CN111551228A - Multistage water level monitoring device based on NB-IoT communication technology - Google Patents
Multistage water level monitoring device based on NB-IoT communication technology Download PDFInfo
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- CN111551228A CN111551228A CN202010354338.2A CN202010354338A CN111551228A CN 111551228 A CN111551228 A CN 111551228A CN 202010354338 A CN202010354338 A CN 202010354338A CN 111551228 A CN111551228 A CN 111551228A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000004891 communication Methods 0.000 title claims abstract description 71
- 238000005516 engineering process Methods 0.000 title claims abstract description 17
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 20
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 6
- 238000007689 inspection Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
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- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/0007—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm for discrete indicating and measuring
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides a multistage water level monitoring device based on NB-IoT communication technology, which comprises an NB-IoT wireless transmission terminal, a communication cable and a plurality of water level sensors, wherein the NB-IoT wireless transmission terminal is used for transmitting water to a water level sensor; the water level sensors are connected to the NB-IoT wireless transmission terminal in parallel through the communication cable; and the plurality of water level sensors are vertically arranged at intervals and fixedly connected with the communication cable. The NB-IoT wireless transmission terminal, the plurality of water level sensors and the like are connected through the communication cable to realize communication, and meanwhile, the plurality of water level sensors are suspended through the communication cable to play a role in fixing the water level sensors, so that when the water level sensor is installed and used, the NB-IoT wireless transmission terminal is directly fixed on the manhole cover without being fixed on the side wall of the manhole, and the plurality of water level sensors are hoisted and hung through the communication cable, so that the installation and maintenance are facilitated.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of sewage pipe network water level monitoring, in particular to a multistage water level monitoring device based on an NB-IoT communication technology.
[ background of the invention ]
In the process of monitoring the water level of the sewage pipe network, the inspection well is dirty in water quality, high in temperature, high in humidity and sundries, the probe of the liquid level meter is easy to adhere to silt and dirt in the using process, the installation and the maintenance are troublesome, and the maintenance workload is large. Meanwhile, in the special environment of a drainage pipe network, active power supply cannot be achieved, and therefore requirements for equipment power consumption are also provided.
The static pressure type liquid level meter probe with low cost needs to be fixed along the well wall when being installed at present, the installation is troublesome, the probe is easily blocked by sludge and dirt in the using process, and the maintenance workload is large. Meanwhile, the transmission module has high power consumption, so that the capacity of a battery is increased, and the miniaturization of equipment cannot be realized.
[ summary of the invention ]
The invention aims to solve the technical problem of providing a multi-stage water level monitoring device based on NB-IoT communication technology, which is used for realizing the water level monitoring in a sewage pipe network and has the advantage of convenient maintenance.
The invention is realized by the following steps: a multi-stage water level monitoring device based on NB-IoT communication technology comprises
An NB-IoT wireless transmission terminal;
a plurality of water level sensors;
the water level sensors are connected to the NB-IoT wireless transmission terminal in parallel through the communication cables; and the plurality of water level sensors are vertically arranged at intervals and fixedly connected with the communication cable.
Further, each water level sensor comprises a waterproof shell, a wiring board and two metal contacts; the wiring board is fixedly connected in the waterproof shell; the two metal contacts are arranged outside the waterproof shell and connected to the wiring board; the patch panel is connected to the NB-IoT wireless transmission terminal through the communication cable.
Further, each of the terminal blocks includes a liquid level trigger module; the liquid level trigger module is connected to the NB-IoT wireless transmission terminal through the communication cable; the liquid level trigger module is connected with the two metal contacts.
Further, the NB-IoT wireless transmission terminal comprises an NB-IoT wireless module and an MCU; the NB-IoT radio is connected to the MCU; the MCU is also connected with the liquid level trigger module.
Further, the NB-IoT wireless transmission terminal further includes a bluetooth module, and the bluetooth module is connected to the MCU.
Further, the NB-IoT wireless transmission terminal further includes an angle sensor connected to the MCU.
Further, the water level sensor comprises a power module, and the NB-IoT wireless transmission terminal and each water level sensor are respectively connected to the power module.
Further, intervals between the adjacent water level sensors are the same or different.
Further, still include the balancing weight, the balancing weight fixed connection in the communication cable.
The invention has the advantages that: the invention discloses a multistage water level monitoring device based on NB-IoT communication technology, which comprises an NB-IoT wireless transmission terminal, a communication cable and a plurality of water level sensors, wherein the NB-IoT wireless transmission terminal is connected with the communication cable; the water level sensors are connected to the NB-IoT wireless transmission terminal in parallel through the communication cable; and the plurality of water level sensors are vertically arranged at intervals and fixedly connected with the communication cable. The NB-IoT wireless transmission terminal, the plurality of water level sensors and the like are connected through the communication cable to realize communication, and meanwhile, the plurality of water level sensors are suspended through the communication cable to play a role in fixing the water level sensors, so that when the water level sensor is installed and used, the NB-IoT wireless transmission terminal is directly fixed on the manhole cover without being fixed on the side wall of the manhole, and the plurality of water level sensors are hoisted and hung through the communication cable, so that the installation and maintenance are facilitated.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a multi-stage water level monitoring apparatus according to the present invention.
Fig. 2 is a schematic block diagram of a multi-stage water level monitoring apparatus according to the present invention.
Fig. 3 to 6 are circuit diagrams of the multi-stage water level monitoring apparatus according to the present invention.
Fig. 7 is a flowchart illustrating the operation of the multi-stage water level monitoring apparatus according to the present invention.
Fig. 8 is a front view of the upper cover of the waterproof case of the present invention.
Fig. 9 is a sectional view a-a in fig. 8.
Fig. 10 is a side view of the upper cover of the waterproof case of the present invention.
FIG. 11 is a front view of the lower cover of the waterproof case of the present invention.
Fig. 12 is a sectional view B-B in fig. 11.
Fig. 13 is a cross-sectional view taken along line C-C of fig. 11.
Fig. 14 is a front view of a housing of an NB-IoT wireless transmission terminal in accordance with the present invention.
Fig. 15 is a cross-sectional view taken along line D-D in fig. 14.
Fig. 16 is a cross-sectional view E-E of fig. 14.
Fig. 17 is a rear view of a housing of an NB-IoT wireless transmission terminal in accordance with the present invention.
Fig. 18 is a front view of an upper housing of an NB-IoT wireless transmission terminal in accordance with the present invention.
Fig. 19 is a sectional view taken along line G-G in fig. 18.
Fig. 20 is a sectional view F-F in fig. 18.
Fig. 21 is a rear view of an upper housing of an NB-IoT wireless transmission terminal in accordance with the present invention.
Fig. 22 is a front view of a lower housing of an NB-IoT wireless transmission terminal according to the present invention.
Fig. 23 is a sectional view H-H in fig. 22.
Fig. 24 is a side view of a lower housing of an NB-IoT wireless transport terminal in accordance with the present invention.
Fig. 25 is a rear view of a lower housing of an NB-IoT wireless transmission terminal according to the present invention.
Description of reference numerals:
NB-IoT wireless transmission terminal 1, upper case 11, lower case 12;
a water level sensor 2, a waterproof case 21; an upper cover 211, a first through hole 2111, a lower cover 212, a screw hole 2121, a second through hole 2122, and a third through hole 2123;
a communication cable 3;
a balancing weight 4;
a well lid 5.
[ detailed description ] embodiments
The general concept of the invention is as follows:
(1) the NB-IoT wireless transmission terminal, the plurality of water level sensors and the like are connected through the communication cable to realize communication, meanwhile, the plurality of water level sensors are suspended through the communication cable and are fixed under the action of the water level sensors, so that when the water level sensor is installed and used, the NB-IoT wireless transmission terminal is directly fixed on the manhole cover without being fixed on the side wall of the manhole, and the plurality of water level sensors are hoisted and hung through the communication cable, so that the installation and maintenance are facilitated.
(2) The NB-IoT wireless transmission terminal adopts the NB-IoT wireless module and the MCU with low power consumption, so that the whole power consumption is lower, the requirement on the battery capacity is reduced, and the miniaturization is facilitated.
Please refer to fig. 1 to 25. Fig. 3 to 6 are a complete circuit diagram of the multi-stage water level monitoring device according to the present invention. Wherein the circuit of the liquid level trigger part in FIG. 5 is only shown for L2, and for L3 to L6, which are the same as for L2, are not shown, and thus are omitted; one end of an overflow2 of an R5 in the L2 is connected with a pin corresponding to an overflow2 in the MCU; corresponding connections are made from overflow3 to overflow6 and so on.
The radio in fig. 5 is the NB-IoT radio.
Fig. 8 to 13 are schematic structural views of an embodiment of the waterproof housing 21, in this case, the waterproof housing 21 includes an upper cover 211 and a lower cover 212, wherein the first through hole 2111 of the upper cover 211 and the screw hole 2121 of the lower cover lock with an application screw; the second through hole 2122 of the lower cover 212 is used for passing through the communication cable 3, and the third through hole 2123 is used for passing through the two metal contacts (not shown) and the connection conductor of the terminal board (not shown) in an airtight manner, for example, the connection conductor may be a screw, and the metal contacts (not shown) are locked on the terminal board (not shown) through the third through hole 2123; or connecting the two through wires, and applying a sealing adhesive on the third through hole 2123 and sleeving a sealing ring. In other embodiments, other configurations may be devised.
Fig. 14 to 25 are schematic structural diagrams of an embodiment of the housing of the NB-IoT wireless transmission terminal 1. The housing of the NB-IoT wireless transmission terminal 1 includes an upper housing 11 and a lower housing 12. Of course, in other embodiments, other configurations may be devised.
The first embodiment is as follows:
the invention relates to a multistage water level monitoring device based on NB-IoT communication technology, which comprises
NB-IoT wireless transmission terminal 1; for communicating with a remote server.
A plurality of water level sensors 2; the water level sensor 2 is used to monitor the water level.
A communication cable 3, through which the plurality of water level sensors 2 are connected in parallel to the NB-IoT wireless transmission terminal 1; and the plurality of water level sensors 2 are vertically arranged at intervals and fixedly connected to the communication cable 3. The communication cable 3 mainly serves two functions: the water level sensor 2 and the invalid transmission terminal 1 are used as connecting wires to realize communication between the two; and secondly, the water level sensor 2 is hoisted and fixed, so that when the multistage water level monitoring device is installed in the inspection well, the water level sensor 2 is directly hung on the communication cable 3 and does not need to be fixed on the side wall of the inspection well. In a specific embodiment, the communication cable 3 adopts a 6-core cable with an anti-corrosion rubber outer casing containing a shielding layer.
Specifically, as shown in fig. 1, the NB-IoT wireless transmission terminal 1 is fixedly installed on a manhole cover 5, a plurality of water level sensors 2 are vertically arranged at intervals and hung on the communication cable 3, the intervals between adjacent water level sensors are the same or different, and the intervals are designed according to the requirement of actually monitoring the water level. And the communication cable 3 and the circuit of the NB-IoT wireless transmission terminal 1 are fixed by welding. During maintenance, only the well cover 5 needs to be opened, and the multi-stage water level monitoring device can be taken out together with the well cover 5 for cleaning, so that the maintenance is convenient.
Example two:
on the basis of the first embodiment:
each of the water level sensors 2 includes a waterproof case 21, a wiring board (not shown), and two metal contacts (not shown); the wiring board (not shown) is fixedly connected to the inside of the waterproof case 21; two metal contacts (not shown) are mounted outside the waterproof housing 21, and the two metal contacts (not shown) are connected to the wiring board (not shown); the patch panel (not shown) is connected to the NB-IoT wireless transmission terminal 1 via the communication cable 3. Usually, the circuit wiring is fixed by welding, that is, in a specific embodiment, the communication cable 3 is fixed to the wiring board (not shown) by welding, so that the communication cable 3 plays a role of fixing and hoisting the water level sensor 2. The waterproof case 21 is only required to be able to seal the wiring board waterproof, and its shape can be designed in various structures. In a specific embodiment, each metal contact (not shown) may be designed with a ring portion, but in other embodiments, other shapes may be designed, and the shape of the metal contact has no special requirement, and screw holes are formed in the waterproof housing 21, screw holes are formed in positions of the connection points corresponding to the connection blocks, and screws are passed through the ring portions and locked into the connection blocks (not shown) so as to perform conduction and fixing functions, and sealing rings may be sleeved or sealant may be applied to the screws and the screw holes of the waterproof housing 21 to perform sealing functions.
Each of said terminal blocks (not shown) comprises a liquid level triggering module; the liquid level trigger module is connected to the NB-IoT wireless transmission terminal 1 through the communication cable 3; the liquid level trigger module is connected to two metal contacts (not shown).
The NB-IoT wireless transmission terminal 1 comprises an NB-IoT wireless module and an MCU; the NB-IoT radio is connected to the MCU; the MCU is also connected with the liquid level trigger module, and the MCU and the liquid level trigger module are connected through the communication cable 3.
The NB-IoT wireless transmission terminal 1 further includes a bluetooth module, and the bluetooth module is connected to the MCU.
The NB-IoT wireless transmission terminal 1 further includes an angle sensor connected to the MCU.
In a specific embodiment, the NB-IoT wireless transmission terminal 1 further includes a housing, and the NB-IoT wireless module, the MCU, the bluetooth module, and the angle sensor are installed in the housing.
As shown in fig. 3 to 6, each of the terminal blocks (not shown) includes a liquid level trigger module; the MCU is connected to each liquid level trigger module through the communication cable 3; the liquid level trigger module is connected to two metal contacts (not shown);
the NB-IoT wireless transmission terminal 1 comprises an NB-IoT wireless module and a SIM card seat; the SIM card holder is communicatively connected to the NB-IoT wireless module; the NB-IoT wireless module is connected to the MCU through the communication cable.
The working principle is as follows: according to the actual use demand, the required quantity of the water level sensors 2 and the corresponding height of the monitored water level are preset, and the length of the communication cable 3 and the interval between the adjacent water level sensors 2 are set according to the height of the detected water level. Inserting a SIM card of an NB-IoT wireless module on the SIM card seat;
when the liquid level in the inspection well rises and contacts with the two metal contacts (not shown) of the water level sensor 2, the two metal contacts (not shown) are in short circuit, the level of the metal contacts is changed, the liquid level trigger module is triggered to feed back a signal to the MCU, the MCU sends the water level state information corresponding to the water level sensor 2 to the NB-IoT wireless module, and the NB-IoT wireless module finally wirelessly transmits the water level state information to a remote server to realize remote monitoring.
The angle sensor is used for monitoring whether the well lid 5 is inclined, tilted and other position change states, so that the state of the well lid is remotely monitored. For example, in the specific implementation, when the multi-stage water level monitoring device is installed on the well lid 5, and the well lid 5 is installed, the angle sensor has an initial angle, which is a default state angle and can be preset in advance, when the well lid 5 is inclined, tilted, or the like, the angle sensor detects that the angle changes, a feedback signal is sent to the MCU, the MCU feeds back the information to the NB-IoT wireless module, and the NB-IoT wireless module finally wirelessly transmits the water level state information to the remote server to prompt a worker that the position of the well lid 5 changes, and then goes to troubleshoot the abnormality. Thereby can in time let the staff know the position of well lid unusual, reduce the risk of potential safety hazards such as this well lid 5 department emergence traffic accident.
The water level sensor comprises an NB-IoT wireless transmission terminal 1 and water level sensors 2, and is characterized by further comprising a power supply module, wherein the NB-IoT wireless transmission terminal 1 and each water level sensor 2 are respectively connected to the power supply module. In a specific implementation, as shown in fig. 3, the power module includes MCU power supply, battery power monitoring, and wireless module power supply, that is, the NB-IoT wireless module supplies power and the bluetooth module supplies power.
The Bluetooth module is in communication connection with the MCU; the Bluetooth module is also connected to the power module. The Bluetooth module is used for configuring relevant information for the MCU, such as configuration parameters, port numbers, awakening time, reporting period, detection liquid level and the like, and the configuration can be carried out according to actual use requirements. For example, in the specific installation process, a worker uses a corresponding APP on the mobile device to communicate with the MCU through the Bluetooth module, and then performs corresponding information configuration; after the configuration is completed, the multi-stage water level monitoring device is installed on the well lid 5, and finally the well lid 5 is installed. And then, the next inspection well is removed for installation operation.
The intervals between the adjacent water level sensors are the same or different, and the size of the intervals is designed according to the water level monitored by actual needs.
Still include balancing weight 4, balancing weight 4 fixed connection in communication cable 3. As shown in fig. 1, the counterweight 4 is installed above the water level sensor 2 at the bottom end, and the counterweight and the communication cable 3 can be fixed in various ways, for example, by gluing, or the communication cable 3 penetrates through the counterweight 4, so that the counterweight 4 is directly sleeved on the communication cable 3, although in other embodiments, other ways can be used to fix.
According to the on-site water level monitoring requirement, a plurality of water level sensors 2 are installed on a communication cable 3 with a preset length in a segmented and parallel mode, and the communication cable 3 is connected into an NB-IoT wireless transmission terminal 1. When the water level sensor 2 monitors that water exists, the NB-IoT wireless transmission terminal 1 is triggered to send the current water level state to a remote server through a narrowband Internet of things (NB-IoT) network.
The wireless circuit board adopts NB-IoT network transmission, when the wireless circuit board is connected to a server, information such as the water level state and the battery state of the equipment is returned and displayed on a computer through a software system, and in the connection process, the equipment can receive a control command issued by the system, modify the parameters of the equipment and enter a dormant state after data transmission is completed.
Description of the triggering principle:
as shown in fig. 5 and 6, the liquid level trigger module includes liquid level triggers and water level segment selections, one metal contact of each water level sensor 2 is connected to a VCC terminal in the water level segment selections, and the other metal contact of each water level sensor 2 is connected to a ground terminal of a magnetic bead FBI in the liquid level triggers, so that a common terminal is grounded.
Each water level sensor 2 is provided with a water level section selection part, that is, if five-level water level monitoring corresponding to L2-L6 is provided, 5 circuits of the water level section selection parts are provided, and if L6 in fig. 6 corresponds to the water level monitoring, L1 on CON3 and CON4 do not need to be wired and are left empty when the water level section selection parts are used specifically; the line of the switch SW3 corresponding to L6 is turned on, and the rest of lines L2 to L5 are turned off, and similarly, the lines L2 to L5 only need to be turned on corresponding lines SW3, so that the selection of the water level section is realized.
Suppose that L2, L3, L4, L5 and L6 correspond to the liquid level monitoring points from top to bottom, i.e. there are 5 water level sensors 2. Suppose the L6 point is at the lowermost end. VCC in the selected portion of the water level section of fig. 6 is a metal contact of the water level sensor corresponding to the water level of L6, and the other metal contact is connected to the ground terminal of the wiring board.
Taking L6 as an example:
in the initial state, the switch SW3 corresponding to L6 is turned on, and L6 needs to dial the dial switch SW3 at the position to VCC, at this time, two metal contacts corresponding to the L6 water level, one is grounded, and the other is turned on with the L6 line in the switch SW 3. When the liquid level rises, the L6 is located at the lowest end, when the two metal contacts corresponding to the L6 are in contact with water in the inspection well, the two metal contacts corresponding to the L6 water level are short-circuited, so that the level changes, the liquid level trigger module is triggered and fed back to the MCU, then the MCU sends the water level state information corresponding to the L6 to the NB-IoT wireless module, and finally the NB-IoT wireless module sends the water level state information to the remote server.
Similarly, the water level monitoring corresponding to L2-L5 turns on the corresponding SW3 line, and the rest are not turned on, and when the corresponding water level is reached, the triggering principle of L2-L5 is the same as that of L6.
Principle of the angle sensor:
after the angle sensor is installed, the angle sensor is in an initial state, the angle is set as a default value, when the position of the well lid 5 changes, the angle monitored by the angle sensor changes, a signal is fed back to the MCU, the MCU feeds back to the NB-IoT wireless module, and finally the NB-IoT wireless module sends the angle state to the remote server.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (9)
1. A multi-stage water level monitoring device based on NB-IoT communication technology is characterized in that: comprises that
An NB-IoT wireless transmission terminal;
a plurality of water level sensors;
the water level sensors are connected to the NB-IoT wireless transmission terminal in parallel through the communication cables; and the plurality of water level sensors are vertically arranged at intervals and fixedly connected with the communication cable.
2. The NB-IoT communication technology-based multi-stage water level monitoring apparatus as claimed in claim 1, wherein: each water level sensor comprises a waterproof shell, a wiring board and two metal contacts; the wiring board is fixedly connected in the waterproof shell; the two metal contacts are arranged outside the waterproof shell and connected to the wiring board; the patch panel is connected to the NB-IoT wireless transmission terminal through the communication cable.
3. The NB-IoT communication technology-based multi-stage water level monitor apparatus as claimed in claim 2, wherein: each wiring board comprises a liquid level trigger module; the liquid level trigger module is connected to the NB-IoT wireless transmission terminal through the communication cable; the liquid level trigger module is connected with the two metal contacts.
4. The NB-IoT communication technology-based multi-stage water level monitoring device as claimed in claim 3, wherein: the NB-IoT wireless transmission terminal comprises an NB-IoT wireless module and an MCU; the NB-IoT radio is connected to the MCU; the MCU is also connected with the liquid level trigger module.
5. The NB-IoT communication technology-based multi-stage water level monitoring device as claimed in claim 4, wherein: the NB-IoT wireless transmission terminal also comprises a Bluetooth module, and the Bluetooth module is connected with the MCU.
6. The NB-IoT communication technology-based multi-stage water level monitoring device as claimed in claim 4, wherein: the NB-IoT wireless transmission terminal further comprises an angle sensor, and the angle sensor is connected to the MCU.
7. The NB-IoT communication technology-based multi-stage water level monitoring apparatus as claimed in claim 1 or 2, wherein: the NB-IoT wireless transmission terminal and each water level sensor are respectively connected to the power supply module.
8. The NB-IoT communication technology-based multi-stage water level monitoring apparatus as claimed in claim 1, wherein: the intervals between the adjacent water level sensors are the same or different.
9. The NB-IoT communication technology-based multi-stage water level monitoring apparatus as claimed in claim 1, wherein: still include the balancing weight, balancing weight fixed connection in the communication cable.
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| CN202010354338.2A CN111551228A (en) | 2020-04-29 | 2020-04-29 | Multistage water level monitoring device based on NB-IoT communication technology |
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| CN202010354338.2A CN111551228A (en) | 2020-04-29 | 2020-04-29 | Multistage water level monitoring device based on NB-IoT communication technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378490A (en) * | 2020-09-25 | 2021-02-19 | 福州福光水务科技有限公司 | Non-contact water level monitoring method and liquid level monitoring device |
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| CN208953072U (en) * | 2018-11-01 | 2019-06-07 | 上海铂珏传感科技有限公司 | A kind of wireless inspection shaft liquid level intelligent monitoring terminal |
| CN212378839U (en) * | 2020-04-29 | 2021-01-19 | 福州福光水务科技有限公司 | Multistage water level monitoring device based on NB-IoT communication technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112378490A (en) * | 2020-09-25 | 2021-02-19 | 福州福光水务科技有限公司 | Non-contact water level monitoring method and liquid level monitoring device |
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