CN102262219A - Wireless beacon device - Google Patents

Abstract

The wireless beacon device disclosed by the present invention belongs to the field of wireless communication technology. This wireless beacon device is provided with a microstrip antenna on each surface of the casing (or on the area divided into multiple equal parts by the cylindrical surface), and is connected by a microcomputer. The sensor-three-dimensional accelerometer of the device attitude obtains information, judges the landing attitude of the wireless beacon device, selects the microstrip antenna facing the sky as the signal transmitting antenna, improves the transmission efficiency, and the wireless beacon device of the present invention overcomes the existing wireless beacon The various deficiencies or shortcomings of the antenna in the device provide a new design concept. This technical solution can be widely used in wireless signal source signs indicating the position of various flying objects, memories, black boxes, etc. after landing. Significance.

Description

wireless beacon device

1. Technical field

The wireless beacon device disclosed by the present invention belongs to the technical field of wireless communication, and specifically relates to a method of judging the landing posture of the beacon device through a three-dimensional accelerometer, and selecting a non-ground microstrip antenna as a signal transmitting antenna.

2. Background technology

The main disadvantages of the antenna of the existing beacon device are: 1. After the beacon lands, the antenna has a large area facing the ground, so that the transmission efficiency of the antenna is greatly reduced, and even cannot work. 2. The whip antenna is easily damaged when the object hits the ground. Therefore, how to ensure that the antenna can work normally and efficiently after landing has become an urgent problem to be solved. The invention provides a beacon antenna design with a new concept. The method overcomes various deficiencies or shortcomings of the existing beacon antennas, and is of great significance for improving the search for important targets. The wireless beacon device designed in this way can be widely used in wireless signal source signs indicating positions after various flying objects, memories, black boxes, etc. land on the ground.

3. Contents of the invention

The purpose of the present invention is to provide the society with the technical solution of this wireless beacon device, which can improve the impact resistance and transmission efficiency of the transmitting antenna, and facilitate the search personnel to find the target. The wireless beacon device can be used for wireless beacon devices such as flying objects, memories, and black boxes that need to be found and recovered afterwards.

The technical solution of the present invention is as follows: this wireless beacon device is composed of a shell or a housing and a microcomputer inside it, an electronic circuit controlled by it, a power supply, etc., and the technical features are: the wireless beacon device The microcomputer is connected with a three-dimensional accelerometer, which is a sensor of device attitude, and also connected with n analog switches, and also connected with a wireless transmitting module, wherein each analog switch of the n analog switches is respectively connected and arranged on n wireless beacon device housings. The microstrip antenna on one of the surfaces, the wireless transmitting module is connected to each analog switch of n analog switches and is respectively connected to the microstrip antenna arranged on one of the n surfaces of the wireless beacon device casing, and the n is selected An integer between 4 and 10. The microcomputer and its software of the wireless beacon device obtain information through the three-dimensional accelerometer as a device attitude sensor, and control the multi-channel analog switch according to the device attitude information to select and close the non-ground microstrip antenna to work, so that the wireless transmitting module Wireless beacon information is transmitted via a microstrip antenna that is not facing the ground. Described three-dimensional accelerometer includes: integrated MEMS three-dimensional accelerometer such as the MMA845nQ series (n=1,2,3,4) of freescale company, MMA7260, the HAAM-301A of Japan Hokuriku Electric Industry Co., Ltd., the KXP84 of Kionix company , BOSCH's SMB363, etc., they are 3-axis digital low-g acceleration sensors integrated in a single chip using MEMS technology, and the communication interface adopts SPI or I ² C form. The working process of the wireless beacon device is as follows: after power-on, the microcomputer enters initialization, and the configured three-dimensional accelerometer sensor, circuit, etc. enter a low power consumption state. In this state, the wireless beacon device flies together with the flying objects, and the flying objects include missiles, airplanes, aircraft, rockets, missiles, satellites and other flying objects. When the wireless beacon device receives the startup command, the circuit returns to the normal working state, the three-dimensional accelerometer sensor is turned on, and the attitude of the wireless beacon device is judged by calculating the value of the three-dimensional acceleration. The non-ground microstrip antenna is closed by a series of analog switches controlled by a microcomputer. Turn on the wireless transmitting module to send wireless information through the non-ground microstrip antenna.

According to the wireless beacon device described above, the technical features also include: the microstrip antenna of the wireless beacon device adopts a multi-channel independent micro-strip structure and is controlled by multiple independent analog switches to start, run, work, etc. . The antenna of the microstrip structure is fixed on the surface of the device. When the wireless beacon device is a cylinder, a microstrip antenna is fixed or arranged on the area divided into 4 to 6 equal parts on the cylindrical surface, so that the wireless beacon device falls on the surface of the device. When on the ground, at least one side is not facing the ground, or one side is facing the sky. The microstrip antenna is made of copper clad laminate, which can withstand the large impact acceleration when the wireless beacon device lands without damage. It is more reasonable to fix a microstrip antenna on the area divided into 4 to 6 equal parts on the cylindrical surface. Of course, a larger or smaller number can be selected, such as 3, or 7, or 8 equal parts. Using the microcomputer to obtain the static output of the three-dimensional accelerometer, the attitude of the wireless beacon device can be determined, so that the analog switch can be used to cut off the transmitting antenna facing the ground from transmitting radio waves, thereby improving the transmitting efficiency of the beacon antenna.

According to the wireless beacon device described above, the technical features also include: when the wireless beacon device is a cuboid or a cube, a microstrip antenna is respectively fixed or arranged on each surface, so that the wireless beacon device falls on the When on the ground, at least one side is not facing the ground, or one side is facing the sky. This design choice is also more reasonable.

The advantages of the wireless beacon device of the present invention are as follows: 1. The microcomputer of this wireless beacon device judges the landing posture of the wireless beacon device through a three-dimensional accelerometer, and selects to use the microstrip antenna facing the sky as the signal transmitting antenna, thereby improving the accuracy of the beacon antenna. 2. The microstrip antenna of this wireless beacon device adopts a multi-channel independent microstrip structure with several sides separately arranged. The microstrip antenna adopts the copper clad laminate manufacturing process, which can withstand the large The impact acceleration is not damaged, and when the wireless beacon device falls on the ground, at least one side is not facing the ground, or one side is facing the sky, transmitting wireless beacon signals; 3. This wireless beacon device provides a new The design concept of this design method overcomes the various deficiencies or shortcomings of the antennas in the existing wireless beacon devices, and is of great significance for improving the search for important targets; 4. The wireless beacon devices designed according to this method can be widely used It is worth adopting and popularizing the wireless signal source sign that indicates the location of various flying objects, memory, black boxes, etc. after landing.

4. Description of drawings

There are 4 drawings in the description of the present invention:

Fig. 1 is a structural block diagram of a wireless beacon device;

Fig. 2 is a cube shape structure diagram of a wireless beacon device;

Fig. 3 is a cylindrical external structure diagram of the wireless beacon device;

Fig. 4 microcomputer (single-chip microcomputer) flowchart;

A unified reference number is used in each figure, that is, the same object uses the same reference number in each figure. In each figure: 1. battery; 2. wireless transmitting module; 3. multi-channel analog switch; 4. microstrip antenna 1; 5. microstrip antenna 2; 6. microstrip antenna 6; Accelerometer; 9. Cube shell; 10. Microstrip antenna 3; 11. Cylinder shell; 12. Power on; 13. Single chip microcomputer initialization; 14. Acceleration sensor initialization; 15. Sensor, circuit sleep; 16. Start sensor, circuit ;17. Judging the attitude; 18. Turning on the non-ground antenna; 19. Continuously sending signals.

5. Specific implementation

Non-limiting examples of the wireless beacon device of the present invention are as follows:

Embodiment 1. Wireless beacon device

The specific structure of the wireless beacon device of this example is jointly shown by Fig. 1, Fig. 2, Fig. 4, and Fig. 1 shows the structural block diagram of the wireless beacon device of this example, Fig. 2 shows the cubic shape of the wireless beacon device Structural diagram, Fig. 4 shows microcomputer (single-chip microcomputer) flowchart. This wireless beacon device is made up of cube shell or casing and microcomputer 7 in it and the sensor-three-dimensional accelerometer 8 of the device attitude of its control, electronic circuit 2 and 3, power supply (battery 1) etc. to form. When the wireless beacon device in this example is a cube 9 (or cuboid), a microstrip antenna is respectively fixed or arranged on each surface. In this way, when the wireless beacon device falls on the ground, at least one side is not facing the ground, or one side is facing the sky. Such a design choice is also reasonable. The microcomputer of this example adopts single-chip microcomputer, and single-chip microcomputer can adopt 51 series, AVR series, MSP430 series, PIC series etc., and this single-chip microcomputer is connected with acceleration sensor 8, is also connected with six (n=6) road analog switches 3, is also connected with wireless transmitter Module 2, each analog switch of the six-way analog switch 3 is respectively connected to the microstrip antenna (4, 5, 6, 10, etc.) arranged on one of the six surfaces of the wireless beacon device housing, and the wireless transmitting module 2 is connected to the six-way analog switch. Each analog switch of switch 3 is respectively connected to the microstrip antenna (4, 5, 6, 10, etc.) arranged on each surface of the wireless beacon device housing, and the microstrip antenna in this example is made of copper clad laminate The technology can withstand the large impact acceleration when the wireless beacon device is on the ground without damage. The analog switch 3 of this example can use MAX4634, MAX4663, ADG706 and so on. The wireless transmitting module 2 of this example can be an analog transmitting module or an integrated transmitting module, such as nRF9X series, nRF24 series and the like. The microcomputer 7 of the wireless beacon device of this example and its software obtain the information of the attitude of the wireless beacon device close to the ground through the acceleration sensor 8, and control the multi-channel analog switch 3 to select and close the non-ground microstrip according to the information of the device attitude close to the ground. The antenna works so that the wireless transmitting module 2 transmits wireless beacon information through the non-ground microstrip antenna. The sensor of the device attitude of this example-three-dimensional accelerometer can be selected from: integrated MEMS three-dimensional accelerometer, such as MMA845nQ series (n=1,2,3,4) of freescale company, MMA7260, Japan Hokuriku Electric Industry Co., Ltd. HAAM-301A, KXP84 from Kionix, SMB363 from BOSCH, etc. They are 3-axis digital low-g acceleration sensors integrated in a single chip using MEMS technology, and the communication interface adopts SPI or I ² C form. The microcomputer (single-chip microcomputer) flow chart shown in Fig. 4, in the figure: 12 is power-on, 13 is the initialization of single-chip microcomputer, 14 is the initialization of acceleration sensor, 15 is sensor, circuit dormancy, 16 is start sensor, circuit, 17 is judge attitude , 18 is to turn on the non-ground antenna, and 19 is to continuously send signals. The working process of the wireless beacon device of this example is illustrated in conjunction with FIG. 4: after power-on, the microcomputer (single-chip microcomputer) 7 enters initialization, the acceleration sensor is initialized, and the acceleration sensor 8 and circuits 2, 3, etc. of the configuration enter a low power consumption state (i.e. dormant state). In this state, the wireless beacon device flies together with the flying objects, and the flying objects include missiles, airplanes, aircraft, rockets, missiles, satellites and other flying objects. After the wireless beacon device receives the starting command, the circuits 2 and 3 return to the normal working state, turn on the acceleration sensor 8, etc., and judge the posture of the wireless beacon machine and the microstrip antenna (4, 5, 6, 10 etc.) towards the ground. The microcomputer 7 controls the series analog switch 3 to close or open the non-ground microstrip antenna, and controls to turn on the wireless transmitting module 2 to continuously send wireless information through the non-ground microstrip antenna.

Embodiment 2. Wireless beacon device

The specific structure of the wireless beacon device of this example can be jointly shown in Figure 1, Figure 3, and Figure 4. The difference between the wireless beacon device of this example and the wireless beacon device of Embodiment 1 is: the wireless beacon device of this example The type structure diagram is shown in Fig. 3, and the wireless beacon device shown in Fig. 3 is the exterior structure of a cylinder (11). The microcomputer of the wireless beacon device in this example can use DSP (such as TMS320X, etc.), and the microstrip antenna adopts a multi-channel independent microstrip structure, and the start, operation, and work are controlled by multiple independent analog switches 3 . The antennas of these microstrip structures are fixed on the surface of the wireless beacon device in this example. When the wireless beacon device is a cylinder, the cylindrical surface is divided into 6 (or 4, or 5, or 7, or 8, etc.) equal parts. Fix or arrange a microstrip antenna (4, 5, 6, 10, etc.) on each of them, so that when the wireless beacon machine falls on the ground, at least one side does not face the ground, or one side faces the sky. It is more reasonable to fix a microstrip antenna on the area divided into 6 (or 4, or 5, or 7, or 8, etc.) equal parts on the cylindrical surface. The rest of the wireless beacon device in this example is the same as that described in Embodiment 1 and will not be repeated here.

Embodiment 3. Wireless beacon device

The general structure of the wireless beacon device of this example can be jointly shown in Figure 1, Figure 4, etc. The difference between the wireless beacon device of this example and the wireless beacon device of Embodiment 1 and Embodiment 2 is: the wireless beacon device of this example The external structure diagram of the device is a regular decahedron. Fix or arrange a microstrip antenna on each surface respectively, there are ten microstrip antennas in total, controlled by ten independent analog switch circuits 3, the microcomputer of this example can adopt ARM device (such as S3C2410, S3C6410 etc.). The rest of the wireless beacon device in this example is the same as that described in Embodiment 1 and Embodiment 2, and will not be repeated here.

Embodiment 4. Wireless beacon device

The general structure of the wireless beacon device of this example can be jointly shown in Figure 1, Figure 4, etc. The difference between the wireless beacon device of this example and the wireless beacon device of Embodiment 1 to Embodiment 3 is: the wireless beacon device of this example The external structure diagram of the device is a regular tetrahedron. A microstrip antenna is respectively fixed or arranged on each surface, and there are four microstrip antennas in total, which are controlled by four independent analog switch circuits 3 . The rest of the wireless beacon device in this example is the same as that described in Embodiment 1 to Embodiment 3, and will not be repeated here.

Embodiment 5. Wireless beacon device

The general structure of the wireless beacon device in this example can be jointly shown in Figure 1, Figure 2, Figure 4, etc. The difference between the wireless beacon device in this example and the wireless beacon device in Embodiment 1 to Embodiment 4 is as follows: The external structure diagram of the wireless beacon device is a cuboid. The rest of the wireless beacon device in this example is the same as that described in Embodiment 1 to Embodiment 4, and will not be repeated here.

Claims (3)

1. wireless beacon device, electronic circuit by microcomputer and control thereof is formed, be characterised in that: the microcomputer of described wireless beacon device is connected with the sensor-three-dimensional accelerometer of device attitude, also be connected with the n path analoging switch, also be connected with wireless transmitter module, wherein, every path analoging switch of n path analoging switch connects the microstrip antenna that is arranged on one of n surface of wireless beacon device case respectively, wireless transmitter module connects every path analoging switch of n path analoging switch and the corresponding respectively microstrip antenna that is arranged on one of n surface of wireless beacon device case that connects, and described n selects 4～10 integer.

2. wireless beacon device according to claim 1 is characterised in that: when described wireless beacon device is right cylinder, be divided on the face of cylinder that each fixes or be provided with a microstrip antenna on the area of 4 to 6 equal portions.

3. wireless beacon device according to claim 1 is characterised in that: when described wireless beacon device is rectangular parallelepiped or square, fix or be provided with a microstrip antenna respectively on each surface.

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