JP2010129005A - Window opening/closing detecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect window opening and closing with different sensitivity if necessary. <P>SOLUTION: A magnetic force level by a window opening/closing detecting magnet 46 disposed on the window side is detected by a window opening/closing detecting Hall sensor 50 to determine window opening/closing. A threshold setting section 75 sets an open determination threshold TH1 for determining opening of the window, and a closed determination threshold TH2 for determining closing of the window, to different values. A window opening/closing monitoring section 76 carries out determination processing at every predetermined time. When the preceding determined result is open determination, the window opening/closing monitoring section 76 selects the closed determination threshold TH2 and compares it with the magnetic force level detected by the window opening/closing detecting Hall sensor 50, and when the preceding determined result is closed determination, the window opening/closing monitoring section 76 selects the open determination threshold TH1 and compares it with the magnetic force level. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a window opening / closing detection device that detects the opening / closing state of a window using a magnetic detection element such as a hall sensor.

  2. Description of the Related Art Conventionally, a wireless window opening / closing monitoring device that detects opening / closing of a window and transmits the alarm to a monitoring panel wirelessly is known. In such a window open / close monitoring device, the magnetic detection element detects the magnetic force of the magnet placed on the window glass, and when the detected magnetic force decreases, it is determined that the window is open / closed and an abnormality detection signal is transmitted to the monitoring panel wirelessly. Alarm. Also, the magnetic force of the magnet placed on the open / close lever of the crescent lock provided on the window is detected by another magnetic detection element, and when the detected magnetic force decreases, the crescent lock is judged to be open and an abnormality detection signal is transmitted wirelessly to the monitoring panel. Alarm.

  The magnetic sensing elements used in conventional window opening and closing devices mainly use reed switches that mechanically turn contacts on and off according to the strength of the magnetic force, but in recent years, the Hall effect has been used. The adoption of Hall sensors that detect the magnetic force is being studied.

  When the Hall sensor is used as a magnetic sensing element, the closer to the magnet to be detected, the stronger the magnetic force that passes through the Hall sensor, the higher the sensor output. The window open / close detection based on the magnetic level detected by the hall sensor is performed by setting a low value obtained by multiplying the maximum value of the magnetic level detected with the window closed by a predetermined rate as a determination threshold, and during monitoring. When the detected magnetic level falls below the determination threshold value, it is determined that the window is open, and a message indicating that the window is open is transmitted to the monitoring panel for alarming.

When the magnetic level increases and exceeds the determination threshold after determining the opening of the window, it is determined that the window is closed and a message indicating that the window is closed is wirelessly transmitted to the monitoring panel to display the state.

JP 2003-281636 A Japanese Patent Laid-Open No. 2001-14990

  However, in the window opening / closing detection device that determines whether the window is open or closed by comparing the magnetic level detected by the conventional Hall sensor with a predetermined determination threshold, the same determination is made for the opening / closing determination of the window. Since the threshold value is used, there is a problem that it is not possible to cope with a usage method in which it is desired to increase detection sensitivity for detection of window opening by an intruder and to lower detection sensitivity for detection of window closing.

  If the same threshold value is used to determine whether the window is open or closed, the magnetic force level in the window closed state will decrease due to some factors such as aging of the magnet and circuit that were not expected at the time of installation and changes in the temperature environment. When the window is swayed by wind or the like in such a state, a change in which the magnetic force level falls below or exceeds the determination threshold may occur, and there is a risk of erroneous opening / closing detection of the window.

It is an object of the present invention to provide a window opening / closing detection device that can detect window opening and window closing with different sensitivities as necessary.

The present invention relates to a window opening / closing detection device for monitoring the opening / closing state of a window.
A magnetic sensing element for detecting a magnetic force level by a magnet disposed on a monitoring target;
A threshold setting unit for setting an open determination threshold for determining whether the monitoring target is open and a close determination threshold for determining whether the monitoring target is closed;
A window open / close monitoring unit that determines whether the monitoring target is open or closed by comparing the detection level detected by the magnetic detection element with the open determination threshold value or the close determination threshold value;
It is provided with.

  Here, the window opening / closing monitoring unit executes a determination process every predetermined time, and when the previous determination result is the close determination, the open determination threshold is selected and compared with the magnetic force level, and the magnetic force level is equal to or less than the open determination threshold. In this case, the monitoring target is determined to be open, and if the previous determination result is an open determination, the close determination threshold is selected and compared with the magnetic force level. If the magnetic force level is equal to or greater than the close determination threshold, the monitoring target is determined to be closed. To do.

  In contrast, the threshold setting unit may set the closing determination threshold to a larger value than the opening determination threshold. This means that the sensitivity of open determination is low and the sensitivity of close determination is high.

The magnetic sensing element is a Hall sensor.

  According to the present invention, by setting separately the open determination threshold and the close determination threshold having different values as the determination value to be compared with the magnetic force level by the magnet provided on the monitoring target such as the window detected by the magnetic detection element, for example, By setting a closing judgment value that is larger than the closing judgment value, the detection sensitivity of window opening is increased, and a window opening is judged at an early stage when a window in the closed state starts to open and an alarm is issued. Can do.

In addition, when an open determination value that is larger than the close determination value is set, the detection sensitivity of window opening is reduced, and it is prevented that the window opening is detected by mistake due to wind movement. it can.

  FIG. 1 is an explanatory view showing an installation state of a window opening / closing detection device according to the present invention. In FIG. 1, a window opening / closing detection device 10 of the present invention is fixed to a vertical frame of window sashes 12a and 12b to be monitored by double-sided tape or screws. On the upper side of the window opening / closing detection device 10, the window sash 12a, 12b is closed, and a window opening / closing detection magnet 14 is affixed to the opposite position with double-sided tape. It is detected by a hall sensor as a detection element.

  When the window sash 12a, 12b is opened, the magnetic force is reduced by the window opening / closing detection magnet 14 being separated from the window opening / closing detection device 10, and a detection signal indicating the opening of the window is detected by detecting the decrease in the magnetic force with a hall sensor. Sent to the monitoring panel by radio to alert.

  The window opening / closing detection device 10 is arranged so that the lower end thereof is close to the crescent lock 16 as the monitoring object provided on the window sashes 12a, 12b, and the crescent lock detection magnet attached to the opening / closing lever 18 of the crescent lock 16. The magnetic force of 20 is detected by a hall sensor built in the lower end side.

  The crescent lock 16 locks the window sashes 12a and 12b at an operation position in which the opening / closing lever 18 is rotated in the illustrated vertical direction. At this time, the crescent lock detection magnet 20 is the hall sensor closest to the window opening / closing detection device 10. The magnetic force to be detected is maximized, and the locked state is detected.

  When the crescent lock 16 is unlocked by turning the opening / closing lever 18 downward, the magnetic force is reduced by the separation of the crescent lock detection magnet 20, and a detection signal indicating the unlocked state is detected by detecting the decrease in the magnetic force with a hall sensor. Sends a warning to the monitoring device by radio.

  FIG. 2 is an exploded view showing an embodiment of the window opening / closing detection apparatus according to the present invention. In FIG. 2, the window opening / closing detection device 10 of the present embodiment includes an apparatus main body 22 and a cover member 24.

  The apparatus main body 22 is assembled from the bottom side, a base 30, a metal plate lock cover 32, a body case 36, a circuit board 38 including an antenna 40, and a main body cover 42, and a battery 44 is detachably provided. A conical magnetic current collector 26 is housed and fixed in the holder member 28 at an end portion of the cover member 24 located on the crescent lock side.

  A sensor board 45 is erected on the upper side of the circuit board 38, and the window opening / closing detection hall sensor 46 and the processing circuit section are mounted thereon. A crescent lock locking detection hall element 48 is installed at the lower end of the circuit board 38.

  FIG. 3 is an explanatory view showing a state where the cover member 24 is removed from the apparatus main body 22 in the window opening / closing detection apparatus 10 according to the present embodiment. On the upper part of the apparatus main body 22, a display unit 56 using red and green two-color LEDs, a registration switch 60 that executes a threshold value registration process for determining the magnetic force detected by the lock detection hall sensor 48, and a cover member A tamper switch 64 for detecting attachment / detachment of 24 is provided. The apparatus main body 22 is fitted and fixed in response to the fitting of the cover member 24.

  The cover member 24 is detachable from the apparatus main body 22, and a display window 57 is provided in the center of the front so that the display state of the display unit 56 of the apparatus main body 22 can be seen.

  FIG. 4 is a block diagram showing a circuit configuration of the window opening / closing detection apparatus according to the present embodiment. In FIG. 4, a processor 50 provided as a control unit is a computer known as a one-chip microcomputer, and includes a CPU, a ROM, a RAM, an AD conversion port, various input / output ports, etc. on one chip. In the embodiment, a nonvolatile memory 68 such as an EEPROM is externally attached.

  For the processor 50, the magnetic force level detection signal from the window opening / closing detection magnet 14 provided on the window glass detected by the window opening / closing detection hall sensor 46 is amplified by the amplifier 52 and then applied to the AD conversion port 70 for digital conversion. The magnetic force level (AD conversion value) is obtained.

  Further, the magnetic force level detection signal detected by the lock detection hall sensor 48 by the crescent lock detection magnet 20 provided on the open / close lever 18 of the crescent lock 16 is amplified by the amplifier 54 and then applied to the AD conversion port 72 for digital conversion. The magnetic force level (AD conversion value) is obtained.

  A display unit 56, a frequency switch 58, a registration switch 60, a test switch 62, a tamper switch 64, and a wireless transmission unit 66 are provided for the processor 50.

  The display unit 56 is provided with green and red two-color LEDs. For example, the red LED is turned on when an abnormality is detected such as opening of a window or unlocking, and the green LED is turned on when the normal operation is subsequently restored. The frequency switch 58 selects any one of a plurality of usable channels prepared in advance for the wireless transmission unit 66.

  The registration switch 60 is used for setting a registration mode that is performed at the start of use of the window opening / closing detection device 10 of the present embodiment. A reed switch is used as the test switch 62. When the test magnet is brought close to the test switch 62, the test switch 62 operates to transmit a test message from the wireless transmission unit 66 to the monitoring board. The tamper switch 64 is a switch that detects attachment / detachment of the cover member 24.

  The wireless transmission unit 66 is provided with a transmission circuit, and performs wireless communication of the monitoring state to the monitoring device.

  In the nonvolatile memory 68, an open determination threshold value TH1 and a close determination threshold value TH2 of the apparatus are stored in advance.

  The processor 50 is provided with a registration processing unit 74, a threshold setting unit 75, a window opening / closing monitoring unit 76, a lock monitoring unit 78, and a communication control unit 80 as functions realized by execution of a program by the CPU.

  As shown in FIG. 1, the registration processing unit 74 operates the open / close lever 18 of the crescent lock 16 to the unlocked position after the installation of the window open / close detection device 10, the window open / close detection magnet 14 and the crescent lock detection magnet 20 is completed. In this state, when the cover member 24 is removed and the registration switch 60 of the apparatus main body 22 is operated as shown in FIG. 3, the registration mode is set and the registration process is executed.

  When the registration mode is started, the red LED of the display unit 56 starts blinking. While the red LED is blinking, the open / close lever 18 of the crescent lock 16 is operated to the locked position to bring the crescent lock detection magnet 20 closer, and the cover member 24 is attached to the apparatus main body 22.

  During the registration mode operation, the registration processing unit 74 acquires the magnetic force level detected by the lock detection hall sensor 48, compares it with a predetermined effective level set in advance, and if it exceeds the effective level, the non-volatile memory 68 is stored as a magnetic force level. The magnetic force level for the second and subsequent times is overwritten with the magnetic force level of the nonvolatile memory 68.

  When the magnetic force level is effectively initially registered in the nonvolatile memory 68, the green LED of the display unit 56 is turned on to notify the completion of the initial registration. When the initial registration is completed, the registration processing unit 74 calculates a value obtained by multiplying the initially registered magnetic force level Vs by a predetermined ratio, registers the value in the nonvolatile memory 68 as a determination threshold value for determining whether the crescent lock is unlocked, and monitors the locking. The lock monitoring of the crescent lock by the unit 78 is started.

  On the other hand, if the operation of setting the open / close lever 18 of the crescent lock 16 to the locked position is not performed within a predetermined time after setting the registration mode by operating the registration switch 60, a magnetic force level exceeding the effective level is obtained. Therefore, when the initial registration of the magnetic force level is not completed and the predetermined time has elapsed, the red LED switches from blinking to lighting, displays the failure of initial registration, sets the error status of the registration process, and locks The monitoring monitoring of the crescent lock by the monitoring processing unit 78 is canceled.

  In this case, the magnetic force level can be registered again by returning the opening / closing lever 18 to the unlocked position and operating the registration switch 60.

  The threshold setting unit 75 sets a threshold for determining opening / closing of the window based on the magnetic level detected by the window opening / closing detection hall sensor 46, and the window opening / closing at a position away from the apparatus side face by a predetermined distance. The magnetic level of the detection magnet 14 is measured as a span level and stored in the nonvolatile memory 68. Further, the magnetic level in a state where the window without the window open / close detection magnet 14 is opened and there is no magnetic force is measured, and this is stored in the nonvolatile memory 68 as a zero point level.

  The determination threshold is set by subtracting the zero point level from the span level to obtain a change amount, calculating a low value obtained by multiplying the change amount by a predetermined ratio, and adding a zero point level thereto as a reference determination threshold value TH. Store in the nonvolatile memory 68.

Further, the open determination threshold value TH1 and the close determination threshold value TH2 are determined based on the reference determination threshold value TH and set in the nonvolatile memory 68. For example, when the reference determination threshold TH is used as the open determination threshold TH1 (TH1 = TH), the close determination threshold TH2 is obtained by adding or subtracting a predetermined change amount ΔTH,
TH2 = TH + ΔTH
Or
TH2 = TH-ΔTH
Determine as.

The magnitude relationship between the open determination threshold value TH1 and the close determination threshold value TH2 is set as appropriate according to the necessity of increasing the sensitivity of open detection or increasing the sensitivity of close detection. For example, if you want to increase the sensitivity of open detection,
TH1> TH2
Set to be. This setting means that the close detection sensitivity is increased at the same time.

Conversely, if you want to lower the sensitivity of open detection,
TH1 <TH2
Set to be. This setting means that the sensitivity of closed detection is lowered at the same time.

  Here, since the Crescent lock 16 has various structures and shapes depending on the installation location, registration processing at the installation location is required. However, for window opening / closing detection, the installation location such as the structure and dimensions of the window frame is required. Since the situation can be assumed almost before installation, registration may be performed at the factory shipment stage. That is, at the factory shipment stage, the window opening / closing detection magnet 14 is arranged at a position separated from the apparatus side by an assumed distance between the apparatus assumed in the actual installation situation and the window opening / closing detection magnet 14, and the magnetic force level at that time is spanned. The level is measured and stored in the nonvolatile memory 68. Then, the above-described thresholds TH1 and TH2 may be determined.

  The window opening / closing monitoring unit 76 compares the magnetic force level obtained from the window opening / closing detection hall sensor 46 with the opening determination threshold value TH1 or the closing determination threshold value TH2 read from the nonvolatile memory 68, and determines whether the window is open or closed. Is transmitted from the wireless transmission unit 66 to the monitoring panel, and an alarm or an alarm release is performed.

  That is, the window open / close monitoring unit 76 executes a determination process at predetermined time intervals by a timer interrupt. If the previous determination result is a close determination, the window open / close monitoring unit 76 selects the open determination threshold TH1 and compares it with the magnetic force level. Is determined to be open when the threshold is less than or equal to the opening determination threshold TH1. On the other hand, when the previous determination result is open determination, the close determination threshold value TH2 is selected and compared with the magnetic force level, and when the magnetic force level is equal to or higher than the close determination threshold value TH2, the window closing is determined.

  Furthermore, the window open / close monitoring unit 76 approaches the so-called fraudulent act of opening a window so that the magnetic force level does not fall below a threshold value by bringing a strong magnet close to the outside. On the other hand, a message indicating that the window is opened is transmitted even when a threshold value exceeding a predetermined ratio is exceeded. Further, an appropriate range of the magnetic force level in the normal use state may be set based on the span level and the zero point level, and it may be determined that an illegal act has occurred when the magnetic force level deviates from the appropriate range. In other words, the upper limit value is set to a value that is higher by a predetermined ratio than the span level when the window is closed, the lower limit value is set to a value that is lower by a predetermined ratio than the zero point level when the door is opened, and the magnetic force level is within the appropriate range. This may be detected to determine fraud.

  The lock monitoring unit 78 compares the magnetic force level obtained from the lock detection hall sensor 48 with the threshold value set by the registration processing unit 74, and when it is equal to or less than the threshold value, it is determined that the crescent lock is unlocked and indicates unlocking. An electronic message is transmitted from the wireless transmission unit 66 to the monitoring panel to give an alarm. Further, the lock monitoring unit 78 wirelessly transmits a message to that effect to the monitoring panel even when it returns to normal after detecting unlocking.

  In addition to the transmission of the message based on the determinations of the open / close monitoring unit 76 and the lock monitoring unit 78, the communication control unit 80 transmits a regular notification message at regular time intervals.

  FIG. 5 is an explanatory diagram showing the relationship between the Hall sensor and the magnet in the installed state of FIG. 1, in which FIG. 5 (A) shows a plan view and FIG. 5 (B) shows a state seen from the lateral direction.

  As shown in FIG. 5 (A), the window opening / closing detection device 10 of this embodiment is attached to the vertical frame of the window sash 12a located inside by double-sided tape or screws, and is opposed to the right side surface of the window opening / closing detection device 10. The window opening / closing detection magnet 14 is adhered to the glass surface of the window sash 12b with double-sided tape.

  As shown in FIG. 5B, the window opening / closing detection hall sensor 46 built in the window opening / closing detection device 10 is mounted on the sensor substrate 45 so that the effective detection surface faces the window opening / closing detection magnet 14. When the window sashes 12a and 12b are closed, the distance d from the side of the device is minimum, and the window opening / closing detection magnet 14 outputs a magnetic level detection signal that is maximum with a positive polarity, for example, according to the direction of the magnetic force lines indicated by broken lines. Output.

  The minimum distance d when the window is closed varies depending on the structure of the window sash and the attachment state of the window opening / closing detection device 10, but in the present embodiment, the window is at a magnetic force level when it is disposed at a distance within a specified range. The amplification factor and determination threshold value by the amplifier 52 are set so that the closed determination result can be obtained efficiently.

  FIG. 6 is an explanatory view showing the relationship between the hall sensor and the magnet in the installation state in which the opening and closing of the window is reversed with respect to FIG. In this case, as shown in FIG. 6A, the window sash 12b is on the inside, and the window opening / closing detection device 10 is installed in the vertical frame in the opposite direction to FIG.

  For this reason, in the state seen from the horizontal direction of FIG. 6B, the magnetic field lines indicated by broken lines by the window opening / closing detection magnet 14 attached to the glass surface of the window sash 12a pass through the window opening / closing detection hall sensor 46 from left to right. However, since the direction is opposite to that in the case of FIG. 5B, the magnetic force level detection signal having a reverse polarity is output from the window opening / closing detection hall sensor 46.

  FIG. 7 is a graph showing the AD conversion characteristics of the magnetic level detection signal by the AD conversion port 70 of FIG. The window opening / closing detection hall sensor 46 shown in FIG. 4 outputs a positive polarity magnetic level detection signal and a negative polarity magnetic level detection signal according to the direction of passage of the magnetic lines of force.

  The magnetic level detection signal from the window opening / closing detection hall sensor 46 is amplified by an amplifier 52. The magnetic force level detection signal (voltage signal) amplified by the amplifier 52 is converted into, for example, 8-bit magnetic force level data (AD converted value) by the AD conversion port 70.

  The AD conversion port 70 has a conversion characteristic having a value of 0 to 256 as a decimal AD conversion value as shown by the vertical axis in FIG. 7, and an input positive magnetic level detection signal 0 to + Vmax is converted into an AD conversion value. Conversion to 128 to 256, and the input negative magnetic level detection signals 0 to -Vmax are converted to AD conversion values 128 to 0.

  FIG. 8 is a graph showing the relationship of the magnetic force level detected by the window opening / closing detection hall sensor 46 with respect to the distance d from the device side surface to the window opening / closing detection magnet 14 in this embodiment. Note that the actual conversion characteristics of the AD conversion port 70 are as shown in FIG. 7, but in FIG. 8, the AD conversion value is set to 0 regardless of the polarity of the magnetization level detection signal in order to simplify the description. ~ 128.

  The characteristic of FIG. 8 shows the AD conversion value corresponding to the magnetic force level measured by changing the distance d from the side of the apparatus to the window opening / closing detection magnet 14 in the range of d = 0 to 24 mm in the installation state of FIG. ing.

  In such characteristics, for example, if a magnet arrangement with d = 20 mm is planned, a magnetic force level Vs corresponding to the point P at this time is obtained. This magnetic force level Vs is the maximum level in this installation state and gives a so-called span level.

  The magnetic force level Vs that gives the span level includes an offset due to variations in the Hall sensor. Therefore, the magnetic force level when there is no magnetic force is measured as the zero point level V0.

  A value obtained by subtracting the zero point level from the magnetic force level from the window opening / closing detection hall sensor 46 that detects the magnetic force of the window opening / closing detection magnet 14 indicates the true magnetic force level. Therefore, the magnetic force level Vs at d = 20 mm is also calibrated as (Vs−V0), and a value lower by a predetermined ratio α is set as the reference determination threshold value TH.

That is, the reference determination threshold TH is TH = (1−α) (Vs−V0) + V0.
As determined.

If the reference determination threshold value can be determined in this way, for example, as described above, the open determination threshold value TH1 = TH, and the close determination threshold value TH2 is obtained by adding or subtracting a predetermined change amount ΔTH,
TH2 = TH + ΔTH
Or
TH2 = TH-ΔTH
Determine as.

  FIG. 9 is an explanatory diagram showing open / close determination when the open determination threshold TH1 is set to a high value and the close determination threshold TH2 is set to a low value.

  FIG. 9A shows AD conversion values that have a range of 0 to 128, and the open determination threshold value TH1 is set as a value that is lower than the magnetic force level Vs in the window closed state by a predetermined ratio α, which is lower than that. The closing determination threshold value TH2 is set as the value.

  FIG. 9B shows open determination. If the previous magnetic force level exceeds TH2 and the window is in the closed state, the open determination threshold TH1 is selected in this case and compared with the magnetic force level acquired at the present time. judge.

  FIG. 9C shows the closing determination. Assuming that the previous magnetic force level is equal to or lower than TH1 and the window is open, the closing determination threshold TH2 is selected in this case, and compared with the magnetic force level acquired at the present time. judge.

  In this case, since the opening determination threshold value TH1 is high, the opening of the window is determined earlier with respect to the movement in the opening direction of the window, and the detection sensitivity of the opening of the window can be increased. Moreover, since the closing determination threshold value TH2 is low, the closing of the window is determined early with respect to the movement in the closing direction of the window, and the detection sensitivity of the window closing can be increased.

  FIG. 10 is an explanatory diagram showing open / close determination when the open determination threshold TH1 is set to a low value and the close determination threshold TH2 is set to a high value.

  FIG. 10A shows AD conversion values, which have a range of 0 to 128, and the open determination threshold value TH1 is set as a value lower than the magnetic force level Vs in the window closed state by a predetermined ratio α, which is higher than that. The closing determination threshold value TH2 is set as the value.

  FIG. 10B shows open determination. If the previous magnetic force level exceeds TH2 and the window is in the closed state, the open determination threshold TH1 is selected in this case and compared with the magnetic force level acquired at the present time. judge.

  FIG. 10C shows the closing determination. Assuming that the previous magnetic force level is equal to or lower than TH1 and the window is open, the closing determination threshold TH2 is selected in this case, and compared with the magnetic force level acquired at the present time. judge.

  In this case, since the opening determination threshold value TH1 is low, the opening of the window is determined late with respect to the movement in the opening direction of the window, the detection sensitivity of the opening of the window is lowered, and the closed window is opened or closed in the opening / closing direction due to wind or the like Suppressing false detection of opening / closing of the magnetic field level when the distance d from the side of the device to the window opening / closing detection magnet 14 changes by moving the windows closer to or away from each other rather than moving. can do. Further, since the closing determination threshold value TH2 is high, the closing of the window is determined late with respect to the movement in the closing direction of the window, the detection sensitivity of the closing of the window can be lowered, and it can be detected that the window has been closed to the end.

  FIG. 11 is a flowchart showing the window opening / closing detection process of the present embodiment by the processor of FIG.

  In FIG. 11, when the battery 44 is attached and the power is turned on, the initialization process and the self-diagnosis process are executed in step S1. If there is no abnormality, the process proceeds to step S2, and the open determination threshold value stored in the nonvolatile memory 68 is obtained. Data including TH1 and the closing determination threshold TH2 is read.

  Subsequently, the process proceeds to step S3, where it is determined whether or not the registration mode is selected. If it is the registration mode, the process proceeds to step S3, and registration including threshold setting for detection of opening and closing of the crescent lock 16 based on the magnetic force level by the lock detection hall sensor 48 Execute the process. As described above, the registration mode is started by operating the registration switch 60 with the cover member 24 removed as shown in FIG.

  Subsequently, in step S6, it is determined whether or not a predetermined monitoring cycle has been reached. If it is determined that the monitoring cycle has been reached, low battery monitoring processing for the battery 44 is executed in step S6. At this time, if the battery voltage drops below a specified voltage, a message indicating a low battery is wirelessly transmitted to the monitoring panel to display a failure.

  Next, in step S7, a window opening / closing monitoring process is executed, and when a window opening or window closing is determined, a message indicating the contents is transmitted to the monitoring board. In step S8, a lock monitoring process is executed, and when unlocking or subsequent locking is determined, a message indicating the contents is transmitted to the monitoring board. Subsequently, in step S9, it is determined whether the regular notification time has elapsed, and if it is determined that the process has elapsed, the process proceeds to step S10, where a periodic notification process for transmitting a periodic notification message to the monitoring panel is performed.

  FIG. 12 is a flowchart showing details of the window opening / closing monitoring process in step S7 of FIG. In FIG. 12, first, in step S11, the magnetic force level by the window opening / closing detection hall sensor 46 is acquired, and in step S12, it is checked whether or not the previous determination is a closing.

  If the previous determination was a close determination, the process proceeds to step S13, where the open determination threshold TH1 is selected, and in step S14, it is determined whether the magnetic force level is equal to or less than the open determination threshold TH1. When the magnetic force level is equal to or lower than the open determination threshold TH1, the process proceeds to step S15 to determine whether the window is open, and in step S16, an open determination message is transmitted to the monitoring device to perform an alarm operation.

  On the other hand, if the previous determination was an open determination in step S12, the process proceeds to step S17, where the close determination threshold TH2 is selected, and in step S18, it is determined whether the magnetic force level is equal to or greater than the close determination threshold TH2. When the magnetic force level is equal to or higher than the open determination threshold TH2, the process proceeds to step S19 to determine whether the window is closed, and in step S20, a close determination message is transmitted to the monitoring device to perform an alarm release operation.

  In the above-described embodiment, the unlocking and locking of the crescent lock are detected, but the present invention can also be applied to a window opening / closing detection device that detects only window opening / closing.

  Moreover, how to determine the open determination threshold value TH1 and the close determination threshold value TH2 is not limited to the above-described embodiment, and can be determined as a different threshold value by an appropriate method.

  In the above embodiment, the determination threshold value for opening / closing the window is taken as an example. However, the open / close state of the crescent lock is monitored, and the unlock determination threshold value is similarly applied to the unlocking / locking monitoring of the crescent lock. The locking determination threshold value may be set to a different value to determine unlocking and locking.

  Further, the magnetic force level used for comparison with each threshold value may not be simply compared with a single magnetic force level, but may be an average value of a plurality of magnetic force levels and compared with the threshold value. Thereby, even when the magnetic force level largely fluctuates in the short term due to vibration of the door due to wind or the like, it is possible to prevent erroneous determination that the door is open. In addition, when the vicinity of the determination threshold fluctuates up and down within a predetermined short time, the determination of opening / closing is suspended, and when the threshold is exceeded for a predetermined time or longer, the determination of opening / closing is performed, and the status signal is transmitted wirelessly. You may make it communicate.

  Further, it may be possible to arbitrarily switch and set which of the open determination threshold value TH1 and the close determination threshold value TH2, that is, which mode of FIGS. 9 and 10 is adopted.

Further, the present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Explanatory drawing which showed the installation state of the window opening / closing detection apparatus by this invention Assembly exploded view showing an embodiment of a window opening and closing detection device according to the present invention Explanatory drawing which showed the state which removed the cover member from the apparatus main body about the window opening / closing detection apparatus by this embodiment The block diagram which showed the circuit structure of the window opening / closing detection apparatus by this embodiment Explanatory drawing which showed the relationship between a hall sensor and a magnet in the installation state of FIG. Explanatory drawing which showed the relationship between a hall sensor and a magnet in the installation state in which the opening and closing of the window was reversed with respect to FIG. The graph which showed the AD conversion characteristic of the magnetic level detection signal by the AD conversion port of FIG. The graph which showed the relationship of the magnetic force level detected with the Hall sensor with respect to the distance from the apparatus side surface to a magnet in this embodiment Explanatory drawing which showed the opening-and-closing determination at the time of setting the opening determination threshold value TH1 to a high value and setting the closing determination threshold value TH2 to a low value Explanatory drawing which showed the opening-and-closing determination at the time of setting the opening determination threshold value TH1 to a low value and setting the closing determination threshold value TH2 to a high value The flowchart which showed the window opening / closing detection process of this embodiment by the processor of FIG. The flowchart which showed the detail of the window opening / closing monitoring process in step S7 of FIG.

Explanation of symbols

10: Window open / close detection devices 12a, 12b: Window sash 14: Window open / close detection magnet 16: Crescent lock 18: Open / close lever 20: Crescent lock detection magnet 22: Device main body 24: Cover member 46: Window open / close detection hall sensor 48: Lock detection hall sensor 60: Registration switch 74: Registration processing unit 75: Threshold setting unit 76: Opening / closing monitoring unit 78: Locking monitoring unit 80: Communication control unit

Claims (5)

In a window open / close detection device that monitors the open / close state of a window,
A magnetic sensing element for detecting a magnetic force level by a magnet disposed on a monitoring target;
A threshold setting unit for setting an open determination threshold for determining whether the monitoring target is open and a close determination threshold for determining whether the monitoring target is closed;
A window open / close monitoring unit that determines whether the monitoring target is open or closed by comparing the detection level detected by the magnetic detection element with the open determination threshold or the close determination threshold;
A window open / close detection device comprising:
The window opening and closing monitoring device according to claim 1, wherein the window opening and closing monitoring unit executes a determination process every predetermined time,
When the previous determination result is a close determination, the opening determination threshold is selected and compared with the magnetic force level, and when the magnetic force level is equal to or lower than the open determination threshold, the window to be monitored is determined,
When the previous determination result is an open determination, the closing determination threshold value is selected and compared with the magnetic force level, and when the magnetic force level is equal to or higher than the closing determination threshold value, it is determined that the monitoring target window is closed. Window open / close detection device.
2. The window opening / closing monitoring apparatus according to claim 1, wherein the threshold setting unit sets the closing determination threshold to a value smaller than the opening determination threshold.
The window opening / closing monitoring apparatus according to claim 1, wherein the threshold setting unit sets the closing determination threshold to a value larger than the opening determination threshold.
  2. The window opening / closing monitoring apparatus according to claim 1, wherein the magnetic detection element is a Hall sensor.

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