JP2640807B2 - Monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for monitoring the intrusion of an intruder into a building, a facility, or the like, and more particularly to a monitoring device in a place where visibility is difficult, a winding complicated passage, or a shade. The present invention relates to a monitoring device suitable for monitoring an intruder and monitoring an intruder wearing a radio wave non-reflective substance.

[0002]

2. Description of the Related Art A monitoring device for monitoring an intruder such as a human, an animal, or an object that invades a building or a facility,
For example, a monitoring device that emits a radar wave from a transmitting antenna, receives a reflected wave of the emitted radar wave hitting an invading body, and receives the reflected wave at a receiving antenna to monitor the invading body has been put into practical use. However, the monitoring device using this radar wave does not function sufficiently as a monitoring device under the following conditions. In other words, places with poor visibility, such as shade, inflected passages, etc. Intruders with radio-reflective material stuck on the surface

[0003] The above relates to the locational conditions that require monitoring, and in a place with poor visibility such as a curved path, a radar wave having a straight traveling property can reliably catch an intruder. Have difficulty. Further, the above relates to the reflectivity of the radar wave, and an intruder wearing such a non-reflective material of the radar wave does not reflect the radar wave and cannot receive the reflected wave. It was difficult.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to reliably monitor an intruder even in a place where there is a bad view with a bend. It is another object of the present invention to provide a monitoring device capable of surely monitoring an intruder including a non-reflective substance of radio waves.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a monitoring apparatus for monitoring the invasion of an invader such as a human or an animal in a predetermined monitoring area. An electromagnetic field generating cable connected to the main unit for generating an electromagnetic field based on the pulse wave; and an electromagnetic field generated by the electromagnetic field generating cable connected to the receiver unit based on the pulse wave. An electromagnetic field receiving cable is extended in the monitoring area in a substantially parallel state, and the state of the generated electromagnetic field received by the electromagnetic field receiving cable in a state where no intruder enters does not correspond to the electromagnetic field receiving cable. A first waveform corresponding to each reception position of the cable is processed, and a state of the generated electromagnetic field received by the electromagnetic field reception cable in a state where an intruder enters has been used. It was treated as a second waveform corresponding to the respective receiving location, and converts the first and second waveform into a digital amount corresponding to the respective detection position first
And an intrusion position signal calculation processing unit for performing signal processing using the detection position where the difference has been generated by the calculation of the difference between the digital amounts at the respective detection positions of the second waveform as the detection position of the intruder, and the intrusion position signal An image processing unit that performs image processing for displaying the intrusion position processed by the arithmetic processing unit on a screen, and a display unit that displays the intrusion position on the screen based on image processing by the image processing unit are provided. Things.

A monitoring device for monitoring the intrusion of an invader such as a human or an animal in a predetermined monitoring area, wherein the monitoring device is connected to a transmitter for transmitting a pulse wave and generates an electromagnetic field based on the pulse wave. The vertical cable for electromagnetic field generation, and the vertical cable for electromagnetic field reception connected to the receiver unit and receiving the electromagnetic field generated by the vertical cable for electromagnetic field generation based on the pulse wave are alternately substantially parallel to each other. A predetermined number of them, and connected to a transmitter unit for transmitting a pulse wave so as to intersect with the extended vertical cable for generating an electromagnetic field and the vertical cable for receiving an electromagnetic field, based on the pulse wave. And an electromagnetic field receiving horizontal cable connected to the receiver and receiving an electromagnetic field generated by the electromagnetic field generating horizontal cable based on the pulse wave. Almost flat In the state, the state of the generated electromagnetic field received by the electromagnetic field receiving vertical cable in a state where no intruder enters does not correspond to the receiving position of the electromagnetic field receiving vertical cable. The first waveform is processed as a first waveform, and the state of the generated electromagnetic field received by the electromagnetic field receiving vertical cable in a state where the intruder enters has been changed to a second mode corresponding to the respective receiving positions of the electromagnetic field receiving vertical cable. And converts the first and second waveforms into digital quantities corresponding to the respective detection positions, and calculates the difference between the digital quantities at the respective detection positions of the first and second waveforms. The detected position where the intrusion occurs in the vertical position of the monitoring area and the signal processing, and in the state where the intruder does not enter, the electromagnetic field receiving horizontal cable is The state of the generated electromagnetic field received is processed as a third waveform corresponding to the respective receiving position of the horizontal cable for electromagnetic field reception, and received by the horizontal cable for electromagnetic field reception in a state in which an intruder enters. The state of the generated electromagnetic field is processed as a fourth waveform corresponding to each reception position of the horizontal electromagnetic field reception cable, and the third and fourth waveforms are converted into digital quantities corresponding to the respective detection positions. Signal processing for calculating the difference between the digital amounts at the respective detection positions of the third and fourth waveforms and setting the detection position at which the difference has occurred as the detection position of the intruder at the lateral position of the monitoring area. In order to display the intrusion position processed by the intrusion position signal arithmetic processing unit and the intrusion position signal arithmetic processing unit,
An image processing unit for performing image processing for displaying an intersection of respective extension lines from the intrusion position in the vertical position and the intrusion position in the horizontal position as an intrusion position of an intruder in the monitoring area, and the image processing unit And a display unit for displaying the intrusion position on the screen based on the image processing according to (1).

[0007]

[0008]

[Operation] The operation of the present invention is as follows. Pulse wave
A cable for generating an electromagnetic field connected to a transmitter unit for transmitting a signal and a pulse generated based on the pulse wave connected to a receiver unit
When an intruder enters the intruder monitoring area where the electromagnetic field receiving cable that receives the electromagnetic field is extended, the electromagnetic wave received by the electromagnetic field receiving cable does not enter the intruder. The strength of the electromagnetic field and disturbance of the received signal occur. The intrusion of the intruder can be detected by calculating the disturbance of the received signal in the received electromagnetic field processing unit.

This will be described in more detail. The electromagnetic field generating cable connected to the transmitter unit and the electromagnetic field receiving cable connected to the receiver unit are extended in a monitoring area, for example, in a narrow corridor in a substantially parallel state, and have a large area such as a hall. In the case of monitoring the electromagnetic field generating cable and the electromagnetic field receiving cable, a predetermined number of the electromagnetic field generating cable and the electromagnetic field receiving cable are alternately extended, and the electromagnetic field generating cable and the electromagnetic field receiving cable are also intersected with these cables. Are alternately extended by a predetermined number. For the sake of simplicity, the monitoring location for monitoring intruders is considered to be a vertical x horizontal surface.
A cable extending in the vertical direction is called a vertical cable, and a cable extending in the horizontal direction is called a horizontal cable. The transmission and reception of electromagnetic field energy between the electromagnetic field generating cable and the electromagnetic field receiving cable is performed such that the vertical cable is only between the nearest vertical cables and the horizontal cable is only between the nearest horizontal cables. The range of the spread of the electromagnetic field at this time is set so that only the nearest electromagnetic field receiving cable parallel to the electromagnetic field generating cable can receive the electromagnetic field.

Further, the electromagnetic field generated by the vertical cable for generating an electromagnetic field and the electromagnetic field generated by the horizontal cable for generating an electromagnetic field have different frequencies, or the time of generation and reception of the pulsed electromagnetic field is different from that of the vertical cable. The cables are not synchronized, but are shifted alternately so that the occurrences are not overlapped, so that the occurrence and reception occur vertically, and then the occurrence and reception occur horizontally. When an intruder enters the monitoring area of an intruder where such a generating / receiving cable is extended, the electromagnetic field received by the electromagnetic field receiving cable is more electromagnetic than when there is no intruder. The strength of the field, that is, disturbance of the received electromagnetic field occurs. The intrusion of the intruder can be detected by calculating the disturbance of the reception electromagnetic field in the reception electromagnetic field processing unit.

The intrusion position detecting section processes the state of the generated electromagnetic field received in a state where no intruder enters, as a first waveform corresponding to each reception position of the electromagnetic field receiving cable. And processing the state of the received electromagnetic field in a situation where the intruder has entered as a second waveform corresponding to each reception position, and calculating the difference between the first waveform and the second waveform at each detection position. Is calculated, and the position where the difference occurs is the intruding position of the intruder. Also,
By displaying the position where the difference has occurred on the display unit, the intruding position of the intruder can be visually grasped.

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. 1 and 2 are views showing a schematic configuration of the first embodiment. In the figure, a cable for generating an electromagnetic field ( this cable may be a leaky coaxial cable, but an open coaxial cable is used in this embodiment) is provided at a place where an intruder should be monitored, for example, around a safe device or a hall. Are extended vertically and horizontally. In this embodiment, three vertical cables 12, 14, 16 are extended as electromagnetic field generating vertical cables, and three 18, 20, 22 are extended as horizontal electromagnetic field cables. Similarly, the electromagnetic field receiving cables also extend vertically and horizontally, and in this embodiment, three of the electromagnetic field receiving vertical cables 11, 13, and 15 are connected to the electromagnetic field generating vertical cables 12, 14, and 16. Three horizontal cables for electromagnetic field reception 17, 19, 21 extend substantially parallel to the horizontal cables 18, 20, 22 for electromagnetic field generation.
In this embodiment, the intruder 33 is sandwiched between the electromagnetic field generating horizontal cable 20 and the electromagnetic field receiving horizontal cable 19,
In addition, it is located at a position sandwiched between the electromagnetic field generating vertical cable 14 and the electromagnetic field receiving vertical cable 15. Since the vertical and horizontal cables 11 to 22 for generating and receiving electromagnetic fields are flexible and can be freely bent, they can be easily installed in a meandering place or a place bent at a right angle. is there. Further, it is not always necessary to stretch the cables vertically and horizontally in an elongated passage or the like. Is fine.

As the vertical and horizontal cables 11 to 22 for generating and receiving electromagnetic fields, either open coaxial cables or leaky coaxial cables may be used. First, an open coaxial cable will be described. As shown in FIG. 4 (a), the cable has a structure in which an outer conductor 35 of the cable has an infinite number of gaps 34. Is emitted to the outside and spread to a required range (becomes an antenna for generating an electromagnetic field) or receives electromagnetic field energy by reversible reason (becomes a receiving antenna) and is used for mobile communication etc. Cable. This open coaxial cable may also be referred to as a surface acoustic wave coaxial cable.

Next, as shown in FIG. 4B, the leaky coaxial cable has a structure in which slots, that is, elongated holes 36 are provided at predetermined intervals in the outer conductor 37 of the cable. A part of the electromagnetic field propagating through the cable from inside is leaked to the outside (becomes a transmission antenna), or the electromagnetic field is received by reversible logic (becomes a reception antenna), which is also a mobile object. This cable is used for communication and the like.

The horizontal and vertical cables 1 for generating an electromagnetic field
Pulse waves generated from a pulse generator (not shown) are supplied to feed cables 3, 14, 16, 18, 20, and 22.
The transmitters 2 and 7 for the horizontal cable and the vertical cable are connected as the electromagnetic field generator for emission via the transmission line 9. Further, the vertical and horizontal cables 1 for electromagnetic field reception are used.
1, 13, 15, 17, 19, and 21 are connected to horizontal and vertical cable receivers 4 and 8 as the electromagnetic field receiving unit for receiving the electromagnetic field emitted from the electromagnetic field generating cable. The receivers 4 and 8 for horizontal and vertical cables and the transmitters 2 and 7 for horizontal and vertical cables are connected to each other via synchronous cables 6, 24 and 26. Reference numerals 23a, 23b, 23c, 23
d, 23e, 23f, 23g, 23h, 23i, 23
j, 23k and 231 are matching loads connected to the respective cable ends for circuit matching.

Further, to the receivers 4 and 8 for the horizontal cable and the vertical cable, a monitoring control unit 28 serving as the reception electromagnetic field processing unit is connected by receiver output cables 25 and 27. That is, the monitoring control unit 28 has an intrusion position signal calculation processing unit 29, an image processing unit 30, and the like. Of these, the intrusion position signal calculation processing unit 29 will be described first from the determination of the detection position in the horizontal direction. The waveform of the received electromagnetic field corresponding to each of the detection positions in the horizontal direction of the electromagnetic field reception horizontal cables 17, 19, and 21, that is, the detection positions divided from the first detection position to the tenth detection position in this embodiment. As shown in FIG. 3A, a waveform S1 in a normal state where the intruder 33 does not invade and a waveform S2 in a case where the received electromagnetic field signal is disturbed by the invader 33 are generated. Then, the generated waveform is converted into a digital quantity [the digital quantity conversion of the waveform S1 is shown in FIG.
2 is shown in FIG. 3 (C).
The difference between 1 and S2 is calculated, and the waveform position where the difference occurs becomes the intrusion position of the intruder 33 as described later.

Next, the determination of the vertical intrusion position is performed in the same manner. The vertical detection positions of the electromagnetic field receiving vertical cables 11, 13, and 15, ie, in this embodiment, the eleventh detection position to the twentieth detection position. As shown in FIG. 2E, the waveforms of the received electromagnetic field signals corresponding to the respective detection positions divided up to and including a normal waveform s _{1 in} which the intruder 33 does not intrude and the received electromagnetic field signal due to the intrusion of the intruder 33 are shown in FIG. Generates a waveform s ₂ when disturbance occurs. Then, converts the generated waveform into a digital amount [digital amount converted waveform s ₁ in FIG. 2 (F), shows a digital amount converted waveform s ₂ in FIG. 3 (G)], the waveform s ₁ And the difference between s ₂ and s _2, and the waveform position where this difference occurs becomes the penetration position of the intruder 33 in the vertical direction, as described later.

The image processing unit 30 shown in FIG. 1 performs image processing for displaying the intrusion position calculated by the intrusion position signal processing unit 29 on a CRT 32 as the intrusion position display unit.

The CRT 32 displays the intrusion position processed by the image processing section 30. As will be described later, this display indicates the waveform position where the difference between the waveform S1 in the normal state and the received waveform S2 received by the horizontal electromagnetic field receiving cable when the intruder 33 has entered is the intruder. becomes lateral position of 33 invasion, similarly also vertical penetration position reception of the receiving longitudinal cable when there is received penetration of the received waveform s ₁ and intrusion body 33 of the receiving longitudinal cable during the normal generated waveform position of the difference between the received waveform s ₂ that is obtained as a longitudinal position of the entrance of the intruder member 33, after all,
The position of the intruder 33 is displayed.

A buzzer 31 serving as an alarm generating means for sounding an alarm when an intruder 33 is detected is connected to the monitoring controller 28.

In the intruder monitoring apparatus 1 configured as described above, the electromagnetic field energy transmitted from the pulse wave transmitters 2 and 7 shown in FIG. And vertical cables 12, 14, 1
6, 18, 20, 22 and the horizontal and vertical cables 12, 14, 16, 18, 20, 22, 22 for generating the electromagnetic field.
Vertical and horizontal cables 11, 13, 1 for electromagnetic field reception pass through the air in the form of a blind and via feed cables 5, 10.
5, 17, 19, and 21 are received. Therefore, the electromagnetic field energy passes from the electromagnetic field generating cable to the nearest electromagnetic field receiving cable extending almost in parallel with the field generating cable (from the even-numbered cable to the odd-numbered cable in FIG. 1 by a dotted line). When the intruding body 33 appears, the electromagnetic field passing through the interdigitated shape is disturbed, and the disturbance causes the received signal to be disturbed. The received signal is subjected to arithmetic processing by the monitoring control unit 28 to detect and monitor the presence or absence of the intruder 33 and the location of the intrusion.

In this case, first, the intrusion position determination in the horizontal direction will be described. In the intrusion position signal calculation processing section 29 shown in FIG. A reception waveform S1 (see FIG. 3) corresponding to each detected position up to the position is generated. When the intruder 33 enters the third detection position in the example shown in FIG. 1, the electromagnetic field received by the electromagnetic field receiving horizontal cable 19 is shielded and weakened by the intruder 33 at this third detection position. Is disturbed in the reception status of
The reception waveform in this state is generated as a waveform S2 (see FIG. 3). Next, the waveform S1 is converted into a digital value for each detection position as shown in FIG.
Is converted into a digital quantity for each detection position as shown in FIG. Further, the intrusion position signal arithmetic processing unit 29 calculates the difference between the waveforms S1 and S2 converted into the digital amount, and detects the detection position where the difference occurs as shown in FIG. The difference at the third detection position caused by the intrusion of the body 33 is obtained.

Next, the determination of the penetration position in the vertical direction will be described. The intrusion position signal calculation processing section 29 generates a reception waveform s ₁ (see FIG. 3) corresponding to each detection position from the eleventh detection position to the twentieth detection position in a normal state when the intruder 33 does not intrude. . When the intruder 33 enters the sixteenth detection position in the vertical direction in the example of FIG. 1, the electromagnetic field received by the electromagnetic field receiving vertical cable 15 is shielded and weakened by the intruder 33 at this sixteenth detection position. Although the reception state of the electromagnetic field is disturbed, the reception waveform in this state is generated as s ₂ (see FIG. 3). Then, convert the waveform s ₁ to a digital value for each detection position, as shown in FIG. 3 (F), also the waveform s ₂ into a digital amount of each longitudinal detection position each as shown in FIG. 3 (G) Convert. Further, the intrusion position signal calculation processing section 29 calculates the difference between the waveforms s ₁ and s ₂ converted into the digital quantity, and as shown in FIG. In the example, a difference at the sixteenth detection position caused by the invasion 33 is obtained.

Thus, the waveforms S1 and S2, the waveform s₁When
s_TwoIs converted to a digital value at each detection position and
Difference between waveforms S1 and S2 at the output position and waveform s₁
And s _TwoBy calculating the difference between
Therefore, the presence or absence of an intruder is determined by the difference
Direction detection position (that is, the coordinate of the abscissa on the horizontal axis), and
At the vertical detection position (that is, the coordinates on the vertical axis of the entry point)
Therefore, the position where the intruder 33 enters can be determined.

The processing result by the intrusion position signal calculation processing section 29 is displayed on the CRT 32 shown in FIG. That is, first, from the vertical detection position, on the screen of the CRT 32, a scale indicating each detection position from the eleventh detection position to the twentieth detection position is displayed on the vertical axis 32 ',
According to the example in which the intruder 33 has entered and detected at the sixteenth detection position in the vertical direction, the intruder 33 is also positioned at the sixteenth detection position in the vertical direction on the screen of the CRT 32.
Next, regarding the horizontal detection position, the first axis is indicated by the horizontal axis 32 ″.
A scale indicating each detection position from the detection position to the tenth detection position is displayed, and according to the example in which the intruder 33 has entered the third detection position and is detected, the intruder 33 is the CRT 32 The third detection position is also positioned on the screen. Thus, the intruder 33 is the CRT 3
On the screen 2, a black circle is displayed as the intruding position of the intruder at the position of the coordinate axis where the vertical axis and the horizontal axis intersect.

When the monitoring control unit 28 shown in FIG. 1 detects the intrusion of the intruder 33 as described above, it sends an activation signal to the buzzer 31 so that the buzzer 31 sounds and the intruder 33
To inform you of the intrusion. In addition to the sound, an alarm may be issued by, for example, blinking light.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, for example, an intruder is monitored in an elongated place such as a corridor. For this purpose, the electromagnetic field generating cable and the electromagnetic field receiving cable are placed in a substantially parallel state at the monitoring location. Will be extended. That is, in FIG. 5, the electromagnetic field generating cable 102 and the electromagnetic field receiving cable 103 are extended in a substantially parallel state at a place to be monitored. Since the electromagnetic field generating cable 102 and the electromagnetic field receiving cable 103 have flexibility as described above and can be freely bent, they can be easily installed in a meandering place or a place bent at a right angle. Is possible.

The electromagnetic field generating cable 102 is connected to a transmitter 107 similar to the horizontal cable transmitter 2 and the vertical cable transmitter 7 (see FIG. 1) in the first embodiment. The receiving cable 103 also includes the horizontal cable receiver 4 and the vertical cable receiver 8 in the first embodiment.
A receiver 108 similar to is connected. The transmitter 107 and the receiver 108 are connected to the synchronization cable 10
9 are connected to each other. Reference numerals 110a, 11
0b is a matching load connected to the end of the cable for matching the circuit.

The monitor control unit 111 is similar to the monitor control unit 28 in the first embodiment. The monitor control unit 111 includes an intrusion position signal calculation processing unit 112, an image processing unit 113, and the like. ing. Of these, the intrusion position signal calculation processing unit 112 corresponds to each detection position by the electromagnetic field reception cable 103, that is, each detection position divided from the first detection position to the tenth detection position in the second embodiment. As shown in FIG. 6A, the waveform of the received electromagnetic field to be transmitted is similar to the first embodiment, as shown in FIG. A waveform S2 when a signal is disturbed is generated. Then, the generated waveform is converted into a digital amount [the digital amount conversion of the waveform S1 is shown in FIG.
FIG. 6 (C) shows the digital amount conversion of FIG.
The difference between 1 and S2 is calculated, and the position at which this difference occurs (see FIG. 6D) is the position where the intruder 104 enters. These basic detection principles are the same as those described in the first embodiment. The image processing unit 113 displays the intrusion position calculated by the intrusion position signal calculation processing unit 112 on the CRT 114, and furthermore, when the intruder 104 is detected, an alarm sound is generated by the control of the monitoring control unit 111. Is connected in the same manner as in the first embodiment.

In the intruder monitoring apparatus 101 according to the second embodiment of the present invention configured as described above, the electromagnetic field energy transmitted from the pulse wave transmitter 107 is transmitted through the power supply cable 106 to generate the electromagnetic field. Cable 102
Is transmitted from the electromagnetic field generating cable 102 to the electromagnetic field receiving cable 103 through the air in an interdigital manner. In this electromagnetic field receiving cable 103, the electromagnetic field emitted in the IDT shape is
The presence or absence of the intruder 104 and the location of the intrusion are detected and monitored by detecting that the intruder 104 is received in a disturbed state due to the intrusion.

In this case, the intrusion position signal calculation processing section 112
In step (1), a received waveform S1 (see FIG. 6A) corresponding to each of the detection positions from the first detection position to the tenth detection position in a normal state where the intruder 104 does not enter is generated. When the intruder 104 enters the seventh detection position in the example shown in FIG. 5, the electromagnetic field received by the electromagnetic field receiving cable 103 is changed to the intruder 1 at the seventh detection position.
4, the reception state of the electromagnetic field is disturbed, and the reception waveform in this state is changed to a waveform S2 [see FIG.
(A). Next, the waveform S1 is shown in FIG.
It converts the digital value of each detection position (B), the that converts the waveform S2 is a digital value for each detection position, as shown in FIG. 6 (C). In entering position置信No. arithmetic processing unit 112 calculates a difference between the waveforms S1, S2 of each of the detection positions, which are converted into digital quantity. In this example, a difference occurs at the seventh detection position shown in FIG.

As described above, the waveforms S1 and S2 are converted into digital quantities at the respective detection positions to determine the difference between the waveforms S1 and S2 at the respective detection positions. The presence or absence, and the intrusion position of the intruder 104 can be determined based on the detection position where the difference has occurred.

The processing result of the intrusion position signal calculation processing section 112 is based on the processing of the image
It is displayed on 114. That is, the scale indicating the respective detection positions from the first detection position on the horizontal axis 114 'on the screen of the CRT114 to tenth position detection Viewing
It is, according to the example in which the penetration body 104 is detected entering the seventh detection position, the waveform difference penetration member 104 to the display portion of the seventh detection position even on the screen of CRT114 intrusion Displayed as position.

When the monitoring control unit 111 detects the intrusion of the intruder 104 as described above, it sends an operation signal to the buzzer 115, and the buzzer 115 sounds and the intruder 1
This is the same as the first embodiment in that the intrusion of the information 04 is notified.

[0036]

As described above, according to the present invention, it is possible to surely monitor an intruder even in a place where there is a bend where visibility is poor, and it is also possible to infiltrate an electromagnetic field non-reflective material or the like. It is possible to monitor the body, and it is possible to realize a monitoring device for an intruder without any particular weakness. In addition, when installing the device, the installation of the flexible cable is mainly performed, so that the installation is extremely easy, and it is possible to realize an intruder monitoring device that does not require a hand for daily maintenance. it can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a CRT for displaying a detection position.

3A and 3B are diagrams illustrating a detection principle for detecting an intruding position of an intruder, and FIG. 3A is a diagram illustrating a reception waveform S1 received by an electromagnetic field receiving horizontal cable and an intruder in a normal state where the intruder does not intrude. FIG. 7B is a diagram showing a waveform S2 received by the horizontal cable for electromagnetic field reception when disturbance has occurred in the received electromagnetic field due to the intrusion of the electromagnetic wave, and FIG. 8B is a diagram in which the waveform S1 is digitally converted according to each detection position. FIG. 3 (C) is a diagram in which the waveform S2 is digitally converted in accordance with each detection position.
(D) is a diagram showing the difference between the waveforms S1 and S2. Further, (E) drawing the received waveform s ₁ received by the longitudinal cable electromagnetic field received in the normal no invasion of invaders, electromagnetic field received when there is a disturbance in the reception electromagnetic field by the penetration member intrusion is a diagram showing the received waveform s ₂ received the longitudinal cable, (F) drawing is a diagram obtained by digital conversion according waveforms s ₁ in each of the detection positions, (G) FIG each detected waveform s ₂ It is a diagram that has been digitally converted according to the position,
(H) is a diagram showing the difference between the waveforms s ₁ and s ₂ . This figure is drawn horizontally.

FIG. 4 (a) is an external perspective view showing the internal structure of an open coaxial cable (this is called a surface acoustic wave coaxial cable), and FIG. 4 (b) is an external perspective view showing the internal structure of a leaky coaxial cable. .

FIG. 5 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6A is a diagram showing a received waveform S1 received by an electromagnetic field receiving cable in a normal state where no intruder enters, and an electromagnetic field receiving cable when the received electromagnetic field is disturbed by the intruder. FIG. 4 is a diagram showing a waveform S2 received by a cable;
(B) is a diagram in which the waveform S1 is digitally converted in accordance with each detection position, and (C) is a diagram in which the waveform S2 is digitally converted in accordance with each detection position.
(D) is a diagram showing the difference between the waveforms S1 and S2.

[Explanation of symbols]

 1. Monitoring device in the first embodiment 2. Transmitter for horizontal cable 4. Receiver for horizontal cable 7. Transmitter for vertical cable 8. Receiver for vertical cable 11, 13, 15 Electromagnetic field Vertical cable for reception 12, 14, 16 · Vertical cable for electromagnetic field generation 17, 19, 21 · Horizontal cable for electromagnetic field reception 18, 20, 22 · Horizontal cable for electromagnetic field generation 23a to 23l · Matching load 28 · Monitoring and control Unit 29, intrusion position signal arithmetic processing unit 30, image processing unit 31, buzzer 32, CRT 33, intruder 101, monitoring device 102 in the second embodiment 102, electromagnetic field generating cable 103, electromagnetic field receiving cable 107, transmission 108, receiver 111, monitoring control unit 112, intrusion position signal calculation processing unit 113, image processing unit 114, CRT 115, buzzer

Claims (2)

(57) [Claims] 1. A monitoring device for monitoring the invasion of an intruder such as a human or an animal in a predetermined monitoring area, wherein the monitoring device is connected to a transmitter for transmitting a pulse wave and generates an electromagnetic field based on the pulse wave. An electromagnetic field generating cable,
An electromagnetic field receiving cable connected to a receiver and receiving an electromagnetic field generated by the electromagnetic field generating cable based on the pulse wave is extended in the monitoring area in a substantially parallel state, and an intruder enters. The state of the generated electromagnetic field received by the electromagnetic field receiving cable is processed as a first waveform according to each reception position of the electromagnetic field receiving cable in a state where there is no The state of the generated electromagnetic field received by the electromagnetic field receiving cable is processed as a second waveform corresponding to each reception position of the electromagnetic field receiving cable, and the first and second waveforms are respectively processed. The detection position at which the difference is generated by the calculation of the difference between the digital amounts at the respective detection positions of the first and second waveforms is converted into a digital amount corresponding to the detection position. An intrusion position signal calculation processing unit for performing signal processing as a detection position, an image processing unit for performing image processing for displaying a screen of the intrusion position processed by the intrusion position signal calculation processing unit, and the image processing unit A display unit for displaying the intrusion position on the screen based on image processing by the monitoring device. 2. A monitoring device for monitoring the invasion of an invader such as a human or an animal in a predetermined monitoring area, wherein the monitoring device is connected to a transmitter for transmitting a pulse wave and generates an electromagnetic field based on the pulse wave. The vertical cable for electromagnetic field generation, and the vertical cable for electromagnetic field reception connected to the receiver unit and receiving the electromagnetic field generated by the vertical cable for electromagnetic field generation based on the pulse wave are alternately substantially parallel to each other. A predetermined number of them, and connected to a transmitter unit for transmitting a pulse wave so as to intersect with the extended vertical cable for generating an electromagnetic field and the vertical cable for receiving an electromagnetic field, based on the pulse wave. A horizontal cable for generating an electromagnetic field,
A predetermined number of electromagnetic field receiving horizontal cables connected to a receiver unit and receiving an electromagnetic field generated by the electromagnetic field generating horizontal cable based on the pulse wave are alternately extended in a substantially parallel state. In the absence of intrusion, the state of the generated electromagnetic field received by the electromagnetic field receiving vertical cable is processed as a first waveform corresponding to each reception position of the electromagnetic field receiving vertical cable, In the intruded state, the state of the generated electromagnetic field received by the electromagnetic field receiving vertical cable is processed as a second waveform corresponding to the respective reception position of the electromagnetic field receiving vertical cable, and the first and second waveforms are processed. 2
Is converted into a digital amount corresponding to each detection position, and the detection position where the difference is generated by the calculation of the difference between the digital amounts at the respective detection positions of the first and second waveforms is set to the vertical position of the monitoring area. While performing signal processing as a detection position of the intruder in the above, the state of the generated electromagnetic field received by the electromagnetic field receiving horizontal cable in a state where no intruder enters, the respective electromagnetic field receiving horizontal cable of each Processing is performed as a third waveform corresponding to the reception position, and the state of the generated electromagnetic field received by the electromagnetic field reception horizontal cable in a state where the intruder has entered the respective reception positions of the electromagnetic field reception horizontal cable. 4th according to
And converts the third and fourth waveforms into digital amounts corresponding to the respective detection positions, and calculates the difference between the digital amounts at the respective detection positions of the third and fourth waveforms. An intrusion position signal calculation processing unit for performing signal processing for setting a detection position where the occurrence has occurred as a detection position of an intruder at a lateral position of the monitoring area; and calculating the intrusion position processed by the intrusion position signal calculation processing unit. An image processing unit for performing image processing for displaying an intersection of each extension line from the intrusion position in the vertical position and the intrusion position in the horizontal position as an intrusion position of the intruder in the monitoring area for displaying And a display unit for displaying the intrusion position on a screen based on image processing by the image processing unit.