69 results about "RS-422" patented technology

The invention relates to a device and method for monitoring the tension of an underwater umbilical cable in an ocean device. The device comprises a connecting device, a clamp, a steel cable hanging net and a tension monitoring sensor, wherein the connecting device, the upper end and the lower end of the steel cable hanging net, and the tension monitoring sensor are located on the same plumb line, the connecting device, the clamp and the steel cable hanging net are used for being connected with and fixing the umbilical cable, the tension monitoring sensor is arranged below the connecting device and connected to an instrument bin of a submersible device through a signal line and a watertight connector, a computer in the instrument bin is communicated with a water surface computer through an RS-422 communication interface, and voltage signals of the tension of the umbilical cable are transmitted to the computer in the instrument bin by the tension monitoring sensor and then are transmitted to the water surface computer through the umbilical cable. By means of the method and device, the tension of the underwater umbilical cable can be monitored and is prevented from exceeding a threshold value, necessary information can be provided for the operation of operation personnel in time so that the fatigue cracks of the umbilical cable and the operation accidents of the submersible device can be avoided, and the operation safety of a body of the submersible device can be ensured.

The invention discloses a multi-channel real-time data acquisition system. The system comprises an FPGA controller and a data transmission module. A bidirectional port of the FPGA controller is electrically connected with three A / D converters through control lines. Two of the A / D converters receive control signals processed through a signal conditioning circuit, and the other A / D converter receives a switch signal processed by the signal conditioning circuit. Control signals of the channels are directly subjected to signal conditioning and then parallelly acquired at the high speed by other two A / D conversion circuits. Multiple paths of control signals of other channels are selected through multiple paths of switches, so board area is reduced and hardware resources are saved. The output end of the FPGA controller is connected with a data transmission FPGA control circuit through an LVDS high speed serial communication circuit. Data interaction is achieved for feedback data directly through an RS-422 communication and multi-shaft moving control system. The feedback data is then transmitted to a main control computer at the high speed through a PCI bus, so high-speed large-capacity data detection is achieved and data processing efficiency is improved.

The invention discloses a temperature measuring device based on a tunable light source and a fiber bragg grating. The temperature measuring device comprises an optical module, a fiber bragg grating sensor array and the like. The fiber bragg grating sensor array is connected to the optical module, the optical module is connected with a light source driving module, and the light source driving module is connected with a data acquisition and processing module. The collected and processed signals are sent to a demodulation module for algorithm demodulation, the temperature information after the demodulation is sent to an interface communication module through the data acquisition and processing module and transmitted to an upper computer through an RS-422 to display a measured temperature value in real time. The temperature measuring device is based on a tunable light source principle and has the advantages that the overall temperature measuring device is small in size, high in integration, simple in light path connection and high in reliability, a measuring sensor device is a passive device, and the temperature information of measured points can be transmitted over long distances by optical fibers and integrated with multiple sensors by one fiber; and the temperature measuring device can be applied to different measuring occasions and can avoid the defects of poor anti-electromagnetic interference ability in traditional electrical temperature measurement and the like, the implementation method is flexible and fast, and the universality is high.