CN103499333A - Digital sextant - Google Patents
Digital sextant Download PDFInfo
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- CN103499333A CN103499333A CN201310494032.7A CN201310494032A CN103499333A CN 103499333 A CN103499333 A CN 103499333A CN 201310494032 A CN201310494032 A CN 201310494032A CN 103499333 A CN103499333 A CN 103499333A
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- China
- Prior art keywords
- rotating shaft
- sextant
- microprocessor
- digital
- pedestal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
- G01C1/08—Sextants
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a digital sextant which comprises a mechanical sextant. The mechanical sextant comprises a base which is provided with a fixed mirror, a telescope, a movable arm and an arc dividing disc. One end of the movable arm is provided with a movable mirror and is connected to a base included angle opposite to the dividing disc through a rotating shaft I. The digital sextant further comprises a capacitive gate ruler parallel to the base. One end of a ruler body of the capacitive gate ruler is connected to the movable arm through a rotating shaft II. A vernier of the capacitive gate ruler is connected to the base through a rotating shaft III. The rotating shaft III, the fixed mirror and the rotating shaft I are placed on the same straight line. The distance between the rotating shaft II and the rotating shaft I and the distance between the rotating shaft III and the rotating shaft I are equal. The vernier of the capacitive gate ruler is connected with a microprocessor I in a signal mode. The microprocessor I is connected with a display screen I. The digital sextant has the advantage that digitization of the mechanical sextant is achieved. Angle is measured, and meanwhile the measured starting point distance is automatically computed.
Description
Technical field
The present invention relates to a kind of digital sextant.
Background technology
Use at present the survey ship to carry out in the husky test of water, the measurement of start point distance method commonly used has several as follows: one, section notation, build sign rope (cableway), and determine the vertical line start point distance according to sign board; Two, the GPS positioning system is carried out the start point distance measurement, sets up the GPS net, utilizes GPS to measure start point distance; Three, use mechanical sextant intersection, read intersection angle, then be converted into required start point distance.
Lower Reaches of The Yellow River hydrologic survey most hydrological stations is used mechanical sextant to carry out the measurement of vertical line start point distance, to survey at present boat measurement to test the main test instrument that start point distance is measured, it possesses measures fast, use simple, cheap, the characteristics such as failure rate is low are the irreplaceable test equipment of other modernization distance mearuring equipment.But mechanical sextant carries out the start point distance measurement part that also comes with some shortcomings: 1, can only read intersection angle (calibration disc type), the about 1mm of every degree spacing, reading is difficulty comparatively, sometimes error in reading may appear, and the number of degrees and mark will read in different positions, then synthesize angle, reading bothers very much; 2, the data of surveying are intersection angle, are not our required start point distance data, need just can obtain vertical line start point distance numerical value by manually being calculated (or tabling look-up), bring unnecessary trouble; 3, the information of sextant observation is not numerical information, can not be identified by computing machine, can't realize the data communication between sextant and computing machine, has hindered the development of computing machine Enterprise model, processing.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of labour intensity that alleviates the test personnel, improve the digital sextant of test equipment automatization level.
The present invention is achieved by the following measures:
A kind of digital sextant of the present invention, comprise mechanical sextant, described mechanical sextant
Comprise pedestal, be provided with the index plate of horizontal glass, telescope, lever arm and arc on pedestal, one end of described lever arm is provided with index glass and is connected on the pedestal angle relative with index plate by the rotating shaft I, also comprise the appearance grid chi parallel with pedestal, blade one end of described appearance grid chi is connected on lever arm by the rotating shaft II, the vernier that holds the grid chi is connected on pedestal by the rotating shaft III, described rotating shaft III, horizontal glass and rotating shaft I are on same straight line, and described rotating shaft II equates with the distance of rotating shaft I with distance and the rotating shaft III of rotating shaft I; The vernier signal of described appearance grid chi is connected with the microprocessor I, and described microprocessor I is connected with the display screen I.
Reception of wireless signals module, Data Modulation module II, microprocessor II and computer communication interface that above-mentioned digital sextant coupling has reception terminal, described reception terminal to comprise to be connected successively.
Above-mentioned microprocessor I is connected with Data Modulation module I and wireless signal sending module, described wireless signal sending module and the wireless telecommunications of reception of wireless signals module.
Said base is connected with the digital processing box, and described microprocessor, Data Modulation module I, wireless signal sending module and display screen I are arranged in the digital processing box, on described digital processing box, are provided with button.
Be provided with the display screen II be connected with the microprocessor II on the housing of above-mentioned reception terminal.
The invention has the beneficial effects as follows: 1, realize the digitizing of mechanical sextant.Intersection angle changes the angle numerical value on the reading displayed device into by manually reading circular graduation, and microprocessor should be able to carry out digitized processing to mechanical angle.2, realized the automatic conversion of angle and start point distance.Digital sextant arranges preset parameter, storage, the computing function module in the start point distance formula, in measurement of angle, automatically calculates surveyed start point distance.3, realize the transmission of data, the start point distance data can be transferred in cabin quickly and easily, and can be received by reception terminal in cabin.4, interface circuit is set, is convenient to terminal and is connected with computing machine, realize the automatic collection of computing machine to terminal start point distance data.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structured flowchart of invention.
Fig. 3 is appearance grid chi use principle figure of the present invention.
Fig. 4 is measuring principle figure of the present invention.
Wherein: 1 pedestal, 2 horizontal glass, 3 rotating shaft III, 4 hold the blade of grid chi, and 5 hold the vernier of grid chi, 6 index plates, 7 rotating shaft II, 8 vernier adjustment knobs, 9 digital processing boxes, 10 telescopes, 11 index glass, 12 rotating shaft I, 13 lever arms.
Embodiment
As shown in Figure 1, 2, a kind of digital sextant of the present invention improves on the basis of original mechanical sextant, has realized digitizing, and it is more accurate to measure.
Specifically, comprise mechanical sextant, the machinery sextant comprises pedestal 1, is provided with the index plate 6 of horizontal glass 2, telescope 10, lever arm and arc on pedestal 1, and an end of lever arm 13 is provided with index glass 11 and is connected on pedestal 1 angle relative with index plate 6 by rotating shaft I 12.Increased appearance grid chi, holding the grid chi must be parallel with pedestal 1.Blade 4 one ends that hold the grid chi are connected on lever arm by rotating shaft II 7, the vernier 5 that holds the grid chi is connected on pedestal 1 by rotating shaft III 3, rotating shaft III 3, horizontal glass 2 and rotating shaft I 12 are on same straight line, and rotating shaft II 7 equates with the distance of rotating shaft I 12 with distance and the rotating shaft III 3 of rotating shaft I 12.Vernier 5 signals that hold the grid chi are connected with the microprocessor I, and the microprocessor I is connected with the display screen I.The resolution of holding the grid chi is 0.01mm.
In order conveniently to record measured data out, digital sextant coupling has the reception terminal, receives terminal and comprises reception of wireless signals module, Data Modulation module II, microprocessor II and the computer communication interface be connected successively.The microprocessor I is connected with Data Modulation module I and wireless signal sending module, wireless signal sending module and the wireless telecommunications of reception of wireless signals module.
Pedestal 1 is connected with digital processing box 9, and microprocessor, Data Modulation module I, wireless signal sending module and display screen I are arranged in digital processing box 9, on digital processing box 9, are provided with button.That structure is compacter, the convenient use.Be provided with the display screen II be connected with the microprocessor II on the housing of reception terminal.
Its principle of work is: as shown in Figure 3, mechanical sextant has been used for crossing of the place ahead two target A, B.Hold the grid chi intersection angle α is converted to chord length F, and gather its chord length length F.When intersection angle α changes, hold grid chi length and also change thereupon, intersection angle α and chord length F have one-to-one relationship.The distance of known rotating shaft II 7 and rotating shaft I 12 and rotating shaft III 3 equate with the distance of rotating shaft I 12 and are fixed length, can calculate according to Triangle Formula.The microprocessor I is used for reading chord length F, and is reduced into digital intersection angle α; According to prior preset start point distance formula zequin distance, the display screen I is sent to in result of calculation one tunnel according to intersection angle α, shows the start point distance of surveying; Data Modulation module I is sent on another road.Data Modulation module I is modulated the start point distance data of sending here, and data transmission is gone out with the 315M FM signal by the wireless signal sending module, and data wireless is delivered in cabin.The display screen I, for showing intersection angle and start point distance, shows K and b value while arranging for parameter in addition.
Receiving terminal is placed in cabin, and its reception of wireless signals module receives the start point distance data that the wireless signal sending module sends, by Data Modulation module II, electromagnetic wave is reduced, deliver to the microprocessor II, the microprocessor II obtains our required angle and start point distance data after data are further processed, one tunnel send display screen Ⅱ， mono-tunnel to be sent to computing machine through the computer communication interface.The display screen II is for showing intersection angle and start point distance numerical value.The computer communication interface is that single-chip microcomputer and Computer Data Communication arrange, for the data acquisition of computing machine.
The start point distance formula is as follows:
L?=?K*ctgα+b。
Wherein:
B---baseline and section intersection point are to the distance of start point distance between zero point;
α---the angle recorded;
The K---base length;
The start point distance that the L---digital sextant calculates.
As shown in Figure 4, set up front section mark C and rear section mark D point-blank on the bank, river, set up a long way off baseline mark E, the length of the baseline mark E front section mark C of distance and rear section mark D line is base length K, baseline and section intersection point be to the distance b of start point distance between zero point, the start point distance L that digital sextant calculates.Therefore K and b are known and are certain, and the data initialization button should be set, and to k and b, carry out preset.Digital processing box 9 is provided with 4 buttons, mode key, the key that replaces, put several keys, emission key.Press mode key, enter the preset parameter state.This state is COEFFICIENT K and the constant b arranged in vertical line start point distance computing formula.The microprocessor I just can calculate start point distance L according to the start point distance formula.
The measuring method of intersection angle is identical with mechanical sextant, by lever arm 13 and vernier adjustment knob 8, is adjusted, and reading of angle is different with it, directly reads the angle value of digital form on digital sextant display.The start point distance value needn't manually be calculated, and also directly on digital sextant display, reads.
General reply zero before using, method is: by power supply " ON " button that holds the grid chi, hold the start of grid chi, the button-type button, making to hold the grid chi is metric unit, the index arm of sextant is adjusted to 0 ° 00 ', by the return-to-zero button, make to hold the zero clearing of grid chi.If no longer press reset key or shift key, do not change battery, be not subject to strong-electromagnetic field and disturb, no longer zero clearing work of use later, hold grid chi permanent memory null position.And the power supply that holds the grid chi can not opened yet, and inside chip remains duty, unless taken out button cell, just hold the grid chi, really quit work.
The above is only the preferred implementation of this patent; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the art of this patent principle; can also make some improvement and replacement, these improvement and replacement also should be considered as the protection domain of this patent.
Claims (5)
1. a digital sextant, comprise mechanical sextant, described mechanical sextant comprises pedestal, be provided with horizontal glass on pedestal, telescope, the index plate of lever arm and arc, one end of described lever arm is provided with index glass and is connected on the pedestal angle relative with index plate by the rotating shaft I, it is characterized in that: also comprise the appearance grid chi parallel with pedestal, blade one end of described appearance grid chi is connected on lever arm by the rotating shaft II, the vernier that holds the grid chi is connected on pedestal by the rotating shaft III, described rotating shaft III, horizontal glass and rotating shaft I are on same straight line, described rotating shaft II equates with the distance of rotating shaft I with distance and the rotating shaft III of rotating shaft I, the vernier signal of described appearance grid chi is connected with the microprocessor I, and described microprocessor I is connected with the display screen I.
2. digital sextant according to claim 1 is characterized in that: reception of wireless signals module, Data Modulation module II, microprocessor II and computer communication interface that coupling has reception terminal, described reception terminal to comprise to be connected successively.
3. digital sextant according to claim 1, it is characterized in that: described microprocessor I is connected with Data Modulation module I and wireless signal sending module, described wireless signal sending module and the wireless telecommunications of reception of wireless signals module.
4. digital sextant according to claim 1, it is characterized in that: described pedestal is connected with the digital processing box, described microprocessor, Data Modulation module I, wireless signal sending module and display screen I are arranged in the digital processing box, on described digital processing box, are provided with button.
5. digital sextant according to claim 2, is characterized in that: be provided with the display screen II be connected with the microprocessor II on the housing of described reception terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310494032.7A CN103499333B (en) | 2013-10-21 | 2013-10-21 | Digital sextant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310494032.7A CN103499333B (en) | 2013-10-21 | 2013-10-21 | Digital sextant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103499333A true CN103499333A (en) | 2014-01-08 |
| CN103499333B CN103499333B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310494032.7A Expired - Fee Related CN103499333B (en) | 2013-10-21 | 2013-10-21 | Digital sextant |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627984A (en) * | 2016-03-08 | 2016-06-01 | 浙江海洋学院 | Sextant |
| CN106017405A (en) * | 2016-08-05 | 2016-10-12 | 四川汉星航通科技有限公司 | Self-reference sextant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968570A (en) * | 1973-07-09 | 1976-07-13 | Leuchter Jr Fred A | Electronic sextant |
| US4162124A (en) * | 1978-02-28 | 1979-07-24 | The United States Of America As Represented By The Secretary Of The Navy | Passive optical rangefinder-sextant |
| GB2062861A (en) * | 1979-11-02 | 1981-05-28 | Bevan N T J | Improved mariner's sextant |
| CN202748024U (en) * | 2012-05-04 | 2013-02-20 | 中国人民解放军镇江船艇学院 | Semi-automatic sextant |
| CN203489871U (en) * | 2013-10-21 | 2014-03-19 | 张广海 | Digital sextant |
-
2013
- 2013-10-21 CN CN201310494032.7A patent/CN103499333B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968570A (en) * | 1973-07-09 | 1976-07-13 | Leuchter Jr Fred A | Electronic sextant |
| US4162124A (en) * | 1978-02-28 | 1979-07-24 | The United States Of America As Represented By The Secretary Of The Navy | Passive optical rangefinder-sextant |
| GB2062861A (en) * | 1979-11-02 | 1981-05-28 | Bevan N T J | Improved mariner's sextant |
| CN202748024U (en) * | 2012-05-04 | 2013-02-20 | 中国人民解放军镇江船艇学院 | Semi-automatic sextant |
| CN203489871U (en) * | 2013-10-21 | 2014-03-19 | 张广海 | Digital sextant |
Non-Patent Citations (2)
| Title |
|---|
| 张广海，王学金，魏振: "SD-1数字六分仪研制", 《中国水文科技新发展》 * |
| 胡稳才，吴广华，黄丽卿: "航海电子六分仪测角传感系统研究", 《上海海运学院学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627984A (en) * | 2016-03-08 | 2016-06-01 | 浙江海洋学院 | Sextant |
| CN106017405A (en) * | 2016-08-05 | 2016-10-12 | 四川汉星航通科技有限公司 | Self-reference sextant |
| CN106017405B (en) * | 2016-08-05 | 2019-02-19 | 四川汉星航通科技有限公司 | One kind is from benchmark sextant |
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| Publication number | Publication date |
|---|---|
| CN103499333B (en) | 2015-06-03 |
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Granted publication date: 20150603 Termination date: 20181021 |