CN203572966U - Beidou and GPS satellite double-module navigation system - Google Patents
Beidou and GPS satellite double-module navigation system Download PDFInfo
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- CN203572966U CN203572966U CN201320494959.6U CN201320494959U CN203572966U CN 203572966 U CN203572966 U CN 203572966U CN 201320494959 U CN201320494959 U CN 201320494959U CN 203572966 U CN203572966 U CN 203572966U
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Abstract
The utility model discloses a Beidou and GPS satellite double-module navigation system, and the system comprises a double-module antenna, a satellite searching module, a navigation map, a voice output unit, and a display touch unit. The satellite searching module comprises a low-noise amplifier, a digital processing base band circuit, and a central processor. The digital processing base band circuit communicates and is connected with the central processor through a serial port. The low-noise amplifier is electrically connected with the digital processing base band circuit sequentially through a band-pass filter and a frequency-mixing circuit. The band-pass filter and the frequency-mixing circuit are divided into two ways for processing. The system provided by the utility model is based on the national security, our country strives to develop the Beidou, and the system can be used in different situations through the switching among three navigation states, thereby greatly improving the accuracy. The GPS mode can remedy the defects in satellite search of the Beidou. A mode of combining the GPS with the Beidou can enable satellite searching signals of the GPS and the Beidou to be compared with each other, so as to obtain more accurate position information. The Beidou navigation can be directly used in emergency or normal conditions.
Description
Technical field
The utility model relates to vehicle mounted guidance field, is specifically related to a kind of Big Dipper and gps satellite navigational system.
Background technology
Current automobile multimedia navigation system is domestic is all GPS single mode, but in the use of GPS, its precision is subject to certain control, and on State-level, for national security, development dipper system is necessary, and for supporting national Big Dipper navigation cause, national government proposes will progressively expand the plan of using the Big Dipper navigation coming years.But the big-dipper satellite number that our country launches at present very little, cause the Big Dipper sometimes to receive star effect not ideal, so in civil area, the utilization rate of Big Dipper navigation all remains at low levels always, now the solution of part be when Big Dipper navigation is set again a built-in GPS chip assist, because the receive frequency of two systems is not identical, in order to distinguish this two kinds of signals, the patent No. is 201210398693.5 to disclose the mode that a kind of signal separates, it carries out mixing after by bimodulus receiving antenna receiving satellite signal, pass through again Big Dipper wave filter, the filtering respectively of GPS wave filter, and then draw corresponding signal frequency range and be input to and search in star module, in this process, due to needs mixing and then filtering, the signal finally drawing will have certain decay, if this part decay is original with regard in not too strong at the signal receiving, determined cannot receive enough strong signal and process this signal and be presented on map, and this operates in outside and watches and cannot know, this just allows the probability of originally searching the normal use of the less-than-ideal dipper system of star effect further reduce.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of system of double mode navigation easy to use, and it can make up and improve the drawback that satellite-signal cannot receive in some cases.
The technical scheme of the utility model technical solution problem is as follows:
A kind of Big Dipper and gps satellite bimodulus navigational system, comprise dual-mode antenna, search star module, navigation map, voice output unit and demonstration touch unit, the described star module of searching comprises low noise amplifier, digital processing baseband circuit and central processing unit, described digital processing baseband circuit is by catching, follow the tracks of and positioning calculation, process and obtain longitude and latitude and elevation information, digital processing baseband circuit and central processing unit are by serial ports connecting communication, described central processing unit connects described demonstration touch unit and ground graph card, described low noise amplifier passes through bandpass filter successively, mixting circuit is electrically connected with described digital processing baseband circuit, bandpass filter, mixting circuit and digital processing baseband circuit are divided into the Big Dipper and the processing of GPS two-way, described bandpass filter is divided GPS bandpass filter and Big Dipper bandpass filter, described mixting circuit divides Big Dipper mixting circuit and GPS mixting circuit, described digital processing baseband circuit comprises GPS digital processing baseband chip and Big Dipper digital processing baseband chip.Further, described Big Dipper mixting circuit and GPS mixting circuit are exported respectively 4MHz intermediate-freuqncy signal.
As to the further describing of the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described demonstration touch unit arranges mode switch button, and mode switch button is by showing that touch unit is to central processing unit input pattern switching signal.
As to the further describing of the above-mentioned Big Dipper and gps satellite bimodulus navigational system, the time clock pin that GPS digital processing baseband chip and Big Dipper digital processing baseband chip receive satellite pulse signal is provided with light emitting diode.
As further describing the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described GPS digital processing baseband chip is connected with the serial communication end of central processing unit respectively with transmission data pin (TXD1) with the reception data pin (RXD1) of Big Dipper digital processing baseband chip, and central processing unit switches the pattern of using by the reception data pin sending mode switching signal to two chips.
As the further description to the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described pattern can be according to circumstances, switches to three kinds of patterns that GPS or the Big Dipper or GPS are combined with the Big Dipper.
The beneficial effects of the utility model are: GPS navigation system is take 24, whole world location artificial satellite as basis, a kind of radio-navigation positioning system that the information such as three-dimensional position, three-dimensional velocity are provided to all parts of the world round-the-clockly, civilian positioning precision can reach in 10 meters.For Big Dipper navigation, " Big Dipper " has location and the double action of communicating by letter, and the SMS communication function possessing is exactly that GPS is not available.12 meter of " Big Dipper " positioning precision, adopts receiving terminal not need to lay ground base station, and the ship at disaster center just can send information one second.Because GPS and the Big Dipper have self advantage separately, based on national security, consider, China is just greatly developing Big Dipper cause, the utility model, by switching three navigational states, under different situations, has improved its accuracy rate greatly, GPS pattern can make up the Big Dipper and search the less-than-ideal situation of star, and the pattern that GPS is combined with the Big Dipper can be got both star signals of searching and contrasted, draw more accurate positional information, in emergency condition or normal condition is next uses Big Dipper navigation.In order to solve both signal Receiver Problems, in this system and disposal route, first low noise amplifier amplifying signal is passed through respectively to GPS wave filter and Big Dipper wave filter separating filtering, obtain two kinds of different signals, the loss of signal during due to mixing is comparatively little, thereby in this filtering, can preferentially judge filtered signal and whether enough can carry out by force Frequency mixing processing, compare the mixing process of filtering again, the processing progress that can more preferentially know signal, obtains the understanding of signal acquisition state in time.
Accompanying drawing explanation
Fig. 1 is principles of signal processing figure of the present utility model;
Fig. 2 is the circuit theory diagrams of the utility model linking number word processing baseband chip.
Embodiment
Below in conjunction with accompanying drawing 1～accompanying drawing 2, further illustrate the utility model.
A kind of Big Dipper described in the utility model and gps satellite bimodulus navigational system, comprise dual-mode antenna, search star module, navigation map, voice output unit and demonstration touch unit, the described star module of searching comprises low noise amplifier, digital processing baseband circuit and central processing unit, described digital processing baseband circuit is by catching, follow the tracks of and positioning calculation, process and obtain longitude and latitude and elevation information, digital processing baseband circuit and central processing unit are by serial ports connecting communication, described central processing unit connects described demonstration touch unit and ground graph card, described low noise amplifier passes through bandpass filter successively, mixting circuit is electrically connected with described digital processing baseband circuit, bandpass filter, mixting circuit and digital processing baseband circuit are divided into the Big Dipper and the processing of GPS two-way, described bandpass filter is divided GPS bandpass filter and Big Dipper bandpass filter, described mixting circuit divides Big Dipper mixting circuit and GPS mixting circuit, described digital processing baseband circuit comprises GPS digital processing baseband chip and Big Dipper digital processing baseband chip.Further, described Big Dipper mixting circuit and GPS mixting circuit are exported respectively 4MHz intermediate-freuqncy signal.
As to the further describing of the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described demonstration touch unit arranges mode switch button, and mode switch button is by showing that touch unit is to central processing unit input pattern switching signal.
As further describing the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described GPS digital processing baseband chip is connected with the serial communication end of central processing unit respectively with transmission data pin (TXD1) with the reception data pin (RXD1) of Big Dipper digital processing baseband chip, and central processing unit completes by the reception data pin sending mode switching signal to two chips the process of using chip of switching.
As the further description to the above-mentioned Big Dipper and gps satellite bimodulus navigational system, described pattern can be according to circumstances, switches to three kinds of patterns that GPS or the Big Dipper or GPS are combined with the Big Dipper.Due to the region problem of part, and the factor such as political factor, although the degree of accuracy of GPS is higher, its stability is influenced larger, at some, can not use GPS, can not search out big-dipper satellite or positioning precision inadequate in the situation that, can satisfy the demands by switching use pattern.On switching arranges, because mode switch button is directly used serial communication, its handoff procedure is simple and convenient, and the scheme of its enforcement is also more direct simple.
As to the further describing of the above-mentioned Big Dipper and gps satellite bimodulus navigational system, the time clock pin that GPS digital processing baseband chip and Big Dipper digital processing baseband chip receive satellite pulse signal is provided with LED-ORG.Satellite pulse signal was outwards launched PPS signal every one second, LED-ORG receives the voltage signal that this pulse signal is corresponding and realizes glittering effect, thereby can recognize more intuitively the situation of receiving satellite signal.
Above embodiment is just explanation rather than restriction the utility model, and the equivalence of doing according to the method described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (6)
1. the Big Dipper and gps satellite bimodulus navigational system, comprise dual-mode antenna, search star module, navigation map, voice output unit and demonstration touch unit, the described star module of searching comprises low noise amplifier, digital processing baseband circuit and central processing unit, described digital processing baseband circuit is by catching, follow the tracks of and positioning calculation, process and obtain longitude and latitude and elevation information, digital processing baseband circuit and central processing unit are by serial ports connecting communication, described central processing unit connects described demonstration touch unit and ground graph card, it is characterized in that: described low noise amplifier passes through bandpass filter successively, mixting circuit is electrically connected with described digital processing baseband circuit, bandpass filter, mixting circuit and digital processing baseband circuit are divided into the Big Dipper and the processing of GPS two-way, described bandpass filter is divided GPS bandpass filter and Big Dipper bandpass filter, described mixting circuit divides Big Dipper mixting circuit and GPS mixting circuit, described digital processing baseband circuit comprises GPS digital processing baseband chip and Big Dipper digital processing baseband chip.
2. a kind of Big Dipper according to claim 1 and gps satellite bimodulus navigational system, it is characterized in that: described GPS digital processing baseband chip is connected with the serial communication end of central processing unit respectively with transmission data pin (TXD1) with the reception data pin (RXD1) of Big Dipper digital processing baseband chip, and central processing unit switches the pattern of using by the reception data pin sending mode switching signal to two chips.
3. a kind of Big Dipper according to claim 2 and gps satellite bimodulus navigational system, is characterized in that: described demonstration touch unit arranges mode switch button, and mode switch button is by showing that touch unit is to central processing unit input pattern switching signal.
4. a kind of Big Dipper according to claim 2 and gps satellite bimodulus navigational system, is characterized in that: described pattern comprises that GPS, the Big Dipper, GPS be combined three kinds of patterns with the Big Dipper.
5. a kind of Big Dipper according to claim 2 and gps satellite bimodulus navigational system, is characterized in that: the time clock pin that GPS digital processing baseband chip and Big Dipper digital processing baseband chip receive satellite pulse signal is provided with light emitting diode.
6. a kind of Big Dipper according to claim 1 and gps satellite bimodulus navigational system, is characterized in that: described Big Dipper mixting circuit and GPS mixting circuit are exported respectively 4MHz intermediate-freuqncy signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494959.6U CN203572966U (en) | 2013-08-14 | 2013-08-14 | Beidou and GPS satellite double-module navigation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494959.6U CN203572966U (en) | 2013-08-14 | 2013-08-14 | Beidou and GPS satellite double-module navigation system |
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| CN203572966U true CN203572966U (en) | 2014-04-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483685A (en) * | 2014-11-17 | 2015-04-01 | 江苏博纳雨田通信电子有限公司 | Anti-4G (fourth generation)-interference Beidou GPS (global positioning system) multi-mode receiving-dispatching integration navigation communication module |
| CN104656107A (en) * | 2014-10-16 | 2015-05-27 | 嘉兴职业技术学院 | GPS Beidou dual-mode positioning device |
-
2013
- 2013-08-14 CN CN201320494959.6U patent/CN203572966U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656107A (en) * | 2014-10-16 | 2015-05-27 | 嘉兴职业技术学院 | GPS Beidou dual-mode positioning device |
| CN104656107B (en) * | 2014-10-16 | 2018-01-23 | 嘉兴职业技术学院 | GPS Big Dipper bimodulus positioners |
| CN104483685A (en) * | 2014-11-17 | 2015-04-01 | 江苏博纳雨田通信电子有限公司 | Anti-4G (fourth generation)-interference Beidou GPS (global positioning system) multi-mode receiving-dispatching integration navigation communication module |
| CN104483685B (en) * | 2014-11-17 | 2017-03-22 | 江苏博纳雨田通信电子有限公司 | Anti-4G (fourth generation)-interference Beidou GPS (global positioning system) multi-mode receiving-dispatching integration navigation communication module |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 523000 Guangdong city of Dongguan province Fenggang Zhen Huang Dong Cun Xu Long Industrial City second No. 28 building A, building B Patentee after: Guangdong Kovan Beidou Electronics Co., Ltd. Address before: 523000 Guangdong city of Dongguan province Fenggang Zhen Huang Dong Cun Xu Long Industrial City second No. 28 building A, building B Patentee before: Dongguan Kovan Electronic Science & Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20190814 |