CN114025391A - Local resolving receiver for Huffman compressed multi-frequency synchronous transmission - Google Patents
Local resolving receiver for Huffman compressed multi-frequency synchronous transmission Download PDFInfo
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- CN114025391A CN114025391A CN202111124146.3A CN202111124146A CN114025391A CN 114025391 A CN114025391 A CN 114025391A CN 202111124146 A CN202111124146 A CN 202111124146A CN 114025391 A CN114025391 A CN 114025391A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 20
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 abstract description 11
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001061260 Emmelichthys struhsakeri Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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Abstract
The invention provides a local resolving receiver for Huffman compressed multi-frequency synchronous transmission, and relates to the technical field of online safety monitoring. The system comprises a power supply module, a microprocessor power supply module, an SX1301 eight-channel LORA module, a GNSS receiving board card and a 485 module; the power supply module is connected with the microprocessor through being provided with a printed circuit I, the microprocessor controls the SX1301 eight-channel LORA module through being provided with a printed circuit II, the microprocessor controls the GNSS receiving board card through being provided with a printed circuit III, and the microprocessor is connected with the 485 module through being provided with a printed circuit IV. The invention provides a local resolving receiver for Huffman compressed multi-frequency synchronous transmission, which avoids the situation that the receiver cannot be used in places without mobile cellular signals or when the mobile cellular network signals are poor, and solves the problems that a large-capacity storage battery and a large-capacity solar panel are required to be configured when the receiver works and the cost of a system is increased due to large power consumption of a mobile cellular network communication module.
Description
Technical Field
The invention provides a local resolving receiver for Huffman compressed multi-frequency synchronous transmission, and relates to the technical field of online safety monitoring.
Background
Huffman coding is developed by Huffman professor in the fifties of the last century, an optimal binary tree is constructed under the support of Huffman algorithm by means of a tree structure in a data structure, the tree is named as Huffman tree, Huffman coding is a coding form constructed on the basis of the Huffman tree, and the Huffman coding has very wide application.
SX1301 is a baseband chip based on LoRa modulation with the goal of providing a robust star base station for a wide range of wireless nodes. The method can realize the transceiving of wireless data by adopting 8 carrier signals with different frequencies on one chip, supports the parallel processing of multi-channel and multi-data rate based on the technology, and can cover about two kilometers in the urban environment with dense buildings, and the coverage range can reach 10 kilometers in suburbs with lower density.
GNSS (Global Navigation Satellite System) is a general term for Satellite Navigation positioning systems such as the beidou System (BDS), GPS, GLONASS, Galileo systems, and the like, and may also refer to their enhanced systems.
The GNSS receiver is used for monitoring the displacement of the earth surface for a long time on line, and when the earth surface has small displacement, the data monitored by the GNSS device is changed, so that the displacement condition of the earth surface is monitored. The GNSS receiver is suitable for the fields of large range, multiple monitoring points, low observation frequency of mine ground surface settlement and side slope monitoring, landslide and earth-rock dam displacement monitoring and the like.
In engineering practice, the GNSS receiver needs to be set as a reference station and a mobile station, and the reference station transmits the observed value and the coordinate information of the survey station to the rover station through a data chain. At present, the mode for realizing the process in the market is realized based on a mobile cellular network mode, and the mode has several great disadvantages, so that the mode cannot be used in places without mobile cellular signals or when the mobile cellular network signals are poor, and meanwhile, the power consumption of a mobile cellular network communication module is large, so that a large-capacity storage battery and a large-capacity solar panel are required to be configured when a receiver works, and the cost of the system is increased.
Disclosure of Invention
In order to solve the above problems, the present invention provides a local solution receiver for huffman compressed multi-frequency synchronous transmission, which is designed to solve the problem of the prior art that GNSS in areas without cellular network cannot settle accounts
The invention provides a local resolving receiver for Huffman compressed multi-frequency synchronous transmission, which comprises a power supply module, a microprocessor power supply module, an SX1301 eight-channel LORA module, a GNSS receiving board card and a 485 module, wherein the power supply module is used for supplying power to the GNSS receiving board card; the power supply module is connected with the microprocessor through being provided with a printed circuit I, the microprocessor controls the SX1301 eight-channel LORA module through being provided with a printed circuit II, the microprocessor controls the GNSS receiving board card through being provided with a printed circuit III, and the microprocessor is connected with the 485 module through being provided with a printed circuit IV.
The power supply module provides power for the microprocessor.
And the microprocessor controls the GNSS receiving board card to read GNSS data.
And the 485 module outputs the final resolving result and configures the working mode.
The SX1301 eight-channel LORA module can achieve 5-kilometer data communication which is transmitted and received at 8 different carrier frequencies under the condition that mountainous areas and dense forests are shielded.
The microprocessor module adopts a Cortex-M4 kernel-based processor STM32L4XX, and the microprocessor is used for acquiring and resolving data of the GNSS board card.
The received datum station data divides a complete original data frame into 8 subframes, and the 8 subframes are compressed by a Huffman compression algorithm and then respectively transmitted by using 8 different carrier frequencies.
The mobile station monitors 8 different carrier frequencies simultaneously, and assembles the received data of the 8 different carrier frequencies into a complete original data frame after the data is decompressed by the Huffman.
The invention has the beneficial effects that:
the invention provides a local resolving receiver for Huffman compressed multi-frequency synchronous transmission, which avoids the situation that the receiver cannot be used in places without mobile cellular signals or when the mobile cellular network signals are poor, and solves the problems that a large-capacity storage battery and a large-capacity solar panel are required to be configured when the receiver works and the cost of a system is increased due to large power consumption of a mobile cellular network communication module.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a local solution receiver for huffman compression multi-frequency synchronous transmission according to the present invention.
Fig. 2 is a flow chart of the work of a reference station of a local solution receiver for huffman compressed multi-frequency synchronous transmission according to the invention.
Fig. 3 is another reference station work flow diagram of a local solution receiver for huffman compressed multi-frequency synchronous transmission according to the present invention.
(1, GNSS receiving board card, 2, printed circuit III, 3, power supply module, 4, printed circuit I, 5 microprocessor, 6, printed circuit II, 7, SX1301 eight-channel LORA module, 8, printed circuit IV, 9, 485 module)
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to fig. 3, the present invention provides a local solution receiver for huffman compression multi-frequency synchronous transmission, which includes a power supply module 3, a microprocessor 5 for supplying power, an SX1301 eight-channel LORA module 7, a GNSS receiving board card 1, and a 485 module 9; the power supply module 3 is connected with the microprocessor 5 through being provided with a printed circuit I4, the microprocessor 5 controls the SX1301 eight-channel LORA module 7 through being provided with a printed circuit II6, the microprocessor 5 controls the GNSS receiving board card 1 through being provided with a printed circuit III2, and the microprocessor 5 is connected with the 485 module 9 through being provided with a printed circuit IV 8.
The power supply module 3 of the invention provides power for the microprocessor 5.
In the invention, the microprocessor 5 controls the GNSS receiving board card 1 to read GNSS data.
In the invention, the 485 module 9 outputs the final calculation result and configures the working mode.
The SX1301 eight-channel LORA module 7 can realize 5-kilometer data communication which is transmitted and received at 8 different carrier frequencies under the condition that mountainous areas and dense forests are shielded.
According to the invention, the microprocessor module 5 adopts a Cortex-M4 kernel-based processor STM32L4XX, and the microprocessor 5 is used for acquiring and resolving data of the GNSS board card.
The received datum station data divides a complete original data frame into 8 subframes, and the 8 subframes are compressed by a Huffman compression algorithm and then respectively transmitted by using 8 different carrier frequencies.
The mobile station monitors 8 different carrier frequencies simultaneously, and assembles the received data of the 8 different carrier frequencies into a complete original data frame after the data is decompressed by Huffman.
The working principle is as follows: when the GNSS receiver is used, the power supply module 3 can supply power to the microprocessor module 5, meanwhile, the microprocessor 5 monitors whether the 485 module 9 receives the GNSS mode setting in real time, and if the GNSS mode setting is received, the microprocessor 5 sets the GNSS receiver as a corresponding mobile station/reference station. And holds the setting result in the internal memory.
After the GNSS completes setting the reference station and the mobile station, the microprocessor 5 reads the set state if the GNSS is the reference station. The micro-processing unit 5 controls the GNSS board 1 to receive data, and after receiving a frame of complete original data, because the frame of complete original data is about 3 to 4 kilobytes, the transmission rate is slow by directly adopting a common LoRa mode, and the transmission requirement cannot be met, so that the frame of complete original data is divided into 8 subframes of 400 to 500 bytes, and the 8 subframes are further compressed by a huffman compression algorithm, and then the data are respectively transmitted by using 8 different carrier frequencies, and the load rate of communication is improved by more than 8 times.
If the GNSS receiver is set with the mobile station, the microprocessor 5 monitors 8 different carrier frequencies at the same time, and assembles the received data of the 8 different carrier frequencies into a complete original data frame after the data is decompressed by Huffman, and meanwhile, the microprocessor 5 synchronously controls and receives the corresponding data of the GNSS board card 1, and outputs the obtained resolving result through the 485 module 9 by calculating the data of the reference station and the mobile station.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A local solution receiver for huffman compressed multi-frequency synchronous transmission, characterized by: the GNSS receiver comprises a power supply module (3), a microprocessor (5) for supplying power, an SX1301 eight-channel LORA module (7), a GNSS receiving board card (1) and a 485 module (9); the power supply module (3) is connected with the microprocessor (5) through being equipped with printed circuit I (4), the microprocessor (5) is through being equipped with printed circuit II (6) control SX1301 eight passageway LORA module (7), microprocessor (5) is through being equipped with printed circuit III (2) control GNSS receipt integrated circuit board (1), and microprocessor (5) are through being equipped with printed circuit IV (8) and 485 module (9) and establish being connected.
2. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: the power supply module (3) provides power for the microprocessor (5).
3. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: and the microprocessor (5) controls the GNSS receiving board card (1) to read GNSS data.
4. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: and the 485 module (9) outputs the final calculation result and configures the working mode.
5. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: the SX1301 eight-channel LORA module (7) can achieve 5-kilometer data communication which is transmitted and received at 8 different carrier frequencies under the condition that mountainous areas and dense forests are sheltered.
6. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: the microprocessor module (5) adopts a processor STM32L4XX based on a Cortex-M4 kernel, and the microprocessor (5) acquires and resolves data of the GNSS board card.
7. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: the received datum station data divides a complete original data frame into 8 subframes, and the 8 subframes are compressed by a Huffman compression algorithm and then respectively transmitted by using 8 different carrier frequencies.
8. The local-resolution receiver of huffman compressed multi-frequency synchronous transmission according to claim 1, wherein: the mobile station monitors 8 different carrier frequencies simultaneously, and assembles the received data of the 8 different carrier frequencies into a complete original data frame after the data is decompressed by the Huffman.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111124146.3A CN114025391A (en) | 2021-09-24 | 2021-09-24 | Local resolving receiver for Huffman compressed multi-frequency synchronous transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111124146.3A CN114025391A (en) | 2021-09-24 | 2021-09-24 | Local resolving receiver for Huffman compressed multi-frequency synchronous transmission |
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| CN114025391A true CN114025391A (en) | 2022-02-08 |
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| CN202111124146.3A Pending CN114025391A (en) | 2021-09-24 | 2021-09-24 | Local resolving receiver for Huffman compressed multi-frequency synchronous transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117499994A (en) * | 2023-12-29 | 2024-02-02 | 南京市计量监督检测院 | Compression and restoration method for differential data recording and transmission of GNSS (Global navigation satellite System) locator |
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| US20150109154A1 (en) * | 2013-10-21 | 2015-04-23 | International Business Machines Corporation | Boosting decompression in the presence of reoccurring huffman trees |
| CN107749758A (en) * | 2017-10-30 | 2018-03-02 | 成都心吉康科技有限公司 | Non-real time physiological data Lossless Compression, the methods, devices and systems of decompression |
| CN109683177A (en) * | 2019-01-24 | 2019-04-26 | 上海欧科微航天科技有限公司 | Intelligent wearable device and intelligent wearable device communication means |
| CN209512922U (en) * | 2019-02-01 | 2019-10-18 | 南通海国机械有限公司 | A kind of lashing bridge real-time monitoring system |
| CN112485808A (en) * | 2021-02-04 | 2021-03-12 | 理工全盛(北京)科技有限公司 | GNSS positioning system, positioning method and positioning equipment based on LoRa communication |
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2021
- 2021-09-24 CN CN202111124146.3A patent/CN114025391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150109154A1 (en) * | 2013-10-21 | 2015-04-23 | International Business Machines Corporation | Boosting decompression in the presence of reoccurring huffman trees |
| CN107749758A (en) * | 2017-10-30 | 2018-03-02 | 成都心吉康科技有限公司 | Non-real time physiological data Lossless Compression, the methods, devices and systems of decompression |
| CN109683177A (en) * | 2019-01-24 | 2019-04-26 | 上海欧科微航天科技有限公司 | Intelligent wearable device and intelligent wearable device communication means |
| CN209512922U (en) * | 2019-02-01 | 2019-10-18 | 南通海国机械有限公司 | A kind of lashing bridge real-time monitoring system |
| CN112485808A (en) * | 2021-02-04 | 2021-03-12 | 理工全盛(北京)科技有限公司 | GNSS positioning system, positioning method and positioning equipment based on LoRa communication |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117499994A (en) * | 2023-12-29 | 2024-02-02 | 南京市计量监督检测院 | Compression and restoration method for differential data recording and transmission of GNSS (Global navigation satellite System) locator |
| CN117499994B (en) * | 2023-12-29 | 2024-03-19 | 南京市计量监督检测院 | Compression and restoration method for differential data recording and transmission of GNSS (Global navigation satellite System) locator |
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