Portable screen display compass

Abstract

The utility model provides a portable screen display compass which at least comprises a shell, two antennas, a power supply, a display screen embedded in the front of the shell, and a positioning and orientation board card, a single chip microcomputer and a display unit which are packaged in the shell, the antennas are external measurement antennas, and the antennas are connected with the positioning and orientation board card through cables; a fixed seat is fixed at the back of the shell, two antenna mounting seats are detachably mounted on the fixed seat, and the two antennas are respectively fixed on the two antenna mounting seats. The screen display compass is convenient to carry, the position of the antenna can be adjusted, and the screen display compass is suitable for field measurement.

Description

Technical Field

[0001] The utility model relates to the technical field of screen display compasses, in particular to a portable screen display compass. Background Art

[0002] A compass is an instrument used to determine direction and the bearing of objects. Traditional compasses are mainly divided into magnetic and gyro compasses. Magnetic compasses utilize the north-pointing property of a magnetic needle, but they suffer from low accuracy, slow response, and susceptibility to interference. A gyro compass, also known as a gyrocompass, utilizes the fixed axis and precession properties of a gyroscope, combined with the Earth's rotation vector and gravity vector, using control and damping devices to provide a true north reference. However, gyro compasses have disadvantages such as high cost, poor dynamics, and complex operation.

[0003] Due to the rapid development of GPS satellite positioning and orientation technology, an on-screen compass (also known as a GPS compass) based on this technology has been introduced to the market. This on-screen compass consists of a positioning and orientation board, two measurement antennas, a single-chip microcontroller, a display unit, and a storage unit. The positioning and orientation board acts as a satellite signal sensor, receiving satellite information via two measurement antennas. The single-chip microcontroller utilizes real-time carrier phase measurement and rapid integer ambiguity resolution to calculate the angle between the baseline vector between the two antennas and true north. It also accurately calculates the vehicle's heading angle, pitch angle, position, velocity, drift angle, and UTC time. The display unit decodes the received satellite positioning and orientation information and displays it on an LCD screen, while simultaneously storing the data in the storage unit. This on-screen compass overcomes the shortcomings of traditional magnetic and gyro compasses, offering high measurement accuracy, excellent stability, zero drift, zero cumulative error, and immunity to magnetic variations. It is suitable for positioning and orientation applications for satellite communication vehicles, river operation vessels, and unmanned aerial vehicles (UAVs).

[0004] The main unit and antenna of existing on-screen compasses can be either integrated or separate. However, integrated on-screen compasses have a long distance between the two antennas, making them inconvenient to carry when working in the field. Adjusting the antenna position is also difficult when the antenna is obstructed. Separate on-screen compasses require the antenna and cable to be stored and carried separately, making them easy to lose. Furthermore, the antenna cable is long and easily tangled. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a portable screen display compass, which is easy to carry and can adjust the antenna position, and is suitable for field measurement.

[0006] The technical solutions adopted to achieve the above-mentioned purpose of the utility model are:

[0007] A portable screen-display compass comprises at least a housing, two antennas, a power supply, a display screen embedded in the front of the housing, and a positioning and orientation board, a single-chip microcomputer, and a display unit encapsulated in the housing. The antenna is an external measurement antenna connected to the positioning and orientation board via a cable. A fixing base is fixed to the rear of the housing, on which two antenna mounting bases are detachably mounted, and the two antennas are fixed to the two antenna mounting bases respectively.

[0008] When the on-screen compass is not in use, the cable is wrapped around the antenna mount.

[0009] The antenna mounting seat includes a connecting part, a wire winding part and a mounting part, which are connected in sequence into an integrated structure and form an I-shaped "spool" structure. The antenna is fixed on the mounting part, the wire winding part is cylindrical, the cable is wound on the wire winding part, and the connecting part can be detachably mounted on the fixing seat.

[0010] The fixing seat is provided with two slots. The cross section of the connecting portion of the antenna mounting seat is in an N shape, and the connecting portion is clamped and installed in the slots.

[0011] The connecting portion in the slot is provided with a pin hole in the horizontal direction, and the fixing seat is also provided with a corresponding pin hole. The connecting portion and the fixing seat are connected by a fixing pin, thereby connecting and fixing the antenna mounting seat to the fixing seat.

[0012] The power source is a lithium battery, which is also encapsulated in the shell.

[0013] A handle is connected to the top of the shell.

[0014] Compared with the existing technology, the technical solution provided by the utility model has the following advantages:

[0015] 1. The portable screen-display compass provided in the utility model has a split structure of antenna and screen-display compass body, which is small in size and weight. At the same time, the antenna can be detachably mounted on the back of the shell through the antenna mounting base, which is convenient to carry and the height and position of the antenna can be adjusted during use, making it suitable for field measurement.

[0016] 2. In the present invention, the antenna and the housing are connected by a fixing pin, the connection structure is simple, and the antenna can be easily assembled and disassembled.

[0017] 3. In the present invention, the antenna mounting base is provided with a winding portion for winding the antenna cable. At the same time, the mounting portion and the connecting portion can also limit the cable, making it convenient to store the cable and avoid entanglement of the cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the portable screen display compass in the utility model with the antenna stored;

[0019] Figure 2 This is a side view of the portable screen display compass of the present invention with the antenna stored;

[0020] Figure 3 This is a rear view of the portable screen display compass of the present invention with the antenna stored;

[0021] Figure 4 This is a structural diagram of the portable screen display compass in the present utility model with the antenna opened;

[0022] Figure 5 This is a side view of the portable screen display compass of the present invention with the antenna opened;

[0023] Figure 6 This is a schematic diagram of the connection between the antenna, antenna mounting base and fixing base in the present invention;

[0024] Figure 7 This is a side view of the antenna mounting base in the present utility model;

[0025] In the figure: 1-housing, 2-antenna, 3-display screen, 4-cable, 5-fixing seat, 6-slot, 7-antenna mounting seat, 71-connecting part, 72-winding part, 73-mounting part, 8-fixing pin, 9-handle, 10-pin hole. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The portable screen display compass provided by the utility model is as follows Figures 1 to 6 As shown, it at least includes a housing 1, two antennas 2, a power supply, a display screen 3 embedded in the front of the housing, a positioning and orientation board, a single chip microcomputer and a display unit.

[0028] To facilitate outdoor use of the on-screen compass, this embodiment uses a high-capacity lithium battery as its power source, capable of over five hours of continuous operation at room temperature. The lithium battery, along with the positioning and orientation board, single-chip microcontroller, and display unit, are enclosed within the housing, protecting these critical components from dust and rain, making the on-screen compass convenient for outdoor use. Furthermore, a handle 9 is attached to the top of the housing for easy portability.

[0029] The antenna is connected to the positioning and orientation board, which is a multi-frequency, high-precision positioning and orientation board for the entire system. The positioning and orientation board is connected to a single-chip microcontroller. The antenna receives satellite information, and the positioning and orientation board acts as a satellite signal sensor, collecting and transmitting this information to the single-chip microcontroller. The single-chip microcontroller calculates the angle between the baseline vector between the two antennas and true north. The display unit decodes the received satellite positioning and orientation information and sends it to the display screen for display. The data is also stored in the storage unit. The connections and operating principles between the antenna, positioning and orientation board, single-chip microcontroller, display unit, display screen, and storage unit are all prior art and will not be described in detail here.

[0030] In this embodiment, the antenna and the screen display compass body are of a split structure, that is, the antenna is a three-system seven-frequency external measurement antenna, and the antenna is connected to the positioning and orientation board through a cable 4.

[0031] A fixing base 5 is fixed at the rear of the housing, and two antenna mounting bases 7 are detachably mounted on the fixing base. The two antennas are fixed on the two antenna mounting bases respectively.

[0032] In this embodiment, the fixing base is provided with two slots 6, and the antenna mounting base 7 is detachably mounted on the two slots, and the antenna mounting base is connected to the fixing base through a fixing pin 8; when the screen display compass is not in use, the cable is wound around the antenna mounting base, such as Figure 6 As shown in the figure, only one of the two slots is installed with an antenna mounting base and an antenna, and the other one is not installed.

[0033] Specifically, the antenna mounting base includes a connecting portion 71, a winding portion 72 and a mounting portion 73, which are sequentially connected into an integrated structure and form an I-shaped "spool" structure, such as Figure 7 As shown. The winding part is cylindrical, and when the cable is wound on the winding part, the connecting parts and the mounting parts on both sides can limit the cable to prevent the cable from being loose. The antenna is fixed on the mounting part, the cross-section of the connecting part is n-shaped, and the connecting part is clamped in the slot. A pin hole 10 is provided in the horizontal direction on the connecting part in the slot, and a pin hole is also provided on the fixing seat. The fixing pin passes through the pin hole in turn, thereby connecting and fixing the antenna mounting seat to the fixing seat. The fixing seat and the antenna mounting seat can also be detachably connected by means of bolts, buckles, etc. For example, when connected by buckles, the antenna mounting seat can be inserted into the buckle of the slot. When disassembling, just press the buckle.

[0034] In this embodiment, when the antenna needs to be opened, it is only necessary to pull out the fixing pin and remove the antenna mounting base. The bottom surface of the mounting part of the antenna mounting base is a strong magnetic surface. After the antenna is opened, the mounting part is magnetically adsorbed on the metal surface of the measured position, and the center distance between the two antennas is ensured to be greater than 1 meter. In order to ensure that the mounting part and the metal surface are firmly adsorbed, fasteners can be used to strengthen the fixation; when the screen display compass is finished using, the cable is wrapped around the winding part, the connecting part is clamped in the slot, and the fixing pin is inserted.

Claims

1. A portable screen-display compass comprising at least a housing, two antennas, a power supply, a display screen embedded in the front of the housing, and a positioning and orientation board, a single-chip microcomputer, and a display unit encapsulated in the housing, characterized in that: The antenna is an external measurement antenna, which is connected to the positioning and orientation board via a cable. A fixing base is fixed to the rear of the shell, on which two antenna mounting bases are detachably mounted. The antenna mounting base includes a connecting portion, a wire winding portion, and a mounting portion, which are sequentially connected into an integrated structure to form an I-shaped "spool" structure. The two antennas are respectively fixed on the mounting portions of the two antenna mounting bases, and the wire winding portion is cylindrical. When the screen display compass is not in use, the cable is wound around the wire winding portion, and the connecting portion is detachably mounted on the fixing base.

2. The portable on-screen compass according to claim 1, characterized in that: The fixing seat is provided with two slots. The cross section of the connecting portion of the antenna mounting seat is in an N shape, and the connecting portion is clamped and installed in the slots.

3. The portable on-screen compass according to claim 2, characterized in that: The connecting portion in the slot is provided with a pin hole in the horizontal direction, and the fixing seat is also provided with a corresponding pin hole. The connecting portion and the fixing seat are connected by a fixing pin, thereby connecting and fixing the antenna mounting seat to the fixing seat.

4. The portable on-screen compass according to claim 1, characterized in that: The power source is a lithium battery, which is also encapsulated in the shell.

5. The portable on-screen compass according to claim 1, characterized in that: A handle is connected to the top of the shell.

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