383 results about "Twisted pair" patented technology

The invention relates to the technical field of hydropower engineering, and discloses a single-core self-healing type looped network networking method and system, and the method comprises the steps: dividing a whole network into a plurality of sub looped networks; each sub-ring network operates independently; the light switch in each sub-ring network adopts an A / B end connection mode; reversely connecting the B end of the last measuring point to the A end of the initial measuring station by using an optical fiber to form a closed physical structure; configuring a protocol on the switch, and controlling a data flow path through the protocol; different sub-ring networks are connected through RJ45 ports, and a CAT5E shielded twisted pair or an Ethernet interface is used; when a certain node or link fails, the protocol automatically triggers a switching mechanism; the master station optical transceiver monitors the states of all nodes in real time and displays fault points through a network management interface. The system comprises a sub-ring network module, a control data flow module and a fault point display module. The problems that a traditional networking method of hydropower engineering is poor in reliability, and self-healing cannot be achieved after an intermediate node is disconnected are successfully solved.

The invention discloses a multi-channel high-precision water level dynamic real-time monitoring system for a drilling water pumping test, and the system comprises a sensing layer which is used for deploying a multi-source sensor array, inhibiting interference through distributed layout and electromagnetic shielding, collecting multi-dimensional data in real time, and carrying out the preliminary filtering; according to the transmission layer, an optical fiber and twisted pair redundant network is constructed, an EtherCAT protocol is adopted for low-delay transmission, AES-128 encryption tampering prevention is integrated, and edge nodes compress data and verify integrity; the processing layer is used for carrying out real-time preprocessing on edge calculation and switching a standby sensor in abnormal detection; the cloud end predicts the water level trend through Spark Streaming analysis and an LSTM model, distinguishes interference through a random forest algorithm, and outputs calibration data and an analysis report; the application layer is used for constructing a three-dimensional drilling model based on Unity, dynamically displaying water level changes, synchronizing a multi-parameter curve and supporting historical backtracking; the early warning module notifies abnormity through sound and light and short messages, the decision module generates a report and supports multi-drill-hole comparison, and the test strategy is optimized.

The invention provides an analysis method and device for flow, efficiency and water consumption rate of a hydraulic power plant generator set. A distributed flow measurement unit based on a domestic PLC controller and a domestic operating system is constructed, and each unit is independently configured with the flow measurement unit to realize decentralization of data acquisition and processing; active power, guide vane opening, water head difference, instantaneous flow and volute inlet pressure data are collected in real time through a distributed flow measurement unit, and a unit efficiency and water consumption rate calculation model is dynamically fitted based on the data; sending an output result of the calculation model to a monitoring system through an anti-interference communication network, wherein the communication network adopts layered wiring and a double-shielded twisted pair to reduce the signal bit error rate; and the IMC integrated management and control platform is used for remote monitoring and diagnosis of the flow measurement unit, and seamless connection with a smart power plant data medium station is realized. The system reliability and the maintenance flexibility are improved, and the autonomous controllable requirements of domestic substitution and intelligent power plants are comprehensively met.

The invention discloses an insulation residual life prediction algorithm and device based on real-time temperature acquisition and a medium, and relates to the technical field of new energy automobiles, and the method mainly comprises the steps: constructing an offline insulation failure database through an accelerated thermal aging experiment of a twisted pair sample, and recording the PDIV of a target motor at a brand new state room temperature as an initial PDIV0; based on the off-line insulation failure database, obtaining the aging slope of the PDIV decaying along with the aging time at each motor winding temperature and a corresponding aging curve; according to the mapping relation between the PDIV and the motor winding temperature, obtaining an insulation threshold voltage corresponding to the current motor winding temperature under the correction of a temperature correction coefficient; and based on the current PDIV0 and the insulation threshold voltage, substituting the aging curve corresponding to the current motor winding temperature to obtain and output the difference value of the corresponding insulation failure time of the two as the insulation residual life. The method can accurately capture the initial characteristics of insulation aging, the early warning time is advanced, and the timeliness is improved.

An aspect of the present disclosure is directed to a connector. The connector is suited to connectorizing exactly two conductors. The connector includes a forward connector body, a rear connector body, a metal frame and exactly two electrical contacts. The rear connector body interfaces with the forward connector body. Further, the metal frame, which includes a shielding interface, surrounds at least a portion of both the forward and rear connector bodies. The electrical contacts extend from the rear connector body into the forward connector body. A first of the electrical contacts is electrically coupled to a first conductor of a shielded cable and the second of the electrical contacts is electrically coupled to a second conductor of the shielded cable. The shield interface of the metal frame is electrically coupled to the shield of the shielded cable.

The embodiment of the invention provides an electrocardio main cable based on a multi-layer heterogeneous shielding structure and a manufacturing method of the electrocardio main cable, and relates to the field of cables. Comprising a wire core group, a composite shielding layer structure and an outer sheath, the composite shielding layer structure and the outer sheath sequentially wrap the wire core group, the wire core group comprises a plurality of twisted pairs, and each twisted pair is formed by asymmetrically twisting a signal wire and a ground wire; the composite shielding layer structure is composed of a plurality of composite shielding sections which are arranged at intervals along the axial direction of the cable, and a resistive material is filled between the adjacent composite shielding sections; the composite shielding section sequentially comprises a spiral copper foil layer, a silver polyester braid layer and an amorphous silicon carbide coating from inside to outside, and the spiral copper foil layer wraps the outside of the multiple groups of twisted pairs; and the outer sheath is coated outside the amorphous silicon carbide coating. According to the invention, broadband shielding compatibility and pure physical structure noise reduction can be realized, the noise reduction effect is improved without additional electronic components, and the cable is light and low in cost.

The invention discloses a twisted pair crimping system and a twisted pair crimping method. The twisted pair crimping system comprises a cable clamp used for clamping and fixing a twisted pair, and each conductor core of the twisted pair comprises a plurality of conductive wires twisted together; the moving device is used for moving the cable clamp and the twisted pair in the horizontal direction perpendicular to the axial direction of the twisted pair; and the artificial intelligence visual device is arranged at the detection station and can simulate human eyes to identify the actual number of the conductive wires of each conductor core of the twisted pair. And when the artificial intelligence visual device recognizes that the actual number of the conductive wires of the conductor core is not equal to the preset number, the artificial intelligence visual device judges that the twisted pair is unqualified. According to the invention, the artificial intelligence visual device can simulate human eyes to identify the actual number of the conductive wires in the conductor core of the twisted pair. Therefore, whether the quality of the twisted pair is qualified or not can be judged in advance according to the identified actual number of the conductive wires in the conductor core, and the quality of the twisted pair product is improved.

The invention discloses a twisted pair crimping system and a twisted pair crimping method. The twisted pair crimping system comprises a cable clamp used for clamping and fixing a twisted pair; the moving device is used for moving the twisted pair; the artificial intelligence visual device can simulate human eyes to identify the actual positions of the geometric centers of the two conductor cores of the twisted pair moved to the detection station and the actual distance between the geometric centers of the two conductor cores; the position calibration device is suitable for calibrating the crimping position of the twisted pair according to the position deviation between the actual position and the preset ideal position when the actual distance is not smaller than the preset safety distance, so as to eliminate the position deviation; and the crimping device is arranged at the crimping station and is used for crimping the conductor core onto the terminal. When the conductor core is moved to a predetermined crimping position, a geometric center of the conductor core is located on a centerline of the terminal. According to the invention, the crimping position of the conductor core of the twisted pair can be calibrated according to the identified position deviation, and the crimping precision and quality of the twisted pair are improved.

The high-flexibility machine tool drag chain flat type power supply cable comprises a reinforcing core, wires, insulating layers, an inner protective layer, a shielding layer and an outer protective layer, the outer side of the reinforcing core is provided with a plurality of wires in parallel, the outer side of each wire is coated with the insulating layer, two adjacent wires coated with the insulating layers are mutually wound to form a twisted-pair wire unit, and the inner protective layer is coated with the shielding layer. A plurality of twisted-pair wire units are arranged on the outer side of the reinforced core, the reinforced core and all the twisted-pair wire units are wrapped in an inner protective layer, a shielding layer is wrapped on the outer side of the inner protective layer, an outer protective layer is wrapped on the outer side of the shielding layer, and a plurality of reinforced wires are embedded in the outer protective layer. The flexibility of the cable is improved, the degree of freedom of the cable during bending is increased, the bending stress is effectively dispersed, so that the flexibility of the cable is remarkably improved, the internal lead is not easy to damage when the cable is frequently bent along with the movement of the drag chain box due to the design, and the service life of the cable is prolonged.

The invention discloses a differential bus transmission verification system based on a digital ink-jet printer and a printer, and relates to the technical field of printing equipment data transmission, the system comprises a first main control module, a second main control module, 14 pairs of differential signal lines, a downlink channel and an uplink channel, a dynamic verification module adjusts the bit width of a verification code according to the type of a data packet, and the downlink adopts an enhanced CRC algorithm. An odd-even, accumulation and combination algorithm is used for uplink, the algorithm can be switched and retransmission is carried out when continuous error data packets are encountered; a time sequence control module is used for measuring transmission delay, adjusting a clock phase and guaranteeing transmission accuracy; a self-defined bus protocol is divided into three layers; a data packet structure and printing instruction analysis are stipulated; the system has an exception handling mechanism, speed reduction, redundant channel cutting, error recording and diagnosis report generation are performed when verification fails and exceeds a threshold value, a differential signal line is of a twisted-pair structure, signal stability is ensured, and the system is used for connecting a printer with a printing head drive and a motion platform and transmitting a control instruction to ensure reliable and stable data transmission.

The utility model provides a portable twisted pair twisting device. The portable twisted pair twisting device comprises a shell, a driving assembly arranged in the shell, a clamping assembly and a manual opening and closing assembly, the clamping assembly and the manual opening and closing assembly are arranged outside the shell, the manual opening and closing assembly controls the clamping assembly to perform opening and closing actions, and the driving assembly controls the clamping assembly to perform circumferential rotation actions. The manual opening and closing assembly and the driving assembly can control the clamping assembly to act independently or cooperatively. The portable twisted pair twisting device provided by the utility model solves the problems of low efficiency and easy finger scratching of the existing twisted pair untwisting mode.

The invention provides an intelligent temperature control system for an automobile part die-casting die, relates to the field of automobile part manufacturing, and aims to solve the problems that traditional manual temperature control is low in efficiency and poor in precision and cannot meet modern production requirements easily. The system comprises a temperature monitoring, control and execution mechanism and a human-computer interaction interface. The temperature monitoring module is calibrated by a standard platinum resistor temperature source and a least square method to ensure that the measurement is accurate and the deviation meets the requirement, acquires the temperature and converts the temperature into an electric signal, and transmits the electric signal to the temperature control module in the control cabinet of the die-casting machine through a shielded twisted pair. According to the stored die-casting process parameters, a cooling medium flow regulating valve of an executing mechanism regulates the flow speed, and a heating device controls the temperature in a partitioned mode. The man-machine interaction interface supports local and remote operation, displays data in real time and receives instructions, and finally effectively avoids the defects of mold sticking, shrinkage cavities, cracks, poor flowability and the like caused by improper temperature of the casting.

The invention discloses a twisted-pair cable processing system, a twisted-pair cable cutting method and a twisted-pair cable untwisting method. The twisted-pair cable processing system comprises: a frame; and the core wire untwisting device is mounted on the rack and is used for untwisting a pair of exposed core wires of the twisted-pair cable. The core wire untwisting device comprises a mounting plate which is fixed on a rack; the rotating wheel is rotationally mounted on the mounting plate, and a mounting hole penetrating in the axial direction is formed in the rotating wheel; the positioning body is embedded into the mounting hole of the rotating wheel and is provided with a pair of core wire insertion holes; and the driver is used for driving the rotating wheel and the positioning body embedded in the rotating wheel to rotate together. And when the end parts of a pair of exposed core wires of the twisted-pair cable are inserted into the pair of core wire jacks, the driver drives the rotating wheel and the positioning body to rotate so as to untwist the pair of exposed core wires of the twisted-pair cable. Therefore, the untwisting of a pair of core wires of the twisted-pair cable can be automatically realized, and the production efficiency is improved.

The invention discloses a large-scale data center equipment racking system and method based on U-bit control, the system comprises a plurality of rows of cabinets installed in a machine room, the row head cabinet of each row of cabinets is provided with an RTU data collector, the RTU data collectors are connected with an access switch installed in the machine through twisted pairs, and the access switch is connected with a data center through a data line. The access switch is connected with a data server installed in a monitoring room through an optical fiber. A handheld scanning server wirelessly connected with the data server is arranged in the monitoring room, the handheld scanning server is wirelessly connected with a scanning gun, the scanning gun is used for scanning a two-dimensional code of equipment to be loaded and transmitting recognized information to the handheld scanning server, and the handheld scanning server transmits analyzed information to the data server; and the data server stores the information of the shelved equipment, and allocates an optimal shelving position for the equipment to be shelved according to the information transmitted by the handheld scanning server. According to the invention, the rationality of large-scale data center equipment distribution is improved, the overall load is more balanced, and the loss of cables is reduced.

The invention belongs to the technical field of synchronous control, and particularly relates to a synchronous control system and method for vibration suppression and quality monitoring of twisted pairs, and the method comprises the following steps: S1, obtaining the measurement data of an acceleration sensor and a laser displacement sensor array on a twisted pair production line, a real-time vibration vector field of the twisted pair in the monitoring area is constructed through data fusion; based on the real-time vibration vector field, utilizing a Hamiltonian agent model to predict the vibration energy state of the twisted pair in a future prediction time window; and S2, adjusting a weight coefficient for minimizing the weighted sum of the predicted vibration energy and the control increment norm in real time according to the twisting quality characteristic index calculated in the previous control period. According to the method, conversion from passive response to active predictive suppression is realized, optimal control measures can be taken before vibration deterioration, and the timeliness of vibration suppression is improved.

The invention discloses a twisted-pair cable posture adjusting method and a twisted-pair cable processing method. The twisted-pair cable attitude adjustment method comprises the following steps: shooting an image of an end face of a twisted-pair cable; calculating the attitude of the twisted-pair core wire of the twisted-pair cable at the end surface according to the shot image; calculating the initial attitude of the twisted-pair core wire at the cutting position of the outer coating layer to be stripped according to the attitude of the twisted-pair core wire at the end surface, the length of the outer coating layer to be stripped from the twisted-pair cable and the twist pitch of the twisted-pair cable; according to the initial attitude of the twisted-pair core wire and the predetermined attitude of the twisted-pair core wire, calculating an adjustment angle of the twisted-pair cable needing to be rotated; and rotating the twisted-pair cable around the central axis of the twisted-pair cable to adjust the angle, so that the twisted-pair core wire is adjusted to a preset posture. According to the invention, before the outer coating layer of the twisted-pair cable is stripped, the adjustment angle required to be rotated for adjusting the twisted-pair core wire of the twisted-pair cable to the predetermined attitude can be accurately obtained, and the processing efficiency and precision of the twisted-pair cable are improved.

The invention discloses a twisted-pair cable processing system and a twisted-pair cable cutting method. The twisted-pair cable processing system comprises: a frame; and the core wire cutting device is mounted on the rack and is used for cutting a pair of exposed and untwisted core wires of the twisted-pair cable. The core wire cutting device comprises a positioning body which is provided with a cable jack allowing one end of a twisted-pair cable to be inserted and a pair of core wire jacks allowing a pair of exposed core wires of the twisted-pair cable to pass through; and the cutting tool is arranged behind the positioning body and is used for cutting a pair of exposed core wires of the twisted-pair cable. A positioning reference surface perpendicular to the axial direction of the core wire jack is formed in the cable jack, and the positioning reference surface is used for being axially attached to the cutting end face of the outer coating layer of the twisted-pair cable so as to axially position the twisted-pair cable and ensure that a pair of exposed core wires of the cut twisted-pair cable have a preset length.

The utility model discloses a novel civil air defense three-proofing control device, which is characterized in that three state instructions of clean ventilation, poison filtering ventilation and isolated ventilation, which are sent by an upper computer of a civil air defense ventilation mode control box and are received from an RS485 twisted-pair communication bus, are transmitted to an RS485 twisted-pair communication bus through a programmable controller; an action program of a civil air defense tail end control box-lower computer is compiled, and is downloaded to a control loop of each electric actuating mechanism, so as to control the opening and closing of a civil air defense fan, a civil air defense air valve and a civil air defense sewage pump; and meanwhile, operation state parameters of each electric actuating mechanism are fed back to a civil air defense ventilation mode control box-an upper computer, a civil air defense three-proofing control device and a civil air defense tail end control box-a lower computer through an RS485 twisted-pair communication bus, so that the whole control closed loop of the civil air defense control system is completed.

The present invention discloses a visible light communication device based on a power line carrier circuit and a communication method thereof. The device includes: an Ethernet interface circuit, a power line carrier circuit, a switching switch, a signal attenuation circuit, a light source driving circuit, a light source, an avalanche photodiode, a photoelectric conversion circuit, a linear amplifier circuit, and a power detection circuit. The switching switch can switch the signal transmission mode from visible light communication to power line communication when the optical communication quality is poor, thereby improving the stability of the communication system. The power line carrier circuit modulates the signal in various ways, including OFDM, QPSK, BPSK, and ROBO. Compared with traditional visible light communication systems using OOK modulation, the communication rate and stability are significantly improved. The power detection circuit, the signal attenuation circuit, and the light source driving circuit cooperate to effectively control the power of the transmitted signal, enabling the signal to be transmitted without distortion. In addition, the power line can be replaced with a wire, twisted pair, etc., further improving the anti-interference capability and mobility.

To provide a connector structure which can prevent degradation in terminal holding force for an outer terminal and in electrical connection reliability between the outer terminal and a braid, in a shield connector using a twisted pair wire.SOLUTION: A connector structure comprises: an inner sleeve 6 which has a front crimping part 60 located on an end side of a shield wire 10 so as to be caulked in an overlapping manner and a rear crimping part 64 that has an outer shape smaller than that of the front crimping part 60 and is located on a depth side of the front crimping part 60, and which is disposed over an outer peripheral side of a braid 13 exposed from an end of a sheath 14; and an outer terminal 21 having a shield body 22 which covers an outer periphery of an inner housing 4 for housing an inner terminal, and a caulking part 23 which extends from the shield body 22, and is provided with a first crimping part 25 and a second crimping part 27 respectively crimped to outer peripheral shapes of the front crimping part 60 and the rear crimping part 64 so as to be electrically connected to a folded portion 13a of the braid 13 that is folded back and disposed over an outer peripheral side of the inner sleeve 6.SELECTED DRAWING: Figure 8

The utility model provides a differential circuit structure and electronic equipment, and belongs to the technical field of differential circuits. The differential circuit structure comprises a terminating component which comprises a first port and a second port, the two ports respectively comprise a first wiring terminal, a second wiring terminal, a first metal ring and a second metal ring, and the two metal rings are respectively used for grounding; the wire twisting part comprises a ground wire, and a first signal wire and a second signal wire which spirally surround the ground wire respectively; the first end of the first signal line is connected with the first wiring terminal on the first port, and the second end of the first signal line is electrically connected with the first wiring terminal on the second port; the first end of the second signal wire is connected with the second wiring terminal on the first port, the second end of the second signal wire is electrically connected with the second wiring terminal on the second port, and the two ends of the ground wire are grounded respectively. Compared with a common twisted pair, the differential line structure can reduce electromagnetic radiation more reliably.

Methods of design, manufacture and implementations of balanced twisted pair cables with a barrier tape or shield, with tuned attenuation, impedance, and coupling properties. A filler is included within the cable to separate the pairs and provide a support base for the shield, allowing for optimized ground plane uniformity and stability for tuned attenuation, impedance, and coupling properties. The filler orientation, shape, and size provides support for the shield such that a gap is provided between the shield and the twisted pairs with a given minimum size without increasing the maximum cable core size. The length of arms of the filler may be adjusted to fine-tune the size and shape of this gap and control air-dielectric volume and radial contact or spacing between any pair(s) and the shield, tuning electrical performance characteristics caused by non-linear effects of electromagnetic interactions at short ranges between the pairs, shield, filler, or other components.

The utility model discloses a flexible high frequency data cable, include: conductor, the extrusion of conductor has PE insulating layer and forms core, is provided with foamed layer on PE insulating layer, the thickness of foamed layer accounts for 75% of PE insulating layer total thickness, and the foaming rate of foamed layer is 60%~65%, and every two core wire pairs form a pair of double -twisted pair, and the twisting pitch of every pair of double -twisted pair is different, and the aluminium -plastic composite tape is wrapped on double -twisted pair, and four pairs of double -twisted pair with aluminium -plastic composite tape are twisted into cable core, and the overlap gap of aluminium -plastic composite tape on each double -twisted pair all faces outward, and the tinned copper wire braid is woven on cable core, and the tinned copper wire braid covers and presses on the overlap gap of aluminium -plastic composite tape, and the weaving density of tinned copper wire braid is 70%, and the tape is wrapped on tinned copper wire braid, and the sheath is extruded on tape. The utility model can prevent the signal crosstalk between double -twisted pair without heat sealing to aluminium -plastic composite tape, thereby protecting PE insulating layer from being damaged.

The utility model relates to the technical field of mutual inductors in electrical equipment, in particular to an integrated sleeve type electronic current transformer. Comprising an insulation packaging structure, a conducting rod, a current measuring module and a capacitance monitoring module, the insulation packaging structure is a fully-sealed sleeve-shaped epoxy resin shell formed by pouring epoxy resin, a wiring platform is arranged on the side face of the epoxy resin shell, the conducting rod axially penetrates through the insulation packaging structure, and the two ends of the conducting rod are exposed; the capacitance monitoring module comprises a capacitance wiring terminal and a capacitance induction net, the capacitance induction net sleeves the outer side of the conducting rod, the capacitance induction net and the conducting rod form a monitoring capacitor, and the capacitance wiring terminal is arranged on the wiring platform and is connected with the capacitance induction net; the current measuring module comprises a coil device body and a current shielding twisted pair, the coil device body is sleeved on the outer side of the capacitance induction net, and the current shielding twisted pair is connected with the coil device body. The current measuring and capacitance state monitoring device integrates functions of current measurement and capacitance state monitoring, and is highly compact in structure and low in cost.

The utility model discloses a high-speed serial bus transmission circuit, which comprises a main control circuit, and the main control circuit comprises an FPGA (field programmable gate array), a CLKIO (clock line input / output), a DATAIO (data address input / output) and an LTC2879XMS8E chip. An acquisition node circuit, wherein the acquisition node circuit comprises an FPGA (Field Programmable Gate Array), a CLKIO, a DATAIO and an LTC2879XMS8E chip; and a level conversion circuit, wherein the level conversion circuit comprises a resistor and an LTC2879XMS8E chip. According to the utility model, the circuit structure design is optimized, through the arrangement of the master control circuit, the acquisition node circuit and the level conversion circuit, the communication between one master control and a plurality of acquisition nodes is realized, the acquisition nodes are distinguished by different addresses, the communication efficiency is high, the external common-mode noise can be completely counteracted, and the reliability is high. Signals are transmitted in a differential mode, the anti-interference capacity of communication is improved, the structural design that the two sets of shielding twisted pairs are combined is adopted, the two wires are close to each other and equal in signal amplitude, the amplitudes of coupling electromagnetic fields between the two wires and the ground wire are also equal, the signal polarities of the two wires and the ground wire are opposite, and according to the right-hand spiral rule, the signal polarities of the two wires are different. The magnetic lines of force are mutually offset, and the anti-electromagnetic interference capability is strong.

The invention discloses a subminiature three-coaxial differential self-locking high-temperature-resistant assembly and a connector, and relates to the technical field of radio frequency connectors, the subminiature three-coaxial differential self-locking high-temperature-resistant assembly comprises a shell, an outer shield is arranged in the shell, an outer insulator is arranged on the inner side of the outer shield, and an inner shield is arranged on the inner side of the outer insulator. According to the subminiature three-coaxial differential self-locking high-temperature-resistant assembly and the connector, efficient electromagnetic isolation is formed by the double shielding layers composed of the outer shielding layer and the inner shielding layer and the inner conductor, radio frequency leakage and signal crosstalk can be remarkably inhibited through cooperative use of the structures, the problem that a traditional double-coaxial structure is insufficient in shielding is solved, and meanwhile, the connector is high in reliability. The inner shielding layer and the outer shielding layer of the twisted pair are respectively welded with the inner shielding layer and the outer shielding layer, the continuity of the shielding effect is ensured, the connecting seat is made by sintering glass powder and is provided with a conductive silver powder sealing ring, the stability at high temperature is ensured, good grounding continuity is also provided, and the overall electromagnetic compatibility performance is further enhanced.

This invention provides a single-ended impedance detection method for conductive cables based on current source excitation, applicable to detecting the resistance and self-inductance of conductive cables of any material, length, and diameter. The method divides the conductive cable into two bundles (e.g., in twisted-pair applications). By injecting a current source excitation signal near the cable end, the voltage and current at the near end are detected, yielding the cable's resistance and self-inductance parameters. This invention eliminates the need for auxiliary components at the load end, accurately obtains cable resistance and self-inductance values, has simple logic, is easy to implement, and can be applied to any power supply system.

The invention provides a transmitting end, a receiving end, and a signal transmission system and method. Relates to the technical field of data transmission, and a transmitting end receives one or more of an HDMI signal, a USB signal, a control signal and a power supply signal through a corresponding interface. Each signal is converted into a plurality of signals transmitted by an adaptive network cable based on a processing chip or a processing module corresponding to the sending end; a chip for processing HDMI signals and a chip for processing USB signals are integrated on the main control board of the sending end, and the receiving end is similar to the chip, so that the cost is reduced. Furthermore, the plurality of signals are transmitted to a receiving end in a signal partition manner through a network cable comprising a plurality of pairs of twisted pairs, so that the receiving end restores and outputs the signals received and separated from the network cable through corresponding processing chips or processing modules, for an HDMI signal sending end, the HDMI signal is converted into a target format, and a compressed signal is compressed, output and transmitted to a receiving end through a network cable, so that the cost is reduced, HDMI and USB signals are simultaneously transmitted through a single network cable, and wiring is reduced.

The invention relates to a reaction flywheel control method based on a 422 communication protocol. The reaction flywheel control method comprises the steps that S11, an MOXA card is adopted as a communication interface between an upper computer and a reaction flywheel; s12, the MOXA card is connected with a flywheel controller through a shielded twisted pair; s21, the upper computer runs LabVIEW software, a special telemetering instruction analysis module is embedded, received 8-byte or 32-byte data frames are analyzed in real time, and flywheel rotating speed, torque and current parameters are extracted; s22, the upper computer sends an 8-byte control instruction, and the flywheel returns a response frame containing real-time data; s31, a control interface is developed based on LabVIEW, instruction coding and sending functions are achieved, data analysis and display functions are achieved, and a real-time monitoring function is achieved; s41, the upper computer sends an equipment ID verification instruction to confirm that the flywheel is online; s42, the running state of the flywheel is adjusted through the instruction code; and S43, periodically sending a D9 instruction to obtain real-time data, and updating and displaying the LabVIEW interface and storing historical data.

The utility model provides a combination line which comprises a total port which is connected with a communication port through at least two groups of twisted pairs serving as communication lines and is connected with a data port through at least one group of twisted pairs serving as data lines. Comprising an anti-abrasion adhesive tape, and the anti-abrasion adhesive tape wraps the communication line and / or the data line and / or the communication line and the data line. Wiring is simplified, the number of needed cables is reduced, cost is reduced, efficiency is improved, and space layout is optimized.