based on the propagation speed of light in a vacuum, the total time from emission to reception of the monitoring optical signal, and the refractive index of the optical fiber;

[0132] Based on the distance between the manhole cover and the OLT device, the manhole cover corresponding to the first monitoring optical signal and the second monitoring optical signal is determined.

[0133] In a possible implementation, the monitoring module 630 includes:

[0134] A power acquisition unit, which acquires a standard optical power of the standard reflected monitoring optical signal and a second optical power of the second monitoring optical signal;

[0135] A calculation unit, used for calculating the optical power variation between the standard optical power and the second optical power;

[0136] The second monitoring unit is used to determine the monitoring result of the manhole cover based on the optical power change.

[0137] In a possible implementation manner, the second monitoring unit is used to:

[0138] Obtaining a preset change threshold value;

[0139] Determining whether the optical power variation is greater than or equal to the preset variation threshold value;

[0140] When the optical power variation is greater than or equal to the preset variation threshold value, it is determined that the monitoring state of the manhole cover is an abnormal state.

[0141] In a possible implementation, the manhole cover monitoring device 600 further includes:

[0142] A prompt module is used to output prompt information; wherein the prompt information includes the manhole information corresponding to the manhole cover, and the manhole information includes one or more of the manhole identification, the manhole location, the manhole cover monitoring status, and the optical power change.

[0143] The specific implementation method and technical effect of the device provided in the embodiment of the present disclosure are similar to those of the above-mentioned method embodiment, and will not be repeated here.

[0144] According to an embodiment of the present disclosure, the present disclosure also discloses an electronic device, a computer-readable storage medium, and a computer program product.

[0145] Figure 7 A schematic block diagram of an example electronic device 700 that can be used to implement an embodiment of the present disclosure is shown. The electronic device 700 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0146] like Figure 7 As shown, the electronic device 700 includes a computing unit 701, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 702 or a computer program loaded from a storage unit 708 into a random access memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the device 700 can also be stored. The computing unit 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0147] Multiple components in the electronic device 700 are connected to the I / O interface 705, including: an input unit 706, such as a keyboard, a mouse, etc.; an output unit 707, such as various types of displays, speakers, etc.; a storage unit 708, such as a disk, an optical disk, etc.; and a communication unit 709, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 709 allows the electronic device 700 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0148] The computing unit 701 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 701 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 701 performs the various methods and processes described above, such as the manhole cover monitoring method. For example, in some embodiments, the manhole cover monitoring method may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 708. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 700 via the ROM 702 and / or the communication unit 709. When the computer program is loaded into the RAM 703 and executed by the computing unit 701, one or more steps of the manhole cover monitoring method described above may be performed. Alternatively, in other embodiments, the computing unit 701 may be configured to perform the manhole cover monitoring method in any other appropriate manner (e.g., by means of firmware).

[0149] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0150] The program code of the computer program product for implementing the method of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0151] In the context of the present disclosure, a computer-readable storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may be a machine-readable signal medium or a machine-readable storage medium. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a computer-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0152] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0153] The systems and techniques described herein can be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), the Internet, and a blockchain network.

[0154] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or "VPS" for short). The server may also be a server of a distributed system, or a server combined with a blockchain.

[0155] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0156] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A manhole cover monitoring method, characterized in that: Applied to a manhole cover monitoring system, the manhole cover monitoring system includes an OLT device, the OLT device is provided with a monitoring unit, and the manhole cover monitoring method includes: Sending a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device; The monitoring unit of the OLT device receives a second monitoring optical signal reflected by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted through optical fibers; Based on the second monitoring light signal and the standard reflected monitoring light signal, the monitoring result of the manhole cover is determined; wherein the standard transmitted monitoring light signal is the light signal reflected when the manhole cover is in a normal state.

2. The manhole cover monitoring method according to claim 1, characterized in that: There are multiple manhole covers, and the manhole cover signal collection device of each manhole cover reflects a second monitoring optical signal back to the monitoring unit; The determining the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal includes: Determine the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each of the second monitoring optical signals; Based on the second monitoring light signal and the standard reflected monitoring light signal corresponding to each of the manhole covers, the monitoring result of each of the manhole covers is determined.

3. The manhole cover monitoring method according to claim 1, characterized in that: The method of determining the manhole cover corresponding to each group of the first monitoring optical signal and the second monitoring optical signal based on the sending time of the first monitoring optical signal and the receiving time of each second monitoring optical signal includes: For a certain group of the first monitoring optical signal and the second monitoring optical signal, determining the total time from transmission to reception of the monitoring optical signal based on the transmission time of the first monitoring optical signal and the reception time of the second monitoring optical signal; Calculate the distance between the manhole cover and the OLT device based on the propagation speed of light in a vacuum, the total time from emission to reception of the monitoring optical signal, and the refractive index of the optical fiber; Based on the distance between the manhole cover and the OLT device, the manhole cover corresponding to the first monitoring optical signal and the second monitoring optical signal is determined.

4. The manhole cover monitoring method according to claim 1, characterized in that: The determining the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal includes: Acquire a standard optical power of the standard reflected monitoring optical signal and a second optical power of the second monitoring optical signal; Calculating an optical power variation between the standard optical power and the second optical power; The monitoring result of the manhole cover is determined based on the optical power change.

5. The method for monitoring a manhole cover according to claim 4, characterized in that: The determining the monitoring result of the manhole cover based on the optical power variation includes: Obtaining a preset change threshold value; Determining whether the optical power variation is greater than or equal to the preset variation threshold value; When the optical power variation is greater than or equal to the preset variation threshold value, it is determined that the monitoring state of the manhole cover is an abnormal state.

6. The method for monitoring a manhole cover according to claim 5, characterized in that: After determining that the monitoring state of the manhole cover is an abnormal state when the change amount is greater than or equal to the preset change amount threshold value, the method further includes: Output prompt information; wherein, the prompt information includes the manhole information corresponding to the manhole cover, and the manhole information includes one or more of the manhole identification, the manhole location, the manhole cover monitoring status, and the optical power change amount.

7. A manhole cover monitoring device, characterized in that: include: A signal sending module, used for sending a first monitoring optical signal to a manhole cover signal collection device of the manhole cover through the monitoring unit of the OLT device; A signal receiving module, configured to receive, through the monitoring unit of the OLT device, a second monitoring optical signal reflected back by the manhole cover signal collection device of the manhole cover; wherein the first monitoring optical signal and the second monitoring optical signal are transmitted via optical fibers; A monitoring module is used to determine the monitoring result of the manhole cover based on the second monitoring optical signal and the standard reflected monitoring optical signal; wherein the standard transmitted monitoring optical signal is an optical signal emitted when the manhole cover is in a normal state.

8. A manhole cover monitoring system, characterized in that: It includes an OLT device and a manhole cover signal collection device installed in a pipe well. The OLT device is provided with a monitoring unit. The monitoring unit includes a circulator, a data processing module, a laser module and a spectrum analysis module, wherein: The monitoring unit of the OLT device is used to: Transmitting a first monitoring optical signal through the laser module, wherein the first monitoring optical signal passes through the circulator and enters the optical fiber; receiving, by the circulator, a second monitoring optical signal emitted by the tube well through the optical fiber, and transmitting the second monitoring optical signal to the spectrum analysis module; Analyze and process the second monitoring optical signal through the spectrum analysis module to obtain optical power change data, and transmit the optical power change data to the data processing module; The monitoring result of the manhole cover is determined by the data processing module based on the optical power change data.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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