10 results about "Digital Addressable Lighting Interface" patented technology

The invention discloses a DALI (Digital Addressable Lighting Interface) data frame decoding method for Manchester encoding, which solves the problems of poor universality and high bit error rate caused by a fixed clock in the traditional method. The method comprises the following steps: receiving a DALI frame containing a start bit, a data bit and a stop bit; identifying a start bit, measuring the low level length of the start bit for multiple times, taking extreme values Tmax and Tmin, and checking the ratio (1lt; tmax / Tminlt, Tmax / Tminlt; 1 + n) and then T = (Tmax + Tmin) / 2 is calculated; setting two judgment intervals [T-nT, T + nT) and [2T-nT, 2T + nT) (0lt; nlt; 0.5) judging that the duration of the adjacent jump edge is T or 2T; counting edge overturning times in a 2T window from the middle moment of a data bit, keeping a logic value unchanged in two times, and performing negation in one time; and a stop position is detected through 4T in a non-jump manner. Through dynamic time sequence calibration and adaptive decoding, the decoding reliability in a complex environment is improved, the bit error rate is reduced, and the stability and universality of data transmission of the intelligent lighting system are enhanced.

A power supply circuit, a digital addressable lighting interface (DALI) module, a lighting device, and a control method are disclosed. The power supply circuit includes: a power supply circuit (100); an regulating transistor (Q161) configured to be connected between the power supply circuit and a first output port (DA+); a first controller (U160) configured to control the regulating transistor (Q161) to be turned on or off; and a current regulating controller (A) configured to be connected between the power supply circuit and a second output port (DA-), the current regulating controller (A) also being connected between the regulating transistor (Q161) and the first controller (U160), wherein when the current at the second output port (DA-) is greater than a preset value, the current regulating controller (A) reduces the current flowing through the regulating transistor (Q161).

This disclosure pertains to Digital Addressable Lighting Interface (DALI) circuitry, and particularly, to a DALI bus interface circuit for interfacing a device to a DALI bus.

A method (500) for operating a sensor node (100), the method (500) comprising: receiving (S501), by the sensor node (100), a control message according to a wireless communication protocol; and forwarding (S502), by the sensor node (100), the control message to another sensor node (200) in a Digital Addressable Lighting Interface (DALI) network (300) via the DALI network (300).

The utility model discloses a circuit of an LED digital addressable lighting interface power supply based on LLC topology, which relates to the technical field of LLC topology circuits and comprises a single chip microcomputer control circuit module electrically connected with a dummy load control circuit module. The dummy load control circuit module is electrically connected with the 50mA dummy load connection module and the 50mA dummy load disconnection module; when the signal sent by the dimmer to the single chip microcomputer is' ON ', the single chip microcomputer gives out a control signal, the output end of the corresponding circuit to the driving power supply is connected with a 50mA dummy load, and the dummy load can ensure that the IC does not enter a hiccup mode to work when the dimming is 1%, so that stroboflash is avoided; when the signal from the dimmer to the single-chip microcomputer is' OFF ', the single-chip microcomputer gives a control signal to disconnect the dummy load, thereby ensuring that the standby power consumption of the whole power supply can meet the requirement that European Union standard ERP2.0 is less than 0.5 W.

The invention relates to the technical field of lighting device control, and discloses a lighting device detection method and device and a lighting system.The method is applied to a host device of the lighting system, the lighting device comprises the host device and a plurality of slave devices, and the host device communicates with the slave devices through digital addressable lighting interfaces. In the process of addressing a plurality of slave devices by a host device, after an addressing request is sent to the plurality of slave devices, when feedback information of the slave devices in response to the addressing request is detected, the number of the slave devices connected with the host device is counted, so that when the addressing request indicates that the host device completes the addressing operation, the host device can complete the addressing operation. And quickly judging whether the quantity of the slave equipment exceeds the limit or not based on the relationship between the counted equipment quantity and a first threshold value. If the number of the slave devices exceeds the limit, the number of the slave devices exceeding the limit can be quickly and accurately calculated according to the number of the slave devices and the first threshold value.

The invention provides an interface circuit, a driver and a control method. The interface circuit includes: a first digital addressable lighting interface (DALI) interface circuit configured to connect with a first data bus and a controller (MCU), transmit a first signal to the controller, and receive a feedback signal from the controller; and a second DALI interface circuit configured to be connected with the first DALI interface circuit and the second data bus, a signal received from the second data bus is transmitted to the first DALI interface circuit by the second DALI interface circuit, and a signal received from the first data bus can be transmitted to the second DALI interface circuit.

A method and apparatus for reducing delay time of a digital addressable lighting interface (DALI) interface, a DALI interface, and a DALI lighting control system. The method including: receiving a first DALI signal coming from a DALI bus connected to the DALI interface; detecting a voltage difference of the first DALI signal; controlling a first receiving end of a digital isolator according to a detection result; and transmitting the first DALI signal to an MCU through a first transmitting end of the digital isolator. Therefore, lower delay time of the DALI interface is achieved with a simple circuit structure.

The invention relates to the technical field of bus power supply safety, and discloses a lighting equipment power supply control method and a lighting system.The method is applied to a power supply control unit of the lighting system, and the power supply control unit is connected with lighting equipment through a bus conforming to a digital addressable lighting protocol. A power supply switch is arranged between the power supply end and the lighting equipment, the power supply control unit is in communication connection with the power supply switch, and the lighting equipment is provided with a digital addressable lighting interface; the method comprises the following steps: detecting the current input voltage of the lighting equipment; and based on the detection result of the current input voltage, whether the power supply end is adopted to supply power to the bus is controlled through the power supply switch so as to realize bus communication, and the lighting equipment is controlled through the bus. And the problem of current over-limit caused by the fact that multiple power supplies supply power to the bus is effectively avoided.

The utility model provides an ultra-wide emergency voltage adaptive centralized battery power supply emergency lighting controller, which relates to the field of electrical control and comprises an EMC (Electro Magnetic Compatibility) filtering and rectifying circuit, a valley filling circuit, a mains supply detection circuit, a Flyback circuit, an output rectifying and filtering circuit and an emergency switching and DALI (Digital Addressable Lighting Interface) switching circuit. When the commercial power is normal, an input AC voltage is converted into a DC voltage through filtering and rectification, then the DC voltage is converted into a low voltage through the flyback circuit to be output, a constant voltage is output through output rectification and filtering, and stable power supply is provided for the emergency switching and DALI switching circuit to carry out a switching action; when the mains supply is abnormal, the flyback circuit stops working, the emergency switching and DALI switching circuit performs switching action, the power supply is provided by the emergency power supply at the moment, the dimming port is driven to be disconnected, the default maximum brightness is recovered, and dimming cannot be performed. The controller can automatically switch the power supply mode when the commercial power is normal and abnormal, and ensures the reliability of emergency lighting.