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Data communication equipment and data communication method for communicating between vehicle-mounted terminal equipment and external equipment

A technology for vehicle-mounted terminals and external devices, applied in multiplexing communication, data exchange through path configuration, data exchange network, etc., can solve problems such as input delay, location error, and high smoothness dependence, and improve reliability sexual effect

Pending Publication Date: 2019-10-01
SHANGHAI QINGGAN INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data generated by external devices is highly dependent on the smoothness of the line. If the line is congested, the input delay of these data will inevitably occur. If the uncorrected data is used, it will lead to position positioning errors or other immeasurable impacts

Method used

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  • Data communication equipment and data communication method for communicating between vehicle-mounted terminal equipment and external equipment
  • Data communication equipment and data communication method for communicating between vehicle-mounted terminal equipment and external equipment
  • Data communication equipment and data communication method for communicating between vehicle-mounted terminal equipment and external equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment is performed between the vehicle-mounted terminal device and the external device. The external equipment generates measurement data and sends the measurement data to the vehicle terminal equipment. The measurement data received by the vehicle terminal device is corrected through the synchronization data packet and the feedback data packet between the vehicle terminal device and the external device. External devices may include, but are not limited to, TBOX and CAN bus devices, an inertial measurement unit (Inertial Measurement Unit, IMU) and a global navigation satellite system (Global Navigation Satellite System, GNSS). Optionally, the inertial measurement unit may be a gyroscope, an accelerometer, or the like.

[0038] figure 1 It is a schematic diagram of the vehicle-mounted terminal device 200 and the TBOX 100 according to an embodiment of the present invention.

[0039] The vehicle-mounted terminal device 200 (also called "vehicle machine") is th...

Embodiment 2

[0081] This embodiment is carried out on the vehicle terminal equipment. The vehicle-mounted terminal device may include a processor and a memory, and the memory stores instructions and data required for control, and the processor can execute these instructions and / or process these data, so as to implement the following method. The architecture of the vehicle-mounted terminal device is well known to those skilled in the art, and will not be expanded here. The external equipment generates measurement data and sends the measurement data to the vehicle terminal equipment. External devices can be figure 1 shown in TBOX, it can also be figure 2 The CAN bus device shown can also be other devices independent of the vehicle terminal device. The measurement data received by the vehicle terminal device is corrected through the synchronization data packet and the feedback data packet between the vehicle terminal device and the external device.

[0082] Figure 5 is a flowchart of a...

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Abstract

The invention provides a data communication method for communicating between vehicle-mounted terminal equipment and external equipment, which comprises the following time synchronization operations ofsending a synchronization data packet from the vehicle-mounted terminal equipment to the external equipment, the synchronization data packet comprising a sending timestamp of the vehicle-mounted terminal equipment; receiving the synchronous data packet at the external equipment, and recording a first receiving time stamp of the synchronous data packet received by the external equipment; sending afeedback data packet for the synchronous data packet from the external device, wherein the feedback data packet comprises a sending timestamp and a first receiving timestamp; receiving the feedback data packet at the vehicle-mounted terminal equipment, and recording a second receiving time stamp of the received feedback data packet; and enabling the vehicle-mounted terminal equipment to estimatethe difference value of the time axis between the vehicle-mounted terminal equipment and the external equipment according to the sending time stamp, the first time stamp and the second time stamp. Compared with the prior art, the timestamp of the measurement data is corrected, and the reliability of the measurement data is improved.

Description

technical field [0001] The present invention mainly relates to a data communication device and a data communication method, in particular to a data communication device and a data communication method for communicating between a vehicle-mounted terminal device and an external device. Background technique [0002] During the driving process of the vehicle, a large amount of data is needed to assist the driving of the vehicle or ensure the safety of the vehicle. Some data, such as acceleration data generated by an inertial measurement unit (Inertial Measurement Unit, IMU), position data generated by a global navigation satellite system (Global Navigation Satellite System, GNSS), and data generated by a controller area network (Controller Area Network, CAN) The data generated by the bus device is generated by a device other than the vehicle-mounted terminal device (herein referred to as an external device). The data generated by external devices is highly dependent on the smoo...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04L12/40
CPCH04J3/0667H04L12/40006H04L2012/40273
Inventor 穆允林
Owner SHANGHAI QINGGAN INTELLIGENT TECH CO LTD
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