CN112797935A - A non-contact object positioning measuring device and its control method - Google Patents
A non-contact object positioning measuring device and its control method Download PDFInfo
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
一种非接触式的物体定位测量装置，装置的OpenMV摄像头、激光测距模块及其电源、超声波测距模块均安装在二维云台上，二维云台、主控MCU模块、显示屏和电源模块均安装在装置平台上；OpenMV摄像头、激光测距模块、超声波测距模块以及显示屏均与主控MCU模块的接口电气连接。所述的激光测距模块及其电源、超声波测距模块安装在OpenMV摄像头上，激光电源安装在OpenMV摄像头的上部，激光测距模块与超声波测距模块均安装在OpenMV摄像头的前部面板上。一种基于非接触式物体定位测量装置的控制方法，包括手动控制模式及自动控制模式。本发明的有益效果是：便于携带、易于安装，提高了工业产品的检测效率。
A non-contact object positioning measurement device. The OpenMV camera, laser ranging module and its power supply, and ultrasonic ranging module of the device are all installed on a two-dimensional pan/tilt. The two-dimensional pan/tilt, the main control MCU module, the display screen and the The power modules are installed on the device platform; the OpenMV camera, the laser ranging module, the ultrasonic ranging module and the display screen are all electrically connected to the interface of the main control MCU module. The laser ranging module, its power supply, and the ultrasonic ranging module are installed on the OpenMV camera, the laser power supply is installed on the upper part of the OpenMV camera, and both the laser ranging module and the ultrasonic ranging module are installed on the front panel of the OpenMV camera. A control method based on a non-contact object positioning measuring device includes a manual control mode and an automatic control mode. The beneficial effects of the invention are: easy to carry, easy to install, and improve the detection efficiency of industrial products.
Description
Technical Field
The present invention relates to a positioning and measuring device for an object and a control method thereof, and more particularly, to a positioning and measuring device for a moving object and a control method thereof.
Background
Currently, in dimension detection of products, the most commonly used detection tools are contact measurement tools such as a micrometer, a vernier caliper, and a micrometer, or non-contact measurement tools such as a projector and a quadratic element measurer, so as to measure the dimension of an object and determine whether the dimension and the shape of the object meet the requirements of drawings.
These contact measurement means have low measurement accuracy and slow measurement speed, and are only suitable for measuring stationary objects. When measuring a moving object, the measuring instrument is easily damaged, and the surface of the object to be measured is easily damaged, so that the requirements of large-scale automatic production and nondestructive testing cannot be met. The non-contact measuring tools such as projectors and quadratic element measuring instruments are not suitable for measuring moving objects even though the measuring precision is high, and the instruments are complex to use and operate, inconvenient to carry and install and expensive in price.
The invention combines and reforms the existing laser ranging technology, ultrasonic ranging technology and image processing technology, and provides a non-contact object positioning and measuring device and a control method thereof. The laser ranging technology and the ultrasonic ranging technology are both precise measurement technologies, and have the advantages of long measurement range, high measurement precision and the like; the image processing technology can be used for object measurement and automatic tracking and positioning of moving objects. Therefore, the device has the advantages of high measurement precision, high measurement efficiency and convenience in carrying and installation.
Disclosure of Invention
The invention aims to provide a non-contact object positioning and measuring device and a control method thereof, which can automatically and rapidly and accurately position a target object, automatically measure the size of the object, overcome the problems of complex operation, overlarge volume, high manufacturing cost and the like of the conventional measuring instrument, and realize the purposes of simple operation, convenient carrying and easy installation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a non-contact object positioning and measuring device comprises an OpenMV camera, a laser ranging module, a power supply of the laser ranging module, an ultrasonic ranging module, a two-dimensional cradle head, a device platform, a master control MCU module, an OLED display screen and a power supply module, wherein the OpenMV camera, the laser ranging module, the power supply of the laser ranging module and the ultrasonic ranging module are all installed on the two-dimensional cradle head, and the two-dimensional cradle head, the master control MCU module, the display screen and the power supply module are all installed on the device platform; the OpenMV camera, the laser ranging module, the ultrasonic ranging module and the display screen are electrically connected with an interface of the master control MCU module.
The device platform is a step-shaped box-shaped support which is provided with a high table surface and a low table surface, and the surface of the device platform is coated with a layer of leather material.
The two-dimensional cradle head is installed on a higher table top of the device platform, the master control MCU module and the display screen are installed on a lower table top of the device platform, and the power supply module is installed inside the device platform.
The display screen is a touch operation display screen, and touch operation keys are arranged on the display screen.
The two-dimensional cradle head is composed of a base, a horizontal direction rotating steering engine, a vertical direction rotating steering engine and a vertical steering engine output arm.
The laser ranging module, the power supply thereof and the ultrasonic ranging module are installed on the OpenMV camera, the laser power supply is installed on the upper portion of the OpenMV camera, and the laser ranging module and the ultrasonic ranging module are both installed on the front panel of the OpenMV camera.
A control method based on a non-contact object positioning and measuring device comprises a manual control mode and an automatic control mode:
the manual control mode comprises the following steps:
s1, placing the measured object right in front of the positioning and measuring device, wherein the OpenMV camera of the positioning and measuring device acquires the shape and size information of the measured object, and the laser ranging module and the ultrasonic ranging module acquire the distance value information between the device and the measured object;
s2, after a touch operation key for starting measurement on the touch display screen is pressed, the main control MCU module starts to process the relation between the distance between the measured object and the device and the pixel points, and the information such as the size of the measured object is calculated more accurately by using the distance as a reference standard and the pixel points as the size after deformation by using a well-fitted algorithm;
and S3, after the measurement is finished, the device gives out sound and light prompts, and information such as the shape, the size and the like of the measured object is displayed on a display screen.
The control method of the automatic control mode comprises the following steps:
s4, the conveyor belt conveys the measured object to the visible range of the OpenMV camera of the positioning and measuring device, at the moment, the OpenMV camera acquires the coordinate information of the measured object, and after the coordinate information is processed by the main control MCU module, the two-dimensional cradle head automatically rotates by an angle and autonomously tracks the measured object until the light spot of the laser light source coincides with the central point of the measured object;
s5, when the light spot of the laser light source is superposed with the central point of the measured object, the OpenMV camera of the positioning and measuring device acquires the shape information and the pixel data of the measured object, and the laser ranging module and the ultrasonic ranging module acquire the distance data between the device and the measured object;
s6, the main control MCU module starts to process the relation between the distance between the measured object and the device and the pixel points, and the information such as the size of the measured object is calculated more accurately by using the fitted algorithm and taking the distance as a reference standard and the pixel points as the size after deformation;
s7, after the measurement is finished, the device gives out sound and light prompts, and information such as the shape, the size and the like of the measured object is displayed on a display screen;
and S8, after the object to be measured moves out of the view range of the OpenMV camera, the device waits for another object to be measured to enter the view range of the OpenMV camera, and the steps from S4 to S7 are repeatedly executed.
Compared with the prior art, the invention has the beneficial effects that:
1. the positioning and measuring device disclosed by the invention adopts a non-contact measuring mode, so that secondary damage caused by touch of a product in the detection process is avoided;
2. the positioning and measuring device has higher measuring efficiency than the traditional measuring means, and particularly can automatically measure the products on the conveyor belt, thereby effectively improving the detection efficiency of industrial products;
3. the positioning and measuring device is convenient to carry and mount, and is low in manufacturing cost.
Drawings
Fig. 1 is a schematic view of the overall structure of the positioning and measuring device of the present invention.
Fig. 2 is a block diagram of a measurement and control system of the positioning and measuring device of the present invention.
Fig. 3 is an electrical diagram of a main control MCU module of the measurement and control system.
Fig. 4 is an electrical diagram of an OpenMV camera interface of the measurement and control system.
Fig. 5 is an electrical diagram of a laser ranging module interface of the measurement and control system.
Fig. 6 is an electrical diagram of an ultrasonic ranging module interface of the measurement and control system.
Fig. 7 is an electrical diagram of a display screen interface of the measurement and control system.
Fig. 8 is an electrical diagram of an interface of a steering engine of the two-dimensional pan/tilt head.
In the figure: the system comprises a device platform, a 2-two-dimensional cradle head, a 3-OpenMV camera, a 4-laser power supply, a 5-ultrasonic ranging module, a 6-laser ranging module, a 7-main control MCU module and an 8-display screen.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the overall structure of the positioning and measuring device of the present invention.
A non-contact object positioning and measuring device comprises an OpenMV camera 3, a laser ranging module 6, a power supply 4 of the laser ranging module, an ultrasonic ranging module 5, a two-dimensional cradle head 2, a device platform 1, a master control MCU module 7, a display screen 8 and a power supply module, wherein the OpenMV camera 3, the laser ranging module 6 and the ultrasonic ranging module 5 are all installed on the two-dimensional cradle head 2, and the two-dimensional cradle head 2, the master control MCU module 7, the display screen 8 and the power supply module are all installed on the device platform 1; the OpenMV camera 3, the laser ranging module 6, the ultrasonic ranging module 5 and the display screen 8 are electrically connected with an interface of the main control MCU module 7.
The device platform 1 is a step-shaped box-shaped support and is provided with a high table board and a low table board, and the surface of the device platform is coated with a layer of leather material.
The two-dimensional cradle head 2 is arranged on a higher table top of the device platform 1, the main control MCU module 7 and the display screen 8 are arranged on a lower table top of the device platform 1, and the power supply module is arranged inside the device platform 1.
The display screen 8 is a touch type operation display screen, and a touch type operation key is arranged on the display screen.
The two-dimensional pan-tilt 2 is composed of a base, a horizontal direction rotary steering engine, a vertical direction rotary steering engine and a vertical steering engine output arm.
The main control MCU module 7 of the positioning and measuring device adopts an STM32F103RC microprocessor, the OpenMV camera 3 adopts OPENMV 4H 7 Cam (an STM32H7 processor and an OV7725 camera), the ultrasonic ranging module 5 adopts an US-100 ultrasonic module, the laser ranging module 6 adopts a VL53L1X laser ranging module, and the two-dimensional tripod head 2 adopts a DS3230 digital steering engine
A control method based on a non-contact object positioning and measuring device comprises a manual control mode and an automatic control mode:
the manual control mode comprises the following steps:
s1, placing the measured object right in front of the positioning and measuring device, wherein the OpenMV camera 3 of the positioning and measuring device acquires the shape and size information of the measured object, and the laser ranging module 6 and the ultrasonic ranging module 5 acquire the distance value information between the device and the measured object;
s2, after the touch operation key for starting measurement on the touch display screen 8 is pressed, the main control MCU module 7 starts to process the relation between the distance between the measured object and the device and the pixel points, and the information such as the size of the measured object is calculated more accurately by using the fitted algorithm and taking the distance as a reference standard and the pixel points as the size after deformation;
and S3, after the measurement is finished, the device gives out sound and light prompts, and the information such as the shape, the size and the like of the measured object is displayed on the display screen 8.
The control method of the automatic control mode comprises the following steps:
s4, the conveyor belt conveys the measured object to the visible range of the OpenMV camera 3 of the positioning and measuring device, at the moment, the OpenMV camera 3 acquires the coordinate information of the measured object, and after the coordinate information is processed by the main control MCU module 7, the two-dimensional cradle head 2 automatically rotates for an angle to automatically track the measured object until the light spot of the laser light source coincides with the central point of the measured object;
s5, when the light spot of the laser light source coincides with the central point of the measured object, the OpenMV camera 3 of the positioning and measuring device acquires the shape information and the pixel data of the measured object, and the laser ranging module 6 and the ultrasonic ranging module 5 acquire the distance data between the device and the measured object;
s6, the main control MCU module 7 starts to process the relation between the distance between the measured object and the device and the pixel points, and the information such as the size of the measured object is calculated more accurately by using the fitted algorithm and taking the distance as a reference standard and the pixel points as the size after deformation;
s7, after the measurement is finished, the device gives out sound and light prompts, and information such as the shape, the size and the like of the measured object is displayed on the display screen 8;
s8, after the object to be tested moves out of the view range of the OpenMV camera 3, the device waits for another object to be tested to enter the view range of the OpenMV camera 3, and repeats steps S4 to S7.
Compared with the prior art, the invention has the beneficial effects that:
1. the positioning and measuring device disclosed by the invention adopts a non-contact measuring mode, so that secondary damage caused by touch of a product in the detection process is avoided;
2. the positioning and measuring device has higher measuring efficiency than the traditional measuring means, and particularly can automatically measure the products on the conveyor belt, thereby effectively improving the detection efficiency of industrial products;
3. the positioning and measuring device is convenient to carry and mount, and is low in manufacturing cost.
Claims (7)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114993179A (en) * | 2022-05-31 | 2022-09-02 | 福建信息职业技术学院 | Non-contact object form and size measuring system based on linear regression |
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| JPH06186330A (en) * | 1992-12-21 | 1994-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Non-contact type three-dimensional position measuring device |
| CN104501720A (en) * | 2014-12-24 | 2015-04-08 | 河海大学常州校区 | Non-contact object size and distance image measuring instrument |
| CN109556540A (en) * | 2018-11-07 | 2019-04-02 | 西安电子科技大学 | A kind of contactless object plane degree detection method based on 3D rendering, computer |
| CN111121619A (en) * | 2018-11-01 | 2020-05-08 | 西南科技大学 | Space geometry automatic measurement method based on laser ranging |
| CN112129226A (en) * | 2020-11-03 | 2020-12-25 | 天津工业大学 | A non-contact object size and shape measuring device |
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2021
- 2021-02-05 CN CN202110160731.2A patent/CN112797935A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06186330A (en) * | 1992-12-21 | 1994-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Non-contact type three-dimensional position measuring device |
| CN104501720A (en) * | 2014-12-24 | 2015-04-08 | 河海大学常州校区 | Non-contact object size and distance image measuring instrument |
| CN111121619A (en) * | 2018-11-01 | 2020-05-08 | 西南科技大学 | Space geometry automatic measurement method based on laser ranging |
| CN109556540A (en) * | 2018-11-07 | 2019-04-02 | 西安电子科技大学 | A kind of contactless object plane degree detection method based on 3D rendering, computer |
| CN112129226A (en) * | 2020-11-03 | 2020-12-25 | 天津工业大学 | A non-contact object size and shape measuring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114993179A (en) * | 2022-05-31 | 2022-09-02 | 福建信息职业技术学院 | Non-contact object form and size measuring system based on linear regression |
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Application publication date: 20210514 |