Elevator is not a person: Nuvoton-based smart elevator solution

Brief introduction of a program

As the development trend of today's elevators, intelligent elevators reflect the progress and civilization of the society. The difference between an intelligent elevator and an ordinary elevator is that it incorporates more intelligent factors and can provide passengers with more humanized services. Better security, a wider range of applications, and higher efficiency. In the face of poor elevator expansion, complex upgrade and upgrade, low efficiency, etc., the intelligent elevator control system reflects its advantages. The system uses the interface expansion method to separate the general controller of the intelligent elevator control system from the special function controller, which improves the intelligence. The system's scalability and versatility of the elevator can reduce intelligent functions such as invalid door opening, full load detection, automatic energy saving, and low speed self-rescue.

The N32916 acts as a master chip with the ARM926EJ-S core, integrated hardware video decoder, JPEG codec, CMOS camera interface, sound processing unit (SPU), ADC, DAC and TV encoder; maximum resolution of 720 x 480 TV signal output or TFT LCD output of 800 x 600. At present, the CAN bus is widely used in elevators. In this scheme, the CAN bus is selected for communication. The internal and external call boards use the mcu NUC131 series with CAN. The series has multiple sets of UART and PWM for convenient communication and motor control, through the SPI interface and The ISD2360 voice chip is connected to realize the elevator voice broadcast function. The light curtain part uses the Mini51 and the infrared sensor to ensure passengers safely enter and exit the elevator.

Second [display board photo]

Three [scheme block diagram]

Four [system function]

This scheme adopts the communication mode of CAN bus, and uses N32916 as the main control chip to coordinate the operation between each module, which facilitates the expansion and maintenance of the function interface. The N32916 monitors the elevator through a CMOS camera and sound processing unit, and displays the current status of the elevator on the LCD. The main control unit and the internal and external call boards realize the function coordination by UART, and then control the operation between the motor, voice broadcast, light curtain and button touch. The interface mode is shown in the system block diagram.

Five [scheme characteristics]

1, N32916 built-in 32M bit * 16 DDR2, integrated hardware video decoder and other resources, easy to develop, external NAND FLASH quick start;

2. NUC131 has wide temperature and wide anti-interference ability, and has abundant internal resources and I/O control peripheral equipment;

3, 3-channel digital ChipCorder® for storage and high-quality audio playback with audio playback for up to 64 seconds

4. Class D speaker driver with 0.95W power;

5. The light curtain part is composed of an infrared emitter and a receiver installed on both sides of the elevator car door, and the light emitted by one emitting head is received by a plurality of receiving heads to form a multi-channel scanning, when any one of the light rays is blocked. The car door immediately stops and reverses to open until the passenger or the obstacle leaves the warning area, and the elevator door can be normally closed, thereby achieving the purpose of safety protection and avoiding the accident of the elevator jam;

6, capacitive touch mcu anti-AC noise interference, anti-cell phone communication interference, to ensure the system's high reliability.

The six reactors in the 2011 Fukushima Daiichi Nuclear Power Plant catastrophe had been designed by General Electric. Their design had been criticised as far back as 1972.

In March 2011, The New York Times reported that, despite earning $14.2 billion in worldwide profits, including more than $5 billion from U.S. opera

The six reactors in the 2011 Fukushima Daiichi Nuclear Power Plant catastrophe had been designed by General Electric. Their design had been criticised as far back as 1972

In March 2011, The New York Times reported that, despite earning $14.2 billion in worldwide profits, including more than $5 billion from U.S. operations, General Electric did not owe taxes in 2010. General Electric had a tax refund of $3.2 billion. This same article also pointed out that GE has reduced its American workforce by one fifth since 2002. The Times also reported that General Electric had been engineering tax reductions starting with the fees paid on its 1892 New York State charter.

tions, General Electric did not owe taxes in 2010. General Electric had a tax refund of $3.2 billion. This same article also pointed out that GE has reduced its American workforce by one fifth since 2002. The Times also reported that General Electric had been engineering tax reductions starting with the fees paid on its 1892 New York State charter.

General Electric

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