CN105046871A - Well lid monitoring device and well lid - Google Patents

Well lid monitoring device and well lid Download PDF

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Publication number
CN105046871A
CN105046871A CN201510482215.6A CN201510482215A CN105046871A CN 105046871 A CN105046871 A CN 105046871A CN 201510482215 A CN201510482215 A CN 201510482215A CN 105046871 A CN105046871 A CN 105046871A
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CN
China
Prior art keywords
well lid
microprocessor
monitoring device
water immersion
immersion switch
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Granted
Application number
CN201510482215.6A
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Chinese (zh)
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CN105046871B (en
Inventor
高坤
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Individual
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Individual
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Priority to CN201510482215.6A priority Critical patent/CN105046871B/en
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Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • E02D29/1481Security devices, e.g. indicating unauthorised opening
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass

Abstract

The invention discloses a well lid monitoring device and a well lid. The well lid monitoring device comprises a water immersion switch, a pressure sensor, an angle sensor, a microprocessor and a power supply. In the well lid monitoring device, when the well lid is not inclined to a preset angle, the microprocessor does not work and is in a dormant state; when the liquid surface is not risen to a warning water level, the pressure sensor and the microprocessor don't work and are in the dormant state; only when the well lid is inclined and inclined to the preset angle or the liquid surface is risen to the warning water level, the microprocessor is started to go into a working state. As a result, the well lid monitoring device can effectively reduce the energy consumption of the battery and can prolong the service life of the device. Furthermore, when the well lid is inclined to the preset angle or the liquid surface water level is risen to the warning water level, the microprocessor is started to go into a working state. As a result, the well lid monitoring device can simultaneously monitor the water level inside the well and the fact that whether the well lid is inclined, and is complete in functions.

Description

Well lid monitoring device and well lid
Technical field
Detection Techniques field of the present invention, particularly relates to a kind of well lid monitoring device and well lid.
Background technology
In city, well lid is commonly used to hide inspection shaft, prevents people or thing to fall inspection shaft.On the one hand, in heavy rain sky, often the water level of part inspection shaft as sewer pipe can be caused to rise suddenly and sharply because of the impeded drainage of sewer pipe, water level rises suddenly and sharply and may cause city ponding.Therefore, when water level exceedes default warning line, need to carry out alarm.On the other hand, if well lid is subjected to displacement because of inclination, then abnormally dangerous, pedestrian probably steps on sky or is stumbled to by well lid, therefore, when well lid run-off the straight, needs the instant warning message that sends to relevant departments, carries out on-call maintenance by relevant departments to well lid.
Existing device of monitoring well lid, function ratio is more single, and whether as only can to tilting to monitor or monitor water level, therefore, well lid needs to install multiple warning device.And existing warning device is normally monitored by sensor, when monitoring water level and rising to warning line or well lid inclination, give the alarm.Wherein, sensor needs power supply to provide electric energy.Due to the restriction of well lid environment for use, general employing battery is its energy supply.But in current well lid, sensor is in energising holding state usually, power consumption is comparatively large, thus makes battery consume electricity very soon, and affects the serviceable life of monitoring device.
Summary of the invention
Based on this, be necessary multi-functional and the well lid monitoring device of consuming little energy and well lid.
A kind of well lid monitoring device, comprising:
Water immersion switch, described water immersion switch is often opened, and described water immersion switch is arranged on warning line place, and when liquid level arrives warning line, described water immersion switch is immersed in water unlatching,
The pressure transducer be connected with described water immersion switch, described pressure transducer is arranged on designated water level place, and the energising when described water immersion switch is opened, for gathering current level pressure;
Angular transducer, for detecting the angle of inclination of well lid;
The microprocessor be connected with described angular transducer and described pressure transducer, start for starting when described water immersion switch is opened and/or detect when well lid tilts to predetermined angle at described angular transducer, and obtain current level according to described current level pressure, and/or obtain the angle of inclination of described well lid; And;
The power supply be connected with described water immersion switch, pressure transducer, angular transducer and microprocessor, described power supply provides electric energy for described water immersion switch, pressure transducer, angular transducer and microprocessor.
Wherein in a kind of embodiment, also comprise the communication module be connected with described microprocessor, described communication module is activated after described microprocessor starts, described microprocessor sends warning message by described communication module to host computer, and described warning message comprises the angle of inclination of current level and/or described well lid.
Wherein in a kind of embodiment, described angular transducer be used for detect tilt to predetermined angle time, export corresponding voltage signal according to the angle of inclination of described well lid;
Described device also comprises comparer, the in-phase input end of described comparer is connected with described angular transducer, inverting input is used for input reference voltage, and its output terminal is connected with the input end of described microprocessor, and described microprocessor is activated when described comparer exports high level.
Wherein in a kind of embodiment, described pressure transducer comprises probe and wire, and described probe is arranged on warning line place, and described probe is connected with described microprocessor by described wire.
Wherein in a kind of embodiment, described water immersion switch is arranged on described probe.
Wherein in a kind of embodiment, also comprise timer, described timer is connected with described microprocessor, and described microprocessor is activated at the Preset Time of described timer.
Wherein in a kind of embodiment, described microprocessor is used for upon actuation to described timer input reset signal, and described timer resets according to described reset signal.
Wherein in a kind of embodiment, also comprise alarm, described alarm is connected with described microprocessor, and described microprocessor sends alerting signal to described alarm after described microprocessor starts, and described alarm gives the alarm according to described alerting signal.
A kind of well lid, comprise above-mentioned well lid monitoring device, described well lid monitoring device is arranged on described well lid.
This well lid monitoring device, when well lid does not tilt to predetermined angle, microprocessor does not work, and is in dormant state, when liquid level water level does not rise to warning line, pressure transducer and microprocessor do not work, and are in dormant state, only have when well lid occur tilting and tilt to predetermined angle and/or liquid level rise to warning line time, microprocessor just starts and enters duty, therefore, the energy consumption of battery can be effectively reduced, improve the serviceable life of device.And, when well lid tilts to predetermined angle or liquid level water level rises to warning line, can microprocessor be started, make microprocessor in running order, therefore, this well lid monitoring device, can whether tilt to monitor to the water level in well and well lid simultaneously, multiple functional.
Accompanying drawing explanation
Fig. 1 is a kind of module diagram of well lid monitoring device of embodiment;
Fig. 2 is the module diagram of the well lid monitoring device of another kind of embodiment;
Fig. 3 is the module diagram of the well lid monitoring device of another embodiment.
Embodiment
As shown in Figure 1, well lid monitoring device comprises: water immersion switch 100, pressure transducer 200, angular transducer 300, microprocessor 400 and power supply 500, power supply 500 is connected with water immersion switch 100, pressure transducer 200, angular transducer 300, microprocessor 400, and night sweat pass 100, pressure transducer 200, angular transducer 300, microprocessor 400 of water supply provides electric energy.
Water immersion switch 100 is often opened, and water immersion switch 100 is arranged on warning line place.When liquid level water level is lower than warning line, pressure transducer and microprocessor do not work, and are in dormant state.When liquid level water level rises to warning line, water immersion switch 100 is immersed in water unlatching.
Pressure transducer 200 is connected with water immersion switch 100, and pressure transducer 200 is arranged on designated water level place, is energized, for gathering current level pressure when water immersion switch 100 is opened.
Angular transducer 300, for detecting the angle of inclination of well lid.In a particular embodiment, angular transducer 300 can adopt three axle speed-up chips to form, concrete adopted ADXL345 chip.
Angular transducer 300 is connected with microprocessor 400 with pressure transducer 200, microprocessor is not opened not detect when well lid tilts to predetermined angle with angular transducer 300 in water immersion switch 100 and is in dormant state, microprocessor 400 starts when water immersion switch 100 is opened and/or detects when well lid tilts to predetermined angle at angular transducer 300 and starts, and obtain current level according to current level pressure, and/or obtain the angle of inclination of well lid.
As shown in Figure 1, pressure transducer 200 is set in designated water level place, and its water level is h1, and pressure transducer can be arranged at warning line place or be arranged at below warning line.
When liquid level water level rises to warning line, water immersion switch is opened, and pressure transducer 200 is started working and gathered current level pressure, and microprocessor 400 obtains current level according to current level pressure.
In a particular embodiment, as shown in Figure 1, current level be according to pressure calculate liquid level to the height h of pressure transducer and pressure transducer desired location height h1's and.
Microprocessor 400 obtains the height of liquid level to pressure transducer according to pressure formula:
P=ρgh;
Wherein P is the pressure that pressure transducer detects, ρ is the density of liquid, g is acceleration of gravity, h is the height of liquid level to pressure transducer, as shown in Figure 1, therefore, microprocessor rises to warning line at liquid level water level, water immersion switch 100 is activated when being immersed in water, and can obtain current level according to the current level pressure of pressure transducer collection.
Microprocessor can also detect when well lid tilts to default angle at angular transducer and be activated, and obtains the angle of inclination of the well lid of angular transducer detection.
Therefore, this well lid monitoring device, when well lid does not tilt to predetermined angle, microprocessor does not work, be in dormant state, when liquid level water level does not rise to warning line, pressure transducer and microprocessor do not work, be in dormant state, only have when well lid occur tilting and tilt to predetermined angle and/or liquid level rise to warning line time, microprocessor just starts and enters duty, therefore, the energy consumption of battery can be effectively reduced, improve the serviceable life of device.And, when well lid tilts to predetermined angle or liquid level water level rises to warning line, can microprocessor be started, make microprocessor in running order, therefore, this well lid monitoring device, can whether tilt to monitor to the water level in well and well lid simultaneously, multiple functional.
In another embodiment, as shown in Figure 2, also comprise the communication module 600 be connected with microprocessor, communication module 600 is activated after microprocessor 400 starts, microprocessor 400 sends warning message by communication module 600 to host computer, and warning message comprises the angle of inclination of current level and/or well lid.
Communication module 600 is in dormant state when not starting, and only just starts after microprocessor starts, therefore can reduce the energy consumption of battery.The warning message at the angle of inclination of current level and/or well lid is sent to host computer by communication module 600 by microprocessor.
After well lid tilts to predetermined angle and/or water level rises above the warning line, relevant departments staff can check well warning message by host computer, can safeguard or subordinate's arrangement in time well lid according to warning message in time, as Evacuation, to operate a switch flood discharge etc., thus ensure the safety of life and property of the people.
In a particular embodiment, angular transducer 300 is when detecting well lid and tilting to predetermined angle, and the angle of inclination according to well lid exports corresponding voltage signal, and the size of this voltage signal is relevant with the angle of inclination of well lid.
As shown in Figure 3, this well lid inclination alarming device also comprises comparer 900, and the in-phase input end of comparer 900 is connected with angular transducer 300, and inverting input is used for input reference voltage, and its output terminal is connected with the input end of microprocessor 400.Comparer 900 is when the voltage signal that angular transducer 300 exports is greater than reference voltage, and export high level signal to microprocessor 400, microprocessor 400 is activated.
In other embodiments, comparer 900 also can adopt contrary mode to access the output voltage of reference voltage and angular transducer 300, and when low level signal, start microprocessor, principle is identical, does not repeat them here.
In another embodiment, this well lid monitoring device, as shown in Figure 2, also comprise timer 800, timer 800 is connected with microprocessor 400, and microprocessor 400 is activated at the Preset Time of timer.
Timer 800 carries out self-inspection for starting well lid monitoring device.The Preset Time of timer 800 can be arranged as required by user, as one month or a week.After the time arranged arrives, timer 800 transmits control signal to microprocessor 400, microprocessor 400 starts according to this control signal, and start communication module, microprocessor 400 obtains the well lid angle of inclination data that angular transducer gathers, and well lid angle of inclination data are sent to host computer by communication module.By carrying out self-inspection to well lid inclination alarming device, the situation of this well lid inclination alarming device can be obtained, as battery condition, operation conditions.
Microprocessor 400 upon actuation, also to timer input reset signal, timer 800 resets according to reset signal, timer 800 reclocking, start microprocessor at Preset Time and carry out self-inspection, or start when well lid tilts to predetermined angle and concurrently send alerting signal.
This well lid monitoring device, can carry out self-inspection at Preset Time, obtain the situation of this well lid inclination alarming device every Preset Time.
Relevant staff can safeguard well lid in time according to warning message, well lid is flat again, well lid is after being flat, detector detect well lid do not tilt to predetermined angle and water level does not rise to warning line time, microprocessor and communication module will be in dormant state, thus reduce the energy consumption of battery.
As shown in Figure 2, pressure transducer comprises probe 201 and wire 202, probe 201 is arranged on warning line place, when liquid level rises to warning line, water immersion switch 100 is opened, and pressure transducer is energized, gather current level pressure data, probe 201 is connected with the input end of microprocessor 400 by wire 202, in other embodiments, water immersion switch 300 can be arranged on probe 301.
This well lid monitoring device also comprises the alarm 700 be connected with microprocessor, and microprocessor 400 upon actuation, sends alerting signal to alarm 700, and alarm gives the alarm according to described alerting signal.Alarm can be used for reminding pedestrian to note, and well lid run-off the straight or water level go up, and note walking safety.
Whether this well lid monitoring device, can not only monitor the water level in well, can also tilt monitor to well lid, concrete several functions.And the monitoring of this well lid only have when well lid occur tilting and tilt to predetermined angle and/or liquid level rise to warning line time, microprocessor just starts and enters duty, therefore, can effectively reduce the energy consumption of battery, the serviceable life of raising device.This well lid monitoring device, can also carry out self-inspection every Preset Time.
Whether the present invention also provides a kind of well lid, comprises above-mentioned well lid monitoring device, and this well lid monitoring device is arranged on well lid, tilt and in well, water level is monitored to well lid.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (9)

1. a well lid monitoring device, comprising:
Water immersion switch, described water immersion switch is often opened, and described water immersion switch is arranged on warning line place, and when liquid level arrives warning line, described water immersion switch is immersed in water unlatching,
The pressure transducer be connected with described water immersion switch, described pressure transducer is arranged on designated water level place, and the energising when described water immersion switch is opened, for gathering current level pressure;
Angular transducer, for detecting the angle of inclination of well lid;
The microprocessor be connected with described angular transducer and described pressure transducer, start for starting when described water immersion switch is opened and/or detect when well lid tilts to predetermined angle at described angular transducer, and obtain current level according to described current level pressure, and/or obtain the angle of inclination of described well lid; And;
The power supply be connected with described water immersion switch, pressure transducer, angular transducer and microprocessor, described power supply provides electric energy for described water immersion switch, pressure transducer, angular transducer and microprocessor.
2. well lid monitoring device according to claim 1, it is characterized in that, also comprise the communication module be connected with described microprocessor, described communication module is activated after described microprocessor starts, described microprocessor sends warning message by described communication module to host computer, and described warning message comprises the angle of inclination of current level and/or described well lid.
3. well lid monitoring device according to claim 1, is characterized in that, described angular transducer be used for detect tilt to predetermined angle time, export corresponding voltage signal according to the angle of inclination of described well lid;
Described device also comprises comparer, the in-phase input end of described comparer is connected with described angular transducer, inverting input is used for input reference voltage, and its output terminal is connected with the input end of described microprocessor, and described microprocessor is activated when described comparer exports high level.
4. well lid monitoring device according to claim 1, is characterized in that, described pressure transducer comprises probe and wire, and described probe is arranged on warning line place, and described probe is connected with described microprocessor by described wire.
5. well lid monitoring device according to claim 4, is characterized in that, described water immersion switch is arranged on described probe.
6. well lid monitoring device according to claim 1, is characterized in that, also comprise timer, and described timer is connected with described microprocessor, and described microprocessor is activated at the Preset Time of described timer.
7. well lid monitoring device according to claim 6, is characterized in that, described microprocessor is used for upon actuation to described timer input reset signal, and described timer resets according to described reset signal.
8. well lid monitoring device according to claim 1 and 2, it is characterized in that, also comprise alarm, described alarm is connected with described microprocessor, described microprocessor sends alerting signal to described alarm after described microprocessor starts, and described alarm gives the alarm according to described alerting signal.
9. a well lid, comprises the well lid monitoring device described in any one of claim 1-8, and described well lid monitoring device is arranged on described well lid.
CN201510482215.6A 2015-08-07 2015-08-07 Well lid monitoring device and well lid Active CN105046871B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105444836A (en) * 2015-12-30 2016-03-30 高坤 Water level monitoring device and method and well lid
CN105974866A (en) * 2016-05-16 2016-09-28 成都易信达科技股份有限公司 Intelligent electronic well lid
CN106054690A (en) * 2016-03-08 2016-10-26 刘利 Method, device and system for monitoring manhole covers
CN106205066A (en) * 2016-07-05 2016-12-07 深圳市金立通信设备有限公司 Method, device and the terminal of a kind of detection of soaking
CN106759507A (en) * 2016-12-15 2017-05-31 南京恒威防护设备有限公司 A kind of intelligently realizing explosion-proof and venting of dust explosion cover plate assembly that people's air defense design is taken into account for piping lane
CN107326936A (en) * 2017-08-23 2017-11-07 苏州浩哥文化传播有限公司 A kind of safe town road well lid of intelligent anti-theft
CN111042114A (en) * 2019-12-19 2020-04-21 中铁十二局集团有限公司 Pile foundation intelligent filling device and construction method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110080306A (en) * 2019-06-06 2019-08-02 广东沅朋网络科技有限公司 A kind of intelligent well cover and its monitoring method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203616846U (en) * 2013-10-31 2014-05-28 无锡美新物联网科技有限公司 Wireless condition monitoring system used for well cover
CN104120741A (en) * 2014-07-24 2014-10-29 厦门翔磊贸易有限公司 Safety warning device of well lid
CN104298156A (en) * 2014-10-16 2015-01-21 天津国诚泰德科技有限公司 Wireless multifunctional and intelligent monitoring device for underground pipe network
CN104732729A (en) * 2015-04-10 2015-06-24 厦门理工学院 Energy-saving type flood early warning method and device for garage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203616846U (en) * 2013-10-31 2014-05-28 无锡美新物联网科技有限公司 Wireless condition monitoring system used for well cover
CN104120741A (en) * 2014-07-24 2014-10-29 厦门翔磊贸易有限公司 Safety warning device of well lid
CN104298156A (en) * 2014-10-16 2015-01-21 天津国诚泰德科技有限公司 Wireless multifunctional and intelligent monitoring device for underground pipe network
CN104732729A (en) * 2015-04-10 2015-06-24 厦门理工学院 Energy-saving type flood early warning method and device for garage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105444836A (en) * 2015-12-30 2016-03-30 高坤 Water level monitoring device and method and well lid
CN106054690A (en) * 2016-03-08 2016-10-26 刘利 Method, device and system for monitoring manhole covers
CN105974866A (en) * 2016-05-16 2016-09-28 成都易信达科技股份有限公司 Intelligent electronic well lid
CN106205066A (en) * 2016-07-05 2016-12-07 深圳市金立通信设备有限公司 Method, device and the terminal of a kind of detection of soaking
CN106759507A (en) * 2016-12-15 2017-05-31 南京恒威防护设备有限公司 A kind of intelligently realizing explosion-proof and venting of dust explosion cover plate assembly that people's air defense design is taken into account for piping lane
CN106759507B (en) * 2016-12-15 2019-04-23 南京恒威防护设备有限公司 A kind of intelligently realizing explosion-proof and venting of dust explosion cover plate assembly for taking into account people's air defense design for piping lane
CN107326936A (en) * 2017-08-23 2017-11-07 苏州浩哥文化传播有限公司 A kind of safe town road well lid of intelligent anti-theft
CN111042114A (en) * 2019-12-19 2020-04-21 中铁十二局集团有限公司 Pile foundation intelligent filling device and construction method
CN111042114B (en) * 2019-12-19 2021-10-15 中铁十二局集团有限公司 Pile foundation intelligent filling device and construction method

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