Security system

Abstract

In order to provide a security system and the like that can reduce false alarms, the security system is configured to comprise: a detection unit that detects an intruding object independently for each of a plurality of divided areas, which are obtained by dividing a security area; a detection frequency indication data generation unit that receives, from the detection unit, a detection signal indicating that an object has been detected, identifies a divided area in which the detection signal has been generated, and generates detection frequency indication data which makes it possible to ascertain the occurrence frequency of the detection signal for each of the divided areas; and a processing execution unit that executes prescribed processing on the basis of the detection frequency indication data.

Description

Security System

[0001] The present invention relates to a security system that detects a person who enters a preset security area and issues an alarm.

[0002] In this type of security system, a human detection device composed of a sensor element such as a PIR is used to detect people who have entered a security area. In order to detect only intruders who have entered the security area as reliably as possible, various measures are taken to prevent false alarms in the human detection device, as shown in Patent Documents 1 and 2.

[0003] For example, Patent Document 1 describes a human detection device having a first sensor unit with a detection area that extends substantially horizontally at a fixed height and a second sensor unit with a detection area that extends diagonally downward. This human detection device is configured so that when object detection signals are simultaneously emitted from both sensor units, a human detection signal is output that detects a human, and so an alarm is not sounded even if a short, small animal or the like enters the security area.

[0004] Furthermore, Patent Document 2 discloses a human detection device that allows any area to be masked so that areas where there are sources of false alarms, such as trees, can be excluded from the security area in advance.

[0005] JP 9-101376 JP 2019-144008

[0006] However, false alarms can occur due to factors that cannot be identified at the time of installation (for example, detecting an object outside the area due to reflections from puddles caused by rain, or adjusting the sensitivity of the sensor unit too far), so it is difficult to completely prevent false alarms.

[0007] In light of this problem, the inventor, after accumulating knowledge, first noticed that there are actually far more false alarms than correct alarms, and completed the present invention from this perspective, with the main objective of providing a security system etc. that can reduce false alarms compared to conventional systems.

[0008] That is, the present invention has the following configuration.

[0009] [1] A security system that detects a person who has entered a specified security area and issues an alert, wherein the security area is divided into a plurality of divided areas, and the security system comprises: a detection unit that independently detects an intruding object in each divided area; a detection count suggestion data generation unit that receives a detection signal indicating that an object has been detected from the detection unit, identifies the divided area that generated the detection signal, and generates detection count suggestion data that enables the number of times the detection signal has occurred for each divided area to be determined; and a processing execution unit that executes a specified process based on the detection count suggestion data.

[0010] With this configuration, the number of times a detection signal is generated for each divided area can be determined using the detection count suggestion data. Therefore, if the number of times a detection signal is generated exceeds a considerable number, it is assumed that there is some factor causing a false alarm, and false alarms can be reduced by stopping object detection in that divided area or adjusting the object detection level.

[0011] [2] The security system according to [1], wherein the detection count suggestion data indicates the number of times the detection signal has occurred for each divided area. With this configuration, the operator can more directly grasp the number of times the detection signal has occurred for each divided area.

[0012] [3] The security system according to [1], wherein the detection count suggestion data is a history of the detection signals for each divided area. With this configuration, the reception time (occurrence time) of each detection signal can be known based on the history, so that it is possible to disable the detection signal or adjust the sensitivity level depending on the time or season, for example.

[0013] [4] The security system according to any one of [1] to [3], wherein the detection count suggestion data generation unit records the time when the detection signal was received and generates the detection count suggestion data within a predetermined period based on that time. With this configuration, the detection count suggestion data divided by period is generated, making it possible to enable / disable the detection signal and adjust the sensitivity level, etc., taking into account the divided area, time, and period.

[0014] [5] The security system according to any one of [1] to [4], wherein the processing execution unit performs processing to transmit the detection count suggestion data to another device such as a display. This is a specific example of the processing execution unit. For example, the contents of the detection count suggestion data can be displayed on a display.

[0015] [6] The security system according to any one of [1] to [5], wherein the processing execution unit performs processing to generate a mask signal indicating whether the function of the detection unit for each divided area is ON / OFF or whether each detection signal is enabled / disabled. With this configuration, it is possible to individually set whether to stop object detection in each divided area.

[0016] [7] The security system according to [6], wherein the processing execution unit generates the mask signal based on the detection count suggestion data. With this configuration, whether or not to stop object detection in each divided area is automatically set based on the detection count suggestion data, thereby saving labor, etc. If the processing execution unit generates the mask signal based on operator input, the operator can manually determine whether or not to stop object detection in each divided area.

[0017] [8] The security system according to any one of [1] to [7], wherein the processing execution unit performs processing to generate a sensitivity setting signal indicating the detection sensitivity of the detection unit for each divided area. With this configuration, the object detection sensitivity for each divided area can be individually adjusted.

[0018] [9] The security system according to claim 6, wherein the processing execution unit generates the sensitivity setting signal based on the detection count suggestion data. According to this configuration, the object detection sensitivity in each divided area is automatically adjusted based on the detection count suggestion data, thereby saving labor, etc. If the processing execution unit is configured to generate the sensitivity setting signal based on operator input, the operator can manually adjust the object detection sensitivity in each divided area.

[0019] According to the present invention configured in this manner, it is possible to provide a security system or the like that can reduce false alarms by focusing on the number of detections in each divided area that makes up the security area.

[0020] Fig. 1 is a schematic diagram of an overall security system according to an embodiment of the present invention; Fig. 2 is a schematic diagram of a signal processing circuit in the same embodiment; Fig. 3 is a schematic diagram of a security area in the same embodiment; Fig. 4 is a diagram showing an example of log data in the same embodiment; Fig. 5 is a diagram showing an example of detection count suggestion data in the same embodiment; Fig. 6 is a diagram showing an example of predicted detection count data in a fourth embodiment.

[0021] A first embodiment of a security system according to the present invention will be described below with reference to the drawings.

[0022] [First embodiment] 1. Overall configuration As shown in Fig. 1, a security system 1000 of this embodiment includes a human detection device 100 that detects a person who has entered a predetermined security area, an information processing device 200 that is communicatively connected to the human detection device 100, and one or more terminal devices 300 that are communicatively connected to the information processing device 200 via a LAN such as the Internet N. Each part will now be described.

[0023] 2. Human Detection Device 100 As shown in FIG. 1, the human detection device 100 includes a housing H and a detection unit 1 held in the housing H.

[0024] The housing H is attached to a wall, a pillar, a dedicated support, or the like with its front surface facing the security area, and its mounting height is set to, for example, about 1 to 6 m from the ground or floor.

[0025] 2-2. Detection Unit 1 The detection unit 1 includes a plurality of infrared sensors 11, a signal processing circuit 12, and an optical structure 13, as shown in FIG.

[0026] The infrared sensor 11 is a dual pyroelectric type having two PIR elements mounted in a single can package. Multiple infrared sensors 11 are mounted vertically (up and down) on a substrate (not shown) with their sensor surfaces facing forward. The infrared sensors 11 detect fluctuations in the infrared light incident on their sensor surfaces and output analog output signals indicating the amount of fluctuation.

[0027] 2, the signal processing circuit 12 is formed on a board on which the infrared sensors 11 are mounted, and includes a power supply circuit (not shown) that supplies power to each of the infrared sensors 11, a conversion circuit that compares the value of the analog output signal of each of the infrared sensors 11 with a predetermined threshold value and converts it into a detection signal that is a digital output signal having a value of 1 or 0 depending on the magnitude of the comparison, a sensitivity setting signal receiving circuit that receives a sensitivity setting signal that sets the threshold value, a mask signal receiving circuit that instructs masking of divided areas, etc. The conversion circuit, sensitivity setting signal receiving circuit, and mask signal receiving circuit are configured to operate independently for each of the infrared sensors 11.

[0028] The predetermined threshold value set in the conversion circuit is changeable, and in this embodiment, the threshold value is configured to be changeable in stages (more specifically, in three stages). Note that the threshold value may also be configured to be changeable continuously.

[0029] The optical structure 13 includes a plurality of lenses. These lenses are integrally formed with a transparent body that is provided so as to be exposed on the front surface of the housing. The optical structure 13 may be configured with lenses and mirrors, or may be configured with mirrors only.

[0030] Each lens is provided corresponding to each infrared sensor 11 and defines the angular range of infrared light received by each infrared sensor 11, i.e., the area in which objects are detected. Here, as shown in Figure 3, the inclination angle of the detection area of ​​each infrared sensor 11 relative to the horizontal plane is different, and the security area is divided into near and far directions by each detection area. Note that there may be gaps between adjacent detection areas, or they may overlap without any gaps. These detection areas are the divided areas referred to in the claims.

[0031] According to the above configuration, when an object enters one of the divided areas, infrared rays emitted from the object pass through the lens corresponding to that divided area and are received by the infrared sensor 11 corresponding to that lens, and a detection signal indicating that the object has been detected is output via the signal processing circuit 12 corresponding to this infrared sensor 11.

[0032] That is, the detection unit 1 of this embodiment is configured to be able to independently detect an intruding object for each divided area by including multiple sets each consisting of one lens, a corresponding infrared sensor 11, and a signal processing circuit 12. The detection unit 1 has the function of turning on or off the function of outputting a detection signal for each divided area by including, for example, the mask signal receiving circuit described above. The function of the detection unit 1 can be switched on or off by, for example, switching the detection signal output circuit on or off, or by switching the power supply circuit on or off.

[0033] 3. Information Processing Device 200 Physically speaking, the information processing device 200 is a computer equipped with a CPU, memory, an input / output interface, a communication interface, etc., and functions as a detection count suggestion data generation unit 21, a processing execution unit 22, etc., by the CPU and peripheral devices working together in accordance with a program stored in the memory.

[0034] 3-1. Detection count suggestion data generation unit 21 Here, the detection count suggestion data generation unit 21 receives a detection signal from each of the detection units 1, identifies the divided area that generated the detection signal, and generates detection count suggestion data that enables the number of times the detection signal has been generated for each divided area to be determined.

[0035] For example, the detection count suggestion data generator 21 identifies the divided area that generated each detection signal based on the port number of the input port that received the detection signal. The detection count suggestion data generator 21 obtains the time when the detection signal was received, associates the divided area that generated the detection signal with the corresponding reception time, and stores the associated data in the log data storage unit 23 set in a predetermined area of ​​memory. The log data storage unit 23 of this embodiment compiles the reception history of detection signals from all divided areas and stores it as log data such as that shown in FIG. 4.

[0036] The detection count suggestion data generator 21 references the log data storage unit 23 and generates detection count suggestion data indicating the number of times a detection signal occurred for each divided area within a predetermined period. In this embodiment, the detection count suggestion data generator 21 aggregates the detection signal reception history for each divided area within a predetermined period, which is included in the log data, by dividing it into divided areas and generating detection count suggestion data such as that shown in FIG. 5 . Specifically, the detection count suggestion data here includes the number of detections for each divided area, as well as the detection range and sensitivity setting for each divided area. The detection count suggestion data may not only quantitatively indicate the number of times a detection signal occurred, but may also indicate the number of times a detection signal occurred qualitatively (e.g., high, normal, low).

[0037] This specified period may be set according to a calendar such as a week or a month, or may be set as the most recent specified period such as the past month, or may be set as the entire period after the start of recording of the log data, and can be set as desired.

[0038] Furthermore, the predetermined period need not necessarily be a continuous period, but may be a non-continuous period, such as during the day or night in a certain period, or only on weekends in a certain period.

[0039] The detection count suggestion data may be a history of the detection signals for each divided area, and for example, the above-mentioned log data may be used as the detection count suggestion data.

[0040] 3-2. Processing Execution Unit 22 The processing execution unit 22 executes at least the following three processes based on the detection count suggestion data.

[0041] The first process is a process of transmitting the detection count suggestion data to another device such as a display. The process execution unit 22 may output the detection count suggestion data in a format that can be read by another device. The process execution unit 22 of this embodiment transmits the detection count suggestion data in a table format such as that shown in FIG. 5 to a predetermined terminal device 300.

[0042] The second process is a process of generating a mask signal that turns on or off the function of the detection unit 1 for each divided area. The generated mask signal is transmitted to the human detection device 100. Note that the process execution unit 22 may also perform a process of generating a mask signal that switches between enabling and disabling each detection signal.

[0043] The third process is a process of generating a sensitivity setting signal indicating the detection sensitivity of the detection unit 1 for each divided area. The process execution unit 22 of this embodiment generates a sensitivity setting signal that changes the detection sensitivity of the detection unit 1 for each divided area to one of multiple preset levels of detection sensitivity (here, three levels: high, medium, and low), and transmits this to the human detection device 100. The detection sensitivity corresponds to a predetermined threshold value of the detection unit 1; for example, if the detection sensitivity is increased, the predetermined threshold value will be decreased.

[0044] 4. Terminal Device 300 The terminal device 300 is physically equipped with a CPU, memory, input / output interfaces such as a display, a communication interface, etc., and is, for example, a portable terminal such as a smartphone or tablet, or a fixed terminal such as a personal computer. This terminal device 300 is operated by, for example, an operator who manages the security system 1000. The operator may be, for example, a security dealer (a security company) or an installer (a person who installs equipment).

[0045] The terminal device 300 performs functions such as displaying the detection count suggestion data received from the information processing device 200 on a display and outputting a command signal to instruct the information processing device 200 to perform a specified operation, by the CPU and peripheral devices working together in accordance with the program stored in the memory.

[0046] Examples of command signals include a detection count suggestion data generation command signal that commands the generation of detection count suggestion data, a mask command signal that commands the execution of a process to generate a mask signal, or a sensitivity setting command signal that commands the execution of a process to generate a sensitivity setting signal.

[0047] 5. Operation 5-1. Recording of log data If an object enters any of the divided areas, or some cause of a false alarm occurs (the entry of a small animal, the swaying of trees, or light reflected from puddles, etc.), causing a fluctuation of more than a predetermined threshold in the infrared light incident on the infrared sensor 11 corresponding to that divided area, the detection unit 1 outputs a detection signal to the detection count suggestion data generation unit 21.

[0048] The detection count suggestion data generation unit 21 receives this detection signal and links the divided area in which the object was detected with the time of reception of the detection signal, and adds the result to the log data stored in the log data storage unit 23 .

[0049] In this way, the reception history of the detection signals output by the detection unit 1 for each divided area (here, table data as shown in FIG. 4) is stored in the log data storage unit 23 as log data.

[0050] 5-2. Generation of detection count suggestion data For example, if the detection count suggestion data generation unit 21 is set to generate detection count suggestion data every certain period, then when the certain period has elapsed, the detection count suggestion data generation unit 21 automatically tallyes up the number of detections for each divided area within that period and generates the detection count suggestion data.

[0051] In addition, when a detection count suggestion data generation command signal is received from a terminal device 300 operated by an operator, the detection count suggestion data generation unit 21 tallyes the number of detections for each divided area within the period specified by the signal and generates detection count suggestion data.

[0052] The detection count suggestion data generation unit 21 transmits the generated detection count suggestion data (here, table data such as that shown in FIG. 5 ) to the terminal device 300 via the Internet or the like. An operator operating the mobile terminal can check the detection count suggestion data output on a display or the like.

[0053] 5-3. Masking a divided area or changing the detection sensitivity of a divided area After checking the detection count suggestion data, the operator can perform a predetermined operation on the mobile terminal to send a mask command signal or a sensitivity setting command signal according to the content of the data to the information processing device 200.

[0054] When a mask command signal is transmitted to instruct a process to turn off the function of the detection unit 1 for a certain divided area, the process execution unit 22 that receives this signal generates a mask signal corresponding to the signal and transmits it to the human detection device 100. When the mask signal is received, the mask signal receiving circuit of the human detection device 100 opens the circuit that outputs the detection signal for the specified divided area, thereby stopping the output of the detection signal from that divided area.

[0055] When a sensitivity setting command signal is transmitted to instruct processing to lower the detection sensitivity of the detection unit 1 for a certain divided area, the processing execution unit 22 that receives this signal generates a sensitivity setting signal corresponding to the signal and transmits it to the human detection device 100. The sensitivity setting signal receiving circuit of the human detection device 100 that receives this sensitivity setting signal increases the threshold value of the conversion circuit that corresponds to the specified divided area.

[0056] For example, an operator who checks the detection count suggestion data such as that shown in Figure 5(a) can determine that there is some factor causing a false alarm in divided area B, which has a higher number of detections than the other divided areas, and can decide to lower the detection sensitivity of this divided area B by one level.

[0057] For example, an operator who checks the detection count suggestion data as shown in Figure 5 (b) can decide to turn off the function of the detection unit 1 for divided area D, which has a high detection count, because the set sensitivity for this divided area D is already low.

[0058] For example, an operator who checks the detection count suggestion data shown in Figure 5 (c) can decide to increase the detection sensitivity of divided areas A and B by one level because the number of detections in these divided areas A and B is low.

[0059] 6. Effects With the security system 1000 of the first embodiment configured as described above, the number of times a detection signal is generated for each divided area can be ascertained from the detection count suggestion data. Therefore, if the number of times a detection signal is generated exceeds a considerable number, it is determined that there is some factor causing a false alarm, and object detection in that divided area can be stopped or the object detection level can be adjusted to reduce false alarms.

[0060] The operator or owner can check the number of times a detection signal actually occurred in each divided area and then change the mask or detection sensitivity for divided areas where false alarms are frequent, thereby reducing the annoyance of false alarms while maintaining the operator's or owner's confidence in security. Furthermore, even if a false alarm occurs later due to a false alarm factor that was not identified when the human detection device 100 was installed, this can be dealt with appropriately.

[0061] Since data suggesting the number of detections within a predetermined period is generated, it becomes possible to enable / disable detection signals and adjust sensitivity levels, taking into account not only the divided area but also the time and period.

[0062] Furthermore, by setting this predetermined period to a longer period, it becomes possible to adjust the detection units 1 for each divided area based on more data, thereby enabling more accurate balancing of the frequency of false alarms and security, thereby making it possible to provide a security system 1000 that meets the needs of operators and clients.

[0063] Since the function of the detection unit 1 can be switched on / off for each divided area, it is possible to individually set whether or not to stop object detection in divided areas within the entire security area that have a high number of false alarms.

[0064] Since the detection sensitivity of the detection unit 1 can be changed for each divided area, security can be ensured by increasing the human detection sensitivity as much as possible in each divided area while suppressing the occurrence of false alarms.

[0065] Second Embodiment In the above-described embodiment, the processing execution unit performs processing to generate a mask signal and a sensitivity setting signal based on input from an operator.

[0066] In contrast, the processing execution unit of the second embodiment performs processing to automatically generate a mask signal or a sensitivity setting signal based on the detection count suggestion data. For example, when the number of occurrences of detection signals for each divided area exceeds a predetermined number, the processing execution unit performs processing to generate a mask signal that turns off the function of the detection unit in the divided area that exceeds the predetermined number, or performs processing to generate a sensitivity setting signal that reduces the detection sensitivity of the detection unit in that divided area.

[0067] This allows the object detection sensitivity in each divided area to be automatically adjusted based on the detection count suggestion data, and the detection unit to be automatically switched off, thereby eliminating the need for human intervention and saving labor.

[0068] By having the processing execution unit automatically execute the processing, it is possible to adjust the detection units more finely than if it were done manually, making it possible to, for example, automatically switch the sensitivity of the detection units between day and night, or automatically switch the divided areas to be masked depending on the season, etc. Furthermore, because the masking of divided areas and sensitivity adjustment are performed according to set rules, it is possible to stabilize the balance between the frequency of false alarms and security in the security system without relying on the experience of operators, etc.

[0069] Third Embodiment The processing execution unit in each of the above embodiments adjusts the detection units for each divided area when an input is made by the operator or when the detection count suggestion data is generated.

[0070] In contrast to this, the processing execution unit of the third embodiment adjusts the detection units for each divided area as needed in accordance with a schedule created based on log data, which is a history of detection signals for each divided area.

[0071] This would enable flexible operation of the security system, for example, by predicting the trend in false alarms occurring in each divided area in the following year based on the previous year's log data, and adjusting the detection units for each divided area accordingly throughout the year.

[0072] [Fourth embodiment] A log data storage unit according to a fourth embodiment stores analog data based on analog output signals output by infrared sensors and corresponding multi-valued data. The log data storage unit may store analog data output from infrared sensors in divided areas whose detection functions are set to OFF.

[0073] The information processing device of the fourth embodiment functions as an expected detection count data generator in addition to the functions of the above-mentioned components. The expected detection count data generator generates expected detection count data that allows the number of times a detection signal is expected to occur at a hypothetical sensitivity setting when the set detection sensitivity is changed to be known. The expected detection count data generator may also generate expected detection count data that allows the number of times a detection signal is expected to occur when the detection function is turned on in a divided area where the detection function is turned off to be known.

[0074] The predicted detection count data is, for example, table data as shown in Fig. 6, and is displayed on a display or the like together with the detection count suggestion data. Here, both predicted detection count data when the sensitivity setting is changed in an increasing direction and predicted detection count data when the sensitivity setting is changed in a decreasing direction are generated. Note that predicted detection count data may be generated by setting multiple assumed sensitivities in the increasing or decreasing direction of the sensitivity setting.

[0075] By checking the expected detection count data, operators can easily decide whether to increase, decrease, or turn off the sensitivity for each divided area, and by how much. This makes it possible to install a security system with low detection sensitivity or with the detection function turned off for some or all divided areas, and then check the expected detection count data after installation to set up the security areas. This makes it possible to postpone the setting up of security areas, reducing the amount of work required on-site when installing the security system and lowering the psychological hurdle required to decide on the setting up of security areas.

[0076] Other Embodiments In the security systems of the above-described embodiments, the security area is divided in the near and far direction, but it may also be divided in the left and right direction or in a matrix.

[0077] The signal processing circuit is an analog circuit formed on a substrate, but may be a digital circuit formed by a microcomputer or the like mounted on the human detection sensor.

[0078] In the above embodiments, each infrared sensor corresponds to one lens and does not share the lens with other infrared sensors, but multiple infrared sensors may have a detection area defined by a shared lens. Conversely, one infrared sensor may correspond to multiple lenses and detect infrared rays from multiple detection areas.

[0079] In the above embodiments, a detection signal is output based on the amount of fluctuation in the infrared light received by one infrared sensor, but a detection signal may be output when two or more infrared sensors simultaneously detect fluctuations in the infrared light. When the detection unit outputs a detection signal based on such so-called AND detection, the detection count suggestion data may include the detection method for each divided area (for example, whether or not AND detection is used), etc.

[0080] In this case, for example, by configuring the system to output a detection signal when infrared fluctuations are detected by both an infrared sensor whose detection area is inclined with respect to the horizontal direction and an infrared sensor whose detection area is aligned with the horizontal direction, it becomes possible to detect people within a security area with higher accuracy. Furthermore, if it is possible to switch between using multiple infrared sensors for AND detection or not, it becomes possible to switch between using AND detection to increase detection accuracy within a security area, or increasing detection sensitivity in a security area without using AND detection, based on the detection situation in each divided area after the security system is installed.

[0081] The detection unit in each of the above embodiments uses the same number of infrared sensors as the number of divided areas, but it may also be configured with, for example, only one infrared sensor, and use a scanning mechanism such as a galvanometer mirror as the optical structure to scan the detection area of ​​one infrared sensor in time series, thereby dividing the security area based on the time series data.

[0082] Furthermore, although the detection unit in each of the above embodiments includes a dual-type infrared sensor equipped with two PIR elements, it may also include a single-type infrared sensor equipped with one PIR element or a quad-type infrared sensor equipped with four PIR elements. Furthermore, the sensor included in the detection unit is not limited to one equipped with a PIR element, and various types of sensors can be used, such as an active infrared sensor, a radar sensor using microwaves or millimeter waves, or a camera sensor using an image sensor.

[0083] The terminal device of the first embodiment displays detection count suggestion data in tabular form on a display, etc., but it may also display a schematic diagram or photograph of the security area that displays the detection count for each divided area so that it can be understood.

[0084] In each of the above-described embodiments, the security system is configured by combining a human detection device, an information processing device, and a mobile terminal, but the physical configuration of the security system according to the present invention is not limited to this.Furthermore, the locations where each component is physically located are not limited to the locations shown in each of the embodiments.

[0085] For example, the security system may be composed of a human detection device and an information processing device. In this case, the functions performed by the terminal device in each of the above embodiments may be performed by a CPU or the like of the information processing device. For example, the functions of the detection count suggestion data generation unit and the log data storage unit may be performed by a CPU or the like installed in the human detection device. In this case, the log data can be managed in a distributed manner by the human detection sensor, and when building a security system equipped with multiple human detection sensors, the load on the system side (information processing device) that integrates and processes the data is reduced. For example, the signal processing circuit provided in the human detection sensor device in each of the above embodiments may be provided in the information processing device.

[0086] According to the present invention, the number of times a detection signal is generated for each divided area can be grasped using the detection count suggestion data, and therefore, if the number of times a detection signal is generated exceeds a considerable number, it is assumed that there is some factor causing a false alarm, and object detection in that divided area can be stopped or the object detection level can be adjusted to reduce false alarms.

[0087] REFERENCE SIGNS LIST 1000 Security system 100 Human detection device H Housing 1 Detection unit 11 Infrared sensor 12 Signal processing circuit 13 Optical structure 200 Information processing device 21 Detection count suggestion data generation unit 22 Processing execution unit 300 Terminal device

Claims

1. A security system that detects and reports a person who has entered a predetermined security area, wherein the security area is divided into a plurality of divided areas, and for each divided area, there is a detection unit that independently detects an intruding object, and a detection frequency suggestion data generation unit that receives a detection signal indicating that an object has been detected from the detection unit, identifies the divided area in which the detection signal was generated, and generates detection frequency suggestion data that enables the number of occurrences of the detection signal for each divided area to be grasped, and a processing execution unit that executes a predetermined process based on the detection frequency suggestion data. The security system is characterized by comprising these components.

2. The security system according to claim 1, wherein the detection frequency suggestion data indicates the number of occurrences of the detection signal for each divided area.

3. The security system according to claim 1, wherein the detection frequency suggestion data is the history of the detection signal for each divided area.

4. The security system according to claim 1, wherein the detection frequency suggestion data generation unit records the time when the detection signal is received and generates the detection frequency suggestion data within a predetermined period based on that time.

5. The security system according to claim 1, wherein the processing execution unit performs a process of transmitting the detection frequency suggestion data to another device such as a display.

6. The security system according to claim 1, wherein the processing execution unit performs a process of generating a mask signal indicating ON / OFF of the function of the detection unit for each divided area or valid / invalid for each detection signal.

7. The security system according to claim 6, wherein the processing execution unit generates the mask signal based on the detection frequency suggestion data.

8. The security system according to claim 1, wherein the processing execution unit performs a process of generating a sensitivity setting signal indicating the detection sensitivity of the detection unit for each divided area.

9. The security system according to claim 8, wherein the processing execution unit generates the sensitivity setting signal based on the detection frequency suggestion data.

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