100 results about "Binary search algorithm" patented technology

An oscillating signal of relatively precise frequency is generated by tuning an oscillator using an external stable oscillating source as a reference. Calibration logic is included to compare a signal from the local oscillator to the reference signal and vary the local signal to a desired frequency. In one embodiment, a binary search algorithm is used to tune the local oscillator. The local oscillating signal can be sent to one or more circuits including at least one sensor of a touch sensitive panel for detecting touch events.

The invention provides a successive approximation register analog-to-digital conversion circuit for realizing minimal dynamic range, comprising a simulation input signal, a successive approximation register integrator and a comparator, wherein the simulation input signal has simulation input voltage Vin, wherein the input signal of the successive approximation register integrator are three reference voltages comprising Vrp, Vrn and Vcm, and the output voltage Vda at an output end of the successive approximation register integrator is driven according to a binary search algorithm; the positiveinput end of the comparator is connected with the simulation input signal and the negative input end of the comparator is connected with the output voltage Vda of the integrator, the output end of the comparator gradually outputs N-bit digital signals. The requirement of the actual application can be effectively satisfied by the SARADC (successive approximation register analog-to-digital conversion) circuit within the minimal dynamic range by regulating the input reference voltage of the successive approximation register integrator; thus, the dynamic range of the SARADC circuit is not wasted;and besides, the cost of the actual circuit is saved.

The invention discloses a successive approximation register type analog-to-digital converter and a conversion method thereof. The successive approximation register type analog-to-digital converter comprises a negative capacitor array, a positive capacitor array, a comparator, a successive approximation register type logic controller and a digital decoding circuit, wherein the negative input end ofthe comparator is connected with the negative capacitor array, the positive input end of the comparator is connected with the positive capacitor array, and the successive approximation register typelogic controller is connected with the output end of the comparator and the digital decoding circuit. Decision errors generated in early steps can be effectively suppressed by using a redundant structure. Compared with a traditional structure based on a binary search algorithm, the most important difference is that the sum of the weights of low-order capacitor banks of the redundant structure is higher than the weights of the adjacent capacitor banks. By redistributing the capacitors in the negative capacitor array and the positive capacitor array and inserting a new capacitor bank, the weightcorresponding to the high-order capacitor bank is less than the sum of the weights of the low-order capacitor banks, and a redundant structure is achieved. The number of the used capacitors can be reduced by adopting a segmented structure for the capacitor array, and the power consumption is reduced.

The embodiment of the invention provides a stability analysis method and device for an airplane structure rectangular flat plate. The method comprises the steps that electronization is carried out on a curve chart of dual-pressure shearing and buckling related curves of the rectangular flat plate, and curve data is obtained, wherein the x-coordinates, the y-coordinates and values on the curves of the curve chart are marked as CurveRx, CurveRy and CurveRs in the curve data respectively; Rx, Ry and Rs are calculated according to the compression allowable stress sigma ccrx of the rectangular flat plate in the X direction, the compression allowable stress sigma ccry of the rectangular flat plate in the Y direction, the shearing allowable stress tau cr, the compression working stress sigma cx in the X direction, the compression working stress sigma cy in the Y direction and the shearing working stress tau; the CurveRx value, the CurveRy value and the CurveRs value meeting formula (I) are sought in the curve data based on a binary search algorithm; the safety margin MS=K-1 of the rectangular flat plate is calculated; the stability of the rectangular flat plate is analyzed according to the safety margin MS. By means of the method and device, the worked out safety margin is high in scientificity and reliability, and therefore the stability analysis result of the airplane structure rectangular flat plate is more reasonable and reliable.

The invention discloses a Lora terminal energy-saving method based on a binary search time slot randomization communication mechanism, which comprises an algorithm adopted by a Lora terminal, an MCU used by a terminal, and a Lora radio frequency module. The algorithm adopted by the Lora terminal Class B includes the following steps: S1: using the binary search algorithm to select and set an appropriate PingNb when a node receives a Beacon; S2: obtaining the offset PingOffset of a start time point of a Ping Slot of each node through time slot randomization; S3: entering the Ping Slot for data reception. The terminal algorithm uses the binary search algorithm to select and set the appropriate PingNb. Each time, the selection range can be reduced by half, and the set PingNb can be quickly andaccurately selected, which greatly shortens the communication time and saves more energy. The time slot randomization is adopted to obtain a cheap amount, it can be ensured that only one node in thePing Slot performs data, and additional energy consumption due to communication system collision or monitoring overload cannot be caused. The Lora terminal energy-saving method can effectively reducepower consumption and achieve energy saving.

A filter tuning system for quickly compensating a time constant using a binary search algorithm is disclosed. The filter tuning system includes a time constant detector, a comparator and a calibration unit. The time constant detector detects a time constant of a filter based on an integral value of a reference input signal using an integrator when the time constant of the filter changes according to a variation of a manufacturing process or a temperature. The integrator includes a capacitor changing according to a variation of the time constant of the filter. The comparator compares the detected time constant with a reference value. The calibration unit compensates the time constant of the filter using the binary search algorithm based on the comparison result until an error between the time constant and the reference value is reduced within an acceptable range.

The invention discloses a method for optimizing heat pump capacity and energy equipment power in an energy hub. The method comprises the following steps: establishing an energy hub model containing anatural gas boiler, an electric boiler, a cooler and a heat pump; establishing a double-layer optimized upper-layer model, and solving the optimal heat pump capacity; establishing a double-layer optimized lower-layer model, and solving the optimal power of each energy device; solving the upper-layer model by utilizing a binary search algorithm based on a quadratic function; and solving a lower-layer model by using a multi-objective evolutionary algorithm NSGAII. By adopting the optimization method provided by the invention, the problem of a multi-target double-layer model can be solved withoutthe help of commercial optimization software. And a reasonable, efficient and green planning scheme is obtained, so that the total operating cost and the total exhaust emission of the energy hub arerelatively optimal.

The present invention relates to a method for deblurring a barcode image. The method includes the steps of: acquiring the terminal's n OTFs calculated by varying focal lengths for a subject; if a barcode image is inputted through the mobile terminal, fixing a specific value among NSRs as a value to be applied to an error metric of Wiener filtering, applying n PSFs calculated from the n OTFs to the error metric by a binary search algorithm and determining whether the result of the application to the error metric is not exceeding the pre-set threshold or not; and selecting a PSF value and an NSR value as values of Wiener filtering if the result of the application to the error metric is not exceeding the pre-set threshold and then performing the Wiener filtering to the inputted barcode image by using the selected PSF value and the selected NSR value.