The invention relates to the technical field of indoor positioning, and particularly discloses a visible light positioning system for indoor positioning. The visible light positioning system comprisesa plurality of LED lamps. Each of the LED lamps comprises an LED, a control circuit module, a power supply circuit module and a pulse signal generator, wherein the control circuit module is providedwith an electronic switch and electrically connected with the LED through the electronic switch, the power supply circuit module is electrically connected with the control circuit module and used forproviding direct current for the control circuit module, the pulse signal generator is electrically connected with the control circuit module, and the control circuit module changes actual power of the LED through a pulse signal generated by the pulse signal generator so as to control flashing frequency of the LED. By the aid of the high-power LED lamps, the visible light positioning system for indoor positioning is short in system delay and high in positioning accuracy.

visible light positioning system for indoor positioning

The invention relates to a visible light communication-based power distribution system tail end topological structure identification system and method. The system comprises a system main controller, an intelligent electric meter and an intelligent circuit breaker; the master controller comprises an MCU processing module, an LED light emitting and receiving device and a data sending module. The intelligent electric meter comprises an MCU processing module and an LED light emitting and receiving device. The intelligent circuit breaker comprises an MCU processing module and an LED light emittingand receiving device. The ammeter receives the optical signal and converts the optical signal into an electric signal, identifies an addressing request of the master controller, and sends a unique address code to the master controller to establish a primary topological structure. The intelligent circuit breaker adds 01 to the unique address code of the nearest electric meter and sends the unique address code to the master controller, and the master controller establishes a secondary topological structure according to the unique address code of the intelligent circuit breaker. According to theinvention, positioning based on visible light is more accurate, the requirement of topological structure identification in the enclosed space of the distribution box can be met, and the topological structure in the distribution box can be accurately identified.

Visible light communication-based power distribution system tail end topological structure identification system and method

The utility model provides an it is thus clear that optical locating system, include: visible light lighting device more than two, position terminal, each visible light lighting device can form visible light illumination light field, when position terminal is located the visible light illumination light field more than two, confirms the locating information according to the visible light signal ofreceiving, and wherein, the visible light lighting device include: power supply circuit, external control device, address information module, modulation module, the module of adjusting luminance, LEDlamp and illuminating optical system, external control device and address information module are connected to the modulation module, through the locating information formation modulating signal of external control device in with the address information module. It is thus clear that optical locating system simplifies in above -mentioned system, has reduced it is thus clear that optical locating system's cost.

It is thus clear that optical locating system

The invention relates to a musical instrument studying assisting system based on projection. The musical instrument studying assisting system is composed of a single-chip microcomputer control module and a projection prompt module. The single-chip microcomputer control module is composed of an acquisition circuit, a single-chip microcomputer and a driving circuit. The acquisition circuit acquires a music score and inputs the acquired music score into the single-chip microcomputer. The single-chip microcomputer converts the acquired music score to a control signal which corresponds with the music score. After the control signal is driven through the driving circuit, the control signal is input into the projection prompt module. The projection prompt module is composed of a plurality of LED lamp arrays and is controlled by the single-chip microcomputer for performing projection displaying. The projection prompt module is arranged above a musical instrument and projects light to a position which corresponds with the musical instrument. Through projection displaying which corresponds with the music score, a playing prompt function is performed, thereby assisting musical instrument studying. Compared with the prior art, the musical instrument studying assisting system can be applied on various existing musical instruments and can replace a paper music score through projection. Because the musical instrument studying assisting system does not contact with the musical instrument, reconstruction of the musical instrument is not required and the playing effect of the musical instrument is not affected. The musical instrument studying assisting system further has advantages of convenient mounting, convenient detachment, high transplantability, high economical performance and convenient use.

Musical instrument studying assisting system based on projection

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It is thus clear that optical locating system

Musical instrument studying assisting system based on projection