CN110477675A - Prevent the monitor supervision platform that baby falls - Google Patents
Prevent the monitor supervision platform that baby falls Download PDFInfo
- Publication number
- CN110477675A CN110477675A CN201910346726.3A CN201910346726A CN110477675A CN 110477675 A CN110477675 A CN 110477675A CN 201910346726 A CN201910346726 A CN 201910346726A CN 110477675 A CN110477675 A CN 110477675A
- Authority
- CN
- China
- Prior art keywords
- equipment
- image
- baby
- pixel
- infanette
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D15/00—Accessories for children's furniture, e.g. safety belts
- A47D15/005—Restraining devices, e.g. safety belts, contoured cushions or side bumpers
- A47D15/008—Restraining devices, e.g. safety belts, contoured cushions or side bumpers in beds, play-pens or cradles
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D9/00—Cradles ; Bassinets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The present invention relates to a kind of monitor supervision platforms for preventing baby from falling, comprising: guardrail lift apparatus, for when receiving baby's offset signal, driving the guardrail of the infanette surrounding to carry out raising movement；The guardrail lift apparatus is also used to receiving baby's normal signal, reduces the guardrail of the infanette surrounding to carry out home operation；The guardrail lift apparatus includes permanent magnetic brushless, and the guardrail of the infanette surrounding is fabricated for aluminum alloy materials；Signal resolution equipment carries out image data acquiring bed body acquisition image obtained to infanette for receiving.The monitor supervision platform for preventing baby from falling of the invention is safe and effective, is widely used.Since when detecting that baby's target in infanette deviates infanette center, the automatic guardrail for driving infanette carries out raising processing, to reduce the probability that baby falls.
Description
Technical field
The present invention relates to Baby Care field more particularly to a kind of monitor supervision platforms for preventing baby from falling.
Background technique
Infanette is to show infant's bed used.Present infanette style is varied, and function and price are also phase
Difference is also very big, it is noted that safety and the practical principle combined when selection.Infanette in use there is also some security risks,
Parent should attach the importance, and exclude hidden danger in time.Whether infanette paint meets safety standard, is critical to see whether contain heavy metal
With the harmful components such as formaldehyde.
Infanette can be divided into: solid wood infanette, bamboo infanette, rattan infanette.
Solid wood infanette is domestic at present, and there are two types of pines to do raw material, and New Zealand pine and pinus sylvestris var. mongolica, New Zealand's pine material are softer
Easily scrape, and pinus sylvestris var. mongolica is harder, finish is less better.
Novel is with bamboo infanette, and advantage is exactly: bamboo wood is harder more closely knit than timber, and resistance to compression bending strength is more
It is high；Line is clear, plate face is beautiful, natural in color, bamboo perfume (or spice) are pleasant, texture elegance style；Bamboo wood not dust accumulation, do not condense, be easy to clean, keep away
Disturbing of damaging by worms is removed in the breeding for having exempted from mite class bacterium from；Ambient humidity and moisture-resistant can be automatically adjusted, thermal coefficient is low, and the tool winter warms up the summer
Cool characteristic；Bamboo wood has the function of absorption ultraviolet light, and eyes have comfort, equal eyes capable of preventing myopia when making one daily life indoors
The occurrence and development of disease；Sound-adsorbing sound-insulating hung removes bass, pressure reverberation, effectively gets rid of hum, goes back your quiet mental state.Its disadvantage is exactly bamboo
Cool property it is heavier, so the infanette bed board that does of bamboo had better use batten or plank, other parts are preferable with bamboo.
The current domestic production of rattan infanette it is seldom, this cost is very high, especially wild rattan.
Currently, in infanette when placing baby, due to needing to handle some family's miscellaneous affairs, between guardian cannot keep not
Disconnected monitoring, and in the case where lacking professional's monitoring, baby is in dangerous boundary, and most important situation is shown as
Lifted of baby degree of rolling across climbs out of from lower guard rail position, falls except infanette, may cause life danger when serious.
Summary of the invention
The present invention at least has following three important inventive points:
(1) when detecting that baby's target in infanette deviates infanette center, the automatic shield for driving infanette
Column carries out raising processing, to reduce the probability that baby falls；
(2) introduce includes that catastrophe point identifies that the sub- equipment of sub- equipment, quantity statistics and signal distribute the customization structure of sub- equipment
Signal resolution equipment, for determining the complexity of image based on the quantity of the pixel of pixel value mutation in image；
(3) on the basis of image restoration, the different channels under YUV channel space are executed with different targetedly figures
As processing, subsequent superposition processing and Morphological scale-space are executed again later, to reduce the operand of image procossing.
According to an aspect of the present invention, a kind of monitor supervision platform for preventing baby from falling is provided, the platform includes: guardrail
Lift apparatus, for when receiving baby's offset signal, driving the guardrail of the infanette surrounding to carry out raising movement.
More specifically, in the monitor supervision platform for preventing baby from falling: the guardrail lift apparatus is also used to receiving
To baby's normal signal, the guardrail of the infanette surrounding is reduced to carry out home operation.
More specifically, in the monitor supervision platform for preventing baby from falling: the guardrail lift apparatus includes brushless, permanently
The guardrail of motor, the infanette surrounding is fabricated for aluminum alloy materials.
More specifically, in the monitor supervision platform for preventing baby from falling, further includes: signal resolution equipment, for receiving
Image data acquiring bed body obtained is carried out to infanette and acquires image, based on pixel value mutation in bed body acquisition image
The quantity of pixel determine the complexity of bed body acquisition image, and when the complexity transfinites, issue the first triggering
Signal is also used to when the complexity does not transfinite, issues the second trigger signal；The signal resolution equipment includes that catastrophe point is known
The sub- equipment of small pin for the case equipment, quantity statistics and signal distribute sub- equipment, and the catastrophe point identifies sub- equipment and quantity statistics
Equipment connection, the sub- equipment of quantity statistics are distributed sub- equipment with the signal and are connect；The catastrophe point identifies that sub- equipment is used for
Following processing is executed for each of bed body acquisition image pixel: when the pixel value of the pixel deviates its neighbour
When the arithmetic mean of instantaneous value of the pixel value of each pixel in domain reaches default value, pixel in the bed body acquisition image is determined that it is
The pixel of value mutation；The catastrophe point identifies that sub- equipment is used to hold for each of bed body acquisition image pixel
The following processing of row: when the arithmetic mean of instantaneous value that the pixel value of the pixel deviates the pixel value of each pixel of its neighborhood is not up to
When default value, determine that it is not belonging to the pixel of pixel value mutation in the bed body acquisition image；Quantity statistics is set
It is ready for use on the quantity for counting the pixel of pixel value mutation in the bed body acquisition image, the signal distributes sub- equipment and is used for base
The quantity of the pixel of pixel value mutation determines the complexity of bed body acquisition image in bed body acquisition image, and
When the complexity transfinites, the first trigger signal is issued, when the complexity does not transfinite, issues the second trigger signal.
The monitor supervision platform for preventing baby from falling of the invention is safe and effective, is widely used.Due in detecting infanette
Baby's target when deviateing infanette center, the automatic guardrail for driving infanette carries out raising processing, to reduce baby
The probability that youngster falls.
Specific embodiment
The embodiment of the monitor supervision platform for preventing baby from falling of the invention will be described in detail below.
In order to overcome above-mentioned deficiency, the present invention has built a kind of monitor supervision platform for preventing baby from falling, can effectively solve the problem that
Corresponding technical problem.
The monitor supervision platform for preventing baby from falling shown according to an embodiment of the present invention includes:
Guardrail lift apparatus, for when receiving baby's offset signal, drive the guardrail of the infanette surrounding with into
Row raising movement.
Then, continue that the specific structure of the monitor supervision platform for preventing baby from falling of the invention is further detailed.
In the monitor supervision platform for preventing baby from falling:
The guardrail lift apparatus is also used to receiving baby's normal signal, reduce the guardrail of the infanette surrounding with
Carry out home operation.
In the monitor supervision platform for preventing baby from falling:
The guardrail lift apparatus includes permanent magnetic brushless, and the guardrail of the infanette surrounding is aluminum alloy materials manufacture
It forms.
In the monitor supervision platform for preventing baby from falling, further includes:
Signal resolution equipment carries out image data acquiring bed body acquisition image obtained, base to infanette for receiving
The quantity of the pixel of pixel value mutation determines the complexity of bed body acquisition image in bed body acquisition image, and
When the complexity transfinites, the first trigger signal is issued, is also used to when the complexity does not transfinite, issues the second triggering letter
Number；
The signal resolution equipment includes that catastrophe point identifies that sub- equipment, the sub- equipment of quantity statistics and signal distribute sub- equipment,
The catastrophe point identifies that sub- equipment is connect with the sub- equipment of the quantity statistics, and the sub- equipment of quantity statistics and the signal are distributed
Sub- equipment connection；
It is following that the catastrophe point identifies that sub- equipment is used to execute for each of bed body acquisition image pixel
Processing: when the arithmetic mean of instantaneous value that the pixel value of the pixel deviates the pixel value of each pixel of its neighborhood reaches default value
When, determine that it is the pixel of pixel value mutation in the bed body acquisition image；
It is following that the catastrophe point identifies that sub- equipment is used to execute for each of bed body acquisition image pixel
Processing: when the arithmetic mean of instantaneous value that the pixel value of the pixel deviates the pixel value of each pixel of its neighborhood is not up to present count
When value, determine that it is not belonging to the pixel of pixel value mutation in the bed body acquisition image；
The sub- equipment of quantity statistics is used to count the quantity of the pixel of pixel value mutation in the bed body acquisition image,
The signal distributes sub- equipment for based on described in the quantity determination of the pixel of pixel value mutation in bed body acquisition image
Bed body acquires the complexity of image, and when the complexity transfinites, and issues the first trigger signal, does not transfinite in the complexity
When, issue the second trigger signal；
Image restoration equipment executes image restoration to bed body acquisition image for receiving the bed body acquisition image
Processing, to obtain corresponding image restoration image；
Described image resetting device is also connect with the signal resolution equipment, for the quilt when receiving the first trigger signal
Restore electric power input, electric power input is cut off when receiving the second trigger signal；
First enhancing equipment, connect, for receiving described image restored image, to the figure with described image resetting device
The saturation degree channel subgraph execution edge enhancing formed as each saturation degree channel of pixel each in restored image is handled,
To obtain the first enhancing image；
Second enhancing equipment, connect, for receiving described image restored image, to the figure with described image resetting device
As the tone channel subgraph execution Edge contrast processing that each tone channel of pixel each in restored image forms, to obtain
Obtain the second enhancing image；
Third enhances equipment, connect with described image resetting device, for receiving described image restored image, to the figure
The luminance channel subgraph execution contrast promotion formed as each luminance channel of pixel each in restored image is handled, with
Obtaining third enhances image；
Morphological scale-space equipment enhances with the first enhancing equipment, the second enhancing equipment and the third respectively
Equipment, for holding the image after the first enhancing image, the second enhancing image and third enhancing image superposition
Row Morphological scale-space processing, to obtain corresponding Morphological scale-space image；
Centroid distance-measuring equipment is connect, for measuring respectively with the guardrail lift apparatus and the Morphological scale-space equipment
In the Morphological scale-space image centroid of infanette pattern to the pixel between the centroid of baby's pattern quantity, and in institute
When stating quantity transfinites, baby's offset signal is issued, otherwise, issues baby's normal signal；
Wherein, in the centroid distance-measuring equipment, based on the appearance profile of infanette from the Morphological scale-space image
The corresponding infanette pattern of infanette target is picked out, the infanette pattern only includes infanette target；
Wherein, it in the centroid distance-measuring equipment, is distinguished from the Morphological scale-space image based on the appearance profile of baby
Know the corresponding baby's pattern of baby's target out, baby's pattern only includes baby's target.
In the monitor supervision platform for preventing baby from falling:
The Morphological scale-space equipment includes the sub- equipment of superposition processing and the sub- equipment of dilation erosion, and superposition processing is set
It is standby to be connected with the sub- equipment of the dilation erosion.
In the monitor supervision platform for preventing baby from falling:
The sub- equipment of superposition processing is used to increase the first enhancing image, the second enhancing image and the third
Strong image superposition；
Wherein, the sub- equipment of the dilation erosion be used for will the first enhancing image, described second enhance image and described
Image after third enhancing image superposition executes the processing for first expanding post-etching.
In the monitor supervision platform for preventing baby from falling, further includes:
The surface of centroid distance-measuring equipment is arranged in parameter capture device, for detecting the temperature on centroid distance-measuring equipment surface,
To be exported as equipment surface temperature；
Data adjusting device judges that equipment is connect with FLASH storage chip, Morphological scale-space equipment and signal respectively, institute
Morphological scale-space equipment is stated to be arranged near the centroid distance-measuring equipment and connect with the centroid distance-measuring equipment.
In the monitor supervision platform for preventing baby from falling, further includes:
FLASH storage chip is connect with the data adjusting device, for saving surface temperature and receiving the complexity of data
The mapping relations of degree；
Signal judges equipment, connect with the parameter capture device, for receiving the equipment surface temperature, and is receiving
When the equipment surface temperature arrived is more than or equal to preset temperature threshold, temperature exceeding standard instruction is issued, is also used in the equipment surface
When temperature is less than the preset temperature threshold, issues temperature and close mark instruction.
In the monitor supervision platform for preventing baby from falling:
The data adjusting device is used for when receiving temperature exceeding standard instruction, based on the equipment surface temperature
Numerical value switches the complexity of the reception data of Morphological scale-space equipment, and switches centroid based on the numerical value of the equipment surface temperature
The complexity of the reception data of distance-measuring equipment；
Wherein, the data adjusting device is also used to maintain Morphological scale-space when receiving the temperature conjunction mark instruction
The complexity of the reception data of equipment, and maintain the complexity of the reception data of centroid distance-measuring equipment.
In the monitor supervision platform for preventing baby from falling:
In the data adjusting device, the numerical value switching Morphological scale-space equipment based on the equipment surface temperature is connect
The complexity of receipts data includes: the complexity and the equipment surface temperature of the reception data of the Morphological scale-space equipment after switching
Numerical value be inversely proportional；
Wherein, in the data adjusting device, the numerical value switching Morphological scale-space based on the equipment surface temperature is set
The complexity of standby reception data includes: the complexity and the equipment surface of the reception data of the centroid distance-measuring equipment after switching
The numerical value of temperature is inversely proportional.
In addition, FLASH storage chip is nonvolatile storage, the memory cell block of referred to as block can be carried out it is erasable and
It reprograms.The write operation of any FLASH device can only carry out in unit that is empty or having wiped, so in most cases,
Erasing must be first carried out before carrying out write operation.It is foolproof that NAND device, which executes erasing operation, and NOR is then required
Position all in object block is all first written as 0 before being wiped.
It when due to erasing NOR device is carried out with the block of 64~128KB, executes the time of write/erase operation
For 5s, in contrast, erasing NAND device is carried out with the block of 8~32KB, is executed identical operation and is at most only needed 4ms.
The difference of block size has further widened the performance gap between NOR and NADN when executing erasing, and statistics shows right
In given a set of write operation (when especially update small documents), more erasing operations must be in the unit based on NOR
It carries out.
It is understood that although the present invention has been disclosed in the preferred embodiments as above, above-described embodiment not to
Limit the present invention.For any person skilled in the art, without departing from the scope of the technical proposal of the invention,
Many possible changes and modifications all are made to technical solution of the present invention using the technology contents of the disclosure above, or are revised as
With the equivalent embodiment of variation.Therefore, anything that does not depart from the technical scheme of the invention are right according to the technical essence of the invention
Any simple modifications, equivalents, and modifications made for any of the above embodiments still fall within the range of technical solution of the present invention protection
It is interior.
Claims (10)
1. a kind of monitor supervision platform for preventing baby from falling characterized by comprising
Guardrail lift apparatus, for when receiving baby's offset signal, driving the guardrail of the infanette surrounding to be risen
Height movement.
2. preventing the monitor supervision platform that baby falls as described in claim 1, it is characterised in that:
The guardrail lift apparatus is also used to receiving baby's normal signal, reduces the guardrail of the infanette surrounding to carry out
Home operation.
3. preventing the monitor supervision platform that baby falls as claimed in claim 2, it is characterised in that:
The guardrail lift apparatus includes permanent magnetic brushless, the guardrail of the infanette surrounding be aluminum alloy materials manufacture and
At.
4. preventing the monitor supervision platform that baby falls as claimed in claim 3, which is characterized in that the platform further include:
Signal resolution equipment carries out image data acquiring bed body acquisition image obtained to infanette for receiving, is based on institute
The quantity for stating the pixel of pixel value mutation in bed body acquisition image determines the complexity of the bed body acquisition image, and described
When complexity transfinites, the first trigger signal is issued, is also used to when the complexity does not transfinite, issues the second trigger signal；
The signal resolution equipment includes that catastrophe point identifies that sub- equipment, the sub- equipment of quantity statistics and signal distribute sub- equipment, described
Catastrophe point identifies that sub- equipment is connect with the sub- equipment of the quantity statistics, and the sub- equipment of quantity statistics is set with signal distribution
Standby connection；
The catastrophe point identifies that sub- equipment is used to execute following processing for each of bed body acquisition image pixel:
When the arithmetic mean of instantaneous value that the pixel value of the pixel deviates the pixel value of each pixel of its neighborhood reaches default value, really
Its fixed pixel that pixel value mutation in image is acquired for the bed body；
The catastrophe point identifies that sub- equipment is used to execute following processing for each of bed body acquisition image pixel:
When the arithmetic mean of instantaneous value that the pixel value of the pixel deviates the pixel value of each pixel of its neighborhood is not up to default value,
Determine that it is not belonging to the pixel of pixel value mutation in the bed body acquisition image；
The sub- equipment of quantity statistics is used to count the quantity of the pixel of pixel value mutation in the bed body acquisition image, described
Signal distributes sub- equipment for determining the bed body based on the quantity of the pixel of pixel value mutation in bed body acquisition image
The complexity of image is acquired, and when the complexity transfinites, issues the first trigger signal, when the complexity does not transfinite,
Issue the second trigger signal；
Image restoration equipment executes image restoration processing to bed body acquisition image for receiving the bed body acquisition image,
To obtain corresponding image restoration image；
Described image resetting device is also connect with the signal resolution equipment, for being resumed when receiving the first trigger signal
Electric power input is cut off electric power input when receiving the second trigger signal；
First enhancing equipment, connect with described image resetting device, multiple to described image for receiving described image restored image
The saturation degree channel subgraph of each saturation degree channel composition of each pixel executes edge enhancing processing in original image, to obtain
Obtain the first enhancing image；
Second enhancing equipment, connect with described image resetting device, multiple to described image for receiving described image restored image
The tone channel subgraph of each tone channel composition of each pixel executes Edge contrast processing in original image, to obtain the
Two enhancing images；
Third enhances equipment, connect with described image resetting device, multiple to described image for receiving described image restored image
The luminance channel subgraph of each luminance channel composition of each pixel executes contrast promotion processing in original image, to obtain
Third enhances image；
Morphological scale-space equipment enhances equipment with the first enhancing equipment, the second enhancing equipment and the third respectively,
For the image after the first enhancing image, the second enhancing image and third enhancing image superposition to be executed form
Processing processing is learned, to obtain corresponding Morphological scale-space image；
Centroid distance-measuring equipment is connect with the guardrail lift apparatus and the Morphological scale-space equipment respectively, described for measuring
In Morphological scale-space image the centroid of infanette pattern to the pixel between the centroid of baby's pattern quantity, and in the number
When amount transfinites, baby's offset signal is issued, otherwise, issues baby's normal signal；
Wherein, it in the centroid distance-measuring equipment, is recognized from the Morphological scale-space image based on the appearance profile of infanette
The corresponding infanette pattern of infanette target out, the infanette pattern only include infanette target；
Wherein, it in the centroid distance-measuring equipment, is picked out from the Morphological scale-space image based on the appearance profile of baby
The corresponding baby's pattern of baby's target, baby's pattern only include baby's target.
5. preventing the monitor supervision platform that baby falls as claimed in claim 4, it is characterised in that:
The Morphological scale-space equipment includes the sub- equipment of superposition processing and the sub- equipment of dilation erosion, the sub- equipment of superposition processing and
The sub- equipment connection of dilation erosion.
6. preventing the monitor supervision platform that baby falls as claimed in claim 5, it is characterised in that:
The sub- equipment of superposition processing is used for the first enhancing image, the second enhancing image and third enhancing figure
As superposition；
Wherein, the sub- equipment of the dilation erosion is used for the first enhancing image, the second enhancing image and the third
Image after enhancing image superposition executes the processing for first expanding post-etching.
7. preventing the monitor supervision platform that baby falls as claimed in claim 6, which is characterized in that the platform further include:
The surface of centroid distance-measuring equipment is arranged in parameter capture device, for detecting the temperature on centroid distance-measuring equipment surface, to make
For the output of equipment surface temperature；
Data adjusting device judges that equipment is connect with FLASH storage chip, Morphological scale-space equipment and signal respectively, the shape
State processing equipment is arranged near the centroid distance-measuring equipment and connect with the centroid distance-measuring equipment.
8. preventing the monitor supervision platform that baby falls as claimed in claim 7, which is characterized in that the platform further include:
FLASH storage chip is connect with the data adjusting device, for saving surface temperature and the complexity of reception data
Mapping relations；
Signal judges equipment, connect with the parameter capture device, for receiving the equipment surface temperature, and is receiving
When equipment surface temperature is more than or equal to preset temperature threshold, temperature exceeding standard instruction is issued, is also used in the equipment surface temperature
When less than the preset temperature threshold, issues temperature and close mark instruction.
9. preventing the monitor supervision platform that baby falls as claimed in claim 8, it is characterised in that:
The data adjusting device is used for when receiving temperature exceeding standard instruction, the numerical value based on the equipment surface temperature
Switch the complexity of the reception data of Morphological scale-space equipment, and centroid ranging is switched based on the numerical value of the equipment surface temperature
The complexity of the reception data of equipment；
Wherein, the data adjusting device is also used to maintain Morphological scale-space equipment when receiving the temperature conjunction mark instruction
Reception data complexity, and maintain the complexity of the reception data of centroid distance-measuring equipment.
10. preventing the monitor supervision platform that baby falls as claimed in claim 9, it is characterised in that:
In the data adjusting device, the reception number of the numerical value switching Morphological scale-space equipment based on the equipment surface temperature
According to complexity include: switching after Morphological scale-space equipment receptions data complexity and the equipment surface temperature number
Value is inversely proportional；
Wherein, in the data adjusting device, the numerical value switching Morphological scale-space equipment based on the equipment surface temperature
The complexity of reception data includes: the complexity and the equipment surface temperature of the reception data of the centroid distance-measuring equipment after switching
Numerical value be inversely proportional.
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| CN112906688A (en) * | 2019-12-04 | 2021-06-04 | 刘志方 | Information analysis platform based on visual processing |
| CN114209509A (en) * | 2021-12-30 | 2022-03-22 | 常德职业技术学院 | Timely response system suitable for mother and infant nurses |
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| CN109635771A (en) * | 2018-12-21 | 2019-04-16 | 邱礼璇 | Driver's anti-interference system |
| CN109480539A (en) * | 2019-01-02 | 2019-03-19 | 孙其军 | A kind of intelligent automatic lifting guardrail for preventing children from falling |
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| CN112906688A (en) * | 2019-12-04 | 2021-06-04 | 刘志方 | Information analysis platform based on visual processing |
| CN111387757A (en) * | 2020-05-28 | 2020-07-10 | 杭州纺瑰谛家具有限公司 | Device for preventing baby from falling off of baby cradle based on electromagnetic induction principle |
| CN114209509A (en) * | 2021-12-30 | 2022-03-22 | 常德职业技术学院 | Timely response system suitable for mother and infant nurses |
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