CN113390575A - Water leakage detection method, water leakage detection device and water purification equipment - Google Patents
Water leakage detection method, water leakage detection device and water purification equipment Download PDFInfo
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- CN113390575A CN113390575A CN202010175422.8A CN202010175422A CN113390575A CN 113390575 A CN113390575 A CN 113390575A CN 202010175422 A CN202010175422 A CN 202010175422A CN 113390575 A CN113390575 A CN 113390575A
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- reflected wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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Abstract
The invention relates to a water leakage detection method, a water leakage detection device and a water purification device, wherein microwaves are transmitted to a device to be detected, a water leakage event is preliminarily determined when the reflected wave frequency is greater than the initial frequency of the reflected wave, the reflected wave frequency at a plurality of moments is processed, once the reflected wave frequency at a subsequent moment is greater than the reflected wave frequency at a previous moment, the water leakage phenomenon is determined, the interference of a condensate water collecting process on the determination of the water leakage event is eliminated when the change speed of the reflected wave frequency corresponding to any moment is greater than a preset threshold value of the change speed of the reflected wave frequency, the state of the device to be detected corresponding to any moment is water leakage, the water leakage detection result is accurately obtained through two determinations aiming at the water leakage phenomenon, and the water leakage detection device realizes the water leakage detection of the device to be detected in a non-contact mode, it does not receive the water quality influence, is applicable to the detection of leaking to holding the equipment of examining of different quality of water.
Description
Technical Field
The invention relates to the field of water leakage detection, in particular to a water leakage detection method, a water leakage detection device and water purification equipment.
Background
In the field of water purifiers, water leakage sensors are often used for water leakage detection, alarm reminding and shutdown protection of the water purifiers.
The Chinese patent application CN110697851A discloses an intelligent water purifier, which comprises a controller, wherein a water inlet electromagnetic valve and a booster pump are arranged on a water source pipeline of the water purifier, a water supply pump is arranged on a water outlet pipeline of the water purifier, a temperature sensor, a pressure sensor, a high liquid level sensor and a low liquid level sensor are arranged in a water tank of the water purifier, a first TDS sensor is arranged on the water source pipeline of the water purifier, a flow sensor and a second TDS sensor are arranged on the water outlet pipeline of the water purifier, and the water inlet electromagnetic valve, the booster pump, the water supply pump, the temperature sensor, the pressure sensor, the high liquid level sensor, the low liquid level sensor, the first TDS sensor, the flow sensor and the second TDS sensor are all electrically connected with the controller.
In order to solve the problem of water leakage, in the invention patent application CN110697851A, the water purifier further includes a water leakage sensor electrically connected to the controller, and the water leakage sensor is disposed at a low position at the bottom of the water purifier housing. If the water purifier leaks, leaked water is gathered at the bottom low position of the shell of the water purifier, the water leakage sensor is immersed, the water leakage sensor detects the change of the potential or the resistance, a signal is generated to the controller, and the controller acquires the information of the current water leakage problem of the water purifier.
However, the above-mentioned invention patent application CN110697851A also has some disadvantages for the water leakage detection scheme of the water purifier: even if will leak the sensor setting in the bottom of purifier casing, if the scope of leaking on the purifier is less, the water that spills also must not collect the position of the sensor that leaks in time, just also can't reach the effect that the sensor leaked in the submergence to make the sensor that leaks can't detect the potential or resistance change, just also make the clearing machine can't in time learn the problem of leaking that takes place. Moreover, since the water quality conditions in different regions are different, even if the water leakage sensor is soaked in water with different hardness (water with high hardness or water with low hardness), the water leakage sensor can more easily alarm the water with high hardness, but can not easily alarm the water with low hardness, so that the occurrence of the alarm leakage condition caused by different water quality is easy to occur.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a water leakage detection method for the above prior art.
The second technical problem to be solved by the present invention is to provide a water leakage detection device for implementing the above water leakage detection method.
The third technical problem to be solved by the invention is to provide a water purifying device with the water leakage detection device.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the water leakage detection method is characterized by comprising the following steps:
step 1, emitting microwaves to a preset water leakage detection area of equipment to be detected;
when the time t1Frequency f (t) of the reflected wave of1)>When f (0), turning to the step 4; otherwise, turning to the step 2; wherein, t1>0；
when the frequency of the reflected wave acquired at the subsequent moment is greater than that of the reflected wave acquired at the previous moment, the step 5 is carried out; otherwise, turning to the step 3;
step 5, acquiring the reflected wave frequency change speed corresponding to each moment in a preset time period; wherein the preset time period is marked as T, and the reflected wave frequency change speed at the time T in the preset time period is marked as f' (T);
step 6, judging according to the obtained reflected wave frequency change speed and a preset reflected wave frequency change speed threshold:
when the change speed of the reflected wave frequency is greater than the threshold value of the change speed of the reflected wave frequency, judging that a water leakage event occurs, and executing a countermeasure aiming at the water leakage event; otherwise, go to step 5.
In order to inform the user in time so as to facilitate the adoption of the countermeasure, in the water leakage detection method, the countermeasure aiming at the water leakage event is an alarm prompt.
Particularly, the equipment to be detected is water purifying equipment as a detection object applicable to the water leakage detection method.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the water leakage detection device is characterized by comprising:
the microwave emitter emits microwaves to a preset water leakage detection area of the equipment to be detected;
the microwave receiver receives reflected waves reflected by the microwaves transmitted by the microwave transmitter;
and the processor is connected with the microwave emitter and the microwave receiver respectively, and processes the reflected wave frequency and the frequency change condition of the reflected wave received by the microwave receiver to obtain a judgment result of whether the equipment to be detected has a water leakage event.
In order to inform the user of the water leakage event in time so that the user can take measures, the water leakage detection device further comprises a water leakage prompting device, and the water leakage prompting device is connected with the processor.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the water purification equipment is characterized in that the water leakage detection device is applied.
Specifically, the water purification equipment is a water purifier.
Compared with the prior art, the invention has the advantages that:
firstly, the water leakage detection method of the invention primarily determines that a water leakage event occurs by emitting microwaves to equipment to be detected (such as a water purifier), and when the reflected wave frequency reflected by the emitted microwaves is greater than the initial frequency of the reflected wave, then the reflected wave frequencies at a plurality of moments are obtained for processing, once the reflected wave frequency at a subsequent moment is greater than the reflected wave frequency at a previous moment, the water leakage phenomenon can be determined, then when the reflected wave frequency change speed corresponding to any moment is determined to be greater than a preset reflected wave frequency change speed threshold, the interference of the collection process of condensed water on the water leakage event determination can be eliminated, and then the state of the equipment to be detected corresponding to any moment is water leakage, so that the water leakage detection result can be accurately obtained by twice determination aiming at the water leakage phenomenon;
secondly, the water leakage detection device is not influenced by water quality, and can be suitable for water leakage detection of equipment to be detected containing different water qualities (water with high hardness or water with low hardness);
finally, the water leakage detection device does not need to be contacted with water or soaked by water like a traditional water leakage sensor, realizes water leakage detection aiming at equipment to be detected (such as a water purifier) in a non-contact mode, and meets the diversified requirements of the installation position of the water leakage detection device.
Drawings
FIG. 1 is a schematic flow chart illustrating a water leakage detection method according to an embodiment of the present invention;
fig. 2 is a schematic view of a water leakage detection device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the embodiment provides a water leakage detection method, which is suitable for water leakage detection of a water purifier. Specifically, the water leakage detection method includes the steps of:
step 1, emitting microwaves to a preset water leakage detection area of the water purifier; the preset water leakage detection area can be a larger area where water leakage possibly occurs on the water purifier;
when the time t1Frequency f (t) of the reflected wave of1)>f (0), i.e. time t1When the frequency of the reflected wave is greater than the initial frequency of the reflected wave, it indicates that at time t1Water leakage occurs, so that the process goes to step 4 to confirm the mode of the water leakage state; otherwise, turning to the step 2; wherein, t1>0；
when the frequency of the reflected wave acquired at the subsequent moment is greater than that of the reflected wave acquired at the previous moment, the step 5 is carried out; otherwise, turning to the step 3;
it should be noted that, in step 4, by determining that the frequency of the reflected wave at the subsequent time is greater than the frequency of the reflected wave obtained at the previous time, the interference can be effectively eliminated, so as to confirm that the frequency of the reflected wave reflected by the transmitted microwave is indeed changed, and further confirm that the water leakage phenomenon occurs;
step 5, acquiring the reflected wave frequency change speed corresponding to each moment in a preset time period; wherein, assuming that the preset time period is marked as T, the reflected wave frequency change speed at the time T within the preset time period T is marked as f' (T);
for example, at time t2The corresponding frequency change speed of the reflected wave is f' (t)2)，
In a similar manner, at time t3The corresponding frequency change speed of the reflected wave is f' (t)3)，
Step 6, according to the obtained reflected wave frequency change speed f' (t) and a preset reflected wave frequency change speed threshold fT'hAnd (4) judging:
when the frequency change speed f' (t) of the reflected wave is greater than the threshold fT'hJudging that a water leakage event occurs, and executing a countermeasure aiming at the water leakage event, for example, the countermeasure aiming at the water leakage event is an alarm prompt; otherwise, go to step 5.
It should be noted that, in step 6, during the operation of the water purifier, condensed water usually occurs, and since the condensed water is relatively slow accumulated moisture, and the time required for the condensed water to be condensed into a drop of water is relatively long, the detected reflected wave frequency change speed is very slow, and based on the influence of the slow collection of the condensed water on the detection of water leakage, the interference of the condensed water occurring in the water purifier on the detection of water leakage can be effectively eliminated by comparing the reflected wave frequency change speed with a preset reflected wave frequency change speed threshold, so as to improve the detection accuracy for the water leakage.
Referring to fig. 2, this embodiment provides a water leakage detecting apparatus capable of implementing the above-described water leakage detecting method. Specifically, the water leakage detection device includes:
the microwave emitter 1 emits microwaves to a preset water leakage detection area of the water purifier;
a microwave receiver 2 for receiving a reflected wave of the microwave emitted by the microwave emitter after being reflected;
the processor 3 is respectively connected with the microwave emitter 1 and the microwave receiver 2, and the processor 3 obtains a judgment result of whether the equipment to be detected has a water leakage event according to the frequency of the reflected wave received by the microwave receiver and the frequency change condition of the reflected wave;
a water leakage prompting device 4, wherein the water leakage prompting device 4 is connected with the processor 3.
Specifically, in this embodiment, the processor obtains the frequency of the reflected waves reflected by the microwaves emitted by the microwave emitter, and then performs steps 2 to 6 to determine whether the water leakage phenomenon occurs in the water purifier.
In addition, this embodiment still provides a water purification unit, and it has applied this embodiment's detection device that leaks. Wherein, water purification unit can be purifier or other common equipment that has the water purification function.
Claims (7)
1. The water leakage detection method is characterized by comprising the following steps:
step 1, emitting microwaves to a preset water leakage detection area of equipment to be detected;
step 2, acquiring the frequency of reflected waves reflected by the transmitted microwaves; the frequency of the reflected wave corresponding to the time t is denoted by f (t), t30, and the initial frequency of the reflected wave corresponding to the initial time t being 0 is denoted by f (0);
step 3, judging according to the obtained reflected wave frequency and the reflected wave initial frequency:
when the time t1Frequency f (t) of the reflected wave of1)>When f (0), turning to the step 4; otherwise, turning to the step 2; wherein, t1>0；
Step 4, successively acquiring reflected wave frequencies corresponding to a plurality of moments, and judging the acquired reflected wave frequencies:
when the frequency of the reflected wave acquired at the subsequent moment is greater than that of the reflected wave acquired at the previous moment, the step 5 is carried out; otherwise, turning to the step 3;
step 5, acquiring the reflected wave frequency change speed corresponding to each moment in a preset time period; wherein the preset time period is marked as T, and the reflected wave frequency change speed at the time T in the preset time period is marked as f' (T);
step 6, judging according to the obtained reflected wave frequency change speed and a preset reflected wave frequency change speed threshold:
when the change speed of the reflected wave frequency is greater than the threshold value of the change speed of the reflected wave frequency, judging that a water leakage event occurs, and executing a countermeasure aiming at the water leakage event; otherwise, go to step 5.
2. The water leak detection method according to claim 1, wherein the countermeasure against the water leak event is an alarm prompt.
3. The water leakage detection method according to claim 1, wherein the device to be detected is a water purification device.
4. The water leakage detection device is characterized by comprising:
the microwave emitter (1) emits microwaves to a preset water leakage detection area of the equipment to be detected;
the microwave receiver (2) is used for receiving reflected waves reflected by the microwaves transmitted by the microwave transmitter;
and the processor (3) is respectively connected with the microwave emitter and the microwave receiver, and processes to obtain a judgment result of whether the equipment to be detected has a water leakage event or not according to the frequency of the reflected wave received by the microwave receiver and the frequency change condition of the reflected wave.
5. The water leakage detection device according to claim 1, further comprising a water leakage indication device (4), wherein the water leakage indication device (4) is connected to the processor (3).
6. Water purification apparatus, characterized in that, the water leakage detection device of claim 4 or 5 is applied.
7. The water purification apparatus of claim 6, wherein the water purification apparatus is a water purifier.
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| CN202010175422.8A CN113390575B (en) | 2020-03-13 | 2020-03-13 | Water leakage detection method, water leakage detection device and water purification equipment |
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Cited By (2)
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| CN114063069A (en) * | 2021-11-19 | 2022-02-18 | 国网冀北电力有限公司唐山供电公司 | Novel intelligent monitoring device and method for preventing seepage and rain leakage of transformer substation roof |
| CN114518205A (en) * | 2022-01-07 | 2022-05-20 | 中铁工程装备集团有限公司 | Sealing ring cavity leakage detection device for shield tail of heading machine and heading machine |
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| CN113390575B (en) | 2022-08-12 |
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