CN112379464A - Water entry detection method and device and wearable device - Google Patents
Water entry detection method and device and wearable device Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 164
- 206010013647 Drowning Diseases 0.000 claims abstract description 55
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Abstract
The embodiment of the invention discloses a method and a device for detecting water entry and wearable equipment, which are used for acquiring a light intensity value acquired by an ambient light sensor; if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, judging whether the voltage value of the water-entering detection point is matched with the preset voltage value; the water inlet detection point is composed of a power supply and a resistor; the preset voltage value is used for representing the voltage value corresponding to the water-entering detection point in the atmospheric environment. And if the voltage value of the water entering detection point is not matched with the preset voltage value, outputting drowning prompt information. By detecting the duration time that the light intensity value is lower than the preset threshold value, the condition that sudden blocking causes sudden change of the light intensity value collected by the ambient light sensor can be effectively eliminated, and the misjudgment rate of the water entering detection is reduced. And on the basis of detecting the light intensity value, the voltage value of the water-entering detection point is further judged, and the accuracy of detecting the water-entering condition is improved while the water-entering condition is ensured to be detected in time.
Description
Technical Field
The invention relates to the technical field of intelligent electronic equipment, in particular to an underwater detection method and device and wearable equipment.
Background
The daily life of people is enriched by various entertainment projects. People who like seaside often do some activities like outdoor surfing, diving, swimming, etc., or play on the beach with children.
However, the wading project may have a risk of drowning, for example, people who often take children to play at sea often have a drowning risk because parents' negligence causes the children to break away from their own sight, and if the children run into water without supervision of adults and play alone, the drowning risk may exist.
In the prior art, staff is often relied on to supervise personnel participating in a wading project. However, the supervision ability of the staff is limited, and especially for wading projects with a large number of players, when drowning users appear, the staff may not find the drowning situation in time.
Therefore, how to improve the timeliness and accuracy of drowning condition discovery is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for detecting drowning and a wearable device, which can improve the timeliness and accuracy of drowning condition discovery.
In order to solve the above technical problem, an embodiment of the present invention provides an inflow detection method, including:
acquiring a light intensity value collected by an ambient light sensor;
judging whether the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value or not;
if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, judging whether the voltage value of the water-entering detection point is matched with the preset voltage value; the water inlet detection point is composed of a power supply and a resistor; the preset voltage value is obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point;
and if the voltage value of the water entering detection point is not matched with the preset voltage value, outputting drowning prompt information.
Optionally, the determining whether the voltage value of the water entry detection point matches a preset voltage value includes:
acquiring a first voltage value of a first water inlet detection point; the first water inlet detection point is a water inlet detection point arranged at the bottom of the device;
judging whether the first voltage value is equal to a preset first threshold value or not;
if the first voltage value is not equal to a preset first threshold value, acquiring a second voltage value of a second water inlet detection point; the second water inlet detection point is a water inlet detection point arranged at the top of the device;
judging whether the second voltage value is equal to a preset second threshold value or not;
and if the second voltage value is not equal to a preset second threshold value, executing the step of outputting drowning prompt information.
Optionally, after the step of determining that the voltage value of the water entry detection point does not match the preset voltage value, the method further includes:
and acquiring the underwater depth information acquired by the water depth barometer.
Optionally, after the acquiring the light intensity value collected by the ambient light sensor, the method further includes:
when the light intensity value is detected to be lower than a preset threshold value, starting a timing function;
correspondingly, after the acquiring the underwater depth information collected by the underwater barometer, the method further comprises the following steps:
and calculating a time difference value between the time when the entry depth information is acquired and the time when the timing function is started, and taking the time difference value as drowning time.
Optionally, after the step of determining that the voltage value of the water entry detection point does not match the preset voltage value, the method further includes:
reporting drowning status information to the terminal device; wherein, drowning state information includes the depth information of entrying and drowning time.
The embodiment of the invention also provides a water inlet detection device, which comprises a controller, an ambient light sensor, a prompting component and a water inlet detection point arranged on the surface of the water inlet detection device; the water inlet detection point is composed of a power supply and a resistor;
the controller is connected with the ambient light sensor and is used for acquiring a light intensity value acquired by the ambient light sensor; judging whether the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value or not;
the controller is respectively connected with the water inlet detection point and the prompting component and is used for judging whether the voltage value of the water inlet detection point is matched with a preset voltage value or not if the duration time that the light intensity value is lower than a preset threshold value reaches a preset time limit value; if the voltage value of the water entry detection point is not matched with the preset voltage value, triggering the prompt component to output drowning prompt information; and the preset voltage value is obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point.
Optionally, the water entry detection points include a first water entry detection point arranged at the bottom of the water entry detection device and a second water entry detection point arranged at the top of the water entry detection device;
the controller is specifically used for acquiring a first voltage value of the first water inlet detection point; judging whether the first voltage value is equal to a preset first threshold value or not; if the first voltage value is not equal to a preset first threshold value, acquiring a second voltage value of a second water inlet detection point; judging whether the second voltage value is equal to a preset second threshold value or not; and if the first voltage value is not equal to a preset first threshold value, triggering the prompt component to output drowning prompt information.
Optionally, a water depth barometer is also included;
the controller is connected with the water depth barometer and used for triggering the water depth barometer to acquire the water depth information after the voltage value of the water entry detection point is not matched with the preset voltage value.
Optionally, a timer is further included;
the controller is connected with the timer and used for triggering the timer to start a timing function when the light intensity value is detected to be lower than a preset threshold value; after the underwater depth information collected by the water depth barometer is obtained, the time difference value between the time when the underwater depth information is obtained and the time when the timing function is started is calculated, and the time difference value is used as drowning time.
Optionally, the system further comprises a terminal device;
the controller is in communication connection with the terminal equipment and is used for reporting drowning state information to the terminal equipment after the voltage value of the water inlet detection point is not matched with a preset voltage value; wherein, drowning state information includes the depth information of entrying and drowning time.
The embodiment of the invention also provides wearable equipment which comprises the water inlet detection device.
According to the technical scheme, the light intensity value collected by the ambient light sensor is obtained; the light intensity collected by the ambient light sensor under the atmospheric environment and the water environment can be greatly different, and compared with the atmospheric environment, the light intensity collected under the water environment is lower. Therefore, whether the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value or not can be judged; if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, it indicates that the ambient light sensor may be in the water environment at the moment. In order to improve the accuracy of the water inlet detection, whether the voltage value of the water inlet detection point is matched with a preset voltage value can be further judged; wherein, the water-entering detection point can be composed of a power supply and a resistor; the preset voltage value can be obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water entry detection point, and the preset voltage value is used for indicating the voltage value corresponding to the water entry detection point in the atmospheric environment. If the voltage value of the water entry detection point is not matched with the preset voltage value, the water entry detection point is in the water environment at the moment, and at the moment, drowning prompt information can be output. In the technical scheme, the condition that sudden shielding causes sudden change of the light intensity value collected by the ambient light sensor can be effectively eliminated by detecting the duration time that the light intensity value is lower than the preset threshold value, and the misjudgment rate of water entering detection is reduced. And on the basis of detecting the light intensity value, the voltage value of the water-entering detection point is further judged, and the accuracy of detecting the water-entering condition is improved while the water-entering condition is ensured to be detected in time.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of an underwater detection method according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a portable device according to an embodiment of the present invention;
fig. 3a is a schematic view illustrating a first water entry detection point disposed at the bottom of a bracelet according to an embodiment of the present invention;
fig. 3b is a schematic view illustrating a second water entry detection point arranged on the top of the bracelet according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an inflow detection device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Next, a water inlet detection method provided by an embodiment of the invention is described in detail. Fig. 1 is a flowchart of an underwater detection method according to an embodiment of the present invention, where the method includes:
s101: and acquiring the light intensity value collected by the ambient light sensor.
The method for detecting drowning provided by the embodiment of the invention can be suitable for detecting the drowning condition of the user. For convenience of introduction, a scene of detecting drowning of the user is taken as an example for introduction.
The light intensity collected by the ambient light sensor under the atmospheric environment and the water environment can be greatly different, and compared with the atmospheric environment, the light intensity collected under the water environment is lower. Therefore, in the embodiment of the invention, whether the user drowns or not can be identified depending on the light intensity value collected by the ambient light sensor.
S102: and judging whether the duration time of the light intensity value lower than the preset threshold reaches a preset time limit value or not.
After the ambient light sensor enters water, the intensity of ambient light around the ambient light sensor is weakened, so that the value of the collected light intensity value is reduced. In the embodiment of the invention, the preset threshold value can be set depending on the loss condition of the light intensity value collected by the ambient light sensor in the water environment.
For example, assume that the ambient light sensor collects a light intensity value a in the current atmospheric environment, and the unit of the light intensity value is lux. After the ambient light sensor enters water under the illumination intensity of the atmospheric environment, the illumination intensity can be weakened, seawater, water in a swimming pool and tap water are used as detection objects, the illumination intensity is respectively lost by a%, b% and c% when the ambient light sensor enters the three liquids, the minimum value is used as a basis for calculating a preset threshold value, the a% is assumed to be the minimum value, and the illumination intensity detected after the ambient light sensor enters water is A-A a%, so that the A-A a% can be used as the preset threshold value.
In consideration of the fact that in practical application, sudden shielding of the ambient light sensor may cause sudden change of the collected light intensity value, rather than reduction of the light intensity value caused by the entering of the ambient light sensor into water. Therefore, in the embodiment of the present invention, in order to reduce the misjudgment rate of the water entry detection, the duration of the light intensity value being lower than the preset threshold may be judged.
The value of the preset time limit can be set according to actual requirements, for example, the preset time limit can be set to 10 seconds.
When the duration that the light intensity value is lower than the preset threshold reaches the preset time limit, it indicates that the ambient light sensor may be in the water environment at this time. In order to improve the accuracy of the inflow detection, S103 may be further performed.
S103: and judging whether the voltage value of the water inlet detection point is matched with a preset voltage value or not.
In the embodiment of the invention, the water inlet detection point can be composed of a power supply and a resistor; the preset voltage value can be obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point.
The preset voltage value is used for representing the voltage value corresponding to the water-entering detection point in the atmospheric environment. If the voltage value of the water entry detection point does not match the preset voltage value, it indicates that the water entry detection point is in the water environment, and then S104 may be executed.
S104: and outputting drowning prompt information.
In the embodiment of the invention, the controller, the ambient light sensor, the prompting component for outputting drowning prompting information and the water entry detection point formed by the power supply and the resistor can be combined into a portable device, and a user can wear the portable device when playing a wading project, so that the portable device can timely detect the drowning condition of the user.
In practical applications, the portable device may be provided in the form of a bracelet, so as to be worn by a user. In order to further improve the accuracy of the detection of the water-in detection points, the water-in detection points can be respectively arranged at the top and the bottom of the portable device. The position of the arm of the user is the bottom of the portable device, and the position corresponding to the bottom and exposed outside is the top of the portable device. A first water entry detection point may be provided at the bottom of the portable device and a second water entry detection point may be provided at the top of the portable device.
Fig. 2 is a schematic block diagram of a portable device according to an embodiment of the present invention, where in fig. 2, a Micro Control Unit (MCU) is used as a controller, a display screen is used as a prompt component, the MCU is respectively connected to the display screen and an ambient light sensor, and the display screen can display drowning prompt information for a user. P1 and P2 in FIG. 2 are used as the first entry point, namely entry point 1; first water detection pointThe power supply is V1, the power supply V1 supplies power to a resistor R1 and a resistor R2 respectively, wherein, under the atmospheric environment, the voltage value corresponding to the first water-entering detection point is VNot entering water 1In the embodiment of the present invention, the voltage value corresponding to the first water entry detection point in the atmospheric environment may be set as the first threshold value V1 × R2/(R1+ R2). When the first water-entering detection point enters the water environment, the divider resistance value is changed because the divider resistance R2 is connected with the water in parallel, and theoretically, the first voltage value V of the first water-entering detection point at the momentEntering water 1＝V1*R2*RWater (W)/(R2+RWater (W))/{R1+R2*RWater (W)/(R2+RWater (W))}. When V isNot entering water 1≠VWhen entering water 1That is, the first voltage value is not equal to the preset first threshold, and at this time, the voltage value of the second water entry detection point may be further determined. The above formula for calculating the voltage value is to illustrate the variation of the first voltage value at the first water entry detection point under the atmospheric environment and the water environment. In practical application, the MCU can directly obtain the first voltage value corresponding to the first water inlet detection point without calculating according to the above formula.
Fig. 3a is a schematic diagram of a bracelet bottom provided with a first water-entering detection point according to an embodiment of the present invention, in fig. 3a, P1 and P2 are two pins constituting the first water-entering detection point, and P1 and P2 correspond to P1 and P2 in fig. 2. Fig. 3b is a schematic diagram illustrating a second water-entry detection point disposed on the top of the bracelet according to an embodiment of the present invention, in fig. 3b, P3 and P4 are two pins constituting the second water-entry detection point, and P3 and P4 correspond to P3 and P4 in fig. 2.
In combination with an actual application scene, the bottom of the portable device is easy to contact with water, and when a user drowns, the top of the portable device is also in a water environment. Therefore, in a specific implementation, when the first voltage value of the first water entry detection point is not equal to the preset first threshold, the second voltage value of the second water entry detection point can be acquired; and the second water inlet detection point is a water inlet detection point arranged at the top of the device. And judging whether the second voltage value is equal to a preset second threshold value or not. If the second voltage value is not equal to the preset second threshold value, drowning prompt information can be output.
P3 and P4 in FIG. 2 are used as the second entry detection point, namely entry detection point 2; the power supply of the second water detection point is V2, the power supply V2 supplies power to the resistor R3 and the resistor R4 respectively, wherein the voltage value corresponding to the second water detection point is V under the atmospheric environmentNot entering water 2In the embodiment of the present invention, the voltage value corresponding to the second water entry detection point in the atmospheric environment may be used as the second threshold value (V2 × R4/(R3+ R4)). When the second water-entering detection point enters the water environment, the divider resistance value is changed because the divider resistance R4 is connected with the water in parallel, and theoretically, the second voltage value V of the second water-entering detection point at the momentInto water 2＝V2*R4*RWater (W)/(R4+RWater (W))/{R3+R4*RWater (W)/(R4+RWater (W))}. When V isNot entering water 2≠VWhen entering water 2That is, the second voltage value is not equal to the preset second threshold, and at this time, drowning prompt information can be output.
According to the technical scheme, the light intensity value collected by the ambient light sensor is obtained; the light intensity collected by the ambient light sensor under the atmospheric environment and the water environment can be greatly different, and compared with the atmospheric environment, the light intensity collected under the water environment is lower. Therefore, whether the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value or not can be judged; if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, it indicates that the ambient light sensor may be in the water environment at the moment. In order to improve the accuracy of the water inlet detection, whether the voltage value of the water inlet detection point is matched with a preset voltage value can be further judged; wherein, the water-entering detection point can be composed of a power supply and a resistor; the preset voltage value can be obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water entry detection point, and the preset voltage value is used for indicating the voltage value corresponding to the water entry detection point in the atmospheric environment. If the voltage value of the water entry detection point is not matched with the preset voltage value, the water entry detection point is in the water environment at the moment, and at the moment, drowning prompt information can be output. In the technical scheme, the condition that sudden shielding causes sudden change of the light intensity value collected by the ambient light sensor can be effectively eliminated by detecting the duration time that the light intensity value is lower than the preset threshold value, and the misjudgment rate of water entering detection is reduced. And on the basis of detecting the light intensity value, the voltage value of the water-entering detection point is further judged, and the accuracy of detecting the water-entering condition is improved while the water-entering condition is ensured to be detected in time.
In order to more accurately know the drowning condition of a drowner, in the embodiment of the invention, the water depth barometer can be arranged, and after the voltage value of the water entry detection point is not matched with the preset voltage value, the controller can trigger the water depth barometer to acquire the current water entry depth information, so that the controller can acquire the water entry depth information acquired by the water depth barometer.
Besides the underwater depth information, in the embodiment of the invention, after the light intensity value collected by the ambient light sensor is obtained, when the light intensity value is detected to be lower than the preset threshold value, the timing function is started; correspondingly, after the underwater depth information acquired by the water depth barometer is acquired, the time difference between the time of acquiring the underwater depth information and the time of starting the timing function is calculated, and the time difference is used as drowning time.
Through the income depth information and the drowning time of gathering drowned person, can be convenient for the staff in time know the drowned condition of drowned person's present to timely effectual expansion rescue work.
In practical application, in order to facilitate other persons except a drowner to find the drowning condition in time, the portable device worn by the drowner can establish communication connection with the terminal device, so as to report the drowning state information to the terminal device; wherein, the drowning state information may include information of the depth of entry and the time of drowning.
The terminal device may be an intelligent device used by a worker or a family member of a drowner, for example, a notebook computer or a smart phone.
Drowned state information such as the degree of depth information of entrying, drowned time through gathering drowned person to in time feed back drowned state information to terminal equipment, the user that can be convenient for terminal equipment in time discovers the drowned condition of user, thereby in time rescues, has improved the security that the project of wading played.
Fig. 4 is a schematic structural diagram of an entry detection device according to an embodiment of the present invention, including a controller 1, an ambient light sensor 2, a prompt component 3, and an entry detection point 4 disposed on a surface of the entry detection device; wherein, the water-entering detection point 4 consists of a power supply and a resistor;
the controller 1 is connected with the ambient light sensor 2 and is used for acquiring a light intensity value acquired by the ambient light sensor 2; judging whether the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value or not;
the controller 1 is respectively connected with the water inlet detection point 4 and the prompting component 3 and is used for judging whether the voltage value of the water inlet detection point 4 is matched with a preset voltage value or not if the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value; if the voltage value of the water-entering detection point 4 is not matched with the preset voltage value, triggering the prompt component 3 to output drowning prompt information; the preset voltage value is calculated according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point 4.
Optionally, the water entry detection points 4 comprise a first water entry detection point 4 arranged at the bottom of the water entry detection device and a second water entry detection point 4 arranged at the top of the water entry detection device;
the controller 1 is specifically configured to obtain a first voltage value of the first water entry detection point 4; judging whether the first voltage value is equal to a preset first threshold value or not; if the first voltage value is not equal to the preset first threshold value, acquiring a second voltage value of the second water-entering detection point 4; judging whether the second voltage value is equal to a preset second threshold value or not; if the first voltage value is not equal to the preset first threshold value, the prompt component 3 is triggered to output drowning prompt information.
Optionally, a water depth barometer is also included;
the controller 1 is connected with the water depth barometer and used for triggering the water depth barometer to acquire the water depth information after the voltage value of the water entry detection point 4 is not matched with the preset voltage value.
Optionally, a timer is further included;
the controller 1 is connected with the timer and is used for triggering the timer to start a timing function when the light intensity value is detected to be lower than a preset threshold value; after the underwater depth information acquired by the water depth barometer is acquired, calculating a time difference value between the time when the underwater depth information is acquired and the time when the timing function is started, and taking the time difference value as drowning time.
Optionally, the system further comprises a terminal device;
the controller 1 is in communication connection with the terminal equipment and is used for reporting drowning state information to the terminal equipment after the voltage value of the water inlet detection point 4 is not matched with a preset voltage value; wherein, drowning state information includes the depth information of entrying and drowning time.
The description of the features in the embodiment corresponding to fig. 4 may refer to the related description of the embodiment corresponding to fig. 1, and is not repeated here.
According to the technical scheme, the light intensity value collected by the ambient light sensor is obtained; the light intensity collected by the ambient light sensor under the atmospheric environment and the water environment can be greatly different, and compared with the atmospheric environment, the light intensity collected under the water environment is lower. Therefore, whether the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value or not can be judged; if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, it indicates that the ambient light sensor may be in the water environment at the moment. In order to improve the accuracy of the water inlet detection, whether the voltage value of the water inlet detection point is matched with a preset voltage value can be further judged; wherein, the water-entering detection point can be composed of a power supply and a resistor; the preset voltage value can be obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water entry detection point, and the preset voltage value is used for indicating the voltage value corresponding to the water entry detection point in the atmospheric environment. If the voltage value of the water entry detection point is not matched with the preset voltage value, the water entry detection point is in the water environment at the moment, and at the moment, drowning prompt information can be output. In the technical scheme, the condition that sudden shielding causes sudden change of the light intensity value collected by the ambient light sensor can be effectively eliminated by detecting the duration time that the light intensity value is lower than the preset threshold value, and the misjudgment rate of water entering detection is reduced. And on the basis of detecting the light intensity value, the voltage value of the water-entering detection point is further judged, and the accuracy of detecting the water-entering condition is improved while the water-entering condition is ensured to be detected in time.
The embodiment of the invention also provides wearable equipment which comprises the water inlet detection device in any embodiment.
In the embodiment of the present invention, the specific form of the wearable device is not limited. For example, the wearable device may be a smart bracelet, a smart watch, smart glasses, or the like.
The method, the device and the wearable device for detecting water entry provided by the embodiment of the invention are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Claims (10)
1. An entry detection method, comprising:
acquiring a light intensity value collected by an ambient light sensor;
judging whether the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value or not;
if the duration time that the light intensity value is lower than the preset threshold value reaches the preset time limit value, judging whether the voltage value of the water-entering detection point is matched with the preset voltage value; the water inlet detection point is composed of a power supply and a resistor; the preset voltage value is obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point;
and if the voltage value of the water entering detection point is not matched with the preset voltage value, outputting drowning prompt information.
2. The method for detecting water entry according to claim 1, wherein said determining whether the voltage value at the water entry detection point matches a preset voltage value comprises:
acquiring a first voltage value of a first water inlet detection point; the first water inlet detection point is a water inlet detection point arranged at the bottom of the device;
judging whether the first voltage value is equal to a preset first threshold value or not;
if the first voltage value is not equal to a preset first threshold value, acquiring a second voltage value of a second water inlet detection point; the second water inlet detection point is a water inlet detection point arranged at the top of the device;
judging whether the second voltage value is equal to a preset second threshold value or not;
and if the second voltage value is not equal to a preset second threshold value, executing the step of outputting drowning prompt information.
3. The method as claimed in claim 1, further comprising, after the step of detecting the water entry, if the voltage value at the water entry detection point does not match a preset voltage value:
and acquiring the underwater depth information acquired by the water depth barometer.
4. The method of claim 3, further comprising, after said obtaining the light intensity value collected by the ambient light sensor:
when the light intensity value is detected to be lower than a preset threshold value, starting a timing function;
correspondingly, after the acquiring the underwater depth information collected by the underwater barometer, the method further comprises the following steps:
and calculating a time difference value between the time when the entry depth information is acquired and the time when the timing function is started, and taking the time difference value as drowning time.
5. The method as claimed in claim 4, further comprising, after the step of detecting the voltage value of the water entry point does not match a preset voltage value:
reporting drowning status information to the terminal device; wherein, drowning state information includes the depth information of entrying and drowning time.
6. The water inlet detection device is characterized by comprising a controller, an ambient light sensor, a prompting component and a water inlet detection point arranged on the surface of the water inlet detection device; the water inlet detection point is composed of a power supply and a resistor;
the controller is connected with the ambient light sensor and is used for acquiring a light intensity value acquired by the ambient light sensor; judging whether the duration time of the light intensity value lower than a preset threshold value reaches a preset time limit value or not;
the controller is respectively connected with the water inlet detection point and the prompting component and is used for judging whether the voltage value of the water inlet detection point is matched with a preset voltage value or not if the duration time that the light intensity value is lower than a preset threshold value reaches a preset time limit value; if the voltage value of the water entry detection point is not matched with the preset voltage value, triggering the prompt component to output drowning prompt information; and the preset voltage value is obtained by calculation according to the voltage value of the power supply and the resistance corresponding to the water inlet detection point.
7. The water ingress detection device of claim 6 wherein the water ingress detection points comprise a first water ingress detection point disposed at the bottom of the water ingress detection device and a second water ingress detection point disposed at the top of the water ingress detection device;
the controller is specifically used for acquiring a first voltage value of the first water inlet detection point; judging whether the first voltage value is equal to a preset first threshold value or not; if the first voltage value is not equal to a preset first threshold value, acquiring a second voltage value of a second water inlet detection point; judging whether the second voltage value is equal to a preset second threshold value or not; and if the first voltage value is not equal to a preset first threshold value, triggering the prompt component to output drowning prompt information.
8. The water ingress detection apparatus of claim 6, further comprising a water depth barometer;
the controller is connected with the water depth barometer and used for triggering the water depth barometer to acquire the water depth information after the voltage value of the water entry detection point is not matched with the preset voltage value.
9. The water ingress detection device of claim 8, further comprising a timer;
the controller is connected with the timer and used for triggering the timer to start a timing function when the light intensity value is detected to be lower than a preset threshold value; after the underwater depth information collected by the water depth barometer is obtained, the time difference value between the time when the underwater depth information is obtained and the time when the timing function is started is calculated, and the time difference value is used as drowning time.
10. Wearable device, characterized in that it comprises an intrusion detection device according to any of claims 6-9.
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