Remote control system for photoelectric measurement and control equipment

Abstract

The remote control system for photoelectric measurement and control equipment involves photoelectric measurement and control technology and the field of fiber optic communications. It solves the problem that current high-precision vehicle-mounted optical measurement equipment cannot guarantee real-time operator operation due to geographical restrictions and personnel scheduling limitations. The control system includes: a communication module installed within the equipment at the near end, a far end, and a connection between the near end and the far end; the far end issues control instructions, which are transmitted to the near end via the communication module. The near end sends the instructions to the servo control module via a serial port to control the operating status and content of the equipment; the equipment simultaneously transmits collected image information and operating status information to the far end via the near end and the communication module. The present invention connects the remote control end and the equipment end via a field optical cable to transmit real-time data, thereby achieving the purpose of the remote control end controlling the equipment end and providing real-time feedback.

Description

Technical Field

[0001] The present invention relates to the field of photoelectric measurement and control technology and optical fiber communication, and in particular to a remote control system for photoelectric measurement and control equipment. Background Art

[0002] The remote control system for photoelectric measurement and control equipment separates the optical measurement equipment host from the operator, enabling flexible integration. This provides support for flexible deployment of subsequent equipment and flexible operator configuration. The remote control system enhances the control center's operational control capabilities over the equipment. When needed, the control center personnel can directly operate the equipment's tracking, dimming, and focusing functions, ensuring that equipment operation meets the center's requirements.

[0003] The design of the remote control system of optical measurement equipment needs to rely on the existing data communication network of the equipment. The existing data communication network is such as Figure 1 Through reasonable transformation design and installation of corresponding communication equipment, the control information of the remote control system can be transmitted to the existing data communication network. At the same time, the existing data communication network also needs to transmit equipment status data information, real-time digital images and other information to the remote end.

[0004] Remote control of optical measurement equipment has a proven track record at the Army, Air Force, and Strategic Support Force ranges. The initial design philosophy was to expand the scope of equipment deployment by separating operators from the equipment. While ensuring operator safety, the equipment can be placed within the impact danger zone, enabling close-range measurement of targets and high-definition, high-frame-rate imaging. Equipment requiring remote control generally features a short range and a large field of view, primarily used for staring measurement applications, with lower requirements for real-time control operations.

[0005] Currently, there are two main design approaches for remote control systems: dedicated networks and shared networks. Dedicated networks utilize separate, dedicated optical fibers to enable image and control data exchange between the near- and far-end optical measurement equipment. Their advantages include extremely low control latency and the ability to transmit multiple channels of high-definition, uncompressed digital images, ensuring near-end performance is essentially the same as near-end performance. However, their disadvantages are the need for a dedicated optical fiber channel, requiring either a dedicated channel within the existing optical network or the installation of a dedicated remote control fiber. Shared networks utilize the existing internal Ethernet network at the base station to transmit control data between the near- and far-end optical measurement equipment. Simultaneously, device images are converted to network digital image data streams using video encoders and decoders for transmission. While this design leverages existing communication networks, its disadvantages are that device control latency is highly dependent on the existing network latency, and the remote-end digital images are compressed and restored. This places significant strain on the internal network when multiple devices require remote control. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a remote control system for photoelectric measurement and control equipment, which solves the problem that the current vehicle-mounted high-precision optical measurement equipment cannot guarantee that the operator can operate the equipment in real time due to geographical location restrictions and personnel scheduling restrictions.

[0007] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0008] A remote control system for photoelectric measurement and control equipment includes: a proximal end installed inside the equipment, a distal end outside the equipment, and an optical fiber for connecting the proximal and distal ends; the distal end issues a control instruction, which is transmitted to the proximal end via the optical fiber; the proximal end sends the instruction to the servo control module via the serial port to control the working status and working content of the equipment; at the same time, the equipment sends the collected image information and working status information to the distal end via the proximal end and the optical fiber.

[0009] Preferably, the proximal end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, an optical module and a wavelength division multiplexer; the digital image converter collects image information in the imaging control module in the device, the digital signal fiber optic converter collects working status information in the information integration system, and the network data fiber optic converter collects network information in the main control computer, and converts the image information, working status information and network information into optical information through the wavelength division multiplexer and optical module and transmits it to the remote end.

[0010] Preferably, the remote end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, a wavelength division multiplexer, a monitor, an interactive operation panel, an optical module and a remote control computer; the wavelength division multiplexer receives the image information, working status information and network information sent by the proximal end, converts the image information, working status information and network information into electrical signals through the optical module and sends them to the digital image converter, the digital signal fiber optic converter and the network data fiber optic converter respectively, and the image information is displayed by the monitor; the working status information is displayed by the interactive operation panel, and control instructions to the servo control module are sent by operating the interactive operation panel; the network information is received by the remote control computer to realize interactive processing of network data.

[0011] Preferably, a duplex communication link is added to the device to receive remote control commands and feed back its own tracking status, while enabling free switching between remote control and local control.

[0012] Preferably, the near end and the far end are connected and data are transmitted in real time via a field optical cable.

[0013] Preferably, the remote end can be integrated into a single equipment box.

[0014] Preferably, the interactive operation panel also includes: a data acquisition card; the data acquisition card is composed of FPGA and ARM; the FPGA is responsible for the acquisition of switch quantities, the driving of the optical module and the transmission verification of internal data; the ARM chip is responsible for the acquisition of the remote single-pole status and the interactive screen display control and the interactive processing of network data.

[0015] The present invention provides the following benefits: connecting the remote control terminal and the equipment terminal via a field optical cable to transmit real-time data, enabling the remote control terminal to control the equipment terminal and provide real-time feedback. This solution enables stable and reliable remote control, improves operational efficiency, and allows for the separation of the optical measurement equipment host and the equipment operator, enabling flexible integration. This provides support for the flexible deployment of subsequent equipment and the flexible configuration of equipment operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Data communication network in the prior art.

[0017] Figure 2 Schematic diagram of the structure of the remote control system of the photoelectric measurement and control equipment of the present invention.

[0018] Figure 3 The present invention sets up a photoelectric measurement and control equipment remote control system in a data communication network in the prior art.

[0019] Figure 4 Flow chart of data received by the near end of the remote control system of the photoelectric measurement and control equipment of the present invention.

[0020] Figure 5 State switching diagram of the servo control system of the photoelectric measurement and control equipment remote control system of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 2As shown, the remote control system for photoelectric measurement and control equipment includes: a proximal end and a distal end installed within the equipment, and a communication module for connecting the proximal and distal ends; the distal end issues a control command, which is transmitted to the proximal end via the communication module. The proximal end then sends the command to the servo control module via a serial port to control the operating status and content of the equipment; the equipment simultaneously transmits collected image information and operating status information to the distal end via the proximal end and the communication module. The proximal end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, an optical module, and a wavelength division multiplexer; the digital image converter collects image information from the imaging control module in the equipment, the digital signal fiber optic converter collects operating status information from the information integration system, and the network data fiber optic converter collects network information from the main control computer. The image information, operating status information, and network information are converted into optical information via the wavelength division multiplexer and optical module and transmitted to the distal end. The remote end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, a wavelength division multiplexer, a monitor, an interactive operation panel, an optical module and a remote control computer; the wavelength division multiplexer receives the image information, working status information and network information sent by the proximal end, converts the image information, working status information and network information into electrical signals through the optical module and sends them to the digital image converter, the digital signal fiber optic converter and the network data fiber optic converter respectively, and the image information is displayed by the monitor; the working status information is displayed by the interactive operation panel, and control instructions to the servo control module are sent by operating the interactive operation panel; the network information is received by the remote control computer to realize interactive processing of network data.

[0023] like Figure 3 As shown, the existing data communication network includes: an equipment end, an electric control cabin and an optical fiber slip ring. The equipment end includes a digital camera, an encoder and a wavelength division multiplexer. The electric control cabin includes: an information integration processing module, a main control computer, a servo control module, an image recording module, an imaging system module, an image processing system and a network switch. After the digital camera captures the image, it is converted by the encoder and sent to the control cabin through the wavelength division multiplexer and optical fiber slip ring. The proximal end of the remote control system is set in the electric control cabin and is connected to the imaging control module, the information integration system and the main control computer respectively.

[0024] In order to adapt to the installation of a remote control system, the original information path of the digital camera also needs to be adaptively modified. The information comprehensive processing module needs to package the data information required by the remote control system and send it to the near-end receiver of the remote control system. The servo control module needs to receive the control information of the remote control system and make control authority switching settings in the internal program to ensure that the device can switch freely between short-range and long-range control states while ensuring the consistency of control accuracy. A duplex communication link is added to the servo control module to receive remote control commands and feedback its own tracking status, while realizing free switching between remote control and near-end control. Figure 5 As shown, in order to ensure the real-time and accuracy of the control command, a cyclic code is added to the control command. When the cyclic code is abnormal, the servo control module actively jumps back to the near control state to ensure the stability of the equipment state.

[0025] Because the remote control system's far end is far from the device, a specialized communication module is required to obtain the required digital images and device status information from the near end and transmit this information to the far end via dedicated optical fiber or an existing Ethernet network. Simultaneously, the remote control operations are converted into digital information, which is then transmitted back to the near end of the device and converted into a format that the near end can process. The communication module must overcome issues such as increased signal interference, low signal-to-noise ratio, high bit error rate, and unstable network latency during long-distance transmission to ensure the real-time, stable, and reliable transmission of data.

[0026] The remote control system is equipped with a fiber-optic data transmission terminal at the device end. This terminal collects the device's HD-SDI high-definition digital images, the servo control module's internal status data, and the main control computer's internal data, converting them into optical signals and transmitting them via optical fiber to the remote control system's remote end. The remote end displays the device's HD-SDI high-definition digital images in real time on a monitor, and remote control of the main control computer and imaging control module is achieved through remote login and other technologies. An interactive operation panel is also installed at the remote end, enabling remote single-lever control of the servo control module, automatic tracking, and source switching. The entire remote control system utilizes high-speed fiber-optic transmission technology to achieve ultra-low latency transmission of digital images, device status information, and operational control commands, ensuring that the operating status of the remote control end is essentially consistent with that of the device.

[0027] The entire remote control system uses a dedicated single-mode optical fiber to achieve interactive transmission of data within the equipment, which has high real-time performance and security. In this embodiment, the near-end and far-end are connected and data is transmitted in real time through a field optical cable. A digital image converter is used to transmit uncompressed HD-SDI digital images directly to the far end, ensuring low latency and clarity of the surveillance image. Using digital coding technology, a 3Gbps HD-SDI video signal can be transmitted over long distances through a single-mode optical fiber. Using a high-power optical module, the digital image signal can be transmitted up to 80Km without distortion and without relaying. The signal format of the 3GbpsHD-SDI high-definition digital TV optical terminal ranges from 270Mbps to 2.97Gbps. The 3Gbps HD-SDI video optical terminal system supports signals in digital TV formats such as SMPTE424M, SMPTE292, SMPTE344M, SMPTE259M and DVB-ASI (270M).

[0028] The connection between the remote control computer and the main control computer uses a dedicated Ethernet IEEE802.3 media converter, which can realize media conversion between 10 / 100 / 1000Base-T twisted pair and 1000BASE-X or extend the network transmission distance. It is mainly used for long-distance (20 / 40 / 60 / 80 kilometers) transmission in optical fiber networks, and the electrical port fully supports 10 / 100 / 1000M self-adaptation. The remote control computer is based on the Ethernet switching chip + FPGA solution, and can be optionally equipped with an independent SNMP function module, with powerful local and remote management functions and complete alarm functions. Due to the use of a dedicated network data converter, the internal delay of the entire network transmission is low, thereby ensuring the real-time performance of remote remote login operations.

[0029] The interactive operation panel uses a dedicated data acquisition card with fiber optic remote transmission capabilities. An operation control panel identical to the one on the device side is installed at the remote end to ensure that the remote operation method is consistent with the device side. At the same time, the remote data acquisition card can also provide real-time feedback on the operating status of the device-side servo control module. The data acquisition board adopts an FPGA+ARM architecture, in which the FPGA is responsible for collecting switch quantities, driving the optical module, and verifying the transmission of internal data. The ARM chip is responsible for collecting single-pole status, controlling the interactive screen display, and interactive processing of network data. The data acquisition card uses the Aurora protocol to drive the optical module, which adopts a 1.25Gbps, 80Km high-power, high-sensitivity module. In view of the high attenuation and high bit error rate of optical fiber during long-distance transmission, a CRC-32 check is introduced to confirm the integrity of the received data before forwarding it. At the same time, an internal data status monitoring mechanism is set up to automatically send a retransmission request when an erroneous data packet occurs. In addition, the data packet exchange of the entire system is maintained at 100Hz / s, and the interval between each data packet is only 10ms, ensuring the real-time display of remote data and operation feedback.

[0030] The wavelength division multiplexer concentrates the input and output optical signals of the digital image converter, network data fiber optic converter, digital signal fiber optic converter, etc. onto the wavelength division multiplexer, thereby realizing the simultaneous transmission of data, control and digital image data on a single single-mode optical fiber.

[0031] The remote unit can also be portable, integrating the required remote computer, monitor, digital image converter, network data fiber optic converter, wavelength division multiplexer, digital signal fiber optic converter, and interactive touch screen into a single equipment box. When in use, the box can be deployed by connecting to optical fiber and 220V power supply. When folded, the box can be transported by a single person.

[0032] When transmitting information over a distance of 60 km through optical fiber, the optical signal loses its optical power due to absorption, dispersion, and other factors. The general attenuation coefficient of single-mode optical fiber is 0.18dB / km. Under ideal conditions, the attenuation of 60km transmission distance is not less than 10.8dB. The optical power attenuation is accompanied by a decrease in signal quality and a significant increase in the bit error rate. In order to address the problem of information accuracy in long-distance transmission projects, such as Figure 4 As shown in the figure, a set of information verification and error retransmission mechanisms are designed in the FPGA to ensure that the correct control information data is transmitted to the device end within the specified time interval. The optical fiber connection uses the AURORA protocol, which has functions such as automatic reconnection in the event of a disconnection, and the communication link is stable even in the case of high bit error rates.

Claims

1. Photoelectric measurement and control equipment remote control system, characterized in that: Applied to high-precision vehicle-mounted optical measurement equipment, the control system includes: a proximal end installed inside the equipment, a distal end outside the equipment, and an optical fiber connecting the proximal and distal ends. The distal end issues control instructions, which are transmitted to the proximal end via the optical fiber. The proximal end then sends the instructions to a servo control module via a serial port to control the working status and content of the equipment. Simultaneously, the equipment transmits collected image information and working status information to the distal end via the proximal end and the optical fiber. The near end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, an optical module and a wavelength division multiplexer; the digital image converter collects image information from the imaging control module in the device, the digital signal fiber optic converter collects working status information from the information integration system, and the network data fiber optic converter collects network information from the main control computer. The image information, working status information and network information are converted into optical information through the wavelength division multiplexer and optical module and transmitted to the far end; The remote end includes a digital image converter, a digital signal fiber optic converter, a network data fiber optic converter, a wavelength division multiplexer, a monitor, an interactive operation panel, an optical module, and a remote control computer. The wavelength division multiplexer at the remote end receives the image information, working status information, and network information sent by the wavelength division multiplexer at the near end, converts the information into electrical signals through the optical module at the remote end, and sends the electrical signals to the digital image converter, digital signal fiber optic converter, and network data fiber optic converter at the remote end, respectively. The image information is displayed on the monitor. The working status information is displayed on the interactive operation panel, and control instructions to the servo control module are sent by operating the interactive operation panel. The network information is received by the remote control computer to realize interactive processing of network data. The remote end can be integrated into a single equipment box. A duplex communication link is added to the device to receive remote control commands and feedback its own tracking status, while realizing free switching between remote control and local control states. A cyclic code is added to the control command, and the servo control module actively jumps back to the local control state when the received cyclic code is abnormal.

2. The photoelectric measurement and control equipment remote control system according to claim 1, characterized in that: The near end and the far end are connected and data are transmitted in real time via a field optical cable.

3. The photoelectric measurement and control equipment remote control system according to claim 1, characterized in that: The interactive operation panel also includes: a data acquisition card; the data acquisition card is composed of FPGA and ARM; the FPGA is responsible for the acquisition of switch quantities, the driving of the optical module and the transmission verification of internal data; the ARM chip is responsible for the acquisition of single-pole status and interactive screen display control and interactive processing of network data.

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