8 results about "Digital converter" patented technology

A rotational sensing system is adaptable to sensing motor rotation based on eddy current sensing. An axial target surface is incorporated with the motor rotor, and includes one or more conductive target segment(s). An inductive sensor is mounted adjacent the axial target surface, and includes one or more inductive sense coil(s), such that rotor rotation rotates the target segment(s) laterally under the sense coil(s). An inductance-to-digital converter (IDC) drives sensor excitation current to project a magnetic sensing field toward the rotating axial target surface. Sensor response is characterized by successive sensor phase cycles that cycle between L_MIN in which a sense coil is aligned with a target segment, and L_MAX in which the sense coil is misaligned. The number of sensor phase cycles in a rotor rotation cycle corresponds to the number of target segments. The IDC converts sensor response measurements from successive sensor phase cycles into rotational data.

The present invention discloses provides a method for fabricating an electromagnetic induction digitizer antenna board. The present invention is featured with advantages of low cost, satisfactory consistency of the product quality, high production yield, simplified process, and using well-developed equipment. The method includes the steps of: a. preparing a substrate that is convenient for being holed; b. providing a consecutive wire leading-out terminal at one side of the substrate; c. moving the substrate relative to the consecutive wire leading-out terminal along with a predetermined track of the electromagnetic induction coil of the induction digitizer antenna board, so that the consecutive wire leading-out terminal gets in surface-contact with the substrate, and configures the electromagnetic induction coil on the substrate; d. binding the conductive wire of the electromagnetic induction coil with the substrate at every predetermined interval.

The invention discloses a thermocouple temperature measurement device and a temperature detection method. The device comprises a thermocouple, a conditioning module used for carrying out common-mode filtering processing of an analog hot end thermoelectric potential signal outputted by a hot end of the thermocouple, an analog-to-digital converter used for converting the analog hot end thermoelectric potential signal subjected to filtering processing into a digital hot end thermoelectric potential signal, a thermistor used for sensing the cold end temperature of the thermocouple, and a controller used for obtaining a cold-end thermoelectric potential according to the cold-end temperature of the thermocouple, obtaining a hot-end thermoelectric potential according to the digital hot-end thermoelectric potential signal, calculating a target thermoelectric potential according to the hot-end thermoelectric potential and the cold-end thermoelectric potential, and obtaining the hot-end temperature of the thermocouple according to the target thermoelectric potential. The device is advantaged in that the device can improve the anti-interference capability, guarantees high precision of temperature detection, achieves hot-end thermoelectric potential correction according to the hot-end thermoelectric potential and the cold-end thermoelectric potential of the thermocouple through employing an inverse temperature measurement algorithm, obtains the hot-end temperature of the thermocouple, is good in flexibility, and is wide in application range.

The invention discloses an analog-to-digital converter calibration system and a method. The analog-to-digital converter calibration system comprises a standard reference unit and a data acquisition and processing unit. Wherein the output end of the standard reference unit is connected with the input end of the analog-to-digital converter, and the standard reference unit is used for generating standard voltage. And the data acquisition and processing unit is respectively connected with the output end of the analog-to-digital converter and a standard reference source and is used for acquiring and processing data and controlling the standard reference unit to work. According to the analog-to-digital converter calibration system, the data acquisition and processing unit controls the standard reference unit to output a plurality of stepped decreasing voltage values to the analog-to-digital converter. The data acquisition and processing unit acquires the output value of the analog-to-digitalconverter at the same time and compares the output value with the reference value stored in the data acquisition and processing unit, so that comprehensive calibration of the analog-to-digital converter can be realized, and troubleshooting of problems is facilitated.

A communication method provided by the invention is a point-to-point communication method having a low data transfer rate, and transmits information, commands and configurations of electronic equipment provided with a light receiver by modulating light emitted by a flashlight of a handheld device having processing capabilities. The launch operation is handled by an application installed in a handheld device, such as a smartphone, tablet, or the like. The receiving operation is processed by the electronic equipment to be configured. The transmitting equipment exists in a handheld device, and the handheld device is provided with an application program and a flash lamp. The receiving device is installed in an electronic device to be configured. And the electronic equipment consists of a powersupply (A), a luminosity sensor (B) for monitoring the change of luminosity emitted by the flashlight (F) of the handheld device regardless of the environment, an analog-to-digital converter (C) forconverting an analog signal from the luminosity sensor into a digital signal, a microcontroller (D) for receiving firmware and processing the digital signal, and an electronic equipment or load control device (E) to be adjusted.

The invention discloses a high-reliability physical random number generation system and method. The system comprises a digital driving module, a chaotic noise acquisition module, a post-processing module, an online detection module and an output module, the digital driving module generates a digital driving signal and sends the digital driving signal to the chaotic noise acquisition module; the chaotic noise acquisition module comprises a digital-to-analog converter, a plurality of superlattice devices and a plurality of analog-to-digital converters; the digital-to-analog converters receive the digital driving signals, convert the digital driving signals into analog waveforms, and drive the superlattice devices to generate chaotic oscillation by using the analog waveforms; each analog-to-digital converter samples chaotic oscillation generated by the corresponding superlattice device and outputs an original random sequence; the post-processing module receives the original random sequence and performs randomness extraction to obtain a plurality of groups of physical random numbers with sufficient entropies; and the online detection module performs bitwise exclusive OR on each group of physical random numbers, sends the physical random numbers to the output module, and sends the physical random numbers to the digital driving module to generate digital driving signals. According tothe invention, high-speed generation of physical random numbers can be realized.