Patent ID: 7233231
Filing Date: 2007-06-19
Classification: B60R,Y10T

Abstract:
1. A vehicle steering wheel lock with a burglar-proof alarm device comprising: a burglar-proof alarm circuit for emit a great sound or a strong flash as an abnormal signal is triggered and a wireless signal is emitted; the burglar-proof alarm circuit having a battery set as a power supply, power from the power supply passing through a switch circuit, a retaining circuit and a regulating circuit to a central processing unit (CPU) which is a programmable operation processor; an oscillating circuit being in the CPU; a sound emitting circuit for emitting sounds as receiving alarms from the CPU; a low pressure detecting circuit including a lower voltage IC for informing PCU when voltage is low; an indicator is flashed in the opening state under the control of the CPU for showing that the burglar-proof alarm circuit is normally operated; the burglar-proof alarm circuit further has an air pressure detecting unit, a supersonic receiving unit and a wireless signal emitting unit; the wireless signal detecting unit having a regulator circuit, a coding circuit, a modulation circuit, a baseband oscillating circuit, a triple frequency circuit, a nine-time frequency circuit, a pass band filter, a first stage power supply, and an output power amplifier; the regulating circuit serving to stable the input voltage; the coding circuit serving to generate coding signals; the modulating circuit serves to modulate the frequency of the signals; signals being processed by the triple frequency circuit, and the nine-time frequency circuit and then being transferred to the pass band filter and then to the first stage power supply, and the output power amplifier for amplifying the signals to be emitted out; the air pressure detecting unit serving to detect the air pressure within a car so as to detect whether the door of a car is opened by using a positive pressure and negative pressure; the air pressure detecting unit including a power filter, a regulating circuit, an air pressure sensor, a low pass amplifier, a positive and a negative wave comparator, and a sensitivity adjusting circuit; signals pass through the air pressure detecting unit includes a power filter, a regulating circuit, an air pressure sensor, a low pass amplifier, and then entering into the positive wave comparator, and the negative comparator circuit so as to determine the variation of the air pressure within the car; then the variation is changed as electronic signals are in the CPU; the CPU performing preset burglar-proof alarm actions; the sensitivity adjusting circuit being formed by mainly a variator; a supersonic detecting unit for detecting movements of objects within the car by emitting supersonic waves and then receiving reflecting supersonic waves and then analyzing the result which is then transferred to the CPU; the supersonic wave detecting unit includes a supersonic wave emitter and a supersonic wave receiver; the supersonic wave emitter having a high frequency circuit, a signal pushing circuit, and a supersonic wave emitting unit; the supersonic wave receiver having a supersonic wave receiving unit, an amplifier, a detecting circuit, a filter, a sensitivity adjust circuit, a low frequency amplifier, a low pass amplifier, a high pass amplifier, and a signal comparator; an infrared receiver having an infrared receiving diode for receiving infrared signals from the portable alarm device, an amplifier for amplifying the signals from the infrared receiver, a signal comparator, and a signal delay and band-broadening circuit, the signals are transferred to CPU; the portable alarm device having an power supply which is a battery set; the battery set being installed with a charging circuit for being connected to an external power supply; power being supplied through a regulator and then being transferred to the CPU; the CPU being a programmer processor for decoding, power on and off, alarming, accessing alarms, clearing alarms, emitting alarms about power deficiency, power saving control, and time sequence control; the CPU having an oscillating circuit; the low voltage detecting circuit having a low voltage IC; an LCD display being controlled by the CPU so as to display the alarm on the LCD display; an accessing memory and a clearing circuit being operated with the CPU; when power is off, the power saving circuit will cause the portable alarm device to be in a power saving power; only the CPU operating and the display being closed for saving power; an infrared signal emitting unit for emitting infrared signals to the burglar-proof alarm circuit for actuating the burglar-proof alarm circuit and checking the affectivity of input codes; or the burglar-proof alarm circuit being remote-controlled to a delay alarm process; the portable alarm device including a wireless wave receiving unit; the wireless wave emitting unit including a receiving antennal circuit, a high frequency amplifier, a band pass filter, a local oscillating circuit, a mixing circuit, a middle frequency circuit, and a second middle frequency IC; the receiving antenna circuit being for adjusting the harmonic receiving frequency for receiving high frequency signal, which is then passed through the high frequency amplifier, band pass filter, local oscillating circuit, and the mixing circuit; the local oscillator circuit having a baseband oscillating circuit, a nine-time amplifier circuit, a nine-time frequency modulating circuit for generating an oscillating frequency signal to the mixing circuit for mixing two kinds of signals to have a middle frequency signal; the middle frequency signal being transferred through the middle frequency filter to the second middle frequency IC for filtering, detecting, amplifying and comparing the input signals; and then the signals being inputted to the CPU.