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Describes the types of electronic security locks and market development

Common electronic security lock includes remote electronic anti-theft locks, keypad electronic code lock, card electronic locks, biometric security lock of four.

    Remote electronic anti-theft lock

    Now common electronic anti-theft lock remote control key remote control and radio remote control two bright. Optical remote control is divided into infrared remote control and visible light remote control, light remote control using a narrow angle optical transmission password, the advantage of the amount of information can be transmitted great fast, the human eye can not spot, they can not light path (the operator and between subjects of electronic security locks) to capture the signal trying to copy machines, so the high degree of confidentiality. Radio remote control can be a great advantage is the amount of information transmission speed, the human eye can not spot, but the emission of the signal dispersion of space, easily captured equipment, so for a "change password", such as the so-called "jump code" "rolling code" (both random change and no clear rules), so even if the signal was captured and no use, copy value. Use the remote electronic anti-theft locks, remote control need to be carefully kept (that is key), but for some applications, this key is a little, may need to use specific battery.

    Electronic keyboard lock

    From the current technology level and market acceptance of view, the most widely used is the keyboard, electronic lock, the product is mainly used in safe, safes and vaults, and also a safe and armored car used. Keyboard, electronic password on the keyboard input, and called almost, it is easy to grasp, its advantage is that the "Password" is recorded in the authorized number of human mind and character, both accurate and reliable and will not lose (except forget) difficult stolen (unless their disclosure). But the password can not be too simple, too simple to easily test the keyboard out to others, or may be bystanders moved to look out, resulting in lack of confidentiality. Of course, the password can not be too complicated, too complex to be confused himself, or the operation of the low success rate for a password, users are. Therefore, in order to carry forward the strengths and overcome weaknesses, keyboard electronic passwords are also constantly developing, such as "arbitrary code" technology allows the authorized person may, at its needs or preferences set the password, used often new; the "automatic changes password, "technology makes this the password will automatically change the password should be entered into the next, change the law is not known to others, so afraid of onlookers moved to look; inventiveness of the" keyboard-order display "technology makes the fixed keys on the keyboard bit characters per show is not fixed, and shows the narrow point of view can only be seen by the operator front, so even if the bystanders moved to look hard to see the action moves out of the password; "multiple code settings" technology allows a single set of codes is not necessarily effective for use over the separation of powers, need to enter a password more than two groups are accepted and approved, greatly improved confidentiality, enter the password if the order qualified or time period, then confidentiality can improve. Enter the password in the process, attempt to limit the test code, often enter the wrong code number or the number of hours entered incorrectly, that "blockade" keyboard, no longer accepts input operation. In short, despite the emerging new electronic anti-theft lock, but the keyboard, electronic anti-theft lock password is still "old is new again", not only playing a leading role in the market, but also frequently as other types of electronic anti-theft lock the auxiliary input means.

    Card electronic anti-theft lock

    Use of "card" as a key electronic anti-theft lock is currently the most active product, no matter how varied the type of card, enter the card in accordance with the operation mode can be divided into contactless cards and contactless cards two categories . It is noteworthy that, due to security requirements of the industry, usually low reliability may not be used, easily copy the card. Contactless card technology now mature, lower prices, applications are more widely; non-contact cards hidden, convenient, great come from behind the trend. Store large amount of information is the card advantage, it not only as a key, but also included a number of personal information, especially for the financial industry pay attention to "verify the identity of" the industry characteristics, and a multi-application card (such as entry, lock, store, pay etc.) brings the convenience of the cardholder. The use of such electronic anti-theft locks, require careful storage card (ie the key), in particular, have lost the mandate as soon as possible to cancel the card.

  Biometric Lock

    Were some of the inherent personality traits (such as hands, eyes, voice characteristics) can not be repeated almost as a "key" is unique (except by force or injury), so make use of biometric e-password anti-theft lock, also particularly suitable for the financial industry pay attention to "verify the identity of" the industry characteristics.

    Because of this "live and grow, to carry" the "key" to highlight the advantages, so the lock will soon spend less stable performance, expensive initial phase, becoming more practical, more and more "features ", was widely welcomed. Today, the rapid development of biometric technology, in addition to the price factor and the volume size factors there are restrictions on the universal, biological characteristics of electronic anti-theft locks in the financial industry's outlook is generally optimistic people. However, high demands confidentiality cases, should not be used alone biometric electronic anti-theft lock, the best is a combination of other electronic information as a password.

    As the numbers, characters, graphics, images, human biological characteristics, and time can be key elements of electronic information, such information can be used in combination to make electronic anti-theft lock access high degree of confidentiality, such as the treasury against strict, complex information requires password electronic anti-theft lock, so in terms of the thieves is "one foot, the law is strong." Combined use of information also enables electronic anti-theft lock may be infinite expansion, product diversification, the user will have a "pick one hundred thousand election complacent it."
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Zero Anti Gravity Q&A

creating anti-gravity?

Or atleast the creation of a zero g environment due to the action of the earth, the struggle against gravity with another source of gravity. If we could suspend some 100 times the density of lead a foot of soil would create a zero-g area. Only the power required to sustain mass as would be enormous. Agree or practical solution? How about a piece of paper in a vacuum tube and suspended above it an inch away a piece 100 pounds of lead suspended by a huge helium balloon. Is the piece of paper float or not?

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