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Cascading extended acquisition system and method based on CAN and LoRa

A technology of acquisition system and acquisition method, which is applied in the field of extended transmission, can solve the problems of no way to obtain real-time monitoring information, etc., and achieve the effect of increasing distance, increasing utilization rate and expanding range

Pending Publication Date: 2018-11-16
SHANDONG JINGCHENG ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (4) At present, mobile terminal equipment must access the ground server through the network to obtain on-site environmental parameters and equipment information. Without Ethernet, wifi, 4G, 3G and other IP-based networks, there is no way to obtain real-time monitoring information. has strong limitations

Method used

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  • Cascading extended acquisition system and method based on CAN and LoRa
  • Cascading extended acquisition system and method based on CAN and LoRa
  • Cascading extended acquisition system and method based on CAN and LoRa

Examples

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Embodiment 1

[0059] as attached figure 1 As shown, the cascaded expansion acquisition system based on CAN and LoRa of the present invention, its structure includes a transmission substation 1 and three collectors 2, between the transmission substation 1 and the collector 2 and between the collector 2 and the collector 2 Data connection and communication are carried out through the CAN bus 8.

[0060] as attached figure 2 As shown, the collector 1 includes a main controller 3, a secondary controller 4, a power module 14, a CAN transceiver 5, a CAN transceiver 2 6, a Flash storage module 7 and seven LoRa modules 9, and the seven LoRa modules 9 are distributed There are seven channels from channel 0 to channel 6, and the load capacity of the LoRa wireless network is increased through seven channels and through frequency division and time division. The power supply module 14 is electrically connected to the main controller 3, the secondary controller 4, the LoRa module 9, the first CAN tran...

Embodiment 2

[0063] The cascade expansion acquisition method based on CAN and LoRa of the present invention, the method comprises the steps:

[0064] S1. The collector 2 buffers and forwards CAN communication frames uploaded by the lower-level collector 2 and sent by the upper-level collector 2 or the transmission substation 1;

[0065] CAN communication application layer protocol definition:

[0066] CAN data frame definition:

[0067]

[0068] CAN bus technology uses identifiers for data transmission arbitration operations. According to the CAN2.0 protocol, CAN identifiers are divided into two types: standard identifiers and extended identifiers. The standard identifier is 11 bits, and the extended identifier is 29 bits. CAN The extended identifier is adopted, that is, the 29-bit extended identifier is adopted.

[0069] The planning functions implemented by the 29-bit identifier include priority (3 bits), message type (3 bits), source address (5 bits), destination address (5), total...

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Abstract

The invention discloses a cascading extended acquisition system and method based on CAN and LoRa and belongs to the extended transmission technology. The technical problem to be solved in the invention is how to improve anti-interference performance of wireless transmission in a mine roadway and CAN bus bandwidth data transmission speed. The adopted technical scheme is characterized in that the system comprises a transmission substation and at least one collector. The transmission substation and the collector as well as the collector and the collector realize data connection and communicationthrough a CAN bus. The collector comprises a master controller, an auxiliary controller, a CAN transceiver 1, a CAN transceiver 2, a Flash storage module and at least one LoRa module. The master controller is connected with the auxiliary controller through a serial port; the master controller is connected with the CAN transceiver 1 and the CAN transceiver 2 through the CAN bus; the master controller is connected with the Flash storage module through SPI; and the auxiliary controller is connected with the LoRa module through a serial port. The invention also discloses the cascading extended acquisition method based on CAN and LoRa.

Description

technical field [0001] The invention relates to the technical field of extended transmission, in particular to a cascade extended acquisition system and method based on CAN and LoRa. Background technique [0002] Due to the complex situation in the mine roadway, there are steel rails, brackets, dampers, lighting lines and power cables in the roadway, and the roadway walls are uneven, crisscross, and roundabout. In such a complicated and limited space, the propagation of radio waves and free space Very different from the ground. The transmission distance of radio waves in the mine roadway will generally attenuate to about one-fifth of the ground. Therefore, the deployment density of wireless collection devices in mine roadways is much higher than that on the ground, so the deployment cost of wireless collection devices in mine roadways is relatively high. [0003] In order to upload the data in the mine to the ground server through the industrial Ethernet, a substation devi...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04L29/08H04W28/08H04W72/04H04W76/10G08C17/02
CPCH04L12/40H04L67/12H04W28/08H04W72/0446H04W72/0453H04W76/10G08C17/02H04L2012/40215Y02D30/70
Inventor 杨锐孙华晨李华青
Owner SHANDONG JINGCHENG ELECTRONICS SCI & TECH
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