33results about How to "Increase the maximum distance" patented technology

The terminal device of the present invention comprises a transmitting means for transmitting, to a contact-less IC medium, commands and carrier signals used for receiving responses, a receiving means for receiving responses from the contact-less IC medium, and a controlling means for controlling at least one of the transmitting means and the receiving means so as to adjust a maximum distance at which the terminal device can communicate with the contact-less IC medium. The terminal device firstly transmits an inquiry request command from the transmitting means to the contact-less IC medium, and receives an inquiry request response to the transmitted inquiry request command at the receiving means from the contact-less IC medium. Then, the terminal device transmits a data processing command from the transmitting means to the contact-less IC medium, and receives a data processing response to the transmitted data processing command at the receiving means from the contact-less IC medium. The maximum distance at which the terminal device can receive the data processing response is greater than the maximum distance at which the terminal device can receive the inquiry request response.

A radio-frequency identification tag communication device including a BFA weight-value setting portion operable to control a directivity of a transmitter antenna, and an adaptive processing portion operable to implement an adaptive control of a weight to be given to a received signal received by each of a plurality of antenna elements, on the basis of a reply signal transmitted from a radio-frequency identification tag, so that the directivity of the transmitter antenna is changed to a direction in which the frequency identification tag in question is expected to exist, and the weight to be given to each received signal is subjected to the adaptive control, whereby the sensitivity of communication of the communication device with the radio-frequency identification tag is improved.

A signal generation system suitable for use in a radar system comprises a local oscillator (LO) and an intermediate frequency IF oscillator, wherein the IF oscillator is a Direct Digital Synthesiser, and the LO is a free runn ing oscillator not itself locked to another oscillator but which acts as a c lock reference for the DDS and is the highest frequency oscillator in the sy stem. The LO may also act as a reference for a receive chain digitiser. The invention exploits phase noise advantages of a free running oscillator at so me distance from the carrier whilst maintaining coherency with other system components. The system typically finds application in FMCW radars.

Provided is a depth image unfolding apparatus and method that may remove a depth fold from a depth image to restore a three-dimensional (3D) image. The depth image unfolding apparatus may include an input unit to receive inputted multiple depth images with respect to the same scene, the multiple depth images being photographed based on different modulation frequencies of a fixed photographing device, a depth fold estimator to estimate a number of depth folds based on a distance between multiple three-dimensional (3D) points of multiple pixels indicating the same location of the scene in the multiple depth images, and an output unit to output the multiple depth images from which depth folds are removed based on the estimated number of depth folds.

The invention discloses an ultra wideband stratum communication system which is mainly used for solving the problem that no reliable communication means can be taken when a serious accident occurs in a mine well. The ultra wideband stratum communication system comprises two transceivers, a pair of transmitting and receiving common electrodes and a transmitting and receiving changeover switch, a wireless channel is formed through the electrodes by using a stratum as a transmission medium so as to further form a time division duplex communication system. Each transceiver comprises transmitting equipment and receiving equipment, wherein the transmitting equipment comprise a channel coding unit, an M-element spectrum spreading unit and an E-class power amplifier; the receiving equipment comprise a low noise amplifier, a level-isolating straight-coupling capacitor, an AGC (Automatic Gain Control) amplifier, an A/D (Analog to Digital) converter and a dispreading, demodulating and channel decoding unit. A ternary pseudo random code with chip value of -1 or 0 or 1 is taken as an M-element spectrum spreading code, and a push-pull power amplifier with an output transformer is used as the E-class power amplifier. The invention has the advantages of small signal duty ratio, high peak-to-average power ratio, good error code characteristics and long transmission distance, and can provide a reliable communication means for mine well disaster relief.

The invention discloses a rotation detection device. The device comprises a tray which rotates around an axis, and a rotation detection module which is located above the tray and is fixed. An upper surface of the tray is in a partial metallization state; the rotation detection module comprises an excitation circuit, a PCB coil and a signal processing circuit which are connected in sequence; the PCB coil comprises an exciting coil which is parallel to an upper plane of the tray and whose a circle center is positioned on the axis, and a plurality of induction coils which are circumferentially arranged in the exciting coil at equal angles; opposite angles of the plurality of induction coils are matched in pairs; and the signal processing circuit comprises a switch amplifying circuit and a sampling circuit connected to a sampling end of the switch amplifying circuit, and one end of each induction coil is connected to an input end of the switch amplifying circuit. The switch amplifying circuit can amplify induction signals of the induction coil, and the maximum distance between the upper plane of the tray and the PCB coil plane is increased.

A method for providing hearing assistance to a user by capturing input audio signals; estimating a speech level of the input audio signals and an ambient noise level of the input audio signals; applying a gain model to the input audio signals to transform the input audio signals into filtered audio signals, wherein, for a each ambient noise level, the gain varies as a function of the speech level and wherein the function varies according to the ambient noise level changing the ratio of the gain at low speech levels and at high speech levels as a function of the ambient noise level; wirelessly transmitting the filtered audio signals to a receiver unit forming or being connected to a user hearing stimulator, the stimulator being worn at or in the user's ear; and stimulating the user's hearing by the stimulator according to audio signals supplied by the receiver unit.

The invention provides a method for controlling stepped motor in a track jumping operation for short track width in an optical storage system, wherein the optical storage system also includes an optical reading head and an object lens group, the method comprises calculating the number of steps wherein the step motor rotation is one, moving the object lens group to a target trajectory, using the step motor to move the optical reading head to a destination location.

Bolt-type coupling system for pipes, in which by means of the new geometry of the support element, improvement is achieved in the mechanical features of the connection. The improvement is evaluated by means of increasing the admissible work pressures and traction stress while keeping constant the thickness of the pipe wall. Using the support element can be carried out by applying a weld bead and subsequent machining, making use of a backup ring for the placement of the weld bead and finally, made jointly in the casting process.

The invention discloses a humidity detection and wireless short range alarm method. The method includes a detection step, a data processing step, a wireless connection step, a wireless connection control step, a wireless transmission step and a data display and alarm step. According to the invention, a wrist band and/or cell phone is in wireless connection with a 2.4G wireless module and/or BLE Bluetooth module of at least one humidity detector. Monitoring is performed through the wrist band and the cell phone at the same time. Besides, the wrist band and/or the cell phone can be connected to a plurality of humidity detectors at the same time wirelessly. Wireless signal connection is more stable and use convenience is improved. Especially in night use, only a specific person can be woken up and other people are not disturbed; sleep of other families is not affected.

A video surveillance system includes a first combiner, and a monitor, a power source and a camera control unit, each of which is electrically coupled to the first combiner. A regulated combiner located remotely from the first combiner and being electrically connected to the first combiner with at least one twisted pair of wires includes a voltage regulator which provides a regulated voltage to the camera located remotely from the first combiner. The camera is operable at a predetermined voltage level. The power supply provides an increased voltage to the regulated combiner through the first combiner and the twisted pair of wires to compensate for IR losses in the twisted pair of wires. Thus, the regulated combiner reduces the increased voltage to a safe level for the CCTV camera and other devices on a network to operate properly. The system dramatically increases the distance that a power supply can be located from where the camera is located, which decreases installation costs for CCTV surveillance systems.

The invention relates to a combined touch pad module, a touch signal integration method and a notebook computer. The combined touch pad module is used for a notebook computer and comprises a shell, a fixed touch pad module, a sliding touch pad module and a touch signal processing module, wherein the shell is provided with an opening; the fixed touch pad module comprises a fixed touch pad and a first signal generating module and is fixed on the shell, and when the fixed touch pad is touched, the first signal generating module generates a first touch signal; the sliding touch pad module comprises a sliding touch pad and a second signal generating module; in the case of withdrawing, the sliding touch pad is contained in the shell; in the case of use, the sliding touch pad is moved outside the shell through the opening and is connected with the fixed touch pad in a sliding mode, and when the sliding touch pad is touched in a use state, the second signal generating module generates a second touch signal; and the touch signal processing module is used for processing the first touch signal and the second touch signal to form an integration signal so as to control the notebook computer. The invention extends the operation range of the touch pads.