Low-power-consumption intelligent positioning safety helmet

Abstract

A low-power-consumption intelligent positioning safety helmet comprises a safety helmet body, a safety helmet main board is arranged on the safety helmet body, an MCU control module is arranged in the safety helmet main board, and the input end of the MCU control module is electrically connected with an accelerometer module and an ambient light sensing module. The output end of the MCU control module controls the satellite positioning module and the communication module to position the position of the safety helmet. A Beidou satellite positioning technology is adopted in an outdoor environment, a 4G base station positioning technology is adopted in an indoor environment, and multi-mode combined positioning and automatic switching can be realized. According to the intelligent safety helmet, a positioning mode is improved through a motion sensing circuit and an environment sensing circuit of the intelligent safety helmet, automatic power-on and power-off control over the Beidou positioning module and the 4G communication module is achieved, on-demand power supply of large-power-consumption units such as the positioning module is achieved, a power consumption management mechanism is optimized, power consumption of the whole helmet is reduced, and the endurance time is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower safety, in particular to a low-power consumption intelligent positioning safety helmet. Background Art

[0002] Hydropower and pumped storage, Yangtze River protection, regional integrated energy and other businesses have many operating areas, long lines, wide areas, complex personnel structure and working environment, which makes management and control extremely difficult. At present, most workers on the construction site of infrastructure projects use traditional helmets. These helmets can meet the basic requirements of personnel safety protection, but there is still a big gap with the urgent needs of the group company such as high-quality safety development and intelligent perception in the lean construction process.

[0003] In recent years, smart helmets, as a new type of smart wearable IoT device, have begun to be used in the engineering industry. Most of the existing smart helmets use GPS and Beidou satellite positioning technology to accurately measure the position of workers. However, these technologies require the positioning module (chip) to work continuously or for a long time. The high power consumption of the whole machine leads to frequent charging of smart helmets, which affects the continuous use of users. There is a type of smart helmet that achieves low power consumption by shutting down the positioning module at regular or irregular intervals, but this method will reduce the positioning accuracy and has poor real-time performance. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a low-power intelligent positioning helmet, which integrates modules such as video acquisition, audio acquisition, communication, positioning, one-button call for help, motion perception and environmental perception. The helmet has functions such as identity information authentication, personnel positioning, and dangerous source alarm. It is a highly integrated visual wearable Internet of Things device. In terms of positioning methods, it adopts Beidou satellite positioning technology in outdoor environments and 4G base station positioning technology in indoor environments, realizing multiple methods of joint positioning and automatic switching. The intelligent helmet improves the positioning mode through its own motion perception and environmental perception circuits, realizes automatic power on and off control of the Beidou positioning module and the 4G communication module, and realizes on-demand power supply of high-power units such as the positioning module, thereby optimizing the power consumption management mechanism, thereby reducing the power consumption of the entire machine and extending the battery life.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A low-power consumption intelligent positioning helmet comprises a helmet body, a helmet mainboard is arranged on the helmet body, an MCU control module is arranged in the helmet mainboard, an input end of the MCU control module is electrically connected with an accelerometer module and an ambient light sensor module, and an output end of the MCU control module controls a satellite positioning module and a communication module to locate the position of the helmet.

[0007] The output end of the MCU control module is electrically connected to the satellite positioning switch module. The satellite positioning switch module is provided with a satellite positioning module switch circuit, and the operation of the satellite positioning module is controlled by the satellite positioning module switch circuit.

[0008] The output end of the above-mentioned MCU control module is electrically connected to the communication module switch, and the communication module switch controls whether the communication module works or not.

[0009] The satellite positioning module is connected to the MCU control module for communication and sends the positioning data to the MCU control module.

[0010] The above-mentioned satellite positioning module adopts Beidou satellite positioning.

[0011] The above-mentioned communication module adopts 4G communication.

[0012] The above-mentioned helmet mainboard (2) is provided with a lithium battery module and a lithium battery charge and discharge management module. The lithium battery module provides power for the helmet mainboard, and the lithium battery charge and discharge management module manages the charge and discharge of the lithium battery module.

[0013] A video and audio acquisition module may also be provided in the above-mentioned helmet mainboard.

[0014] The utility model provides a low-power intelligent positioning helmet, which has the following beneficial effects:

[0015] 1. It is equipped with a dual-channel light sensing circuit to sense the intensity of visible light and infrared light respectively. If there are infrared spectrum components of visible light and sunlight at the same time, it is determined to be an outdoor environment. If no infrared spectrum components are detected, the Beidou positioning module is turned on to search for signals. According to the presence or absence of satellite signals searched by the Beidou satellite positioning module, it can be determined whether the helmet is currently in an outdoor or indoor environment. If it is an outdoor environment, Beidou satellite positioning is used; if it is an indoor environment, the power supply of the Beidou satellite positioning satellite positioning module is immediately turned off, and the base station signal search is performed through the 4G communication module instead. Rapid and accurate positioning is performed through indoor mobile base stations, reducing the energy consumption generated by the Beidou satellite positioning module's continuous search for satellite signals;

[0016] 2. Equipped with an accelerometer circuit, it can sense the movement of the smart helmet. When the smart helmet has obtained the current position and the movement amplitude is small and relatively static, the Beidou satellite positioning and 4G circuits are turned off to reduce the energy consumption generated by the positioning work of the two modules and the base station search;

[0017] Through the above two methods, the power consumption of the smart helmet can be effectively reduced and the battery life can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 This is the overall structure of the intelligent safety helmet of the utility model;

[0020] Figure 2 This is the mainboard diagram of the smart helmet;

[0021] Figure 3 is a schematic diagram of a photosensitive circuit;

[0022] Figure 4 is a schematic diagram of an accelerometer;

[0023] Figure 5 This is the connection diagram of Beidou satellite positioning module;

[0024] Figure 6 This is the schematic diagram of the Beidou satellite positioning module switch circuit;

[0025] Figure 7 This is the connection diagram of MCU control module;

[0026] Figure 8 This is a schematic diagram of the 4G communication module;

[0027] Fig. 9 This is a schematic diagram of the lithium battery charge and discharge management module;

[0028] Fig.10 Schematic diagram of the helmet positioning workflow.

[0029] In the figure: a safety helmet body 1, a safety helmet mainboard 2, an MCU control module 21, an accelerometer module 22, an ambient light sensor module 23, a satellite positioning switch module 24, a satellite positioning module 25, a communication module switch 26, a communication module 27, a lithium battery module 28, and a lithium battery charge and discharge management module 29. DETAILED DESCRIPTION

[0030] like Figure 1-10 As shown in the figure, a low-power intelligent positioning helmet includes a helmet body 1, a helmet mainboard 2 is provided on the helmet body 1, an MCU control module 21 is provided in the helmet mainboard 2, an input end of the MCU control module 21 is electrically connected to an accelerometer module 22 and an ambient light sensor module 23, and an output end of the MCU control module 21 controls a satellite positioning module 25 and a communication module 27 to locate the position of the helmet.

[0031] The output end of the MCU control module 21 is electrically connected to the satellite positioning switch module 24 . The satellite positioning switch module 24 is provided with a satellite positioning module switch circuit, and the operation of the satellite positioning module 25 is controlled by the satellite positioning module switch circuit.

[0032] The output end of the MCU control module 21 is electrically connected to the communication module switch 26 , and the communication module switch 26 controls whether the communication module 27 works or not.

[0033] The satellite positioning module 25 is connected to the MCU control module 21 for communication and sends the positioning data to the MCU control module 21 .

[0034] The satellite positioning module 25 mentioned above adopts Beidou satellite positioning.

[0035] The above-mentioned communication module 27 adopts 4G communication.

[0036] The above-mentioned helmet mainboard 2 is provided with a lithium battery module 28 and a lithium battery charge and discharge management module 29 . The lithium battery module 28 provides power for the helmet mainboard 2 , and the lithium battery charge and discharge management module 29 manages the charge and discharge of the lithium battery module 28 .

[0037] The above-mentioned helmet mainboard 2 may also be provided with a video and audio acquisition module.

[0038] Example:

[0039] The intelligent safety helmet of the utility model comprises a safety helmet body and an intelligent safety helmet mainboard.

[0040] The helmet body includes a helmet shell, a safety rope, a buffer pad, etc.

[0041] The main board of the helmet includes a lithium battery module, a lithium battery charge and discharge management module, an accelerometer module, an ambient light sensor module, an MCU control module, a Beidou satellite positioning switch module, a Beidou satellite positioning module, a 4G communication module switch and a 4G communication module, etc.

[0042] Light sensing module: The light sensing module consists of two light sensing circuits, which can sense the intensity of visible light and infrared light spectrum respectively; the structures of the two circuits are the same, such as Figure 3 As shown, D is a photoresistor. The difference is that in the visible light sensing circuit, D uses a photosensor that is sensitive to visible light, which converts the sensed visible light intensity into its own resistance change, while in the infrared light sensing circuit, D uses a photosensor for the infrared frequency band; different light intensities will cause the resistance value of D and the shared voltage to change, and cause the voltage on the output pin of the circuit to change. The output pins of the two channels are connected to the input pins of the MCU control module on the main control board respectively, so that the MCU can read the voltage status of the two circuits and realize the perception of light intensity.

[0043] Accelerometer: The accelerometer uses ADI's ADXL345 series three-axis acceleration sensor, which can simultaneously detect the acceleration and its changes in three mutually perpendicular directions of X, Y and Z; the accelerometer uses the IIC bus communication interface, and its SCL and SDA pins are connected to the IIC bus communication interface of the MCU control module processor; the MCU reads the acceleration size and its change pattern in the three directions of the accelerometer through the IIC bus, which can detect the intensity of the movement of users wearing safety helmets, and select a threshold value as the distinction between stillness and movement.

[0044] The utility model adopts Beidou satellite positioning module L70 for design, the module is connected to the single-chip microcomputer through R46 100 ohm resistor and R47 100 ohm resistor, and the communication mode is serial port; the module sends the received satellite information, position information and time information to the MCU end through the serial port for data processing; C32, R54, C33 form a π-type filter circuit to ensure stable transmission and reception of radio frequency signals; MCU controls NPN transistors Q6 and Q8 through GPIO, when the MCU end outputs a high level, that is, both ends of R43 and both ends of R51 are high levels, at this time, Q6 and Q8 transistors are turned on, the emitter and collector of the transistor are low levels, and the module enters RESET or STANDBY state.

[0045] The Beidou satellite positioning module switch circuit designed by the utility model uses PMOS P1 and NPN transistors to form a power switch circuit; when the MCU end outputs a high level, that is, both ends of R106 and R51 are high levels, at this time, the Q17 transistor is turned on, the emitter and collector of the transistor are low levels, at this time, the gate G of P1 is also low level, VGS is 3.6V, then P1 is turned on, the output of the drain D of P1 is 3.6V, at this time, the Beidou satellite positioning module is powered on and works normally, otherwise the Beidou satellite positioning is turned off.

[0046] The MCU control module uses STM32F105RBT6 as the ST main control, which mainly controls and interacts with Beidou satellite positioning, 4G and other peripherals through serial ports and GPIO.

[0047] The 4G module used is Youfang's N706 4G module. The 4G module is connected to the MCU through Pin28 and Pin29, and the positioning data processed by the MCU is uploaded to the platform server through the serial port.

[0048] The lithium battery charge and discharge management module uses TP4056, which integrates power transistors. The charging current can be set with an external resistor, and the continuous charging current can reach 1A. TP4056 pre-charges the battery with a small current. When the battery voltage exceeds 2.9V, the battery is charged in constant current mode, and the charging current is determined by the resistor RPROG between the PROG pin and GND. When the battery voltage approaches 4.2V, the charging current gradually decreases, and TP4056 enters the constant voltage charging mode. When the charging current decreases to the charging end threshold, the charging cycle ends, the CHRG terminal outputs a high impedance state, and the STDBY terminal outputs a low potential. The charging end threshold is 10% of the constant current charging current; when the battery voltage drops below the recharge threshold of 4.1V, TP4056 automatically starts a new charging cycle. Chip Pin6 and Pin7 are connected to the MCU.

[0049] The implementation method is as follows: After the smart helmet of the utility model is turned on, the lithium battery is powered on, and the two-way light intensity values ​​of the light sensing module are read first. If there is ambient visible light and the infrared spectrum component of sunlight at the same time, the Beidou satellite positioning power supply is turned on and positioning is performed. If no infrared spectrum component is detected, the Beidou positioning module is turned on to search for signals; based on the search results of the Beidou positioning satellite signal, if there is a positioning satellite signal, positioning is performed through Beidou satellite positioning; if there is no positioning satellite signal, the 4G module is turned on to connect to the base station, and the AT command (AT+CCED command) is sent to query the relevant information of the current base station connected to the module, and indoor positioning is performed through the nearest mobile operator base station.

[0050] Mobile operator base station positioning is a value-added service that obtains the location information (latitude and longitude coordinates) of terminal device users through the telecommunications mobile operator's network (such as 4G network) and provides users with corresponding services with the support of the electronic map platform. Mobile operator base station positioning technology uses the distance measured by the base station to the terminal device to determine the location of the terminal device. The accuracy depends largely on the distribution of the base station and the size of the coverage range.

[0051] In the implementation mode of this patent, since prior information of the environment is obtained in advance, such as the internal environment and construction drawings of linear spaces such as tunnels and dams, combined with the 4G base station location, indoor space map and other information pre-configured on the server, on the basis of mastering the distance information from the base station to the smart helmet terminal, the accurate location information of the smart helmet can be further calculated, greatly improving the positioning accuracy.

[0052] In addition, regardless of the above-mentioned Beidou satellite positioning or mobile operator base station positioning, when the smart helmet terminal has obtained accurate positioning results, the MCU control module on the helmet mainboard begins to periodically read the accelerometer count value and make motion behavior judgments based on the accelerometer count value; if the user wearing the helmet has not continued to move after the last successful positioning, the Beidou satellite positioning power supply and the 4G module power supply are turned off through the module's power switch. Otherwise, if continuous movement is detected and the time exceeds the set threshold Tmin, the ambient light detection step is re-entered to start the next positioning action. The size of the motion time threshold Tmin can be personalized according to the operation scenario.

[0053] Terminology explanation:

[0054] GPS: Global Positioning System, GPS, is a high-precision radio navigation positioning system based on artificial satellites.

[0055] Beidou: Beidou Navigation Satellite System, English name: BeiDou Navigation Satellite System, referred to as BDS, is a global satellite navigation system independently developed by China.

[0056] MCU: Microcontroller Unit; MCU, Single Chip Microcomputer or single chip microcomputer.

[0057] PMOS: refers to a MOS tube with n-type substrate and p-channel, which relies on the flow of holes to transport current.

[0058] NPN: refers to a transistor composed of two N-type semiconductors with a P-type semiconductor sandwiched between them.

[0059] It should be pointed out that the solution to the above-mentioned technical problem requires programming and the use of software, but the software is only a part of the technical solution of the utility model, and its means are all existing technologies. The key to solving the technical problem of the utility model is the positioning control structure, which is a new technology of shape, structure and combination thereof. Therefore, it cannot be judged that the content of this application does not belong to the protection object of the utility model on the grounds that software or program needs to be used.

Claims

1. A low-power intelligent positioning helmet, characterized in that: The invention comprises a safety helmet body (1), a safety helmet mainboard (2) being provided on the safety helmet body (1), an MCU control module (21) being provided in the safety helmet mainboard (2), an input end of the MCU control module (21) being electrically connected to an accelerometer module (22) and an ambient light sensor module (23), and an output end of the MCU control module (21) controlling a satellite positioning module (25) and a communication module (27) to locate the position of the safety helmet.

2. A low-power intelligent positioning helmet according to claim 1, characterized in that: The output end of the MCU control module (21) is electrically connected to the satellite positioning switch module (24), and a satellite positioning module switch circuit is provided in the satellite positioning switch module (24), and the operation of the satellite positioning module (25) is controlled by the satellite positioning module switch circuit.

3. A low-power intelligent positioning helmet according to claim 2, characterized in that: The output end of the MCU control module (21) is electrically connected to the communication module switch (26), and the communication module switch (26) controls whether the communication module (27) works or not.

4. A low-power intelligent positioning helmet according to claim 3, characterized in that: The satellite positioning module (25) is communicatively connected to the MCU control module (21) and sends positioning data to the MCU control module (21).

5. A low-power intelligent positioning helmet according to claim 4, characterized in that: The satellite positioning module (25) adopts Beidou satellite positioning.

6. A low-power intelligent positioning helmet according to claim 5, characterized in that: The communication module (27) adopts 4G communication.

7. A low-power intelligent positioning helmet according to claim 6, characterized in that: The helmet mainboard (2) is provided with a lithium battery module (28) and a lithium battery charge and discharge management module (29); the lithium battery module (28) provides power for the helmet mainboard (2), and the lithium battery charge and discharge management module (29) manages the charge and discharge of the lithium battery module (28).

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