CN203084204U - Low-cost ship compass - Google Patents

Low-cost ship compass Download PDF

Info

Publication number
CN203084204U
CN203084204U CN 201320081189 CN201320081189U CN203084204U CN 203084204 U CN203084204 U CN 203084204U CN 201320081189 CN201320081189 CN 201320081189 CN 201320081189 U CN201320081189 U CN 201320081189U CN 203084204 U CN203084204 U CN 203084204U
Authority
CN
China
Prior art keywords
gps receiver
receiver module
compass
low
cost
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320081189
Other languages
Chinese (zh)
Inventor
戴阳
杨胜龙
崔雪森
张盛茂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Original Assignee
East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences filed Critical East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority to CN 201320081189 priority Critical patent/CN203084204U/en
Application granted granted Critical
Publication of CN203084204U publication Critical patent/CN203084204U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a low-cost ship compass, which comprises a first GPS (Global Positioning System) receiving module, a second GPS receiving module and a terminal, wherein the first GPS receiving module and the second GPS receiving module are positioned at different positions, and are connected with the terminal through two serial port converters respectively; the first GPS receiving module and the second GPS receiving module are used for acquiring the position information thereof; and the terminal is used for calculating a true north angle according to the position information obtained by the first GPS receiving module and the second GPS receiving module. The low-cost ship compass has the advantages of low cost, acceptable accuracy which is higher than that of the conventional magnetic compass, output of digital data, and convenience for other instruments to use compass data.

Description

A kind of low-cost mariner's compass
Technical field
The utility model relates to boats and ships compass equipment technical field, particularly relates to a kind of low-cost mariner's compass.
Background technology
Compass is one of indispensable equipment of modern navigation, and ship is known direction by compass.Modern ship generally is equipped with magnetic compass or gyro compass.The magnetic compass price is low, can not lose sensing suddenly generally speaking, but exists error big and be not easy to digitized shortcoming (the general standard magnetic compass is 3 degree, and steering compass is 5 degree); In a single day gyro compass precision height generally has electric signal output and is convenient to expanded application, but price is expensive, and loses power supply, can lose direction-pointing function immediately.Be furnished with two kinds of compass simultaneously on the general large vessel, to learn from other's strong points to offset one's weaknesses, as master compass, magnetic compass is as backup with gyro compass.Normally point to, will use magnetic compass when gyro compass goes wrong with gyro compass.The price price of gyro compass is higher, and generally at tens0000 Renminbi, because the cost restriction, considerable small boat, particularly fishing boat are not equipped with gyro compass, have only magnetic compass pilot.
Along with the appearance of GPS technology, people have developed the GPS compass, and this GPS compass does not have mechanical moving element, and reliable operation is low in energy consumption.But the GPS gyro compass that adopts carrier phase difference principle at present has fast (warm start 1 minute, cold start-up 3 minutes), the precision height (orientation accuracy: 0.7 ° of RMS (C/A code, HDOP<4 in location; Angular resolution: 0.1 °) advantage, but owing to need to adopt special antenna, with and innerly need high-precision Phase Tracking technology, its price is higher, generally several ten thousand to tens0000, it is not very extensive using yet.
The utility model content
Technical problem to be solved in the utility model provides a kind of low-cost mariner's compass, can reduce the cost of existing mariner's compass.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of low-cost mariner's compass is provided, comprise a GPS receiver module, the 2nd GPS receiver module and terminal, a described GPS receiver module is positioned at two different positions with the 2nd GPS receiver module, and links to each other with described terminal by two serial converters respectively; A described GPS receiver module and the 2nd GPS receiver module all are used to obtain the positional information at its place, the angle, positional information calculation geographical north that described terminal is obtained according to a GPS receiver module and the 2nd GPS receiver module.
A described GPS receiver module and the 2nd GPS receiver module are the GPS receiver module of the same model of same manufacturer.
A described GPS receiver module links to each other with terminal by two serial converters with the 2nd GPS receiver module.
Described serial converter is the RS232/485 converter.
Described terminal is handheld computer or portable computer.
The line of a described GPS receiver module and the 2nd GPS receiver module present position is on the axis of ship or with the ship axis and is parallel to each other.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the utility model compared with prior art, have following advantage and good effect: the utility model is cheap, precision still can, be higher than traditional magnetic compass, be output as digitalized data, be convenient to other instruments and use the compass data.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment of the present utility model relates to a kind of low-cost mariner's compass, as shown in Figure 1, comprise a GPS receiver module, the 2nd GPS receiver module and terminal, a described GPS receiver module is positioned at two different positions with the 2nd GPS receiver module, and links to each other with described terminal by two serial converters respectively; A described GPS receiver module and the 2nd GPS receiver module all are used to obtain the positional information at its place, the angle, positional information calculation geographical north that described terminal is obtained according to a GPS receiver module and the 2nd GPS receiver module.The GPS receiver module of the same model that described two GPS receiver modules are same manufacturer, the SIRF third generation high sensitivity microminiature GPS receiver module GR-87 that for example adopts Taiwan HOLUX company to release, can guarantee that so same group of gps satellite of selecting for use of two modules carries out location compute and algorithm is identical, thereby guarantee the validity of differential position algorithm; Because what adopt is cheap commercial GPS receiver module, its general RS232 output port that adopts, this data layout transmission range end, for overcoming this shortcoming, need be translated into the data layout of RS422 or RS485, be beneficial to transmission far away and anti-interference,, can save RS232/485 converter described below if the form of the output data of selecting for use of GPS module own satisfies transmission range and anti-interference requirement; Described RS232/485 converter can be changed data between RS485 and two kinds of forms of RS232, be used to improve communication distance; Two is power lead for twisted-pair feeder is used to transmit the data of RS485 form two in the 4 core shadow data lines, is used for to GPS module and the power supply of RS232/485 converter; Describedly have handheld computers serial ports or other communication interfaces or the portable machine of calculating is used to receive the latitude and longitude information that the GPS module sends, and utilize built-in program to calculate the angle and the output of two module lines and real north.
Wherein, two GPS receiver modules can be installed in unscreened forward andor aft place respectively, the line of two GPS receiver modules is on the axis of ship as far as possible or is parallel with the axis, and the distance between two GPS receiver modules is far away as far as possible, like this precision height of Ce Lianging.The longitude and latitude data of two GPS receiver module output RS232 forms, after being converted into the RS485 form through the RS232/485 converter respectively, twisted-pair feeder through 4 core cables is transferred to the RS485/232 converter with it, and then import computing machine after being converted into the RS232 form, the angle after calculating by the program in the computing machine between two GPS receiver module lines of output and the geographical north.
Terminal is to use the differential position method in principle of calculating, with two commercial GPS modules at a distance of certain distance, obtain its latitude and longitude information respectively after, calculate angle between its line and the geographical north by following method:
Consider the position (A and B) and the arctic point (being made as P) of two commercial GPS modules, form a spherical triangle ABP, it all is great circle (crossing the circle of the centre of sphere) that its three limits are divided, and the limit is represented with lowercase a, b, p.Three angles represent with capitalization A, B, P that respectively then the included angle A of line AB and real north is exactly the drift angle, geographical north of AB, for spherical triangle ABP, the latitude of b=90-A are arranged; The latitude of a=90-B; The longitude of longitude-A of P=B.
The cosine formula of substitution spherical trigonometry:
cosp=cosa*cosb+sina*sinb*cosP
Can obtain the great circle arc length p at AB place,
And then with a cosine formula:
cosa=cosb*cosp+sinb*sinp*cosA
Can obtain the included angle A of AB and real north.
The GPS technology is present widely used global satellite positioning.The common GPS receiver module of producing with common Taiwan HOLUX company is an example, this module adopts high sensitivity, low power consumption chip StarIIIGPS receiving chip, the ability that possesses quick location and follow the trail of 20 satellites, price are about 200 yuan, and bearing accuracy is about 10 meters.
The RS422/485 data transmission technology.RS422/485 adopts a pair of twisted-pair feeder as transmission medium, adopts the balance transmission mode of differential level, has improved antijamming capability, and transmission range can reach 1200 meters, and peak transfer rate is 10Mb/s, and transfer rate can reach 1Mb/s on 100 meters long distances.Can satisfy data transmission distance of the present utility model and transmission speed.
The RS232/485 converter.Because general GPS module is output as the RS232 formatted data, the serial ports that computing machine is commonly used also meets the RS232 standard, but the transmission range of RS232 is generally in 20 meters.For satisfying transmission range requirement of the present utility model, need utilize the RS232/485 converter that data are carried out data transmission by the RS232 normative translation for the RS485 standard.
Microcomputer or handheld computing device.This equipment is used to read the positional information of two GPS module outputs, and the sensing that goes out two GPS module antenna lines with built-in computed in software.
Be not difficult to find that the utility model is cheap, precision still can, be higher than traditional magnetic compass, be output as digitalized data, be convenient to other instruments and use the compass data.

Claims (6)

1. a low-cost mariner's compass comprises a GPS receiver module, the 2nd GPS receiver module and terminal, it is characterized in that, a described GPS receiver module is positioned at two different positions with the 2nd GPS receiver module, and links to each other with described terminal respectively; A described GPS receiver module and the 2nd GPS receiver module all are used to obtain the positional information at its place, the angle, positional information calculation geographical north that described terminal is obtained according to a GPS receiver module and the 2nd GPS receiver module.
2. low-cost mariner's compass according to claim 1 is characterized in that, a described GPS receiver module and the 2nd GPS receiver module are the GPS receiver module of the same model of same manufacturer.
3. low-cost mariner's compass according to claim 1 is characterized in that, a described GPS receiver module links to each other with terminal by two serial converters with the 2nd GPS receiver module.
4. low-cost mariner's compass according to claim 3 is characterized in that, described serial converter is the RS232/485 converter.
5. low-cost mariner's compass according to claim 1 is characterized in that, described terminal is handheld computer or portable computer.
6. low-cost mariner's compass according to claim 1 is characterized in that, the line of a described GPS receiver module and the 2nd GPS receiver module present position is on the axis of ship or with the ship axis and is parallel to each other.
CN 201320081189 2013-02-21 2013-02-21 Low-cost ship compass Expired - Fee Related CN203084204U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320081189 CN203084204U (en) 2013-02-21 2013-02-21 Low-cost ship compass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320081189 CN203084204U (en) 2013-02-21 2013-02-21 Low-cost ship compass

Publications (1)

Publication Number Publication Date
CN203084204U true CN203084204U (en) 2013-07-24

Family

ID=48830028

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320081189 Expired - Fee Related CN203084204U (en) 2013-02-21 2013-02-21 Low-cost ship compass

Country Status (1)

Country Link
CN (1) CN203084204U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105049023A (en) * 2015-06-29 2015-11-11 中国人民解放军63698部队 Gps compass signal distributor
CN106249260A (en) * 2016-09-28 2016-12-21 中国船舶重工集团公司第七0七研究所 A kind of satellite optical fiber compass system and combinations thereof air navigation aid
CN107643683A (en) * 2017-10-27 2018-01-30 西安恒达微波技术开发有限公司 Automatically levelling school north system on equipment vehicular platform based on PID closed-loop controls

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105049023A (en) * 2015-06-29 2015-11-11 中国人民解放军63698部队 Gps compass signal distributor
CN105049023B (en) * 2015-06-29 2017-09-26 中国人民解放军63698部队 GPS compass signal distributors
CN106249260A (en) * 2016-09-28 2016-12-21 中国船舶重工集团公司第七0七研究所 A kind of satellite optical fiber compass system and combinations thereof air navigation aid
CN107643683A (en) * 2017-10-27 2018-01-30 西安恒达微波技术开发有限公司 Automatically levelling school north system on equipment vehicular platform based on PID closed-loop controls

Similar Documents

Publication Publication Date Title
CN204347258U (en) Double antenna GNSS/INS integrated navigation system
CN203084204U (en) Low-cost ship compass
CN203869697U (en) Beidou/GPS and INS combined vehicle-mounted navigation positioning system based on GIS technology
CN101446634A (en) Combination measurement method for high precision position, azimuth angle and pitch angle, and device thereof
CN104049239B (en) A kind of self-organizing ship's fix method based on moving reference point auxiliary
CN105547290A (en) Slave submersible vehicle navigation method based on ultra-short baseline positioning system
CN103760584B (en) A kind of MONITOR AND CONTROL SYSTEM for the actual measurement of floating support mounting
CN103940411A (en) Portable cableless fixed-point profiler
CN110855343A (en) Underwater sound positioning and timing buoy and working method thereof
CN108181630B (en) Beidou double-antenna rotation rapid orientation method
CN106908044B (en) A kind of full sea area tidal observation system and tidal observation method based on Beidou
CN105180950A (en) Vehicle navigation system based on air pressure sensing
CN105444664A (en) Autonomous type underwater vehicle digital rudder angle detection device and rudder angle calibrating method
CN202471071U (en) Semi-automatic navigation positioning system based on total station
CN2788131Y (en) Mini-type underwater self-combination navigation equipment
CN203287532U (en) Position measurement system based on Beidou navigation system
CN201716421U (en) Small underwater vehicle combined navigation device
CN204613744U (en) A kind of Algorithms of Robots Navigation System
CN102879834B (en) Method for implementing communication of navigation data of satellite navigation weather sonde
CN201266086Y (en) GPS compass
CN211741584U (en) High-precision directional terminal based on CORS system
CN1908694B (en) Fixed shipping dynamic precise measurement system
CN206695807U (en) A kind of combined navigation device
CN205374749U (en) High accuracy GNSS basic station
CN202204515U (en) Duplicate magnetic compass

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130724

Termination date: 20150221