CN109341669A

CN109341669A - Water-depth measurement method and device

Info

Publication number: CN109341669A
Application number: CN201811290925.9A
Authority: CN
Inventors: 廖泽宇
Original assignee: Guangdong Genius Technology Co Ltd
Current assignee: Guangdong Genius Technology Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2019-02-15

Abstract

The present invention provides a kind of water-depth measurement method and devices, applied to wearable device, the water-depth measurement method includes: the environment that detection is presently in, if judgement is currently in water environment, the density of water is obtained according to the pressure difference of the height liquid level for the pressure sensor detection being placed in wearable device；First distance of the wearable device apart from the water surface is obtained according to the density of water；Use the second distance that ultrasonic sensor measurement wearable device distance is water-bed；The depth of water that wearable device is presently in position is obtained according to first distance and second distance, completes the measurement of the depth of water.Its density for calculating water in such a way that pressure sensor detects the pressure difference of height liquid level first, first distance of the wearable device measured later by pressure sensor apart from the water surface, its calculating that first distance is carried out according to the real density of water, the density of pure water is used to be calculated as the density of current water in compared with the prior art, it is obviously more accurate that first distance is calculated in this method.

Description

Water-depth measurement method and device

Technical field

The present invention relates to intelligence to dress technical field, espespecially a kind of water-depth measurement method and device.

Background technique

Wearable device is the portable device that directly can be worn or be incorporated on clothes/accessory, in smart phone Innovative space gradually narrow and the market growth close to saturation in the case where, intelligent wearable device is as under intelligent terminal industry One hot spot is accepted by market extensively.Each manufacturer provides, and there is the wearable gas producing formation of different application and service function to go out not Thoroughly, wherein the monitoring wearable product of class occupies bigger ratio, e.g., for guarding the smartwatch of child position, is used for The bracelet etc. of monitoring moving state.In the wearing product of a great variety, the product based on children and old monitoring be accounting very Big a part has health supervision for old man such as the product with position monitoring, motion monitoring function of children The product etc. of function.

Currently, the wearable device that early warning can be monitored to the depth of water has been had already appeared, when the depth of water is more than preset When depth, issue early warning, remind risk, avoid the occurrence of the risks such as drowned, and be typically all by single hydraulic pressure sensor or Person realizes the measurement of the depth of water by way of emitting ultrasonic wave.In the technical solution to be sounded the depth of the water using hydraulic pressure sensor, survey The result is that height of the wearable device present position apart from the water surface, and use the density of pure water as current water Density calculated, as a result obviously have deviation.In the technical solution using the transmitting ultrasonic measurement depth of water, the knot that measures Fruit is the water-bed depth of wearable device present position distance.It is non-constant due to wearer's motion state in water, The reference value of the depth is simultaneously little.

Summary of the invention

The object of the present invention is to provide a kind of water-depth measurement method and devices, detect height liquid level by pressure sensor The mode of pressure difference calculates the density of water, so that is obtained is more accurate apart from the first distance of the water surface, to promote the survey of the depth of water The accuracy of amount.

Technical solution provided by the invention is as follows:

The present invention provides a kind of water-depth measurement method, is applied to wearable device, comprising:

The environment being presently in is detected, if judgement is currently in water environment, according to the pressure being placed in wearable device The pressure difference of the height liquid level of force snesor detection obtains the density of water；

First distance of the wearable device apart from the water surface is obtained according to the density of water；

Use the second distance that ultrasonic sensor measurement wearable device distance is water-bed；

The depth of water that wearable device is presently in position is obtained according to the first distance and second distance, completes the depth of water Measurement.

Preferably, the close of water is obtained according to the pressure difference of the height liquid level for the pressure sensor detection being placed in wearable device Degree further comprises:

The pressure value that pressure sensor detects is acquired, two use positioned at different location are equipped in the wearable device In the pressure sensor of detection water density；

Pressure difference is calculated according to the pressure value that two pressure sensors detect；

Pressure difference is obtained according to the active area of hydraulic pressure in the pressure difference and pressure sensor being calculated；

The density of water is obtained according to the difference in height of the pressure difference and two pressure sensors in wearable device；

Or, the density of water is obtained according to the pressure difference of the height liquid level for the pressure sensor detection being placed in wearable device, Further comprise:

The pressure difference that acquisition pressure sensor detects, the pressure sensor are double-flange pressure sensor；

Pressure difference is obtained according to the active area of hydraulic pressure in the pressure difference and pressure sensor；

The density of water is obtained according to the difference in height for measuring both ends in the pressure difference and pressure sensor.

Preferably, first distance of the wearable device apart from the water surface is obtained according to the density of water, further comprises:

Acquire the pressure value of the preset pressure sensor detection for measuring first distance；

The pressure sensor position is obtained according to the active area of hydraulic pressure in the pressure value and the pressure sensor Pressure；

The pressure of the pressure sensor position is subtracted into atmospheric pressure and obtains difference；

First distance of the wearable device apart from the water surface is obtained according to the density of the difference and water.

Preferably, the depth of water that wearable device is presently in position is obtained according to the first distance and second distance, it is complete After the measurement of the depth of water, further includes:

The depth of water of measurement is compared with default depth of water threshold value, if the depth of water of measurement reaches depth of water threshold value, according to the water Corresponding warning information is issued as deep as the warning level arrived, reminds wearer；The default depth of water threshold value is according to the body of wearer High setting.

Preferably, corresponding warning information is issued according to the warning level that the depth of water reaches, further comprises:

By corresponding early warning acoustic information informing wearer by way of osteoacusis and/or will be pre- by way of vibration Alert information informs wearer.

The present invention also provides a kind of water-depth measurement devices, are applied to wearable device, comprising:

Context detection module, for detecting the environment being presently in；

Pressure sensor is placed in wearable device, when environment monitoring module judgement be currently in water environment, the pressure The pressure difference of force snesor detection height liquid level；

Ultrasonic sensor is placed in wearable device, for emitting ultrasonic signal towards water-bed；

The pressure difference of computing module, the height liquid level for being detected according to pressure sensor obtains the density of water, according to calculating The density for the water that module is calculated obtains first distance of the wearable device apart from the water surface, according to being placed in wearable device The water-bed second distance of the ultrasonic measurement wearable device distance of ultrasonic sensor transmitting, and according to the first distance and Second distance obtains the depth of water that wearable device is presently in position, completes the measurement of the depth of water.

Preferably, in computing module, further comprise:

First pressure value acquisition unit, the pressure value detected for acquiring pressure sensor, in the wearable device It is used to detect the pressure sensor of water density equipped with two for being located at different location；

Pressure difference computing unit, for being detected according to collected two pressure sensors of the first pressure value acquisition unit To pressure value pressure difference is calculated；

First pressure difference computing unit, pressure difference and pressure sensor for being calculated according to the pressure difference computing unit Pressure difference is calculated in the active area of middle hydraulic pressure；

First water density computing unit, the pressure difference for being calculated according to the first pressure difference computing unit And the density of water is calculated in difference in height of two pressure sensors in wearable device；

Or, further comprising in computing module:

Pressure difference acquisition unit, the pressure difference detected for acquiring pressure sensor, the pressure sensor are double flange pressures Force snesor；

Second pressure difference computing unit, for according in the collected pressure difference of the pressure difference acquisition unit and pressure sensor Pressure difference is calculated in the active area of hydraulic pressure；

Second water density computing unit, pressure difference and pressure for being calculated according to the second pressure difference computing unit The density of water is calculated in the difference in height that both ends are measured in force snesor.

Preferably, in the computing module, further comprise:

Second pressure value acquisition unit, for acquiring the preset pressure sensor detection for measuring first distance Pressure value；

Pressure computing unit, pressure value and the pressure sensor for being acquired according to the second pressure value acquisition unit The active area of middle hydraulic pressure obtains the pressure of the pressure sensor position；

Third pressure difference computing unit, the pressure for the pressure sensor position that the pressure computing unit is calculated Subtracting atmospheric pressure obtains difference by force；

First distance computing unit, the densitometer of difference and water for being calculated according to third pressure difference computing unit Calculation obtains first distance of the wearable device apart from the water surface.

Preferably, in the water-depth measurement device further include:

Comparison module, the depth of water for computing module to be calculated are compared with default depth of water threshold value；

Warning module is issued according to the warning level that the depth of water reaches when comparison module judges that the depth of water reaches depth of water threshold value Corresponding warning information reminds wearer；The default depth of water threshold value is arranged according to the height of wearer.

Preferably, in the warning module, corresponding early warning acoustic information is informed into wearing by way of osteoacusis Person and/or warning information is informed into wearer by way of vibration.

The water-depth measurement method and device provided through the invention, can bring it is following at least one the utility model has the advantages that

1, the density of water is calculated in the present invention in such a way that pressure sensor detects the pressure difference of height liquid level first, later First distance of the wearable device measured by pressure sensor apart from the water surface, according to the real density of water carry out first away from From calculating, compared with the prior art in use the density of pure water as the density of current water and calculated for, this method It is obviously more accurate that first distance is calculated.

2, other than the first distance in the present invention in addition to measurement wearable device apart from the water surface, while passing through supersonic sensing Device measures the water-bed second distance of wearable device distance, and then obtains the depth value of water according to first distance and second distance, And early warning is carried out according to the depth of water, compared with the prior art in only carried out for early warning by first distance or second distance, should Method obviously more has reference value, guarantees safety of the wearer in water environment.

3, early warning is carried out in the present invention by way of vibration, and/or by the way that early warning acoustic information is passed through osteoacusis Mode carries out early warning, and wearer is allowed to know the current depth of water and harm in time, further improves the safety of wearer in water Performance.

Detailed description of the invention

Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to a kind of water-depth measurement method and dress Above-mentioned characteristic, technical characteristic, advantage and its implementation set are further described.

Fig. 1 is the flow chart of one embodiment of water-depth measurement method in the present invention；

Fig. 2 is the flow chart of second embodiment of water-depth measurement method in the present invention；

Fig. 3 is the flow chart of the third embodiment of water-depth measurement method in the present invention；

Fig. 4 is the flow chart of the 4th embodiment of water-depth measurement method in the present invention；

Fig. 5 is the flow chart of the 7th embodiment of water-depth measurement method in the present invention；

Fig. 6 is the structural schematic diagram of the tenth embodiment of water-depth measurement device in the present invention；

Fig. 7 is the structural schematic diagram of the tenth one embodiment of water-depth measurement device in the present invention；

Fig. 8 is the structural schematic diagram of the 12nd embodiment of water-depth measurement device in the present invention；

Fig. 9 is the structural schematic diagram of the 13rd embodiment of water-depth measurement device in the present invention；

Figure 10 is the structural schematic diagram of the 16th embodiment of water-depth measurement device in the present invention.

Drawing reference numeral explanation:

100- water-depth measurement device, 110- context detection module, 120- pressure sensor,

130- ultrasonic sensor, 140- computing module, 141- first pressure value acquisition unit,

142- pressure difference computing unit, 143- the first pressure difference computing unit, 144- the first water density computing unit,

145- pressure difference acquisition unit, 146- the second pressure difference computing unit, 147- the second water density computing unit,

148- second pressure value acquisition unit, 149- pressure computing unit, 151- third pressure difference computing unit,

152- first distance computing unit, 150- comparison module, 160- warning module.

Specific embodiment

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below Specific embodiments of the present invention.It should be evident that drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others Attached drawing, and obtain other embodiments.

To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented Its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated " only this ", can also indicate the situation of " more than one ".

The first embodiment of the present invention, as shown in Figure 1, a kind of water-depth measurement method, comprising:

S100 detects the environment being presently in, if judgement is currently in water environment, basis is placed in wearable device The pressure difference of height liquid level of pressure sensor detection obtain the density of water；

S200 obtains first distance of the wearable device apart from the water surface according to the density of water；

Second distance S300 water-bed using ultrasonic sensor measurement wearable device distance；

S400 obtains the depth of water that wearable device is presently in position according to first distance and second distance, completes the depth of water Measurement.

In the present embodiment, which is applied to wearable device, which can be for wrist The products such as smartwatch, Intelligent bracelet for support, or be the products such as the intelligent swimming glasses that head is support.In addition, Configured with the environmental detection sensor for environment measuring, the pressure sensor for detecting levels pressure in the wearable device And except the ultrasonic sensor for emitting ultrasonic signal towards the bottom, while configured with for controlling wearable device reality The central processing unit of existing depth of water detection, receives environmental detection sensor, the number that pressure sensor and ultrasonic sensor detect According to and handled.

When wearer correctly wears and normally start wearable device, wearable device starts the ring that detection is presently in Whether border, environment here are specially in water environment, pass through the environmental detection sensor being pre-configured in wearable device It realizes.In practical applications, the environmental detection sensor can (will test that electrode is respectively arranged in advance can for water detecting electrode On the contact point of two sides of wearable device shell), during environment measuring, if it is detected that two on wearable device shell The electrode conduction of a side then determines that wearable device is currently in water environment, into subsequent water-depth measurement step, control Wearable device opens water pressure sensing function；Otherwise determine to be not currently in water environment, do not enter subsequent step.Here water Environment is that swimming pool, river, sea etc. can swim or there are the environment of a large amount of liquid waters.

After detecting that wearable device is currently in water environment, it is used to detect water according to being placed in wearable device The pressure difference of the height liquid level of the pressure sensor detection of density obtains the density of water, further wearable by being equally placed in later The pressure sensor for being used to measure apart from water surface distance in equipment measures first distance H₁.Measurement obtains first distance H₁Later, into One step measures the water-bed second distance H of wearable device distance by ultrasonic sensor₂。

In measurement second distance H₂During, controlling ultrasonic sensor, (towards water-bed), transmitting is super on gravity direction Acoustic signals simultaneously start timing t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor), works as ultrasonic wave Sensor stops timing t when receiving the ultrasonic signal returned via underwater reflection₂(via the ultrasonic wave in ultrasonic sensor Receiver receives reflected ultrasonic signal).With this spread speed v and ultrasonic wave letter by ultrasonic signal in water The half of number time transmitted in water calculates the wearable device water-bed second distance H of distance in the vertical direction₂, i.e. H₂ =v* (t₂-t₁)/2.Measurement obtains second distance H₂Later, that is, the depth of water H for being presently in position of wearable device has been determined_c, H_c=H₁+H₂, the detection of the depth of water is completed, and the value and its corresponding detection time are stored, is checked convenient for subsequent.

In the present embodiment, pressure sensor and ultrasonic sensor can be respectively arranged to the table of wearable device Face, and when wearer wears the wearable device and enters water environment, pressure sensor is upward (towards the direction of the water surface), ultrasonic wave Sensor is downward (towards water-bed direction).For the frequency of depth of water detection, can be set according to the actual situation, it is such as per second Once, every five seconds detection is primary or even detection in every 10 seconds is primary for detection, is not specifically limited here, in wearing, this can wear wearer It can be set when wearing equipment.

Second embodiment of the invention is the optimal enforcement example of above-mentioned first embodiment, as shown in Figure 2, comprising:

S110 detects the environment being presently in, if judgement is currently in water environment, acquisition pressure sensor is detected Pressure value is equipped with two positioned at different location in wearable device for detecting the pressure sensor of water density；

Pressure difference is calculated according to the pressure value that two pressure sensors detect in S120；

S130 obtains pressure difference according to the active area of hydraulic pressure in the pressure difference and pressure sensor being calculated；

S140 obtains the density of water according to the difference in height of pressure difference and two pressure sensors in wearable device；

In the present embodiment, when wearer correctly wears and normally starts wearable device, wearable device starts to examine The environment being presently in is surveyed, whether environment here is specially in water environment, by being pre-configured in wearable device Environmental detection sensor is realized.In practical applications, which (can will test electricity for water detecting electrode in advance Pole is respectively arranged on the contact point of two sides of wearable device shell), during environment measuring, if it is detected that can wear The electrode conduction of two sides on apparatus casing is worn, then determines that wearable device is currently in water environment, into subsequent water Deep measuring process.

Specifically, the pressure value F for being set to two pressure sensors induction of different location in wearable setting is received₁And F₂, And the difference for the pressure value that two pressure sensors detect is calculated, and obtain pressure differential deltap F=| F₁-F₂|；Later, according to the pressure difference and The active area S of hydraulic pressure in pressure sensor obtains the pressure difference Δ P=Δ F/S between two pressure sensors；Last basis Density p=Δ P/ (g* Δ of water is calculated in the difference in height Δ h of the pressure difference and two pressure sensors in wearable device H), wherein g is acceleration of gravity.Here, wearable device is correctly worn simultaneously in use, two pressure sensors in wearer Has difference in height Δ h in the wearable device, i.e. two pressure sensors cannot be arranged in same level.

In the calculating process of above-mentioned first distance, the hydraulic pressure active area for being based on two pressure sensors is identical, It is S；In other instances, when the hydraulic pressure active area of two pressure sensors is different, and respectively S₁And S₂When, then it is connecing Receive the pressure value F of two pressure sensors induction₁And F₂Later, the pressure values of two pressure sensors are calculated separately out immediately, P₁=F₁/S₁, P₂=F₂/S₂；Pressure difference Δ P=is calculated again later | P₁-P₂|；Finally according to the pressure difference and two pressure Density p=Δ P/ (g* Δ h), wherein g adds for gravity of water is calculated in difference in height Δ h of the sensor in wearable device Speed.

After obtaining the density of water, further by being equally placed in wearable device for measuring apart from water surface distance Pressure sensor measures first distance H₁, the water-bed second distance of wearable device distance is then measured by ultrasonic sensor H₂.In this course, control ultrasonic sensor emits ultrasonic signal and starts to count on gravity direction (towards water-bed) When t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor), when ultrasonic sensor is received via water Stop timing t when the reflected ultrasonic signal in bottom₂It (is reflected back via the ultrasonic receiver reception in ultrasonic sensor The ultrasonic signal come).With this by ultrasonic signal spread speed v in water and ultrasonic signal transmit in water when Between half, calculate the wearable device water-bed second distance H of distance in the vertical direction₂, i.e. H₂=v* (t₂-t₁)/2.It surveys Measure second distance H₂Later, that is, the depth of water H for being presently in position of wearable device has been determined_c, H_c=H₁+H₂, complete The detection of the depth of water.

Third embodiment of the invention is the optimal enforcement example of above-mentioned first embodiment, as shown in Figure 3, comprising:

S150 detects the environment being presently in, if judgement is currently in water environment, acquisition pressure sensor is detected Pressure difference, pressure sensor are double-flange pressure sensor；

S160 obtains pressure difference according to the active area of hydraulic pressure in pressure difference and pressure sensor；

S170 obtains the density of water according to the difference in height for measuring both ends in pressure difference and pressure sensor；

Specifically, receive be set to double-flange pressure sensor in wearable setting (measurement pressure sensor pressure at two ends it The transmitter of difference, has 2 pressure interfaces, respectively positive pressure side and negative pressure end, and under normal circumstances, the pressure of positive pressure side should be greater than The pressure at negative pressure end) induction pressure differential deltap F；Later, according to the active area of hydraulic pressure in the pressure difference and double-flange pressure sensor S obtains pressure difference Δ P=Δ F/S；Finally according to measuring both ends (above-mentioned positive pressure side and negative in the pressure difference and pressure sensor Pressure side) difference in height Δ h density p=Δ P/ (g* Δ h), wherein g is acceleration of gravity of water is calculated.

Fourth embodiment of the invention is the optimal enforcement example of above-mentioned first embodiment, as shown in Figure 4, comprising:

S210 acquires the pressure value of the preset pressure sensor detection for measuring first distance；

S220 obtains the pressure sensor position according to the active area of hydraulic pressure in pressure value and the pressure sensor Pressure；

The pressure of pressure sensor position is subtracted atmospheric pressure and obtains difference by S230；

S240 obtains first distance of the wearable device apart from the water surface according to the density of difference and water；

According to the pressure difference of the height liquid level for the pressure sensor detection for detecting water density being placed in wearable device After obtaining the density of water, the pressure value F of the preset pressure sensor detection for measuring first distance is received₃, and According to pressure value F₃And the active area S' of hydraulic pressure obtains the pressure P of the pressure sensor position in the pressure sensor₃ =F₃/S'.Since the pressure of pressure sensor position is atmospheric pressure P₀The sum of with the hydraulic pressure of present position depth, therefore The pressure of pressure sensor position is subtracted into atmospheric pressure later and obtains difference DELTA P'=P₃-P₀, and the difference is removed with this Gravity accelerates and obtains first distance H of the wearable device apart from the water surface with the density of water₁=Δ P'/(ρ * g).

Measurement obtains first distance H₁Later, the wearable device distance bottom is further measured by ultrasonic sensor Second distance H₂.Specifically, control ultrasonic sensor emits ultrasonic signal and starts to count on gravity direction (towards water-bed) When t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor), when ultrasonic sensor is received via water Stop timing t when the reflected ultrasonic signal in bottom₂It (is reflected back via the ultrasonic receiver reception in ultrasonic sensor The ultrasonic signal come).With this by ultrasonic signal spread speed v in water and ultrasonic signal transmit in water when Between half, calculate the wearable device water-bed second distance H of distance in the vertical direction₂, i.e. H₂=v* (t₂-t₁)/2.It surveys Measure second distance H₂Later, that is, the depth of water H for being presently in position of wearable device has been determined_c, H_c=H₁+H₂, complete The detection of the depth of water.

In conjunction with the present embodiment and second embodiment obtain the 5th kind of embodiment (in this embodiment, for measure first away from From pressure sensor can may not be two for two for detecting one in the pressure sensors of water density and be used for One in the pressure sensor of water density is detected, is set according to the actual situation), it is obtained in conjunction with this implementation and 3rd embodiment To the 6th kind of embodiment, do not repeat them here.

Seventh embodiment of the invention is the optimal enforcement example of above-mentioned first embodiment, as shown in Figure 5, comprising:

S400 obtains the depth of water that wearable device is presently in position according to first distance and second distance, completes the depth of water Measurement；

The depth of water of measurement is compared by S500 with default depth of water threshold value, if the depth of water of measurement reaches depth of water threshold value, according to The warning level that the depth of water reaches issues corresponding warning information, reminds wearer；Depth of water threshold value is preset according to the body of wearer High setting.

In the present embodiment, when wearer correctly wears and normally starts wearable device, wearable device is detected After being currently in water environment, according to the height for the pressure sensor detection for detecting water density being placed in wearable device The pressure difference of low liquid level obtains the density of water, later further by be equally placed in wearable device for measure apart from the water surface away from From pressure sensor measure first distance H₁.Measurement obtains first distance H₁Later, it is further measured by ultrasonic sensor The water-bed second distance H of wearable device distance₂, the depth of water is calculated with this.

After the depth for measuring water, which is compared with default depth of water threshold value, when the depth of water reaches depth of water threshold value, Then issue corresponding warning information.Since everyone height is variant, especially adult and child height differs greatly, be with Depth of water threshold value, which is arranged, according to the height of wearer could really realize the purpose of early warning.It, can be with when depth of water threshold value is set Different warning levels is set according to the percentage that the depth of water reaches height, e.g., when the depth of water reaches the 30% of height, is set as level-one Early warning indicates wearer's wet water；When the depth of water reaches the 50% of height, be set as second level early warning, instruction wearer start into Enter deepwater regions；The depth of water reaches the 70% of height, is set as three-level early warning, and instruction wearer comes into deep water position；The depth of water 100% or even the superelevation height for reaching height, are set as level Four early warning, and instruction wearer may have already appeared drowned situation. Also it is referred to height, different warning levels is set according to the depth of water, e.g., as wearer height 180cm (centimetre), when the depth of water reaches To 50cm, it is set as level-one early warning, indicates wearer's wet water；When the depth of water reaches 90cm, it is set as second level early warning, instruction is worn Wearer initially enters deepwater regions；When the depth of water reaches 130cm, it is set as three-level early warning, instruction wearer comes into deep water level It sets；It is even more than 180cm when the depth of water reaches 180cm, instruction wearer may have already appeared drowned situation.

Warning information corresponding for each warning level, is set according to different warning levels, e.g., works as warning information By the position output of vibration signal close to wearer's skin, then to set different vibration frequencies according to different warning levels Wearer is prompted, warning level is higher, and vibration frequency is higher, and with this, wearer can perceive current relate in time Regimen condition.

In the present embodiment, pre-warning signal is transmitted except through the mode of vibration, can also be incited somebody to action by way of osteoacusis Early warning voice messaging passes to wearer, and different early warning voice messagings is set previously according to different warning grades, e.g., for Level-one early warning, setting early warning voice messaging " you wet water "；For second level early warning, setting early warning voice messaging, " you will enter Deepwater regions "；For three-level early warning, set early warning voice messaging " you have entered deepwater regions "；For level Four early warning, setting is pre- Alert voice messaging " you are likely to occur drowned ".Sound wave is transmitted to a kind of mode of inner ear when osteoacusis, by means of certain Jie Matter (temporal bone on head) carries out the propagation of sound, is finally no longer needed in a manner of sound wave directly by sound conduction to auditory nerve Ear-drum is first passed to by air, then reaches auditory nerve.In order to realize the osteoacusis of early warning voice messaging, in wearable device Bluetooth module is set, and purpose can be realized in the bluetooth headset that wearer's wearing communicates connection.In this course, without logical Ear canal transmitting sound is crossed, does not also just have to worry that extraneous noisy sound will affect reception of the wearer to early warning voice messaging；Together When, wearer can also hear the ambient sound of surrounding simultaneously, be not at " ear is blind " state, effectively prevent some dangerous feelings The generation of condition while improving wearer's safety, can more accurately receive early warning voice messaging.

In this example, wearable device has drowned monitoring function, defeated in wearable device when receiving wearer What is entered is wirelessly connected at least for the open command of drowned monitoring function or receiving to establish with wearable device in advance When what any one terminal device in one terminal device (monitoring device) was sent is directed to the open command of drowned monitoring function, Wearable device opens its drowned monitoring function according to the open command received.

When the current depth of water is greater than depth of water predetermined depth threshold value, wearable device further judges the wearing of wearable device There is potential danger in water environment locating for person, and (monitor supervision platform, such as 110 report at least one pre-set early warning platform Alert platform, 120 emergency platforms etc.) corresponding pre-warning signal is sent, early warning platform, which is triggered, to monitoring personnel makes a sound early warning, when When monitoring personnel determines that the wearer of wearable device is safe condition, the manually controllable early warning platform of monitoring personnel stops issuing Sound early warning；It can also be sent out to the terminal device (such as mobile phone, the end PC) being wirelessly connected is established with wearable device in advance Monitoring personnel is reminded in a manner of sound-light alarm after sending pre-warning signal, terminal device to receive pre-warning signal.For warning information Transmission form, can be realized in a manner of short message mode, instant communication message or in the way of call request, wherein when to exhale When the mode of request being made to send pre-warning signal, after being successfully established call connection, wearable device plays emergency voice automatically and makees For call voice of crying for help.It can also include locating module in wearable device, it is pre- when needing to send to early warning platform/terminal device When alert information, while current location information being sent, convenient for rescue.

The 8th kind of embodiment is obtained in conjunction with the present embodiment and second embodiment, obtains the in conjunction with this implementation and 3rd embodiment Nine kinds of embodiments, do not repeat them here.

Above-mentioned first embodiment is improved to the 9th embodiment, wearable device may be used also other than detecting the depth of water To detect the time into water, specifically, when detecting that wearable device is in water environment, pressure sensor starts to detect pressure Value, the timer record time add up timing until pressure sensing as reference time point, and based on the reference time point When device can't detect water pressure, stops timing, obtain into water duration and stored.It before this, can also be according to detecting Enter water duration setting warning information, avoid wearer's overlong time or because overlong time in water damages wearable set in water It is standby.When warning information is arranged, it can be combined with the depth of water and enter water duration and set according to the actual situation together.In addition, also Water temperature can be detected according to predeterminated frequency, be incorporated into water time setting warning information, avoid wearer in the lower environment of water temperature Middle overlong time influences body or because of the overlong time damage wearable device in the lower environment of water temperature.In wearable device also It may include locating module, when needing to send warning information to early warning platform/terminal device, while by current location information It sends, convenient for rescue.

Tenth embodiment of the invention, as shown in fig. 6, a kind of water-depth measurement device 100, comprising:

Context detection module 110, for detecting the environment being presently in；

Pressure sensor 120, is placed in wearable device, when environment monitoring module judgement be currently in water environment, press The pressure difference of the detection height liquid level of force snesor 120；

Ultrasonic sensor 130, is placed in wearable device, for emitting ultrasonic signal towards water-bed；

The pressure difference of computing module 140, the height liquid level for being detected according to pressure sensor 120 obtains the density of water, root The density for the water being calculated according to computing module obtains first distance of the wearable device apart from the water surface, according to being placed in wearable set The water-bed second distance of the ultrasonic measurement wearable device distance that ultrasonic sensor 130 in standby emits, and according to first Distance and second distance obtain the depth of water that wearable device is presently in position, complete the measurement of the depth of water.

In the present embodiment, which is applied to wearable device, which can be for hand Wrist is the products such as smartwatch, the Intelligent bracelet of support, or is the products such as the intelligent swimming glasses that head is support.In addition, It is passed in the wearable device configured with the context detection module 110 for environment measuring, the pressure for detecting levels pressure Sensor 120 and for the ultrasonic sensor 130 towards water-bed transmitting ultrasonic signal except, while configured with for control can Wearable device realizes the central processing unit of depth of water detection, receives context detection module 110, pressure sensor 120 and ultrasonic wave and passes Data that sensor 130 detects simultaneously are handled.

When wearer correctly wears and normally start wearable device, context detection module 110 starts to detect current institute Whether the environment at place, environment here are specially in water environment, pass through the environment measuring being pre-configured in wearable device Module 110 is realized.In practical applications, which (can will test electrode difference for water detecting electrode in advance It is set on the contact point of two sides of wearable device shell), during environment measuring, if it is detected that wearable device The electrode conduction of two sides on shell then determines that wearable device is currently in water environment, into subsequent water-depth measurement Step, control wearable device open water pressure sensing function；Otherwise determine to be not currently in water environment, do not enter subsequent step Suddenly.Here water environment is that swimming pool, river, sea etc. can swim or there are the environment of a large amount of liquid waters.

After detecting that wearable device is currently in water environment, computing module 140 is according to being placed in wearable device The pressure difference of height liquid level of the pressure sensor detection for detecting water density obtain the density of water, later further by same Sample is placed in the pressure sensor in wearable device being used to measure apart from water surface distance and first distance H is calculated₁.Measurement obtains First distance H₁Later, the water-bed second distance H of wearable device distance is further calculated by ultrasonic sensor 130₂。

In measurement second distance H₂During, control the hair (towards water-bed) on gravity direction of ultrasonic sensor 130 It penetrates ultrasonic signal and starts timing t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor 130), Stop timing t when ultrasonic sensor 130 receives the ultrasonic signal returned via underwater reflection₂(via supersonic sensing Ultrasonic receiver in device 130 receives reflected ultrasonic signal).Pass through ultrasonic signal with this computing module 140 The half for the time that spread speed v and ultrasonic signal in water is transmitted in water calculates wearable device in vertical side The water-bed second distance H of distance upwards₂, i.e. H₂=v* (t₂-t₁)/2.Second distance H is calculated₂Later, that is, having determined can wear Wear the depth of water H for being presently in position of equipment_c, H_c=H₁+H₂, complete the detection of the depth of water, and by the value and its corresponding detection Time is stored, and is checked convenient for subsequent.

In the present embodiment, pressure sensor 120 and ultrasonic sensor 130 can be respectively arranged at wearable device Surface, and when wearer wears the wearable device and enters water environment, pressure sensor 120 is upward (towards the side of the water surface To), ultrasonic sensor 130 is downward (towards water-bed direction).For the depth of water detection frequency, can according to the actual situation into Row setting, detection such as per second is primary, and every five seconds detection is primary or even detection in every 10 seconds is primary, is not specifically limited, dresses here Person can set when dressing the wearable device.

Eleventh embodiment of the invention is the optimal enforcement example of above-mentioned tenth embodiment, as shown in fig. 7, comprises:

The pressure difference of computing module 140, the height liquid level for being detected according to pressure sensor 120 obtains the density of water, root The density for the water being calculated according to computing module 140 obtains first distance of the wearable device apart from the water surface, can wear according to being placed in The ultrasonic measurement wearable device of the transmitting of ultrasonic sensor 130 in equipment is worn apart from water-bed second distance, and according to First distance and second distance obtain the depth of water that wearable device is presently in position, complete the measurement of the depth of water.

Further comprise in computing module 140:

First pressure value acquisition unit 141, the pressure value detected for acquiring pressure sensor are set in wearable device There are two positioned at the different location pressure sensors for being used to detect water density；

Pressure difference computing unit 142, for being examined according to collected two pressure sensors of first pressure value acquisition unit 141 Pressure difference is calculated in the pressure value measured；

First pressure difference computing unit 143, pressure difference and pressure sensing for being calculated according to pressure difference computing unit 142 Pressure difference is calculated in the active area of hydraulic pressure in device；

First water density computing unit 144, pressure difference for being calculated according to the first pressure difference computing unit 143 and The density of water is calculated in difference in height of two pressure sensors in wearable device；

In the present embodiment, when wearer correctly wears and normally starts wearable device, wearable device starts to examine The environment being presently in is surveyed, whether environment here is specially in water environment, by being pre-configured in wearable device Context detection module 110 is realized.In practical applications, which (can will test in advance for water detecting electrode Electrode is respectively arranged on the contact point of two sides of wearable device shell), during environment measuring, if it is detected that can The electrode conduction of two sides on wearable device shell then determines that wearable device is currently in water environment, and entrance is subsequent Water-depth measurement step.

Specifically, first pressure value acquisition unit 141 collects two pressure for being set to different location in wearable setting The pressure value F of sensor sensing₁And F₂Later, pressure difference computing unit 142 calculates the pressure value that two pressure sensors detect Difference obtains pressure differential deltap F=| F₁-F₂|；Later, the first pressure computing unit 149 is according to hydraulic pressure in the pressure difference and pressure sensor The pressure difference Δ P=Δ F/S between two pressure sensors is calculated in active area S；Last first water density computing unit 144 density p=Δ of water is calculated according to the difference in height Δ h of the pressure difference and two pressure sensors in wearable device P/ (g* Δ h), wherein g is acceleration of gravity.Here, wearable device is correctly worn simultaneously in use, two pressure in wearer Sensor has difference in height Δ h in the wearable device, i.e. two pressure sensors cannot be arranged in same level.

In the calculating process of above-mentioned first distance, the hydraulic pressure active area for being based on two pressure sensors is identical, It is S；In other instances, when the hydraulic pressure active area of two pressure sensors is different, and respectively S₁And S₂When, then One pressure value acquisition unit 141 collects the pressure value F of two pressure sensors induction₁And F₂Later, pressure difference computing unit 142 The pressure values of two pressure sensors, P are calculated separately out immediately₁=F₁/S₁, P₂=F₂/S₂；First pressure computing unit later 149 are calculated pressure difference Δ P=again | P₁-P₂|；Last first water density computing unit 144 is pressed according to the pressure difference and two Density p=Δ P/ (g* Δ h), wherein g is gravity of water is calculated in difference in height Δ h of the force snesor in wearable device Acceleration.

After obtaining the density of water, computing module 140 further by be equally placed in wearable device for measure away from The pressure sensor of water clearance measures first distance H₁, then by ultrasonic sensor 130 measure wearable device away from From water-bed second distance H₂.In this course, control ultrasonic sensor 130 transmitting (towards water-bed) on gravity direction Ultrasonic signal simultaneously starts timing t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor 130), when Ultrasonic sensor 130 stops timing t when receiving the ultrasonic signal returned via underwater reflection₂(via ultrasonic sensor Ultrasonic receiver in 130 receives reflected ultrasonic signal).Existed with this computing module 140 by ultrasonic signal The half for the time that spread speed v and ultrasonic signal in water are transmitted in water, calculates wearable device in vertical direction The water-bed second distance H of upper distance₂, i.e. H₂=v* (t₂-t₁)/2.Second distance H is calculated₂Later, that is, it has determined wearable The depth of water H for being presently in position of equipment_c, H_c=H₁+H₂, the detection of the depth of water is completed, and when by the value and its corresponding detection Between stored, checked convenient for subsequent.

Twelveth embodiment of the invention is the optimal enforcement example of above-mentioned tenth embodiment, as shown in Figure 8, comprising:

The pressure difference of computing module 140, the height liquid level for being detected according to pressure sensor 120 obtains the density of water, root The density for the water being calculated according to Density Calculation Module 140 obtains first distance of the wearable device apart from the water surface, according to being placed in The water-bed second distance of the ultrasonic measurement wearable device distance that ultrasonic sensor 130 in wearable device emits, and The depth of water that wearable device is presently in position is obtained according to first distance and second distance, completes the measurement of the depth of water.

In computing module 140, further comprise:

Pressure difference acquisition unit 145, the pressure difference detected for acquiring pressure sensor, pressure sensor are double flange pressures Sensor；

Second pressure difference computing unit 146, for according to the collected pressure difference of pressure difference acquisition unit 145 and pressure sensor Pressure difference is calculated in the active area of middle hydraulic pressure；

Second water density computing unit 147, pressure difference for being calculated according to the second pressure difference computing unit 146 and The density of water is calculated in the difference in height that both ends are measured in pressure sensor.

Specifically, (measurement pressure passes double-flange pressure sensor 145 capture setting of pressure difference acquisition unit in wearable setting The transmitter of the difference of sensor pressure at two ends has 2 pressure interfaces, respectively positive pressure side and negative pressure end, and under normal circumstances, positive pressure The pressure at end should be greater than the pressure at negative pressure end) induction pressure differential deltap F；Later, the second pressure difference computing unit 146 is according to the pressure difference With the active area S of hydraulic pressure in double-flange pressure sensor, pressure difference Δ P=Δ F/S is obtained；The second last water density calculates single Member 147 is calculated according to the difference in height Δ h for measuring both ends (above-mentioned positive pressure side and negative pressure end) in the pressure difference and pressure sensor To density p=Δ P/ (g* Δ h), wherein g is acceleration of gravity of water.

Thriteenth embodiment of the invention is the optimal enforcement example of above-mentioned tenth embodiment, as shown in Figure 9, comprising:

In computing module 140, further comprise:

Second pressure value acquisition unit 148, it is preset for measuring the pressure sensor of first distance for acquiring The pressure value of detection；

Pressure computing unit 149, pressure value and the pressure sensing for being acquired according to second pressure value acquisition unit 148 The active area of hydraulic pressure obtains the pressure of the pressure sensor position in device；

Third pressure difference computing unit 151, the pressure sensor position that pressure computing unit 149 is calculated Pressure subtracts atmospheric pressure and obtains difference；

First distance computing unit 152, difference and water for being calculated according to third pressure difference computing unit 151 First distance of the wearable device apart from the water surface is calculated in density.

According to the pressure difference of the height liquid level for the pressure sensor detection for detecting water density being placed in wearable device It is calculated after the density of water, second pressure value acquisition unit 148 receives preset for measuring the pressure of first distance The pressure value F of force snesor detection₃, pressure computing unit 149 is according to pressure value F₃And in the pressure sensor hydraulic pressure effect Area S' obtains the pressure P of the pressure sensor position₃=F₃/S'.Since the pressure of pressure sensor position is big The strong P of air pressure₀The sum of with the hydraulic pressure of present position depth, therefore third pressure difference computing unit 151 is by pressure sensor institute later Pressure in position subtracts atmospheric pressure and obtains difference DELTA P'=P₃-P₀, first distance computing unit 152 removes the difference with this Gravity accelerates and obtains first distance H of the wearable device apart from the water surface with the density of water₁=Δ P'/(ρ * g).

Measurement obtains first distance H₁Later, computing module 140 is further measured by ultrasonic sensor 130 wearable The water-bed second distance H of equipment distance₂.Specifically, (towards water-bed), transmitting is super on gravity direction for control ultrasonic sensor 130 Acoustic signals simultaneously start timing t₁(emitting ultrasonic signal via the ultrasonic transmitter in ultrasonic sensor 130), when super Sonic sensor 130 stops timing t when receiving the ultrasonic signal returned via underwater reflection₂(via ultrasonic sensor 130 In ultrasonic receiver receive reflected ultrasonic signal).Pass through the spread speed v of ultrasonic signal in water with this And the half of time that ultrasonic signal transmits in water, calculate wearable device in the vertical direction distance it is water-bed second Distance H₂, i.e. H₂=v* (t₂-t₁)/2.Measurement obtains second distance H₂Later, that is, wearable device has been determined is presently in position The depth of water H set_c, H_c=H₁+H₂, complete the detection of the depth of water.

The 14th kind of embodiment is obtained (in this embodiment, for measuring the in conjunction with the present embodiment and the 11st embodiment The pressure sensor of one distance can be one in two pressure sensors for detecting water density, may not be two One in pressure sensor for detecting water density, is set according to the actual situation), it is real in conjunction with this implementation and the 15th It applies example and obtains the 6th kind of embodiment, do not repeat them here.

Sixteenth embodiment of the invention is the optimal enforcement example of above-mentioned tenth embodiment, as shown in Figure 10, comprising:

The pressure difference of computing module 140, the height liquid level for being detected according to pressure sensor 120 obtains the density of water, root The density for the water being calculated according to Density Calculation Module 140 obtains first distance of the wearable device apart from the water surface, according to being placed in The water-bed second distance of the ultrasonic measurement wearable device distance that ultrasonic sensor 130 in wearable device emits, and The depth of water that wearable device is presently in position is obtained according to first distance and second distance, completes the measurement of the depth of water；

Comparison module 150, the depth of water for computing module 140 to be calculated are compared with default depth of water threshold value；

Warning module 160, when comparison module 150 judges that the depth of water reaches depth of water threshold value, the early warning grade reached according to the depth of water Corresponding warning information is not issued, reminds wearer；Default depth of water threshold value is arranged according to the height of wearer.

In the present embodiment, when wearer correctly wears and normally starts wearable device, context detection module 110 is examined Measure after wearable device is currently in water environment, computing module 140 according to be placed in wearable device for detecting The pressure difference of the height liquid level of the pressure sensor detection of water density obtains the density of water, later further by being equally placed in and can wear It wears the pressure sensor for being used to measure apart from water surface distance in equipment and measures first distance H₁.First distance H is calculated₁Later, The water-bed second distance H of wearable device distance is further measured by ultrasonic sensor 130₂, water is calculated with this Depth.

It is calculated after the depth of water, which is compared by comparison module 150 with default depth of water threshold value, works as the depth of water When reaching depth of water threshold value, warning module 160 issues corresponding warning information.Since everyone height is variant, especially at People and child height differ greatly, and are so that depth of water threshold value is arranged according to the height of wearer and could really realize the purpose of early warning. It (is configured by the configuration module in wearable device) when depth of water threshold value is set, height can be reached according to the depth of water Percentage set different warning levels, e.g., when the depth of water reaches the 30% of height, be set as level-one early warning, indicate wearer Wet water；When the depth of water reaches the 50% of height, it is set as second level early warning, instruction wearer initially enters deepwater regions；The depth of water Reach the 70% of height, be set as three-level early warning, instruction wearer comes into deep water position；The depth of water reaches the 100% of height Even superelevation height, is set as level Four early warning, and instruction wearer may have already appeared drowned situation.Also it is referred to height, Different warning levels is set according to the depth of water, e.g., as wearer height 180cm (centimetre), when the depth of water reaches 50cm, is set as one Grade early warning indicates wearer's wet water；When the depth of water reaches 90cm, it is set as second level early warning, instruction wearer initially enters depth Water area；When the depth of water reaches 130cm, it is set as three-level early warning, instruction wearer comes into deep water position；When the depth of water reaches 180cm is even more than 180cm, instruction wearer may have already appeared drowned situation.

Warning information corresponding for each warning level, is set according to different warning levels, e.g., works as warning information For by the position output of vibration signal (warning module 160 is shock module) close to wearer's skin, then according to different pre- The different vibration frequency of alert grade setting prompts wearer, and warning level is higher, and vibration frequency is higher, with this, dresses Person can perceive current situation of paddling in time.

In this example, wearable device includes communication module, has drowned monitoring function, when receiving wearer can Inputted in wearable device for drowned monitoring function open command or establish nothing with wearable device in advance receiving What any one terminal device at least one terminal device (monitoring device) of line connection was sent is directed to drowned monitoring function Open command when, wearable device opens its drowned monitoring function according to the open command received.

When the current depth of water is greater than depth of water predetermined depth threshold value, judgment module further judges the wearer of wearable device Locating water environment exist it is potential dangerous, by communication module at least one pre-set early warning platform (monitor supervision platform, Such as 110 alarm platforms, 120 emergency platforms) corresponding pre-warning signal is sent, triggering early warning platform makes a sound to monitoring personnel Early warning, when monitoring personnel determines that the wearer of wearable device is safe condition, the manually controllable early warning platform of monitoring personnel Stopping makes a sound early warning；It can also be to terminal device (such as mobile phone, PC for establishing wireless connection with wearable device in advance End) etc. send pre-warning signal, terminal device reminds monitoring personnel after receiving pre-warning signal in a manner of sound-light alarm.For pre- The transmission form of alert information, can realize in a manner of short message mode, instant communication message or in the way of call request, wherein When sending pre-warning signal in a manner of call request, after being successfully established call connection, wearable device plays emergency automatically Voice is as emergency call voice.It can also include locating module in wearable device, when needing to early warning platform/terminal device When sending warning information, while current location information being sent, convenient for rescue.

The 17th kind of embodiment is obtained in conjunction with the present embodiment and the 11st embodiment, in conjunction with this implementation and the 12nd embodiment The 18th kind of embodiment is obtained, is not repeated them here.

Above-mentioned tenth embodiment is improved to the 18th embodiment, wearable device is other than detecting the depth of water, also It can detecte the time into water, specifically, when detecting that wearable device is in water environment, pressure sensor starts to detect pressure Value, the timer record time add up timing until pressure sensing as reference time point, and based on the reference time point When device can't detect water pressure, stops timing, obtain into water duration and stored.It before this, can also be according to detecting Enter water duration setting warning information, avoid wearer's overlong time or because overlong time in water damages wearable set in water It is standby.When warning information is arranged, it can be combined with the depth of water and enter water duration and set according to the actual situation together.In addition, also Water temperature can be detected by water temperature detection sensor according to predeterminated frequency, be incorporated into water time setting warning information, avoid dressing Person in the lower environment of water temperature overlong time influence body or because in the lower environment of water temperature overlong time damage it is wearable Equipment.

It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred Embodiment, it is noted that for those skilled in the art, without departing from the principle of the present invention, Several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.

Claims

1. a kind of water-depth measurement method, which is characterized in that be applied to wearable device, the water-depth measurement method includes:

The environment being presently in is detected, if judgement is currently in water environment, is passed according to the pressure being placed in wearable device The pressure difference of the height liquid level of sensor detection obtains the density of water；

The depth of water that wearable device is presently in position is obtained according to the first distance and second distance, completes the survey of the depth of water Amount.

2. water-depth measurement method as described in claim 1, which is characterized in that

The density of water is obtained according to the pressure difference of the height liquid level for the pressure sensor detection being placed in wearable device, is further wrapped It includes:

The pressure value that pressure sensor detects is acquired, two that are located at different location are equipped in the wearable device for examining Survey the pressure sensor of water density；

Or, the density of water is obtained according to the pressure difference of the height liquid level for the pressure sensor detection being placed in wearable device, into one Step includes:

3. water-depth measurement method as claimed in claim 1 or 2, which is characterized in that obtain wearable device according to the density of water First distance apart from the water surface further comprises:

The pressure of the pressure sensor position is obtained according to the active area of hydraulic pressure in the pressure value and the pressure sensor By force；

4. water-depth measurement method as claimed in claim 1 or 2, which is characterized in that according to the first distance and second distance The depth of water that wearable device is presently in position is obtained, after the measurement for completing the depth of water, further includes:

The depth of water of measurement is compared with default depth of water threshold value, if the depth of water of measurement reaches depth of water threshold value, is reached according to the depth of water The warning level arrived issues corresponding warning information, reminds wearer；The default depth of water threshold value is set according to the height of wearer It sets.

5. water-depth measurement method as claimed in claim 4, which is characterized in that issue phase according to the warning level that the depth of water reaches The warning information answered further comprises:

By corresponding early warning acoustic information informing wearer by way of osteoacusis and/or being believed early warning by way of vibration Breath informs wearer.

6. a kind of water-depth measurement device, which is characterized in that be applied to wearable device, the water-depth measurement device includes:

Context detection module, for detecting the environment being presently in；

Pressure sensor is placed in wearable device, and when environment monitoring module judgement is currently in water environment, the pressure is passed The pressure difference of sensor detection height liquid level；

The pressure difference of computing module, the height liquid level for being detected according to pressure sensor obtains the density of water, according to computing module The density for the water being calculated obtains first distance of the wearable device apart from the water surface, according to the ultrasound being placed in wearable device The water-bed second distance of the ultrasonic measurement wearable device distance of wave sensor transmitting, and according to the first distance and second Distance obtains the depth of water that wearable device is presently in position, completes the measurement of the depth of water.

7. water-depth measurement device as claimed in claim 6, which is characterized in that

In computing module, further comprise:

First pressure value acquisition unit, the pressure value detected for acquiring pressure sensor are equipped in the wearable device Two positioned at different location are used to detect the pressure sensor of water density；

Pressure difference computing unit, for what is detected according to collected two pressure sensors of the first pressure value acquisition unit Pressure difference is calculated in pressure value；

First pressure difference computing unit, water in the pressure difference and pressure sensor for being calculated according to the pressure difference computing unit Pressure difference is calculated in the active area of pressure；

First water density computing unit, the pressure difference and two for being calculated according to the first pressure difference computing unit The density of water is calculated in difference in height of a pressure sensor in wearable device；

Or, further comprising in computing module:

Pressure difference acquisition unit, the pressure difference detected for acquiring pressure sensor, the pressure sensor are that double flange pressures pass Sensor；

Second pressure difference computing unit, for according to hydraulic pressure in the collected pressure difference of the pressure difference acquisition unit and pressure sensor Active area pressure difference is calculated；

Second water density computing unit, pressure difference and pressure for being calculated according to the second pressure difference computing unit pass The density of water is calculated in the difference in height that both ends are measured in sensor.

8. water-depth measurement device as claimed in claims 6 or 7, which is characterized in that

In the computing module, further comprise:

Second pressure value acquisition unit, for acquiring the pressure of the preset pressure sensor detection for measuring first distance Force value；

Pressure computing unit, water in the pressure value and the pressure sensor for being acquired according to the second pressure value acquisition unit The active area of pressure obtains the pressure of the pressure sensor position；

Third pressure difference computing unit subtracts the pressure for the pressure sensor position that the pressure computing unit is calculated Atmospheric pressure is gone to obtain difference；

The density of first distance computing unit, difference and water for being calculated according to third pressure difference computing unit calculates First distance to wearable device apart from the water surface.

9. water-depth measurement device as claimed in claims 6 or 7, which is characterized in that in the water-depth measurement device further include:

Warning module, when comparison module judges that the depth of water reaches depth of water threshold value, the warning level sending reached according to the depth of water is corresponding Warning information, remind wearer；The default depth of water threshold value is arranged according to the height of wearer.

10. water-depth measurement device as claimed in claim 9, which is characterized in that in the warning module, by corresponding early warning Acoustic information is informing wearer and/or warning information being informed wearer by way of vibration by way of osteoacusis.