JPS623409A - Magnetic card collating device - Google Patents

Abstract

PURPOSE:To enhance the safety of collation by collating the magnetic card, simultaneously reading the magnetic code, temporarily storing it, and setting and changing the collating code of the collating device. CONSTITUTION:To the collating device of a quest room, the address code classified by a class is set. To the magnetic card issued by the front desk, an address code 15, a data code 16, and a memory enable code 17 are recorded. The address code 15 is the same as the address code of the collating device of the designating room, and the data code 16 is classified by the quest. When the quest inserts the magnetic card into the collating device of the room, the address code 15 is collated, and coincident, and when a memory enable code 17 is detected 3, the data code 16 is read, stored 5 temporarily, a collating coincident signal is generated, the memory enable signal is deleted, and unlocked. As long as the card is correctly used, the coincidence of the collation of an address collating device 1 and a main collating device 6 simultaneously occurs, also unchanged after deleting the memory enable code, and unlocking can be executed over and over gain. By the constitution, the magnetic card collating device with a high safety can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic card verification device that compares and verifies magnetic codes of magnetic cards.

[Summary of the invention]

The present invention enables a magnetic card verification device to set and change the verification code of the verification device by reading and temporarily storing the magnetic code of the magnetic card at the same time as performing verification of the magnetic card. This improves the security of verification.

[Previous technology]

A system that uses a combination of a magnetic card verification device, an electric lock, and a magnetic card in a hotel guest room door lock is being considered.
It has been put into practical use. When a guest receives a magnetic card that replaces a conventional mechanical lock from the front desk and inserts it into the magnetic card verification device in the guest room, the magnetic card verification device stores the preset verification code unique to each room and the magnetic card. Only when the codes match, an electrical unlock signal is output to the electric lock, and the door opens.

In hotels with a large number of rooms, there is a need for a system that allows the verification code to be changed daily or for each guest in order to improve safety, so a verification computer is installed at the front desk and installed on each guest room door. A centralized control system has been devised and put into practical use, in which a magnetic card reader is electrically connected to a computer at the front desk, the computer performs verification, and sends an unlock signal to each guest room to open the door.

[Problem that the invention seeks to solve]

With conventional methods in which a magnetic card reader reads the magnetic code recorded on a magnetic card and a computer etc. compares and verifies the code, it is easy to change the collation code one after another in a short period of time. It is necessary to electrically connect the magnetic card reader and the computer, and wiring work is very expensive when using a large number of terminal magnetic card readers. Alternatively, if the distance from the computer is long, malfunctions are likely to occur due to the influence of various electrical noises in the surroundings. Furthermore, because of the centralized control, there is a drawback that the entire system may become inoperable due to a failure of the central control unit such as a computer.

On the other hand, the verification device shown in Japanese Utility Model Publication No. 50-40781, which has a verification function in the magnetic card reader itself without being connected to a computer, does not have the above-mentioned drawbacks, but it is possible to change the verification code. If you try to do this, you have to change the verification code of the cent card in the verification device, so there is a drawback that it takes some effort to change the verification codes one after another in a short period of time.

[Means for solving problems]

To increase the security of verification using magnetic card verification devices,
There are two possible methods: increasing the number of bits for verification and changing the verification code one after another in a short period of time. In the latter method, the present invention is capable of changing the magnetic code of the magnetic card into the verification device when the magnetic card is inserted into the verification device. The above-mentioned problems were solved by adding a temporary storage function and a magnetic detection/erasing function to the conventional magnetic card verification device as shown in Japanese Utility Model Publication No. 50-40781.

In the present invention, a magnetic card having an address code, a data code, and a storage enable code recorded thereon is used. It has a built-in address verifier that verifies the address code of .

This address verifier is based on the conventional verification value W
781), the magnetic code of the magnetic card (set card) built into the verification device is used as the verification code, and the magnetic card (key card) to be verified is inserted and read by the verification device. When the set card and key card reach the position, the magnetic fields generated by the magnetic codes of the set card and key card are applied to the multiple detection elements placed between the set card and the key card by mutual interference, and each detection element receives a constant magnetic field. It generates a match signal when a pattern is detected.

In the present invention, the verification device reads the magnetic code on the magnetic card, and when the address code matches the magnetic code of the cent card built into the verification device, it generates an address code verification match signal, and further generates a storage enable code. When detected, the data code read on the magnetic card is temporarily stored and held in a storage device such as an IC memory built into the verification device (until a different data code is input). In addition to the address verifier, this verification device has a built-in verification device, that is, a main verification device, which uses the data stored in the temporary storage device as the verification code, and the data stored in the temporary storage device and the data code of the magnetic card are combined. Verify. For this verification, an electrical logic verification method using rc can be used. When the address matcher's match and the main match's match are obtained at the same time,
A verification match signal is output to the outside of the verification device.

In addition, when the address verification generates a verification match signal and detects a storage enable code, the data code read on the magnetic card is temporarily stored and retained in the memory device, and at the same time, the storage enable code is automatically detected by magnetic detection. Erase with the head. This magnetic detection head originally detects the storage enable code, but also has the function of erasing it. By this erasure, the magnetic card issued with the storage enable code recorded thereon is allowed to change and set the verification code of the main verification device of the verification device only once. However, even if it is a magnetic card whose memory enable code has been erased, if the address code and data code are appropriate, the address verifier matches, and the main verifier matches, this verification device will send a verification match signal. output to the outside.

〔Example〕

FIG. 1 is a block diagram illustrating a preferred embodiment of the present invention. In the figure, (14) is a magnetic card inserted from the outside of the verification device, and a magnetic code is magnetized in spots in the thickness direction on a magnetic plate with high coercive force made by kneading barum ferrite with resin. . The magnetic cord is configured by a combination of N-pole, S-pole magnetized or non-magnetized. FIG. 2 shows an example of a magnetic cord. In FIGS. 1 and 2, (15) is an address code, (16) is a data code, and (17) is a storage enable code. (1
) is an address verifier, an example of its configuration is shown in FIG. a high-frequency oscillator that supplies a high-frequency oscillator; a switching means controlled by the output obtained at the other end of the plurality of saturable transformers; It consists of a card. When a key card that generates a magnetic field corresponding to the set card is associated with the plurality of saturable transformers, an output is obtained at the other end of the plurality of saturable transformers (Jikkosho). 50-4
(Refer to Publication No. 078141).

(2) is a magnetic reader, which statically reads data codes recorded on a magnetic card (key card) in parallel. As a magnetic head, for example, a saturable core is held almost vertically on an iron substrate, and a winding is applied to the saturable core to form a saturable coil. A high frequency oscillator and a switching power supply are connected to each saturable coil. When a magnetic card is placed close to the end of the saturable core, the magnetic flux generated from the signal points recorded (magnetized) on the magnetic card penetrates the saturable core, changing the inductance of the coil and causing the magnetic signal to change. Read in static state. Such a magnetic reader is known from Japanese Utility Model Publication No. 51-38738. FIG. 4 shows the electric circuit of the reader, and FIG. 5 shows the structure of the magnetic head of the reader.

(3) is a magnetic sensing head, which is a storage enable head.
It also has the function of detecting and erasing codes. This magnetic detection head has a structure in which a hole is drilled at the tip of a wound rod-shaped magnetic core, and a detector is inserted and fixed into the hole so as to detect magnetic flux parallel to the axial direction of the rod-shaped magnetic core. There is. Such a magnetic detection head was developed in 1983-4.
It is known from the publication No. 6012. Figure 6 shows the structure of the head. When a direct current is passed through a coil wound around a rod-shaped magnetic core, the generated direct current magnetic field reverses the magnetization direction of the storage enable code recorded on the magnetic card. magnetized to reverse polarity. The detector fixed in the hole at the tip of the bar-shaped magnetic core is made by winding a saturable core.A bias magnet is fixed close to the saturable core, and a bias magnetic field is applied in the detection direction of the saturable core. is giving. When a magnetic card is placed close to the saturable core, it is affected by the magnetic field of the magnetic signal recorded on the magnetic card, and when the magnetic field is in the same direction as the bias magnetic field, it becomes saturated with a weak magnetic field, and when the magnetic card is placed in the opposite direction, it becomes saturated. It is designed so that it will not be saturated with a weak magnetic field. Therefore, it is possible to saturate the N-pole magnetization recorded on the magnetic card and not to saturate the S-pole magnetization, and detects the change in coil inductance due to saturation as a voltage change, and connects it to the coil. The storage enable code magnetized to the north pole on the magnetic card can be detected by the on/off operation of the switching circuit. Since it does not detect the S-pole magnetized storage enable code,
When a direct current is applied to a coil wound around a rod-shaped magnetic core to magnetize the memory enable code to the south pole, the memory enable code is essentially erased.

+71. (8) are the output lines of the number verifier (1) and the magnetic detection head (3), respectively, and when the address verification match signal and the storage enable code detection signal appear simultaneously on these, the logic AND gate (41 is turned on). This output signal is sent to the data code temporary storage (5) via line (9) as a data code storage command signal.
is applied to the clock input terminal CLK of the magnetic reader (
The data code read by 2) is the output line (11),
(11) The data code is memorized and saved in the temporary storage device (5) via . Logic and gate (
The output signal of 4 is simultaneously applied via line (10) to the magnetic sensing head (3) as a storage enable code erase signal. Then, a direct current flows through the coil wound around the rod-shaped magnetic core of the magnetic detection head (3), and the storage enable code is erased as described above. Reference numeral (12) is an output line of the data code temporary storage unit (5), through which an output signal corresponding to the stored data code is input to the main collation unit (6), which is a logical comparator. The main verifier (6) compares the data code read signal from the line (11) with the temporary memory data output from the line (12), and if they match, the main verifier outputs a matching match to the output line (19). Send a signal. ! ! The i logic and gate (1B) is the line (
When the address matching signal from line 7) and the main matching signal from line (19) are generated simultaneously, the matching device sends the matching signal to the output line (13).

When the magnetic card verification device described above is used in a hotel guest room, a different address code is set for each room in the verification device installed in each guest room. This is done by inserting the above-mentioned address verifier set card into the verification device.The magnetic card issued at the front desk has the address code, data code, and storage enable code recorded on it. When handing a magnetic card to a guest, the address code of the magnetic card handed to the guest is the same as the address code of the verification device in the room used by the guest.
The data code may be randomly assigned or a different code may be entered for each customer.

The guest inserts the handed magnetic card into the magnetic card verification device in the corresponding room. If the address code matches and the storage enable code is detected, the verification device stores the read data code on the magnetic card, simultaneously outputs a verification match signal, and erases the storage enable code. The electric lock on the guest room door is unlocked by the matching signal from the verification device, and the door opens. Even if the guest enters the wrong room and inserts the magnetic card into the verification device in another room, the address code will not match. , nothing changes and the door does not open.

1. As long as the guest correctly inserts the magnetic card into the matching device of the corresponding room and uses it. In the verification device in that room, the address verification device (1) matches the verification match and the main verification! The verification match (6) occurs simultaneously. This remains true even after the memory enable code is erased, allowing guests to open their rooms as many times as they like.

After a guest checks out, the next guest receives a magnetic card with the same address code but a different data code from the front desk.When the next guest inserts the magnetic card into the matching device of the corresponding room, , a data code different from the previous data code is stored in the verification device. In this way, the verification code of the main verification unit (6) of the verification device changes one after another for each customer, so even if the previous customer takes away the magnetic card and later tries to open the room illegally, the address code will match but Since the main verification data code is different, the verification match output will not be output and the door will not open. In this case, the verification device does not perform a storage operation because the storage enable code was automatically erased when the magnetic card was used for the first time.

〔Effect of the invention〕

As explained above, the present invention allows verification codes to be set and changed easily, quickly and safely without using a centralized control system such as a computer, and is therefore most suitable for use in a door lock system for a hotel guest room.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing a preferred embodiment of the present invention, Fig. 2 is a block diagram showing a preferred embodiment of the present invention;
Figure 3 is a diagram showing an example of a magnetic code, Figure 3 is a configuration diagram showing an example of an address verifier used in the present invention, and Figure 4 is a connection diagram showing an example of the circuit of a magnetic reader (data code detection) used in the present invention. 5 is a schematic diagram showing an example of the structure of the magnetic head of the reader, and FIG. 6 is a configuration diagram showing an example of the magnetic detection head used in the present invention. (1)...Address verifier, (2)...Magnetic reader,
(3)...Magnetic detection head, (4)...Logic AND gate (means for issuing a storage command signal and a storage enable/code erase signal'), (5)...Temporary memory,
(6)...Main verifier, (14)...Magnetic card, (
15)...Address code, (16)...Data code, (17)...Storage enable code, (18)
)...Logical AND gate (means to issue a match match output when address match and main match match).

Claims (1)

[Claims] A number verification device that compares an address code recorded on a magnetic card with a preset address code and outputs an output when they match; and a main verification device that reads the data code recorded on the magnetic card. a magnetic reader applied to one input; a magnetic detection head capable of detecting and erasing a storage enable code recorded on the magnetic card; and receiving an output signal of the number verifier and a detection signal of the magnetic detection head. and means for issuing a storage command signal to a storage device that temporarily stores the data code read by the magnetic reader, and a signal for erasing the storage enable code to the magnetic detection head; A main verifier that compares the data code read by the magnetic reader with the data code read by the magnetic reader and outputs an output when they match; A magnetic card verification device comprising means for emitting a.