CN105865601A - Integrated intelligent child height and weight measuring instrument and Internet-of-things system thereof - Google Patents
Integrated intelligent child height and weight measuring instrument and Internet-of-things system thereof Download PDFInfo
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- CN105865601A CN105865601A CN201610365400.1A CN201610365400A CN105865601A CN 105865601 A CN105865601 A CN 105865601A CN 201610365400 A CN201610365400 A CN 201610365400A CN 105865601 A CN105865601 A CN 105865601A
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- height
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
- G01G19/50—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons having additional measuring devices, e.g. for height
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Signal Processing (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses an integrated intelligent child height and weight measuring instrument and an Internet-of-things system thereof. By adopting a weighing structure, a height measuring structure and a height measuring horizontal auxiliary plate, the purpose of simultaneously measuring the weight and the height is achieved; obtained result data can be transmitted to a mobile phone in a wireless mode to be managed by a mobile phone APP or uploaded to a cloud server, and monitoring on the height and weight changing conditions of a customer is achieved.
Description
Technical field
The present invention relates to a kind of height and weight measuring instrument, in particular a kind of integral and intelligent child
Height and weight measuring instrument and Internet of things system thereof.
Background technology
Electronic boby weight measurement the most on the market uses the LOAD CELLS that technology is more ripe to survey
Amount, LOAD CELLS possesses the advantages such as low cost, reliability is high, power consumption is low, but weighing and sensing
Device measurement data is disposable result, does not do data record, is more not carried out the system to data variation
Meter.Occur the most on the market and the weighing machine of mobile phone interconnection, but owing to using process complicated, and adult
BMI (body-mass index) data fluctuations is little, is the most finally only used as the electronic boby weight that a Daepori is logical
Meter.
The application of contactless instrument for measuring height is few, and main cause is in-convenience in use and accuracy of measurement
The highest, contactless instrument for measuring height mainly uses the ultrasonic measuring distance technology that certainty of measurement is higher,
Its use process is: needs the distance of measured in advance measuring instrument and ground, then measures and the tested person crown
Distance, both differences are the height of tested person；Measurement process is by the tested person crown and measuring probe
Aligned relationship and hair style impact, the fluctuation of repetitive measurement result is relatively big, thus accuracy of measurement extremely matter
Doubt.
At society, the healths such as child grows stage, trophic structure are especially closed by the heads of a family
Note, product the most on the market, the measurement of body weight and height is independent, and measurement process is separate,
Measurement data can not embody the physical developmental state of child.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
It is an object of the invention to provide a kind of integral and intelligent child height body weight measuring device and Internet of Things thereof
Net system, it is intended to solving existing measuring instrument and can not measure height and body weight simultaneously, measurement result fluctuates
Greatly, process is measured complicated, it is impossible to meet and use the problem required.
Technical scheme is as follows:
A kind of integral and intelligent child height body weight measuring device, wherein, including:
For the weighing structure weighed in；
For measuring the height measurement structure of height；
For controlling the Central Control Module that whole measuring instrument is properly functioning；
For the wireless communication module that measurement data is transmitted by wireless communication mode；
Described weighing structure, height measurement structure and wireless communication module the most all with Central Control Module
Connect.
Described integral and intelligent child height body weight measuring device, wherein, also includes for showing height
With the display module of body weight measurements, described display module is connected with Central Control Module.
Described integral and intelligent child height body weight measuring device, wherein, also includes for for whole survey
Amount instrument provide power supply power module, described power module respectively with weighing structure, height measurement structure,
Central Control Module, display module and wireless communication module connect.
Described integral and intelligent child height body weight measuring device, wherein, described weighing structure includes:
For supporting the panel of weighing of gauger；
It is arranged on the LOAD CELLS for sensing weight change weighing on panel；
For filtering weight signal filtered and amplify and amplifying circuit；
For the zeroing circuit that weight signal is adjusted；
Described LOAD CELLS is connected with filtering and amplifying circuit, filtering and amplifying circuit and zeroing circuit
Connecting, zeroing circuit is connected with Central Control Module, and LOAD CELLS is connected with Central Control Module.
Described integral and intelligent child height body weight measuring device, wherein, described weighing structure also includes
Status alert circuit, described status alert circuit is connected with Central Control Module.
Described integral and intelligent child height body weight measuring device, wherein, described weighing structure Weighing body
The process of weight is as follows: measuring instrument starts, and Central Control Module writes down the first current gravity value；Measure
After person stands in panel of weighing, LOAD CELLS detects pressure change output signal, and signal enters filter
Involve amplifying circuit, obtain the second gravity value；Second gravity value signal is adjusted by zeroing circuit,
Obtaining gravimetric value=the second gravity value the-the first gravity value, gravimetric value is final weighing measurement result, in delivering to
Heart control module.
Described integral and intelligent child height body weight measuring device, wherein, described height measurement structure bag
Include:
The horizontal accessory plate of measurement for subsidiary height；
Start the single-point laser module that height is measured；
Send the clock circuit of clock signal；
The first signal amplification circuit that clock signal is amplified；
For launching the ultrasonic transmission device of ultrasonic signal；
Ultrasonic probe, ultrasonic receiver for received ultrasonic signal；
For the second amplifying circuit that ultrasonic signal is amplified；
For calculating the signal calculation circuit of reflex time；
Described single-point laser module is connected with Central Control Module, and clock circuit is with Central Control Module even
Connecing, clock circuit and the first signal amplification circuit connect, the first signal amplification circuit and ultrasonic emitting
Device connects, and ultrasonic probe, ultrasonic receiver and the second amplifying circuit connect, the second amplifying circuit and signal meter
Calculation circuit connects, and signal calculation circuit is connected with Central Control Module.
Described integral and intelligent child height body weight measuring device, wherein, described height measurement structure is surveyed
The process that measures sb.'s height is as follows: after weighing measurement process completes, and Central Control Module controls single-point laser module
Launching a red laser from the bottom up and measure line, the horizontal accessory plate of the hand-held measurement of gauger is positioned over
Before volume, measure horizontal accessory plate height and maintain an equal level with the measured crown, utilize and measure on horizontal accessory plate
Horizontal ruler adjusts level, it is ensured that health does not stop when red laser maintains one section in the case of measuring line
Between, Central Control Module controls clock circuit and starts, and the clock signal of generation is delivered to the first signal and amplified
Circuit, amplified clock signal delivers to ultrasonic transmission device, and it is super that ultrasonic transmission device sends
Sound wave, to after up to measuring horizontal accessory plate, reflects, and is received by ultrasonic probe, ultrasonic receiver and is converted into
The signal of telecommunication, the signal of telecommunication is sent to the second amplifying circuit and is amplified, is then passed to signal calculation circuit
Calculate, draw reflex time, be sent to Central Control Module computed range reflex time, draw height
Value.
A kind of Internet of things system, wherein, including the integral and intelligent child's body as described in above-mentioned any one
High body weight measuring device and the handheld terminal being provided with APP client, described integral and intelligent child height
Body weight measuring device and handheld terminal communication connect.
Described Internet of things system, wherein, also includes cloud server, described cloud server and hands
Hold terminal called to connect.
Beneficial effects of the present invention: the present invention surveys by providing a kind of integral and intelligent child height body weight
Amount instrument and Internet of things system thereof, use weighing structure, height measurement structure and height to measure level auxiliary
Plate, it is achieved that complete body weight simultaneously and height is measured；The result data obtained can be by being wirelessly transferred
To mobile phone, mobile phone A PP manage, or upload cloud server, it is achieved that the height and weight to client
The monitoring of changing condition.
Accompanying drawing explanation
Fig. 1 is the inside connection figure of integral and intelligent child height body weight measuring device in the present invention.
Fig. 2 is the inside connection figure of Internet of things system in the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, referring to the drawings
The present invention is described in more detail for the embodiment that develops simultaneously.
As it is shown in figure 1, a kind of integral and intelligent child height body weight measuring device, including:
For the weighing structure weighed in；
For measuring the height measurement structure of height；
For controlling the properly functioning Central Control Module of whole measuring instrument 300；
Described weighing structure and height measurement structure are the most all connected with Central Control Module 300, by
Heart control module 300 controls to run.
In order to measurement result is shown in real time, described integral and intelligent child height body weight measuring device
Also include the display module 400 for showing height and body weight measurements, described display module 400 with
Central Control Module 300 connects.In the present embodiment, described display module 400 uses LED display.
Data in order to enable to obtain measuring instrument transfer out, it is simple to the statistics of measurement data and research,
Described integral and intelligent child height body weight measuring device also includes for measurement data is passed through wireless telecommunications
The wireless communication module 600 that mode is transmitted, described wireless communication module 600 and Central Control Module
300 connect.
The use of the most whole measuring instrument, described integral and intelligent child height body weight measuring device is also
Including for for whole measuring instrument provide power supply power module 500, described power module 500 respectively with
Weighing structure, height measurement structure, Central Control Module 300, display module 400 and wireless telecommunications mould
Block 600 connects, and provides power supply for each module.
Specifically, described weighing structure includes:
For supporting the panel 110 of weighing of gauger；
It is arranged on the LOAD CELLS 120 for sensing weight change weighing on panel 110；
For filtering weight signal filtered and amplify and amplifying circuit 130；
For the zeroing circuit 140 that weight signal is adjusted；
Described LOAD CELLS 120 is connected with filtering and amplifying circuit 130, filtering and amplifying circuit 130
Being connected with zeroing circuit 140, zeroing circuit 140 is connected with Central Control Module 300, weighing and sensing
Device 120 is connected with Central Control Module 300: during measurement, and measuring instrument starts, and center controls mould
Block 300 writes down current gravity value G1；After gauger stands in panel 110 of weighing, LOAD CELLS 120
Pressure change output signal being detected, signal enters filtering and amplifying circuit 130, obtains gravity value
G2；G2 signal is adjusted by zeroing circuit 140, obtains G=G2-G1, and body weight G is final title
Remeasurement result, is delivered to Central Control Module 300, is shown by LED display.
In order to protect weighing structure will not damage due to overload, reduction of service life, described in weigh knot
Structure also includes status alert circuit 150, and described status alert circuit 150 is with Central Control Module 300 even
Connect: when the weight weighed is beyond the portative scope of measuring instrument institute, status alert circuit will be triggered
150, status alert circuit 150 makes alarm.
Specifically, described height measurement structure includes:
The horizontal accessory plate of measurement 210 for subsidiary height；
Start the single-point laser module 220 that height is measured；
Send the clock circuit 230 of clock signal；
The first signal amplification circuit 240 that clock signal is amplified；
For launching the ultrasonic transmission device 250 of ultrasonic signal；
Ultrasonic probe, ultrasonic receiver 260 for received ultrasonic signal；
For the second amplifying circuit 270 that ultrasonic signal is amplified；
For calculating the signal calculation circuit 280 of reflex time；
Described single-point laser module 220 is connected with Central Control Module 300, clock circuit 230 with in
Heart control module 300 connects, and clock circuit 230 is connected with the first signal amplification circuit 240, and first
Signal amplification circuit 240 is connected with ultrasonic transmission device 250, ultrasonic probe, ultrasonic receiver 260 and
Two amplifying circuits 270 connect, and the second amplifying circuit 270 is connected with signal calculation circuit 280, signal
Counting circuit 280 is connected with Central Control Module 300: during measurement, and weighing measurement process completes
After, Central Control Module 300 control single-point laser module 220 launch from the bottom up a redness swash
Photo measure line, display module 400 points out height to measure, now, when Central Control Module 300 controls
Clock circuit 230 starts, and the clock signal of generation delivers to the first signal amplification circuit 240, time amplified
Clock signal delivers to ultrasonic transmission device 250, and the ultrasound wave that ultrasonic transmission device 250 sends is to up to
After measuring horizontal accessory plate 210, reflect, received by ultrasonic probe, ultrasonic receiver 260 and be converted into electricity
Signal, this signal of telecommunication is sent to the second amplifying circuit 270 and is amplified, and is then passed to signal and calculates
Circuit 280 calculates, and draws T reflex time, and T was sent to Central Control Module 300 and counted reflex time
Calculate distance, draw height values, show finally by LED display.
As in figure 2 it is shown, a kind of Internet of things system, including above-described integral and intelligent child height
Body weight measuring device and the handheld terminal being provided with APP client, described integral and intelligent child height body
Remeasurement instrument and handheld terminal communication connect: integral and intelligent child height body weight measuring device will be measured
The body weight arrived and height data transmit the APP client to handheld terminal.
In the present embodiment, described handheld terminal can be equipped with mobile phone or the IPAD of APP client.
In order to the body weight obtained and height data are added up and studied, described Internet of things system also wraps
Including cloud server, described cloud server is connected with handheld terminal communication: integral and intelligent child's body
Body weight that measurement is obtained by high body weight measuring device and height data are synchronized to the APP client of handheld terminal
End, APP client is taken data syn-chronization by cell phone network or WIFI data transmission device to high in the clouds again
Business device；Cloud server is by the input information with reference to user, the height and weight change shape of statistics client
Condition, thus the health condition of child grows health status or user is carried out record analysis, finally will
Analysis result sends back APP client or sends with note form, simultaneously it is also proposed that more reasonably
Life suggestion (such as quantity of motion, dietary structure, daily schedule, etc.).
The operation of this Internet of things system is as follows: integral and intelligent child height body weight measuring device starts,
LED display shows to be lighted, and Central Control Module 300 writes down current gravity value G1, and gauger stands
After panel 110 of weighing, LOAD CELLS 120 detects pressure change output signal, and signal enters
Entering filtering and amplifying circuit 130, obtain gravity value G2, G2 signal is adjusted by zeroing circuit 140
Whole, obtain G=G2-G1, body weight G is final weighing measurement result, delivers to Central Control Module 300,
Shown by LED display；LED display prompting " please measure height ", center controls mould
Block 300 controls single-point laser module 220 and launches a red laser measurement line from the bottom up, measures
Before the horizontal accessory plate of the hand-held measurement of person 210 is positioned over volume, measure horizontal accessory plate 210 height with tested
The person crown maintains an equal level, and utilizes the horizontal ruler measured on horizontal accessory plate 210 to adjust level, it is ensured that health
Not stopping that red laser is measured in the case of line (keeping 3 seconds), Central Control Module 300 controls clock
Circuit 230 starts, and the clock signal of generation delivers to the first signal amplification circuit 240, amplified clock
Signal delivers to ultrasonic transmission device 250, and the ultrasound wave that ultrasonic transmission device 250 sends is to up to surveying
After measuring horizontal accessory plate 210, reflect, received by ultrasonic probe, ultrasonic receiver 260 and be converted into telecommunications
Number, this signal of telecommunication is sent to the second amplifying circuit 270 and is amplified, and is then passed to signal and calculates electricity
Road 280 calculates, and draws T reflex time, and T was sent to Central Control Module 300 and calculated reflex time
Distance, draws height values, shows finally by LED display, completes height and measures；One
Under body formula intelligence child height body weight measuring device open state, open the APP client of handheld terminal,
APP can automatic matching integral and intelligent child height body weight measuring device；Integral and intelligent child height body
The data do not uploaded recently can temporally be separated and are together uploaded to handheld terminal by remeasurement instrument, and APP can
Classified by user data, the data of multiple users are manually or automatically sorted out；Any
Time user open APP client and can actively or data are set automatically upload measurement data be uploaded to
Cloud server, and data analysis and Health & Fitness Tip can be checked from APP.
The technical program measures horizontal accessory plate by employing weighing structure, height measurement structure and height,
Achieve and complete body weight and height measurement simultaneously；The result data obtained can be by being wirelessly transmitted to hands
Machine, is managed by mobile phone A PP, or uploads cloud server, it is achieved that change the height and weight of client
The monitoring of situation.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, to ordinary skill
For personnel, can be improved according to the above description or convert, all these modifications and variations are all answered
Belong to the protection domain of claims of the present invention.
Claims (10)
1. an integral and intelligent child height body weight measuring device, it is characterised in that including:
For the weighing structure weighed in；
For measuring the height measurement structure of height；
For controlling the Central Control Module that whole measuring instrument is properly functioning；
For the wireless communication module that measurement data is transmitted by wireless communication mode；
Described weighing structure, height measurement structure and wireless communication module the most all with Central Control Module
Connect.
Integral and intelligent child height body weight measuring device the most according to claim 1, its feature exists
In, also include the display module for showing height and body weight measurements, described display module with in
Heart control module connects.
Integral and intelligent child height body weight measuring device the most according to claim 1, its feature exists
In, also include for for whole measuring instrument provide power supply power module, described power module respectively with
Weighing structure, height measurement structure, Central Control Module, display module and wireless communication module connect.
Integral and intelligent child height body weight measuring device the most according to claim 1, its feature exists
In, described weighing structure includes:
For supporting the panel of weighing of gauger；
It is arranged on the LOAD CELLS for sensing weight change weighing on panel；
For filtering weight signal filtered and amplify and amplifying circuit；
For the zeroing circuit that weight signal is adjusted；
Described LOAD CELLS is connected with filtering and amplifying circuit, filtering and amplifying circuit and zeroing circuit
Connecting, zeroing circuit is connected with Central Control Module, and LOAD CELLS is connected with Central Control Module.
Integral and intelligent child height body weight measuring device the most according to claim 4, its feature exists
In, described weighing structure also includes that status alert circuit, described status alert circuit control mould with center
Block connects.
Integral and intelligent child height body weight measuring device the most according to claim 5, its feature exists
In, the process that described weighing structure is weighed in is as follows: measuring instrument starts, and Central Control Module is write down
The first current gravity value；After gauger stands in panel of weighing, LOAD CELLS detects that pressure changes
And output signal, signal enters filtering and amplifying circuit, obtains the second gravity value；Zeroing circuit is to
Two gravity value signals are adjusted, and obtain gravimetric value=the second gravity value the-the first gravity value, and gravimetric value is
Whole weighing measurement result, delivers to Central Control Module.
Integral and intelligent child height body weight measuring device the most according to claim 1, its feature exists
In, described height measurement structure includes:
The horizontal accessory plate of measurement for subsidiary height；
Start the single-point laser module that height is measured；
Send the clock circuit of clock signal；
The first signal amplification circuit that clock signal is amplified；
For launching the ultrasonic transmission device of ultrasonic signal；
Ultrasonic probe, ultrasonic receiver for received ultrasonic signal；
For the second amplifying circuit that ultrasonic signal is amplified；
For calculating the signal calculation circuit of reflex time；
Described single-point laser module is connected with Central Control Module, and clock circuit is with Central Control Module even
Connecing, clock circuit and the first signal amplification circuit connect, the first signal amplification circuit and ultrasonic emitting
Device connects, and ultrasonic probe, ultrasonic receiver and the second amplifying circuit connect, the second amplifying circuit and signal meter
Calculation circuit connects, and signal calculation circuit is connected with Central Control Module.
Integral and intelligent child height body weight measuring device the most according to claim 7, its feature exists
In, it is as follows that described height measurement structure measures height process: after weighing measurement process completes, and center is controlled
Molding block controls single-point laser module and launches a red laser measurement line, gauger's hands from the bottom up
Hold before the horizontal accessory plate of measurement is positioned over volume, measure horizontal accessory plate height and maintain an equal level with the measured crown,
The horizontal ruler measured on horizontal accessory plate is utilized to adjust level, it is ensured that health does not stop that red laser is surveyed
Amount line in the case of maintain a period of time, Central Control Module control clock circuit start, generation time
Clock signal delivers to the first signal amplification circuit, and amplified clock signal delivers to ultrasonic transmission device,
The ultrasound wave that ultrasonic transmission device sends, to after the horizontal accessory plate of up to measurement, reflects, is surpassed
Acoustic receiver device receives and is converted into the signal of telecommunication, and the signal of telecommunication is sent to the second amplifying circuit and is amplified,
It is then passed to signal calculation circuit calculate, draws reflex time, be sent to center control reflex time
Module computed range, draws height values.
9. an Internet of things system, it is characterised in that include as described in any one of claim 1-8
Integral and intelligent child height body weight measuring device and the handheld terminal being provided with APP client, described one
Body formula intelligence child height body weight measuring device and handheld terminal communication connect.
Internet of things system the most according to claim 9, it is characterised in that also include that high in the clouds takes
Business device, described cloud server is connected with handheld terminal communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610365400.1A CN105865601A (en) | 2016-05-26 | 2016-05-26 | Integrated intelligent child height and weight measuring instrument and Internet-of-things system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610365400.1A CN105865601A (en) | 2016-05-26 | 2016-05-26 | Integrated intelligent child height and weight measuring instrument and Internet-of-things system thereof |
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| CN105865601A true CN105865601A (en) | 2016-08-17 |
Family
ID=56642359
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| CN201610365400.1A Pending CN105865601A (en) | 2016-05-26 | 2016-05-26 | Integrated intelligent child height and weight measuring instrument and Internet-of-things system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108937948A (en) * | 2018-09-07 | 2018-12-07 | 湖南简成信息技术有限公司 | A kind of laser height scale and human body component evaluation system |
| CN109556697A (en) * | 2018-11-20 | 2019-04-02 | 陈昕 | A kind of child height weight household monitoring system |
| CN110068820A (en) * | 2019-05-30 | 2019-07-30 | 中山市福瑞康电子有限公司 | A kind of portable ultrasonic height range unit |
| CN111067481A (en) * | 2019-12-10 | 2020-04-28 | 庄雪莲 | Railway passenger health assessment method based on big data technology |
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| CN103968926A (en) * | 2014-05-14 | 2014-08-06 | 杭州云豆科技有限公司 | Intelligent height and weight measuring system |
| CN205719215U (en) * | 2016-05-26 | 2016-11-23 | 佛山朗昊智能科技有限公司 | A kind of integral and intelligent child height body weight measuring device and Internet of things system thereof |
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- 2016-05-26 CN CN201610365400.1A patent/CN105865601A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968926A (en) * | 2014-05-14 | 2014-08-06 | 杭州云豆科技有限公司 | Intelligent height and weight measuring system |
| CN205719215U (en) * | 2016-05-26 | 2016-11-23 | 佛山朗昊智能科技有限公司 | A kind of integral and intelligent child height body weight measuring device and Internet of things system thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108937948A (en) * | 2018-09-07 | 2018-12-07 | 湖南简成信息技术有限公司 | A kind of laser height scale and human body component evaluation system |
| CN109556697A (en) * | 2018-11-20 | 2019-04-02 | 陈昕 | A kind of child height weight household monitoring system |
| CN110068820A (en) * | 2019-05-30 | 2019-07-30 | 中山市福瑞康电子有限公司 | A kind of portable ultrasonic height range unit |
| CN111067481A (en) * | 2019-12-10 | 2020-04-28 | 庄雪莲 | Railway passenger health assessment method based on big data technology |
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Application publication date: 20160817 |