2results about How to "Ease complexity" patented technology

This invention discloses a forward-transmission distributed optical fiber vibration sensor based on time-division multiplexing, belonging to the field of distributed optical fiber vibration sensor technology. It includes: a laser, a first optical coupler, an optical modulator, a first circulator, a second optical coupler, a time-division multiplexing structure, and a photodetector. The output of the laser is connected to the input of the first optical coupler. The output of the first optical coupler is connected to the inputs of both the optical modulator and the second optical coupler. The output of the optical modulator is connected to one end of the optical fiber under test via the first circulator. The other end of the optical fiber under test is connected to the time-division multiplexing structure. One end of the optical fiber under test is also connected to the input of the second optical coupler via the first circulator. The output of the second optical coupler is connected to the photodetector. This invention alleviates the technical problems of high system complexity and high implementation cost in existing technologies.

The application discloses an elevator power-off emergency rescue device, method and elevator. The device comprises a control module, a storage battery, a voltage boosting module, an auxiliary source module and a relay module. The auxiliary source module is connected with commercial power and connected with the control module through the relay module. The control module is used for adjusting the state of the relay in the relay module according to the state of the commercial power, and determining whether to connect the commercial power to the elevator control cabinet or connect the storage battery and the voltage boosting module to the elevator control cabinet. The storage battery is connected with a frequency converter of the elevator control cabinet through the relay module. The storage battery is connected with the voltage boosting module. The voltage boosting module is connected with an integrated power source of the elevator control cabinet through the relay module. The application is beneficial to reducing the complexity of the emergency rescue equipment and improving the working reliability. The application can be widely applied in the elevator control technical field.