KR100332264B1 - An Optical Locking Device - Google Patents

Abstract

The present invention discloses an optical lock.

The present invention provides a key by including a light emitting means, a filter, a light receiving means, and a detection switch for detecting a key insertion, a determination circuit for determining the output of the light receiving means, and a driving unit for controlling the lock with the output of the determination circuit. When the light is inserted, light of a specific wavelength passing through the filter is applied to the light receiving means through the filter of the key, and after determining the authenticity of the key, the locking device can be opened and locked.

The key of the locking device according to the present invention is that the filter has a specific position, a specific center wavelength, a specific passband, so that replication is virtually impossible, thereby providing high security.

Description

Optical Locking Device {An Optical Locking Device}

The present invention relates to an optical locking device, and more particularly, to an optical locking device to control the opening and closing of the locking device by allowing light of a specific wavelength to pass through when the key is inserted.

In general, conventional locks are equipped with word locks that can be opened without touching obstacles around the insertion hole, slugs that can rotate freely in the eccentric position of the cylinder in the lock, and penetrate the cylinder and plug to make small holes there. There are many different types of pin tumbler locks that allow the plug to rotate open by a key when the connection location is exactly at the boundary between the cylinder and the plug.

These mechanical locks are a problem that it is difficult to trust the security of the key can be copied by a relatively simple copy device.

Therefore, in recent years, so-called electronic door locks, which consist of a number button, a microprocessor, a solenoid driving circuit operated by a microprocessor, and a lock / opening device operated by a solenoid driving circuit, have become widespread.

This is because the lock state is released by manipulating the number corresponding to the number stored in advance in the microprocessor with the numeric buttons, so there is no need to carry the lock individually.

On the other hand, such a button lock device is a crucial problem that anyone can easily open it just to find out the number.

Therefore, recently, a fingerprint recognition door locking device has appeared, and an example thereof can be seen by Korean Patent Publication No. 99-1548 (name of the invention: fingerprint recognition door locking device), which is a CCD and a photographing device for taking a fingerprint. And a memory unit for storing fingerprint information, a fingerprint judgment unit in contrast with the fingerprint information containing the fingerprint information in advance, and a door operation unit provided in the door to enable the opening and closing operation by a signal command from the fingerprint judgment unit.

Therefore, such a fingerprint recognition door locking device does not operate except a person with a pre-recorded fingerprint has the effect of preventing unauthorized intrusion of the other person, while the other authorized, there is a problem that the access is not possible because the fingerprint is different.

In particular, such a fingerprint recognition door locking device can be used for the purpose of access of a limited number of people, but there is a problem that it is practically impossible to use in places where a large number of people have to enter and exit, it is difficult to spread widely because the price is expensive It is.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an optical locking device that can be used by a large number of people while ensuring high security.

1 is an explanatory view of the principle of the optical locking device according to the present invention.

Figure 2 is a schematic diagram showing the overall configuration of the locking device according to the present invention.

Figure 3 is a schematic diagram showing the main configuration of the locking device according to the present invention.

Figure 4 is a schematic view of the main portion showing another embodiment of the locking device according to the present invention.

5 and 6 are detailed circuit diagrams illustrating a light receiving unit of the locking device according to the present invention;

5 shows an operation when a normal key is inserted,

6 shows an operation when an abnormal key is inserted.

<Description of the symbols for the main parts of the drawings>

1: light emitting means 2,2 ', 2' ': filter

3: key 4: detection switch

5: light receiving means 6: judgment circuit

7: drive unit 8: locking device

9: body

In order to achieve the above object, the present invention provides a filter for allowing only a specific wavelength of light from the light emitting element and the light emitting element to pass through the optical device, a filter installed on the light receiving element, and An optical locking device is provided which has a key provided with a filter in a corresponding position inserted between one filter.

By the above-described configuration, the present invention can provide a key that cannot be duplicated with a conventional machine, thereby securing high security, and also providing an effect that the production cost is not high and can be widely used. .

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

The working principle of the invention is shown in FIG. As can be seen from the above, the present invention provides a light emitting means 1 made of a laser diode or a light emitting diode emitting light of a specific wavelength, a filter 2 for passing only light of a specific wavelength of the light emitting means 1, The detection switch 4 for detecting the insertion of the key 3, the light receiving means 5 for detecting the light passing through the key 3, and the output of the light receiving means 5 Specific wavelength of light passed by the filter 2 and the main body 9 which consists of the drive part 7 for opening or locking the locking device 8 by the determination circuit 6 and the output of the determination circuit 6 which are determined. It consists of a key 3 with a filter 2 passing through it.

In the present invention as described above, since the driving unit 7 is not operated in a state where power is normally applied, it is in a locked state. At this time, when the key 3 is inserted, the tip of the key 3 turns the sensing switch 4 ON. Therefore, the circuit operates to generate light from the light emitting means 1, and only a specific wavelength of the light passes through the filter 2 to reach the key 3.

At this time, light of a specific wavelength reaches the light-receiving portion via the filter 2 formed in the key 3, and therefore, a predetermined output is generated by the determination circuit 6.

Specifically, as shown in FIG. 2, when there are 'N' filters 2 installed adjacent to the 'N' light emitting means 1, the 'N' filters 2 at the correct position in the key 3 are also shown. '') And these filters 2 '' must pass not only the position but also the light of the same wavelength as the 'N' filters 2. The light reaches the light receiving means 5 only when this condition is exactly matched, and the output of the light receiving means 5 controls the driving unit 7 after the authenticity is determined by the determination circuit 6 to control the locking device ( 8) can be opened.

In addition, the present invention can be coded as many as 2 ^N when the 'N' output signal, and in addition to the selective use of a specific wavelength and a large number of selection of the filter (2, 2 ', 2'') position A combination of numbers can be achieved.

For example, in the example shown in FIG. 5, the third and fifth ones of the light receiving means 5 block light, and the other ones are allowed to receive light so that the output of the determination circuit 6 is generated. It is possible to use the determination circuit 6 which connects the output of the device to the AND gate 10 and the AND gate 11 and causes the AND gate 10 to output as the output.

In addition, the decision circuit 6 in the present invention may be an AND gate 10 as shown in FIG. 5 to generate an output by a predetermined input, and of course, other logic circuits may be used in combination.

In this embodiment, all outputs of the NAND gate 11 are at the high level, and the AND gate 10 outputs the high level at this time to control the driving unit 7,

As shown in FIG. 6, if the key 3 is abnormal and the output of all the light receiving means 5 is at the high level, the third and fifth NAND gates 11 are at the low level. Since the output of the gate 10 is at a low level, the driving unit 7 does not operate and the locked state is maintained.

In addition, in the present invention, a filter (2,2 '') is manufactured by specifying a center pass wavelength and a pass bandwidth. When a sophisticated system needs to be manufactured, a narrow bandwidth of several nanometers with a narrow bandwidth is used for high security. The castle can be secured.

As the light receiving means 5, elements such as FETs and APDs made of Cds, Si, Ge, GaAs, and the like can be used.

In addition, in the present invention, as shown in FIG. 4, a filter 2 ′ equal to the center pass wavelength and pass bandwidth of the above-described filter 2 may be additionally installed in front of the light receiving means 5, in which case a more precise sorting operation. Of course this is possible.

In addition, in the present invention, after the locking device 8 is opened in this way, the key can be removed and stored by removing the key so that the detection switch 4 is 'OFF', and the appearance thereof is as shown in FIG. You can keep it like a key.

In this way, the present invention can freely combine the number, position, center wavelength, bandwidth, and the like of the filters 2 ″ installed in the key 3 to obtain a myriad of combinations. The filter 2 ″ installed in the filter 2 ″ is virtually impossible to copy, and is particularly high in security, and since it does not use expensive parts, the manufacturing cost is not high, and thus the filter 2 ″ may be manufactured at low cost.

Claims (2)

Detecting insertion of a light emitting means 1 made of a laser diode or a light emitting diode emitting light of a specific wavelength, a filter 2 for passing only light of a specific wavelength of the light emitting means 1, and the insertion of a key 3. A detection switch 4 for detecting light, a light receiving means 5 for detecting light passing through the key 3, and a determination circuit 6 for determining the authenticity from the output of the light receiving means 5; And the main body 9 for controlling the drive unit 7 with the output of the determination circuit 6, and the key 3 to allow only light of a specific wavelength passed through the filter 2 of the main body 9 to pass therethrough. And a filter (2 ') provided in front of the light receiving means (5) together with a filter (2') configured in the). delete