CN202929488U

CN202929488U - Indoor human motion target automatic tracker

Info

Publication number: CN202929488U
Application number: CN 201220667602
Authority: CN
Inventors: 黄绿娥; 鄢化彪; 李平康
Original assignee: Jiangxi University of Science and Technology
Current assignee: Jiangxi University of Science and Technology
Priority date: 2012-12-06
Filing date: 2012-12-06
Publication date: 2013-05-08
Anticipated expiration: 2022-12-06

Abstract

According to the utility model, the problem that a present common pan-tilt cannot move with a motion target for automatic tracking is solved, and an indoor human motion target automatic tracker is designed. The indoor human motion target automatic tracker is a mobile electronic device which can be used for 360-degree automatic target tracking of a fixed monitoring pan-tilt. The whole system comprises a P89v51 singlechip system (1), a power-converter module (2), a stepper motor driver module (3), a rotary pan-tilt (4), a camera (5) and a system control PC (6). The P89v51 singlechip system (1) is connected with the stepper motor driver module (3) which is connected with the rotary pan-tilt (4). The camera (5) is fixed on the rotary pan-tilt (4) and is connected with the system control PC (6). The system is small, practical, stable, reliable and low-priced, and simultaneously a stepper motor drive control system can individually operate and has an extended function. It shows through experimental results that the system in practical applications can complete real-time security monitoring of motion targets.

Description

The autotracking unit of indoor human body moving target

Technical field:

The utility model relates to security monitoring and the tracking of moving target, especially a kind ofly can carry out the electronic installation that 360 ° of Automatic Target Trackings move to fixing monitoring head, specifically a kind of autotracking unit of moving target.

Background technology:

Present Motion Object Tracking System is mainly in the situation that the motionless picture internal object that carries out of The Cloud Terrace is followed the tracks of.In practical application as the human body target of the motion on stage or on the dais, video camera can only be followed the tracks of shooting by artificial mode, and common The Cloud Terrace also can only carry out the tracking of target under artificial operation, a kind of easy solution is to Automatic Target Tracking controller of The Cloud Terrace design, by the moving target information that camera acquisition arrives, determine the orientation of target, give the position angle of a movement of stepper motor, drive cloud platform rotation, make the human body target of camera to automatically track motion.The utility model design is a kind of based on indoor, the tracker of the automatic tracing moved human body target of motion The Cloud Terrace.

Summary of the invention:

The purpose of this utility model be exactly to solve existing common The Cloud Terrace can not be along with the movement of moving target automatic tracing, designed a kind of autotracking unit of indoor human body moving target.

concrete scheme of the present utility model is: a kind of autotracking unit of indoor human body moving target, it is characterized in that, comprise P89v51 Single Chip Microcomputer (SCM) system (1), power conversion module (2), stepper motor driver module (3), rotary head (4), video camera (5) and system control PC(6), P89v51 Single Chip Microcomputer (SCM) system (1) is by control bus pin OPTO, EA, SP, DIR, VCC, the corresponding pin OPTO of GND and stepper motor driver module (3), EA, SP, DIR, VCC, GND is connected, stepper motor driver module (3) is by pin R+, R-, L+, L-is connected with rotary head (4), video camera (5) is fixed on rotary head (4), The Cloud Terrace drives video camera and carries out 360 ° of rotations, video camera (5) is controlled PC(6 by usb bus with system) be connected, P89v51 Single Chip Microcomputer (SCM) system (1) is controlled PC(6 by 9 needle serial port RS232 with system) be connected.

The Single Chip Microcomputer (SCM) system of P89v51 described in the utility model (1) and stepper motor driver module (3) form step motor control system, the control of realization to stepper motor, thereby driven rotary The Cloud Terrace (4) is the video camera (5) above stepper motor to rotate, video camera (5) gathers the new image of moving target again, new image information is delivered to system again control PC(6), form a closed-loop control system, make moving target be in the image pickup scope central area of video camera (5).

P89v51 Single Chip Microcomputer (SCM) system (1) is comprised of seven parts such as P89v51 single-chip microcomputer, power supply and clock module, keyboard load module, LED display module, bus driver isolation module, stepper motor driving and serial data transceiver modules, the LED display module is converted to parallel data by two 74HC595 with serial data, be connected to light-emitting diode display, prevent that external voltage from impacting and burn chip in order to improve Systems balanth, all input and output of system are all isolated by a photoelectric isolated chip.The bipolarity Double power driving circuit that is formed by L297 and L298, L297 monolithic controllor for step-by-step motor integrated circuit is applicable to the control of bipolarity two-phase stepper motor or unipolarity four-phase stepper motor, can control L298 dual H-bridge drive integrated circult with the L297 output signal, adopting driving voltage 46V, every phase current is the following stepping motor of 2.5A, L297 adopts the technique of analog/digital circuit compatibility, 20 pin DIP plastic package, often with+5V power supply, all signal wire is that TTL/CMOS is compatible, and L298 is the bridge driver of enjoying a double blessing of high voltage, large electric current.

Single-chip microcomputer can be directly connected to the RS232 bus by the MAX232 chip, uses the serial ports of single-chip microcomputer just can receive and dispatch data easily.

The utlity model has following advantage: system can satisfy the requirement that moving target reaches variable-speed tracking in real time, small and exquisite practicality, reliable and stable, cheap.Step motor control system can work independently and have extendable functions simultaneously.

Description of drawings:

Fig. 1 is structural principle block scheme of the present utility model;

Fig. 2 is structural circuit figure of the present utility model;

Fig. 3 is the primary control program process flow diagram of the utility model embodiment.

Embodiment:

As Fig. 1, a kind of cradle head controllor of automatic tracing moved object comprises that P89v51 Single Chip Microcomputer (SCM) system 1, power conversion module 2, stepper motor driver module 3, rotary head 4, video camera 5 and system control PC6.Wherein 220 volts of alternating currents are exported the ac voltage signal of 25～38 volts by an AC transformer, and the AC1 of access P89v51 Single Chip Microcomputer (SCM) system and AC2 end are powered to system; System gathers video image by video camera 5, is transferred to system by usb bus and controls in PC6, and the control PC6 of system carries out sharpening to the collection image to be processed, and is carrying out target identification, thereby obtains the particular location at target place; Target location and center picture position are compared, analyze when deviation occurring, and send rotate instruction camera is revised.

As Fig. 2, cradle head controllor of the present utility model is also with showing and keyboard entry function, can direction and the speed of rotary head 4 operations be shown, simultaneously as the automatic tracking function without The Cloud Terrace, also can manually input rotary head 4 motions and direction and speed in keyboard.

As Fig. 3, the software flow pattern of the closed-loop control system of the utility model embodiment.Principle of work of the present utility model is at first to gather image transmitting to the computing machine of module of target detection by the USB mouth, image detection module (algorithm is seen Fig. 3) will know whether there is moving target from image sequence, if there is moving target, provide the position of target in video image.Then this positional information is sent to target tracking module, according to given target location and other information, set up the rapid track and control pattern, obtain the estimation direction of target travel, control rotation direction, speed and the distance of video camera by driving system of stepping motor, thus with target lock-on in the camera field range.

Claims

1. the autotracking unit of an indoor human body moving target, it is characterized in that, comprise P89v51 Single Chip Microcomputer (SCM) system (1), power conversion module (2), stepper motor driver module (3), rotary head (4), video camera (5) and system control PC(6), P89v51 Single Chip Microcomputer (SCM) system (1) is by control bus pin OPTO, EA, SP, DIR, VCC, the corresponding pin OPTO of GND and stepper motor driver module (3), EA, SP, DIR, VCC, GND is connected, stepper motor driver module (3) is by pin R+, R-, L+, L-is connected with rotary head (4), video camera (5) is fixed on rotary head (4), The Cloud Terrace drives video camera and carries out 360 ° of rotations, video camera (5) is controlled PC(6 by usb bus with system) be connected, P89v51 Single Chip Microcomputer (SCM) system (1) is controlled PC(6 by 9 needle serial port RS232 with system) be connected.