CN106184540A - A kind of multi-function device monitoring child's bicycle speed and control method - Google Patents

A kind of multi-function device monitoring child's bicycle speed and control method Download PDF

Info

Publication number
CN106184540A
CN106184540A CN201610577531.6A CN201610577531A CN106184540A CN 106184540 A CN106184540 A CN 106184540A CN 201610577531 A CN201610577531 A CN 201610577531A CN 106184540 A CN106184540 A CN 106184540A
Authority
CN
China
Prior art keywords
speed
unit
bicycle
bluetooth module
weight
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.)
Pending
Application number
CN201610577531.6A
Other languages
Chinese (zh)
Inventor
潘承民
银柳香
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liuzhou Zhenggao Technology Co Ltd
Original Assignee
Liuzhou Zhenggao Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liuzhou Zhenggao Technology Co Ltd filed Critical Liuzhou Zhenggao Technology Co Ltd
Priority to CN201610577531.6A priority Critical patent/CN106184540A/en
Publication of CN106184540A publication Critical patent/CN106184540A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62KCYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K9/00Children's cycles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62JCYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J3/00Acoustic signal devices; Arrangement of such devices on cycles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62JCYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62JCYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J99/00Subject matter not provided for in other groups of this subclass

Abstract

The invention discloses a kind of multi-function device monitoring child's bicycle speed and control method, specifically include that control unit, the unit that tests the speed, alarm unit, lighting unit, bluetooth module and weight induction unit, such that it is able to overcome child's bicycle riding speed in prior art not limit, guardian supervises negligence or bicycle speed maximum limit arranges unreasonable, cause the defect that peril frequently occurs, overcome child's bicycle not have automatic illuminating function simultaneously, when causing dim, the defect such as peril frequently generation.

Description

A kind of multi-function device monitoring child's bicycle speed and control method
Technical field
The present invention relates to velocity measuring technique field, in particular it relates to a kind of multi-function device monitoring child's bicycle speed And control method.
Background technology
Along with gradually stepping up of people's living standard, people increase the most day by day for the requirement of quality of life, at present, voluntarily Car is increasingly liked by people, not only due to its environmental protection and energy saving, in traffic congestion now so that it is convenient, is also simultaneously The good method of exercise, by single chip application to bicycle so that it is more intelligent, also becomes a kind of direction of research. When people utilize bicycle as the vehicles when, it is necessary to know the travel speed of oneself, alarm device is reminded certainly Oneself takes care, and automatically turns on warning lamp night when to remind surrounding vehicles simultaneously, and minimizing accident occurs;When utilizing certainly The when that driving being as tool movement, just show its speed with greater need for speed measuring device, require time for showing and oneself move How long, how far travel, utilized how temperature detection understands ambient temperature, fitted and be not suitable for motion.Velocity measuring technique is in state Inside and outside application is widely, the most ripe, and method is also a lot, and such as ultrasound wave tests the speed, and infrared tests the speed, and laser velocimeter etc. is contour The velocity measuring technique of science and technology, has been applied simultaneously to every field, and wherein field of traffic is the most extensive, but this non-for bicycle For motor vehicles, also due to itself speed is not reason quickly, testing the speed, it is extensive not enough to be applied on bicycle, and For tempering the vehicles as environmental protection and energy saving, in occupation of critically important effect in people's daily life, this is also Increase it dangerous, with greater need for making it more intelligent, be the most no matter both at home and abroad for pay attention to the most not enough.Cause This, no matter bicycle is as the vehicles or body building, is required for it the most perfect, makes it more intelligent, Make it safer as the vehicles, make its multifunction as body building, the life being convenient for people to
The bicycle kind of child is a lot of now, owing to child is the most ripe to the cognition of speed, does not knows about the car of bicycle The harm that may bring of speed, it is therefore desirable to the head of a family supervises child, it is to avoid the most fond of play cause bicycle speed too fast, thus cause Dangerous generation.
During realizing the present invention, inventor finds at least to exist not for the row to bicycle in prior art Vehicle speed is monitored the defects such as means.
Summary of the invention
It is an object of the invention to, for the problems referred to above, propose a kind of multi-function device monitoring child's bicycle speed And control method, to realize bicycle overspeed warning, and remind guardian to guard, maximum is set according to vehicle load simultaneously The restriction of speed, prevents the difference due to inertia, causes the max speed to arrange unreasonable, causes peril to occur, reduces Accident rate.
For achieving the above object, the technical solution used in the present invention is: a kind of monitor the multi-functional of child's bicycle speed Device, specifically includes that control unit, the unit that tests the speed, alarm unit, lighting unit, bluetooth module and weight induction unit, described Test the speed unit, alarm unit, bluetooth module and weight induction unit is connected with control unit respectively, and described lighting unit includes light Line Acquisition Circuit and illumination LED, light Acquisition Circuit gathers surrounding light, and controller controls illumination according to light intensity The light on and off of LED, described weight induction unit sensing weight signal, described in the unit that tests the speed include that at least one is forever for measuring speed Magnet, switching Hall components sensor circuit for a long time, described permanent magnet is installed on wheel rim, switching Hall components sensor Circuit acquisition pulse signal, controller counts according to pulse signal, and calculates bicycle speed, and controller controls bluetooth Speed data is sent client in the way of being wirelessly transferred by module, and warning circuit is for reporting when speed exceedes setting value Alert.
Further, also include LCD MODULE, be used for showing car speed.
Further, the control method of multi-function device based on monitoring child's bicycle speed, comprise the following steps:
A. weight induction unit sensing vehicle load, and weight signal is sent to controller;
B. controller is according to the weight pre-set-speed correspondence table, searches the max speed value that vehicle load is corresponding;
C. the unit that tests the speed measures bicycle speed, it is judged that whether current vehicle speed exceedes the max speed value, if exceeding the max speed Value, then trigger warning circuit and report to the police, and the bluetooth module of controller control simultaneously is placed in duty, is sent by current speed value To having the client of function of Bluetooth communication, and performing step D, otherwise warning circuit is not reported to the police, and bluetooth module is in dormancy shape State;
D. judging whether speed falls below in the range of the max speed value, if judging, speed falls below the max speed value In the range of time, stop alarm, and the velocity amplitude after stop alarm is sent to client by bluetooth module, otherwise, continue Report to the police, continue detection vehicle speed value.
Various embodiments of the present invention, owing to specifically including that control unit, the unit that tests the speed, alarm unit, bluetooth module and weight Amount sensing unit, described in test the speed unit, alarm unit, lighting unit, bluetooth module and weight induction unit respectively with control single Unit connects, described weight induction unit sensing weight signal, described in the unit that tests the speed include that at least one is permanent for measuring speed Magnet, switching Hall components sensor circuit, described permanent magnet is installed on wheel rim, switching Hall components sensor electricity Road acquisition pulse signal, controller counts according to pulse signal, and calculates bicycle speed, and controller controls bluetooth mould Speed data is sent client in the way of being wirelessly transferred by block, and warning circuit is for reporting when speed exceedes setting value Alert, described power module is to other each module for power supply;Such that it is able to overcome child's bicycle riding speed in prior art not have Limiting, guardian supervises negligence or bicycle speed maximum limit arranges unreasonable, causes peril frequently to occur Defect, overcomes child's bicycle not have automatic illuminating function simultaneously, and when causing dim, peril frequently generation etc. lacks Fall into..
Other features and advantages of the present invention will illustrate in the following description, and, partly become from description Obtain it is clear that or understand by implementing the present invention.
Below by embodiment, technical scheme is described in further detail.
Detailed description of the invention
Hereinafter the preferred embodiments of the present invention are illustrated, it will be appreciated that preferred embodiment described herein is only used In the description and interpretation present invention, it is not intended to limit the present invention.
Specifically, a kind of multi-function device monitoring child's bicycle speed, specifically include that control unit, the unit that tests the speed, Alarm unit, lighting unit, bluetooth module and weight induction unit, described in test the speed unit, alarm unit, bluetooth module and weight Sensing unit is connected with control unit respectively, and described lighting unit includes light Acquisition Circuit and illumination LED, light Acquisition Circuit Gathering surrounding light, controller controls the light on and off of illumination LED, described weight induction unit sensing weight according to light intensity Signal, described in the unit that tests the speed include at least one permanent magnet, switching Hall components sensor circuit, institute for measuring speed Stating permanent magnet to be installed on wheel rim, switching Hall components sensor circuit acquisition pulse signal, controller is believed according to pulse Number counting, and calculate bicycle speed, controller controls bluetooth module and speed data is sent out in the way of being wirelessly transferred Sending client, warning circuit is for reporting to the police when speed exceedes setting value.
Also include LCD MODULE, be used for showing car speed.
The control method of multi-function device based on monitoring child's bicycle speed, comprises the following steps:
A. weight induction unit sensing vehicle load, and weight signal is sent to controller;
B. controller is according to the weight pre-set-speed correspondence table, searches the max speed value that vehicle load is corresponding;
C. the unit that tests the speed measures bicycle speed, it is judged that whether current vehicle speed exceedes the max speed value, if exceeding the max speed Value, then trigger warning circuit and report to the police, and the bluetooth module of controller control simultaneously is placed in duty, is sent by current speed value To having the client of function of Bluetooth communication, and performing step D, otherwise warning circuit is not reported to the police, and bluetooth module is in dormancy shape State;
D. judging whether speed falls below in the range of the max speed value, if judging, speed falls below the max speed value In the range of time, stop alarm, and the velocity amplitude after stop alarm is sent to client by bluetooth module, otherwise, continue Report to the police, continue detection vehicle speed value..
Assuming that the Zhou Changwei L of wheel rim, install m permanent magnet on wheel rim, then the mileage value maximum error recorded is L/ m.Analyze through comprehensive, the design takes m=2.When wheel every revolution, by switching Hall components sensor acquisition to Pulse signal, and interrupt 0 end input from pin P3.2, sensor often obtains a pulse signal and i.e. once counts system offer Interrupt.Interrupting representing vehicle wheel rotation half-turn, it is mileage value that the product of the perimeter L interrupting number n and wheel rim is multiplied by m more every time.Regularly Device T0 timing 1s just can calculate instantaneous velocity v.When v is more than the speed limit set, send sound and light alarm.
Hall device has many advantages, their sound construction, volume are little, lightweight, life-span length, easy for installation, merit Consume little, frequency is high (up to 1MHz), vibration resistance, the pollution not being afraid of dust, greasy dirt, steam and smog etc. or corrosion.Hall is linear The precision of device is high, the linearity is good;Hall switch device is contactless, nothing is worn and torn, output waveform is clear, non-jitter, nothing are knock-oned, position Put repeatable accuracy high.Take the hall device operating temperature range width of various compensation and protective measure, up to-55 DEG C~150 ℃.Can divide them into according to the function of hall device: Hall linear unit and Hall switch device, the former exports analog quantity, The latter exports digital quantity.Their application can be divided into by the character of detected object: directly application and indirect application.The former Being magnetic field or the magnetic characteristic directly detecting object under inspection itself, the latter is the artificial magnetic field arranged on detection detected object, The carrier of the information being detected is made with this magnetic field.By it, by many non-electrical, physical quantity such as power, moment, the positions of non-magnetic Put, time etc. that displacement, speed, acceleration, angle, angular velocity, revolution, rotating speed and duty change, be transformed into Electricity detects and controls.
A44E Integrated Hall switch is by manostat A, Hall voltage generator (i.e. silicon Hall plate) B, difference amplifier C, close Special trigger D and five essential part compositions of OC door output E, at power end making alive Vcc, be added in Hall after manostat voltage stabilizing The two ends of electric potential generator, according to Hall effect principle, when Hall plate is in magnetic field, pass in the direction being perpendicular to magnetic field Electric current, then will produce Hull voltage VH output with on both perpendicular direction, and the amplified device of VH signal send after amplifying To Schmidt trigger shaping so that it is become square wave and be transported to the output of OC door.When the magnetic field applied reaches operating point, trigger is defeated Going out high voltage (relative to earth potential), make triode ON, now OC gate output terminal output low-voltage, the most this state is Open.When the magnetic field applied reaches point of release, trigger output low-voltage, audion ends, makes OC door output HIGH voltage, this State is for closing.Such twice voltage transformation, makes Hall switch complete a switch motion.Operating point and the difference one of point of release Fixed, this difference is referred to as magnetic hysteresis, and in this difference, V0 keeps constant, thus makes switch output reliable and stable, this namely current collection become Hall switch passes
One of sensor good characteristic.Sensor key property is its output characteristics, i.e. input magnetic induction density B and output voltage Relation between V0.
It has been investigated that, the event of carriage for children disaster, occur in the case of light is very dark the most around, therefore arrange certainly Dynamic lighting module so that in the case of dim, provide strong illumination for child, it is to avoid the generation of peril.
Bluetooth module is set so that client is set up wireless telecommunications with the speed measuring device of child and is connected, thus accomplishes the moment Supervision child's speed, when beyond setting speed, reminding guardian the most at once, is supervised child's reduction of speed by guardian, meanwhile, works as car After hypervelocity, warning circuit can be reported to the police it is known that speed drops to certain speed, it is to avoid due to negligence, causes irremediable Dire consequences.
Weight induction module, and weight preset to controller (single-chip microcomputer)-max. speed correspondence table are set, (described weight- Max. speed correspondence table is to draw rational correspondence according to numerous experiments), eliminate the difference due to vehicle load, inertia is not With, same maximum speed is set, normalized mode increases the probability of the generation of peril.
At least can reach following beneficial effect: overcome child's bicycle riding speed in prior art not limit, prison Superintend and direct that people is careless and inadvertent or bicycle speed maximum limit arranges unreasonable, cause the defect that peril frequently occurs, simultaneously gram Take child's bicycle and not there is automatic illuminating function, when causing dim, the defect such as peril frequently generation..
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention, Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent. All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's Within protection domain.

Claims (3)

1. the multi-function device monitoring child's bicycle speed, it is characterised in that include control unit, the unit that tests the speed, report Alert unit, lighting unit, bluetooth module and weight induction unit, described in test the speed unit, alarm unit, bluetooth module and weight sense Answering unit to be connected with control unit respectively, described lighting unit includes that light Acquisition Circuit and illumination LED, light Acquisition Circuit are adopted Collection surrounding light, controller controls the light on and off of illumination LED, described weight induction unit sensing weight letter according to light intensity Number, described in the unit that tests the speed include at least one permanent magnet, switching Hall components sensor circuit for measuring speed, described Permanent magnet is installed on wheel rim, and switching Hall components sensor circuit acquisition pulse signal, controller is according to pulse signal Counting, and calculate bicycle speed, controller controls bluetooth module and speed data is sent in the way of being wirelessly transferred Client, warning circuit is for reporting to the police when speed exceedes setting value.
The multi-function device of monitoring child's bicycle speed the most according to claim 1, it is characterised in that also include liquid crystal Display module, is used for showing car speed.
3. a control method for multi-function device based on the monitoring child's bicycle speed described in claim 2, its feature It is, comprises the following steps:
A. weight induction unit sensing vehicle load, and weight signal is sent to controller;
B. controller is according to the weight pre-set-speed correspondence table, searches the max speed value that vehicle load is corresponding;
C. the unit that tests the speed measures bicycle speed, it is judged that whether current vehicle speed exceedes the max speed value, if exceeding the max speed Value, then trigger warning circuit and report to the police, and the bluetooth module of controller control simultaneously is placed in duty, is sent by current speed value To having the client of function of Bluetooth communication, and performing step D, otherwise warning circuit is not reported to the police, and bluetooth module is in dormancy shape State;
D. judging whether speed falls below in the range of the max speed value, if judging, speed falls below the max speed value In the range of time, stop alarm, and the velocity amplitude after stop alarm is sent to client by bluetooth module, otherwise, continue Report to the police, continue detection vehicle speed value.
CN201610577531.6A 2016-07-21 2016-07-21 A kind of multi-function device monitoring child's bicycle speed and control method Pending CN106184540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610577531.6A CN106184540A (en) 2016-07-21 2016-07-21 A kind of multi-function device monitoring child's bicycle speed and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610577531.6A CN106184540A (en) 2016-07-21 2016-07-21 A kind of multi-function device monitoring child's bicycle speed and control method

Publications (1)

Publication Number Publication Date
CN106184540A true CN106184540A (en) 2016-12-07

Family

ID=57491946

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610577531.6A Pending CN106184540A (en) 2016-07-21 2016-07-21 A kind of multi-function device monitoring child's bicycle speed and control method

Country Status (1)

Country Link
CN (1) CN106184540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113568344A (en) * 2018-03-15 2021-10-29 北京骑胜科技有限公司 Method and system for controlling bicycle based on pressure detection

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264791A (en) * 1991-02-18 1993-11-23 Cat Eye Co., Ltd. Bicycle computer speed sensor and housing assembly having improved housing seal
CN202156353U (en) * 2011-05-30 2012-03-07 山东理工大学 Display alarm device for speed limit based on load
CN204388865U (en) * 2015-02-10 2015-06-10 杭州云造科技有限公司 A kind of intelligent networking terminal for child's bicycle
CN105365925A (en) * 2015-12-08 2016-03-02 玉林师范学院 Internet-based bicycle-mounted system with self-electricity-generating and self-locking functions
CN105620601A (en) * 2016-03-30 2016-06-01 钦州市外国语学校 Bicycle safety riding monitor
CN205345261U (en) * 2016-01-29 2016-06-29 杭州云造科技有限公司 Intelligence electric bicycle control system based on thing networking

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264791A (en) * 1991-02-18 1993-11-23 Cat Eye Co., Ltd. Bicycle computer speed sensor and housing assembly having improved housing seal
CN202156353U (en) * 2011-05-30 2012-03-07 山东理工大学 Display alarm device for speed limit based on load
CN204388865U (en) * 2015-02-10 2015-06-10 杭州云造科技有限公司 A kind of intelligent networking terminal for child's bicycle
CN105365925A (en) * 2015-12-08 2016-03-02 玉林师范学院 Internet-based bicycle-mounted system with self-electricity-generating and self-locking functions
CN205345261U (en) * 2016-01-29 2016-06-29 杭州云造科技有限公司 Intelligence electric bicycle control system based on thing networking
CN105620601A (en) * 2016-03-30 2016-06-01 钦州市外国语学校 Bicycle safety riding monitor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113568344A (en) * 2018-03-15 2021-10-29 北京骑胜科技有限公司 Method and system for controlling bicycle based on pressure detection
CN113641121A (en) * 2018-03-15 2021-11-12 北京骑胜科技有限公司 Method and system for controlling bicycle based on pressure detection
US11926383B2 (en) 2018-03-15 2024-03-12 Beijing Qisheng Science And Technology Co., Ltd. Systems and methods for controlling an object

Similar Documents

Publication Publication Date Title
CN106443049A (en) Apparatus for monitoring bicycle speeds of children, and control method
CN106097740A (en) A kind of bicycle safe monitor and alarm system and control method
CN106184540A (en) A kind of multi-function device monitoring child's bicycle speed and control method
CN106218765A (en) A kind of multi-function device monitoring child's bicycle speed and control method
CN106043526A (en) Multifunctional device for monitoring velocity of children's bicycle and control method thereof
CN106226551A (en) A kind of child's bicycle speed-limiting device and control method
CN106114723A (en) A kind of child's bicycle speed-limiting device and control method
CN106218761A (en) A kind of child's bicycle speed-limiting device and control method
CN106226550A (en) A kind of child's bicycle speed-limiting device and control method
CN106226554A (en) A kind of bicycle safe monitoring prompt system and control method
CN106097729A (en) A kind of bicycle speed monitor and alarm system and control method
CN106199047A (en) A kind of device monitoring child's bicycle speed and control method
CN106184515A (en) A kind of multi-function device monitoring child's bicycle speed and control method
CN106226553A (en) A kind of device by NFC monitoring child's bicycle speed and control method
CN106199042A (en) A kind of multi-function device monitoring child's bicycle speed and control method
CN106218760A (en) A kind of multi-function device monitoring child's bicycle speed and control method
CN106275152A (en) One has illumination functions bicycle safe monitor and alarm system and control method
CN106184502A (en) One has illumination functions bicycle safe monitor and alarm system and control method
CN106218762A (en) A kind of device and control method that bicycle the max speed is set according to vehicle load
CN106226552A (en) A kind of child's bicycle speed-limiting device and control method
CN106405141A (en) Apparatus of monitoring child cycling speed and realizing automatic illumination and control method thereof
CN106199049A (en) A kind of child's bicycle speed-limiting device and control method
CN106275166A (en) A kind of device and control method that bicycle the max speed is set according to vehicle load
CN106143702A (en) One has illumination functions bicycle safe monitor and alarm system and control method
CN106184501A (en) A kind of child of monitoring cycles speed the device realizing automatic illuminating and control method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 545005 new willow Avenue, Liuzhou, Liuzhou, the Guangxi Zhuang Autonomous Region, No. 2, 20 floors 9, city E District

Applicant after: LIUZHOU ZHENGGAO TECHNOLOGY CO., LTD.

Address before: Building 545005 the Guangxi Zhuang Autonomous Region Liuzhou Liunan City Station Road No. 94, a new era of commercial port logistics warehousing center No. 5 Floor 4 No. 022

Applicant before: LIUZHOU ZHENGGAO TECHNOLOGY CO., LTD.

WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20161207