CN106558188A - A kind of old man falls evidence obtaining positioning and alarm device and its method of work when falling ground - Google Patents
A kind of old man falls evidence obtaining positioning and alarm device and its method of work when falling ground Download PDFInfo
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- CN106558188A CN106558188A CN201510626508.7A CN201510626508A CN106558188A CN 106558188 A CN106558188 A CN 106558188A CN 201510626508 A CN201510626508 A CN 201510626508A CN 106558188 A CN106558188 A CN 106558188A
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- module
- old man
- falls
- alarm
- microprocessor
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
- G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
- G08B21/043—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting an emergency event, e.g. a fall
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/016—Personal emergency signalling and security systems
Abstract
The invention discloses a kind of old man falls the evidence obtaining positioning and alarm device and its method of work when falling ground, the composition of device includes：Sensor assembly, microprocessor, photographing module, recording module, d GPS locating module, alarm communication module, power module.When old man falls tumble, built-in miniature pressure transducer in sensor assembly is started working due to stress, start whole device work simultaneously, sensor assembly controls photographing module by microprocessor, recording module, photographing module starts shooting, and recording module starts synchronization, obtains old man and falls evidence when falling ground.D GPS locating module and alarm communication module, alarm communication module are sent the information of d GPS locating module to 120 emergency platforms and 110 police service platforms, while information is sent on the mobile phone of old man close relative by GPRS and Internet network.Apparatus of the present invention can send the distress signal of particular location automatically, can save relief and therapeutic time, be that rescue old man's life strives for the quality time.
Description
Technical field
The present invention relates to a kind of evidence obtaining is reported to the police and positioner, be applied to take when old man is outgoing and take with oneself, fall drop to when
Positioning of can collecting evidence in time and warning, are sued and laboured in real time.
Background technology
From the beginning of Peng Yu cases, old man falls down and should help or not, not only becomes the topic of people's extensive concern, also becomes initiation people to working as
The worry whether modern social morality, intuitive knowledge come down and thinking.In fact, a common civil disputation rises to lawsuit,
And then by the extensive concern of public opinion, itself has reason therein by oneself.
But it is not enough that these problems can fall pressing the leak for taking action to take precautions against, make up presence, undoubtedly, also original event truth,
The clarification rights and wrongs, for safeguarding that social equity justice is most important.Really, take pleasure in helping people, do not hesitate to do what is right,
It is also required to wisdom.
Using modern means of science and technology, can invent a kind of device carries out real-time synchronization recording shooting when old man falls tumble ground, while
Send an SOS to Public Security Organss and medical first aid mechanism.
The content of the invention
The present invention invents a kind of device with regard to the problems referred to above under the conditions of modern science and technology, similar to mobile phone size, by old man with
A kind of device for carrying, can complete real-time synchronization recording shooting is carried out when old man falls tumble ground, while to Public Security Organss and doctor
Treat emergency authorities to send an SOS.Concrete technical scheme is as follows：
The composition of device includes：Sensor assembly 1, microprocessor 2, photographing module 3, recording module 4, d GPS locating module 5,
Alarm communication module 6, power module 7.Module connects：Sensor assembly 1 controls photographing module 3, record by microprocessor 2
Sound module 4, d GPS locating module 5 and alarm communication module 6, alarm communication module 6, by GPRS and Internet network
The information of d GPS locating module 5 is sent to 120 emergency platforms and 110 police service platforms, while information is sent to old man close relative
Mobile phone on.
Sensor assembly 1, has micro pressure sensor 8 to be connected with signal conditioning circuit 9 in its block, signal conditioning circuit 9 will
After the small-signal of micro pressure sensor 8 is amplified, microprocessor 2 is transported to.
Alarm communication module 6 is made up of sim card socket 11, GPRS chips 10 and antenna 12, sim card socket 11 and antenna
12 are connected with GPRS chips 10 respectively, and alarm module 6 is connected with microprocessor 2.
The method of work of device is as follows：
1) when old man falls tumble, the built-in miniature pressure transducer in sensor assembly is started working due to stress, while starting whole
Device works；
2) photographing module starts shooting, and recording module starts synchronization, obtains old man and falls evidence when falling ground；
3) d GPS locating module work, particular location when determining that old man falls tumble；
4) alarm communication module work, old man is fallen position during tumble, is sent to 120 suddenly by GPRS and Internet network
Rescue platform and 110 police service platforms；
5) in device as needed can with built-in and additions and deletions old man close relative personnel cell-phone telephone numbers, while by old man fall tumble and
The information of its position is sent to their mobile phone.
The positive effect of the present invention is as follows：
1. apparatus of the present invention small volume, lightweight, is adapted to old man and uses and be easy to carry；
2. apparatus of the present invention can carry out real-time synchronization shooting when old man falls tumble ground so that after old man falls tumble ground, Neng Gouyou
People dare to go rescue in time；
3. apparatus of the present invention can be reported to the police to 110 platforms simultaneously and send warning and distress signal with 120, enable to old man and obtain in time
Effectively relief and treatment；
4. apparatus of the present invention can send the distress signal of particular location automatically, can save relief and therapeutic time, be rescue old man's life
Life strives for the quality time；
5. apparatus of the present invention are automatically turned on when old man falls tumble ground, at ordinary times in holding state, save electricity.
Description of the drawings
The composition figure of Fig. 1 apparatus of the present invention
Fig. 2 sensor assemblies composition figure
Fig. 3 alarm communication modules composition figure
In figure：Sensor assembly 1, microprocessor 2, photographing module 3, recording module 4, d GPS locating module 5, alarm communication module
6, power module 7, micro pressure sensor 8, signal conditioning circuit 9, S GPRS chips 10, IM cards socket 11, antenna
12。
Specific embodiment
Specific implementation method is described with reference to Figure of description
1. the course of work of apparatus of the present invention
As shown in figure 1, the course of work of apparatus of the present invention is as follows：
1) when old man falls tumble, the built-in miniature pressure transducer in sensor assembly is started working due to stress, while starting whole dress
Put work；
2) photographing module starts shooting, and recording module starts synchronization；
3) d GPS locating module work, particular location when determining that old man falls tumble obtain old man and fall evidence when falling ground；
4) alarm communication module work, old man is fallen position during tumble, is sent to 120 suddenly by GPRS and Internet network
Rescue platform and 110 police service platforms；
5) in device as needed can with built-in and additions and deletions old man close relative personnel cell-phone telephone numbers, while by old man fall tumble and
The information of its position is sent to their mobile phone.
2. the selection of microprocessor
A high speed arm processor AT91RM9200 that embed 32 ARM920T cores of the microprocessor 2 from Atmel companies
As center processor, with high-performance, low-power consumption, inexpensive feature, its instruction processing speed can be up to 200MI/s (million
VAX Instructions Per Second VAX), the high-speed transfer that can meet wireless sensor gateway node requires that it is a technical grade microcontroller again, can
It is adapted to compare the requirement of bad environments, it is ensured that the stability of device work.The Linux of standard can be transplanted simultaneously on AT91RM9200
Operating system, reduces the development difficulty of device software and enhances its portability, be conducive to the secondary development of software.
3. sensor assembly
As shown in Fig. 2 sensor assembly 1, has micro pressure sensor 8 to be connected with signal conditioning circuit 9, signal in its block
After the small-signal of micro pressure sensor 8 is amplified by modulate circuit 9, microprocessor 2 is transported to.
The selection of micro pressure sensor：
Honeywell pressure transducer is that specific practice is by with piezoelectric effect carrying out the measurement of pressure using piezoresistive effect
Foil gauge connects into Hui Sideng electric bridges, and these are bonded on diaphragm with foil gauge.When the diaphragm of pressure transducer is because pressed
When power is acted on and deformed upon, foil gauge also changes therewith and while causes the change of electrostrictive strain resistance.Final circuit because electricity
The change of resistance and cause electricity to change, can be obtained by pressure using the relation between pressure and resistance, resistance and electricity
With the relation of electricity, and then tonometric purpose is reached.
The micro pressure sensor of Honeywell includes that 24PC-SMT and 26PC-SMT is serial, is ultra-small volume, low-power consumption, height
Reliability, surface sealing dress micro pressure sensor.Pressure transducer is the piezo resistive technology based on Honeywell, product one
Cause property is good, it is not necessary to which extra correction can be carried out replacing.Wherein 24PC-SMT micro pressure sensors are without temperature compensation and do not have
There is the product for carrying out demarcating, and 26PC-SMT micro pressure sensors are with temperature compensation and the product demarcated, selection
26PC-SMT micro pressure sensors.
The selection of signal condition chip：
The NSA821 Embeddeds high-performance instrument amplifier of one configurable gain (1X-128X), one 24
Sigma-Delta ADC, temperature sensor in the piece of a high accuracy (± 1 DEG C) low noise (0.01 DEG C), one group is used to deposit
Storage calibration factor can single programming nonvolatile memory (OTP), and one can to the zero migration of MEMS sensor,
Sensitivity and its temperature coefficient and the linearity carry out the DSP core of second order calibration, it is possible to support the ultra-wide work of 1.8V-5.5V
Make voltage range.Compared with similar products, the noiseproof feature of NSA821 is very outstanding, is set to 32X, conversion time in gain
When being set to 35ms, the equivalent noises to input of NSA821 are only 300nV.
In addition, source of stable pressure (LDO) output of the 1.8V provided inside NSA821 can provide stable perseverance for MEMS sensor
Pressure excitation, the current switch (PSW) for automatically controlling can cut off the electric current of MEMS sensor after data conversion terminates to save
Power consumption.The power consumption consumed during NSA821 full speed operations is less than 480uA, and stand-by power consumption is less than 100nA, is very suitable for having low
The portable product such as the application scenario of power consumption requirements, such as smart mobile phone, panel computer.
In addition, NSA821 is additionally used and is received news microelectronics in the multinomial of the aspect such as bridge type magnetic sensor driving and temperature compensation calibration
Autonomous patented technology, can be differed with the temperature of the extraordinary warm up drifts for solving pressure transducer and MEMS and ASIC
The problems such as cause, sensor is made to reach higher stability.
Used as the special ASIC of altimeter of the domestic first independent supply of material, the property indices of NSA821 reach water leading in the world comprehensively
It is flat.The altimeter product highest developed using NSA821 can reach the resolution of 0.5Pa (4cm), exceed well over the current world
2Pa (16cm) resolution of the altimeter product BMPl80 of the Bosch companies of main flow.
4. photographing module
Carry out shooting static images by built-in digital camera or short-movie shoots, CPU is integrated with processing system for video and photographic head
Drive etc., CPU and photographic head data signal have 8-10, be come fixed, when mobile phone system according to CPU models and photographic head itself
System is entered and is taken pictures or shooting state, provides a 2.8V voltages by power supply, carries out photographic head by the reset signal that CPU sends multiple
Position, data start transmission while photographic head enters working condition.
Maximum pixel English name is Maximum Pixels, and so-called maximum pixel obtained after interpolation arithmetic.Interpolation
Computing by the dsp chip that is located inside digital camera, when enlarged drawing is needed with transporting closest to method interpolation, linear interpolation etc.
Calculation method, adds the pixel increased required for after image amplifies in image.The picture quality obtained after interpolation arithmetic can not be with
The image of real photosensitive imaging is compared.The picture clarity shot with maximum pixel is less than being shot with valid pixel.
Pixel count is simultaneously not bery high, mostly between 1,300,000 one 800 ten thousand pixels.The pixel count of digital camera is bigger, captured
The resolution of still image is also bigger, and the space shared by a corresponding pictures can also increase.
Continuous shooting function English scientific name is continuous shooting, is by saving data transmission period catching photography opportunity.
Burst mode is by data to be loaded the high-speed memory (cache) inside digital camera, rather than transmits number to storage card
According to multiple pictures can be continuously shot at short notice.To change and matchmaker through opto-electronic conversion, a/d as digital camera shoots
The processes such as body record, wherein no matter change or record being required for the cost time, particularly record the cost time more.Therefore,
The continuous capturing speed of all digital cameras is not quickly.
Typically with frame as unit of account, as cinestrip, each frame represents a picture, the frame that can be caught per second to continuous shooting
Number is more, and continuous shooting function is faster.Currently, continuous capturing speed most fast in digital camera is 7 frames/second, and continuous shooting must after 3 seconds
Must could continue to shoot after several seconds.Certainly, continuous capturing speed for press photographer and sports photography lover be the finger that must be noted that
Mark, and commonness photograph occasion may not necessarily consider.Generally, the photo that continuous shooting catches, resolution and quality all can be
Reduce.Some digital cameras can be selected on continuous shooting function, shoot the less photo of resolution, and continuous capturing speed can be accelerated,
Conversely, the continuous capturing speed of the big photo of resolution relative can slow down.
By continuous snap pattern, need only give the button a slight press, you can be continuously shot, continuous action is vivo recorded.
5. recording module
It is arbitrarily to be recorded preservation by triggering REC record buttons, and after recording is finished, then PLAY play button playback is triggered,
And can realize repeating a voice storage chip of recording playback, it includes two processes of ADC and DAC, is all by chip itself
Complete, the step such as collection, analysis, compression, storage, broadcasting including speech data.
It is exactly two buttons composition that REC and PLAY pass through, it is more multi-functional that selection can be defined according to specific case,
(1) quantization of voice signal
Sample rate (f), digit (n), baud rate (T)
Sampling：Voice analog signal is changed into into digital signal.
Sample rate：The number (byte) of sampling per second.
Baud rate：The digit (bit) of sampling each second.Baud rate directly determines tonequality.Bps：bit per second
Sampling resolution refers to the digit under binary condition.Typically in case of no particular description, the sampling resolution of sound refers to
It is 8, by OOH-FFH, quiet to be set to 80H.
(2) sample rate
Nyquist sampling theorem (Nyquist Law)：To recover original signal from sampled signal without distortions, sampling frequency should
More than 2 times of signal highest frequencies.When sampling frequency is less than 2 times of frequency spectrum highest frequencies, the frequency spectrum of signal has aliasing.Sampling frequency
During more than 2 times of frequency spectrum highest frequencies, the frequency spectrum of signal is without aliasing.
The bandwidth of voice is 20～20K HZ or so, and common sound is probably in below 3KHZ.So, what general CD took
Tonequality is 44.1K and 16bit, if meeting some special sound, such as musical instrument, the feelings of tonequality also useful 48K and 24bit
Condition, but be not main flow.
Typically when we are processed for normal speech work C, sample rate is up to 16K, and just much of that, voice typically takes
8K (such as telephone sound quality), 6K or so.It is poor less than 6K effects.
During using single-chip microcomputer, sample it is higher, timer interruption speed is faster, influence whether other signals monitoring and
Detection, so will consider.
(3) voice compression technique.
As amount of voice data is huge, it is very necessary that speech data is carried out being effectively compressed, and can make us in limited ROM
The more voice contents of typing in space.There are following several ways：
Voice segment：Content intact out, is played back out by recursive portion intercepts in voice by permutation and combination.
Speech sample：The loudspeaker frequency response curve that typically we use is in intermediate-frequency section, less to use high frequency, so, in loudspeaker sound
In the case of matter acceptable, sample frequency is suitably reduced, reach compression effectiveness, this process is irreversible, it is impossible to recovered
Original appearance, is lossy compression method.
Mathematics compresses：It is primarily directed to sampling resolution to be compressed, this mode is also lossy compression method.For example, our Jing are often adopted
ADPCM compressed formats, are that speech data is compressed to 4bit from 16bit, and compression ratio is 4 times.MP3 is to data flow
It is compressed, is related to data prediction problem, its baud rate compression multiplying power is 10 times or so.
Generally, several compress modes of the above are all integrated and are used.
(4) commonly use phonetic matrix
PCM format：Pulse Code Modulation pulse code modulation, it will be quantified after speech simulation signal sampling
Speech data afterwards, is a kind of phonetic matrix of most basic most original.With its extremely similar also RAW forms and SND forms.
They are all pure phonetic matrixs.
WAV forms：Wave Audio Files are a kind of AIFCs of Microsoft's exploitation, are also wave file,
Extensively supported by windows platform and its application program.The many compression algorithms of WAV forms support, the various audio frequency digits of support,
Sample frequency and sound channel, but WAV forms are not easy to greatly very much exchange and propagate to memory space requirements.Deposit inside wav file
Each block number according to the mark for having oneself independent, by these marks can tell user actually this be what data, these data
Including sample frequency and digit, monophonic (mono) or stereo (stero) etc..
ADPCM forms：It is to utilize to past several sample values the sample value to predict current input, and makes it have adaptive
Forecast function is compared with actually detected value, and the difference to measuring carries out quantifying differential process automatically at any time, is allowed to protect all the time
Hold change synchronous with signal.It is applied to the moderate situation of voice rate of change, and acoustic playback process is brief.Its advantage is
It is more true to nature for the process of voice, more than 90% is commonly reached, field of telephone communication has been widely used in.
6. locating module
Device positioning refers to the positional information (latitude and longitude coordinates) by specific location technology come acquisition device, on electronic chart
Mark technology or the service of the position for being positioned object.Location technology has two kinds, is the positioning based on GPS.Determining based on GPS
Position mode is the position signalling of oneself to be sent to positioning backstage to realize device positioning using the d GPS locating module on device.
Architecture is then determining mobile phone location using base station to the measuring and calculating distance of the distance of device.
Integrated GPS, can very easily realize the independent navigation of vehicle in a device, and user will no longer because lost delay certainly
Oneself stroke, it is convenient and practical.More and more devices with GPS functions in turn will pushing position service (LBS) development.
Another promotes the guiding that the factor of integrated GPS functions in a device is policy, the policy of country to support the device GPS for promoting energetically
Development.
The receiving sensitivity of GPS chip is higher, searches that star speed is faster, and power consumption is lower, and using will be more convenient, user be using just
Can be more extensive.But the signal of GPS is very weak, any interference can all have influence on its reception and properties of product.Therefore GPS
The design optimization degree of product can produce strong influence to the performance of product, so as to affecting user to the accreditation of GPS products and connecing
By degree.The cost of GPS module includes the price of the correlation components and parts such as GPS module, GPS processor and map, causes GPS moulds
The cost and price of block is of a relatively high, and many users can't bear this price now.But with reduction and the skill of cost
The progress of art, many manufacturer terminals and device design companies are releasing corresponding scheme and product, device GPS chip and solution
Scheme presents soft or hard scheme battle, and power consumption and receiving sensitivity become focal point.
Device locating module, it refers to the positional information (latitude and longitude coordinates) by specific location technology come acquisition device, in electricity
Technology or the service of the position for being positioned object are marked on sub- map.
Device locating module is not necessarily device GPS location, says location technology first, and location technology has two kinds, Yi Zhongshi
Based on the positioning of GPS, a kind of is the positioning of the base station based on mobile operation network.It is using on device based on the positioning mode of GPS
D GPS locating module by the position signalling of oneself be sent to positioning backstage come realize device positioning.Architecture is then to utilize base
The measuring and calculating distance of the distance to device of standing comes determining device position.The latter does not need device to have GPS location ability, but smart
Degree depends greatly on the distribution of base station and the size of coverage.The former positioning precision is higher.In addition with being existed using Wifi
The mode of a small range positioning.
7. alarm communication module
Alarm communication module 6 is made up of sim card socket 11, GPRS chips 10 and antenna 12, sim card socket 11 and antenna
12 are connected with GPRS chips 10 respectively, and alarm module 6 is connected with microprocessor 2.
Alarm communication module 6 is connected with microprocessor and power module respectively by GPRS module.GPRS chips 10 select MC55
Model, by the built-in ICP/IP protocol stacks of MC55, makes application program be easy to access network by AT instruction controls.This scheme
Advantage be that it is not required to application program, developer performs TCP/IP the and PPP stacks of oneself, so minimizes network connection
The cost needed for application program that is new or having existed and time into one, realize the wireless dial-up GPRS connections of data.
GPRS is the abbreviation of general packet radio service technology (General Packet Radio Service), and it is GSM movement electricity
A kind of available mobile data services of words user.GPRS can say be GSM continuity.GPRS was with the past continuously in the side of channel transmission
Formula is different, is that transmitting, therefore the expense born by user is calculated with its data transmission unit with package (Packet) formula,
And non-usage its whole channel, in theory inexpensively.The transfer rate of GPRS can be promoted to 56 even 114Kbps.
GPRS is " GPRS (general packet radio service) " (English abbreviation of General Packet Radio Service), is existing
There is a kind of new packet data transmission technique opened in GSM network.Relative to original GSM with the circuit switching of dial-up access
Data mode, GPRS are packet-switch technologies, with " always online ", " switching freely ", " high-speed transfer " etc.
Advantage, its energy General Promotion mobile data communication service, services " mobile dream network " more rich, with better function, to you
Live and work bring it is more it is convenient with it is economical.
Business advantage：
Wide area is covered：GPRS saves more than 240 city at national 31 good covering, substantially can make a phone call in mobile phone
Where can pass through GPRS wireless networkings；
It is always online：As long as after activation GPRS applications, will be always maintained at online, similar to wireless private line network service.
Charging according to quantity：Although GPRS services keep always on, you there is no concern that cost issues；Because only that producing communication stream
Ability charging during amount.
High-speed transfer：GPRS can support the hardware circuit solution of 53.6Kbps at present, and theoretical peak transmission is up to more than 100 Kbps.
Business is enriched：Multimedia message, WAP palm information, financial transaction, game treasure case, colourful service application are related to people
The every field lived.
Claims (6)
1. a kind of old man falls the evidence obtaining positioning and alarm device when falling ground, and its composition includes：Sensor assembly (1), microprocessor
(2), photographing module (3), recording module (4), d GPS locating module (5), alarm communication module (6), power module (7),
It is characterized in that：Sensor assembly (1) controls photographing module (3), recording module (4), GPS by microprocessor (2)
Locating module (5) and alarm communication module (6), alarm communication module (6) is by GPRS and Internet network by GPS
The information of locating module (5) is sent to 120 emergency platforms and 110 police service platforms, while information to be sent to the handss of old man close relative
On machine.
2. it is according to claim 1 fall fall ground when evidence obtaining positioning and alarm device, it is characterised in that：Described sensor die
Block (1), has micro pressure sensor (8) to be connected with signal conditioning circuit (9) in its block, signal conditioning circuit (9) will be micro-
After the small-signal of type pressure transducer (8) is amplified, microprocessor (2) is transported to.
3. it is according to claim 2 fall fall ground when evidence obtaining positioning and alarm device, it is characterised in that：Micro pressure sensor
(8) 26PC-SMT micro pressure sensors are selected.
4. old man according to claim 1 and 2 falls evidence obtaining positioning and alarm device when falling ground, it is characterised in that：Described
Microprocessor (2) is using arm processor AT91RM9200.
5. it is according to claim 1 fall fall ground when evidence obtaining positioning and alarm device, it is characterised in that：The Alarm Communication mould
Block (6) is made up of sim card socket (11), GPRS chips (10) and antenna (12), sim card socket (11) and antenna
(12) it is connected with GPRS chips (10) respectively, alarm module (6) is connected with microprocessor (2).
6. the old man according to claim 1-5 any claim falls the evidence obtaining positioning and alarm device when falling ground, its work
Method, it is characterised in that：
1) when old man falls tumble, the built-in miniature pressure transducer in sensor assembly is started working due to stress, while starting whole
Device works；
2) photographing module starts shooting, and recording module starts synchronization, obtains old man and falls evidence when falling ground；
3) d GPS locating module work, particular location when determining that old man falls tumble obtain old man and fall evidence when falling ground；
4) alarm communication module work, old man is fallen position during tumble, is sent to 120 suddenly by GPRS and Internet network
Rescue platform and 110 police service platforms；
5) in device as needed can with built-in and additions and deletions old man close relative personnel cell-phone telephone numbers, while by old man fall tumble and
The information of its position is sent to their mobile phone.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107277418A (en) * | 2017-05-27 | 2017-10-20 | 成都明途科技有限公司 | The synchronization video recording equipment handled official business for public security |
| CN108877149A (en) * | 2018-08-27 | 2018-11-23 | 淮海工学院 | A kind of intelligence emergency treatment alarm and emergency alarm method |
| CN109303386A (en) * | 2018-11-21 | 2019-02-05 | 马天超 | A kind of intelligent and safe bracelet |
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Application publication date: 20170405 |