摘要:
An exemplary system for assisting a driver while reversing his or her car is used in conjunction with the car being fitted with a real-time information acquiring module to collect information concerning a road behind the car. The system includes a wireless communication device for wirelessly communicating with the real-time information acquiring module. The wireless communication device includes a detection module to detect movement information of the car, and a control module to compare the movement information with pre-stored standard parameter information. The standard parameter information can include the acceleration value of the car becoming zero, and a backward movement beginning within 20 seconds after the acceleration value becomes zero. The control module signals the real-time information acquiring module when the movement information matches the pre-stored standard parameter information. The wireless communication device further includes a display to display information of the road at the rear of the car.
摘要:
A method for booting up and shutting down an electronic device is applied in the electronic device. The electronic device includes a processor, a first storage, and a second storage. The speed of the processor accessing data from the first storage is faster than the speed of the processor accessing data from the second storage. The second storage stores the boot data for booting up the electronic device. The method includes: receiving signals for booting up the electronic device; detecting whether the first storage stores the boot data; and obtaining the boot data from the first storage to boot up the electronic device if the first storage stores the boot data. A related electronic device is also provided.
摘要:
A speed measuring system for measuring the speed of a wireless communication terminal communicating with a base station includes an angle measuring unit, a distance measuring unit, a time measuring unit, and a speed calculator. The base station includes a signal tower and an antenna on the signal tower. The signal tower defines a central longitudinal axis perpendicular to the antenna, and the axis intersects the antenna at a point. The angle measuring unit measures an included angle between signal from the wireless communication terminal at any location and the antenna. The distance measuring unit measures a distance between the wireless communication terminal at any location and the point. The time measuring unit measures the time the wireless communication terminal takes from a first location to a second location. The speed calculator calculates the speed of the wireless communication terminal.
摘要:
A speed measuring system for measuring the speed of a wireless communication terminal communicating with a base station includes an angle measuring unit, a distance measuring unit, a time measuring unit, and a speed calculator. The base station includes a signal tower and an antenna on the signal tower. The signal tower defines a central longitudinal axis perpendicular to the antenna, and the axis intersects the antenna at a point. The angle measuring unit measures an included angle between signal from the wireless communication terminal at any location and the antenna. The distance measuring unit measures a distance between the wireless communication terminal at any location and the point. The time measuring unit measures the time the wireless communication terminal takes from a first location to a second location. The speed calculator calculates the speed of the wireless communication terminal.
摘要:
An object locating system comprises a remote control locator and an electronic device. The remote control locator includes a start button, and an electromagnetic-wave emitter. The electromagnetic-wave emitter is configured to emit electromagnetic wave by activation of the start button. The electronic device includes a battery, an electromagnetic detecting unit, a notifying unit and a switch unit. The electromagnetic detecting unit is configured to detect electromagnetic wave emitted by the electromagnetic-wave emitter and induce a current according to the detected electromagnetic wave. The notifying unit is configured to output a locating signal. The switch unit is configured to electrically connect the battery to the notifying unit in response to the induced current, thereby activating the notifying unit.
摘要:
A device for ring tone output. The device comprises a phone speaker, a ringing speaker, a receiver, a switching device and a micro-controller. The receiver acquires audio data via a traffic channel. The audio data comprises a ring tone. The switching device receives the ring tone and selectively transmits the ring tone to the phone speaker and the ringing speaker. The micro-controller directs the switching device to transmit the ring tone to the ringing speaker.
摘要:
A portable electronic device with power failure recovery, powered by a main power source, the device comprising a power detection module, a processor, a timing unit and a power management unit. The power detection module detects an output characteristic from the main power source and asserts an interrupt signal if the characteristic is below a threshold value. The processor asserts a turn-off signal and an enable signal in response to the interrupt signal. The timing unit asserts a notification signal at a predetermined time interval when the enable signal is asserted. Upon receipt of the turn-off signal, the power management unit disconnects the main power source from a circuit block. Moreover, the power management unit reconnects the main power source to the circuit block when the notification signal is asserted and the output characteristic of the main power source is beyond the threshold value.
摘要:
BCCH signals are emitted from a communication-blocking device with higher power according to system data got from base stations. TMSI of mobile subscribers is collected. Paging of the mobile subscriber is monitored. When it is determined that a mobile subscriber is to receive a call, the communication-blocking device sends blocking RA in all time slots, making the mobile subscriber fail to get the call.
摘要:
The method includes: associating different cell phones to different enciphering and deciphering keys of an asymmetric encryption algorithm. Access information of the network lock corresponding to the cell phone is enciphered by the corresponding enciphering key. Then, the enciphered network lock is stored in the cell phone, and the corresponding deciphering key is recorded in an inerasable memory of the cell phone. The original plaintext access information of the network lock and the enciphering key is stored only in a service provider of the communication network. When the cell phone tries to access the communication network, it deciphers the enciphered network lock using the deciphering key stored in the inerasable memory to verify the network lock of the cell phone.
摘要:
An electronic device with a prompt function includes a display unit, a storage unit, a trigger detecting unit, and a processing unit. The storage unit stores a to-do list recording at least one item and at least one trigger condition. Each of the at least one item is associated with one of the at least one trigger condition. The trigger detecting unit is configured to receive input. The processing unit is configured to compare information of the received input with the at least one trigger condition. If there is a match, the processing unit displays the item associated with the one of the at least one trigger condition on the display unit, and outputs predetermined prompt content. A related prompt method is also provided.