英语翻译：
This design uses the advanced EDA technology and the QuartusII working platform and hardware description language VHDL, designs one kind of electronic combination lock. The design combination lock's password is 4 random decimal digit numbers, the user must be able to change the password under the unlocking position, will lose the wrong password to report to the police, the first two times will be report to the police short for 2 seconds, the third time will be long reports to the police for 6 seconds, will have the high security reliability.