CN103895516A - Instrument system realizing electronic compass display and display method of instrument system - Google Patents
Instrument system realizing electronic compass display and display method of instrument system Download PDFInfo
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- CN103895516A CN103895516A CN201210585765.7A CN201210585765A CN103895516A CN 103895516 A CN103895516 A CN 103895516A CN 201210585765 A CN201210585765 A CN 201210585765A CN 103895516 A CN103895516 A CN 103895516A
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Abstract
The invention provides an instrument system realizing electronic compass display and a display method of the instrument system. The instrument system comprises a geographic information collecting module, a multimedia module, a gateway module, a combined instrument module and a display module. The display module is provided with a compass display interface. The combined instrument module generates compass display information according to road geographic information, vehicle speed and gear information and displays the compass display information in the compass display interface. The instrument system has the advantages that the azimuth, elevation, longitude, latitude information of a vehicle can be displayed through an electronic compass, drivers insensitive to directions or driving in complex geographic environments can timely learn about the current geographic information such as driving azimuth and elevation of the vehicle, and great convenience is brought to travelling. Meanwhile, the electronic compass does not need a sensor for sensing earth magnetic fields, and system is simplified while cost is lowered.
Description
Technical field
The present invention relates to instrument and show field, particularly a kind of meter system and display method thereof that realizes electronic compass demonstration.
Background technology
At present, in the instrument of general mechanically moving equipment, not realizing electronic compass shows, taking automobile as example, the existing auto meter display automobile speed of a motor vehicle, rotating speed and various fault-indicating lamp information and information in the process of moving, the geography information such as orientation that electronic compass display automobile does not travel, height above sea level, longitude, latitude, to the insensitive driver and crew of direction or while travelling, be difficult to distinguish the geography information such as orientation, height above sea level of automobile current driving for some in complicated geographical environment.
In addition, existing electronic compass is mainly to adopt sensor to survey earth magnetic field, and then judges self orientation.If adopt existing electronic compass to be integrated on auto meter, complexity and the cost of system will be increased.
Summary of the invention
The present invention is intended at least solve the technical matters existing in prior art, has proposed to special innovation a kind of meter system and display method thereof that electronic compass shows that realize.
In order to realize above-mentioned purpose of the present invention, according to a first aspect of the invention, the invention provides a kind of meter system that electronic compass shows of realizing, comprise geographical information collection module, multi-media module, gateway module, combination instrument module and display module, described geographical information collection module is connected with described multi-media module, and described geographical information collection module is used for gathering road geographic information and is transferred to described multi-media module; Described multi-media module is connected with described combination instrument module, and described multi-media module is for being transferred to described combination instrument module by road geographic information; Described gateway module is connected with described combination instrument module, and described gateway module is for detection of the speed of a motor vehicle and gear information and the described speed of a motor vehicle and gear information are transferred to described combination instrument module; Described combination instrument module is also connected with display module, described display module has compass display interface, and described combination instrument module generates compass according to described road geographic information and the speed of a motor vehicle and gear information and shows information and show at the compass display interface of described display module.
The present invention realizes meter system that electronic compass shows shows vehicle in real time orientation, height above sea level, longitude, latitude information according to road geographic information and the speed of a motor vehicle and gear information, when making some to the insensitive driver and crew of direction or travelling in complicated geographical environment, can understand in time the geography information such as orientation, height above sea level of travelling when vehicle in front, for trip provides very big convenience.Meanwhile, electronic compass of the present invention does not need to adopt sensor to survey earth magnetic field, in simplifying system, has reduced cost yet.
In a kind of preferred implementation of the present invention, described compass display interface comprises display space, is fixed on the vehicle body instruction icon at compass center and the compass around described compass central rotation; Described display space is used for showing that compass shows information, and described compass demonstration information comprises the information of height above sea level, orientation, longitude and latitude; The direction of described vehicle body instruction icon instruction Vehicle Driving Cycle; Described compass according to the size of described orientation values around compass central rotation.
Compass display interface of the present invention shows in real time the orientation of travelling, height above sea level, longitude, the latitude when vehicle in front, for navigating mate provides the geography information of real-time change, fully meets consumers' demand.
In another kind of preferred implementation of the present invention, also comprise memory module, described memory module is connected with described display module, and described display module is stored into described memory module by the compass demonstration information of its demonstration in the time moving back electricity.
Display module of the present invention is stored into memory module by the compass demonstration information of its demonstration in the time moving back electricity, and after meter system powers on, the initial information showing as compass display interface, facilitates driver and crew to understand the geography information such as orientation, height above sea level of travelling of vehicle.
In order to realize above-mentioned purpose of the present invention, according to a second aspect of the invention, the invention provides a kind of meter system display method that electronic compass shows that realizes, comprise the steps:
S1: meter system powers on, the compass display interface of display module shows initial information, described meter system is the meter system of realizing electronic compass demonstration described in claim 1,2 or 3;
S2: whether the road geographic information that judges the collection of geographical information collection module is effective, in the time that road geographic information is effective, execution step S3, in the time that road geographic information is invalid, described compass display interface continues to show initial information;
S3: when the speed of a motor vehicle is greater than threshold value and astern signal when invalid, combination instrument module generates compass demonstration information according to the speed of a motor vehicle of described road geographic information and gateway module detection and gear information, described compass display interface shows according to described compass demonstration information, when the speed of a motor vehicle is greater than threshold value and astern signal when effective, combination instrument module generates compass demonstration information according to the speed of a motor vehicle of described road geographic information and gateway module detection and gear information, orientation values in described compass demonstration information adds and after 180 °, is modified to the orientation values when vehicle in front, described compass display interface shows according to revised compass demonstration information, in the time that the speed of a motor vehicle is not more than threshold value, described compass display interface shows initial information.
Of the present inventionly realize the geography information such as orientation, height above sea level, longitude, latitude that meter system display method that electronic compass shows can show by electronic compass vehicle, when making some to the insensitive driver and crew of direction or travelling in complicated geographical environment, understand in time the geography information such as orientation, height above sea level of travelling when vehicle in front, for trip provides very big convenience.
In a kind of preferred implementation of the present invention, described compass demonstration information comprises the information of orientation, height above sea level, longitude and dimension, and described orientation is made up of direction and orientation values, and orientation values scope corresponding to described each direction is identical.
Compass demonstration information of the present invention comprises the orientation of travelling, height above sea level, longitude, the latitude of current vehicle, for navigating mate provides the detailed geography information of real-time change, fully meets consumers' demand.
In a kind of preferred implementation of the present invention, in described step S1, after meter system powers on, access memory module, in the time of successful access memory module, described initial information is the compass demonstration information that described display module is stored into described memory module in the time moving back electricity last time, and in the time can not accessing memory module, described initial information is default value.
In another kind of preferred implementation of the present invention, the default value of described initial information is: initial orientation: 0 °, north; Height above sea level: 0 meter; Longitude: 0 ° 0 '; Dimension: 0 ° 0 '.
The initial information that compass display interface of the present invention shows can be default value, also can be that the compass that was stored into memory module while moving back electricity last time shows information, after meter system powers on, initial information facilitates driver and crew to understand the geography information such as orientation, height above sea level of travelling of vehicle.In addition, the present invention, by the default value of initial information is set, has improved the fault-tolerance of meter system.
In a kind of preferred implementation of the present invention, when described compass rotation, first carry out buffered, the method of described buffered is: in the time that the absolute value of the difference of initial orientation and target bearing is greater than M and spends, described initial orientation is cumulative or extremely described target bearing of regressive taking M degree as unit, until the absolute value of the difference of described initial orientation and target bearing is less than M degree, in the process of cumulative or regressive, if accumulated value or regressive value exceed N while spending, described compass rotates once, wherein, described M is positive integer, and described N is the positive integer that is greater than M.
In another kind of preferred implementation of the present invention, the N of the minimum rotation unit degree of described compass, described N is the positive integer that is greater than M; The minimum unit of display in described orientation is 1 degree; The minimum unit of display of described height above sea level is 1 meter; The minimum unit of display of described longitude and latitude be 1 point of the present invention.
When compass rotation of the present invention, first carry out buffered, in the time that orientation accumulated value or regressive value exceed N and spend, compass rotates once, has avoided in the time of running car, do not stop shake because orientation changes the compass causing by a small margin, improved accurately in guarantee information the visibility showing simultaneously.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is the block diagram that the present invention realizes the meter system of electronic compass demonstration;
Fig. 2 is the diagram of circuit of realizing the meter system display method of electronic compass demonstration in a kind of preferred implementation of the present invention;
Fig. 3 is compass azimuth processing flow chart in a kind of preferred implementation of the present invention.
Reference numeral:
1 geographical information collection module; 2 multi-media modules; 3 combination instrument modules; 4 gateway modules;
5 display modules.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " longitudinally ", " laterally ", " on ", orientation or the position relationship of the instruction such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The invention provides a kind of meter system that electronic compass shows of realizing, as shown in Figure 1, this meter system comprises geographical information collection module 1, multi-media module 2, gateway module 4, combination instrument module 3 and display module 5, in one embodiment of the invention, display module 5 is liquid crystal display display module.Wherein, geographical information collection module 1 is connected with multi-media module 2, this geographical information collection module 1 is for gathering road geographic information and being transferred to multi-media module 2, in the present embodiment, geographical information collection module 1 can be any module that can gather road geographic information, is specifically as follows but is not limited to GPS module.Multi-media module 2 is connected with combination instrument module 3, and this multi-media module 2 is for being transferred to road geographic information combination instrument module 3.Gateway module 4 is connected with combination instrument module 3, and this gateway module 4 is for detection of the speed of a motor vehicle and gear information and the speed of a motor vehicle and gear information are transferred to described combination instrument module 3.Combination instrument module 3 is also connected with display module 5, and this display module 5 has compass display interface, and combination instrument module 3 generates compass according to road geographic information and the speed of a motor vehicle and gear information and shows information and show at the compass display interface of display module 5.
In the present embodiment, geographical information collection module 1 gathers road geographic information in vehicle traveling process, this road geographic information includes orientation, height above sea level, longitude and latitude information, geographical information collection module 1 sends to multi-media module 2 in real time by serial ports, multi-media module 2 receives orientation, height above sea level, longitude, latitude information by serial ports, sends to combination instrument module 3 by CAN bus.Gateway module 4 detects the speed of a motor vehicle and shift signal and by CAN bus, the speed of a motor vehicle and shift signal is sent to combination instrument module 3.Combination instrument module 3, according to the speed of a motor vehicle receiving and shift signal and road geographic information generation compass demonstration information, sends to display module 5 by IIC communication generating compass demonstration information, realizes electronic compass and shows.
In the present embodiment, compass display interface comprises display space, is fixed on the vehicle body instruction icon at compass center and the compass around compass central rotation.Wherein, display space is used for showing that compass shows information, and compass demonstration information comprises the information of height above sea level, orientation, longitude and latitude, the road geographic information real-time change that demonstration information gathers according to geographical information acquisition module 1.Vehicle body instruction icon is used to indicate the direction of Vehicle Driving Cycle, and this vehicle body indicates the region that represents headstock in icon to fix forward all the time, and the orientation of headstock instruction is the orientation of current Vehicle Driving Cycle.Compass is around compass central rotation, and the size of the compass anglec of rotation is determined by the size of vehicle heading value.
In the other preferred implementation of the present invention, this meter system also comprises memory module (not shown), this memory module is connected with display module 5, display module 5 is stored into memory module by the compass demonstration information of its demonstration in the time moving back electricity, after meter system powers on, the initial information that canned data shows as compass display interface.
Meter system of the present invention stronghold road geographic information and the speed of a motor vehicle and gear information show the information such as the orientation, height above sea level, longitude, latitude of vehicle in real time, for some to the insensitive driver and crew of direction or while travelling in complicated geographical environment, understand in time the geography information such as orientation, height above sea level of travelling when vehicle in front, for trip provides very big convenience.Meanwhile, electronic compass of the present invention does not need to adopt sensor to survey earth magnetic field, in simplifying system, has reduced cost yet.
The present invention also provides a kind of meter system display method that electronic compass shows that realizes, and as shown in Figure 2, comprises the steps:
Step S1, meter system powers on, and the compass display interface of display module 5 shows initial information.In a kind of preferred implementation of the present invention, after meter system powers on, first access memory module, in the time of successful access memory module, initial information is the compass demonstration information that display module 5 is stored into memory module in the time moving back electricity last time, in the time can not accessing memory module, initial information is default value.In a kind of embodiment being more preferably of the present invention, the default value of initial information is initial orientation: 0 °, north; Height above sea level: 0 meter; Longitude: 0 ° 0 '; Dimension: 0 ° 0 '.The initial information that compass display interface of the present invention shows can be default value, also can be that the compass that was stored into memory module while moving back electricity last time shows information, after meter system powers on, initial information facilitates driver and crew to understand the geography information such as orientation, height above sea level of travelling of vehicle.In addition, the present invention, by the default value of initial information is set, has improved the fault-tolerance of meter system.
Step S2, judge that whether the road geographic information that geographical information collection module 1 gathers is effective, in the present embodiment, concrete determination methods is: after geographical information acquisition module 1 initialization completes, it gathers road geographic information and road geographic information is sent to combination instrument module 3 by multi-media module 2, if this road geographic information within the scope of the information processing of combination instrument module 3 and also, in the indication range of electronic compass, judges that this road geographic information is as effective information; If this geographical information collection module 1 initialization does not complete, or the road geographic information of its collection is not within the scope of the information processing of combination instrument module 3 or not in the indication range of electronic compass, judges that this road geographic information is as invalid information.In the time that geographical information acquisition module 1 initialization does not complete, geographical information collection module 1 can be sent information invalid flag position to combination instrument module 3, and this information invalid flag position can show on display module 5, plays the effect of reminding driver and crew.In the time that road geographic information is effective, execution step S3, in the time that road geographic information is invalid, compass display interface continues to show initial information.In a kind of preferred implementation of the present invention, first judge in p second that to be that combination instrument module 3 is no receive the road geographic information that geographical information collection module 1 gathers, in the time not receiving the road geographic information that geographical information collection module 1 gathers, compass display interface continues to show initial information, in the time receiving the road geographic information that geographical information collection module 1 gathers, judge that whether the road geographic information that geographical information collection module 1 gathers is effective, in the time that road geographic information is effective, execution step S3, in the time that road geographic information is invalid, compass display interface continues to show initial information.In the present embodiment, p is 5.
Step S3, when the speed of a motor vehicle is greater than threshold value and astern signal when invalid, the speed of a motor vehicle that combination instrument module 3 detects according to road geographic information and gateway module 4 and gear information generate compass and show information, and compass display interface shows according to compass demonstration information.When the speed of a motor vehicle is greater than threshold value and astern signal when effective, the speed of a motor vehicle that combination instrument module 3 detects according to road geographic information and gateway module 4 and gear information generate compass and show information, orientation values in compass demonstration information adds after 180 ° and is modified to the orientation values when vehicle in front, and compass display interface shows according to revised compass demonstration information.In the time that the speed of a motor vehicle is not more than threshold value, compass display interface shows initial information.In the present embodiment, threshold value is 2,000 ms/h.
In the present embodiment, compass demonstration information comprises the information of orientation, height above sea level, longitude and dimension, and wherein, orientation is made up of direction and orientation values, as shown in table 1, and orientation values scope corresponding to each direction is identical, is 45 degree.
The orientation values scope that each direction of table 1. is corresponding
| Direction | Orientation values | Direction | Orientation values |
| North | 22~338° | South | 158~202° |
| Northeast | 23~67° | Southwest | 203~247° |
| East | 68~112° | West | 248~292° |
| The southeast | 113~157° | Northwest | 293~337° |
In the present embodiment, the N of the minimum rotation unit degree of compass, the minimum unit of display in orientation is 1 degree; The minimum unit of display of height above sea level is 1 meter; The minimum unit of display of longitude and latitude is 1 point, the demonstration precision of information of compass.
In a kind of preferred implementation of the present invention, as shown in Figure 3, when display module 5 receives after compass demonstration information, first judge the poor of target bearing and initial orientation, in the time that target bearing equals initial orientation, the Information invariability that compass display interface shows, compass does not rotate.
When the absolute value of the difference of target bearing and initial orientation is not more than 180 while spending, judge whether the absolute value of the difference of target bearing and initial orientation is greater than M degree, if be greater than M degree, carry out buffered; If be not more than M degree, target bearing be assigned to initial orientation and show at compass display interface.
When the difference of target bearing and initial orientation is greater than 180 while spending, if target bearing is less than initial orientation, judge whether the absolute value of the difference of target bearing and initial orientation is greater than M degree, if be greater than M degree, carry out buffered; If be not more than M degree, target bearing be assigned to initial orientation and show at compass display interface; If target bearing is greater than initial orientation, judge whether initial orientation is not less than M degree, if initial orientation is not less than M degree, carry out buffered, in the process of buffered, if current orientation is less than M degree, make degree-M degree+current orientation, current orientation=360, judge whether the absolute value of the difference in target bearing and current orientation is greater than M degree, if be greater than M degree, proceed buffered, if be not more than M degree, target bearing be assigned to initial orientation and show at compass display interface.
When the difference of initial orientation and target bearing is greater than 180 while spending, if target bearing is greater than initial orientation, whether the absolute value that judges the difference of target bearing and initial orientation is greater than M degree, if be greater than M degree, carry out buffered, if be not more than M degree, target bearing be assigned to initial orientation and show at compass display interface; If target bearing is less than initial orientation, carry out buffered, in the process of buffered, if current orientation is greater than 360 degree, make current orientation=current orientation-360 degree, judge whether the absolute value of the difference in target bearing and current orientation is greater than M degree, if be greater than M degree, proceed buffered, if be not more than M degree, target bearing be assigned to initial orientation and show at compass display interface.Wherein, current orientation is the changing value of initial orientation in buffered process.
In the present embodiment, when compass rotation, first carry out buffered, the method of buffered is: in the time that the absolute value of the difference of initial orientation and target bearing is greater than M and spends, initial orientation taking M degree as unit cumulative or regressive to target bearing, until the absolute value of the difference of initial orientation and target bearing is less than M degree.In the process of cumulative or regressive, if accumulated value or regressive value exceed N while spending, compass rotates once.M is positive integer, and N is the positive integer that is greater than M, and in the present embodiment, M is that 4, N is 10.When compass of the present invention rotation, first carry out buffered, in the time that orientation accumulated value or regressive value exceed N and spend, compass rotates once, has avoided in the time of running car, does not stop shake because orientation changes the compass causing by a small margin, has improved the visibility of demonstration.Consider to human natureization of the present invention that navigating mate, in orientation, height above sea level, longitude, the insensitive situation of latitude, may occur that travel direction mistake causes the place that departs from objectives.The present invention increases electronic compass Presentation Function on existing full liquid crystal instrument display base, by gathering current vehicle speed, gear and road geographic information, the information exchanges such as the orientation of current running car, height above sea level, longitude, latitude are crossed to electronic compass to be shown in real time, be convenient to chaufeur and understand in time current geography information, fully meet consumers' demand, for trip provides very big convenience.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. realize the meter system that electronic compass shows, it is characterized in that, comprising: geographical information collection module, multi-media module, gateway module, combination instrument module and display module,
Described geographical information collection module is connected with described multi-media module, and described geographical information collection module is used for gathering road geographic information and is transferred to described multi-media module;
Described multi-media module is connected with described combination instrument module, and described multi-media module is for being transferred to described combination instrument module by road geographic information;
Described gateway module is connected with described combination instrument module, and described gateway module is for detection of the speed of a motor vehicle and gear information and the described speed of a motor vehicle and gear information are transferred to described combination instrument module;
Described combination instrument module is also connected with display module, described display module has compass display interface, and described combination instrument module generates compass according to described road geographic information and the speed of a motor vehicle and gear information and shows information and show at the compass display interface of described display module.
2. the meter system of realizing electronic compass demonstration as claimed in claim 1, is characterized in that, described compass display interface comprises display space, is fixed on the vehicle body instruction icon at compass center and the compass around described compass central rotation; Described display space is used for showing that compass shows information, and described compass demonstration information comprises the information of height above sea level, orientation, longitude and latitude; The direction of described vehicle body instruction icon instruction Vehicle Driving Cycle; Described compass according to the size of described orientation values around described compass central rotation.
3. the meter system of realizing electronic compass demonstration as claimed in claim 1, it is characterized in that, also comprise memory module, described memory module is connected with described display module, and described display module is stored into described memory module by the compass demonstration information of its demonstration in the time moving back electricity.
4. realize the meter system display method that electronic compass shows, it is characterized in that, comprise the steps:
S1: meter system powers on, the compass display interface of display module shows initial information, described meter system is the meter system that electronic compass shows of realizing described in any one of claim 1-2;
S2: whether the road geographic information that judges the collection of geographical information collection module is effective, in the time that road geographic information is effective, execution step S3, in the time that road geographic information is invalid, described compass display interface continues to show initial information;
S3: when the speed of a motor vehicle is greater than threshold value and astern signal when invalid, combination instrument module generates compass demonstration information according to the speed of a motor vehicle of described road geographic information and gateway module detection and gear information, described compass display interface shows according to described compass demonstration information
When the speed of a motor vehicle is greater than threshold value and astern signal when effective, combination instrument module generates compass demonstration information according to the speed of a motor vehicle of described road geographic information and gateway module detection and gear information, orientation values in described compass demonstration information adds and after 180 °, is modified to the orientation values when vehicle in front, described compass display interface shows according to revised compass demonstration information
In the time that the speed of a motor vehicle is not more than threshold value, described compass display interface shows initial information.
5. the meter system display method that realizes electronic compass demonstration as claimed in claim 4, it is characterized in that, described compass demonstration information comprises the information of orientation, height above sea level, longitude and latitude, and described orientation is made up of direction and orientation values, and orientation values scope corresponding to described each direction is identical.
6. the meter system display method that realizes electronic compass demonstration as claimed in claim 4, it is characterized in that, described meter system is the meter system that electronic compass shows of realizing claimed in claim 3, in described step S1, after meter system powers on, access memory module, in the time of successful access memory module, described initial information is the compass demonstration information that described display module is stored into described memory module in the time moving back electricity last time, and in the time can not accessing memory module, described initial information is default value.
7. the meter system display method that realizes electronic compass demonstration as claimed in claim 6, is characterized in that, the default value of described initial information is: initial orientation: 0 °, north; Height above sea level: 0 meter; Longitude: 0 ° 0 '; Dimension: 0 ° 0 '.
8. the meter system display method that realizes electronic compass demonstration as claimed in claim 4, is characterized in that, described compass display interface comprises display space, is fixed on the vehicle body instruction icon at compass center and the compass around described compass central rotation; Described display space is used for showing that compass shows information; The direction of described vehicle body instruction icon instruction Vehicle Driving Cycle; Described compass according to the size of described orientation values around compass central rotation.
9. the meter system display method that realizes electronic compass demonstration as claimed in claim 8, is characterized in that, when described compass rotation, first carries out buffered, and the method for described buffered is:
In the time that the absolute value of the difference of initial orientation and target bearing is greater than M and spends, described initial orientation is cumulative or extremely described target bearing of regressive taking M degree as unit, until the absolute value of the difference of described initial orientation and target bearing is less than M degree, in the process of cumulative or regressive, if accumulated value or regressive value exceed N while spending, described compass rotates once, wherein, described M is positive integer, and described N is the positive integer that is greater than M.
10. the meter system display method that realizes electronic compass demonstration as described in claim 5 or 9, is characterized in that, the N of the minimum rotation unit degree of described compass, and described N is the positive integer that is greater than M; The minimum unit of display in described orientation is 1 degree; The minimum unit of display of described height above sea level is 1 meter; The minimum unit of display of described longitude and latitude is 1 point.
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| CN106427577A (en) * | 2016-12-15 | 2017-02-22 | 李克 | Three-combined-meter convoying instrument |
| CN106427577B (en) * | 2016-12-15 | 2019-03-08 | 李克 | Three table convoy instrument |
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