CN112378490A - Non-contact water level monitoring method and liquid level monitoring device - Google Patents
Non-contact water level monitoring method and liquid level monitoring device Download PDFInfo
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- CN112378490A CN112378490A CN202011021519.XA CN202011021519A CN112378490A CN 112378490 A CN112378490 A CN 112378490A CN 202011021519 A CN202011021519 A CN 202011021519A CN 112378490 A CN112378490 A CN 112378490A
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- water level
- capacitance value
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- level sensor
- trigger
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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
- G01F23/22—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
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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
- G01F23/22—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
Abstract
The invention provides a non-contact water level monitoring method and a liquid level monitoring device, comprising the following steps: a wireless transmission terminal; a plurality of water level sensors are arranged; the trigger module comprises a trigger chip and an induction capacitor, and the induction capacitor is in communication connection with the trigger chip; the trigger module is fixedly connected in the waterproof shell; and each trigger chip is connected in parallel to the wireless transmission terminal through the communication cable. When the water level sensor is not submerged by liquid, the sensing capacitor has a certain static capacitance; when the water level sensor is submerged by liquid, the parasitic capacitance of the liquid is coupled to the static capacitance of the sensing capacitor, so that the final capacitance value of the water level sensor is reduced; the capacitance signal of the water level sensor is converted into a switching value signal through the trigger chip and judged, the water level height of the inspection well can be judged, the preset height corresponding to the water level sensor is the height of the water level, and remote monitoring is achieved.
Description
Technical Field
The invention relates to the technical field of sewage pipe network water level monitoring, in particular to a non-contact water level monitoring method and a non-contact liquid level monitoring device.
Background
In the process of monitoring the water level of a sewage pipe network, the inspection well is dirty in water quality, high in temperature, high in humidity and sundries, an induction element needs to be in contact with sewage in the using process of a probe of the static pressure type liquid level meter, the liquid level height is measured and calculated by measuring the pressure of liquid submerging the probe, and therefore the probe is easy to adhere to silt and dirt and needs to be maintained regularly.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a non-contact water level monitoring method and a non-contact water level monitoring device, wherein an induction element measures the height of the water level of an inspection well in a non-contact manner, so that the maintenance workload is reduced.
The invention is realized by the following steps: a non-contact fluid level monitoring device comprising:
a wireless transmission terminal;
a plurality of water level sensors are arranged; each water level sensor comprises a waterproof shell and a trigger module, each trigger module comprises a trigger chip and an induction capacitor, and the induction capacitors are in communication connection with the trigger chips; the trigger module is fixedly connected in the waterproof shell;
each trigger chip is connected in parallel to the wireless transmission terminal through the communication cable;
wherein, a plurality of the water level sensors are vertically arranged at intervals.
Further, the wireless transmission terminal comprises
A wireless communication module;
and the MCU is in communication connection with the wireless communication module and each trigger chip.
Further, the wireless communication module comprises
The wireless module is in communication connection with the MCU;
and the SIM card seat is in communication connection with the wireless module.
Further, the wireless transmission terminal further comprises a bluetooth module, and the bluetooth module is in communication connection with the MCU.
Further, the device also comprises a power supply; the power supply is connected with the wireless module, the Bluetooth module, the MCU and each trigger chip.
Further, the wireless transmission terminal also comprises an angle sensor which is connected with the wireless transmission terminal through the communication cable.
The invention also provides a non-contact type water level monitoring method, which adopts the non-contact type liquid level monitoring device and comprises the following steps:
receiving a capacitance value generated by an induction capacitor on the water level sensor;
processing the received capacitance value, sending the processed capacitance value to an MCU (microprogrammed control Unit), sending the received capacitance value to a wireless communication module by the MCU, reporting the received capacitance value to a server by the wireless communication module, comparing the received capacitance value with a preset initial capacitance value by the server, and judging whether a water level sensor is submerged, wherein if yes, the preset water level height corresponding to the water level sensor is the current water level height; if not, the surface water level sensor is not submerged and the water level is below the water level sensor.
Further, the condition for judging whether the water level sensor is submerged is as follows:
when the capacitance value received by the server is smaller than the preset initial capacitance value, the water level sensor is submerged;
when the capacitance value received by the server is larger than or equal to the preset initial capacitance value, the water level sensor is not submerged.
The invention has the following advantages: the invention provides a non-contact water level monitoring method and a liquid level monitoring device, comprising the following steps: a wireless transmission terminal; a plurality of water level sensors are arranged; each water level sensor comprises a waterproof shell and a trigger module, each trigger module comprises a trigger chip and an induction capacitor, and the induction capacitors are in communication connection with the trigger chips; the trigger module is fixedly connected in the waterproof shell; and each trigger chip is connected in parallel to the wireless transmission terminal through the communication cable. When the water level sensor is not submerged by liquid, the sensing capacitor has a certain static capacitance; when the water level sensor is submerged by liquid, the parasitic capacitance of the liquid is coupled to the static capacitance of the sensing capacitor, so that the final capacitance value of the water level sensor is reduced; the capacitance signal of the water level sensor is converted into a switching value signal through the trigger chip and judged, the water level height of the inspection well can be judged, the preset height corresponding to the water level sensor is the height of the water level, and remote monitoring is achieved.
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 an embodiment of a liquid level monitoring apparatus according to the present invention.
FIG. 2 is a schematic block diagram of the fluid level monitoring apparatus of the present invention.
Fig. 3 to 6 are circuit diagrams of an embodiment of the liquid level monitoring device of the present invention.
Fig. 7 is a flowchart of a water level monitoring method of the present invention.
Description of reference numerals:
a wireless transmission terminal 1;
the water level sensor 2, the waterproof shell 21, the trigger module 22, the trigger chip 221 and the induction capacitor 222;
a communication cable 3;
a balancing weight 4;
a well lid 5.
Detailed Description
The invention concept of the invention is as follows:
(1) the induction capacitor 222 is fixedly arranged inside the waterproof shell 21 and is not in contact with liquid, so that the influence of sludge and dirt is avoided, environmental interference factors are reduced, and the requirement of reducing maintenance workload when the water level of the inspection well is monitored is met.
When the water level sensor 2 is not submerged by liquid, the sensing capacitor 222 has a certain static capacitance; when water level inductor 2 is submerged by liquid, the parasitic capacitance of liquid will couple to this induction capacitance 222's static electric capacity on, make water level inductor 2's final capacitance value diminish, induction capacitance 222's capacitance value is the biggest when water level inductor 2 does not contact water promptly, contact water can diminish, turn into switching value signal through triggering chip 221 with water level inductor 2's capacitance signal and send for MCU, the back is sent for wireless module, finally transmit for the server through wireless module long-range, by the server and judge, can judge inspection shaft water level height, this moment this water level inductor 2 corresponds predetermines the height that highly is the water level promptly, realize remote monitoring.
Please refer to fig. 1 to 7. Wherein fig. 3 to 6 constitute a complete circuit diagram of the liquid level monitoring device.
The invention relates to a non-contact liquid level monitoring device, which comprises:
a wireless transmission terminal 1;
a plurality of water level sensors 2 are arranged; each water level sensor 2 comprises a waterproof shell 21 and a trigger module 22, the trigger module comprises a trigger chip 221 and an induction capacitor 222, and the induction capacitor 222 is in communication connection with the trigger chip 221; the trigger module 22 is fixedly connected in the waterproof shell 21; in one implementation, the trigger module 22 may employ a wiring board on which the trigger chip 221 and the sensing capacitor 222 are disposed.
A communication cable 3, wherein each trigger chip 221 is connected in parallel to the wireless transmission terminal 1 through the communication cable 3; the communication cable 3 mainly serves two functions: the water level sensor 2 is used as a connecting line of the wireless transmission terminal 1 to realize communication between the water level sensor and the wireless transmission terminal; secondly, the water level sensor 2 is hoisted and fixed, so that when the liquid 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 the specific implementation, because the communication cable 3 and the wiring board are connected by welding, the water level sensor 2 can be fixedly hung on the communication cable 3 through the welding points in practical use. Certainly, communication cable 3 can also further with waterproof case 21 is fixed, can adopt modes such as gluing, joint, line buckle locking to fix, from making the solder joint between communication cable 3 and the wiring board reduce the atress, avoids giving the welding point between communication cable and water level sensor 2 and the wireless transmission terminal 1 and pulls the pine and take off, and leads to communication inefficacy.
Wherein, a plurality of water level inductor 2 is vertical interval and arranges, and every water level inductor 2 corresponds a water level height, and when certain water level inductor 2 was flooded by liquid, it indicates that the liquid level height in the inspection well reaches this water level inductor 2's predetermined height promptly to realize the monitoring to the liquid level. And a plurality of the water level sensors 2 are arranged, so that multi-level water level monitoring can be realized.
Water level monitoring principle: when the water level sensor 2 is not submerged by liquid, the sensing capacitor 222 has a certain static capacitance, and the capacitance value is the largest at this time; when water level inductor 2 is submerged by liquid, the parasitic capacitance of liquid will couple to this induction capacitance 222's static capacitance on, make water level inductor 2's final capacitance value diminish, turn into switching value signal through triggering chip 221 with water level inductor 2's capacitance signal and send for MCU, send for wireless module after, finally give the server through wireless module remote transmission, carry out the judgement by the server, can judge inspection shaft water level height, this moment this water level inductor 2 corresponds predetermines highly be the height of water level promptly, realize remote monitoring.
The wireless transmission terminal 1 comprises
A wireless communication module;
and the MCU is in communication connection with the wireless communication module and each trigger chip 221.
The wireless communication module comprises
The wireless module is in communication connection with the MCU; in a specific embodiment, as shown in fig. 4, the radio module is an NB-IoT radio module, and the SIM card socket is used for inserting a SIM card.
In concrete implementation, wireless communication module, MCU, bluetooth module can install in a shell, and the shape of this shell can set up according to the demand at will, for example, square, cuboid, heterotypic structure all can, go to set up according to the demand can. Similarly, the shape of the waterproof housing can be designed at will according to the requirement, such as a cuboid, a cube, a special-shaped structure and the like.
And the SIM card seat is in communication connection with the wireless module.
The wireless transmission terminal also comprises a Bluetooth module, and the Bluetooth module is in communication connection with the MCU. 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 device also comprises a power supply; the power supply is connected with the wireless module, the Bluetooth module, the MCU and each trigger chip. In a specific implementation, as shown in fig. 5, the power supply includes MCU power supply, battery power monitoring, wireless module power supply, bluetooth module power supply, and trigger module power supply.
The wireless transmission terminal further comprises an angle sensor which is connected to the wireless transmission terminal through the communication cable. 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 concrete implementation, work as liquid level monitoring device install on well lid 5, well lid 5 installation back, angle sensor has an initial angle, and this angle is the angle of acquiescence state, can predetermine in advance, when well lid 5 changes such as slope, perk, angle sensor detects the angle and changes, and feedback signal gives MCU, MCU then feeds back to wireless module, wireless module is last with water level state information wireless transmission for remote server, suggestion staff well lid 5 position change, go to the troubleshooting unusual again. 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.
In a specific implementation, as shown in fig. 1, a weight 4 may be further disposed, and the weight is fixedly connected to the communication cable 3.
The invention also provides a non-contact water level monitoring method, which adopts the non-contact liquid level monitoring device, wherein the wireless module and the remote server realize communication, and the water level monitoring method comprises the following steps:
receiving a capacitance value generated by an induction capacitor on the water level sensor 2;
the received capacitance value is processed and then sent to the MCU, and in a specific embodiment, the trigger chip 221 processes the received capacitance value into a digital value and sends the digital value to the MCU; the MCU sends the received capacitance value to the wireless communication module, the wireless communication module reports the received capacitance value to the server, and finally the server compares the received capacitance value with a preset initial capacitance value to judge whether the water level sensor 2 is submerged or not, if so, the preset water level height corresponding to the water level sensor 2 is the current water level height; if not, the surface level sensor 2 is not submerged and the water level is below the level sensor 2, indicating that the liquid level has not reached the predetermined height of the level sensor 2.
Wherein, the conditions for judging whether the water level sensor 2 is submerged are:
when the capacitance value received by the server is smaller than the preset initial capacitance value, the water level sensor 2 is submerged;
when the capacitance value received by the server is larger than or equal to the preset initial capacitance value, the water level sensor 2 is not submerged.
In the specific implementation, the predetermined initial capacitance value may be a specific capacitance value or a threshold value, and if the threshold value is adopted, the accuracy of monitoring may be improved, because in the actual manufacturing process, even if the water level sensors 2 of the same model are used, the precision and parameters of each water level sensor 2 have a certain error in the manufacturing process, or the parameters have a fluctuation range, therefore, the threshold value is adopted for the predetermined initial capacitance value, so that the monitoring precision is higher. For example, when the detected capacitance value is smaller than the lower limit value of the predetermined initial capacitance value, the surface water level sensor 2 is submerged, whereas it is not submerged.
The trigger circuit diagram illustrates: referring to fig. 6, KEY1 in the trigger chip-output capacitance circuit is the sensing capacitor 222, and in the specific implementation, a copper sheet may be used and attached inside the waterproof housing 21; when the liquid in the inspection well submerges the water level sensor 2, the KEY1 generates a capacitance value, the capacitance value is fed back to the trigger chip 221 for processing, the processing value is a value and is sent to the MCU, then the value is sent to the wireless module by the MCU, and finally the value is transmitted to the remote server, the remote server compares the received capacitance value with a preset initial capacitance value, if the capacitance value is smaller than the initial capacitance value, the water level sensor 2 on the surface is submerged, and the liquid level in the inspection well at the moment on the surface is at a preset height corresponding to the water level sensor 2. Wherein the PWR CTL1 supplies power for switching on the current trigger module; when the water level sensor 2 corresponding to the current trigger module is submerged, the trigger chip switches on the PWR CTL2, supplies power to the next trigger module, switches on the power supply and starts working. Thus, each water level sensor 2 is switched on to work in a grading way, and the electric quantity can be saved. In other embodiments, the sensors can be directly powered on and turned on at the same time, so that the water level sensor 2 that is not submerged above is turned on and turned on, and power consumption is increased. This can be set according to actual requirements.
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 (8)
1. A non-contact liquid level monitoring device is characterized in that: the method comprises the following steps:
a wireless transmission terminal;
a plurality of water level sensors are arranged; each water level sensor comprises a waterproof shell and a trigger module, each trigger module comprises a trigger chip and an induction capacitor, and the induction capacitors are in communication connection with the trigger chips; the trigger module is fixedly connected in the waterproof shell;
each trigger chip is connected in parallel to the wireless transmission terminal through the communication cable;
wherein, a plurality of the water level sensors are vertically arranged at intervals.
2. A non-contact liquid level monitoring device according to claim 1, wherein: the wireless transmission terminal comprises
A wireless communication module;
and the MCU is in communication connection with the wireless communication module and each trigger chip.
3. A non-contact liquid level monitoring device according to claim 2, wherein: the wireless communication module comprises
The wireless module is in communication connection with the MCU;
and the SIM card seat is in communication connection with the wireless module.
4. A non-contact liquid level monitoring device according to claim 3, wherein: the wireless transmission terminal also comprises a Bluetooth module, and the Bluetooth module is in communication connection with the MCU.
5. A non-contact liquid level monitoring device according to claim 4, wherein: the device also comprises a power supply; the power supply is connected with the wireless module, the Bluetooth module, the MCU and each trigger chip.
6. A contactless liquid level monitoring device according to any of claims 1 to 3, characterized in that: the wireless transmission terminal further comprises an angle sensor which is connected to the wireless transmission terminal through the communication cable.
7. A non-contact water level monitoring method is characterized in that: a non-contact liquid level monitoring device according to claim 3, wherein the water level monitoring method comprises the following steps:
receiving a capacitance value generated by an induction capacitor on the water level sensor;
processing the received capacitance value, sending the processed capacitance value to an MCU (microprogrammed control Unit), sending the received capacitance value to a wireless communication module by the MCU, reporting the received capacitance value to a server by the wireless communication module, comparing the received capacitance value with a preset initial capacitance value by the server, and judging whether a water level sensor is submerged, wherein if yes, the preset water level height corresponding to the water level sensor is the current water level height; if not, the surface water level sensor is not submerged and the water level is below the water level sensor.
8. The non-contact water level monitoring method according to claim 7, wherein: the conditions for judging whether the water level sensor is submerged are as follows:
when the capacitance value received by the server is smaller than the preset initial capacitance value, the water level sensor is submerged;
when the capacitance value received by the server is larger than or equal to the preset initial capacitance value, the water level sensor is not submerged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021519.XA CN112378490A (en) | 2020-09-25 | 2020-09-25 | Non-contact water level monitoring method and liquid level monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011021519.XA CN112378490A (en) | 2020-09-25 | 2020-09-25 | Non-contact water level monitoring method and liquid level monitoring device |
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| CN112378490A true CN112378490A (en) | 2021-02-19 |
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| CN202011021519.XA Pending CN112378490A (en) | 2020-09-25 | 2020-09-25 | Non-contact water level monitoring method and liquid level monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116794561A (en) * | 2023-08-22 | 2023-09-22 | 深圳市萨菲力科技有限公司 | Pulse electronic fence circuit breaking point positioning method, device, medium and processing system |
-
2020
- 2020-09-25 CN CN202011021519.XA patent/CN112378490A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116794561A (en) * | 2023-08-22 | 2023-09-22 | 深圳市萨菲力科技有限公司 | Pulse electronic fence circuit breaking point positioning method, device, medium and processing system |
| CN116794561B (en) * | 2023-08-22 | 2023-11-21 | 深圳市萨菲力科技有限公司 | Pulse electronic fence circuit breaking point positioning method, device, medium and processing system |
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