CN210625675U

CN210625675U - Mine personnel safety positioning device based on MEMS technology

Info

Publication number: CN210625675U
Application number: CN201921822540.2U
Authority: CN
Inventors: 赵坤旭; 张琦; 陈映燃; 唐玉红; 付振华; 宫可; 付一帆; 封慧娴; 刘迪; 安健涛
Original assignee: Hebei University of Technology
Current assignee: Hebei University of Technology
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-05-26
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses a mine personnel safety positioner based on MEMS technique, include: a carrier; the MEMS positioning component comprises a circuit board, a microprocessor, an MEMS acceleration sensor and an LORA wireless data transmission module, wherein the circuit board is fixedly arranged on the carrier, and the microprocessor, the MEMS acceleration sensor and the LORA wireless data transmission module are all arranged on the circuit board and are electrically connected in the same circuit; and the storage battery is fixedly arranged on the carrier, and a discharge end lead-out wire of the storage battery is connected to a power supply port formed in the circuit board. The technical scheme can meet the premise of high maneuverability, no limitation is caused to the field, fewer base stations are used, the influence of network signals is avoided, the display is accurate, the operation is simple, professional training is not needed, the adopted inertial navigation technology enables data not to be influenced by the external environment but only related to the motion posture of a user, and the influence of different environments on navigation is avoided.

Description

Mine personnel safety positioning device based on MEMS technology

Technical Field

The utility model relates to an inertial navigation equipment technical field especially relates to a mine personnel safety positioner based on MEMS technique.

Background

In the modern information society, accurate and effective information application and acquisition need to be carried out around a positioning function, and people rely on positioning more and more. Outdoor, satellite positioning systems such as GPS can well meet the requirements of people. However, technologies such as RFID, Wi-Fi, bluetooth, ZigBee and the like that rely on networks and base stations can only work normally when the network is unobstructed, the environment is good, and the reception distance is short. Under severe conditions, such as underground mine, the position and the motion track of workers cannot be accurately mastered, so that the distribution of the workers in the underground mine is difficult to manage, and once mine disaster occurs, the trapped personnel are difficult to rescue in time. Due to the particularity and randomness of the mine disaster site situation, the carried positioning device has to be small and flexible, the positioning is accurate and timely, the dependence on a base station is small, and the situation is difficult to completely meet in the prior art.

At present, mine positioning products in the market often utilize an RFID technology, wherein the RFID technology is an automatic identification technology, and can identify a specific target through a wireless signal and read and write related data. Firstly, an RFID reader-writer transmits a radio frequency signal to a certain range, and when an RFID label enters a radio frequency field of the reader-writer, a label antenna obtains induced current so as to provide energy for an RFID chip; then, the chip sends the information stored in the chip to the reader-writer in the form of radio frequency signals through the built-in antenna, and the reader-writer demodulates and decodes the received signals; finally, the data is sent to a computer system in a wired or wireless mode for relevant data processing, and the position of the label is further obtained through a corresponding algorithm. At present, the frequencies used by mine personnel positioning radio frequency cards developed by various manufacturers in China are mainly concentrated on two frequency points of 433MHz and 2.4GHz, and the defects of weak penetration capability and large number of base stations are existed.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, a mine personnel safety positioning device based on the MEMS technology is provided, which aims to use fewer base stations, is not influenced by network signals and has accurate display, and the technical defects are overcome.

The specific technical scheme is as follows:

a mine personnel safety positioning device based on MEMS technology comprises:

a carrier;

the MEMS positioning component comprises a circuit board, a microprocessor, an MEMS acceleration sensor and an LORA wireless data transmission module, wherein the circuit board is fixedly arranged on the carrier, and the microprocessor, the MEMS acceleration sensor and the LORA wireless data transmission module are all arranged on the circuit board and are electrically connected in the same circuit;

and the storage battery is fixedly arranged on the carrier, and a discharge end lead-out wire of the storage battery is connected to a power supply port formed in the circuit board.

Preferably, the MEMS positioning component further includes a MEMS mechanical gyroscope disposed on the circuit board, and the inertial navigation system is formed by the MEMS acceleration sensor and the MEMS mechanical gyroscope.

Preferably, the device further comprises at least one warp knitted tape connected to the carrier.

Preferably, the number of the warp knitting belts is two, the two warp knitting belts are symmetrically connected to the left side and the right side of the carrier, one end of one warp knitting belt, which is far away from the carrier, is connected with the quick insertion hole, and one end of the other warp knitting belt, which is far away from the carrier, is connected with the quick insertion joint used for being inserted into the quick insertion hole.

Preferably, the carrier is an acrylic plate having a rectangular shape as a whole.

Preferably, the microprocessor is mounted on the circuit board in a welding mode, and the LORA wireless data transmission module, the MEMS acceleration sensor and the MEMS mechanical gyroscope are connected with the circuit board through pins respectively.

Preferably, two sets of fixing nuts are arranged around the circuit board, and two sets of screws corresponding to the fixing nuts are connected to the carrier.

Preferably, the circuit board is electrically connected with an indicator light.

The beneficial effects of the above technical scheme are that:

mine personnel safety positioning device based on MEMS technique includes the carrier, MEMS locating component, the battery, and MEMS locating component includes the circuit board, a microprocessor, MEMS acceleration sensor, the wireless data transmission module of LORA, make can be satisfying under the prerequisite that mobility is high, there is not any restriction to the place, use less base station, do not receive the influence of network signal, it is accurate to show, and easy operation, need not professional training, the inertial navigation technique of adoption makes data not receive external environment's influence and only is relevant with user's motion gesture, the influence of different environment to navigation has been avoided.

Drawings

Fig. 1 is a schematic structural diagram of the mine personnel safety positioning device based on the MEMS technology;

fig. 2 is the utility model discloses in mine personnel safety positioner based on MEMS technique the hardware connection schematic diagram.

Detailed Description

In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the following embodiments are specifically illustrated in conjunction with fig. 1 and fig. 2.

Referring to fig. 1 and 2, the utility model provides a mine personnel safety positioning device based on MEMS technique includes:

a carrier 6;

the MEMS positioning component comprises a circuit board 8, a microprocessor 9, an MEMS acceleration sensor 3 and an LORA wireless data transmission module 2, wherein the circuit board 8 is fixedly arranged on the carrier 6, and the microprocessor 9, the MEMS acceleration sensor 3 and the LORA wireless data transmission module 2 are all arranged on the circuit board 8 and are electrically connected in the same circuit;

and the storage battery 5 is fixedly arranged on the carrier 6, and a discharge end lead-out wire 4 of the storage battery 5 is connected to a power supply port 10 formed in the circuit board 8.

In a preferred embodiment, the MEMS positioning component further comprises a MEMS mechanical gyroscope 13 disposed on the circuit board 8, and the inertial navigation system is formed by the MEMS acceleration sensor 3 and the MEMS mechanical gyroscope 13. The advantage of the MEMS acceleration sensor 3 is that it measures the acceleration of each step of the person's movement and determines the trajectory of the user's movement by calculating the step size by double integration of the acceleration, i.e. the inertial navigation system calculates the position of the next point from the position of a known point based on the continuously measured heading angle and speed of the vehicle. Thus, the current position of the moving body can be continuously measured. The MEMS mechanical gyroscope 13 in the inertial navigation system is used for forming a navigation coordinate system to enable the measuring axis of the MEMS acceleration sensor 3 to be stabilized in the coordinate system and give course and attitude angles; the acceleration sensor 3 is used for measuring the acceleration of the moving body, the speed is obtained through one time of integration of time, and the distance can be obtained through one time of integration of the speed. Because the system is an autonomous system which does not depend on any external information and does not radiate energy to the outside, the system has good concealment and is not influenced by external electromagnetic interference; meanwhile, the LORA wireless data module is used for transmission, the transmission distance is long, and the penetration capability is stronger compared with the same type of transmission mode.

As a further preferred embodiment, the MEMS technology based mine personnel safety positioning device further comprises at least one warp knitted band 7 attached to the carrier 6 for attaching the device to the chest of a user. Further, the number of the warp knitting belts 7 is two, the two warp knitting belts 7 are symmetrically connected to the left side and the right side of the carrier 6, one end, away from the carrier 6, of one of the warp knitting belts 7 is connected with the quick plug hole 1, and one end, away from the carrier 6, of the other warp knitting belt 7 is connected with the quick plug connector used for being plugged with the quick plug hole 1. So as to be connected into a whole, which is the conventional connection structure, and thus the detailed description is omitted here. Further, the carrier 6 is an acrylic plate which is rectangular as a whole and is used for protecting the MEMS positioning component, the weight and the length are improved, the carrier is bound on a human body, the walking of a user is not affected, the burden on the weight of the user is not increased, and the warp knitted belts 7 connected with the left side and the right side enable the carrier to be worn in front of the chest of the user. Further, the microprocessor 9 is of the model STM32f10 x. Further, the capacity of the battery 5 is 2600mA, which can be adjusted according to actual needs.

In a further preferred embodiment, the microprocessor 9 is mounted on the circuit board 8 by soldering, and the LORA wireless data transmission module 2, the MEMS acceleration sensor 3, and the MEMS mechanical gyroscope 13 are connected to the circuit board 8 through pins, respectively, and are connected to the microprocessor 9 in one circuit. Furthermore, two sets of fixing nuts are disposed around the circuit board 8, and two sets of screws 12 corresponding to the fixing nuts are connected to the carrier 6 for fixing the circuit board 8. Further, the circuit board 8 is electrically connected with an indicator light 11 for displaying the operation state of each electric device.

Obviously, in concrete application, this positioner only need corresponding establishment have less basic station, transmit user's positional information for rear platform through LORA wireless data transmission, carry out real-time supervision to the user, utilize inertial navigation appearance to obtain the step length that the user moved in each step through the analysis human motion acceleration simultaneously, these two improvements make this technique can use under urgent, the short-lived condition, do not receive external environment to disturb, the location is accurate, guarantee fire fighter's life safety that can furthest. In addition, the position of the user in the upper computer system is represented by the situation of a 2D picture, and a rear monitor can more intuitively obtain the position of the user, so that a further instruction is sent to the user. And the moving acceleration and the angular velocity of the user in the moving process are transmitted to a microprocessor 9 in the device in a digital quantity mode through a sensor on the device, the microprocessor 9 calculates and analyzes data to obtain the moving distance and the moving direction of the user, the moving distance and the moving direction are transmitted to an upper computer system at the other end through a wireless serial port, and the moving acceleration and the moving angular velocity are visually displayed on upper computer software in a picture mode.

Based on above-mentioned technical scheme, mine personnel safety positioner based on MEMS technique includes carrier 6, MEMS locating component, battery 5, and MEMS locating component includes circuit board 8, microprocessor 9, MEMS acceleration sensor 3, LORA wireless data transmission module 2, make can satisfy under the prerequisite that mobility is high, there is not any restriction to the place, use less basic station, do not receive network signal's influence, it is accurate to show, and easy operation, professional training is not needed, the inertial navigation technique of adoption makes data not receive external environment's influence and only is relevant with user's motion gesture, the influence of different environment to the navigation has been avoided.

The foregoing is only a preferred embodiment of the present invention, which is illustrative, not limiting. Those skilled in the art will appreciate that many variations, modifications, and equivalents may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A mine personnel safety positioning device based on MEMS technology, characterized by comprising:

a carrier (6);

the MEMS positioning component comprises a circuit board (8), a microprocessor (9), an MEMS acceleration sensor (3) and an LORA wireless data transmission module (2), the circuit board (8) is fixedly arranged on the carrier (6), and the microprocessor (9), the MEMS acceleration sensor (3) and the LORA wireless data transmission module (2) are all arranged on the circuit board (8) and are electrically connected in the same circuit;

the storage battery (5) is fixedly arranged on the carrier (6), and a discharge end lead-out wire (4) of the storage battery (5) is connected to a power supply port (10) formed in the circuit board (8).

2. The MEMS technology based mine personnel safety positioning device of claim 1, characterized in that the MEMS positioning component further comprises a MEMS mechanical gyroscope (13) disposed on the circuit board (8), and an inertial navigation system is formed by the MEMS acceleration sensor (3) and the MEMS mechanical gyroscope (13).

3. Mine personnel safety positioning device based on MEMS technology according to claim 1 or 2, characterized by further comprising at least one warp-knitted tape (7) connected to the carrier (6).

4. The mine personnel safety positioning device based on MEMS technology as claimed in claim 3, characterized in that the number of the warp knitting tapes (7) is two, two warp knitting tapes (7) are symmetrically connected to the left and right sides of the carrier (6), one end of one warp knitting tape (7) departing from the carrier (6) is connected with a fast plug hole (1), and one end of the other warp knitting tape (7) departing from the carrier (6) is connected with a fast plug for plugging with the fast plug hole (1).

5. The MEMS-based mine personnel safety positioning device of claim 4, wherein the carrier (6) is an acrylic plate having a rectangular overall shape.

6. The mine personnel safety positioning device based on MEMS technology as claimed in claim 2, characterized in that the microprocessor (9) is mounted on the circuit board (8) by welding, and the LORA wireless data transmission module (2), the MEMS acceleration sensor (3) and the MEMS mechanical gyroscope (13) are respectively connected with the circuit board (8) by pins.

7. The mine personnel safety positioning device based on MEMS technology as claimed in claim 1, characterized in that two sets of fixing nuts are arranged around the circuit board (8), and two sets of screws (12) corresponding to the fixing nuts are connected to the carrier (6).

8. The mine personnel safety positioning device based on MEMS technology as claimed in claim 1, characterized in that an indicator light (11) is also electrically connected to the circuit board (8).