An RTK positioning base station

Abstract

The utility model provides a kind of RTK positioning base station, it is related to positioning base station technical field, including waterproof distribution box, full-frequency survey antenna, 4G antenna, water immersion sensor, waterproof distribution box, GPS receiver / transmitter, leakage protector, 12V DC power supply, 4G DTU module, self-drying module, humidity sensor, lead-acid battery and dual power supply change-over switch.Full-frequency survey antenna receives multi-frequency signal, 12V DC power supply powers 4G DTU module, leakage protector is used to cut off power supply, GPS receiver / transmitter receives satellite data, 4G DTU module carries out protocol conversion to data, water immersion sensor collects water immersion data and alarm according to regulation, self-drying module absorbs water vapor in box, humidity sensor measures humidity, lead-acid battery is used to provide backup power supply, dual power supply change-over switch is used to realize the power supply switching between two power supplies.The application has the beneficial effects that: it has good portability, can reduce base station erection difficulty and cost, improve waterproof performance.

Description

Technical Field

[0001] This utility model relates to the field of positioning base station technology, specifically to an RTK positioning base station. Background Technology

[0002] Currently, outdoor navigation is mainly achieved through the Global Navigation Satellite System (GNSS). The GNSS point positioning method achieves positioning function through the principle of triangulation. As long as the distance measurement information between three or more satellites and the user is obtained, the user's actual location information can be calculated.

[0003] However, GNSS point positioning methods have a problem: most users' smart terminals are mobile phones, tablets, etc., which mostly use small, low-cost linearly polarized antennas. These antennas are highly sensitive and can still receive satellite data when the GNSS signal strength is low. But because of this, they are also very susceptible to interference from multipath signals, resulting in low positioning accuracy, usually only at the meter level. In contrast, GNSS positioning methods based on real-time dynamic differential positioning (RTK) technology use synchronized observation data from the base station and the rover to eliminate satellite clock errors and receiver clock errors, achieving high-precision positioning with an accuracy of up to the centimeter level, significantly better than the single-point positioning accuracy of traditional GPS.

[0004] However, RTK positioning technology also has its limitations. It requires observation data from two receivers, and if the user's terminal is used as the mobile station, an additional base station is needed. Therefore, RTK positioning technology has high requirements for the number of base stations. To ensure the coverage of RTK positioning, a large number of base stations need to be built, which greatly increases costs. Therefore, using a power distribution box as a container to create a portable mobile RTK positioning base station is a good choice from both a cost and feasibility perspective. However, mobile RTK positioning base stations are generally placed in harsh, open-air environments, and water ingress and power supply are pressing issues that need to be addressed. Summary of the Invention

[0005] To address the problems mentioned above, this utility model provides an RTK positioning base station that can reduce the difficulty and cost of base station installation and improve waterproof performance.

[0006] To achieve the above objectives, this utility model provides an RTK positioning base station, including a waterproof distribution box, a full-band measurement antenna, a 4G antenna and a sealing ring, as well as a GPS signal receiver / transmitter, a leakage current protector, a 12V DC power supply and a 4G DTU module installed in the waterproof distribution box;

[0007] The residual current device (RCD) is electrically connected to a 12V DC power supply.

[0008] The GPS signal receiver / transmitter is electrically connected to the 4G DTU module for capturing and decoding satellite signals, and sending the processed signal data to the 4G DTU module.

[0009] The 4G DTU module is used to receive raw data from the GPS signal receiver / transmitter and perform protocol conversion.

[0010] The 4G antenna connects to the 4G DTU module and is used for data exchange between the base station and external devices.

[0011] The full-frequency measurement antenna is connected to the GPS signal receiver / transmitter via an antenna feeder to receive multi-frequency signals;

[0012] The sealing ring is used to seal the gap between the cover and the box body when the waterproof distribution box is closed;

[0013] A 12V DC power supply is used to power the 4G DTU module and the GPS signal receiver / transmitter.

[0014] Furthermore, the waterproof distribution box is also equipped with: lead-acid batteries and a dual power supply switch;

[0015] Lead-acid batteries are used to provide backup power for 4G DTU modules and GPS signal receivers / transmitters;

[0016] The dual power transfer switch is electrically connected to both a lead-acid battery and a 12V DC power supply to enable switching between power sources.

[0017] The dual power supply switch is also electrically connected to the 4G DTU module and the GPS signal receiver / transmitter.

[0018] Furthermore, the waterproof distribution box is equipped with a waterproof cable connector and a waterproof aviation plug female on the side, and has small holes on the top cover;

[0019] Waterproof cable connectors are used to allow antenna feed lines to pass through waterproof distribution boxes;

[0020] Waterproof aviation plug female, electrically connected to the residual current device (RCD), used to allow the RCD to be connected to an external 220V DC power supply;

[0021] The small holes on the top cover are used to allow the 4G antenna connection cable to pass through the waterproof distribution box.

[0022] Furthermore, the 4G antenna has adhesive coating on its back, which is then attached to the small hole on the outside of the top cover and completely covers the hole.

[0023] Furthermore, the 4G DTU module supports directly converting serial port data into TCP / IP data packets.

[0024] Furthermore, the full-band measurement antenna includes: a measurement antenna, a support frame, and an antenna suction cup;

[0025] The measuring antenna is connected to the antenna suction cup via a support frame.

[0026] The support frame is fixed at both ends to the measuring antenna and the antenna suction cup, respectively.

[0027] The antenna suction cup, with glue applied to its bottom, is attached to the outside of the top cover of the waterproof distribution box on the side away from the 4G antenna.

[0028] Furthermore, the waterproof distribution box is also equipped with a water immersion sensor, specifically installed on the bottom surface of the waterproof distribution box, below the waterproof cable connector, and below the waterproof aviation plug female connector.

[0029] Furthermore, the water immersion sensor communicates with a 4G DTU module via a low-power wide area network to collect water immersion data and issue an alarm.

[0030] Furthermore, the waterproof distribution box is also equipped with a self-drying module and a humidity sensor. The self-drying module uses granular silica gel desiccant to adsorb water vapor.

[0031] The humidity sensor communicates with the 4G DTU module via a low-power wide area network to collect humidity information inside the waterproof distribution box and triggers an alarm when the humidity exceeds the allowable threshold.

[0032] Furthermore, the portion of the antenna feed line that passes through the waterproof connector is covered with an outer sheath of RVV 2*1.0 wire.

[0033] Beneficial effects: This utility model provides an RTK positioning base station, which has the following beneficial effects:

[0034] (1) Its accessories are assembled on the surface and inside of the waterproof distribution box, which has good portability and can reduce the difficulty and cost of base station construction.

[0035] (2) Sealing measures were taken and immersion and humidity alarms were set up to improve waterproof performance;

[0036] (3) Lead-acid batteries can provide backup power in time when the power supply is interrupted, ensuring the normal operation of the base station. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0038] Figure 1 This is a wiring diagram of the present invention;

[0039] Figure 2This is a schematic diagram of the structure of this utility model;

[0040] Figure 3 This is a front view of the present invention;

[0041] Figure 4 This is a schematic diagram of the sealing ring;

[0042] In the diagram, 1-waterproof distribution box, 2-full-band measurement antenna, 3-4G antenna, 4-water immersion sensor, 5-GPS signal receiver / transmitter, 6-leakage current protector, 7-12V DC power supply, 8-4G DTU module, 9-self-drying module, 10-humidity sensor, 11-lead-acid battery, 12-sealing ring, 13-dual power supply switch, 101-waterproof cable connector, 102-waterproof aviation plug female, 103-small hole, 201-measurement antenna, 202-support frame, 203-antenna suction cup. Detailed Implementation

[0043] like Figures 1-3 As shown, an RTK positioning base station includes a waterproof power distribution box 1, a full-band measurement antenna 2 and a 4G antenna 3 and a sealing ring 12, as well as a GPS signal receiver / transmitter 5, a leakage current protector 6, a 12V DC power supply 7, a 4G DTU module 8, a self-drying module 9, a humidity sensor 10, a lead-acid battery 11 and a dual power supply switching switch 13 installed inside the waterproof power distribution box 1.

[0044] The 12V DC power supply 7, model LRS-35-12 from Mean Well Power, has a rated voltage of 12V and a rated current of 3A. It is electrically connected to the dual power supply switch 13 via an RV1.0 single-core flexible wire and is used to power the 4G DTU module 8 and the GPS signal receiver / transmitter 5.

[0045] The residual current device 6 is connected to the 12V DC power supply 7 via an RV1.0 single-core flexible wire, and is also connected to an external 220V AC power supply. It is used to cut off the 12V DC power supply 7 when there is a leakage in the line or equipment.

[0046] The lead-acid battery 11, model CP12120 from Sanrui Power Technology, has a rated voltage of 12V. It is electrically connected to the dual power transfer switch 13 via an RV1.0 single-core flexible wire and is used to provide backup power to the 4G DTU module 8 and the GPS signal receiver / transmitter 5. It can provide power for two days.

[0047] The lead-acid battery 11 and the 12V DC power supply 7 are connected to the input terminal of a dual power supply switch 13 to switch the power supply. The dual power supply switch 13 is the 8A series of Yaotao Electronics. The 12V DC power supply 7 is connected to the common power supply terminal of the dual power supply switch 13, and the lead-acid battery 11 is connected to the backup power supply terminal of the dual power supply switch 13.

[0048] GPS signal receiver / transmitter 5 is used to capture and decode satellite signals and send the processed signal data to 4G DTU module 8. It is connected to 4G DTU module 8 and dual power switch 13 through power communication line.

[0049] The power communication cable includes a power cable and a communication cable. The power cable is used for power supply, and the communication cable is used for data exchange. One end is a connector, and the other end has 5 wires, which correspond to the VCC and GND wires of the power cable, and the GND, 232_R0, and 232_T0 wires of the communication cable.

[0050] The 4G DTU module 8, model USR-G771 from Yourenlian, supports direct conversion of serial port data into TCP / IP data packets. It has 5 interfaces: "+", "-", "G", "TX", and "RX".

[0051] The wiring method for the above modules is as follows:

[0052] The "+V" and "-V" interfaces of the 12V DC power supply 7 are connected to the "+" and "-" interfaces of the leakage current protector 6, respectively. The "L" and "N" interfaces of the 12V DC power supply 7 are connected to the "+" and "-" interfaces of the commonly used power supply terminal of the dual power supply switch 13, respectively.

[0053] The "+V" and "-V" interfaces of lead-acid battery 11 are connected to the "+" and "-" interfaces of the backup power terminal of dual power supply switch 13, respectively.

[0054] The "+" and "-" interfaces of the output terminal of the dual power switch 13 are connected to the "+" and "-" interfaces of the 4G DTU module 8. At this time, the power line of the GPS signal receiver / transmitter 5 can also be electrically connected to the dual power switch 13 through the "+" and "-" interfaces of the 4G DTU module 8.

[0055] The connector of the power communication line is connected to the interface corresponding to the GPS signal receiver / transmitter 5. The VCC line and GND line in its power line are connected to the "+" interface and "-" interface in the 4G DTU module 8, respectively. The GND line, 232_R0 line and 232_T0 line in its communication line are connected to the "G" interface, "TX" interface and "RX" interface in the 4G DTU module 8, respectively.

[0056] The waterproof distribution box 1 is equipped with a waterproof cable connector 101 and a waterproof aviation plug female 102 on the side, and has a small hole 103 on the top cover;

[0057] The cable waterproof connector 101 is used to allow the antenna feeder to enter the interior of the waterproof distribution box 1. The portion of the antenna feeder at the cable waterproof connector 101 is covered with an outer sheath of RVV 2*1.0 wire to improve the sealing performance.

[0058] Waterproof aviation plug female 102, using RVV 2*1.0 2-core sheathed flexible wire to connect to the residual current device 6, for connecting the residual current device 6 to an external 220V DC power supply;

[0059] The small hole 103 on the top cover is used to allow the connection wire of the 4G antenna 3 to enter the interior of the waterproof distribution box 1.

[0060] The back of the 4G antenna 3 is coated with adhesive. After peeling off the adhesive film, stick it to the position of the small hole 103 on the outside of the top cover, completely covering the small hole 103, and lock it with the matching nut on the inside of the top cover. The other end of the connecting wire of the 4G antenna 3 is connected to the corresponding interface of the 4G DTU module 8.

[0061] The full-band measurement antenna 2, model AT360A from Sinan Navigation, includes: measurement antenna 201, support frame 202 and antenna suction cup 203;

[0062] Both ends of the support frame 202 are threaded structures, which are fixed to the measuring antenna 201 and the antenna suction cup 203 respectively, thus completing the assembly of the full-band measuring antenna 2;

[0063] The bottom surface of the antenna suction cup 203 is coated with Kraft K-704NB adhesive, and it is attached to the outside of the top cover of the waterproof distribution box 1 on the side away from the 4G antenna 3.

[0064] Connect the two ends of the antenna feed line 201 to the corresponding interfaces of the full-frequency measurement antenna 2 and the GPS signal receiver / transmitter 5, respectively.

[0065] The water immersion sensor 4 is a wireless water immersion sensor that communicates with the 4G DTU module 8 via a low-power wide area network. It is installed inside the waterproof distribution box 1, specifically at the bottom surface of the waterproof distribution box 1, the lower side of the waterproof cable connector 101, and the lower side of the waterproof aviation plug female 102.

[0066] When the water immersion sensor 4 detects water immersion, it immediately triggers an alarm and sends the alarm information to the staff via the 4G DTU module.

[0067] The self-drying module 9 is installed on the bottom of the waterproof distribution box and uses granular silica gel desiccant to adsorb water vapor in the waterproof distribution box 1.

[0068] Humidity sensor 10 is installed at the bottom of waterproof distribution box 1 and communicates with 4G DTU module 8 via low power wide area network to collect humidity information inside waterproof distribution box 1. When the humidity exceeds 70%, alarm information is sent to staff via 4G DTU module 8.

[0069] like Figure 4 As shown, the size of the sealing ring 12 is adapted to the waterproof distribution box 1. When the waterproof distribution box 1 is closed, the sealing ring 12 will be used to seal the gap between the cover and the box body.

[0070] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An RTK positioning base station, characterized in that: Includes a waterproof distribution box (1), a full-band measurement antenna (2), a 4G antenna (3) and a sealing ring (12), as well as a GPS signal receiver / transmitter (5), a leakage current protector (6), a 12V DC power supply (7) and a 4G DTU module (8) installed in the waterproof distribution box (1). The residual current device (6) is electrically connected to the 12V DC power supply (7); The GPS signal receiver / transmitter (5) is electrically connected to the 4G DTU module (8) for capturing and decoding satellite signals and sending the processed signal data to the 4G DTU module (8). The 4G DTU module (8) is used to receive the raw data received by the GPS signal receiver / transmitter (5) and perform protocol conversion; The 4G antenna (3) is connected to the 4G DTU module (8) for data exchange between the base station and external devices; The full-frequency measurement antenna (2) is connected to the GPS signal receiver / transmitter (5) via an antenna feeder to receive multi-frequency signals; The sealing ring (12) is used to seal the gap between the cover and the box body when the cover of the waterproof distribution box (1) is closed; A 12V DC power supply (7) is used to power the 4G DTU module (8) and the GPS signal receiver / transmitter (5).

2. The RTK positioning base station according to claim 1, characterized in that: The waterproof distribution box (1) is also equipped with: lead-acid battery (11) and dual power supply switch (13). Lead-acid batteries (11) are used to provide backup power for the 4G DTU module (8) and the GPS signal receiver / transmitter (5); The dual power supply switch (13) is electrically connected to both the lead-acid battery (11) and the 12V DC power supply (7) to enable switching between power supplies. The dual power supply switch (13) is also electrically connected to the 4G DTU module (8) and the GPS signal receiver / transmitter (5).

3. The RTK positioning base station according to claim 1, characterized in that: The waterproof distribution box (1) is equipped with a waterproof cable connector (101) and a waterproof aviation plug female (102) on the side, and has a small hole (103) on the top cover. A waterproof cable connector (101) is used to allow the antenna feeder to pass through a waterproof distribution box (1). Waterproof aviation plug female (102) is electrically connected to the leakage current protector (6) to allow the leakage current protector (6) to be connected to an external 220VDC power supply; The small hole (103) on the top cover is used to allow the connection wire of the 4G antenna (3) to pass through the waterproof distribution box (1).

4. An RTK positioning base station according to claim 3, characterized in that: The 4G antenna (3) is coated with glue on the back and is attached to the small hole (103) on the outside of the top cover, completely covering the small hole (103).

5. An RTK positioning base station according to claim 1, characterized in that: The 4G DTU module (8) mentioned above supports directly converting serial port data into TCP / IP data packets.

6. An RTK positioning base station according to claim 1, characterized in that: The full-band measurement antenna (2) includes: a measurement antenna (201), a support frame (202), and an antenna suction cup (203). The measuring antenna (201) is connected to the antenna suction cup (203) via the support frame (202); The support frame (202) is fixed at both ends to the measuring antenna (201) and the antenna suction cup (203), respectively; The antenna suction cup (203) is coated with glue on the bottom and is attached to the outside of the top cover of the waterproof distribution box (1) on the side away from the 4G antenna (3).

7. An RTK positioning base station according to claim 1, characterized in that: The waterproof distribution box (1) is also equipped with a water immersion sensor (4), which is installed at the following locations: the bottom of the waterproof distribution box (1), the lower side of the waterproof cable connector (101), and the lower side of the waterproof aviation plug female (102).

8. An RTK positioning base station according to claim 7, characterized in that: The water immersion sensor (4) communicates with the 4G DTU module (8) via a low-power wide area network to collect water immersion data and issue an alarm.

9. An RTK positioning base station according to claim 1, characterized in that: The waterproof distribution box (1) is also equipped with a self-drying module (9) and a humidity sensor (10). The self-drying module (9) uses granular silica gel desiccant to adsorb water vapor. The humidity sensor (10) communicates with the 4G DTU module (8) via a low-power wide area network to collect humidity information inside the waterproof distribution box (1) and to trigger an alarm when the humidity exceeds the allowable threshold.

10. An RTK positioning base station according to claim 3, characterized in that: The portion of the antenna feed line that passes through the waterproof connector (101) is covered with an outer sheath of RVV 2*1.0 wire.

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