34results about How to "High speed conversion" patented technology

A piezoelectric element (2) composed of a reflective element (1), a thin film piezoelectric body (3), electrodes (4a, 4b, 4c), and an elastic body (5) is formed on a substrate (7). Voltage, the thin-film piezoelectric body deflects and deforms, driving the reflective element. A plurality of piezoelectric elements are arranged in parallel along the longitudinal direction (8), and a torsion spring (6) is arranged in a direction perpendicular to the longitudinal direction to connect and maintain the reflective element on the substrate. Furthermore, the reflective element is connected to the piezoelectric element through the strain absorbing part (10). According to this configuration, the torsion spring is used as the rotation axis (9), and the reflection element is tilted about the rotation axis.

The invention discloses an ASK-FSK converter and a conversion method, which relate to the field of optical communication and are invented for solving the problem that fast conversion of an ASK opticalsignal into an FSK optical signal cannot be realized in the prior art. The embodiment of the invention provides the ASK-FSK converter, which comprises a beam splitter, a light generator, a first optical coupler, a polarization modulator and a second optical coupler. Based on the ASK-FSK converter, the ASK optical signal can be split into two paths, wherein one path of the ASK optical signal interacts with continuous polarized light in the polarization modulator to change the polarization state of the polarized light to convert the polarized light into an optical signal which is logically opposite to the ASK optical signal has a frequency different from that of the ASK optical signal; and then the optical signal which is logically opposite to the ASK optical signal is coupled with the other path of the ASK optical signal to obtain the FSK optical signal. The converter and the method are suitable for fast conversion of the ASK optical signal into the FSK optical signal.

The invention relates to a system and method for expanding peripheral interfaces of an intelligent terminal. According to the system and method, an embedded integrated circuit and a USB-HUB expanding unit are adopted and through circuit debugging and software programming and under the condition that the system and the interfaces of the intelligent terminal are not changed at all, the system and method for expanding the peripheral interfaces of the intelligent terminal through USB interfaces are developed. According to the scheme, a standard USB-OTG protocol on the standard intelligent terminal is adopted and the expansion interfaces are communicated with the intelligent terminal in the mode of a USB-HID device, so that difficulty of secondary development of the intelligent terminal is greatly lowered, the speed of secondary development is increased, customization cost of the intelligent terminal is saved, and product cost is reduced.

A linear power driving controller based on large-power operational amplifier for a three-phase alternating current motor consists of a linear power driving module, a signal detecting module, a digital control module and a digital-analogue (D / A) converting module. The signal detecting module detects a motor three-phase winding current signal and a motor rotor position signal, converts the signals into signals which can be directly received by the signal detecting module and transmits the signals to the signal detecting module. The signal detecting module finishes calculation of a control algorithm according to received motor state information and gives a digital quantity control signal. The D / A converting module converts the digital quantity control signal into an analog quantity control signal and transmits the analog quantity control signal to the linear power driving module. The linear power driving module isolates the analog quantity control signal and a power level signal, further performs power amplification, provides high voltage and large current for a motor winding and accordingly achieves high-precision control of the three-phase alternating current motor. The linear power driving controller has good application prospect in the technical field of electric motor automatic control.

A PLM fourth-generation intelligent boiler control instrument (PLM4 intelligent boiler control instrument) resolves the problem that the intelligent boiler control products with non-standard design are incapable of realizing mass production for industrial boiler intelligent controllers. In addition, with years of experiences in developing and producing intelligent boiler control instruments, by standardizing thousands of common solutions for boiler intelligent control, and based on control characteristics of various industrial boilers below 25T / H and intelligent control technical specifications of the industrial boilers, a novel standardized industrial boiler intelligent control core product adaptable to mass production is developed by our company, which simplifies and popularizes complicated production of industrial boiler intelligent control products. Any boiler controller manufacturer utilizing the PLM fourth-generation intelligent boiler control instrument as the industrial boiler intelligent control core can avoid the completed development of intelligent control products, can conveniently produce industrial boiler intelligent control cabinets, and greatly reduces cost and increases reliability of the products through mass and automatic production.

The invention relates to a multichannel high-collection-speed temperature measurement system. The system comprises a thermocouple, a temperature transmitter, a data switching board card, a filtering circuit board card, a high-frequency data collection board card and a computer terminal; and the thermocouple implements positioning on a sand mold surface via a positioner, and is connected with one end of the temperature transmitter, the other end of the temperature transmitter is connected to independent filtering circuits in the filtering circuit board card via different channels of the data switching board card, each independent filtering circuit is connected to different channels of the high-frequency data collection board card, and a USB interface of the high-frequency data collection board card is connected with the computer terminal installed with data collection and conversion software. The temperature measurement system can satisfy requirements of high speed and multiple points for temperature measurement in practical production application. Due to the characteristics of multiple channels and high collection speed of the system, many data points can be collected, the obtained data bulk is large, and result analysis and calculation are more comprehensive and reliable. An electromotive force is converted to temperature data in software, the obtained result represents a temperature value, the data processing time is reduced, and the working efficiency is improved.

The invention discloses a high-speed three-state ADC (Analog-to-Digital Converter), which belongs to the technical field of analog-to-digital conversion of electronic signals. When a switch of a capacitance source works at a high frequency, high-speed sampling on input and output of the capacitance source is realized, and the output voltage and current quality of the capacitance source is improved. An analog signal Ui is converted into a high-level clamping comparison signal VH and a low-level clamping comparison signal VL according to different proportions respectively, and the voltage value of the VH is higher than that of VL; reference voltages Vh and VI compared with the VH and VL are set in logic and structure respectively; when VH is greater than Vh, Po is equal to 1; when VL is smaller than VI, Po is equal to 0; when VH is smaller than Vh and VL is greater than VI, Po is equal to Pi; input Uih corresponding to the Vh and input Uil corresponding to the VI form a voltage interval of the analog signal. According to the high-speed sampling applied to the constant-voltage output and constant-current output of the capacitance source, a plurality of structures of different voltage intervals are combined to realize high-speed ADC application of continuous voltage signal sampling and the like.

The invention belongs to the technical field of optical fiber communication, and provides a bidirectional optical fiber receiving-transmitting circuit and a bidirectional optical fiber receiver-transmitter. The bidirectional optical fiber receiving-transmitting circuit in the invention comprises a luminescence module, a first optical processing module, a driving module, a modulation module, a wavelength-division multiplexing module, a second optical processing module, a photoelectric conversion module and an amplification module; at a transmitting terminal, an electrical signal is sent to a remote receiving device via an optical fiber after being converted into an optical signal; and at a receiving terminal, the optical signal received by the optical fiber is output after being converted into the electrical signal. The conversion and the transmission of a high-speed signal are implemented by the bidirectional optical fiber receiving-transmitting circuit on one optical fiber by adopting a silicon photonics technology, the cost is low and the yield rate is high; and thus, the problems that the existing receiver-transmitter has low yield rate and high cost, and the improvement of a transmission rate of the fiber to the home is affected due to the high cost are solved.

The invention discloses a double-phase coefficient adjustable analog multiplication calculation circuit for a convolutional neural network, and belongs to the technical field of calculation, reckoningand counting. The multiplication calculation circuit comprises a current type network digital-to-analog conversion module, a double-phase coefficient adjustable analog multiplication array, a pipelined analog-to-digital conversion module and a calculation unit control module, a discrete time circuit structure is adopted to achieve multiplication calculation of a neural network layer, signed multiplier design is newly added to provide forward control and negative control, multiplication with sign bits can be achieved, and voltage amplitude in a wider range is provided.

The invention provides a time domain A / D converter group that comprises a plurality of A / D converters. Each A / D converter comprises: a delay lock loop circuit, which takes a main clock supplying a clock to an integrated circuit as an input, performs frequency division on the main clock to output a multi-phase clock with different time sequences; a logic circuit, which synthesizes a plurality of clocks corresponding to Gray codes according to the multi-phase clock; and a plurality of A / D converters next to each other in space. The delay lock loop circuit and the logic circuit are dispersed in the integrated circuit; the A / D converters supply multiple clocks to one A / D converter module; each A / D converter comprises a comparator that compares an input signal with a reference voltage to generate a comparison output signal and an internal A / D converter; and the internal A / D converter comprises a latch, which maintains the logic state of the multi-phase clock according to the time sequence provided by the comparison output signal and a counter, which counts the clock having the largest width of the plurality of clocks and stops counting according to the comparator.

The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibres; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers,one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank.

Individual A / D converters constituting a time domain A / D converter group according to an embodiment of the present invention each comprises: a reference voltage selection circuit that is connected toa reference signal generation circuit for generating a first reference signal to sweep a full-scale range and a second reference signal to periodically sweep a limited voltage range a plurality of times and that switches between the first and second reference signals that are outputs of the reference signal generation circuit; a comparator that compares the first or second reference signal selected by the reference voltage selection circuit with an input signal; an internal A / D converter that implements an A / D conversion by use of a comparison output signal from the comparator; and a cumulative adder-subtracter that, if the second reference signal has been selected, outputs a signal obtained by averaging A / D conversion values obtained from the A / D conversion.

The invention provides a PVC switching control method for an ATM communication network which allows high speed changeover of a connection upon occurrence of / release from a trouble and is superior in reliability and maintenance facility and simple in control. A master PVC connection and an OAM connection are set between two ATM exchanges, and a bypassing PVC connection and an OAM connection prepared in advance for bypassing are set between the two ATM exchanges. If occurrence of / release from a trouble with and of the master PVC connection is recognized by the ATM exchanges using an OAM function, then the operative PVC connection is switched between the master PVC connection and the bypassing PVC connection.

The invention provides a PVC switching control method for an ATM communication network which allows high speed changeover of a connection upon occurrence of / release from a trouble and is superior in reliability and maintenance facility and simple in control. A master PVC connection and an OAM connection are set between two ATM exchanges, and a bypassing PVC connection and an OAM connection prepared in advance for bypassing are set between the two ATM exchanges. If occurrence of / release from a trouble with and of the master PVC connection is recognized by the ATM exchanges using an OAM function, then the operative PVC connection is switched between the master PVC connection and the bypassing PVC connection.

The invention discloses an adaptive protocol conversion system for high-voltage direct-current measurement and a using method thereof, and belongs to the technical field of power communication and automation. The adaptive protocol conversion system comprises a photoelectric conversion module, a protocol conversion unit and a communication interface module. The adaptive protocol conversion system can receive optical digital signals of various IEC60044-8 communication protocols such as standard FT3 and state grid FT3 data frame formats specified by IEC60044-8, and convert the optical digital signals into IEC61850-9-1, IEC61850-9-2LE and state grid IEC61850-9-2 network digital message signals meeting the IEC61850-9 standard in a high-speed, stable and real-time manner for optical digital protection, control, metering, measurement and test equipment. The protocol conversion system has the functions of intelligently identifying the Baud rate, the sampling rate, the link layer length and thenumber of check bytes of an input signal, has high-speed, stable and real-time conversion performance, and is widely applied to testing and verification of intelligent substations, converter stationmeasurement systems and digital equipment.

The invention provides a level shift circuit, and a driver and a display device using the same. The level shift circuit includes a first circuit connected between a first power supply terminal (PST) and an output terminal (OT) of the level shift circuit to set OT to a first voltage (V1) when conducting, a second circuit connected between a second PST and OT to set OT to the second voltage (V2) when conducting, and a third circuit that receives an input signal and a feedback signal from OT so that, when OT=V2 and input=a third voltage (V3), the first circuit conducts, and when OT=V1, the first circuit is made nonconductive irrespective of the value of the input signal. The second circuit is made conductive and nonconductive when the reverse-phase signal of the input signal is equal to V3 and the reverse-phase signal of the input signal is equal to a fourth voltage (V4), wherein V2<=V4<V3<V1.

The invention relates to an automatic high-speed metal tube cutting machine. The automatic high-speed metal tube cutting machine comprises a machine frame assembly and a shearing machine assembly. A lower hydraulic cylinder assembly is arranged at the bottom of the shearing machine assembly. A side hydraulic cylinder assembly is arranged on a side face of the shearing machine assembly. The shearing machine assembly comprises a main machine base, wherein an inner floating cutter assembly, an inner fixed cutter assembly, an outer floating cutter assembly and an outer fixing cutter assembly are arranged in the main machine base. The outer floating cutter assembly is sleeved with an upward-downward moving die and a leftward-rightward moving die, wherein the leftward-rightward moving die and the upward-downward moving die are tightly buckled, the lower surface of the upward-downward moving die is fixedly connected with a first piston rod of the lower hydraulic cylinder assembly, and a side face of the leftward-rightward moving die is fixedly connected with a second piston rod of the side hydraulic cylinder assembly. The automatic high-speed metal tube cutting machine has the advantages that no scrap iron exists, one time of cutting is completed within three seconds, noise is low, shearing accuracy is high, automatic cutting can be achieved, the automatic high-speed metal tube cutting machine is suitable for shearing workpieces with the fixed size and any lengths in batches, use is safe, man-machine work efficiency is high, the structure is firm, rigidity is high, vibration is small, the cutting size can be converted at a high speed, and operation and maintenance are easy and convenient.

The invention discloses a high-energy-efficiency and high-precision orthogonal two-frequency divider. The orthogonal two-frequency divider is characterized that a first orthogonal unit and a second orthogonal unit are connected to form a loop. The first orthogonal unit and the second orthogonal unit are simultaneously controlled by differential input clock signals. The connection modes and control time sequences of the differential input clock signals in the first orthogonal unit and the second orthogonal unit are opposite to each other. Orthogonal two-frequency division signals are obtained at the positive output end OUT1 and negative output end OUTB1 of the first orthogonal unit, and the positive output end OUT2 and the negative OUTB2 of the second orthogonal unit. The orthogonal two-frequency divider is based on a digital circuit structure; no passive device and tail current source are employed; high-speed conversion can be obtained under a low power source voltage in high energy efficiency; and the orthogonal two-frequency divider has the advantages of technological flexibility and portability.

The present invention relates to a formula (II) shown hydrindene-1,3-dione compound catalysis synthetic method which is as follows: in an organic solvent and under a nitrogen atmosphere, in the presence of a catalyst, an oxidant, and an organic ligand and an adjuvant, self cyclization of a formula (I) compound is performed, the formula (II) compound is obtained by after-treatment after the end of the reaction, the method uses the new catalyst, the oxidant, the organic ligand, the organic solvent and the adjuvant for comprehensive selection and optimization to achieve material high-speed conversion, the yield of the target product can be greatly improved, the needs of industrial production can be better met, and the method has a broad market prospect.

The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibers; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank.

The invention provides a communication unit for converting an EtherCAT slave station into a Canopen master station on the basis of a DSP (Digital Signal Processor). The communication unit comprises an FPGA (Field Programmable Gate Array) chip, a DSP unit, and a CAN (Controller Area Network) module, wherein an EtherCAT protocol stack is embedded into the FPGA chip; the FPGA chip is used for completing capturing and splitting of an EtherCAT data frame and state monitoring of related state machines, and carries out data transmission with the DSP unit by a serial data bus; the DSP unit comprises an EtherCAT slave station data analysis algorithm unit, a process protocol conversion module and a CANopen master station protocol stack unit; and the CAN module is used for completing supporting and communication on the CANopen master station protocol stack unit of the DSP unit. The communication unit provided by the invention has the characteristics of high-speed calculation, high-speed conversion and the like, and efficiently completes addition of power electronic equipment only with a Canopen communication interface into an EtherCAT control looped network.

The invention discloses a novel servo motor test system. The servo motor test system includes an industrial control computer and a tested motor driver, a motor driving power supply, a data acquisition module, a power analyzer and a load motor driver which are connected with the industrial control computer. The tested motor driver is electrically connected with the motor driver, the other end of the data acquisition module is connected to a tested motor, the power analyzer is connected to a rotating speed and torque driver, the load motor diver is connected to a load motor and an energy feedback type load, and the power analyzer is electrically connected with the tested motor. A motor and driver analyzer adopts 3 power board cards for testing the input electrical parameters of the tested motor, a motor test board card is used for testing the torque and rotating speed output by the motor, and a servo motor achieves the effects of high control precision and fast response speed.

An information recording medium wherein a stream, which is recorded in a control format allowing format conversion from a first format (MPEG-TS) to a second format (MPEG-PS) and is seamlessly connected, can be converted into a second stream, and an apparatus and a method for recording information in the information recording medium. The control format is provided for converting the first format (for instance, MPEG transport stream) into the second format (for instance, MPEG program stream). Seamless reproduction is performed by using a third system stream (Bridge VOB), which is composed of each of the parts of the two seamlessly connected system streams. A video information reproduction time by data control unit (Capsule) at a third system stream start is 0.4 second or more but less than 1 second, according to the control format.

The invention discloses an on-chip transformer capable of isolating voltage multiplication. A single-channel and double-channel high-side channel transformer architecture comprises a charge pump module, a bootstrap module and an N-stage transformer module, a single channel comprises N+1 tube cores, a first-stage transformer module signal modulation unit is arranged in the first tube core, a power supply voltage is a low-voltage power supply, and reference ground is a ground voltage; an ith-stage transformer module signal modulation unit and an (i-1)th-stage transformer module signal demodulation unit are arranged in the ith tube core, the reference ground is an ith power supply, and the power supply voltage is a signal generated after the ith power supply is lifted by a low-voltage power supply by the charge pump module; an Nth-stage transformer module signal demodulation unit is arranged in the (N+1)th tube core, the reference ground is floating ground, and the power supply voltage is a signal generated after the bootstrap module lifts the floating ground by one low-voltage power supply; and the double-channel low-side channel transformer architecture comprises N stages of transformer modules which are distributed in the N+1 tube cores, the tube core power supply voltage of the low-side channel is a low-voltage power supply, and the reference ground is the ground voltage.

The invention discloses an NAT method and system based on the mobile Internet. The method is achieved through mixed NAT mapping of mapping of a static IP address and mapping of a dynamic port. The method includes the steps that NAT is called at the exit of an IP layer and NAT is called at the entrance of the IP layer; NAT is called at the exit of the IP layer to transmit a data package to an NAT router; whether a routing table entry comprising the destination IP address of the data package exists or not is checked; whether an NAT table entry comprising an interior local IP address and an interior global IP address exists in an NAT address mapping table of a resource pool or not is checked; NAT is called at the entrance of the IP layer to transmit the data package to the NAT router; whether the routing table entry comprising the destination IP address of the data package exists or not is checked; whether a HASH table entry comprising an interior global IP address and an interior local IP address exists in the NAT address mapping table of the resource pool or not is checked. The NAT method and system based on the mobile Internet can easily identify a mobile communication terminal user and can perform user access source tracing and analysis.

The invention discloses a high-speed three-state ADC (Analog-to-Digital Converter), which belongs to the technical field of analog-to-digital conversion of electronic signals. When a switch of a capacitance source works at a high frequency, high-speed sampling on input and output of the capacitance source is realized, and the output voltage and current quality of the capacitance source is improved. An analog signal Ui is converted into a high-level clamping comparison signal VH and a low-level clamping comparison signal VL according to different proportions respectively, and the voltage value of the VH is higher than that of VL; reference voltages Vh and VI compared with the VH and VL are set in logic and structure respectively; when VH is greater than Vh, Po is equal to 1; when VL is smaller than VI, Po is equal to 0; when VH is smaller than Vh and VL is greater than VI, Po is equal to Pi; input Uih corresponding to the Vh and input Uil corresponding to the VI form a voltage interval of the analog signal. According to the high-speed sampling applied to the constant-voltage output and constant-current output of the capacitance source, a plurality of structures of different voltage intervals are combined to realize high-speed ADC application of continuous voltage signal sampling and the like.

A level shift circuit includes a first circuit connected between a first power supply terminal (PST) and an output terminal (OT) of the level shift circuit to set OT to a first voltage (V1) when conducting, a second circuit connected between a second PST and OT to set OT to the second voltage (V2) when conducting, and a third circuit that receives an input signal and a feedback signal from OT so that, when OT=V2 and input=a third voltage (V3), the first circuit conducts, and when OT=V1, the first circuit is made nonconductive irrespective of the value of the input signal. The second circuit is made conductive and nonconductive, when the input=a fourth voltage (V4) and V3, respectively. A high / low relationship of V1, V2=that of V3, V4. The input between V3, V4 has a lower amplitude than the output signal between V1, V2.

The invention relates to an automatic high-speed metal tube cutting machine. The automatic high-speed metal tube cutting machine comprises a machine frame assembly and a shearing machine assembly. A lower hydraulic cylinder assembly is arranged at the bottom of the shearing machine assembly. A side hydraulic cylinder assembly is arranged on a side face of the shearing machine assembly. The shearing machine assembly comprises a main machine base, wherein an inner floating cutter assembly, an inner fixed cutter assembly, an outer floating cutter assembly and an outer fixing cutter assembly are arranged in the main machine base. The outer floating cutter assembly is sleeved with an upward-downward moving die and a leftward-rightward moving die, wherein the leftward-rightward moving die and the upward-downward moving die are tightly buckled, the lower surface of the upward-downward moving die is fixedly connected with a first piston rod of the lower hydraulic cylinder assembly, and a side face of the leftward-rightward moving die is fixedly connected with a second piston rod of the side hydraulic cylinder assembly. The automatic high-speed metal tube cutting machine has the advantages that no scrap iron exists, one time of cutting is completed within three seconds, noise is low, shearing accuracy is high, automatic cutting can be achieved, the automatic high-speed metal tube cutting machine is suitable for shearing workpieces with the fixed size and any lengths in batches, use is safe, man-machine work efficiency is high, the structure is firm, rigidity is high, vibration is small, the cutting size can be converted at a high speed, and operation and maintenance are easy and convenient.