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Mongline digital range radar and communication method

A technology of ranging radar and communication method, which is applied to radio wave measurement systems, measurement devices, reflection/re-radiation of radio waves, etc. The effect of less, low cost, and simple communication protocol analysis

Active Publication Date: 2012-10-31
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved by the present invention include, aiming at the problems that the communication system of the digital ranging radar in the prior art is complex in structure, high in cost, and occupying many interfaces, a communication method of a single-line digital ranging radar is provided, which corresponds to The communication system has simple structure, low cost, less interface occupation, stable communication work, strong anti-interference ability, high sensitivity, good consistency and interchangeability, and simple communication protocol analysis

Method used

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  • Mongline digital range radar and communication method
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Embodiment 1

[0030] This embodiment provides a communication method for a single-line digital ranging radar, including:

[0031] Send an information code representing the measured distance information, the information code is binary, wherein the first level of the first duration is connected to the second level of the first duration to represent 0, and the first level of the second duration The second level connected to the second duration indicates 1, the first duration is different from the second duration, and the first level and the second level have different level values.

[0032] In the multi-wire communication method, different levels are used to represent the data value (for example, high level represents 1 and low level represents 0, of course, it can also be reversed), so a separate clock synchronization signal must be used in this type of communication method. The clocks of each unit are unified to determine when a bit of data is transmitted (or to determine how to divide the s...

Embodiment 2

[0034] This embodiment provides a communication method for a single-wire digital ranging radar, wherein the single-wire digital ranging radar is a vehicle-mounted digital ultrasonic ranging radar used for parking assistance, which communicates with the vehicle's Display unit, alarm unit, etc. for communication. Of course, other types of digital ranging radars can also use the communication method of this embodiment.

[0035] like figure 1 , figure 2 As shown, the communication method of the single-wire digital ranging radar in this embodiment includes:

[0036] S01. Prepare to park, power on the radar.

[0037] S02. The radar starts to emit ultrasonic waves for distance measurement; preferably, the radar simultaneously sends a waiting signal of a high level (ie, the first level) to the display unit (ie, the target unit) on the vehicle. The waiting signal is a signal sent during the waiting time between two transmissions of distance information, which should be longer than...

Embodiment 3

[0054] This embodiment provides a single-line digital ranging radar, including:

[0055] Radar probes for measuring distances;

[0056] The control unit is used to receive the distance information measured by the radar probe, and send the distance information to the target unit by the above-mentioned communication method, and the control unit is connected to the target unit through a data line.

[0057] Wherein, the control unit can be in the form of a single-chip microcomputer, etc., and it can preferably be integrated with the radar probe, that is, one radar probe corresponds to one control unit.

[0058] Since the single-wire digital ranging radar of this embodiment can adopt the above-mentioned communication method, it has a simple structure, low cost, less interface occupation, stable communication work, strong anti-interference ability, high sensitivity, good consistency and interchangeability , Communication protocol analysis is simple.

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Abstract

The invention provides a mongline digital range radar and a communication method, belongs to the technical field of automobile auxiliary parking, and solves the problem that a communication system of the existing digital range radar is complex in structure, high in cost and multiple in occupation connector. The communication method of the mongline digital range radar comprises sending information codes standing for measured range information, the information codes are a binary system, a first electrical level of first duration is connected with a second electrical level of the first duration to stand for 0, a first electrical level of second duration is connected with a second electrical level of the second duration to stand for 1, time duration of the first duration and the second duration is different, and electrical level values of the first electrical levels and the second electrical levels are different. The mongline digital range radar adopts the communication method. The mongline digital range radar and the communication method can be used for a digital ultrasonic range radar on an automobile.

Description

technical field [0001] The invention belongs to the technical field of automobile auxiliary parking, and in particular relates to a single-line digital ranging radar and a communication method thereof. Background technique [0002] With the development of electronic technology, ranging radar is more and more widely used in car auxiliary parking. It can measure the distance between the front and rear ends of the vehicle and obstacles, so as to help the driver perform parking operations and prevent accidents. [0003] There are two types of ranging radars: analog and digital. Due to the gap in anti-interference and sensitivity, the application of analog ranging radar is far less than that of digital ranging radar. From the means of measuring distance, ranging radar includes ultrasonic ranging radar, laser ranging radar, infrared ranging radar, etc., among which ultrasonic ranging radar is the most widely used. [0004] At present, digital ranging radars are two-wire, four-wir...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S13/08
Inventor 李娟娟陈军周勇
Owner CHERY AUTOMOBILE CO LTD