CN110749889A

CN110749889A - Angle measuring system

Info

Publication number: CN110749889A
Application number: CN201911031136.8A
Authority: CN
Inventors: 周喆全; 周芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-02-04

Abstract

The invention provides an angle measuring system, which comprises two ultrasonic probes, a single chip microcomputer system and a display system; the two ultrasonic probes are used for detecting the distance of a target and recording distance data; the single chip microcomputer system is in communication connection with the ultrasonic probes and is used for receiving the distance data and the fixed distance data between the two ultrasonic probes, calculating angle data and sending the angle data; the display system is electrically connected with the single-product machine module and used for receiving and displaying the angle data. The invention can accurately measure the specific angle information of the obstacle target.

Description

Angle measuring system

Technical Field

The invention relates to the technical field of ultrasonic measurement, in particular to an angle measurement system.

Background

In daily life, automobiles have gone into thousands of households, and automobile reversing radars are well known by the families.

Automotive radars, as the name implies, are radars for automobiles or other ground-based motor vehicles. It therefore comprises various radars based on different technologies (e.g. laser, ultrasound, microwave), with different functions (e.g. finding obstacles, predicting collisions, adaptive cruise control) and using different operating principles (e.g. pulse radar, FMCW radar, microwave impact radar). Microwave radars are of commercial importance in automotive radars.

The automobile reversing radar transmits ultrasonic waves through the ultrasonic probe, and can detect and acquire the distance and the left and right directions of an obstacle behind a vehicle under the condition of no contact.

However, the existing automobile reversing radar cannot accurately give specific angle information of the obstacle.

Disclosure of Invention

In view of this, the present invention provides an angle measurement system to solve the technical problem that the existing car backing radar cannot accurately provide the specific angle information of the obstacle.

The technical scheme of the invention is realized as follows:

an angle measuring system comprises two ultrasonic probes, a single chip microcomputer system and a display system;

the two ultrasonic probes are used for detecting the distance of a target and recording distance data;

the single chip microcomputer system is in communication connection with the ultrasonic probes and is used for receiving distance data and fixed distance data between the two ultrasonic probes, calculating angle data and sending the angle data;

and the display system is electrically connected with the single-product machine module and is used for receiving and displaying the angle data.

Preferably, the single chip microcomputer system comprises a single chip microcomputer development board and a single chip microcomputer module.

Preferably, the singlechip system comprises a singlechip development board with the model number of HC 6800-ES.

Preferably, the ultrasonic probe is US-015.

Preferably, the display system comprises a display screen and a control key, and the control key is electrically connected with the single chip microcomputer system.

Preferably, the display screen adopts a Liquid Crystal Display (LCD) 1602.

Preferably, the ultrasonic diagnosis device further comprises a power supply system, and the power supply system is electrically connected with the single chip microcomputer system, the display system and the ultrasonic probe respectively.

Has the advantages that:

the invention sets two ultrasonic probes, a single chip microcomputer system and a display system, utilizes 2 ultrasonic sensors to form a sensor array, obtains the distance difference between a target and each ultrasonic sensor through measurement, inputs the distance difference into the single chip microcomputer system for calculation, can obtain the angle information of the target and display the angle information on a display, and accurately measures the specific angle information of the barrier target, thereby realizing the ultrasonic-based non-contact angle measurer.

Drawings

FIG. 1 is a schematic block diagram of an angle measurement system of the present invention;

fig. 2 is a schematic diagram of angle measurement in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, an embodiment of the present invention provides an angle measurement system, which includes two ultrasonic probes, a single chip microcomputer system, and a display system;

the single chip microcomputer system is in communication connection with the ultrasonic probes and is used for receiving the distance data and the fixed distance data between the two ultrasonic probes, calculating angle data and sending the angle data; the specific principle is that an angle measurement schematic diagram is shown in fig. 2. Assuming that the acoustic wave propagates as a plane wave, there is a distant target in the theta direction of the sensor. Because the angle theta exists between the target and the sensors, when two sensors simultaneously measure the distance of the target, a distance difference deltaR is measured, and the angle of the target can be calculated according to the following formula by combining the distance d between the two sensors.

ΔR＝d cosθ

Where Δ R is the distance difference, d is the distance between the sensors, and θ is the target angle.

The display system is electrically connected with the single-product machine module and used for receiving and displaying the angle data.

The singlechip system comprises a singlechip development board and a singlechip module. The singlechip system comprises a singlechip development board with model number HC 6800-ES. The processor HC6800-ES singlechip development board is used as a main part of a hardware circuit, wherein the 51-series singlechip is used as a central calculation chip and is mainly responsible for processing data, performing data operation on the data received by the sensor to obtain an angle to be measured and controlling the time sequence of the sensor and the display. In the internal programming, the delay function ensures that the single chip microcomputer development board can be in a continuous running state after being powered on, the timer function ensures the clock of the whole hardware system to be uniform, the interrupt function realizes the storage of the distances measured by the ultrasonic sensors at different positions, and the calculation function is used for calculating the angle information of the target from the two distance measurement information.

The ultrasonic probe adopts US-015, and this probe can carry out non-contact range finding in 2cm-4 m's scope, and the range finding precision is higher than 1mm under the ideal condition, and repeated measurement uniformity is better. In the program, a function of the 51 single chip microcomputer is used for providing a trigger signal for the sensor to trigger ranging work, and the timing module is used for recording the round-trip time t of ultrasonic waves output by the sensor and calculating distance data according to the time t.

The display system comprises a display screen and a control key, and the control key is electrically connected with the single chip microcomputer system. The display screen adopts a Liquid Crystal Display (LCD) 1602; the display device can display 16x2 characters, can display the data result processed by the single chip microcomputer on a screen in real time, and displays the real-time measurement result of the angle.

The ultrasonic probe also comprises a power supply system which is respectively and electrically connected with the singlechip system, the display system and the ultrasonic probe.

The angle measurer has the advantages of simple structure, stable performance, convenient use, low price, good maintainability, certain practical value and common modules.

Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only for the purpose of illustrating the technical solutions of the present invention, and not for the purpose of limiting the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. An angle measuring system is characterized by comprising two ultrasonic probes, a single chip microcomputer system and a display system;

2. The angle measurement system of claim 1, wherein the single-chip microcomputer system comprises a single-chip microcomputer development board and a single-chip microcomputer module.

3. The angle measuring system of claim 2, wherein the single-chip microcomputer system comprises a single-chip microcomputer development board model HC 6800-ES.

4. The angle measurement system of claim 1, wherein the ultrasonic probe employs US-015.

5. The angle measurement system of claim 1, wherein the display system comprises a display screen and a control button, the control button being electrically connected to the single-chip microcomputer system.

6. The angle measurement system of claim 5, wherein the display screen is a Liquid Crystal Display (LCD) 1602.

7. The angle measurement system of claim 1, further comprising a power supply system electrically connected to the single chip microcomputer system, the display system, and the ultrasonic probe, respectively.