JPH0486589A - Human body detection system with id card - Google Patents

Abstract

PURPOSE:To enable the detection of a man regardless of carrying of an ID card by processing a signal involved in a mutual change in electric field distribution between the ID card and a transmitting/receiving antenna as arranged sandwiching an area through which a man is expected to pass. CONSTITUTION:When a man invades an area A expected to pass from the direction of the arrow P, a change is caused by a human body in an electric field distribution of an ID card 1 and a transmitting/receiving antenna and the electric field distribution of an ID card 2 and an antenna changes being delayed. Resulting two signals are processed with a signal processing computer to detect the invasion of the man. When the man invades from the direction of the arrow Q, he is detected with the cards 2 and 1 sequentially to recognize the invasion of the man from the direction of the arrow Q. As a pseudo Doppler effect is not expected as an electric field is stationary between the ID cards 1 and 2 and the antenna. Thus, with the invasion of the man into this detection area, a change in the electric field, namely, reflective agitation is caused, a condition which is equivalent to that as if the ID cards 1 and 2 were to move in one way or another.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a human body detection system using an ID card using microwaves.

(Conventional technology) ID card systems are systems that verify the identity of people carrying ID cards, and are widely used as magnetic (contact type), indirect (contactless) systems that use microwaves, or light. .

(Problem to be Solved by the Invention) In the ID card system using microwaves, if an abnormality occurs in the ID card such as the battery built into the ID card deteriorating, the signal from the ID card will not be notified and the ID card will not be carried. cannot be confirmed.

Therefore, as a countermeasure to this problem, a device separate from the ID card system is required to confirm the entry and exit of people.

(Means for solving the problem) The ID card system using microwaves is
This is a system that identifies a person by capturing signal changes caused by vector rotation of the electric field between the D card and the corresponding signal processing means.

The inventor focused on this principle and developed a system that uses this system to detect the movement of people based on a new idea.

(1) of this invention is to arrange an ID card on one side of the area where a person is expected to pass, and on the other side, a transmitting/receiving antenna connected to a signal processing means corresponding to these ID cards. A human body detection system using an ID card that detects the passage of a person by processing a signal related to a mutual change in electric field distribution between the ID card and the transmitting/receiving antenna due to the passage of the person.

Invention (2) is a system in which, in the system of invention (1), the signal processing means also has a signal processing function corresponding to an ID card carried by a person. For example, an ID card carried by a person has data unique to that person.

This invention will be explained with reference to an embodiment shown in FIG.

A is the planned passage area and can be passed as shown by arrows P and Q. On one side of this pass area A, the ID cards 1.2 are placed side by side in the horizontal direction, and on the other side of the expected pass area A, a transmitting/receiving antenna corresponding to this ID card is arranged. is connected to the transceiver and signal processing computer. The signal processing computer is a means for transmitting and receiving signals to and from the ID card 1.2 through the antenna and for processing the signals.

The above system is an example in which two ID cards are used together, but if there is only one ID card, the direction of movement of the person cannot be known, but intrusion can be detected.

Furthermore, if it is also equipped with a signal processing function that corresponds to the ID card that a person carries, it will be possible to detect and discriminate data unique to that person.

(effect) When a person enters the planned passage area A from the direction of arrow P.

First, a change in the electric field distribution between the ID card 1 and the transmitting/receiving antenna occurs due to the human body, and after a time delay, a change occurs in the electric field distribution between the ID card 2 and the transmitting/receiving antenna.

These two signals are processed by a signal processing computer and become a position output to detect that a person has entered from the direction of arrow P. In contrast to the previous case, if a person enters from the direction of arrow Q, ID cards 2 and 1 are detected, indicating that the person entered from direction Q.

Since the electric field between the ID card and the antenna is stationary, a pseudo Doppler effect (output change due to vector rotation due to movement) cannot be expected; when a human body enters this detection area, a change in the electric field, that is, a reflection disturbance, occurs. As if it were an ID
This is equivalent to the card being moved in some direction.

Next, this system can also have a function to identify the ID card that a person carries. Therefore, people passing through this planned passage area A can confirm their identity etc. using this system.

(Effect of the invention) With the structure described above, this invention can detect a person regardless of whether or not he or she is carrying an ID card, and furthermore, if a person is carrying an ID card, the data of that person can be detected by the original ID system. Can be distinguished. This is a system that can be easily adopted by businesses that traditionally use ID cards, and is perfect for crime prevention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a human body detection system using an ID card according to the present invention. Figure 1 Patent originator Nippon Dry Chemical Co., Ltd.

Claims (2)

[Claims] (1) An ID card is placed on one side of the area where a person is expected to pass, and a transmitting/receiving antenna connected to a signal processing means corresponding to these ID cards is placed on the other side. I detect the passing of a person by processing signals related to mutual changes in electric field distribution between the ID card and the transmitting/receiving antenna.
Human body detection system using D card. (2) The signal processing means is a human body detection system using an ID card that also has a signal processing function corresponding to an ID card carried by a person.