CN213756864U - Intelligent safety helmet of electric bicycle - Google Patents
Intelligent safety helmet of electric bicycle Download PDFInfo
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- CN213756864U CN213756864U CN202022776227.9U CN202022776227U CN213756864U CN 213756864 U CN213756864 U CN 213756864U CN 202022776227 U CN202022776227 U CN 202022776227U CN 213756864 U CN213756864 U CN 213756864U
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Abstract
The utility model discloses an electric bicycle intelligent safety helmet belongs to the helmet field. The helmet comprises a helmet body, a sensor group, an LED lamp group, a storage battery, a button, a buzzer, a flexible solar panel and a main control module, wherein the LED lamp group, the storage battery, the button, the buzzer, the flexible solar panel and the main control module are arranged on the helmet body; the helmet body comprises a helmet outer shell, a sponge inner lining body and an elastic helmet belt buckle; the sensor group comprises a pressure sensor, a tension sensor, a first angle sensor, a second angle sensor, a photosensitive sensor and an acceleration sensor. The LED group comprises steering indicating lamps (yellow) arranged on the left side and the right side of the rear end of the shell and tail lamps (red) in the middle; the flexible solar panel covers the outer side of the helmet body, the storage battery and the buzzer are arranged in the helmet body, and the button is arranged on the front side of the helmet body; the utility model discloses a helmet can ensure that the user better and other drivers carry out the information interaction on the road, guarantee driver safe driving, standardizes user's the helmet condition of wearing.
Description
Technical Field
The utility model belongs to the helmet field especially relates to an electric bicycle intelligent safety helmet.
Background
The electric bicycle is an energy-saving and environment-friendly vehicle, daily travel of most people is met, the helmet is necessary to be worn during riding in order to guarantee driving safety of drivers, but people forget to turn on the steering indicating lamp during riding and turning, or the steering indicating lamp of the electric bicycle is not obvious, or road participants need to be informed due to self or external reasons during riding, it is necessary to strengthen road information interaction through the helmet, and accidents of users are avoided.
Disclosure of Invention
An object of the utility model is to overcome prior art's is not enough, provides an electric bicycle intelligent safety helmet, possesses higher road interaction performance to can guarantee just can normal use this helmet under the condition of normally wearing the good helmet, standardize the helmet condition of wearing, improve user's driving vehicle security.
In order to achieve the above purpose, the present invention adopts the following technical solution.
An intelligent safety helmet for an electric bicycle comprises a helmet body, a sensor group, an LED lamp group, a storage battery, a button, a buzzer and a main control module, wherein the LED lamp group, the storage battery, the button, the buzzer and the main control module are installed on the helmet body;
the helmet body comprises a helmet outer shell, a sponge inner lining body and an elastic helmet belt buckle; the sponge inner lining body is positioned inside the helmet shell, and a groove for installing the sensor group and the main control module is formed in the sponge inner lining body; two ends of the elastic hat band buckle are arranged at two sides of the bottom of the helmet shell;
the sensor group comprises a pressure sensor, a tension sensor, a first angle sensor, a second angle sensor, a photosensitive sensor and an acceleration sensor; the pressure sensors are uniformly distributed on the sponge inner lining body in four directions, namely front, back, left and right directions, and each pressure sensor is provided with an elastic component; the first angle sensor is pasted at the head of the electric bicycle, and the second angle sensor and the acceleration sensor are arranged in the middle of the sponge inner lining body; the tension sensor is arranged on the elastic hat band buckle, and the photosensitive sensor is fixed on the rear side of the helmet shell;
the LED lamp group is arranged in the middle of the rear side of the helmet shell and consists of a left steering indicator lamp, a right steering indicator lamp, a middle tail lamp and a bottom reflecting strip;
the storage battery is arranged at the rear lower part of the helmet body, and the buzzer and the button are respectively fixed at two sides of the helmet body; the sensor group, the LED lamp group, the button, the buzzer and the main control module are all powered by a storage battery, and the sensor group, the LED lamp group, the button and the buzzer are all connected with the main control module.
Compared with the prior art, the utility model has the advantages that:
1) the utility model discloses an angle sensor acquires the information that electric bicycle turned, and the first angle sensor who wherein is located the headstock position accepts the information that comes from the inclination that turns to about the electric bicycle wheel, again with the wireless receiver of information feedback to the host system on. The second angle sensor positioned in the helmet inner lining body receives information of left and right steering angles of a driver wearing the helmet, the information of the two information sources is analyzed by the main control module, and the steering direction priority of the steering indicating lamp of the helmet influenced by the information from the two information sources is allocated by the main control module.
2) The utility model discloses a helmet is equipped with urgent warning button, when the driver meets the unexpected condition and need promptly stop, can be through the mode control LED banks scintillation of pressing the button, arouse past vehicle and crowd's attention.
3) The utility model discloses a pressure sensor install four positions around the helmet inboard, have set up elastomeric element on each pressure sensor, have guaranteed that the user head and pressure sensor fully contact when wearing the helmet. In addition, a tension sensor of the hat belt buckle can detect whether the user correctly wears the hat belt buckle, and when the main control module detects that the helmet is worn and the wearing is incorrect, the buzzer always gives out a light sound warning sound. Only when the helmet is worn successfully, the buzzer stops after two sounds are emitted to make normal wearing sounds.
4) The utility model discloses realize reporting to the police through host system control buzzer according to all safety information that acquire, bee calling organ can be according to the different chimes of doom of the broadcast of the alarm content of difference to vibrate the warning in reporting to the police, avoid the driver to ignore alarm information in noisy environment.
Drawings
Fig. 1 is a schematic overall structure diagram of an intelligent safety helmet for an electric bicycle in the present embodiment;
fig. 2 is a sectional view of the internal structure of the intelligent safety helmet for electric bicycles in the embodiment;
FIG. 3 is a top view of the intelligent safety helmet for electric bicycle in this embodiment;
fig. 4 is a schematic view of the installation positions of the pressure sensor, the angle sensor and the acceleration sensor inside the helmet in the embodiment;
fig. 5 is a schematic diagram of a control method between the sensor group and the main control module in the present embodiment;
in the figure: 1 helmet body, 101 helmet shell, 102 sponge inner lining, 103 elastic hat buckle, 104 spring, 105 sponge contact, 106 first slot, 107 second slot, 108 standby slot, 109 transparent rainproof mirror, 110 jaw guard; 201 pressure sensor, 202 tension sensor, 203 angle sensor, 204 light sensor, 205 acceleration sensor; 301 left and right steering indicator lamps, 302 middle tail lamps and 303 bottom reflecting strips; 4, a storage battery; 5, a button; 6, a buzzer; 7 a flexible solar panel; 8, a main control module.
Detailed Description
The invention will be further explained and explained with reference to the drawings.
In order to improve electric bicycle and improve road interaction ability under the prerequisite that the road went, for user's safety protection drives the protection navigation to standardize the helmet and wear the condition, the utility model provides an electric bicycle intelligent safety helmet, can interact between electric bicycle and the helmet. The overall structure is shown in fig. 1-3, and the intelligent safety helmet comprises: helmet body 1, sensor group and install LED banks, battery 4, button 5, bee calling organ 6, flexible solar panel 7 and the master control module 8 on helmet body.
The helmet body comprises a helmet outer shell 101, a sponge inner lining body 102 and an elastic helmet buckle 103; the sponge inner lining body 102 is positioned inside the helmet shell 101, and a groove for installing a sensor group and a main control module is formed in the sponge inner lining body 102; two ends of the elastic hat band buckle 103 are arranged at two sides of the bottom of the helmet shell 101; the flexible solar panel 7 covers the helmet shell 101, and the flexible solar panel 7 is connected with the charging end of the storage battery 4;
the sensor group comprises a pressure sensor 201, a tension sensor 202, an angle sensor 203, a photosensitive sensor 204 and an acceleration sensor 205; the angle sensors are two and comprise a first angle sensor and a second angle sensor. As shown in fig. 3 and 4, the pressure sensors 201 are uniformly distributed on the sponge inner lining 102 in four directions, namely front, back, left and right directions, and each pressure sensor is provided with an elastic component; the first angle sensor is pasted at the head of the electric bicycle, and the second angle sensor and the acceleration sensor are arranged in the middle of the sponge inner lining body; the tension sensor 202 is arranged on the elastic hat band buckle, and the photosensitive sensor is fixed on the rear side of the helmet shell;
the LED lamp set is arranged in the middle of the rear side of the helmet shell and consists of a left steering indicator lamp 301, a right steering indicator lamp 301, a middle tail lamp 302 and a bottom reflecting strip 303;
the storage battery 4 is arranged at the rear lower part of the helmet body 1, and the buzzer 6 and the button 5 are respectively fixed at two sides of the helmet body 1; the sensor group, the LED lamp group, the button 5, the buzzer 6 and the main control module 8 are all powered by the storage battery 4, and the sensor group, the LED lamp group, the button and the buzzer are all connected with the main control module.
In one embodiment of the present invention, the main control module 8 is mainly used for receiving signals and comparing the signals with a set threshold; specifically, the helmet is used for receiving signals in the sensor group, comparing the signals with a normal threshold value of each sensor or a numerical value corresponding to a posture when the helmet is worn, and determining that the helmet is not worn normally when data of any sensor exceeds a set threshold value range, so that a light sound warning instruction is sent to the buzzer through the main control module. Preferably, the utility model discloses a buzzer includes audio unit and vibration unit, and the storage has the alarm sound of different grade type in the audio unit, and the vibration unit is opened automatically in the audio unit work, can realize playing different alarm sound according to the alarm content of difference to vibrate the warning in the warning, avoid the driver to ignore alarm information in noisy environment.
The utility model discloses a more comprehensive information can be obtained to the form of sensor group, as shown in fig. 5, wherein:
the helmet is provided with pressure sensors 201, wherein the pressure sensors are arranged in the sponge inner lining body in four directions, namely front, back, left and right, and each pressure sensor is provided with an elastic component, so that the situation that the head of a user is in full contact with the helmet when the user wears the helmet can be guaranteed, pressure data can be obtained, and if the pressure is not in a preset interval, the user is judged not to wear the helmet. In a specific embodiment of the present invention, the elastic member comprises a spring 104 and a sponge contact 105, one end of the spring is connected to the pressure sensor, the other end of the spring is connected to the sponge contact, and the sponge contact should protrude from the inner lining of the sponge to fully contact with the head of the wearer.
The helmet is provided with photosensitive sensor 204, and wherein photosensitive sensor sets up in helmet shell's rear side, can gather the light intensity of annex environment, if the light intensity of gathering is less than the light intensity of predetermineeing the threshold value, then judges that user's body department light is relatively weak, the environment of extra light filling needs to send the instruction of bright lamp to the tail lamp through host system, be convenient for on the road by hou mian pedestrian or navigating mate discovery.
The helmet is provided with acceleration sensor 205, wherein acceleration sensor sets up helmet body's the sponge in the middle part recess of the interior bushing body, can gather the change of electric bicycle acceleration, if the acceleration of gathering reduces in a certain time, then judge that electric bicycle needs the brake slow down to walk slowly under certain circumstances, need warn the rear vehicle to send the instruction of bright lamp to the tail lamp through host system, if electric bicycle is originally just in the dark surrounds, the tail lamp is originally just bright, the luminous intensity of bright lamp or warn the rear vehicle with the mode of tail lamp scintillation can be strengthened to the tail lamp.
The helmet is provided with a tension sensor 202, wherein the tension sensor is arranged on the elastic hat band buckle and is connected with the storage battery and the main control module. When the user tightens the headgear strap, a pull force datum can be obtained. If the tension data is larger than a certain threshold value, the user is indicated and the helmet is worn. When the main control module detects that the helmet is worn and the wearing is incorrect, the buzzer always gives out a light sound warning sound. Only when the helmet is worn successfully, the buzzer stops after two sounds are emitted to make normal wearing sounds. The utility model discloses an in the concrete implementation, in order to avoid the hatband to break away from people's chin department very easily and lead to the pulling force value to change, movable mounting has the chin guard cover 110 on the elasticity hatband is buckled, and the material of chin guard cover is any one of rubber, plastics, fabric, has both guaranteed the travelling comfort of wearing, makes the hatband easily fixed again, does not drop.
The utility model discloses a guarantee that the user drives safety, still be equipped with LED banks on helmet shell, LED banks install the rear side in the helmet body outside, by controlling the reflection of light strip that turns to tail lamp (red) and bottom of pilot lamp (yellow), middle part and constitute. The outer surface is stuck with a rain-proof layer; whether the LED lamp is controlled to light by the main control module, the safety of riding under certain dim light environment is improved by the reflective strip, and the road interaction capacity and the safety of the electric bicycle are improved through the LED lamp bank.
What work with LED banks cooperatees is the angle sensor who sets up, and wherein angle sensor has two, is first angle sensor and second angle sensor respectively. Wherein first angle sensor pastes in electric bicycle front head department, and second angle sensor is located helmet body's inside. If the wheel steering acquired by the first angle sensor exceeds a preset left-right steering interval, judging that the electric bicycle is performing left-right steering, sending a steering instruction to left-right steering indicator lamps through the main control module, and lighting and flashing corresponding steering indicator lamps; and if the information acquired by the second angle sensor and converted by the helmet exceeds the set left and right steering angle threshold, controlling the corresponding left and right steering indicator lamps to light and flash, and controlling the corresponding left and right steering indicator lamps to stop flashing when the angle information obtained by the angle sensors at the wheels returns to the position below the set left and right steering threshold. Because most people turn their heads first to turn in the direction to be turned and the turning angle is larger than the non-turning direction, which is also the case of the master control module, the turning direction priority of the affected helmet turning indicator light transmitted from the two information sources is allocated by the master control module.
The utility model discloses an in the implementation, realize the communication through wireless between first angle sensor and the host system. Specifically, the main control module on the integrated installation be equipped with wireless receiver, first angle sensor on install wireless transmitter, wireless receiver and first angle sensor wireless communication be connected.
The helmet is provided with button 5, installs the front side in the helmet body outside, and through pressing the button, two turn to pilot lamps of master control module control and tail lamp all twinkle simultaneously and light, if will stop, then need press the button once more. It may be activated when the driver is in an emergency stop or encounters other emergency conditions, with priority over all sensors.
The utility model discloses an in the implementation, bee calling organ and battery are all installed in helmet shell's draw-in groove for the first draw-in groove 106 setting of installation bee calling organ is close to the ear in the both sides of helmet, is equipped with the baffle of taking the bleeder vent on the first draw-in groove, and the sound of being convenient for is propagated. A second draw-in groove 107 for installing the battery is located helmet body's rear below, in order to avoid external environment to intake pollution battery such as water, is equipped with sealing baffle on the second draw-in groove. In addition, a spare card slot 108 is arranged on the shell of the helmet and used for storing the first angle sensor when the first angle sensor is not installed on the electric bicycle.
As with conventional helmets, in order to be worn in rainy weather, the utility model discloses a helmet is equipped with transparent rain-proof mirror 109. In order to make the helmet lighter, the utility model discloses a rain-proof mirror demountable installation is on helmet body, and the overall dimension of rain-proof mirror is identical with the notch overall dimension on the helmet shell.
The utility model discloses an in the implementation, the utility model discloses a helmet can realize the communication with user's mobile terminal, for example utilize communication module, like realization such as wireless network form, bluetooth form, with user's the state of riding real-time feedback to mobile terminal to record alarm information every time.
It should be noted that the main control module adopted in the present invention may be an STM32 series embedded micro control chip, and the internal voltage adjustment module generates voltages (3.3V, 2.5V, etc.) required inside the chip, for example, in this embodiment, a 32-bit microcontroller based on an ARM Cortex-M core STM32 series, of which the model is STM32F103C8T6, is adopted, the capacity is 64KB, and the operating temperature is-40 ℃ to 85 ℃. The process of thresholding the sensor data using the control chip is exactly the same as in the prior art.
The utility model discloses the function that can realize has:
1. only when the user correctly wears the helmet, the helmet buzzer can stop warning, and meanwhile, the vibration is matched in the warning process, so that the wearer can sense warning information in a noisy environment.
2. In the riding process, when a driver wants to turn, the helmet can predict whether the driver wants to turn left or right in advance, and a corresponding steering indicating lamp is turned on through the main control module.
3. When the helmet is ridden, the user or an external emergency reason is met, the LED lamp set of the helmet can be lightened by pressing the button, and the warning effect is achieved.
The utility model discloses realize that the concrete process of above-mentioned function does:
before riding: when the user rides electric bicycle, the car has not started yet, and the driver begins to wear the helmet, pressure sensor and driver's head contact obtain the pressure value, simultaneously, the driver detains the elasticity hatband and gives and detain, produces the pulling force to the hatband, tension sensor passes to main control module with the pulling force value, the acceleration sensor that is located helmet body inside can detect whether the vehicle starts, pressure value and acceleration value pass to main control module.
If the user wears the helmet correctly, the value detected by the sensor is within a preset threshold value, and the buzzer stops warning; if the driver does not fasten the cap buckle, the pulling force value is smaller than the threshold value or the user leans to the head to wear the helmet, so that the pressure sensors in the four directions of the front, the back, the left and the right inside the helmet body detect that the pressure values are not in the preset range or the driver starts the vehicle under the condition that the helmet is not worn, the helmet can continuously give an alarm, and the alarm information is uploaded to the mobile terminal through the communication module. Therefore, the master control module can comprehensively judge the helmet wearing condition of the driver through the detection data of various sensors, so that a correct instruction is further made for the buzzer to remind the driver of the helmet wearing condition.
In riding: when the driver correctly wears the helmet, the electric bicycle is driven. If the driver takes off the helmet in the driving process, the buzzer can give out warning sound.
When a driver drives the electric bicycle to enter a dark environment or a dark environment, the photosensitive sensor transmits detection data to the main control module, and the main control module controls the tail lamp to light up, so that a rear vehicle is more obviously warned;
when a driver drives the electric bicycle to emergently brake, the whole electric bicycle and the driver can obtain an acceleration opposite to the driving direction, the acceleration sensor transmits a numerical value to the main control module, the main control module controls the tail lamp to light up, and if the tail lamp is already lighted up because of the photosensitive sensor at the moment, the main control module controls the tail lamp to strengthen the brightness of the tail lamp or controls the tail lamp to continuously flash;
when the driver drives the electric bicycle to rotate at the front of a turn, the driver preferentially looks at the direction to be turned and then looks at the other direction, the angle of the turning direction is larger than that of the non-turning direction, and at the moment, the main control module receives the numerical value transmitted by the second angle sensor and controls the left or right turning indicator lamp to light and flash. If the steering indicator lamp cannot be started by steering the head of the driver, whether the left steering indicator lamp or the right steering indicator lamp needs to be lightened is judged through the steering angle of the wheels collected by the first angle sensor, and the first angle sensor controls the left steering indicator lamp or the right steering indicator lamp to be lightened to flicker when detecting that the steering angle of the wheels exceeds a preset left steering interval or a preset right steering interval. When the steering indicating lamp is turned on, the first angle sensor on the electric bicycle can only be used for determining when to cancel the turning on and flashing of the steering indicating lamp, and the turning on and flashing of the steering indicating lamp is canceled after the first angle sensor detects that the turning angle of the wheels is within a preset left-right turning interval for 2.5 seconds.
When a driver drives the electric bicycle and an accident occurs, the tail lamp and the steering indicator lamp are simultaneously lighted and twinkle by pressing a button in front of the helmet.
After riding: when the driver stops the electric bicycle, the acceleration detector detects that the electric bicycle is decelerated to zero and does not change, and the first angle sensor does not change, the driver takes off the helmet, and the complete driving of the helmet is completed.
The foregoing is illustrative of only specific embodiments of this invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (10)
1. An intelligent safety helmet for an electric bicycle is characterized by comprising a helmet body (1), a sensor group, an LED lamp group, a storage battery (4), a button (5), a buzzer (6), a flexible solar panel (7) and a main control module (8), wherein the LED lamp group, the storage battery (4), the button (5), the buzzer (6), the flexible solar panel and the main control module are arranged on the helmet body;
the helmet body comprises a helmet outer shell (101), a sponge inner lining body (102) and an elastic hat buckle (103); the sponge inner lining body (102) is positioned inside the helmet shell (101), and a groove for installing the sensor group and the main control module is formed in the sponge inner lining body (102); two ends of the elastic hat band buckle (103) are arranged at two sides of the bottom of the helmet shell; the flexible solar panel (7) covers the helmet shell and is connected with the charging end of the storage battery;
the sensor group comprises a pressure sensor (201), a tension sensor (202), a first angle sensor, a second angle sensor, a photosensitive sensor (204) and an acceleration sensor (205); the pressure sensors are uniformly distributed on the sponge inner lining body in four directions, namely front, back, left and right directions, and each pressure sensor is provided with an elastic component; the first angle sensor is pasted at the head of the electric bicycle, and the second angle sensor and the acceleration sensor are arranged in the middle of the sponge inner lining body; the tension sensor is arranged on the elastic hat band buckle, and the photosensitive sensor is fixed on the rear side of the helmet shell;
the LED lamp set is arranged in the middle of the rear side of the helmet shell and consists of a left steering indicator lamp (301), a right steering indicator lamp (302), a middle tail lamp (302) and a bottom reflecting strip (303);
the storage battery is arranged at the rear lower part of the helmet body, and the buzzer (6) and the button (5) are respectively fixed at the two sides of the helmet body; the sensor group, the LED lamp group, the button, the buzzer and the main control module are all powered by a storage battery, and the sensor group, the LED lamp group, the button and the buzzer are all connected with the main control module.
2. The intelligent safety helmet of claim 1, wherein the buzzer comprises an audio unit and a vibration unit, different types of alarm sounds are stored in the audio unit, and the vibration unit is automatically turned on when the audio unit is operated.
3. The intelligent safety helmet of claim 1, wherein the main control module is integrated with a wireless receiver, and the wireless receiver is in wireless communication with the first angle sensor.
4. The intelligent safety helmet of electric bicycle according to claim 1, wherein the elastic cap buckle is movably provided with a jaw guard (110), and the jaw guard is made of any one of rubber, plastic and fabric.
5. The intelligent safety helmet of electric bicycle according to claim 1, wherein a rain-proof layer is adhered to an outer surface of the LED lamp set.
6. The intelligent safety helmet of claim 1, wherein the elastic member comprises a spring (104) and a sponge contact (105), one end of the spring is connected with the pressure sensor, and the other end of the spring is connected with the sponge contact.
7. The intelligent safety helmet of claim 1, wherein the helmet shell is provided with a first slot for mounting a buzzer and a second slot for mounting a battery.
8. The intelligent safety helmet of claim 7, wherein the first slot is provided with a baffle with air holes, and the second slot is provided with a sealing baffle.
9. The intelligent safety helmet of claim 1, wherein the helmet body is provided with a detachable transparent rain-proof mirror (109), and the external dimension of the rain-proof mirror is matched with the external dimension of the notch on the helmet shell.
10. The intelligent safety helmet of electric bicycle according to claim 1, further comprising a communication module connected to the main control module, wherein the communication module is capable of communicating with a mobile terminal of a user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776227.9U CN213756864U (en) | 2020-11-26 | 2020-11-26 | Intelligent safety helmet of electric bicycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776227.9U CN213756864U (en) | 2020-11-26 | 2020-11-26 | Intelligent safety helmet of electric bicycle |
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| CN213756864U true CN213756864U (en) | 2021-07-23 |
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| CN202022776227.9U Active CN213756864U (en) | 2020-11-26 | 2020-11-26 | Intelligent safety helmet of electric bicycle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729343A (en) * | 2021-09-29 | 2021-12-03 | 王泰明 | Electric bicycle helmet wearing detection device and detection method |
| CN114587045A (en) * | 2022-01-28 | 2022-06-07 | 东北大学 | Multifunctional riding helmet |
| CN115047626A (en) * | 2022-06-15 | 2022-09-13 | 北京释限创新科技有限公司 | AR intelligence helmet |
-
2020
- 2020-11-26 CN CN202022776227.9U patent/CN213756864U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729343A (en) * | 2021-09-29 | 2021-12-03 | 王泰明 | Electric bicycle helmet wearing detection device and detection method |
| CN114587045A (en) * | 2022-01-28 | 2022-06-07 | 东北大学 | Multifunctional riding helmet |
| CN114587045B (en) * | 2022-01-28 | 2023-05-12 | 东北大学 | Multifunctional riding helmet |
| CN115047626A (en) * | 2022-06-15 | 2022-09-13 | 北京释限创新科技有限公司 | AR intelligence helmet |
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