JP2652585B2 - Intruder detection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting an intruding object, and in particular, detects an intruding object illegally entering a wide unmanned monitoring area, and automatically classifies the type of the intruding object. TECHNICAL FIELD The present invention relates to a device for detecting an intruding object that can be uniquely identified.

[Prior art] Conventional technologies of this kind are described, for example, in "People battlefield, P6
5 to P71, Hara Shobo by Masateru Tachibana ”is known.

In this detection device, when an intruding object that has entered the monitoring area is detected, the vibration level at the detection point is recorded and displayed stepwise. However, since it is difficult to determine the type of the intruding object by only one vibration sensor record, the operator has visually estimated the type of the intruding object while collating with the recording and display of other types of detector outputs.

For this reason, the burden on the operator is heavy, and a high level of skill is required to identify an intruding object, and more time is required for training the operator.

FIG. 7 is a diagram for explaining a process until the intrusion information is detected by the vibration sensor.

When the intruding object 1 enters the monitoring area, the intruding object 1
Vibration is applied to the ground 2 in contact with the intruding object 1 with the movement of the intruding object 1, and a vibration wave 3 is generated and diffused.

On the other hand, the vibration sensor 4 installed on the ground 2 detects the vibration wave 3 and detects the intrusion of the intruding object 1 as intrusion information.

FIG. 8 is a configuration block diagram showing an example of a conventional detection device.

The vibration wave 3 detected by the vibration sensor 4 as shown in FIG. 7 is directly converted into an electric signal and sent to the reverse terminal 6 as a sensor output 5.

Sensor outputs 5 'and 5 "from other vibration sensors are also input to the transmitting device 6. The transmitting device 6 amplifies the sensor output 5 to a required level and modulates it if necessary. The data is transmitted as vibration data 7 to the receiver 9 via the transmission system 8. Here, the transmission method may be either wired or wireless, and may be relayed if necessary. Then, the vibration data 7 is amplified to the required level,
Alternatively, it demodulates and amplifies as required and sends it to the level discriminator 11 as detection data 10. The detection data 10 includes all the data of each detector.

The level discriminator 11 discriminates the vibration data 7 into several levels (for example, large, medium, and small), and sends it as a level discrimination signal 12 to the recorder and the display 13. The recorder and indicator 13 performs recording and display according to the level of the level discriminator 11.

When there are a plurality of vibration sensors including the vibration sensor 4 and other types of vibration sensors, data of all the vibration sensors are simultaneously recorded and displayed according to the sensor outputs 5, 5 '... Of each vibration sensor. I do.

[Problems to be Solved by the Invention] However, in such a conventional detecting device, although the intruding object can be detected only from the recording and display corresponding to the sensor output of one vibration sensor, the type of the intruding object cannot be identified. could not.

Also, in the method of identifying the type of intruding object by comparing it with the record and display corresponding to the sensor output of the vibration sensor of other models, the operator has to rely on the visual observation of the operator, so the operator has a high level of proficiency. A considerable amount of time was required to identify the type of intruding object required for recording and display corresponding to the detection data of a plurality of sets of vibration sensors.

Also, during the time when the transmission system is used for other purposes,
There is also a problem that the sensor output cannot be transmitted and data is lost.

The present invention has been made in order to eliminate the above-described problems, and enables automatic identification of the type of an intruding object using a single vibration sensor, and furthermore, a substantially larger amount of data is compared with a conventional detection device. It is an object of the present invention to provide an intrusion object detection device capable of transmitting and preventing detection data from being lost even during a time when a transmission system is dedicated for another purpose.

[Means for Solving the Problems] In the first invention, a sensitivity adjuster capable of adjusting the detection sensitivity in accordance with the conditions of the installation location is added to the vibration sensor, and the sensor output is transmitted to the transmission device by the transmission system. An analysis circuit for analyzing the characteristics of the vibration wave to identify the type of the intruding object by analyzing by a linear predictive analysis method before transmitting the analysis data to the type of the intruding object; a memory circuit for storing the identified analysis data; A configuration in which a transmission circuit for sending the signal to the system is added is adopted.

Further, in the second invention, before sending the sensor output to the transmitting end device to the transmission system, measurement and analysis are performed based on the level of the vibration wave and the duration of the vibration, and the characteristics of the vibration wave are extracted to classify the intruding object. , A storage memory circuit for storing the identified analysis data, and a transmission circuit for sending the analysis data to the transmission system.

The sensitivity adjustment function of the sensitivity adjuster added to the vibration sensor according to the first aspect of the invention can be set in advance according to the conditions of the installation location before installation. It is also possible to control it.

[Operation] The sensitivity adjuster according to the present invention performs an operation of adjusting the level of the sensor output converted into an electric signal in accordance with the condition of the installation location and transmitting the sensor output to the sending end device as the sensor output.

The analysis circuit also measures and analyzes the sensor output before sending it to the transmission system, extracts the continuity of the waveform and the energy concentration frequency, extracts the characteristics of the vibration wave, and identifies the type of the object.

The memory circuit stores the analysis result, and the transmission circuit sends the analysis data to the receiver via the transmission system.

Embodiment FIG. 1 is a block diagram showing an embodiment of a detection device according to the present invention.

The output of the vibration sensor 14 is connected to the input terminal of the transmitting device 16, and the output of the transmitting device 16 is connected to the input terminal of the receiving device 9 via the transmission system 8. The output of the receiver 9 is connected to the input terminal of the converter 18, and the output of the converter 18 is connected to the recorder and the display 20.
Is connected to the input terminal.

A sensitivity adjuster 14a is added to the vibration sensor 14 that detects the vibration wave 3 generated by the movement of the intruding object 1,
After the detected vibration wave 3 (see FIG. 7) is converted into an electric signal, the level thereof is adjusted through a sensitivity adjuster 14a, and is sent to the transmitter 16 as a sensor output 15.

The transmitting device 16 is provided with an analyzing circuit 16a and a memory circuit 16b, and a transmitting circuit 16c is added as an interface circuit with the transmission system 8. The analysis circuit 16a analyzes the sensor output 15 by a linear predictive analysis method and extracts the continuity of the waveform and the energy concentration frequency which are the characteristics of the sensor output 15.

At the same time, the connection time of the sensor output 15 is measured, and the sensor output 1 is determined based on the frequency of energy concentration and the continuity of the waveform.
5. Therefore, the type of the intruding object 1 which is the source of the vibration wave 3 is identified as a vehicle or a person. In the case of the intruding object 1, in the case of a person, the number of persons, that is, the size of the person under a certain condition is estimated by collating the "connection time vs. number of persons characteristic" obtained from the measured data from the connection time.

FIG. 2 shows a sensor output 15 when the intruding object 1 is a vehicle.
FIG.

FIG. 3 shows a waveform example of the sensor output 15 when the intruding object 1 is a person. As a result of analyzing the actual measurement data, if the intruding object 1 is a vehicle, the sensor output
The 15 waveforms are continuous and the energy concentration frequency is below 100 Hz.

When the intruding object 1 is a person, the waveform of the sensor output 15 is a transient wave, and the energy concentration frequency exceeds 100 Hz.

FIG. 4 shows a flowchart for identifying the type of the intruding object 1 based on the above data.

The analysis circuit 16a analyzes the sensor output 15 by a linear prediction analysis method (step 401). Then, the continuity of the waveform and the energy concentration frequency, which are characteristics of the sensor output 15, are extracted.

At the same time, the connection time of the sensor output 15 is measured (step 402), and the energy concentration frequency f is extracted (step 403). Then, depending on whether or not the waveform has continuity (step 404), if the energy concentration frequency f is 100 Hz or less in the case of a continuous wave, the intruding object 1 is determined to be a vehicle (steps 405 and 406). . Energy concentration frequency f
Is not 100 Hz or less, this is discarded as inappropriate data (step 407).

If it is not a continuous wave, it is determined that the person is a person if the energy concentration frequency f exceeds 100 Hz (step 408,
409). If it is not a continuous wave and the energy concentration frequency f does not exceed 100 Hz, it is discarded as inappropriate data (steps 408 and 407).

If it is determined that the person is a person as a result of the identification of the intruding object, the number of persons is further estimated using a function of the connection time t (step
410).

In this way, the identification data of the person or the vehicle identified by the analysis circuit 16a is stored in the memory circuit 16b and then sent to the transmission circuit 16c, where necessary, modulated and amplified to a required level, and the processed data is processed. As 17, it is sent to the receiver 9 via the transmission system 8. The receiving end device 9 amplifies the processed data to a required level, or demodulates and amplifies as necessary, and outputs the processed data to the converter 18. The converter 18 converts the output of the receiving end device 9 into conversion data 19 in a format necessary for recording and displaying, and outputs the converted data to a recorder and a display 20. Recorders and indicators 29
At 0, the time, the location of the intruding object 1, the identified type,
Record or display the moving situation every moment.

FIG. 5 is a block diagram showing another embodiment of the present invention.

In the case of the present embodiment, the vibration sensor 4 does not have an additional function, and an additional circuit is provided only in the transmission device 21. The sensor output 5 from the vibration sensor 4 is connected to the input terminal of the transmitting device 21, and the output of the transmitting device 21 is connected to the input terminal of the receiving device 9 via the transmission system 8. The output of the receiver 9 is connected to the input terminal of the converter 18, and the output of the converter 18 is connected to the input terminals of the recorder and the display 20.

Next, the operation of the apparatus shown in FIG. 5 will be described for the case where the intruding object 1 is a vehicle and the vehicle is identified.

The vibration sensor 4 detects the vibration wave 3 (see FIG. 7) generated by the movement of the invading vehicle, converts the vibration wave into an electric signal, and sends out the electric signal as the sensor output 5 to the transmitting terminal 21. The transmitting terminal 21 has an analyzing circuit 21a and a memory circuit 21b, and a transmitting circuit 21c is provided as an interface circuit with the transmission system 8. The analysis circuit 21a measures the vibration level of the sensor output 5 and the duration of the vibration, and compares the vibration level and the vibration duration with the "relation characteristics between the vehicle vibration level and the duration" given in advance from the relationship between the vibration level and the vibration duration. Then, it automatically determines whether the intruding vehicle is a tracked vehicle or a wheeled vehicle. Also, the number of intruding vehicles can be counted from the time course of the vibration level.

FIG. 6 is a graph showing the relationship between the vibration level and the duration of the vehicle. The tracked vehicle region 23 has a high vibration level or a long vibration duration, and a mounting area 23 having a low vibration level or a short vibration duration. It is divided into a wheel region 24 and an indistinguishable region 25 having an extremely low vibration level. The boundaries of each area are obtained from the measured data. The discrimination data of the tracked vehicle and the wheeled vehicle of the analysis result obtained by the analysis circuit 21a is temporarily stored in the memory circuit 21a.
After being stored in b, it is sent to the transmission circuit 21c, where necessary, modulated and amplified to a required level, and processed data 17
Is transmitted to the receiver 9 via the transmission system 8. Receiving machine 9
Then, the processing data 17 is amplified to a required level, or demodulated and amplified as necessary, and output to the converter 18.

The converter 18 converts the output of the receiver 9 into conversion data 19 in a format necessary for recording and display, and outputs the converted data to the recorder and the display 20. The recorder / display 20 records or displays the contents of the conversion data 19 (time, the location of the invading vehicle 1, the determined vehicle type, the moving state, etc.) every moment.

[Effects of the Invention] As described in detail below with reference to the embodiments, in the present invention, a sensitivity adjustment function is added to a vibration sensor or a pre-processing function is added to a sending end device. Can be identified. Therefore, the number of vibration sensors can be reduced.

In addition, since data having a substantially large content can be obtained, data loss can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a detecting device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a vibration waveform due to the travel of a vehicle detected by the device of FIG. 1, and FIG. FIG. 4 is a diagram showing an example of a vibration waveform due to walking of a person detected by the device of FIG. 1, FIG. 4 is a flowchart showing an operation of identifying an intruding object by the device of FIG. 1, and FIG. FIG. 6 is a block diagram illustrating a configuration of a detection device according to an example.
FIG. 7 is a characteristic diagram showing a relationship between a vibration level and a duration of a vehicle used in the analysis circuit of the apparatus shown in FIG. 5, FIG. 7 is a conceptual diagram for explaining detection of intrusion information by a vibration sensor, and FIG.
FIG. 1 is a block diagram showing a configuration of a conventional detection device. In the figure, 1 ... intruding object, 3 ... vibration wave, 4 ... vibration sensor, 8 ... transmission system, 9 ... receiver, 14 ... vibration sensor, 5, 15 ... sensor output, 14a ... ... Sensitivity adjuster, 16
…… Sending machine, 16a …… Analysis circuit, 16b …… Memory circuit, 16
c: transmission circuit, 17: processed data, 18: converter, 19
...... Conversion data, 20 ... Recorder and display, 21 ... Send device, 21a ... Analysis circuit, 21a ... Memory circuit, 21c ...
Transmission circuit.

Claims (2)

(57) [Claims] 1. A vibration sensor for detecting a vibration wave from an intruding object entering a monitoring area, converting the vibration wave into an electric signal, and transmitting the electric signal as a sensor output, and amplifying and modulating the sensor output as necessary to form a transmission system. A detecting device for an intruding object, comprising: a transmitting device that transmits the vibration data to the receiving device via the vibration sensor; and a sensitivity adjuster capable of adjusting a detection sensitivity according to a condition of an installation location is added to the vibration sensor. An analysis circuit for analyzing the sensor output by a linear predictive analysis method before transmitting the sensor output to the transmission system, extracting characteristics of the vibration wave and identifying a type of the intruding object, to the transmitting end device, An intruding object detection device, characterized by adding a memory circuit for storing analysis data and a transmission circuit for transmitting the analysis data to the transmission system. 2. A vibration sensor which detects a vibration wave from an intruding object entering a monitoring area, converts the vibration wave into an electric signal and sends it out as a sensor output, and amplifies and modulates the sensor output as necessary to form a transmission system. An intruding object detection device comprising: a transmitting device that transmits the vibration data to the receiving device via the transmitting device. The transmitting device transmits the sensor output to the transmission system before transmitting the vibration wave level and vibration. An analysis circuit that performs measurement and analysis based on the duration of the vibration wave, extracts characteristics of the vibration wave and identifies the type of an intruding object, a memory circuit that stores the identified analysis data, and transmits the analysis data to the transmission circuit. An intruding object detection device, characterized by adding a transmission circuit for sending out to a system.