Abstract: An open cell detection method includes: (a) generating a control signal by a control unit, to turn on a first balance switch for a first time period; (b) generating the control signal with the control unit, to turn off the first balance switch for a second time period; (c) measuring a voltage value on a first capacitor, with a measure unit; (d) if the voltage value on the first capacitor is less than an open cell threshold, then determining with the control unit that the first cell has an open cell failure; (e) for each cell of the cells, repeating steps (a)-(d); and (f) if at least one cell of the cells has an open cell failure, then determining with the control unit that the battery management system has an open cell failure.

Abstract: The present application discloses a rear cover of a vehicle lamp having a valve structure and infrared radiation drying and air discharging function, which includes an end cover provided with a plurality of air vents, a connecting base for connecting with a vehicle lamp housing, and a membrane module for infrared radiation drying and air discharging. The end cover and the connecting base are assembled and connected to form the rear cover of the vehicle lamp. The membrane module is built in a cavity of the rear cover of the vehicle lamp. At least one valve is provided on a path of air circulation inside and outside the vehicle lamp housing through the rear cover of the vehicle lamp, and the at least one valve automatically opens and closes under impulse of air pressure difference.

Abstract: The present application discloses a rear cover of a vehicle lamp having a valve structure and infrared radiation drying and air discharging function, which includes an end cover provided with a plurality of air vents, a connecting base for connecting with a vehicle lamp housing, and a membrane module for infrared radiation drying and air discharging. The end cover and the connecting base are assembled and connected to form the rear cover of the vehicle lamp. The membrane module is built in a cavity of the rear cover of the vehicle lamp. At least one valve is provided on a path of air circulation inside and outside the vehicle lamp housing through the rear cover of the vehicle lamp, and the at least one valve automatically opens and closes under impulse of air pressure difference.

Abstract: A data access method and device for parallel FFT computation. In the method, FFT data and twiddle factors are stored in multi-granularity parallel memories, and divided into groups throughout the computation flow according to a uniform butterfly representation. Each group of data involves multiple butterflies that support parallel computation. Meanwhile, according to the butterfly representation, it is convenient to generate data address and twiddle factor coefficient address for each group. With different R/W granularities, it is possible to read/write data and corresponding twiddle factors in parallel from the multi-granularity memories. The method and device further provide data access devices for parallel FFT computation. In the method and device, no conflict will occur during read/write operations of memories, and no extract step is required for sorting the read/written data. Further, the method and device can flexibly define the parallel granularity according to particular applications.

Abstract: A multi-granularity parallel storage system including a plurality of memories, a shift generator, an address increment lookup unit, an address shifter, a row address generator, and a plurality of address adders. The shift generator is configured to generate a shift value. The address increment lookup unit is configured to generate input data for the address shifter. The address shifter is configured to cyclically shift the input data rightward by Shift elements and then output the shifted data. The row address generator is configured to generate a row address RowAddr and input the generated row address RowAddr to the other input terminal of each address adder. Each address adder is configured to perform a non-sign addition of the input data at the two input terminals to obtain a read/write (R/W) address for one of the memories and input the R/W address to an address input terminal of the memory.

Abstract: A multi-granularity parallel storage system includes an R/W port and a memory. The memory includes W memory blocks and a data gating network. Each of the memory blocks is a 2D array consisting of multiple memory units, and each memory row of the 2D array includes W memory units. For each memory block, one memory row can be read/written at a time, W is the nth power of 2, and n is a natural number.

Abstract: A multi-granularity parallel storage system including a plurality of memories, a shift generator, an address increment lookup unit, an address shifter, a row address generator, and a plurality of address adders. The shift generator is configured to generate a shift value. The address increment lookup unit is configured to generate input data for the address shifter. The address shifter is configured to cyclically shift the input data rightward by Shift elements and then output the shifted data. The row address generator is configured to generate a row address RowAddr and input the generated row address RowAddr to the other input terminal of each address adder. Each address adder is configured to perform a non-sign addition of the input data at the two input terminals to obtain a read/write (R/W) address for one of the memories and input the R/W address to an address input terminal of the memory.

Abstract: The present disclosure provides A data access method and device for parallel FFT computation. In the method, FFT data and twiddle factors are stored in multi-granularity parallel memories, and divided into groups throughout the computation flow according to a uniform butterfly representation. Each group of data involves multiple butterflies that support parallel computation. Meanwhile, according to the butterfly representation, it is convenient to generate data address and twiddle factor coefficient address for each group. With different R/W granularities, it is possible to read/write data and corresponding twiddle factors in parallel from the multi-granularity memories. The method and device further provide data access devices for parallel FFT computation. In the method and device, no conflict will occur during read/write operations of memories, and no extract step is required for sorting the read/written data.

Abstract: A multi-granularity parallel storage system and memory that support parallel read/write of rows and columns in multiple granularities. The storage system includes a R/W port and a memory. The memory includes W memory blocks and a data gating network. Each of the memory blocks is a 2D array consisting of multiple memory units and each memory row of the 2D array includes W memory units. For each memory block, one memory row can be read/written at a time, W is the nth power of 2, and n is a natural number. The storage system can support parallel read/write of matrix row and column data of different data types at the same time, and thus essentially eliminate the need for a transposition operation in signal processing and improve efficiency of signal processing.

Abstract: A cantilever beam structural resonant-type integrated optical waveguide accelerometer, includes an input waveguide (1), a dissymmetrical structural Mach-Zehnder interferometer (2), a micro-mechanical vibration cantilever beam (3), a short curved waveguide (4) and an output waveguide (5); all the waveguide structures and the cantilever beam use the integrated optical micromachining technique, and the device single-scale integration can be realized by using the temperature-insensitive organic polymer optical waveguide structure and the organic polymer substrate, the key technique indexes such as detection sensitivity, dynamic range are extensively adjusted. The phase difference of the optical signal can be measured by detecting the optical intensity of the resonant frequency of the optical circuit so as to achieve high sensitive acceleration detection, and to be free from the effect of the ambient temperature disturbance and waveguide birefringence.

Abstract: A biaxial optical gyroscope is provided, which realizes mode separation using the waveguide devices with different material, and the biaxial optical gyroscope includes: a surface Plasmon Polariton Y-type mode splitter (1), a Y waveguide integrated optical device (2), a Y waveguide integrated optical chip (3), a first polarization-maintaining fiber coil (41), a second polarization-maintaining fiber coil (42), directional couplers (51, 52) and detectors (61, 62), wherein the two output ends of the surface Plasmon Polariton Y-type mode splitter (1) are respectively connected to the Y waveguide integrated optical device (2) and the Y waveguide integrated optical chip (3), and the output ends of the Y waveguide integrated optical device (2) and the Y waveguide integrated optical chip (3) are respectively connected to the first polarization-maintaining fiber coil (41) and the second polarization-maintaining fiber coil (42).

Abstract: An integrated optical fiber gyroscope chip based on surface Plasmon Polariton waveguide is an integrated optical fiber gyroscope chip in which optical signal is transmitted through the surface Plasmon Polariton waveguide and the polymer optical waveguide which are connected with each other, and it is used in the optical fiber gyroscope field. From the input end to the output end, the optical fiber gyroscope chip sequentially has: an input waveguide (1) and the third output waveguide (7), a directional coupler (2), a symmetrical triple waveguide splitter (3), the first output waveguide (61) and the second output waveguide (62), wherein the input waveguide (1), the first output waveguide (61), the second output waveguide (62) and the third output waveguide (7) are polymer optical waveguides, but the directional coupler (2) and the symmetrical triple waveguide splitter (3) are made from the surface Plasmon Polariton waveguide.

Abstract: A biaxial optical gyroscope is provided, which realizes mode separation using the waveguide devices with different material, and the biaxial optical gyroscope includes: a surface Plasmon Polariton Y-type mode splitter (1), a Y waveguide integrated optical device (2), a Y waveguide integrated optical chip (3), a first polarization-maintaining fiber coil (41), a second polarization-maintaining fiber coil (42), directional couplers (51, 52) and detectors (61, 62), wherein the two output ends of the surface Plasmon Polariton Y-type mode splitter (1) are respectively connected to the Y waveguide integrated optical device (2) and the Y waveguide integrated optical chip (3), and the output ends of the Y waveguide integrated optical device (2) and the Y waveguide integrated optical chip (3) are respectively connected to the first polarization-maintaining fiber coil (41) and the second polarization-maintaining fiber coil (42).

Abstract: An integrated optical fiber gyroscope chip based on surface Plasmon Polariton waveguide is an integrated optical fiber gyroscope chip in which optical signal is transmitted through the surface Plasmon Polariton waveguide and the polymer optical waveguide which are connected with each other, and it is used in the optical fiber gyroscope field. From the input end to the output end, the optical fiber gyroscope chip sequentially has: an input waveguide (1) and the third output waveguide (7), a directional coupler (2), a symmetrical triple waveguide splitter (3), the first output waveguide (61) and the second output waveguide (62), wherein the input waveguide (1), the first output waveguide (61), the second output waveguide (62) and the third output waveguide (7) are polymer optical waveguides, but the directional coupler (2) and the symmetrical triple waveguide splitter (3) are made from the surface Plasmon Polariton waveguide.

Abstract: A cantilever beam structural resonant-type integrated optical waveguide accelerometer, includes an input waveguide (1), a dissymmetrical structural Mach-Zehnder interferometer (2), a micro-mechanical vibration cantilever beam (3), a short curved waveguide (4) and an output waveguide (5); all the waveguide structures and the cantilever beam use the integrated optical micromachining technique, and the device single-scale integration can be realized by using the temperature-insensitive organic polymer optical waveguide structure and the organic polymer substrate, the key technique indexes such as detection sensitivity, dynamic range are extensively adjusted. The phase difference of the optical signal can be measured by detecting the optical intensity of the resonant frequency of the optical circuit so as to achieve high sensitive acceleration detection, and to be free from the effect of the ambient temperature disturbance and waveguide birefringence.