Abstract: A base station determination method includes: acquiring differential positioning information of at least one base station; according to a received satellite positioning signal and at least one group of differential positioning information, respectively calculating a calculation position of a roadside device corresponding to the at least one group of differential positioning information; and determining a target base station from the at least one base station according to the calculation position of the roadside device and the actual position of the roadside device. The target base station is a base station that corresponds to differential positioning information corresponding to a calculation position, the distance between which and the actual position is the least.

Abstract: An image compensation device and a prism carrying mechanism thereof. The prism carrying mechanism comprises a base and a pair of prism carrying members. The base comprises a base body, a light passing hole disposed at the base body, and a plurality of first sliding assembling parts integrally formed on the same side of the base body. Each of the prism carrying members comprises a carrying member body, a prism assembling part disposed at the carrying member body and corresponding to the light passing hole, and a plurality of second sliding assembling parts integrally formed on the same side of the carrying member body. The prism assembling parts of the pair of prism carrying members are oppositely and alternately disposed in an axial direction. The plurality of second sliding assembling parts are slidably assembled to the plurality of first sliding assembling parts respectively.

Abstract: An image compensation device and a prism carrying mechanism thereof. The prism carrying mechanism comprises a base and a pair of prism carrying members. The base comprises a base body, a light passing hole disposed at the base body, and a plurality of first sliding assembling parts integrally formed on the same side of the base body. Each of the prism carrying members comprises a carrying member body, a prism assembling part disposed at the carrying member body and corresponding to the light passing hole, and a plurality of second sliding assembling parts integrally formed on the same side of the carrying member body. The prism assembling parts of the pair of prism carrying members are oppositely and alternately disposed in an axial direction. The plurality of second sliding assembling parts are slidably assembled to the plurality of first sliding assembling parts respectively.

Abstract: A user terminal positioning method is used in an edge cloud server, and includes: receiving satellite positioning information sent by a user terminal; determining a location service area in which the user terminal is located; on the basis of the location service area, acquiring a differential correction model corresponding to the location service area from a public cloud server; using the satellite positioning information and the differential correction model to implement location calculation to obtain location information of the user terminal; and sending the location information to the user terminal.

Abstract: Disclosed in embodiments of the present disclosure are a communication terminal, a communication system and an audio information processing method, the communication terminal includes a sound reception assembly and a basic communication module, wherein the basic communication module of the communication terminal receives second pickup audio information in a wireless manner, such that the communication terminal acquires returned audio information according to first pickup audio information generated by the communication terminal and the received second pickup audio information, and transmits outwards the returned audio information. Therefore, the technical solution in the embodiments of the present disclosure may realize synchronous sound reception of a plurality of wireless sound reception apparatuses or wireless sound reception components, and may satisfy a requirement for multiple people to use, thereby achieving a good sound reception effect.

Abstract: The present disclosure provides a geomagnetic positioning device, comprising a base assembly and a connecting assembly. The base assembly comprises a control component, a driving component, and a first geomagnetic component. The control component is electrically connected with the driving component and the first geomagnetic component. The connecting assembly is disposed at the driving component and comprises a second geomagnetic component. Wherein the control component obtains the deviation angle of the second geomagnetic component relative to the first geomagnetic component. The control component controls the driving component according to the deviation angle to adjust the relative angle of the connecting assembly relative to the base assembly.

Abstract: A noise detection method includes: inputting a key audio signal with multiple frequencies to an audio device to be tested; measuring a first output audio signal emitted by the audio device to be tested; performing an audio analysis on the first output audio signal to generate a measurement signal; and comparing the measurement signal with a qualified signal to generate a comparison result, and determining whether the first output audio signal has noise based on the comparison result.

Abstract: A headphone and a headphone status detection method are provided. A signal processor of the headphone transmits a plurality of code messages to a first audio playback unit, so that the first audio playback unit plays a plurality of first audio signals with different frequencies corresponding to the code messages according to a playback sequence. The signal processor obtains a plurality of first time points at which a first audio receiving unit receives the first audio signals that are reflected for the first time. The signal processor determines a wear status of the headphone according to the plurality of first time points.

Abstract: An authority control system includes a biometric identification unit, a near field communication (NFC) signal transmission unit, and an NFC signal receiving unit. The biometric identification unit stores associated data, configured to obtain first biometric data, obtains encoded data according to the first biometric data and the associated data, and transmits the encoded data. The NFC signal transmission unit is configured to receive the encoded data transmitted by the biometric identification unit, and transmit the encoded data by using an NFC transmission technology. The NFC signal receiving unit stores authorization type comparison data. The NFC signal receiving unit is configured to receive the encoded data transmitted by the NFC signal transmission unit, and determines an authorization type according to the encoded data and the authorization type comparison data.

Abstract: Disclosed is an earphone system. The earphone system includes a charging box and an earphone, which is detachably assembled in the charging box. The charging box includes a processing module provided with a first identification time period, a power outputting module and a first switch module. During the first identification time period when the earphone is connected to the charging box, the earphone system is in a test mode, and the first switch module is switched for the charging box to transmit power to the earphone through the power outputting module and the first switch module. After the earphone is connected to the charging box for more than the first identification time period, the earphone system is in a communication mode, and the first switch module is switched for the charging box to transmit a data signal to the earphone through the processing module and the first switch module.

Abstract: Disclosed is an earphone system. The earphone system includes a charging box and an earphone, which is detachably assembled in the charging box. The charging box includes a processing module provided with a first identification time period, a power outputting module and a first switch module. During the first identification time period when the earphone is connected to the charging box, the earphone system is in a test mode, and the first switch module is switched for the charging box to transmit power to the earphone through the power outputting module and the first switch module. After the earphone is connected to the charging box for more than the first identification time period, the earphone system is in a communication mode, and the first switch module is switched for the charging box to transmit a data signal to the earphone through the processing module and the first switch module.

Abstract: An acoustic block manufacturing method includes: mixing zeolite powder with water to form a mixed liquid; making the mixed liquid into an ice cube; providing a vacuum environment to make the ice cube undergo gas phase sublimation; and feeding parylene into the vacuum environment in a manner of chemical vapor deposition to form an acoustic block having a porous structure. The acoustic block can effectively reduce resonance frequency. An acoustic device with acoustic blocks is also provided and has the same effect.

Abstract: The disclosure provides a charging device and a method for positioning an electronic device. The method includes: in response to determining that a positioning request signal from an electronic device is received, enabling multiple antennas; controlling each antenna to receive a first radio frequency signal broadcast by the electronic device, and determining an arrival angle of the first radio frequency signal and a distance between the electronic device and the charging device based on the first radio frequency signal received by each antenna; and determining a relative position between the charging device and the electronic device based on the arrival angle and distance.

Abstract: A graphical ultrasonic module and driver assistance system are provided. The graphical ultrasonic module includes an ultrasonic sensor array and an ultrasonic transmitter array. The ultrasonic sensor array includes three or more ultrasonic sensors, and the ultrasonic sensors form a virtual plane. The ultrasonic transmitter array includes a plurality of ultrasonic transmitters. The geometric center of the ultrasonic transmitter array is substantially the same as the geometric center of the ultrasonic sensor array.

Abstract: A base station determination method includes: acquiring differential positioning information of at least one base station; according to a received satellite positioning signal and at least one group of differential positioning information, respectively calculating a calculation position of a roadside device corresponding to the at least one group of differential positioning information; and determining a target base station from the at least one base station according to the calculation position of the roadside device and the actual position of the roadside device. The target base station is a base station that corresponds to differential positioning information corresponding to a calculation position, the distance between which and the actual position is the least.

Abstract: An information sending method includes: obtaining first information for positioning a terminal device, the first information comprising differential positioning information, or the first information comprising at least one of environmental information or a satellite positioning signal, and differential positioning information; and when the first information satisfies a preset condition, sending the differential positioning information to the terminal device. The method can effectively reduce the sending of unnecessary differential positioning information, thereby avoiding unnecessary energy consumption waste of a roadside device and the terminal device, saving the time of the terminal device to calculate position information, and improving the high-precision positioning efficiency of the system.

Abstract: A flexible flat cable (FFC) includes a first insulation layer, at least one pair of conductors, a plurality of low-k dielectric layers, two second insulation layers, and at least one shielding layer. The pair of conductors is located within the first insulation layer. Each pair of conductors includes a plurality of first conductors, and the first conductors are axially extending and arranged in parallel. The low-k dielectric layers are embedded in the first insulation layer. Each of the pair of conductors or each of the first conductors is covered and surrounded with one low-k dielectric layer. The two second insulation layers are located on two surfaces of the first insulation layer. The shielding layer is located on the two second insulation layers opposite to the first insulation layer.

Abstract: A flexible flat cable (FFC) includes a first insulation layer, at least one pair of conductors, a plurality of low-k dielectric layers, two second insulation layers, and at least one shielding layer. The pair of conductors is located within the first insulation layer. Each pair of conductors includes a plurality of first conductors, and the first conductors are axially extending and arranged in parallel. The low-k dielectric layers are embedded in the first insulation layer. Each of the pair of conductors or each of the first conductors is covered and surrounded with one low-k dielectric layer. The two second insulation layers are located on two surfaces of the first insulation layer. The shielding layer is located on the two second insulation layers opposite to the first insulation layer.

Abstract: A noise detection method includes: inputting a key audio signal with multiple frequencies to an audio device to be tested; measuring a first output audio signal emitted by the audio device to be tested; performing an audio analysis on the first output audio signal to generate a measurement signal; and comparing the measurement signal with a qualified signal to generate a comparison result, and determining whether the first output audio signal has noise based on the comparison result.

Abstract: Disclosed is an earphone system. The earphone system includes a charging box and an earphone, which is detachably assembled in the charging box. The charging box includes a processing module provided with a first identification time period, a power outputting module and a first switch module. During the first identification time period when the earphone is connected to the charging box, the earphone system is in a test mode, and the first switch module is switched for the charging box to transmit power to the earphone through the power outputting module and the first switch module. After the earphone is connected to the charging box for more than the first identification time period, the earphone system is in a communication mode, and the first switch module is switched for the charging box to transmit a data signal to the earphone through the processing module and the first switch module.