CN105208351A - Pan-tilt control network monitoring system based on ONVIF standards - Google Patents
Pan-tilt control network monitoring system based on ONVIF standards Download PDFInfo
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- CN105208351A CN105208351A CN201510670685.5A CN201510670685A CN105208351A CN 105208351 A CN105208351 A CN 105208351A CN 201510670685 A CN201510670685 A CN 201510670685A CN 105208351 A CN105208351 A CN 105208351A
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Abstract
The invention discloses a pan-tilt control network monitoring system based on ONVIF standards. The system comprises a microcontroller which is connected with a reset module, a power module, a data storage circuit, a motor control unit, an Ethernet controller and an expander circuit, wherein the motor control unit is connected with a horizontal motor and a vertical motor; the Ethernet controller is connected with an ONVIF network camera through an exchanger; the expander circuit is connected with a ball machine address dial switch and a temperature monitoring module. The pan-tilt control network monitoring system can be connected with the network camera, so a user can have access to MAC of the camera through the network; the system receives a network command through the Ethernet controller, and an embedded software platform porting real-time operating system and a TCP-IP protocol stack analyze an ONVIF.PTZ network data packet and drive the motors to rotate; hence, the functions of positioning the camera in the horizontal direction and the vertical direction and cruise-scanning prearranged points are achieved, and real-time mutual communication between the system and the network camera is ensured.
Description
Technical field
The invention belongs to cloud platform control system technical field, relate to a kind of embedded cloud platform control system, be specifically related to a kind of cradle head control network monitoring system based on ONVIF standard.
Background technology
Along with socioeconomic development, the living standard of people improves constantly; Meanwhile, the awareness of safety of people is also in continuous reinforcement, and this is mainly manifested in people and more and more payes attention to the management of some important areas, monitoring and security precautions.Nowadays safety monitoring system is set up to be very important at modern important place or large-scale living area.
In recent years, Internet technology presented development with rapid changepl. never-ending changes and improvements, also brought into use Internet technology in security protection industry.Video monitoring system in China's security protection industry is just developed to network digital monitoring by simulation monitoring, and Network Video Surveillance occupies the dominant position of security protection industry gradually.Based on this kind of present situation, each producer releases the Intelligent high-speed ball-shaped camera of independent research one after another, the video camera of the type drives decoding device composition primarily of integrated camera and The Cloud Terrace, drives video camera to do identical motion, reach the purposes expanding monitoring range while The Cloud Terrace motion.But due to the interface disunity of different brands equipment, this just causes Network Video Surveillance market to lack opening to a certain extent always.
The interface standard of global Internet video series products is set up based on ONVIF, enable the compatible intercommunication of Internet video series products of different brands, support that the network cameras of ONVIF standard arises at the historic moment, cloud platform control system also must support ONVIF.PTZ (comprising The Cloud Terrace all-around mobile) agreement, and the cradle head control network monitoring system based on ONVIF standard has very large market prospects.
Summary of the invention
The object of the present invention is to provide a kind of cradle head control network monitoring system based on ONVIF standard, directly can be connected with network cameras, there is general network interface and unique MAC Address, user accesses the MAC of camera by network, whole system receives networking command by ethernet controller, embedded software platform is transplanted real-time oss ICP/IP protocol stack of unifying and is resolved ONVIF.PTZ network packet and the rotation of drive motors, realize camera horizontal vertical direction accurately to locate, preset point cruise scanning function, guarantee system in real time and network cameras communicate with one another.
The technical solution adopted in the present invention is, based on the cradle head control network monitoring system of ONVIF standard, comprise microcontroller, microcontroller is connected with reseting module, power module, data storage circuitry, motor control unit, ethernet controller and expanded circuit respectively; Motor control unit is connected with horizontal motor, motor vertical respectively; Ethernet controller is connected with ONVIF web camera by switch; Expanded circuit is connected with ball machine address toggle switch, temperature monitoring module respectively.
Feature of the present invention is also:
What microcontroller adopted is STM32F103 controller.
Reseting module is made up of independent house dog and window watchdog reset module.
Data storage circuitry adopts band EEPROM (Electrically Erasable Programmable Read Only Memo).
Motor control unit includes the pwm pulse signal transmitter unit be connected with microcontroller, and pwm pulse signal transmitter unit is connected with two motor drive ics; A motor drive ic connects horizontal motor; Another motor drive ic connects motor vertical.
Motor drive ic adopts L6219 motor drive ic.
The model of ethernet controller is ENC28J60.
The rtl5370 chip of gigabit networking is adopted in switch.
74HC165AD extended chip is set in expanded circuit.
Beneficial effect of the present invention is:
1. the present invention is based on the cradle head control network monitoring system of ONVIF standard, adopt low-power consumption and high performance microcontroller and ethernet controller as the core of cloud platform control system, switch is connected with network cameras (IPCamera); Microcontroller can be used for the ONVIF.PTZ packet that real-time listening pc client sends, and drives the rotation of horizontal motor or motor vertical, thus drives the ball machine core in network cameras to rotate.
2. the present invention is based on the cradle head control network monitoring system of ONVIF standard, in hardware designs, the switch adopting the rtl5370 chip of gigabit networking to carry as plate, had both ensured that the transmission of ptz data stabilization turn avoid image data transmission and has delay and packet drop; According to theory, the connection of camera and exchanger chip, the connection of The Cloud Terrace and exchanger chip, respectively need to connect through two network isolation transformers to take up room very much, when ensureing chip and the stability of a system, only need a transformer to stablize between camera and switch and carry out transfer of data choosing, the model of Transformer Selection is the h5007 of pulse company; In addition, in whole cradle head control network monitoring system, horizontal motor and motor vertical is provided with, for driving to horizontal direction and movement in vertical direction; Wherein vertical speed lower than horizontal velocity, will ensure network cameras smooth rotation when load-carrying; Consider that outdoor environment changes, for whole cradle head control network monitoring system has set up temperature sensor, radiator fan proterctive equipment.
3. the present invention is based on the cradle head control network monitoring system of ONVIF standard, on Software for Design, transplant real time operating system in microcontroller, application program is divided into the different task of multiple importance, between each task, reasonably distribute CPU time and system resource, improve the real-time of system; Transplant the built-in network protocol stack of lightweight, system not only can be made to have complete TCP/IP biological function explore network packet, also can control protocol stack to processor resource consumption; Integrated firmware upgrade functionality, is imported ROMPaq by serial ports the spare area of chip flash, then restarts system, enter service mode and copy the ROMPaq of spare area to system real estate.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of existing high-speed ball camera network monitoring system;
Fig. 2 be the present invention is based on ONVIF standard cradle head control network monitoring system in the structural representation of hardware system;
Fig. 3 is the schematic diagram of the software systems that the cradle head control network monitoring system that the present invention is based on ONVIF standard is embedded in.
In figure, 1.PC client, 2.ONVIF web camera, 3. temperature control protective device unit; 4. The Cloud Terrace decoding deck, 5. horizontal vertical motor, 6. high-speed ball-forming machine, 7. microcontroller; 8. reseting module, 9. power module, 10. data storage circuitry; 11.PWM pulse signal transmitter unit, 12. motor drive ics, 13. ball machine address toggle switchs; 14. horizontal motor, 15. motor verticals, 16. ethernet controllers; 17. switches, 18. expanded circuits, 19. temperature monitoring modules.
Specific embodiments
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
For existing high-speed ball-forming machine supervisory control system, its structure as shown in Figure 1, is made up of the pc client 1 connected by local area network (LAN) and high-speed ball-forming machine 6; High-speed ball-forming machine 6 wherein includes clouds terrace system and image unit; image unit adopts all-in-one movement; concrete employing be ONVIF web camera 2; ONVIF web camera 2 is connected with pc client 1 by LAN; The Cloud Terrace decoding deck 4 is provided with in clouds terrace system; The Cloud Terrace decoding deck 4 is connected with ONVIF web camera 2 by switching equipment, and The Cloud Terrace decoding deck 4 is also connected with temperature control protected location 3, horizontal vertical motor 5 respectively, realizes the control to ONVIF web camera 2 position.
In high-speed ball-forming machine supervisory control system, pc client 1 sends out video data decoding order by local area network (LAN) and sends cradle head control order.The Cloud Terrace decoding deck 4 is connected with ONVIF web camera 2 by switching equipment, flexibly the running of level of control motor vertical 5, thus drives the running of ONVIF web camera 2, reaches the object expanding monitoring range.
Whole high-speed ball-forming machine supervisory control system can be transmitted according to the real-time network of ONVIF standard implementation video compression data stream, for generation of video data encoder, receive the control command that clouds terrace system or pc client 1 send, the quality of control coding image and the direction of rotation of The Cloud Terrace and speed.
The present invention is based on the cradle head control network monitoring system of ONVIF standard, its structure as shown in Figure 2, include microcontroller 7, microcontroller 7 is connected with reseting module 8, power module 9, data storage circuitry 10, motor control unit, ethernet controller 16 and expanded circuit 18 respectively; Motor control unit is connected with horizontal motor 14, motor vertical 15 respectively; Ethernet controller 16 is connected with ONVIF web camera 2 by switch 17; Expanded circuit 18 is connected with ball machine address toggle switch 13, temperature monitoring module 19 respectively.
What microcontroller 7 adopted is STM32F103 controller; Microcontroller 7 completes respective function for controlling other modular circuits.
Due to GPIO (universal input/output) the interface limited amount of STM32F103 controller, so prepared expanded circuit 18 for microcontroller 7 in the present invention, 74HC165AD extended chip is set in expanded circuit 18, 74HC165AD extended chip can realize the expansion to STM32F103 controller GPIO interface, ball machine address toggle switch 13 parallel data is changed into serial data and give microcontroller 7 (in the video monitoring system of, on-the-spot monitoring environment needs multiple high-speed ball-forming machine certainly, this exploitation is that the toggle switch on microcontroller is designed to ball machine address, after ball machine powers on, microcontroller can detect the level state of each of toggle switch, 8 hytes are combined into a byte, therefore the address realm of ball machine is 0 ~ 255, this address has uniqueness in systems in which).
Reseting module 8 is for returning to initial state by circuit, when program exception, by resetting system, microcontroller 7 is carried out to the operation of a warm reset, be equivalent to make when not power down microcontroller 7 (STM32F103 controller) restart once.Reseting module 8 is made up of independent house dog and window watchdog reset module, detects and solves the fault caused by systems soft ware mistake, ensureing system reliability.
Power module 9 provides electric power for giving the whole cradle head control network monitoring system based on ONVIF standard, guarantees that the cradle head control network monitoring system based on ONVIF standard runs.
Data storage circuitry 10 uses EEPROM (band EEPROM (Electrically Erasable Programmable Read Only Memo)), can hold the power down realizing the data such as presetting bit, parameter, running status and store.EEPROM is the storage chip that after a kind of power down, data are not lost; On computers or special equipment can be wiped existing information, reprogramming; Generally be used in plug and play, very convenient.
Motor control unit, includes the pwm pulse signal transmitter unit 11 be connected with microcontroller 7, and pwm pulse signal transmitter unit 11 is connected with two motor drive ics 12; Wherein pwm pulse signal transmitter unit 11 is for launching pwm pulse signal to two motor drive ics 12, a motor drive ic 12 level of control motor 14 runs, another motor drive ic 12 controls motor vertical 15 and runs, and horizontal motor 14 and motor vertical 15 all adopt stepping motor; Wherein motor drive ic 12 adopts L6219 motor drive ic.
The model of ethernet controller 16 is ENC28J60; Ethernet controller 16 is resolved for receiving ONVIF.PTZ order, because ONVIF web camera 2 externally can only have a network interface, but network data will be transferred to inner ball machine core and The Cloud Terrace simultaneously, so need to add switch 17 at Web portal place.Ethernet controller 16 and microprocessor 7 are combined, can networking command be received and control the rotation that motor control unit realizes driving horizontal motor 14, motor vertical 15.
The rtl5370 chip of gigabit networking is have employed in switch 17; Through overtesting The Cloud Terrace and between switch 17, ONVIF web camera 2 and switch 17 each need that h5007 transformer just can be stable carry out transfer of data.
Expanded circuit 18 is for connecting ball machine address toggle switch 13 and temperature monitoring module 19; Temperature monitoring module 19, for the temperature of sensing chamber's external environment, when temperature controls heat abstractor higher than microcontroller during uniform temperature 7, carries out the heat radiation protection of equipment.
In the cradle head control network monitoring system that the present invention is based on ONVIF standard, microcontroller 7, motor control unit and horizontal motor 14, motor vertical 15 are cores of the Hardware Design.Pwm pulse signal transmitter unit 11 and two motor drive ics 12 form the main circuit of motor control unit, pwm pulse signal is sent by pwm pulse signal transmitter unit 11, pulse number determines motor angle displacement, and pulse frequency determines the velocity of rotation of horizontal motor 14 and motor vertical 15; Two motor drive ics 12 can control and driving has the winding of bipolar stepper motor (i.e. horizontal motor 14 and motor vertical 15); Because motor drive ic 12 (L6219 motor drive ic) inside has diode and PWM Current Control, ONVIF web camera just can be realized in the rotation of level 360 ° with vertical 180 °.
The present invention is based in the cradle head control network monitoring system of ONVIF standard, cloud control command is resolved and electric machine rotation is completed by microcontroller 7.Network interface makes embedded device have network savvy, can complete the communication with user, receives user instruction, is responsible for receiving the packet that pc client 1 issues phase machine core, resolves control command thus the proper exercise of control The Cloud Terrace; User just can control by pc client 1 rotation that whole cradle head control network monitoring system carries out all angles in real time.
In the cradle head control network monitoring system that the present invention is based on ONVIF standard, support that the cloud platform control system of ONVIF.PTZ agreement is the core of ONVIF web camera 2, connected by Ethernet and ethernet controller 16, monitor the ONVIF.PTZ order also dissection process that pc client 1 is transferred to ONVIF network shooting camera 2 movement, complete the operation defined in yard source signal, comprise Electric Machine Control and mass data storage, call.
The present invention is based in the cradle head control network monitoring system of ONVIF standard, software systems are cores, using FreeRTOS operating system as the platform of running software, and transplant LwIP protocol stack; Software systems comprise application layer, system layer and drive layer three aspect, specifically as shown in Figure 3, drive layer to be used for realizing the driving of STM32 firmware, LwIP Stack driver and Ethernet interface and drive; The transplanting work of system layer software platform mainly contains two aspects: one is the transplanting of operating system FreeRTOS, and another is the transplanting of protocol stack LwIP; Application layer is based upon on embedded OS, and application, to pc client 1 and The Cloud Terrace decoding deck 4, in the design process according to the light and heavy degree reasonable distribution system task of function, meets the real-time of system.
The present invention is based in the cradle head control network monitoring system of ONVIF standard, the transplanting work of platform is the key component of Design of System Software, FreeRTOS provides the functions such as task, time and memory management, semaphore, message queue, has multi-task scheduling strategy, to take up room and internal memory is little, the feature of portable cutting; The transplanting of FreeRTOS mainly comprises the relevant data type of compiler and stack type definition, task dispatcher run function, critical zone entry and exit, the nested service routine of tick interrupt etc.The transplanting of LwIP protocol stack on FreeRTOS mainly comprises operating system simulation layer and Ethernet interface, come by operating system abstract layer, this level of abstraction encapsulates the functions such as semaphore, message queue, task creation, timer and critical resource access.The pattern that LwIP adopts independent process to be separated with operating system nucleus is to improve portability.
For the cradle head control network monitoring system software that the present invention is based on ONVIF standard, be divided under FreeRTOS: the parsing of Systematical control, procotol, Electric Machine Control, data retransmission and burn-in test task.For monokaryon microcontroller 7, any time only has a task to be performed, other tasks are in non-operating state, FreeRTOS adopts the parameter uxPriority of xTaskCreate () api function to be that creating of task gives initial priority, ensures that scheduler effectively enters running status in order.Before opening merit scheduler, initialization system platform, comprises the initialization of LED, EEPROM, I2C, SPI, motor driving, network interface, ball machine address dial-up configuration information.In order to solve the problem of microcontroller 7 internal RAM resource anxiety, the line in cloud platform control system is swept, patrol the task groups such as preset point scanning, style Scan orientation altogether, shares one piece of internal memory and reaches the object of saving internal memory.
In the cradle head control network monitoring system that the present invention is based on ONVIF standard, have employed LwIP and resolve network cameras ONVIF agreement ptz packet, need, when monitoring pc client 1, order is sent to ONVIF web camera 2, wherein ptz order is by Http protocol transmission, Http is based on Transmission Control Protocol, microcontroller 7 needs to arrange LwIP physical layer interface and monitors the network data that 80 ports send, ethernet controller 16 is configured to promiscuous mode by register and can receives all by network interface card but destination address is the data of ONVIF web camera 2 movement, possess " broadcast address ", producing a hardware interrupts when capturing ONVIF packet reminds microcontroller 7 to enter buffer area parsing, Communications Processor Module program is according to protocol conversion standard, data format, header packet informations etc. analyze network packet, finally call motor control unit and drive horizontal motor 14, motor vertical 15 rotates, these functions can realize horizontal motor 14, motor vertical 15 self-inspection, according to control command normal rotation or according to presetting bit cruise function.Cradle head control order is by Http protocol transmission, and Http body matter is XML format, is obtained the PTZ specific instructions be embedded in xml code by analyzing XML file, solves the problem of the real-time locating rotation of The Cloud Terrace decoding deck.
Motor control unit realizes stable rotation of The Cloud Terrace and locates with accurate, timer 0 in microcontroller 7 provides horizontal motor 14, motor vertical 15 friction speed to run required pulse frequency, timer 2 and timer 4 are respectively used to horizontal motor 14, motor vertical 15 timing change speed, ensure that horizontal motor 14, motor vertical 15 speed of service and preset speed are consistent.In order to reduce horizontal motor 14, the concussion of motor vertical 15 machinery, system adopts electric current segmentation look-up table to drive horizontal motor 14, motor vertical 15, wherein segmentation table employing 128 times segmentation, A phase=255cos α, B phase=255sin α, produces PWM by STM32 general purpose timer and exports, and controls duty cycle square wave analog current signal level and encodes, replace voltage by control current of electric mode, not only ensure that motor smooth pivotal but also reduce system power dissipation.
The present invention is based on the cradle head control network monitoring system of ONVIF standard, can directly be connected with network cameras, there is general network interface and unique MAC Address, user accesses the MAC of camera by network, cloud platform control system receives networking command by ethernet controller, embedded software platform is transplanted real-time oss ICP/IP protocol stack of unifying and is resolved ONVIF.PTZ network packet and the rotation of drive motors, the function of the scanning that realizes that camera horizontal vertical direction is accurately located, preset point is cruised, guarantee system in real time and network cameras communicate with one another.
Claims (9)
1. based on the cradle head control network monitoring system of ONVIF standard, it is characterized in that, include microcontroller (7), described microcontroller (7) is connected with reseting module (8), power module (9), data storage circuitry (10), motor control unit, ethernet controller (16) and expanded circuit (18) respectively; Described motor control unit is connected with horizontal motor (14), motor vertical (15) respectively; Described ethernet controller (16) is connected with ONVIF web camera (2) by switch (17); Described expanded circuit (18) is connected with ball machine address toggle switch (13), temperature monitoring module (19) respectively.
2. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, what described microcontroller (7) adopted is STM32F103 controller.
3. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, described reseting module (8) is made up of independent house dog and window watchdog reset module.
4. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, described data storage circuitry (10) adopts band EEPROM (Electrically Erasable Programmable Read Only Memo).
5. the cradle head control network monitoring system based on ONVIF standard according to claim 1, it is characterized in that, described motor control unit includes the pwm pulse signal transmitter unit (11) be connected with microcontroller (7), and described pwm pulse signal transmitter unit (11) is connected with two motor drive ics (12); A motor drive ic (12) connects horizontal motor (14); Another motor drive ic (12) connects motor vertical (15).
6. the cradle head control network monitoring system based on ONVIF standard according to claim 5, is characterized in that, described motor drive ic (12) adopts L6219 motor drive ic.
7. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, the model of described ethernet controller (16) is ENC28J60.
8. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, adopts the rtl5370 chip of gigabit networking in described switch (17).
9. the cradle head control network monitoring system based on ONVIF standard according to claim 1, is characterized in that, described expanded circuit arranges 74HC165AD extended chip in (18).
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| CN108566509A (en) * | 2018-06-25 | 2018-09-21 | 芜湖纯元光电设备技术有限公司 | A kind of intelligent video camera head |
| CN109164754A (en) * | 2018-08-06 | 2019-01-08 | 大族激光科技产业集团股份有限公司 | A kind of smoothing method and its control device of servo-driver position command |
| CN111225052A (en) * | 2020-01-04 | 2020-06-02 | 普联技术有限公司 | Device function expanding method, device and storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108111821A (en) * | 2018-01-10 | 2018-06-01 | 深圳羚羊极速科技有限公司 | A kind of equipment for being integrally interconnected net video access gateway and edge calculations |
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| CN109164754B (en) * | 2018-08-06 | 2021-01-15 | 大族激光科技产业集团股份有限公司 | Smoothing method for servo driver position command and control device thereof |
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Application publication date: 20151230 |