JP2006126995A - Monitoring sensor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery-driven monitoring sensor device which can extend the life of a battery. <P>SOLUTION: The monitoring sensor device, which is provided with a human body detecting sensor 1a, is driven by a battery 12 and transmits, to a parent machine, information based on the detection of a human body made by the human body detecting sensor 1a. The monitoring sensor device is provided with; a transmission means 13 which transmits information based on the detection of a human body to a parent machine; an estimation-target information acquisition means which acquires information for estimating the state of a place where the human body detection sensor 1a is installed; and a control means 10 which controls the length of time of transmission regulation in which transmission of the information is regulated based on the detection of the human body to the parent machine based on the information from the estimation-target information acquisition means. At least in the transmission regulation time, the supply of a supply voltage from the battery 12 to the transmission means 13 is regulated to save power consumption. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a monitoring sensor device that includes a human body detection sensor such as a pyroelectric sensor, is driven by a battery, and transmits information based on human body detection from the human body detection sensor to a parent device.

  Attach a monitoring sensor device, including a pyroelectric sensor that detects weak infrared radiation from humans and objects, to the ceiling or wall of a store or office, and the pyroelectric sensor 2. Description of the Related Art A mechanical security system is known in which when an intrusion or the like is detected, a detection signal is transmitted from the monitoring sensor device to a parent machine that is a main body of the monitoring system.

  The master unit monitors the reception of human body detection information from one or a plurality of monitoring sensor devices. When the master unit detects a condition set in advance by the user, the master unit notifies the operator by voice or light emission. Report to a security company with a contract through a telephone line or the like, or send a report message to a set contact address by telephone (see, for example, Japanese Patent Application Laid-Open No. 2004-265254).

  A human body detection sensor using a pyroelectric sensor can detect the movement of a human body at a position away from the sensor. By attaching the human body detection sensor to the ceiling or wall of the room, it is possible to guard a fan-shaped range of about 10 m and a spread angle of 80 ° from the human body detection sensor. Thus, since a wide range can be guarded without contact, pyroelectric sensors are often used as intrusion detection sensors in mechanical guard systems.

  The human body detection sensor is always energized for the purpose of intruder detection, and it is necessary to always perform human body detection. As a connection medium with the parent device, wired connection and wireless (for example, electromagnetic wave) connection are provided. Among these, the monitoring sensor device with a wireless connection method with the base unit does not need to lay wires, so it is widely used when adding such a mechanical security system to an existing building later. ing.

The above-mentioned patent documents and non-patent documents are as follows.
JP 2004-265254 A

  By the way, in the case of a monitoring sensor device in the above-described monitoring system, particularly a monitoring sensor device in a form of being wirelessly connected to a parent device, a battery is used as a power source. In the case of such battery driving, when the battery is exhausted, it is necessary to replace the battery. Further, as described above, since the monitoring sensor device is arranged on the ceiling of a room or the like, battery replacement is a troublesome task.

  As described above, when the monitoring sensor device is driven by a battery, it is necessary to replace the battery periodically. However, in order to reduce the replacement frequency and reduce the maintenance cost, the battery life is prolonged. desired.

  In view of the above points, an object of the present invention is to extend the life of a battery in a battery-driven monitoring sensor device.

In order to solve the above problem, a monitoring sensor device according to the present invention provides:
In a monitoring sensor device comprising a human body detection sensor, driven by a battery, and configured to transmit information based on human body detection in the human body detection sensor to a parent device,
Transmitting means for transmitting information based on the human body detection to the master unit;
In the set transmission restriction time, transmission control means for controlling to stop transmitting information based on the human body detection to the master unit;
An information acquisition means for estimation for acquiring information for estimating the security mode of the parent machine according to the situation of the place where the human body detection sensor is installed;
Transmission restriction time control means for setting and controlling the length of the transmission restriction time based on information from the estimation information acquisition means;
It is characterized by providing.

According to a second aspect of the present invention, the estimation information acquisition means is for estimating the frequency of the human body detection by the human body detection sensor and the situation of the place where the human body detection sensor is installed. As information,
The transmission restriction time control means may control the length of the transmission restriction time based on the frequency of human body detection.

According to a fourth aspect of the present invention, the estimation information acquisition means acquires the brightness detected by a brightness sensor as information for estimating a situation of a place where the human body detection sensor is installed. ,
The transmission restriction time control means may control the length of the transmission restriction time based on the brightness detected by the brightness sensor.

  According to this invention, when the necessity of monitoring is low by controlling the length of the transmission restriction time while monitoring the situation in the monitoring area of the monitoring sensor apparatus by itself, the transmission restriction time is reduced. By extending the length of the battery, unnecessary transmission to the master unit can be eliminated as much as possible, thereby extending the life of the battery.

  In particular, according to the invention of claim 2, in the state where human body detection frequently occurs in an office, it can be estimated that security is not required during the work of employees, and human body detection hardly occurs. In the state, it can be estimated that the employee has gone home and needs to be guarded, and by controlling the transmission restriction time according to the frequency of human body detection by the monitoring sensor, As a result, it is possible to extend the life of the battery.

  Further, according to the invention of claim 4, depending on the brightness detected by the brightness sensor, the state of the monitoring area is the state where the employee has returned home and the lighting is turned off, or the lighting is on during work. By controlling the transmission restriction time according to the lightness detected by the light / dark sensor, it is possible to minimize unnecessary transmission to the master unit and to extend the battery life. it can.

  Hereinafter, a case where an embodiment of a monitoring sensor device according to the present invention is applied to a security system for crime prevention will be described with reference to the drawings.

  FIG. 2 shows a configuration example of a machine security system including the monitoring sensor device of this embodiment. As shown in FIG. 2, the monitoring sensor device 1 of the embodiment is wirelessly connected to the base unit 2 of the machine security system by radio waves in this example. And the monitoring sensor apparatus 1 is made into the battery drive type which uses a battery as a power supply.

  Before describing the embodiment of the monitoring sensor device according to the present invention, the basic concept for extending the battery life in this embodiment will be described first with reference to the system diagram of FIG.

  As will be described later, the monitoring sensor device 1 includes a microcomputer, processes the human body detection sensor output from the pyroelectric sensor 1a with the microcomputer, and sends the human body detection information of the processing result to the parent device 2 through the antenna 1AT. .

  In the base unit 2, for example, a user sets a time zone for monitoring (corresponding to security in this example; hereinafter, the term “security”) and a time zone not requiring security are set in advance. And the control part which consists of a microcomputer of the main | base station 2 monitors the time information from a timepiece part, and discriminate | determines whether it is a time zone which should be guarded, and the time zone which is not so, in the time zone which should be guarded. The base unit 2 is set to the security mode, and the base unit 2 is set to the non-security mode in a time zone where no security is required.

  When the control unit of the base unit 2 receives the human body detection information from the monitoring sensor device 1 in the security mode, the control unit 2 emits an alarm sound from the speaker 2SP or causes the light emitter 2L to emit light. Report to a predetermined report destination such as a company through the telephone line 3 or the like. Further, when the control unit of the base unit 2 receives the human body detection information from the monitoring sensor device 1 in the non-guard mode, the control unit ignores the received human body detection information and generates an alarm sound or the light emitter 2L. No light is emitted, and no notification is sent to the contact.

  The main power consumption in the wireless monitoring sensor device 1 is generated when the human body detection information is wirelessly transmitted to the parent device 2 when the human body is detected.

  In the monitoring sensor device 1, while energizing the pyroelectric sensor 1a and waiting for human body detection by the pyroelectric sensor 1a, the monitoring sensor device 1 is in a power saving standby state and consumes about several tens of microamperes. In addition, when the human body detection sensor output from the pyroelectric sensor 1a is received and processed by the microcomputer built in the monitoring sensor device 1, the current consumption is about several milliamperes, and the processing time is within one second.

  Compared to this, when the human body detection information is transmitted from the monitoring sensor device 1 to the parent device 2 wirelessly, the current consumption is tens of milliamperes, which is much larger than the above case. Furthermore, it takes several seconds to perform transmission with high reliability. For this reason, in the monitoring sensor device 1, it is considered effective for power saving to improve the efficiency of transmission of human body detection information to the parent device 2 and to eliminate waste.

  Normally, in an office or the like where machine security is introduced, as described above, a period in which the machine security is implemented (the master unit 2 is in the security mode) and a period in which the machine security is not implemented (the master unit 2 is not guarded). Mode). That is, the office working hours (usually during the day) are periods during which security is not performed, and after the working hours (usually at night) are periods during which security is performed.

  During the period when security is not conducted, employees are working in the office, and there are many people in and out of the room. For this reason, the pyroelectric sensor 1a of the installed monitoring sensor device 1 frequently detects a human body. And if it is the conventional monitoring sensor apparatus, it is comprised so that the human body detection information may be transmitted to the main | base station 2 whenever the pyroelectric sensor 1a detects a human body.

  On the other hand, since the office is unattended during the security implementation period, unless there is a real intruder, there is no human body detection by the pyroelectric sensor 1a, and transmission of human body detection information from the monitoring sensor device 1 to the master unit 2 Will be completely absent. However, periodic transmission for confirming the operation of the monitoring sensor device 1 is performed.

  From the above, from the viewpoint of power consumption of the monitoring sensor device 1, there is a problem that a large amount of power is consumed during a period when security is not required. In order to solve this problem of power consumption, it is only necessary that the monitoring sensor device 1 itself be able to determine whether it is a security implementation period or a security non- implementation period. Consumption can be saved.

  Since the parent device 2 possesses the security execution state information indicating whether it is a security execution period or a security non-operation period, the security execution state information is transmitted from the parent device 2 to the monitoring sensor device 1. To be able to. However, since the monitoring sensor device 1 normally has only a unidirectional communication function for transmitting the human body detection information from the pyroelectric sensor 1a to the parent device 2, the monitoring device 1 sends the monitoring sensor device 1 to the monitoring sensor device 1. The security execution status information cannot be transmitted.

  It is conceivable to increase the number of wireless channels so that the security execution status information can be transmitted from the parent device 2 to the monitoring sensor device 1, but in such a case, the monitoring sensor device 1 always has a parent device. 2 must be ready to receive information from 2. Since the power consumption during reception standby in the monitoring sensor device 1 needs to be about half that during transmission, there is a problem that the power consumption increases due to power consumption during reception standby.

  Therefore, in this embodiment, the monitoring sensor device 1 does not transmit the human body detection information to the parent device 2 every time the human body is detected by the pyroelectric sensor 1a as in the prior art. In the predetermined time period after the human body detection information is transmitted, the human body detection information is not transmitted to the parent device 2 even if the human body is detected by the pyroelectric sensor 1a. The time period during which the human body detection information is not transmitted to the parent device 2 is referred to as a transmission restriction time here.

  That is, the monitoring sensor device 1 of this embodiment is within the transmission restriction time when an output pulse of human body detection is generated from the pulse circuit 19 based on the output of the pyroelectric sensor 1a and an interrupt is input. If it is within the transmission restriction time, transmission is not performed, and after the previous transmission of the human body detection information to the base unit 2, the transmission restriction time has passed and is not within the transmission restriction time. The human body detection information is transmitted to the master unit 2.

  It is conceivable that this transmission restriction time is simply set by the user in a fixed manner. In addition, a method may be conceived in which a plurality of transmission restriction times having different time lengths are prepared in advance in the monitoring sensor device 1 and the user selects from among them.

  In any of these methods, the transmission restriction time in the monitoring sensor device 1 is fixedly set. As the set transmission restriction time is longer, the power consumption can be reduced. However, if an excessively long transmission restriction time, for example, 900 seconds (15 minutes), is set to extend the battery life, even if an intruder is detected in the security enforcement state, the parent of the human body detection information is detected. There is a problem that transmission to the machine 2 is delayed, and it does not function effectively as a security system.

  On the other hand, when a short time such as 10 seconds is set as the transmission restriction time, for example, it is possible to effectively reduce transmission from the monitoring sensor device 1 to the base unit 2 based on frequent human body detection in the security non-execution state. Battery life cannot be extended.

  In the monitoring sensor device 1 of the embodiment described below, the monitoring sensor device 1 itself includes the estimation information acquisition unit so that the situation of the place where the pyroelectric sensor 1a is installed can be estimated. . The monitoring sensor device 1 dynamically changes and controls the transmission restriction time based on the information acquired by the estimation information acquisition unit.

  That is, for example, when it can be estimated from the information acquired from the estimation information acquisition means that the situation of the location where the pyroelectric sensor 1a is installed is a situation where the parent device 2 is in the security mode, the transmission restriction time is set. For example, a short time such as 10 seconds is set.

  Further, when it can be estimated from the information acquired from the estimation information acquisition means that the situation of the place where the pyroelectric sensor 1a is installed is a situation where the parent device 2 is in the non-guard mode, the transmission restriction time is set. For example, a long time such as 900 seconds is set to extend the battery life.

  Next, an embodiment of the monitoring sensor device 1 according to the present invention that realizes the above will be described. In this embodiment, the frequency of human body detection by the pyroelectric sensor 1a is used as one of the estimation information for estimating the situation of the place where the pyroelectric sensor 1a is installed. In this embodiment, the brightness (brightness) of the place where the pyroelectric sensor 1a is installed is used as another one of the estimation information. In this example, it is assumed that the place (room) to be guarded is turned off when the guard is in an implementation state.

  FIG. 1 is a block diagram of a configuration of an embodiment of the monitoring sensor device 1. As shown in FIG. 1, the monitoring sensor device 1 includes a pyroelectric sensor 1a, a light / dark sensor 11, a battery 12, a communication module 13, a transmission restriction time setting unit 14, and a communication unit as main components. A switch circuit 15 for controlling supply of power supply voltage to the module 13, a timer circuit 16, and a control unit 10 including a microprocessor (microcomputer) for controlling the entire apparatus are provided.

  The voltage from the battery 12 is made constant by the constant voltage power supply circuit 17 and then supplied as a power supply voltage to the communication module 13 through the switch circuit 15, as well as the control unit 10, pyroelectric sensor 1 a, light / dark The power is supplied to the sensor 11 and other circuits as its power supply voltage. The switch circuit 15 is controlled to be switched off by the control unit 10 when the transmission restriction time is off and when it is outside the transmission restriction time and transmission to the base unit 2 is required.

  The controller 10 is programmed to enter the sleep state when the initial processing is completed after the power is turned on. In the sleep state, the control unit 10 is switched to a low-speed clock used in the control unit 10, the power supply of unnecessary circuits is cut off, and is in a low power state. Then, the sleep state of the control unit 10 is canceled by an interrupt to the control unit 10, and the control unit 10 is programmed to resume operation immediately.

  The pyroelectric sensor 1a detects a change in infrared rays generated from the human body and generates a human body detection signal. The greater the movement of the human body, the greater the human body detection signal output of the pyroelectric sensor 1a. The human body detection signal from the pyroelectric sensor 1a is amplified by an amplifier 18 and then supplied to a pulse circuit 19 comprising a comparator (comparator). In the pulsing circuit 19, when the human body detection signal from the amplifier 18 becomes equal to or higher than a preset level, an output pulse is output as a human body is detected. The output pulse of the pulsing circuit 19 is supplied to the interrupt input terminal of the control unit 10. Thereby, when a human body is detected by the pyroelectric sensor 1a, a circuit that interrupts the control unit 10 is configured.

  The control unit 10 detects the frequency of human body detection by counting the number of interruptions due to the output pulses of the pulsing circuit 19 per predetermined time. Therefore, the control unit 10 has a function of counting the number of interruptions due to the human body detection output by the pyroelectric sensor 1a and storing it in a memory (detection number counter).

  The predetermined time for detecting the frequency of human body detection is given by the timer circuit 16. In this embodiment, the predetermined time is, for example, 900 seconds (15 minutes). The timer circuit 16 is configured by a so-called RTC (Real Time Clock) circuit, and supplies an interrupt signal generated at the predetermined time for detecting the frequency of human body detection to the interrupt input terminal of the control unit 10. To do. When there is an interrupt input from the timer circuit 16, the control unit 10 acquires the count value of the detection number counter as the number of interruptions of the human body detection signal during the predetermined time, that is, the human body detection frequency, After acquisition, the detection counter is reset.

  As described above, in this embodiment, the pyroelectric sensor 1 a and the control unit 10 constitute one estimation information acquisition unit.

  And in this embodiment, the control part 10 estimates the condition in the monitoring location (location where the pyroelectric sensor 1a is installed) of the monitoring sensor device 1 from the count value of the detection number counter, that is, the human body detection frequency. And based on this estimation, it is estimated whether the main | base station 2 is a guard implementation state. Then, the transmission restriction time is dynamically set according to the count value of the detection number counter, that is, the human body detection frequency.

  In this embodiment, a plurality of transmission restriction time candidates to be set are set in advance by the user through the transmission restriction time setting unit 14. The transmission restriction time setting unit 14 includes, for example, a dip switch. In this example, the transmission restriction time is a value when the base unit 2 is determined to be in the non-guard mode, a value when it is determined as the guard mode, or a value when it is difficult to determine whether it is the non-guard mode or the guard mode. Three values can be set by the user. Instead of being set by the user, those values may be set in the monitoring sensor device 1 in advance. In that case, the transmission restriction time setting unit 14 need not be provided.

  FIG. 3 is a diagram illustrating the relationship between the count value of the detection number counter, the situation determination (estimation) of the monitoring target location where the monitoring sensor device 1 is installed, the estimated security mode of the base unit 2, and the transmission restriction time. It is.

  In the example of FIG. 3, when the count value of the detection number counter is 50 or more, it is determined that the situation of the monitoring target place is a large number of people working, and the estimated security mode of the parent device 2 is the non-guard mode. The transmission restriction time is a long time value set by the transmission restriction time setting unit 14. In this example, the transmission restriction time in the non-guard mode is set to 900 seconds by the transmission restriction time setting unit 14.

  Further, when the count value of the detection number counter is 8 or more and less than 50, the situation of the monitoring target place has been decreased, but it is determined that the office is still in office, and the estimated security mode of the master unit 2 is not set. Security mode is assumed. In this embodiment, the transmission restriction time is also set to 900 seconds at this time.

  Further, when the count value of the detection number counter is 3 or more and less than 8, the situation of the monitoring target place is almost free of people, and it is difficult to determine whether or not the office is in operation. It is set to a time shorter than the time in the non-guard mode set by the regulation time setting unit 14. In this example, the transmission restriction time at this time is set and inputted by the transmission restriction time setting unit 14, for example, 120 seconds.

  Further, when the count value of the detection number counter is 0 or more and less than 3, it is determined that the situation of the monitoring target place is empty and that work is ended, and the transmission restriction time is set by the transmission restriction time setting unit 14. In the security mode, a time that does not hinder the monitoring of a real intruder is set to 10 seconds, for example.

  Each value in the example of FIG. 3 is an example, and the number of transmission restriction times set according to the human body detection frequency is not limited to three, and may be two or four. It may be the above. For example, the transmission restriction time can be made different between the case of 50 or more estimated as the non-guard mode and the case of 8 or more, and when it is 8 or more, it can be set to 300 seconds.

  The light / dark sensor 11 is formed of, for example, a CdS sensor or a photodiode, and an output corresponding to the ambient brightness (lightness) from the light / dark sensor 11 is supplied to the A / D conversion circuit 22 through the amplifier 21 and digitized. , Supplied to the control unit 10.

  The output of the light / dark sensor 11 through the amplifier 21 is also supplied to the pulsing circuit 23. The pulsing circuit 23 includes a comparator circuit, and when the output signal corresponding to the lightness from the amplifier 21 becomes equal to or higher than the level corresponding to the lightness set in advance from a low level, and from the high level, the pre-set When the level falls below the level corresponding to the specified brightness, a pulse is output. The output pulse of the pulsing circuit 23 is supplied to the interrupt input terminal of the control unit 10.

  When there is an interruption due to the output pulse of the pulse circuit 23, the control unit 10 determines the lightness at the time of interruption based on the digitized signal corresponding to the lightness from the A / D conversion circuit 22, Determine whether it is day or night. When it is determined that it is night, the control unit 10 sets the transmission restriction time to the time in the guard mode, in this example, 10 seconds. On the other hand, when it is determined that it is daytime, the control unit 10 does not set the transmission restriction time, but follows the setting of the transmission restriction time according to the human body detection frequency based on the output of the pyroelectric sensor 1a described above.

  In this case, the level corresponding to the preset brightness for generating the interrupt pulse is, for example, the level when the brightness is slightly increased from the darkness to be estimated as the guard mode. In this case, when an interrupt pulse is generated, if the lightness changes from a high level to a low level, the security implementation state (security mode) can be designated.

  Thereby, at night, which is the security implementation state, the control unit 10 is interrupted based on the output of the light / dark sensor 11, and the transmission restriction time can be set to the value in the security implementation state. . From the above, in this embodiment, the light / dark sensor 11 and the control unit 10 also constitute estimation information acquisition means.

  The effect of using the control of changing the transmission restriction time based on the human body detection frequency and the control of the transmission restriction time based on the output of the light / dark sensor 11 is presumed that there was an intruder at night when the movement of the person became intense. Will appear in the situation.

  That is, in the control of the transmission restriction time based only on the human body detection frequency, when there is an intruder and the intruder moves violently or there are multiple intruders, the human body detection frequency of the pyroelectric sensor 1a increases, The regulation time may be changed to that in the non-guard mode, but when it is determined that it is nighttime from the brightness output based on the output of the brightness sensor 11, the transmission regulation time is set in the guard mode. There is an effect that detailed human body detection information can be transmitted without changing with time.

  The communication module 13 is a wireless transmission module used for notifying the base unit 2 of detection events from the monitoring sensor device 1. As described above, the power supply terminal of the communication module 13 is connected to the output terminal of the constant voltage power supply circuit 17 via the switch circuit 15 that is controlled to be turned on and off by the control unit 10. The communication module 13 is energized when the switch circuit 15 is turned on by an instruction from the control unit 10 only when information transmission to the parent device 2 is necessary.

  Next, the operation of the control unit 10 at the time of various interrupts will be described.

[Processing at the time of interruption based on the output of the pyroelectric sensor 1a]
FIG. 4 is a flowchart for explaining the processing of the control unit 10 at the time of interruption based on the output of the pyroelectric sensor 1a.

  First, the control unit 10 determines whether or not the interruption is within the transmission restriction time (step S1). When the control unit 10 determines in step S1 that the transmission restriction time has passed and is outside the transmission restriction time since the previous transmission of the human body detection information to the parent device 2, the switch circuit 15 Is turned on, the power supply voltage is supplied to the communication module 13 (step S2), and the human body detection information is transmitted to the parent device 2 through the communication module 13 (step S3).

  When the transmission to the parent device 2 is completed, the transmission restriction time is reset, and during the transmission restriction time set from the transmission to the parent device 2, no transmission is performed even if a human body detection interrupt occurs. (Step S4). The transmission restriction time set at this time is a time set in a register, for example, as the transmission restriction time during the RTC interruption processing described later.

  Next, the control unit 10 turns off the switch circuit 15 and cuts off the power supply to the communication module 13 (step S5). Next, the value of the detection number counter is incremented by 1 (step S6), and then the control unit 10 returns to the sleep state (step S7) and ends this processing routine.

  If it is determined in step S1 that it is within the transmission restriction time, the control unit 10 increments the detection number counter by 1 (step S6), and then returns to the sleep state (step S7). Exit.

[Processing at the time of interruption based on the output of the light / dark sensor 11]
FIG. 5 is a flowchart for explaining the processing of the control unit 10 at the time of interruption based on the output of the light / dark sensor 11.

  First, the control unit 10 determines the brightness at the time of interruption from the digital signal output from the light / dark sensor 11 at the time of interruption to determine whether it is nighttime or daytime (step S11). When determining that it is nighttime, the control unit 10 sets the light / dark flag to, for example, “0” (step S12), and when determining that it is daytime, sets the light / dark flag to “1” (step S13). When the setting of the brightness / darkness flag is finished, the control unit 10 returns to the sleep state (step S14), and the processing routine is finished.

[Processing at timer interrupt (RTC interrupt)]
FIG. 6 is a flowchart of the processing operation of the control unit 10 at the time of interruption every predetermined time from the timer circuit 16. The example of FIG. 6 is an example in the case where the transmission restriction time is set as in the table shown in FIG. However, in this example, when the count value of the detection number counter indicating the human body detection frequency is 8 or more, unlike the case where the count value is 90 or more, the transmission restriction time is set to 300 seconds.

  First, the control unit 10 determines whether or not the brightness / darkness flag is “0”, that is, whether or not it is nighttime when the parent device 2 is estimated to be in the security mode (step S21). When it is determined in this step S21 that the night is estimated to be the security mode, the control unit 10 sets the set value of the transmission restriction time register to the value in the security mode, in this example, 10 seconds (step S21). S28). Then, the control unit 10 resets the detection number counter to set the count value to “0” (step S29), and then the control unit 10 returns to the sleep state (step S30) and ends this processing routine. .

  When it is determined in step S21 that the brightness flag is not “0” but “1”, the control unit 10 refers to the count value of the detection number counter indicating the human body detection frequency, and first, the count value is 90. It is determined whether or not the above is true (step S22). When it is determined in step S22 that the count value is 90 or more, the control unit 10 sets 900 seconds as the transmission restriction time in the transmission restriction time register (step S23). Then, the control unit 10 proceeds to step S29, resets the detection number counter for counting the human body detection frequency, sets the count value to [0], and then returns to the sleep state (step S30). Exit.

  Further, when it is determined in step S22 that the count value of the detection number counter is not 90 or more, the control unit 10 determines whether or not the count value of the detection number counter is 8 or more (step S24). When it is determined in step S24 that the count value is 8 or more, the control unit 10 sets 300 seconds as the transmission restriction time in the transmission restriction time register (step S25). Then, the control unit 10 proceeds to step S29, resets the detection number counter for counting the human body detection frequency, sets the count value to [0], and then returns to the sleep state (step S30). Exit.

  If it is determined in step S24 that the count value of the detection number counter is not 8 or more, the control unit 10 determines whether or not the count value of the detection number counter is 3 or more (step S26). When it is determined in step S26 that the count value is 3 or more, the control unit 10 sets 120 seconds as the transmission restriction time in the transmission restriction time register (step S27). Then, the control unit 10 proceeds to step S29, resets the detection number counter for counting the human body detection frequency, sets the count value to [0], and then returns to the sleep state (step S30). Exit.

  If it is determined in step S24 that the count value of the detection number counter is not 3 or more, the control unit 10 sets 10 seconds as the transmission restriction time in the transmission restriction time register (step S28). Then, the control unit 10 proceeds to step S29, resets the detection number counter for counting the human body detection frequency, sets the count value to [0], and then returns to the sleep state (step S30). Exit.

  As described above, in this embodiment, the monitoring sensor device 1 itself estimates the situation of the place where the monitoring sensor device 1 is installed based on the human body detection frequency and brightness, and based on this estimation, It is possible to determine (estimate) the security implementation status of whether the base unit 2 is in the security implementation state or the security non-execution state. The monitoring sensor device 1 dynamically changes and controls the transmission restriction time according to the human body detection frequency and brightness based on the fact that the security implementation status of the parent device 2 can be determined.

  Thereby, when the main | base station 2 is a guard non-execution state (non-security mode), transmission control time can be lengthened, transmission of useless human body detection information can be reduced, and battery life can be lengthened. . Further, when the parent device 2 is in the security implementation state (security mode), the transmission restriction time can be set to a short time such as 10 seconds suitable for security, for example. Can be sent to.

  In the above embodiment, the human body detection frequency and the brightness of the place where the monitoring sensor device 1 is installed are used together as estimation information, but only one of them is used as estimation information. The transmission restriction time may be changed and controlled.

  Further, the estimation information is not limited to the human body detection frequency or the brightness of the place where the monitoring sensor device 1 is installed. For example, when music is played during work, and the work is terminated and put into a guarded state, in a quiet environment, the monitoring sensor device 1 is monitored by monitoring the surrounding sounds where the monitoring sensor device 1 is installed. Since it is possible to estimate the security mode of the parent device according to the situation of the place where it is installed, it is possible to change and control the transmission restriction time based on the sound information. It is of course possible to change and control the transmission restriction time by combining the human body detection frequency and brightness and sound.

  In the above description of the embodiment, the monitoring sensor device is configured to be connected to the parent device wirelessly. However, the monitoring sensor device is connected to the parent device via a connection line to communicate human body detection information. Of course, the present invention can be applied if the monitoring sensor device is battery driven.

1 is a block diagram of an embodiment of a monitoring sensor device according to the present invention. It is a block diagram which shows the structural example of the machine security system using a monitoring sensor apparatus. It is a figure used in order to demonstrate the principal part of embodiment of the monitoring sensor apparatus by this invention. It is a flowchart for demonstrating operation | movement of embodiment of the monitoring sensor apparatus by this invention. It is a flowchart for demonstrating operation | movement of embodiment of the monitoring sensor apparatus by this invention. It is a flowchart for demonstrating operation | movement of embodiment of the monitoring sensor apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Monitoring sensor apparatus 2 Parent | base station 10 Control part 1a Pyroelectric sensor 11 Light / dark sensor 12 Battery 13 Communication module 15 Switch circuit for power supply control

Claims (5)

In a monitoring sensor device comprising a human body detection sensor, driven by a battery, and configured to transmit information based on human body detection in the human body detection sensor to a parent device,
Transmitting means for transmitting information based on the human body detection to the master unit;
In the set transmission restriction time, transmission control means for controlling to stop transmitting information based on the human body detection to the master unit;
An information acquisition means for estimation for acquiring information for estimating the security mode of the parent machine according to the situation of the place where the human body detection sensor is installed;
Transmission restriction time control means for setting and controlling the length of the transmission restriction time based on information from the estimation information acquisition means;
A monitoring sensor device comprising: The monitoring sensor device according to claim 1,
The estimation information acquisition means acquires the frequency of the human body detection by the human body detection sensor as information for estimating a security mode of the parent device according to a situation of a place where the human body detection sensor is installed. And
The transmission control time control means controls the length of the transmission control time based on the frequency of the human body detection. The monitoring sensor device according to claim 2,
The transmission restriction time control means is configured to control the transmission restriction according to the human body detection frequency from a plurality of lengths of the transmission restriction times set in advance according to the human body detection frequency by the human body detection sensor. A monitoring sensor device characterized by determining a length of time. The monitoring sensor device according to claim 1,
With a light / dark sensor,
The estimation information acquisition means acquires the brightness detected by the brightness sensor as information for estimating the security mode of the parent machine according to the situation of the place where the human body detection sensor is installed,
The transmission control time control means controls the length of the transmission control time based on the lightness detected by the light and dark sensor. The monitoring sensor device according to claim 2,
With a light / dark sensor,
The estimation information acquisition means determines the frequency of the human body detection by the human body detection sensor and the brightness of the brightness sensor according to the situation of the location where the human body detection sensor is installed. Obtained as information for estimation,
The transmission control time control means controls the length of the transmission control time based on the frequency of the human body detection and the brightness detected by the brightness sensor.

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