CN103499333B - Digital sextant - Google Patents
Digital sextant Download PDFInfo
- Publication number
- CN103499333B CN103499333B CN201310494032.7A CN201310494032A CN103499333B CN 103499333 B CN103499333 B CN 103499333B CN 201310494032 A CN201310494032 A CN 201310494032A CN 103499333 B CN103499333 B CN 103499333B
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- CN
- China
- Prior art keywords
- rotating shaft
- sextant
- digital
- microprocessor
- pedestal
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- 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.)
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Classifications
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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
Current use is surveyed ship and is carried out in the test of water sand, and the method that the measurement of start point distance is conventional has several as follows: one, section notation, builds mark rope (cableway), according to sign board determination vertical line start point distance; Two, GPS positioning system carries out start point distance measurement, sets up GPS network, 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 uses mechanical sextant to carry out the measurement of vertical line start point distance, survey the main test instrument that boat measurement tests start point distance measurement at present, it possesses measures fast, use simple, cheap, the features such as failure rate is low are the irreplaceable test device of other modernization distance mearuring equipment.But mechanical sextant carries out start point distance measures the part that also comes with some shortcomings: 1, can only read intersection angle (calibration disc type), often spend spacing and be about 1mm, reading is comparatively difficult, sometimes error in reading may be there is, and the number of degrees and mark will read in different positions, then synthesize angle, reading bothers very much; 2, to survey data be intersection angle, be not the start point distance data needed for us, just need can obtain vertical line start point distance numerical value by manually carrying out calculating (or tabling look-up), bringing unnecessary trouble; 3, the information of sextant observation is not numerical information, by computer recognizing, can not cannot realize the data communication between sextant and computing machine, hinder the development of computing machine Enterprise model, process.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of labour intensity alleviating test personnel, improving the digital sextant of test device automatization level.
The present invention is achieved by the following measures:
A kind of digital sextant of the present invention, comprises mechanical sextant, described mechanical sextant
Comprise pedestal, pedestal is provided with the index plate of horizontal glass, telescope, 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 rotating shaft I, also comprise the appearance grid chi with base parallel, blade one end of described appearance grid chi is connected on lever arm by rotating shaft II, the vernier holding grid chi is connected on pedestal by rotating shaft III, on the same line, described rotating shaft II is equal with the distance of rotating shaft I with the Distance geometry rotating shaft III of rotating shaft I for described rotating shaft III, horizontal glass and rotating shaft I; The vernier signal of described appearance grid chi is connected with microprocessor I, and described microprocessor I is connected with display screen I.
Above-mentioned digital sextant coupling has reception terminal, and described reception terminal comprises the reception of wireless signals module, data modulation module II, microprocessor II and the computer communication interface that are 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 digital processing box, and described microprocessor, data modulation module I, wireless signal sending module and display screen I are arranged in digital processing box, and described digital processing box is provided with button.
The housing of above-mentioned reception terminal is provided with the display screen II be connected with microprocessor II.
The invention has the beneficial effects as follows: the digitizing 1, realizing mechanical sextant.Intersection angle changes angular values on reading displayed device into by manually reading circular graduation, and microprocessor should be able to carry out digitized processing to mechanical angle.2, the automatic conversion of angle and start point distance is achieved.Digital sextant arranges preset parameter in start point distance formula, storage, computing function module, while measurement of angle, automatically calculates surveyed start point distance.3, realize the transmission of data, start point distance data can be transferred in cabin quickly and easily, and can be received terminal reception 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.
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, the blade of grid chi is held in 3 rotating shafts III, 4, the vernier of 5 appearance grid chis, 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, the basis of original mechanical sextant is improved, achieves digitizing, and it is more accurate to measure.
Specifically, comprise mechanical sextant, machinery sextant comprises pedestal 1, and pedestal 1 is provided with the index plate 6 of horizontal glass 2, telescope 10, lever arm and arc, one 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.Add and hold grid chi, holding grid chi must be parallel with pedestal 1.Blade 4 one end holding grid chi is connected on lever arm by rotating shaft II 7, the vernier 5 holding grid chi is connected on pedestal 1 by rotating shaft III 3, on the same line, rotating shaft II 7 is equal with the distance of rotating shaft I 12 with the Distance geometry rotating shaft III 3 of rotating shaft I 12 for rotating shaft III 3, horizontal glass 2 and rotating shaft I 12.Vernier 5 signal holding grid chi is connected with microprocessor I, and microprocessor I is connected with display screen I.The resolution holding grid chi is 0.01mm.
Conveniently data out measured by record, digital sextant coupling has reception terminal, receives terminal and comprises the reception of wireless signals module, data modulation module II, microprocessor II and the computer communication interface that are connected successively.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, and digital processing box 9 is provided with button.That structure is compacter, easy to use.The housing of reception terminal is provided with the display screen II be connected with microprocessor II.
Its principle of work is: as shown in Figure 3, and mechanical sextant is for completing front two target A, the crossing of B.Hold grid chi and 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 has one-to-one relationship.Known rotating shaft II 7 is equal with the distance of rotating shaft I 12 with the Distance geometry rotating shaft III 3 of rotating shaft I 12 and be fixed length, can calculate according to Triangle Formula.Microprocessor I for reading chord length F, and is reduced into digital intersection angle α; According to intersection angle α according to start point distance formulae discovery start point distance preset in advance, display screen I is sent on result of calculation one tunnel, display survey start point distance; Data modulation module I is sent on another road.Data modulation module I modulates the start point distance data sent here, and data is launched with 315M FM signal by wireless signal sending module, is delivered in cabin by data wireless.Display screen I for showing intersection angle and start point distance, in addition for showing K and b value during optimum configurations.
Receiving terminal is placed in cabin, and its reception of wireless signals module receives the start point distance data that wireless signal sending module sends, reduced by data modulation module II pair of electromagnetic wave, deliver to microprocessor II, microprocessor II obtains angle needed for us and start point distance data after data are processed further, display screen II is sent on one tunnel, and computing machine is sent to through computer communication interface in a road.Display screen II is for showing intersection angle and start point distance numerical value.Computer communication interface is that single-chip microcomputer and Computer Data Communication are arranged, for the data acquisition of computing machine.
Start point distance formula is as follows:
L = K*ctgα+b。
Wherein:
Distance between b---baseline and section intersection point to start point distance zero point;
α---the angle recorded;
K---base length;
The start point distance that L---digital sextant calculates.
As shown in Figure 4, section mark C and rear section mark D is point-blank set up on bank, river, set up baseline mark E a long way off, baseline mark E is base length K apart from the length of front section mark C and rear section mark D line, distance b between baseline and section intersection point to start point distance zero point, the start point distance L that digital sextant calculates.Therefore K and b is known and is certain, answers setting data preset button, carries out preset to k and b.Digital processing box 9 is provided with 4 buttons, namely mode key, the key that replaces, put several key, emission key.By mode key, enter preset parameter state.This state arranges COEFFICIENT K in vertical line start point distance computing formula and constant b.Microprocessor I just can calculate start point distance L according to start point distance formula.
The measuring method of intersection angle is identical with mechanical sextant, is adjusted by lever arm 13 and vernier adjustment knob 8, and the reading of angle is different with it, and digital sextant display directly reads the angle value of digital form.Start point distance value need not manually calculate, and also directly reads on digital sextant display.
Generally tackle zero before the use, method is: press power supply " ON " button holding grid chi, and hold the start of grid chi, button-type button, makes appearance grid chi be metric unit, the index arm of sextant is adjusted to 0 ° 00 ', by zero reset button, appearance grid chi is reset.If no longer press reset key or shift key, do not change battery, be not subject to strong-electromagnetic field interference, use later and no longer can reset work, hold grid chi permanent memory null position.And the power supply holding grid chi also can not be opened, and inside chip remains duty, unless taken out button cell, really quit work just hold grid chi.
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 not departing from the art of this patent principle; can also make some improvement and replacement, these improve and replace the protection domain that also should be considered as this patent.
Claims (5)
1. a digital sextant, comprise mechanical sextant, described mechanical sextant comprises pedestal, pedestal is provided with horizontal glass, telescope, the index plate of lever arm and arc, one end of described lever arm is connected on the pedestal relative with index plate by rotating shaft I, and the end of lever arm is connected with index glass, it is characterized in that: also comprise the appearance grid chi with base parallel, blade one end of described appearance grid chi is connected on lever arm by rotating shaft II, the vernier holding grid chi is connected on pedestal by rotating shaft III, described rotating shaft III, horizontal glass and rotating shaft I are on the same line, described rotating shaft II is equal with the distance of rotating shaft I with the Distance geometry rotating shaft III of rotating shaft I, the vernier signal of described appearance grid chi is connected with microprocessor I, and described microprocessor I is connected with display screen I.
2. according to digital sextant described in claim 1, it is characterized in that: this digital sextant coupling has reception terminal, and described reception terminal comprises the reception of wireless signals module, data modulation module II, microprocessor II and the computer communication interface that are connected successively.
3. according to digital sextant described in 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. according to digital sextant described in claim 1, it is characterized in that: described pedestal is connected with digital processing box, described microprocessor, data modulation module I, wireless signal sending module and display screen I are arranged in digital processing box, and described digital processing box is provided with button.
5. according to digital sextant described in claim 2, it is characterized in that: the housing of described reception terminal is provided with the display screen II be connected with microprocessor II.
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 CN103499333A (en) | 2014-01-08 |
| CN103499333B true CN103499333B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310494032.7A Expired - Fee Related CN103499333B (en) | 2013-10-21 | 2013-10-21 | Digital sextant |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627984A (en) * | 2016-03-08 | 2016-06-01 | 浙江海洋学院 | 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 |
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》.2012,458-463. * |
| 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》.2002,第23卷(第3期),17-20. * |
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| CN103499333A (en) | 2014-01-08 |
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Granted publication date: 20150603 Termination date: 20181021 |
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