阅读说明：本技术 一种头盔跌落撞击检测方法及装置 (Helmet falling impact detection method and device ) 是由 秦婷 万海峰 陶维俊 姚莉莉 郑浩 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种头盔跌落撞击检测方法及装置,应用于包括重力加速度传感器的头盔,所述方法包括：通过所述重力加速度传感器实时检测所述头盔的加速度值；所述重力加速度传感器连续检测到所述头盔的加速度值小于或等于预设重力加速度阈值时确定所述头盔为自由落体运动,并检测得到所述头盔自由落体运动的时间；通过所述头盔自由落体运动的时间得到所述头盔自由落体运动的高度值,所述头盔自由落体运动的高度值大于或等于预设高度阈值时,确定发生跌落事件；检测所述头盔跌落撞击时的撞击值,本发明有效的保护了高空及井下作业者的人身安全,为头盔佩戴者争取营救的时间,减少严重事故的发生。(The invention discloses a helmet falling impact detection method and a device, which are applied to a helmet comprising a gravity acceleration sensor, wherein the method comprises the following steps: detecting an acceleration value of the helmet in real time through the gravity acceleration sensor; when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet; obtaining the height value of the free falling body movement of the helmet according to the free falling body movement time of the helmet, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to a preset height threshold value; the invention effectively protects the personal safety of high-altitude and underground operators, strives for rescue time for helmet wearers and reduces the occurrence of serious accidents.)

1. A helmet fall impact detection method, applied to a helmet comprising a gravitational acceleration sensor, the method comprising:

detecting an acceleration value of the helmet in real time through the gravity acceleration sensor;

when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

obtaining the height value of the free falling body movement of the helmet according to the free falling body movement time of the helmet, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to a preset height threshold value;

and detecting an impact value when the helmet falls and collides, and determining that a falling impact event occurs when the impact value when the helmet falls and collides is greater than or equal to a preset impact threshold value.

2. The helmet fall impact detection method according to claim 1, wherein the gravity acceleration sensor comprises an X-axis gravity acceleration sensor, a Y-axis gravity acceleration sensor, and a Z-axis gravity acceleration sensor.

3. The method for detecting falling impact of a helmet according to claim 2, wherein the real-time detection of the acceleration value of the helmet by the gravitational acceleration sensor specifically comprises:

and detecting the acceleration value of the helmet in real time through the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor.

4. The method according to claim 3, wherein the determining that the helmet is in free-fall motion when the acceleration value of the helmet continuously detected by the gravitational acceleration sensor is less than or equal to a preset gravitational acceleration threshold is specifically:

and when the acceleration values of the helmet continuously detected by the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor are all smaller than or equal to a preset gravity acceleration threshold value, the helmet is determined to move in a free falling body.

5. The method for detecting falling impact of a helmet as claimed in claim 1, wherein the obtaining of the height value of the free-fall movement of the helmet through the time of the free-fall movement of the helmet is specifically:

and judging the height value of the free falling movement of the helmet according to a free falling formula.

6. A helmet fall impact detection method according to claim 1, wherein before detecting the acceleration value of the helmet in real time by the gravitational acceleration sensor, the method further comprises:

detecting a distance value between the helmet and the wearing part in real time through a distance sensor;

when the distance sensor continuously detects that the distance value between the helmet and the wearing part is smaller than or equal to a preset distance threshold value, the helmet is determined to be worn.

7. A helmet fall impact detection device for use with a helmet comprising a gravitational acceleration sensor, the device comprising:

a detection module: detecting an acceleration value of the helmet in real time through the gravity acceleration sensor;

a time detection module: when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

a fall determination module: obtaining the height value of the free falling body movement of the helmet according to the free falling body movement time of the helmet, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to a preset height threshold value;

an impact determination module: and detecting an impact value when the helmet falls and collides, and determining that a falling impact event occurs when the impact value when the helmet falls and collides is greater than or equal to a preset impact threshold value.

Technical Field

The invention relates to the technical field of helmet protection equipment, in particular to a helmet falling impact detection method and device.

Background

In the process of high-altitude or underground operation, a plurality of unsafe factors exist, the accident that falling is inevitable can be encountered, certain threat can be caused to life, and based on the unsafe factors, more protective equipment is needed to be provided for the workers, so that certain protection effect can be realized on the work safety of the workers.

However, the existing helmet only simply protects the head of an operator on a physical layer, when the worker falls off in the process of high-altitude or underground operation, the purpose of rescuing the impactor can be achieved only by transmitting the information of the falling impact event among the workers, and the method can not realize accurate transmission of the information of the falling impact event of the worker, so that the impactor cannot be rescued in time.

Disclosure of Invention

The invention aims to provide a helmet falling impact detection method and a helmet falling impact detection device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a helmet fall impact detection method for use with a helmet comprising a gravitational acceleration sensor, the method comprising:

detecting an acceleration value of the helmet in real time through the gravity acceleration sensor;

when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

obtaining the height value of the free falling body movement of the helmet according to the free falling body movement time of the helmet, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to a preset height threshold value;

and detecting an impact value when the helmet falls and collides, and determining that a falling impact event occurs when the impact value when the helmet falls and collides is greater than or equal to a preset impact threshold value.

As a further scheme of the invention: the gravity acceleration sensor comprises an X-axis gravity acceleration sensor, a Y-axis gravity acceleration sensor and a Z-axis gravity acceleration sensor.

As a further scheme of the invention: the real-time detection of the acceleration value of the helmet through the gravity acceleration sensor specifically comprises the following steps:

and detecting the acceleration value of the helmet in real time through the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor.

As a further scheme of the invention: when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, the helmet is determined to be in free-fall motion, specifically:

and when the acceleration values of the helmet continuously detected by the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor are all smaller than or equal to a preset gravity acceleration threshold value, the helmet is determined to move in a free falling body.

As a further scheme of the invention: the height value of the free-fall movement of the helmet obtained by the time of the free-fall movement of the helmet is specifically as follows:

and judging the height value of the free falling movement of the helmet according to a free falling formula.

As a further scheme of the invention: before the detecting the acceleration value of the helmet in real time by the gravitational acceleration sensor, the method further comprises:

detecting a distance value between the helmet and the wearing part in real time through a distance sensor;

when the distance sensor continuously detects that the distance value between the helmet and the wearing part is smaller than or equal to a preset distance threshold value, the helmet is determined to be worn.

A helmet fall impact detection apparatus for use with a helmet comprising a gravitational acceleration sensor, the apparatus comprising:

a detection module: detecting an acceleration value of the helmet in real time through the gravity acceleration sensor;

a time detection module: when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

a fall determination module: obtaining the height value of the free falling body movement of the helmet according to the free falling body movement time of the helmet, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to a preset height threshold value;

an impact determination module: and detecting an impact value when the helmet falls and collides, and determining that a falling impact event occurs when the impact value when the helmet falls and collides is greater than or equal to a preset impact threshold value.

Compared with the prior art, the invention has the beneficial effects that:

the intelligent helmet wearing system judges whether the helmet is worn or not through the distance sensor, and monitors the state of an intelligent helmet wearer in real time through the gravity sensor; when the acceleration value of the helmet is continuously detected to be smaller than or equal to a preset gravity acceleration threshold value through a gravity acceleration sensor, the helmet is determined to move in a free falling body; obtaining the height value of the free falling movement of the helmet according to the free falling movement time of the helmet, and determining that a falling event occurs when the height value of the free falling movement of the helmet is greater than or equal to a preset height threshold value; detecting an impact value when the helmet falls and impacts, and determining that a falling impact event occurs when the impact value when the helmet falls and impacts is greater than or equal to a preset impact threshold value; based on traditional safety helmet, this design can be outside the simple protection head on the basis of physics, can also be timely acquire whether the worker of wearing the helmet has taken place to fall the striking incident, the effectual personal safety who has protected high altitude and downhole operator strives for the time of rescue for the helmet wearer, reduces the emergence of serious accident.

Drawings

FIG. 1 is a schematic flow chart of a method for detecting falling impact of a helmet;

FIG. 2 is a schematic view of a helmet fall impact detection device;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, in an embodiment of the present invention, a method for detecting a falling impact of a helmet is applied to a helmet including a gravitational acceleration sensor, and the method includes:

before detecting the acceleration value of the helmet in real time through a gravity acceleration sensor, detecting the distance value between the helmet and a wearing part in real time through a distance sensor;

when the distance sensor continuously detects that the distance value between the helmet and the wearing part is smaller than or equal to a preset distance threshold value, the helmet is determined to be worn, the distance sensor detects whether an object is close to the preset distance threshold value or not to judge whether the helmet is worn, the distance sensor chip is generally placed at the top of the head of the intelligent helmet, when the helmet is not worn, the distance sensor detects that no shielding object exists in an effective distance, and the intelligent helmet is judged to be in an unworn state; after the helmet is normally worn, the distance sensor detects in the effective distance, has the head to be close to the sensor, judges that present intelligent helmet is the wearing state, and the distance sensor can detect whether intelligent helmet is worn through the mode of whether there is the object to be close to in the effective distance detection.

The preset distance threshold value can be adjusted, corresponding adaptation is performed according to the structure of the current helmet, for example, the effective distance can be adjusted to be about 5cm, when an object distance sensor is smaller than 5cm, the distance sensor can give a message to inform that object shielding exists, so that the helmet is judged to be worn, and certainly, in order to prevent artificial shielding, whether the helmet is worn or not can be judged through each angle of a plurality of distance sensors, and adjustment can be performed according to actual requirements; the helmet wearing detection method can effectively prevent the individual habit of an operator from not wearing the helmet, so that certain risks can be generated in the safety aspect, and meanwhile, the false touch falling event that the worker throws the helmet on hand under the condition that the worker does not wear the helmet can be effectively prevented by utilizing the wearing detection function.

Detecting the acceleration value of the helmet in real time through a gravity acceleration sensor;

when the acceleration value of the helmet is continuously detected by the gravity acceleration sensor to be smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

obtaining the height value of the free falling movement of the helmet according to the free falling movement time of the helmet, and determining that a falling event occurs when the height value of the free falling movement of the helmet is greater than or equal to a preset height threshold value;

the gravity acceleration sensor comprises an X-axis gravity acceleration sensor, a Y-axis gravity acceleration sensor and a Z-axis gravity acceleration sensor.

The acceleration value of the helmet detected in real time through the gravity acceleration sensor is specifically as follows:

the acceleration value of the helmet is detected in real time through an X-axis gravity acceleration sensor, a Y-axis gravity acceleration sensor and a Z-axis gravity acceleration sensor.

When the acceleration value of the helmet continuously detected by the gravity acceleration sensor is less than or equal to a preset gravity acceleration threshold value, the helmet is determined to be in free-fall motion, specifically:

when the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor continuously detect that acceleration values of the helmet are all smaller than or equal to a preset gravity acceleration threshold value, the helmet is determined to move in a free falling mode, the X-axis gravity acceleration sensor, the Y-axis gravity acceleration sensor and the Z-axis gravity acceleration sensor can judge the working state of a current intelligent helmet wearer through the acceleration values of X, Y, Z three axes on the helmet, when the intelligent helmet wearer is in a free falling state, the acceleration data of all directions are all smaller than or equal to the preset gravity acceleration threshold value, namely, the helmet wearer is in a falling state.

When the helmet is in free fall, the intelligent helmet wearer is in free fall motion, so whether the intelligent helmet wearer is in free fall motion can be detected through the gravity sensor.

On the premise of not considering the precision of an electronic device, the design principle of the acceleration sensor is that the acceleration values of X, Y, Z three axes on the helmet are all 0 during free-fall movement, and in an actual measurement environment, limited by factors such as measurement precision and environment, the three-axis data of the gravity sensor may have a certain error during free-fall, so that the acceleration values of X, Y, Z three axes are not 0, and the gravity sensor can also be detected as falling for preventing the situation, therefore, the preset gravity acceleration threshold value can be set to be a value close to 0, and the acceleration sensor can be configured specifically according to an actual test result, for example, the value is set to be a value within the range of 0-0.5. If the X, Y, Z three-axis acceleration values measured in real time are all smaller than the preset value, the intelligent helmet wearer can be considered to be in free-fall motion.

The height value of the free falling body movement of the helmet obtained by the time of the free falling body movement of the helmet is specifically as follows:

and judging the height value of the free falling movement of the helmet according to a free falling formula.

When the intelligent helmet is monitored to be in free-fall movement, recording the duration of the free-fall movement, calculating according to a free-fall formula, and calculating by using the free-fall formula

And calculating to obtain the height value of the free falling body movement of the helmet, comparing the height value of the free falling body movement of the helmet with a preset height threshold value, and determining that a falling event occurs when the height value of the free falling body movement of the helmet is greater than or equal to the preset height threshold value.

And detecting an impact value when the helmet falls and impacts, and determining that a falling impact event occurs when the impact value when the helmet falls and impacts is greater than or equal to a preset impact threshold value.

When a helmet wearer is weightless and continues for a period of time, after the helmet wearer falls to a certain height, a certain impact condition exists, the impact threshold value can be an action force value through a preset impact threshold value, whether an impact event occurs can be judged, the impact can be judged according to specific requirements and specific use scenes, if the intelligent helmet wearer jumps down from a certain height, a soft bag or a corresponding impact-proof object is arranged at the bottom of the intelligent helmet wearer, the impact threshold value cannot be reached, the event can be judged to be a non-falling impact event, and a corresponding gravity falling threshold value can be configured according to actual test impact data.

A helmet fall impact detection device for use with a helmet including a gravitational acceleration sensor, the device comprising:

a detection module: detecting the acceleration value of the helmet in real time through a gravity acceleration sensor;

a time detection module: when the acceleration value of the helmet is continuously detected by the gravity acceleration sensor to be smaller than or equal to a preset gravity acceleration threshold value, determining that the helmet moves in a free falling body, and detecting to obtain the time of the free falling body movement of the helmet;

a fall determination module: obtaining the height value of the free falling movement of the helmet according to the free falling movement time of the helmet, and determining that a falling event occurs when the height value of the free falling movement of the helmet is greater than or equal to a preset height threshold value;

an impact determination module: and detecting an impact value when the helmet falls and impacts, and determining that a falling impact event occurs when the impact value when the helmet falls and impacts is greater than or equal to a preset impact threshold value.

When the helmet is used, the distance value between the helmet and the head of a wearer is detected in real time through the distance sensor, when the distance sensor continuously detects that the distance value between the helmet and the head of the wearer is smaller than or equal to a preset distance threshold value, the helmet is worn on the head of the wearer, and otherwise, the helmet is worn on the head of the wearer.

The acceleration value of the helmet is detected in real time through the gravity acceleration sensor, when the acceleration value of the helmet continuously detected by the gravity acceleration sensor is smaller than or equal to a preset gravity acceleration threshold value, the helmet wearer is in free-falling body movement, and otherwise, the helmet wearer is not in free-falling body movement.

Detecting the free falling movement time of the helmet, obtaining the height value of the free falling movement of the helmet through a free falling calculation formula, determining that a falling event occurs when the height value of the free falling movement of the helmet is greater than or equal to a preset height threshold value, otherwise, indicating that the falling event does not occur.

When the impact value of the helmet in the falling impact is larger than or equal to the preset impact threshold value, the helmet wearing person is judged to have a falling impact event, otherwise, the helmet wearing person is judged not to have the falling impact event.

After the falling impact event described above occurs, an alarm event that the helmet wearer falls is sent to the platform back-end server through the 2G, 3G, 4G, 5G, the cellular data network, the portable hotspot and the wireless network, the message is pushed to the system APP, and the system APP sends the falling impact event and the position information of the intelligent helmet wearer to the platform back-end server in an alarm manner.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.