CN107222366B - Inspection well environment monitoring method, equipment and system based on low-power-consumption wide area network - Google Patents
Inspection well environment monitoring method, equipment and system based on low-power-consumption wide area network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0287—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/02—Capturing of monitoring data
- H04L43/022—Capturing of monitoring data by sampling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The method, the equipment and the system for monitoring the inspection well environment based on the low-power-consumption wide area network determine the next sampling time by a strategy of priority on the working life of a battery by judging whether the currently sampled environmental parameters of a sensor are far away from an early warning threshold value or not when the environmental parameters are far away from the early warning threshold value, and determine the next sampling time by a strategy of priority on safety when the environmental parameters are close to the early warning threshold value, so that the service life of the battery of the inspection well monitoring equipment can be further prolonged while the safety is ensured.
Description
Technical Field
The invention relates to the technology of Internet of things, in particular to a method, equipment and a system for monitoring an inspection well environment based on a low-power-consumption wide area network.
Background
With the rapid development of the internet of things industry, the wireless sensor network technology is rapidly developed and applied. At present, a plurality of patents and articles propose that wireless sensor network technology and other wireless communication methods are applied to a management system of a manhole cover and a manhole pipeline. The proposed technical scheme mostly adopts Zigbee or GPRS technology as a solution of wireless communication, and monitoring objects are also mostly concentrated on aspects such as inspection well covers, underground environment quality and the like, especially patents for monitoring the loss or damage of the inspection well covers are numerous.
Along with popularization of LoRa and NB-IOT communication technologies, inspection well monitoring products, technologies and patents using the two technologies are gradually proposed, but the problems of service life of equipment batteries and timeliness of danger early warning are common problems which always plague inspection well monitoring systems. The conventional method is to reduce the service life of the equipment battery and increase the collection frequency so as to ensure the timeliness of the danger early warning; or sacrifice the timeliness of the danger early warning, reduce the collection frequency and prolong the service life of the equipment. The acquisition method and the energy consumption model used by the invention can solve the problem.
Disclosure of Invention
In view of this, the present invention provides a method, a device and a system for monitoring an inspection well environment based on a low power consumption wide area network, so as to further prolong the service life of a battery of an inspection well monitoring device while ensuring the security.
According to a first aspect of the invention, a method for monitoring an inspection well environment based on a low-power-consumption wide area network is provided, which comprises the following steps:
detecting at least one environmental parameter in the inspection well by at least one sensor;
for each environmental parameter, when the difference between the currently sampled environmental parameter and the early warning threshold is larger than a preset value, determining the time interval between the currently sampled environmental parameter and the early warning threshold according to the estimated service life of the battery, and when the difference between the currently sampled environmental parameter and the early warning threshold is smaller than the preset value, determining the time interval between the currently sampled environmental parameter and the next sampling according to the difference, the historical change trend of the environmental parameter and the time interval between the current sampling and the previous sampling; and
and reporting all the environment parameters acquired by sampling in real time through a low-power wide area network.
Preferably, the determining the time interval from the next sampling according to the difference value, the historical change trend of the environmental parameter and the time interval between the current sampling and the previous sampling comprises:
the time interval to the next sample is determined recursively according to the following equation:
ΔTK＝|ΔTK-1+[(SK-2-SK-1)/(SW-SK-1)]*ΔTK-2|
wherein, the collection time interval is: delta TK＝TK-TK-1，TKFor the Kth acquisition time, TK-1The current sampling acquisition time; delta TKThe next sampling interval; delta TK-1The sampling interval is the current time; delta TK-2The previous sampling interval; sK-1Obtaining an environmental parameter for a current sample; sK-2Environmental parameters obtained for a previous sampling; sWAnd the early warning threshold value is obtained.
Preferably, determining the time interval to the next sample based on the estimated battery operating life comprises:
estimating the operating life of the battery according to the following formula:
wherein, TLCIs the life cycle of the battery, EBATIs the capacity of the battery, PSThe amount of power consumed for a single sampling, PTThe amount of power consumed for a single transmission of data, PLThe amount of electricity consumed for self-discharge of the battery usThe current consumed by the equipment in a standby state, and delta t is the total service time of the battery; and the number of the first and second groups,
the time interval to the next sample is extended or shortened based on the estimated battery operating life and the predetermined expected life.
Preferably, the time interval between the next sampling and the prolonging or shortening is adjusted according to the battery working life history data of all inspection well environment monitoring equipment according to the estimated battery working life and the preset expected life.
Preferably, when the predetermined value is 0.2 times of the early warning threshold corresponding to the environmental parameter.
Preferably, the method further comprises:
and when the estimated battery service life is less than the minimum service life threshold value, alarming.
Preferably, the at least one sensor comprises one or more of a temperature and humidity sensor, a gas sensor, a leak sensor, a level sensor and a pressure sensor.
In a second aspect, an inspection well environment monitoring device based on a low-power wide area network is provided, which includes:
at least one sensor;
a low power wide area network communication component;
a controller;
a memory for storing executable instructions that, when executed by the controller, perform the method as described above.
In a third aspect, a system for monitoring an inspection well environment based on a low power consumption wide area network is provided, which includes:
a server; and
a plurality of inspection shaft environmental monitoring equipment based on low-power consumption wide area network as above.
Whether the environmental parameter sampled at present by the sensor is far away from the early warning threshold value or not is judged, the next sampling time is determined according to a strategy with priority on the service life of the battery when the environmental parameter is far away from the early warning threshold value, and the next sampling time is determined according to a strategy with priority on safety when the environmental parameter is close to the early warning threshold value, so that the service life of the battery of the inspection well monitoring equipment can be further prolonged while the safety is ensured.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an inspection well environment monitoring system based on a low-power wide area network according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a low-power-consumption wide area network-based inspection well environment monitoring device according to an embodiment of the invention;
fig. 3 is a flowchart of an inspection well environment monitoring method based on a low-power wide area network according to an embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Fig. 1 is a schematic diagram of an inspection well environment monitoring system based on a low-power wide area network according to an embodiment of the invention. As shown in fig. 1, the system includes a plurality of inspection well environment monitoring devices a and a server B. The inspection well environment monitoring equipment A is arranged in an inspection well, is preferably connected with an inspection well cover, and is used for monitoring the underground environment, acquiring environment parameters and reporting the environment parameters to the server B based on a low-power-consumption wide area network. The server B is a general-purpose data processing device loaded with a predetermined program. The server B can effectively monitor and manage the inspection well facilities according to the environmental parameters reported by the inspection well environment monitoring equipment A. The server B may display the states of the geographically distributed inspection well settings based on the location service, perform an alarm when an abnormality is detected, and the like.
Fig. 2 is a schematic diagram of an inspection well environment monitoring device based on a low-power wide area network according to an embodiment of the invention. As shown in fig. 2, the inspection well environment monitoring device includes a low-power consumption wide area network communication component 1, a travel switch 2, a travel switch sensor 3, a power management circuit 4, and a controller 5. Wherein the low power wide area network communication section 1 is configured to perform communication based on a low power wide area network. The low-power-consumption wide area network is oriented to the communication requirements of long distance and low power consumption in the Internet of things, and is an Internet of things network layer technology appearing in recent years. Existing network protocols such as Lora, Weigthless, 802.11ah, NB-IoT are among the low power wan technologies. In this embodiment, the low power consumption wide area network communication unit 1 uses a free frequency band of 1Ghz or less, and has a long communication distance.
The travel switch 2 is connected with the inspection well cover and is opened or closed along with the inspection well cover. A travel switch (also called a limit switch) is a common low-current electric appliance. The contact of the mechanical motion part is operated by the collision to realize the connection or disconnection of the control circuit, thereby achieving a certain control purpose. Generally, such switches are used to limit the position or stroke of the movement of the machine, so that the moving machine can automatically stop, move in reverse, shift or automatically move back and forth according to a certain position or stroke. The travel switch sensor 3 is connected to the travel switch 2 and is configured to detect a state of the travel switch. The power management circuit 4 is used for controlling the power state according to the state of the travel switch.
In particular, the power management circuit 4 may include a low power management circuit 41 for controlling the switching of the power supply between the active state or the low power consumption state. The low energy consumption management circuit 41 controls the power supply to be in a working state when the inspection well cover is opened, and is in a low energy consumption state after the inspection well cover is closed. The low power management circuit 41 may also turn off the power after a predetermined time in the low power state. The power management circuit 4 may also include a battery monitoring circuit 42 for detecting battery status and feeding back to the controller 5. The controller 5 may send an alarm message when the battery power is too low to prompt maintenance. Meanwhile, the embodiment adopts micro power consumption for the power supply, so that the average power consumption is less than 1 mw.
And the controller 5 is connected with the low-power-consumption wide area network communication part 1, the travel switch sensor 3 and the power management circuit 4 and is used for information interaction.
Preferably, the multifunctional inspection well environment monitoring device based on the low-power wide area network further comprises a downhole environment monitoring component 6, which is connected with the controller 5 and is used for detecting downhole environment parameters. The downhole environment monitoring component 6 may be a plurality of separate sensors or may be a sensor that integrates multiple functions. In particular, the downhole environment monitoring component 6 may include one or more of a temperature and humidity sensor, a gas sensor, a leak sensor, a liquid level sensor, and a pressure sensor. Therefore, the underground environment monitoring component 6 can realize comprehensive monitoring on underground temperature and humidity, harmful gas content, leakage, liquid level and pressure in the well. Meanwhile, all the sensors can be detachably connected with the main circuit, namely the controller, through the standard data interface, and therefore the sensors can be flexibly additionally installed or additionally installed according to needs. Further, the controller 5 is configured to control the low power consumption wide area network communication component 1 to report the downhole environment parameter. Therefore, the handheld terminal or the control center or the predetermined server used by the inspection personnel can acquire the underground related information in real time.
The controller 5 is used for controlling the low-power wide area network communication part 1 to report the state of the travel switch 2. Therefore, the control center can monitor the states of all the inspection well covers in real time according to the reported state information. Meanwhile, the controller 5 controls the sampling time interval of each sensor and the time interval of information reporting to obtain a balance between the effectiveness of monitoring implementation and the service life of the maximum battery.
Specifically, the controller 5 executes a method flow as shown in fig. 3. Fig. 3 is a flowchart of an inspection well environment monitoring method based on a low-power wide area network according to an embodiment of the present invention. As shown in fig. 3, the method includes:
step S100, detecting at least one environmental parameter in the inspection well through at least one sensor.
As described above, the at least one sensor includes one or more of a temperature and humidity sensor, a gas sensor, a leak sensor, a level sensor, and a pressure sensor. Whereby the at least one environmental parameter comprises one or more of temperature and humidity, concentration of harmful gases, presence or absence of a leak, fluid level in the well, and pressure in the well.
Step S200, judging whether the difference between the currently sampled environmental parameter and the corresponding early warning threshold value is larger than a preset threshold value or not for each environmental parameter, if so, turning to step S300, and otherwise, turning to step S400.
In this embodiment, the predetermined threshold is 0.2 times of the corresponding warning threshold. That is, when the current environmental parameter is less than 0.8 times the warning threshold, i.e., Sk-1<0.8*SWIn the process, the current environmental parameter principle early warning threshold value can be considered, and a working life priority strategy can be adopted to determine the sampling interval.
Step S300, for each environmental parameter, when the difference between the currently sampled environmental parameter and the early warning threshold is larger than a preset value, determining the time interval between the currently sampled environmental parameter and the next sampling according to the estimated working life of the battery.
Specifically, step S300 includes:
step S310, estimating the service life of the battery according to the following formula:
wherein, TLCIs the life cycle of the battery, EBATIs the capacity of the battery, PSThe amount of power consumed for a single sampling, PTThe amount of power consumed for a single transmission of data, PLThe amount of electricity consumed for self-discharge of the battery usThe current consumed by the device in the standby state, Δ t, is the total usage time of the battery. The sigma-sign is used to cumulatively sum the energy consumed each time.
Step S320, extending or shortening the time interval from the next sampling according to the estimated battery operating life and the predetermined expected life.
Specifically, the time interval can be adjusted according to the historical data of the working life of the batteries of all the inspection well environment monitoring devices through big data analysis. The big data analysis can be carried out in the server B, and the calculation result is sent to each inspection well monitoring device in a timing mode.
Alternatively, the time interval for sampling may be determined in a predetermined tabular manner based on the difference between the battery operating life and the predetermined expected life.
And step S400, when the difference value between the environment parameter of the current sampling and the early warning threshold value is smaller than a preset value, determining the time interval between the current sampling and the next sampling according to the difference value, the historical change trend of the environment parameter and the time interval between the current sampling and the previous sampling.
Specifically, step S400 includes:
the time interval to the next sample is determined recursively according to the following equation:
ΔTK＝|ΔTK-1+[(SK-2-SK-1)/(SW-SK-1)]*ΔTK-2|
wherein, the collection time interval is: delta TK＝TK-TK-1，TKFor the Kth acquisition time, TK-1The current sampling acquisition time; delta TKThe next sampling interval; delta TK-1The sampling interval is the current time; delta TK-2The previous sampling interval; sK-1Obtaining an environmental parameter for a current sample; sK-2Environmental parameters obtained for a previous sampling; sWAnd the early warning threshold value is obtained. Therefore, the sampling time interval can be determined in a recursive mode, when the environmental parameters are close to or higher than the early warning threshold value, the sampling frequency is rapidly improved, and the monitoring effectiveness and the system safety are ensured.
And S500, reporting all the environment parameters acquired by sampling in real time through a low-power wide area network.
After step S500, the process returns to step S100 to perform the next sampling. And the process is circulated.
Preferably, an alarm may also be issued when the estimated battery operating life is less than a minimum life threshold. The alarm can be reported to the server B through the low-power wide area network, and the server B further alarms the client. Therefore, the inspection personnel can be reminded of maintaining the equipment in time.
Whether the environmental parameter sampled at present by the sensor is far away from the early warning threshold value or not is judged, the next sampling time is determined according to a strategy with priority on the service life of the battery when the environmental parameter is far away from the early warning threshold value, and the next sampling time is determined according to a strategy with priority on safety when the environmental parameter is close to the early warning threshold value, so that the service life of the battery of the inspection well monitoring equipment can be further prolonged while the safety is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for monitoring the environment of an inspection well based on a low-power-consumption wide area network comprises the following steps:
detecting at least one environmental parameter in the inspection well by at least one sensor;
for each environmental parameter, when the difference between the currently sampled environmental parameter and the early warning threshold is larger than a preset value, determining the time interval between the currently sampled environmental parameter and the early warning threshold according to the estimated service life of the battery, and when the difference between the currently sampled environmental parameter and the early warning threshold is smaller than the preset value, determining the time interval between the currently sampled environmental parameter and the next sampling according to the difference, the historical change trend of the environmental parameter and the time interval between the current sampling and the previous sampling; and
reporting all environment parameters obtained by sampling in real time through a low-power wide area network;
determining the time interval between the current sampling and the previous sampling according to the difference, the historical change trend of the environmental parameter and the time interval between the current sampling and the previous sampling comprises the following steps:
the time interval to the next sample is determined recursively according to the following equation:
ΔTK＝|ΔTK-1+[(SK-2-SK-1)/(SW-SK-1)]*ΔTK-2|
wherein, the collection time interval is: delta TK＝TK-TK-1，TKFor the Kth acquisition time, TK-1Time of acquisition for current sample；ΔTKThe next sampling interval; delta TK-1The sampling interval is the current time; delta TK-2The previous sampling interval; sK-1Obtaining an environmental parameter for a current sample; sK-2Environmental parameters obtained for a previous sampling; sWAnd the early warning threshold value is obtained.
2. The method for monitoring the environment of the inspection well based on the low-power wide area network, according to claim 1, wherein the step of determining the time interval from the next sampling according to the estimated battery service life comprises the following steps:
estimating the operating life of the battery according to the following formula:
wherein, TLCIs the life cycle of the battery, EBATIs the capacity of the battery, PSThe amount of power consumed for a single sampling, PTThe amount of power consumed for a single transmission of data, PLThe amount of electricity consumed for self-discharge of the battery usThe current consumed by the equipment in a standby state, and delta t is the total service time of the battery; and the number of the first and second groups,
the time interval to the next sample is extended or shortened based on the estimated battery operating life and the predetermined expected life.
3. The inspection well environment monitoring method based on the low-power-consumption wide area network, according to claim 2, characterized in that, according to the estimated battery working life and the preset expected life, the time interval between the next sampling and the prolonging or shortening is adjusted according to the battery working life historical data of all inspection well environment monitoring equipment.
4. The inspection well environment monitoring method based on the low-power wide area network is characterized in that the preset value is 0.2 times of the early warning threshold value corresponding to the environment parameter.
5. The inspection well environment monitoring method based on the low-power-consumption wide area network is characterized by further comprising the following steps of:
and when the estimated battery service life is less than the minimum service life threshold value, alarming.
6. The inspection well environment monitoring method based on the low-power-consumption wide area network is characterized in that the at least one sensor comprises one or more of a temperature and humidity sensor, a gas sensor, a leakage sensor, a liquid level sensor and a pressure sensor.
7. An inspection well environment monitoring device based on low-power consumption wide area network includes:
at least one sensor;
a low power wide area network communication component;
a controller;
a memory for storing executable instructions that, when executed by the controller, perform the method of any of claims 1-6.
8. An inspection well environment monitoring system based on low-power consumption wide area network includes:
a server; and
a plurality of low-power wide area network based inspection well environment monitoring devices according to claim 7.
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| CN107680359B (en) * | 2017-09-30 | 2020-09-29 | 南京南瑞集团公司 | Integration thing networking intelligence well lid |
| CN110166971A (en) * | 2019-05-21 | 2019-08-23 | 江南大学 | Low-consumption wireless communication device and system applied to inspection shaft pipe network |
| CN116095801B (en) * | 2023-04-13 | 2023-06-30 | 中国电信股份有限公司浙江分公司 | High-reliability energy-saving method and device for base station equipment |
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