71results about How to "Accurate signal transmission" patented technology

A semiconductor die with an integrated electronic circuit, configured so as to be mounted in a housing with a capacitive transducer e.g. a microphone. A first circuit is configured to receive an input signal from the transducer at an input node and to provide an output signal at a pad of the semiconductor die. The integrated electronic circuit comprises an active switch device with a control input, coupled to a pad of the semiconductor die, to operatively engage or disengage a second circuit interconnected with the first circuit so as to operate the integrated electronic circuit in a mode selected by the control input. That is, a programmable or controllable transducer. The second circuit is interconnected with the first circuit so as to be separate from the input node. Thereby less noise is induced, a more precise control of the circuit is obtainable and more advanced control options are possible.

Abstract of the Disclosure A system and method for multiplexing an in-service optical time domain reflectometry (ISOTDR) session using the same wavelength as the data traffic for point-to-point or point-to-multipoint optical fiber networks while not impacting data transmission is disclosed.

A crawler track tension adjusting device is provided in which a driving unit of a closed structure is used as a control operation mechanism and automatic tension adjustment is carried out in response to a control signal to create optimum tension on a crawler belt. To this end, the crawler track tension adjusting device comprises: (a) a tension adjusting cylinder which is operated in a direction to increase tension and in a direction to reduce tension under the same condition; (b) a hydraulic pump driven by a motor; (c) a hydraulic circuit including an electromagnetic direction selector valve disposed in an oil pipeline for connecting the hydraulic pump to the tension adjusting cylinder; and (d) a hydraulic sensor for detecting the operating condition of the tension adjusting cylinder disposed in the hydraulic circuit. The hydraulic sensor is connected to an additionally installed controller to operate the hydraulic pump and the direction selector valve thereby controlling the tension adjusting cylinder.

A method of exchanging messages for switching of a sink device of a wireless network to a source device comprises receiving audio/video (A/V) data from a first source device; transmitting a first command to a second source device within the wireless network to identify whether the second source device can transmit A/V data; receiving a second command from the first source device, the second command being transmitted from the second source device in response to the first command and including indication information indicating whether the second source device can transmit A/V data; and determining whether to switch to the second source device depending on the indication information included in the second command.

An OFDM communication system is provided that can implement more accurate signal transmission. The guard interval in the symbol section is formed by copying a predetermined number of symbols at the end portion of the symbol section and adding them to the forefront portion of the symbol portion. In the subsidiary station, the clipping start position stored in its memory is referred. Then, a predetermined number of symbols are clipped from the clipping start position. The clipped signal includes the guard interval of the symbols. However, since the guard interval is the signal obtained by copying the rear portion of the symbol, the clipping signal is the signal in which the phase of the symbol is merely deviated. An accurate symbol is obtained by performing phase correction. Thus, the influence due to multipath is suppressed while the signal transmitted from the base station can be accurately decoded.

Provided is a circuit board based connector with raised projection section, which is formed by applying substrate bonding and formation techniques to make a connector that features a raised projection section. The circuit substrate has an end that is provided with conductive terminals and an opposite end that is provided with flat cable connection terminals for connection with a flat cable. The circuit substrate has a first surface on which the projection section is formed. A shielding layer covers the projection section and a portion of the first surface. The circuit substrate has a second surface on which a second shielding layer is selectively formed. When the circuit substrate is inserted into an insertion space defined in a connection socket with the conductive terminals thereof, the shielding layer and the projection section of the circuit substrate are put into engagement with and thus retained by the insertion space of the connection socket to thereby fix within the connection socket.

The invention discloses a gear shifting control system. The gear shifting control system comprises a gear shifting controller, a gear shifting handle, a gear shifting actuating mechanism and a transmission controller, wherein a photoelectric tube array device is arranged at the lower end of the gear shifting handle and acquires handle operation information of a user; the gear shifting actuating mechanism receives control signals transmitted from the gear shifting controller and drives a motor to rotate so that make and break of an inner oil line of a transmission are controlled; the gear shifting actuating mechanism also drives a transmission gear sensor to rotate; the transmission controller acquires current position information fed back by the transmission gear sensor in time, and transmits the current position information to the gear shifting controller and a combination instrument in a CAN (controller area network) bus message mode; and after receiving gear feedback information, the transmission controller drives an electromagnetic valve in the transmission to control a gear to perform gear shifting. Operation of the user is converted into electric signals capable of expressing operation intention of the user, the electric signals are forwarded to a transmission control unit (TCU), and the transmission control unit directly drives the transmission to carry out gear shifting.

The invention discloses an electric heating pot. The electric heating pot comprises a pot body and a pot cover which is separably arranged on the pot body, wherein a liner, a heating device and a heating terminal electrically connected with the heating device are arranged in the pot body, and the pot cover is provided with a first temperature measurement device and a first wireless transmitting terminal electrically connected with the first temperature measurement device. The electric heating pot further comprises a control box separated from the pot body and an insertion piece inserted in the upper end of the pot body, wherein a power panel is arranged in the control box, a power terminal and a first wireless receiving terminal which are electrically connected with the power panel are arranged on the insertion piece, the power terminal is electrically connected with the heating terminal in an inserted mode, the first wireless receiving terminal corresponds to the first wireless transmitting terminal, the first wireless receiving terminal receives a temperature signal transmitted by the first wireless transmitting terminal and sends the temperature signal to the power panel, and the distance between the first wireless receiving terminal and the first wireless transmitting terminal is smaller than 50 mm.

A light-weight long-distance underwater LED wireless optical communication transmission system comprises a transmitting terminal used for transmitting optical signals. The transmitting terminal comprises a data acquisition module; a transmitting end electro-optical conversion module; a transmitting end transmission optical fiber; A transmitting terminal with the watertight mechanical structure which comprises a transmitting terminal photoelectric conversion module, a transmitting end digital signal processing module, a digital-to-analog conversion module, an amplifier, an LED array, a DC biasmodule, a transmitting end lens assembly. A receiving end is used for receiving the optical signal transmitted by the transmitting end, comprises: a receiving end with a watertight mechanical structure, which is arranged underwater, and comprises a receiving end lens assembly, a detector, a transimpedance amplifier, a balancing and filtering module, an analog-to-digital conversion module, a receiving end digital signal processing module, a receiving end electro-optical conversion module, a receiving end transmits the optical fiber, a receiving end photoelectric conversion module, and a data recovery module. The optical fiber is light in weight, the system is suitable for long-distance transmission, cannot be interfered by electromagnetic interference, and is accurate in signal transmission.

The invention provides an antenna and an unmanned aerial vehicle. The antenna can be installed outside a vehicle body of the unmanned aerial vehicle, and the antenna comprises a substrate, a coaxial line, a first radiating unit and a first antenna unit; the substrate is provided with a first face and a second face which are back to each other; the first radiating unit comprises a first radiating part arranged on the first face and a second radiating part which is arranged on the second face and electrically connected with the first radiating part, and the current path lengths of the first radiating part and the second radiating part are equal; the first antenna ground unit comprises a first antenna ground part arranged on the first face and a second antenna ground part which is arranged onthe second face and electrically connected with the first antenna ground part, and the current path lengths of the first antenna ground part and the second antenna ground part are equal; the first radiating unit and the first antenna ground unit feed through the coaxial line, therefore, it is guaranteed that electromagnetic waves on the two sides of the antenna substrate can perform harmonic vibration at the same resonant frequency, and the radiant efficiency of the antenna is improved.

The invention provides a detection circuit suitable for the on-line temperature of a high-voltage solid-state soft starter, belonging to the technical field of the starting of a high-voltage motor, and mainly aiming at solving the problem that the existing temperature protection technology only sets the every-time starting time interval to realize the temperature protection of a thyristor and can not meet the field demand. The circuit is mainly characterized by comprising a high voltage-side detection circuit which is formed by the means that a temperature signal acquisition circuit, a voltage amplifier circuit, a voltage/frequency switching circuit and an optic fiber transmitting circuit are sequentially connected with one another, and a low voltage-side switching circuit which is formed by the means that an optic fiber receiving circuit and a frequency/voltage switching circuit are sequentially connected with each other; and the optic fiber transmitting circuit in the high voltage-side detection circuit is connected with the optic fiber receiving circuit of the low voltage-side switching circuit by an optic fiber. The detection circuit is higher in cost performance, a V/F (voltage/frequency) optic fiber transmission system of the detection circuit has the characteristics of being long in distance, anti-jamming, high in linear precision, good in performance and the like, and the detection circuit is mainly used for the on-line temperature of the thyristor in high-voltage starter starting equipment.

A high-temperature anti-explosion signal cable for new energy automobiles comprises a center conductor and a special high-temperature-resistant silicon rubber ceramic insulating layer. The center conductor is an annealed bare copper or tinned stranded conductor formed by standard cross stranding and is peripherally and closely coated with the special high-temperature-resistant silicon rubber ceramic insulating layer. The high-temperature anti-explosion signal cable has the advantages that performance requirements on high temperature resistance, super softness and the like can be met; after direct flame impact on the cable, the cable surface is turned into a ceramic shell with excellent flame-retardant, fireproof, fire insulation and fire prevention functions, and accordingly line smoothness is effectively protected, signal transmission is unaffected, signals can be transmitted quickly and accurately to enable people in automobiles to response timely, and personal safety is guaranteed.

The invention provides a fastener tape supply unit applied to a continuous manufacturing apparatus for a fastener stringer, wherein a dancer roller moving up and down corresponding to changes in tape tension is loaded on a fastener tape carried between a feed roller portion for feeding the fastener tape continuously and positively and an engaging element implantation portion, upper and lower limit positions of the dancer roller are detected by detecting means, and when the dancer roller goes out of a range defined by the upper limit position and the lower limit position, a corresponding detection signal is sent to a control portion, the control portion outputs an instruction signal for always holding the dancer roller between the upper and lower limit positions to a drive portion of a drive roller, thereby controlling a tape feeding amount of the feed roller portion to be always constant.

The invention relates to a transmission device capable of simultaneously achieving the purposes of remotely transmitting a grounding switch switch-on or switch-off signal and locally clearing a switch-on or switch-off state, and aims to provide a signal conversion transmission device which is high in space utilization rate, accurate in signal transmission, convenient for in-situ observation and easy to expand the capacity. The technical scheme is characterized in that (1) auxiliary switches, rocker arms, a connecting plate, an indication board and an observation window form a two-stage transmission mechanism, spindles of the two auxiliary switches are simultaneously driven to rotate under the rotation driving of a grounding switch connecting rod, and thus synchronous switched transmissionof signals of the two auxiliary switches is realized; (2) the indication board is connected with the transmission mechanism and moves up and down in a reciprocating manner along with the transmissionmechanism, and the synchronization between local indication and remote signal transmission is realized; (3) the observation window is set, information of an alignment area of the indication board andthe observation window is read, and the accessibility of a local switch-on or switch-off signal is realized; and (4) the transmission mechanism and the auxiliary switches are additionally arranged atcorresponding positions so as to realize capacity expansion of the auxiliary switches, and different use requirements are met.

The invention discloses a filter circuit efficient in filtering. The filter circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, an operation amplifier A, an alternating-current power supply Vi and a direct-current power supply V0. The non-inverting input ends of the alternating-current power supply Vi, the resistor R1, the resistor R2, the resistor R3 and the operation amplifier A are sequentially serially connected. One end of the capacitor C1 is connected to the common terminal of the resistor R2 and the resistor R3, and the other end thereof is connected with the output end of the operation amplifier A. One end of the capacitor C2 is connected with the common terminal of the resistor R3 and the operation amplifier A, and the other end thereof is connected with the capacitor C3. The capacitor C3 is further connected with the common terminal of the resistor R1 and the resistor R2. One end of the resistor R5 is connected with the common terminal of the alternating-current power supply Vi and the resistor R1. The resistor R5, the capacitor C2 and the capacitor C3 are all grounded. The resistor 4 is connected between an inverting input end of the operation amplifier A and the output end of the operation amplifier A. The output end of the operation amplifier A is further connected with the direct-current power supply V0. By the arrangement, twice filtering can be achieved, signal transmission is accurate, resonance phenomena can be avoided, and microwave communication quality can be increased.

The control circuit of an electric motor, which has at least one phase supplied with high voltage and has a defined high-voltage zone, is provided with a control for the supply current of the phase with a setpoint-value current, and has devices for measuring the supply current which generate a first analog signal whose value corresponds to the measured current, an electronic control unit being disposed in a low-voltage zone, and having an analog-to-digital converter for converting the first analog signal or another analog signal acting as the first analog signal, into a corresponding digital signal which is supplied to the electronic control unit. The measuring devices are formed by a bleeder resistor, which is disposed in series with the phase, as well as by a differential amplifier whose two inputs, respectively, are connected to two contacts of the bleeder resistor. The analog-to-digital converter is located in the high-voltage zone a galvanic separating element is situated between the analog-to-digital converter and the electronic control unit. The control circuit has, inter alia, a voltage converter which, within the high-voltage zone, provides a floating low voltage which supplies the analog-to-digital converter.

The invention discloses a production process of a control annunciator of a high-strength and abrasion-resistant automobile antiblock brake system (ABS). The production process comprises the steps of magnetic ring raw material constituents and content, sieving, weighting, one-time hybrid stirring, drying, one-time extrusion, one-time smashing, secondary hybrid stirring, secondary extrusion, secondary smashing, forming, demagnetizing and magnetizing. The control annunciator of the automobile ABS, produced according to the method, has the advantages of high strength, abrasion resistance, stable magnetic intensity sensing capability, high signal induction and long service lifetime.