Well lid intelligent comprehensive monitoring system and method

Abstract

The invention relates to the related field of municipal intelligent management, and discloses an intelligent comprehensive monitoring system and method for a well lid, and the system effectively recognizes the damage of the well lid through the setting of related sensing equipment and data processing, by utilizing a multi-factor comprehensive analysis method, and in combination with the opening and closing state of the well lid and the liquid level state in the well. The false alarm rate of manhole cover damage is greatly reduced, and meanwhile, the remaining time of rising of the liquid level in the well to the manhole cover is predicted through a multivariate function curve fitting tool, so that related management personnel and inspection personnel can quickly judge the emergency degree of accident handling and make a response accordingly; through mutual coupling of three monitoring functions of a well lid opening and closing state, a well liquid level state and a well lid integrity state, further linkage verification is realized in a process of judging whether a single monitoring function of a matched platform is abnormal or not, and the false alarm rate of the whole system is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field related to municipal intelligent management, and specifically to an intelligent comprehensive monitoring system and method for manhole covers. Background Art

[0002] In the city's infrastructure, municipal, communications, gas, electricity and other departments have a large number of complex underground pipe network layouts. Therefore, various types of manhole cover equipment will be installed on the ground in the city. Under long-term natural factors such as wind and sun, coupled with various human factors such as vehicle rolling, project construction, etc., the ground manhole covers usually encounter problems such as damage, tilt, displacement and loss. On the other hand, in heavy rain weather or when the drainage network is blocked, the liquid level of sewage wells or rainwater wells often rises abnormally, and there is even a risk of overflow; and for some water supply wells, cable wells, etc., sometimes burst pipes, groundwater leakage, etc. will occur, causing water to enter the well. Therefore, the manhole cover equipment on the road needs to be regularly maintained and managed. If it is not properly supervised and maintained, it is very easy to bring serious safety hazards to pedestrians and vehicles on the road, and once an accident occurs, it will inevitably cause irreparable losses.

[0003] Existing manhole cover movement and liquid level monitoring often use two separate modules for detection. Manhole cover movement monitoring mainly uses a dual-axis tilt sensor, and liquid level monitoring mainly uses an ultrasonic sensor to achieve early warning, increase response time, and minimize losses. In some solutions, liquid level monitoring uses a water immersion sensor, but this sensor can only issue an alarm after being soaked in water. It is impossible to collect water level information in the well in real time, resulting in missing the best emergency response time period. In addition, due to hardware and software limitations, current products often have a high false alarm rate, which increases the burden on operation and maintenance personnel. Summary of the invention

[0004] The purpose of the present invention is to provide a manhole cover intelligent comprehensive monitoring system and method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An intelligent comprehensive monitoring system for manhole covers, comprising:

[0007] An initial maintenance module, used to update the database after deployment is completed. The database update includes initialization update and regular update. The initialization update is used to set the initial and related project parameters. The regular update is executed in a preset periodic cycle.

[0008] An opening and closing determination module is used to obtain a contact electrical signal, and to determine the opening and closing state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has an abnormal movement and separation event, and a corresponding abnormal movement and separation determination result is generated;

[0009] The liquid level determination module is used to obtain the liquid level detection data sent back by the ultrasonic liquid level sensor, fit the liquid level trend based on the continuous liquid level detection data on the time axis, and make a coordinated determination based on the contact electrical signal to generate a corresponding liquid level abnormality determination result;

[0010] The damage judgment module is used to obtain the light sensing data sent back by the light sensor and perform historical peak value judgment on the continuous light sensing data. If all of them exceed the historical peak value, a coordinated judgment is performed with the contact electrical signal to generate a corresponding manhole cover damage judgment result;

[0011] The monitoring feedback module is used to generate feedback alarms based on multiple judgment results, obtain the manhole cover number and location information corresponding to the feedback alarm, and push it to the management terminal through the platform.

[0012] As a further solution of the present invention: the damage determination module includes:

[0013] A data management unit is used to collect the light intensity value in the well through the light sensor data sent back by the light sensor and store it in the light reference database, with one week as the storage cycle;

[0014] A preprocessing unit is used to encode and group the light sensor data to obtain arrays Ld ij and Ln ij , Ld is used to represent day data, Ln is used to represent night data, i is used to represent the number of days, and j is used to represent the jth data of each day;

[0015] Eigenvalue unit, used to calculate the daily data mean Ld avg and night data mean Ln avg ,

[0016]

[0017] The maximum value of the light sensing data is taken, and the maximum value is characterized by:

[0018] L max =MAX(MAX(L 11 :L 1k ), MAX(L 21 :L 2k ), ..., MAX(L 71 :L 7k ),).

[0019] As a further solution of the present invention: the liquid level determination module includes:

[0020] Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data;

[0021] The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is:

[0022]

[0023] Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, and the ΔTr i Used to characterize changing trends.

[0024] As a further solution of the present invention: the opening and closing determination module includes:

[0025] A cyclic monitoring unit, used for indicating that the manhole cover is in a closed state when a contact electrical signal is detected, and at this time, a detection procedure of the contact electrical signal is cyclically executed;

[0026] The angle calculation unit is used to start the liquid level sensor when no contact electrical signal is detected, collect the liquid level data in the well at a preset time interval, and calculate the manhole cover opening angle based on the liquid level data in the well:

[0027]

[0028] Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears;

[0029] The abnormality judgment unit is used to judge the opening angle of the manhole cover. If θ is less than 15°, continuous angle data monitoring and evaluation is performed. If θ is greater than or equal to 15°, an abnormal movement and separation judgment result is generated.

[0030] As a further solution of the present invention: the damage determination module further includes:

[0031] The damage judgment unit is used to judge whether the manhole cover is damaged. i >L max , i=1,2,3}∪L i >L avg , i=1,2,3,4,5,6}, then the manhole cover is judged to be damaged,

[0032] The damage verification unit is used to make a coordinated judgment based on the contact electrical signal. If there is no contact electrical signal, it is inferred that the manhole cover is open based on the platform's historical data. If there is a contact electrical signal, a manhole cover damage judgment result is generated.

[0033] The embodiment of the present invention aims to provide a method for intelligent comprehensive monitoring of manhole covers, comprising:

[0034] After the deployment is completed, the database is updated. The database update includes initialization update and periodic update. The initialization update is used to set the initial and related project parameters. The periodic update is performed in a preset periodic cycle.

[0035] Acquire a contact electrical signal, and determine the open / closed state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has an abnormal movement and separation event, and a corresponding abnormal movement and separation determination result is generated;

[0036] The liquid level detection data transmitted back by the ultrasonic liquid level sensor is obtained, the liquid level trend is fitted based on the continuous liquid level detection data on the time axis, and a coordinated judgment is made based on the contact electrical signal to generate a corresponding liquid level abnormality judgment result;

[0037] Obtain the light sensing data sent back by the light sensor, and make a historical peak judgment on the continuous light sensing data. If all of them exceed the historical peak value, make a coordinated judgment with the contact electrical signal to generate a corresponding manhole cover damage judgment result;

[0038] Based on multiple determination results, feedback alarms are generated accordingly, the manhole cover number and location information corresponding to the feedback alarms are obtained, and pushed to the management terminal through the platform.

[0039] As a further solution of the present invention: the step of obtaining the light sensor data transmitted back by the light sensor and performing historical peak value judgment on the continuous light sensor data includes:

[0040] The light sensor data sent back by the light sensor collects the light intensity value in the well and stores it in the light reference database, with a storage cycle of one week;

[0041] The light sensing data is encoded and grouped to obtain arrays and The Ld is used to represent the day data, the Ln is used to represent the night data, the i is used to represent the number of days, and the j is used to represent the jth data of each day;

[0042] Calculate the daily data mean and night data average Said

[0043]

[0044] The maximum value of the light sensing data is taken, and the maximum value is characterized by:

[0045]

[0046] As a further solution of the present invention: the step of acquiring the liquid level detection data transmitted back by the ultrasonic liquid level sensor and fitting the liquid level trend based on the continuous liquid level detection data on the time axis includes:

[0047] Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data;

[0048] The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is:

[0049]

[0050] Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, Used to characterize changing trends.

[0051] As a further solution of the present invention: the step of generating the abnormal movement and separation determination result specifically includes:

[0052] When the contact electrical signal is detected, it indicates that the manhole cover is in a closed state, and at this time, the contact electrical signal detection program is executed cyclically;

[0053] When no contact electrical signal is detected, the liquid level sensor is started, and the liquid level data in the well is collected at a preset time interval, and the manhole cover opening angle is calculated based on the liquid level data in the well:

[0054]

[0055] Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears;

[0056] The manhole cover opening angle is judged. If θ<15°, continuous angle data monitoring and evaluation is performed. If θ≥15°, an abnormal separation judgment result is generated.

[0057] As a further solution of the present invention: the historical peak value judgment is performed on the continuous light sensor data. If all of them exceed the historical peak value, the step of performing a coordinated judgment with the contact electrical signal, and the corresponding step of generating the manhole cover damage judgment result specifically includes:

[0058] Determine whether the manhole cover is damaged. If {L i >L max , i=1,2,3}∪{L i >L avg , i=1,2,3,4,5,6}, then the manhole cover is judged to be damaged,

[0059] Perform collaborative judgment on the contact electrical signal. If there is no contact electrical signal, combine the platform's historical data to infer that the manhole cover is open. If there is a contact electrical signal, generate a manhole cover damage judgment result.

[0060] Compared with the prior art, the beneficial effects of the present invention are: through the setting and data processing of relevant sensing equipment, the use of a multi-factor comprehensive analysis method, combined with the opening and closing status of the manhole cover and the liquid level status in the well, the occurrence of manhole cover damage can be effectively identified, which greatly reduces the false alarm rate of manhole cover damage. At the same time, through the multivariate function curve fitting tool, the remaining time for the liquid level in the well to rise to the manhole cover is predicted, which helps relevant management personnel and inspection personnel to quickly judge the urgency of accident handling and respond accordingly; through the mutual coupling of the three monitoring functions of the opening and closing status of the manhole cover, the liquid level status in the well and the integrity status of the manhole cover, in the process of judging whether an abnormality occurs in a single monitoring function of the supporting platform, further linkage verification is achieved, which greatly reduces the false alarm rate of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 The present invention is a block diagram of the composition of a manhole cover intelligent comprehensive monitoring system.

[0062] Figure 2 The present invention is a flowchart of a method for intelligent comprehensive monitoring of manhole covers.

[0063] Figure 3 The figure is a schematic diagram of the structural coordination of an intelligent integrated monitoring device for manhole covers.

[0064] Figure 4 The figure is a schematic diagram of the partial structure of an intelligent comprehensive monitoring device for manhole covers.

[0065] In the attached drawings: 1-manhole cover, 2-fixing bolt, 3-suspension base, 31-suspension base body, 32-suspension base fixing nut, 33-contact, 34-signal line, 4-spherical hinge joint, 41-spherical hinge joint body, 42-conductive ring, 43-spherical hinge joint fixing joint, 5-counterweight, 6-ultrasonic liquid level sensor, 7-illuminance sensor, 8-control component, 9-antenna. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0067] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0068] like Figure 1The above-mentioned is a manhole cover intelligent comprehensive monitoring system provided by one embodiment of the present invention, comprising:

[0069] The initial maintenance module 100 is used to update the database after the deployment is completed. The database update includes initialization update and periodic update. The initialization update is used to set the initial and related project parameters. The periodic update is performed in a preset periodic cycle.

[0070] The opening and closing determination module 200 is used to obtain the contact electrical signal, and determine the opening and closing state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has an abnormal movement and separation event, and a corresponding abnormal movement and separation determination result is generated;

[0071] The liquid level determination module 300 is used to obtain the liquid level detection data transmitted back by the ultrasonic liquid level sensor, perform liquid level trend fitting based on the continuous liquid level detection data on the time axis, and perform collaborative determination based on the contact electrical signal, and generate a corresponding liquid level abnormality determination result;

[0072] The damage determination module 400 is used to obtain the light sensing data transmitted back by the light sensor, and to perform historical peak value determination on the continuous light sensing data. If all of the data exceed the historical peak value, the data is coordinated with the contact electrical signal to generate a corresponding manhole cover damage determination result.

[0073] The monitoring feedback module 500 is used to generate feedback alarms based on multiple determination results, obtain the manhole cover number and location information corresponding to the feedback alarm, and push them to the management terminal through the platform.

[0074] In the present embodiment, an intelligent comprehensive monitoring system for manhole covers is provided. Through the setting and data processing of relevant sensor equipment, a multi-factor comprehensive analysis method is used, combined with the manhole cover opening and closing status and the liquid level status in the well, the occurrence of manhole cover damage can be effectively identified, which greatly reduces the false alarm rate of manhole cover damage. At the same time, through the multivariate function curve fitting tool, the remaining time for the liquid level in the well to rise to the manhole cover is predicted, which helps relevant management personnel and inspection personnel to quickly judge the urgency of accident handling and respond accordingly; through the mutual coupling of the three monitoring functions of the manhole cover opening and closing status, the liquid level status in the well and the integrity status of the manhole cover, further linkage verification is achieved in the process of judging whether an abnormality occurs in a single monitoring function of the supporting platform, which greatly reduces the false alarm rate of the entire system. rate; more specifically, the method for intelligent comprehensive monitoring of manhole covers includes the following processes: database update, judgment of the opening and closing status of the manhole cover, judgment of the liquid level status in the well, judgment of the integrity status of the manhole cover, alarm information push, and manual intervention processing; wherein, the database update is used to initialize and regularly update the illumination and liquid level reference database; the judgment of the opening and closing status of the manhole cover is used to judge whether the manhole cover has moved abnormally; the judgment of the opening and closing status in the well is used to judge whether the liquid level in the well has risen abnormally; the judgment of the integrity status of the manhole cover is used to judge whether the manhole cover is damaged and give a corresponding damage degree assessment; the alarm information push occurs after the system determines that the relevant status is abnormal; further, the database update includes initialization update and regular update; wherein, The initialization update should be carried out after the system deployment is completed, and the initial values ​​and parameters applicable to this project need to be set; the periodic update will continue during the operation of the monitoring system, including the collection, calculation and storage of two kinds of data: illumination and liquid level; further, the judgment of the opening and closing state of the manhole cover mainly relies on the monitoring of the contact electrical signal. When the manhole cover moves abnormally, the conductive ring and the contact are out of contact. At this time, the monitoring system cannot detect the contact electrical signal, and then starts the ultrasonic liquid level sensor to collect high-frequency liquid level data, and calculates the opening angle value of the manhole cover; when the opening angle value of the manhole cover exceeds 15°, the monitoring system determines that the manhole cover has moved abnormally; further, the judgment of the liquid level state in the well mainly relies on the ultrasonic liquid level sensor to return the signal. Detection data: When there are 6 consecutive data points that continue to rise, and the rising trend of the liquid level data shows a uniform or accelerated situation, or the most recently detected liquid level value exceeds the set warning value, the monitoring system will determine that the contact has an electrical signal, and it is determined that the liquid level in the well has risen abnormally; then, the remaining time for the liquid level to rise to the manhole cover at the current rising situation is predicted through curve fitting calculation; further, the judgment of the integrity status of the manhole cover mainly relies on the detection data sent back by the illumination sensor. When there are 3 consecutive data points that are greater than the maximum value of the historical data, or 6 consecutive data points are greater than the average value of the historical data, the monitoring system will determine that the contact has an electrical signal, and it is determined that the manhole cover is damaged; then, by comparing with the historical data, the degree of damage to the manhole cover is evaluated;Furthermore, the alarm information is pushed through the platform. When the monitoring system determines that the manhole cover has moved abnormally, the platform will push the alarm information to the designated personnel, including the angle of the manhole cover opening and the specific time of the movement; when the monitoring system determines that the liquid level in the well has risen abnormally, the platform will push the alarm information to the designated personnel, including the predicted remaining time for the liquid level to rise to the manhole cover at the current rising situation; when the monitoring system determines that the manhole cover is damaged, the platform will push the alarm information to the designated personnel, including the assessment of the degree of damage of the manhole cover. ;

[0075] As another preferred embodiment of the present invention, the damage determination module 400 includes:

[0076] A data management unit is used to collect the light intensity value in the well through the light sensor data sent back by the light sensor and store it in the light reference database, with one week as the storage cycle;

[0077] A preprocessing unit is used to encode and group the light sensor data to obtain arrays and The Ld is used to represent the day data, the Ln is used to represent the night data, the i is used to represent the number of days, and the j is used to represent the jth data of each day;

[0078] Eigenvalue unit, used to calculate the mean of daily data and night data average Said

[0079]

[0080] The maximum value of the light sensing data is taken, and the maximum value is characterized by:

[0081]

[0082] In this embodiment, the specific process is as follows: when it is put into use for the first time, the initial parameters are set on the platform, including the D1 value actually measured after installation; the sampling frequency required according to the actual situation of the project is recorded as M, in units of times / hour; the liquid level warning value required according to the actual situation of the project is recorded as V A , in meters; in normal use, the platform automatically controls the relevant sensors to collect corresponding monitoring data according to the sampling frequency, including light intensity and liquid level data; the light intensity sensor collects the light intensity value in the well; the light intensity benchmark database contains the historical data of the last 7 days, and the newly collected values ​​will roll over the oldest data. The data encoding rule is Ld ij and Ln ij, where Ld represents the data sampled from 6:00 to 18:00 on the same day; Ln represents the data sampled from 18:00 on the same day to 6:00 on the next day; i represents the number of days, with values ​​of 1, 2, 3, 4, 5, 6, 7; j represents the number of data collected on the i-th day, with values ​​of 1, 2, 3...k, where k = 24M.

[0083] As another preferred embodiment of the present invention, the liquid level determination module includes:

[0084] Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data;

[0085] The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is:

[0086]

[0087] Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, Used to characterize changing trends.

[0088] In this embodiment, the specific steps are: the ultrasonic liquid level sensor collects the liquid level data in the well; the liquid level reference database contains the 6 most recently collected data points, and the newly collected values ​​will roll over the oldest data; the data encoding rule is V i , where i represents the number of data arranged from old to new according to sampling time, and the values ​​are 1, 2, 3, 4, 5, 6; the platform will calculate the change trend of the 6 data points according to the following algorithm; update the obtained data and the data in the illumination and liquid level reference database; make a judgment, if (△Tr i , i=(1,5))<1, then continue tracking, if (△Tr i , i=(1,5))>1, then the fluid level in the well is initially judged to be abnormal; continue to judge, if △Tr i If the data change does not completely satisfy △Tr5>△Tr4>△Tr3>△Tr2>△Tr1, the judgment is entered again. When V6≥V A , the alarm information is pushed directly through the platform, otherwise it is restarted (△Tr i , i=(1,5))<1; if there is no electrical signal at the contact, combined with the judgment of the platform's historical data, it is inferred that the manhole cover is abnormally opened. At this time, jump to W42 and execute the subsequent process. If there is an electrical signal at the contact, the platform will fit and calculate the liquid level height change function according to the following algorithm; the sample points are {(t1, V1)(t2, V2)......(t6, V6)}; use n-order polynomial for fitting V(t)=a0t n +a1tn-1 +......+a n-1 t+a n ; The platform starts fitting from n=2 and ends at n=5, Find all ε j After finding the minimum ε j , the corresponding V(t) is the final determined liquid level height change function; let V(t) = 0, and calculate the time t corresponding to the liquid level reaching the manhole cover position N , then starting from the alarm time, the remaining predicted time for the liquid level to reach the manhole cover position is t N -t6.

[0089] As another preferred embodiment of the present invention, the opening and closing determination module includes:

[0090] A cyclic monitoring unit, used for indicating that the manhole cover is in a closed state when a contact electrical signal is detected, and at this time, a detection procedure of the contact electrical signal is cyclically executed;

[0091] The angle calculation unit is used to start the liquid level sensor when no contact electrical signal is detected, collect the liquid level data in the well at a preset time interval, and calculate the manhole cover opening angle based on the liquid level data in the well:

[0092]

[0093] Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears;

[0094] The abnormality judgment unit is used to judge the opening angle of the manhole cover. If θ is less than 15°, continuous angle data monitoring and evaluation is performed. If θ is greater than or equal to 15°, an abnormal movement and separation judgment result is generated.

[0095] As another preferred embodiment of the present invention, the damage determination module further includes:

[0096] The damage judgment unit is used to judge whether the manhole cover is damaged. i >L max , i=1,2,3}∪L i >L avg , i=1,2,3,4,5,6{, then the manhole cover is judged to be damaged,

[0097] The damage verification unit is used to make a coordinated judgment based on the contact electrical signal. If there is no contact electrical signal, it is inferred that the manhole cover is open based on the platform's historical data. If there is a contact electrical signal, a manhole cover damage judgment result is generated.

[0098] In this embodiment, after determining that the manhole cover is damaged, the degree of damage can also be determined: compare the latest data L with the values in the 7-day reference database of illuminance at the same time, and the calculation logic is as follows:

[0099]

[0100] The platform obtains the percentage function P(△L) of the manhole cover damage degree according to the big data model, and then combines △L to evaluate the manhole cover damage degree. The evaluation logic is as follows:

[0101] When 0% < P(△L) ≤ 10%, it is a minor damage and can be left untreated for the time being;

[0102] When 10% < P(△L) ≤ 30%, it is a moderate damage, and a general work order needs to be issued for personnel to go to the site to verify the damage situation;

[0103] When 30% < P(△L) ≤ 50%, it is a severe damage, and an emergency work order needs to be issued for personnel to go to the site to verify the damage situation;

[0104] When P(△L) > 50%, it is a serious damage, and an emergency work order needs to be issued for personnel to carry the manhole cover and go to replace it immediately.

[0105] As Figure 2 shown, the present invention also provides an intelligent comprehensive monitoring method for manhole covers, which includes the steps:

[0106] S10. After the deployment is completed, the database is updated. The database update includes initialization update and regular update respectively. The initialization update is used to set initial and related project parameters, and the regular update is executed in a preset cycle;

[0107] S20. Obtain the contact electrical signal, and determine the opening and closing state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has a movement and detachment event, and a movement and detachment determination result is generated accordingly;

[0108] S30. Obtain the liquid level detection data transmitted back by the ultrasonic liquid level sensor, fit the liquid level trend based on the continuous liquid level detection data on the time axis, and perform collaborative determination based on the contact electrical signal, and generate a liquid level anomaly determination result accordingly;

[0109] S40. Obtain the light sensing data transmitted back by the illuminance sensor, and perform historical peak judgment on the continuous light sensing data. If all exceed the historical peak, perform collaborative determination with the contact electrical signal, and generate a manhole cover damage determination result accordingly;

[0110] S50. Generate a feedback alarm based on multiple determination results, obtain the manhole cover number and positioning information corresponding to the feedback alarm, and push it to the management terminal through the platform.

[0111] As another preferred embodiment of the present invention, the step of acquiring the light sensor data transmitted back by the light sensor and performing historical peak value judgment on the continuous light sensor data includes:

[0112] The light sensor data sent back by the light sensor collects the light intensity value in the well and stores it in the light reference database, with a storage cycle of one week;

[0113] The light sensing data is encoded and grouped to obtain arrays and The Ld is used to represent the day data, the Ln is used to represent the night data, the i is used to represent the number of days, and the j is used to represent the jth data of each day;

[0114] Calculate the daily data mean and night data average Said

[0115]

[0116] The maximum value of the light sensing data is taken, and the maximum value is characterized by:

[0117]

[0118] As another preferred embodiment of the present invention, the step of acquiring the liquid level detection data transmitted back by the ultrasonic liquid level sensor and fitting the liquid level trend based on the continuous liquid level detection data on the time axis includes:

[0119] Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data;

[0120] The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is:

[0121]

[0122] Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, Used to characterize changing trends.

[0123] As another preferred embodiment of the present invention, the step of generating the abnormal movement and separation determination result specifically includes:

[0124] When the contact electrical signal is detected, it indicates that the manhole cover is in a closed state, and at this time, the contact electrical signal detection program is executed cyclically;

[0125] When no contact electrical signal is detected, the liquid level sensor is started, and the liquid level data in the well is collected at a preset time interval, and the manhole cover opening angle is calculated based on the liquid level data in the well:

[0126]

[0127] Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears;

[0128] The manhole cover opening angle is judged. If θ<15°, continuous angle data monitoring and evaluation is performed. If θ≥15°, an abnormal separation judgment result is generated.

[0129] As another preferred embodiment of the present invention, the historical peak value judgment is performed on the continuous light sensor data. If all of them exceed the historical peak value, the step of performing a coordinated judgment with the contact electrical signal, and the corresponding step of generating the manhole cover damage judgment result specifically includes:

[0130] Determine whether the manhole cover is damaged. If {L i >L max , i=1,2,3}∪{L i >L avg , i=1,2,3,4,5,6}, then the manhole cover is judged to be damaged,

[0131] Perform collaborative judgment on the contact electrical signal. If there is no contact electrical signal, combine the platform's historical data to infer that the manhole cover is open. If there is a contact electrical signal, generate a manhole cover damage judgment result.

[0132] The present invention also provides an intelligent integrated monitoring device for manhole covers, the device comprising a suspension device, a sensor device, a control component and a transmission antenna, the sensor device is arranged in the suspension device and is electrically connected to the control component and the transmission antenna, and the sensor device comprises:

[0133] An ultrasonic liquid level sensor is used to emit ultrasonic pulses, which are received by the sensor after being reflected by the liquid surface, so as to detect the liquid level;

[0134] Light intensity sensor, used to detect the light intensity of the domestic environment;

[0135] The suspension device includes a suspension base body, a suspension base fixing nut, a contact and a signal line. The suspension base fixing nut is used to fix the suspension base; the contact is a conductive metal sheet, which is arranged on both sides of the suspension base body and is electrically connected to the control component.

[0136] Furthermore, the suspension device includes a fixing bolt, a suspension base, a spherical hinge joint and a counterweight block. The fixing bolt is fixed to the center position of the manhole cover by a threaded connection. The suspension base is connected to the fixing bolt by a thread, and a semicircular groove is provided at the other end of the suspension base. One end of the spherical hinge joint is a smooth spherical structure for embedding in the semicircular groove of the suspension base, and the other end of the spherical hinge joint is a nut structure with an internal thread. The counterweight block is made of cast iron and is connected to the spherical hinge joint by a thread.

[0137] In this embodiment, the mainstream dual-axis inclination sensor is eliminated and replaced by a simple mechanical device, which has a lower overall cost and is suitable for large-scale promotion and use. The supporting platform can combine the data changes of the liquid level to monitor the abnormal movement of the manhole cover through an algorithm, and then combine the torque tolerance setting of the mechanical device, using the dual judgment of software and hardware, which can effectively avoid false alarms of abnormal movement of the manhole cover; the suspension base is composed of a suspension base body, a suspension base fixing nut, a contact and a signal line; wherein the suspension base body is made of galvanized steel and is chemically plated as a whole; the suspension base fixing nut is used to connect the suspension The base and the fixing bolt; the contact is a conductive metal sheet, which is welded and fixed to the two sides of the semicircular groove of the suspension base body; the signal line is connected to the contact and is led out from the other end through two slender channels pre-drilled on the suspension base body; preferably, the spherical hinge joint is composed of a spherical hinge joint body, a conductive ring and a spherical hinge joint fixing joint; wherein the spherical hinge joint body is made of 304 stainless steel, and one end with a spherical head is chemically plated; the conductive ring is located on the spherical head of the spherical hinge joint body, and is obtained after protection during the chemical plating process , the plane formed by the conductive ring is perpendicular to the center line of the spherical hinge joint, and has a width of about 3mm; the spherical hinge joint fixing joint is connected to the spherical hinge joint body through a thread and has an internal thread; preferably, the sensing device includes an ultrasonic liquid level sensor and a light intensity sensor; wherein the ultrasonic liquid level sensor can emit ultrasonic pulses to the outside, and the sound waves are received by the sensor after being reflected by the liquid surface, and are converted into electrical signals by piezoelectric crystals, and the distance from the sensor to the surface of the measured liquid is calculated by the time between the emission and reception of the sound waves; the light intensity sensor is integrated in the ultrasonic The end of the acoustic liquid level sensor can detect the light intensity of the well environment; preferably, the control component includes a basic module and a battery module; wherein the basic module includes a main control unit, a manhole cover movement monitoring unit, a liquid level detection unit and NB communication, IP68 design; the battery module is composed of multiple groups of lithium thionyl chloride batteries with a battery capacity of 19Ah. The module as a whole is IP68 designed, and the power supply is converted into a wired aviation plug through the interface board to power the entire system; preferably, the antenna is fixed to the manhole cover by screws, and the installation position is close to the hollow position of the manhole cover, such as the well hook hole, hollow pattern, etc.

[0138] Specifically, if Figure 3 , Figure 4 As shown, it includes a manhole cover 1; a fixing bolt 2; a hanging base 3; a hanging base body 31; a hanging base fixing nut 32; a contact 33; a signal line 34; a spherical hinge 4; a spherical hinge body 41; a conductive ring 42; a spherical hinge fixing joint 43; a counterweight 5; an ultrasonic liquid level sensor 6; an illumination sensor 7; a control component 8; an antenna 9; the hanging base body 31 and the spherical hinge body 41 are machined to control dimensional tolerances and surface roughness, and subsequently, after electroplating treatment, a uniform, dense and smooth coating is formed on the surface. The relative sliding torque of the two after assembly is approximately equal to 0.5kgf.cm. This value can ensure that when the opening angle of the manhole cover is ≤10°, the hanging base body 31 and the spherical hinge body 41 will not slide relative to each other, thereby avoiding false alarms caused by slight shaking caused by driving vehicles, passing people, etc. to a certain extent. When the spherical hinge body 41 is electroplated, the area where the conductive ring 42 is located must be protected. After the electroplating is completed, the rest of the spherical surface of the body 41 except the conductive ring 42 is insulated; the plane surrounded by the conductive ring 42 is perpendicular to the center line of the spherical hinge 4 and coincides with the maximum cross-section of the sphere.

[0139] The counterweight block 5 is used to increase the weight of the entire module below the spherical joint body 41 to ensure that when the opening angle of the manhole cover is greater than 10°, the spherical hinge body 41 can overcome the static friction sliding torque and slide freely in the suspension base body 31, thereby keeping the module below the spherical hinge body 41 in a vertical state to ensure that the ultrasonic liquid level sensor 6 can receive the sound waves reflected back from the liquid surface in real time.

[0140] During installation, try to ensure that the fixing bolt 2 is located in the center of the manhole cover 1. If it is blocked by obstacles or for other reasons, it can be fixed on the side away from the hinge of the manhole cover 1, at any position on the diameter of the manhole cover 1 perpendicular to the hinge, to ensure that the opening angle of the manhole cover can be effectively sensed; after installation, measure the straight-line distance between the bolt 2 and the hinge of the manhole cover 1, recorded as D1; ​​during actual operation, for liquid level monitoring: the ultrasonic liquid level sensor 6 regularly detects the liquid level data in the well, and uploads the data to the cloud through the control component 8; when a pipe bursts in the well or the water intake is greater than the water discharge, causing the liquid level to rise, the AI ​​algorithm on the platform side can identify abnormal liquid level events, and give the remaining time for the liquid level to overflow the manhole cover through theoretical calculations, and promptly inform the operation and maintenance personnel to go and deal with it through alarm information push.

[0141] Monitoring of abnormal movement of the manhole cover: when the manhole cover 1 is in a normally closed state, the plane surrounded by the conductive ring 42 is parallel to the ground and can maintain contact with the contact 33. At this time, the control component 8 receives the current of the closed circuit; when the manhole cover 1 is opened manually or tilted more than 10°, the spherical hinge body 41 and the suspension base body 31 slide relative to each other, causing the conductive ring 42 and the contact 33 to separate. At this time, the control component 8 cannot receive the current of the closed circuit, and then the platform calculates the opening angle of the manhole cover through the liquid level data sent back by the ultrasonic liquid level sensor 6. When the opening angle exceeds 15°, an alarm message is issued and the actual opening angle data of the manhole cover is provided in real time.

[0142] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0143] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the disclosure in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0144] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An intelligent integrated monitoring system for manhole covers, characterized in that: Include: An initial maintenance module, used to update the database after deployment is completed. The database update includes initialization update and regular update. The initialization update is used to set the initial and related project parameters. The regular update is executed in a preset periodic cycle. An opening and closing determination module is used to obtain a contact electrical signal, and to determine the opening and closing state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has an abnormal movement and separation event, and a corresponding abnormal movement and separation determination result is generated; The liquid level determination module is used to obtain the liquid level detection data sent back by the ultrasonic liquid level sensor, fit the liquid level trend based on the continuous liquid level detection data on the time axis, and make a coordinated determination based on the contact electrical signal to generate a corresponding liquid level abnormality determination result; The damage judgment module is used to obtain the light sensing data sent back by the light sensor and perform historical peak value judgment on the continuous light sensing data. If all of them exceed the historical peak value, a coordinated judgment is performed with the contact electrical signal to generate a corresponding manhole cover damage judgment result; The monitoring feedback module is used to generate feedback alarms based on multiple judgment results, obtain the manhole cover number and location information corresponding to the feedback alarm, and push it to the management terminal through the platform.

2. The intelligent integrated monitoring system for manhole covers according to claim 1 is characterized in that: The damage determination module comprises: A data management unit is used to collect the light intensity value in the well through the light sensor data sent back by the light sensor and store it in the light reference database, with one week as the storage cycle; A preprocessing unit is used to encode and group the light sensor data to obtain arrays Ld ij and Ln ij , Ld is used to represent day data, Ln is used to represent night data, i is used to represent the number of days, and j is used to represent the jth data of each day; Eigenvalue unit, used to calculate the daily data mean Ld avg and night data mean Ln avg , The maximum value of the light sensing data is taken, and the maximum value is characterized by: L max =MAX(MAX(L 11 :L 1k ),MAX(L 21 :L 2k ),……,MAX(L 71 :L 7k ),) 3. The intelligent integrated monitoring system for manhole covers according to claim 2 is characterized in that: The liquid level determination module comprises: Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data; The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is: Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, and the ΔTr i Used to characterize changing trends.

4. The intelligent integrated monitoring system for manhole covers according to claim 3 is characterized in that: The opening and closing determination module comprises: A cyclic monitoring unit, used for indicating that the manhole cover is in a closed state when a contact electrical signal is detected, and at this time, a detection procedure of the contact electrical signal is cyclically executed; The angle calculation unit is used to start the liquid level sensor when no contact electrical signal is detected, collect the liquid level data in the well at a preset time interval, and calculate the manhole cover opening angle based on the liquid level data in the well: Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears; The abnormality judgment unit is used to judge the opening angle of the manhole cover. If θ is less than 15°, continuous angle data monitoring and evaluation is performed. If θ is greater than or equal to 15°, an abnormal movement and separation judgment result is generated.

5. The intelligent integrated monitoring system for manhole covers according to claim 4 is characterized in that: The damage determination module also includes: The damage judgment unit is used to judge whether the manhole cover is damaged. i >L max , i=1,2,3}∪{L i >L avg , i=1,2,3,4,5,6}, then the manhole cover is judged to be damaged, The damage verification unit is used to make a coordinated judgment based on the contact electrical signal. If there is no contact electrical signal, it is inferred that the manhole cover is open based on the platform's historical data. If there is a contact electrical signal, a manhole cover damage judgment result is generated.

6. A method for intelligent comprehensive monitoring of manhole covers, characterized in that: Include: After the deployment is completed, the database is updated. The database update includes initialization update and periodic update. The initialization update is used to set the initial and related project parameters. The periodic update is performed in a preset periodic cycle. Acquire a contact electrical signal, and determine the open / closed state of the manhole cover based on the contact electrical signal. When the contact electrical signal is interrupted, it indicates that the manhole cover has an abnormal movement and separation event, and a corresponding abnormal movement and separation determination result is generated; The liquid level detection data transmitted back by the ultrasonic liquid level sensor is obtained, the liquid level trend is fitted based on the continuous liquid level detection data on the time axis, and a coordinated judgment is made based on the contact electrical signal to generate a corresponding liquid level abnormality judgment result; Obtain the light sensing data sent back by the light sensor, and make a historical peak judgment on the continuous light sensing data. If all of them exceed the historical peak value, make a coordinated judgment with the contact electrical signal to generate a corresponding manhole cover damage judgment result; Based on multiple determination results, feedback alarms are generated accordingly, the manhole cover number and location information corresponding to the feedback alarms are obtained, and pushed to the management terminal through the platform.

7. The method for intelligent comprehensive monitoring of manhole covers according to claim 6, characterized in that: The step of obtaining the light sensor data transmitted back by the light sensor and determining the historical peak value of the continuous light sensor data includes: The light sensor data sent back by the light sensor collects the light intensity value in the well and stores it in the light reference database, with a storage cycle of one week; The light sensing data is encoded and grouped to obtain arrays Ld ij and Ln ij , Ld is used to represent day data, Ln is used to represent night data, i is used to represent the number of days, and j is used to represent the jth data of each day; Calculate the daily data mean Ld avg and night data mean Ln avg , The maximum value of the light sensing data is taken, and the maximum value is characterized by: L max =MAX(MAX(L 11 :L 1k ),MAX(L 21 :L 2k ),……,MAX(L 71 :L 7k )).

8. The method for intelligent comprehensive monitoring of manhole covers according to claim 7, characterized in that: The step of acquiring the liquid level detection data transmitted back by the ultrasonic liquid level sensor and fitting the liquid level trend based on the continuous liquid level detection data on the time axis includes: Acquire the well liquid level data sent back by the ultrasonic liquid level sensor and store it in a liquid level reference database, wherein the liquid level reference database stores up to six sets of data; The liquid level change trend is fitted based on the liquid level data of multiple wells in chronological order. The formula is: Where V is used to represent the liquid level data in the well, i is used to represent the order of multiple liquid level data in the well, and the ΔTr i Used to characterize changing trends.

9. The method for intelligent comprehensive monitoring of manhole covers according to claim 8, characterized in that: The step of generating the abnormal movement and separation determination result specifically includes: When the contact electrical signal is detected, it indicates that the manhole cover is in a closed state, and at this time, the contact electrical signal detection program is executed cyclically; When no contact electrical signal is detected, the liquid level sensor is started, and the liquid level data in the well is collected at a preset time interval, and the manhole cover opening angle is calculated based on the liquid level data in the well: Among them, V N is the latest detected well liquid level data, and V0 is the last well liquid level data before the contact electrical signal disappears; The manhole cover opening angle is judged. If θ<15°, continuous angle data monitoring and evaluation is performed. If θ≥15°, an abnormal separation judgment result is generated.

10. The method for intelligent comprehensive monitoring of manhole covers according to claim 9, characterized in that: The step of judging the historical peak value of the continuous light sensor data and coordinating the judgment with the contact electrical signal if all of them exceed the historical peak value, and generating the result of the manhole cover damage judgment includes: Determine whether the manhole cover is damaged. If {L i >L max , i=1,2,3}∪{L i >L avg , i=1,2,3,4,5,6}, then the manhole cover is judged to be damaged, Perform collaborative judgment on the contact electrical signal. If there is no contact electrical signal, combine the platform's historical data to infer that the manhole cover is open. If there is a contact electrical signal, generate a manhole cover damage judgment result.

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