JP5307607B2 - Window open / close detection device - Google Patents

Description

The present invention relates to a window open / close detection device that detects the open / closed state of a window using a magnetic sensing element such as a hall sensor.

  2. Description of the Related Art Conventionally, a window opening / closing detection device that detects and alerts the opening / closing of a window is known as a monitoring target. In such a window opening / closing detection device, the magnetic force of the magnet arranged on the window glass is detected by the magnetic sensing element, and when the detected magnetic force decreases, the window opening / closing is determined and an alarm is given. There is also a device that detects the magnetic force of a magnet disposed on an open / close lever of a crescent lock provided on a window by another magnetic sensing element, and determines that the crescent lock is open when the detected magnetic force is reduced, and gives an alarm.

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

  When the Hall sensor is used as a magnetic sensing element, the closer the magnet is to the detection target, the stronger the magnetic force passes through the Hall sensor, thereby obtaining a higher sensor output. In the opening / closing detection of the window based on the magnetic level detected by the Hall sensor, a value that is lower by a predetermined ratio than the maximum value of the magnetic level detected with the window closed is set as a determination threshold. During monitoring, if the detected magnetic level falls below the determination threshold, it is determined that the window is open and an alarm is given.

  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 the alarm is restored.

  When installing a window opening / closing detection device on a window sash on site, the window opening / closing detection device is fixed to the window vertical frame by fixing the window opening / closing detection device next to the vertical frame inside the sliding window with double-sided tape or screws. A strip-shaped magnet is aligned to the outside window glass facing the side and attached with double-sided tape.

For this alignment, it is desirable that the center of the magnet in the vertical direction be the position of the Hall sensor built in the device. The correct positioning is possible. In this attached state, the distance between the magnet and the hall sensor built in the apparatus is substantially shortest, and the maximum magnetic force level or a level close thereto is obtained.

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

  However, in the installation work of such a conventional window opening / closing detection device in the field, even if the upper end of the magnet is aligned with the upper end of the window opening / closing detection device attached to the vertical window frame, for example, it may be positioned. In actual field work, correct positioning is not always possible, and the vertical positional relationship between the magnet and the Hall sensor varies greatly.

  Such a variation in position has a relationship in which the magnetic force decreases in proportion to the square of the distance as the distance from the magnet increases. Therefore, if the positional deviation is large, the magnetic force detected by the Hall sensor in the window closed state. There is a possibility that the resolution for window opening / closing will be lowered and the detection accuracy for window opening / closing will be lowered.

In order to solve this problem may be increased positioning accuracy of the mounting work in the field is, the status of your only that window to the mounting site may vary, the mounting work in the field due to the narrow tolerance of the positioning error There is a problem that takes time and effort.
Furthermore, the magnet to be employed when there are multiple types, for dimensions and force pattern of the magnet difference exists, the detection accuracy by the position of the magnet and the Hall sensor employing different.

It is an object of the present invention to provide a window open / close detection device that can widen the allowable installation range of magnets arranged separately from a magnetic sensing element built in the device so that a magnetic force level with sufficient resolution can be obtained when the window is closed. Objective.

The present invention provides a window opening / closing detection apparatus,
A plurality of magnetic sensing elements for detecting a magnetic force level by a magnet disposed on a monitoring target;
A magnetic sensing element selection unit that compares magnetic force levels detected by a plurality of magnetic sensing elements in a closed state of the window, and selects a magnetic sensing element that has obtained the highest magnetic accuracy level in window state monitoring;
A window open / close monitoring unit that determines whether the window is open or closed by comparing the magnetic force level detected by the selected magnetic sensing element with a predetermined determination threshold;
It is provided with.

  Here, the window opening / closing detection device of the present invention includes, for example, two magnetic sensing elements, and arranges the two magnetic sensing elements at a predetermined distance in the vertical direction in an installed state with respect to the window vertical frame.

The window opening / closing detection device of the present invention further detects and registers the magnetic force level by the selected magnetic sensing element when determining the registration operation in the closed state of the window, and sets the determination threshold based on the registered magnetic force level. A registration processing unit for obtaining and registering is provided.
The magnetic sensing elements that are not selected by the magnetic sensing element selection unit are used to monitor that a magnet that is not normally used for monitoring the open / close state of the window is improperly approached.

  According to the present invention, a hall sensor as, for example, two magnetic sensing elements is arranged at a predetermined distance in the longitudinal direction of the apparatus main body, and among the magnetic force levels by the magnets detected by the two hall sensors when the window is closed, Even if there is a deviation in the vertical mounting position of the magnets to be separated by selecting the Hall sensor with the magnetic force level that has the highest detection accuracy in the window status monitoring, it is optimal A Hall sensor is selected, and it is possible to detect the opening and closing of the window with high accuracy by a magnetic force level having a sufficient resolution without being affected by the displacement of the magnet.

Moreover, even if the magnet used in combination with the window open / close detection device has a different height dimension due to the difference in the magnetic material used, the most effective monitoring is possible for the arrangement of magnets of different sizes. A Hall sensor is selected, and it is possible to detect the opening and closing of the window with high accuracy by a magnetic force level having a sufficient resolution even when the size of the magnet itself is different.

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 relationship between a hall sensor and a magnet in the installation state of FIG. The block diagram which showed the circuit structure of the window opening / closing detection apparatus by this embodiment 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 with respect to the distance of the magnetic force level acquired from the detection signal of the two hall sensor for window opening / closing detection in this embodiment Explanatory drawing which showed the relationship between the crescent lock detection magnet and Hall sensor in this embodiment The graph which showed the relationship of the magnetic force level with respect to the distance of the Hall sensor for locking detection in this embodiment 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 registration process in step S3 of FIG. The flowchart which showed the detail of the crescent lock registration process in step S4 of FIG. The flowchart which showed the detail of the window opening / closing monitoring process in step S7 of FIG. The flowchart which showed the detail of the locking monitoring process in step S8 of FIG. Explanatory drawing showing the relationship between the Hall sensor and the magnet in the installed state when two types of magnets with different sizes are used

  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 a window sash 12a, 12b of a sliding window to be monitored by a double-sided tape or a screw.

  On the upper side of the window opening / closing detection device 10, the window sash 12 a, 12 b is closed, and a window opening / closing detection magnet 14 is attached to the opposite position with double-sided tape, and the magnetic force from the window opening / closing detection magnet 14 is incorporated. It is detected by a Hall sensor as a magnetic sensing 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 provided on the window sash 12a, 12b, and the magnetic force of the crescent lock detection magnet 20 attached to the opening / closing lever 18 of the crescent lock 16 is lowered to the lower end. It is detected by another hall sensor built in the 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. Alarm is transmitted by radio transmission to the monitoring panel.

  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, and 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 surface. The display state of 22 display parts (not shown) is made visible.

  The apparatus main body 22 has a circuit board 38 assembled in a body case 36.

  A sensor board 45 is erected on the upper side of the circuit board 38, and the first window opening / closing detection hall sensor 46-1 and the second window opening / closing detection hall sensor 46-2 are arranged apart from each other by a predetermined distance L. Yes. A crescent lock detecting hall element 48 is provided at the lower end of the circuit board 38.

  FIG. 3 is an explanatory diagram showing the relationship between the hall sensor 46 for detecting window opening and closing and the magnet 14 in the installed state of FIG. 1, in which FIG. 3 (A) shows a plan view and FIG. 3 (B) shows a side view. The state is shown.

  As shown in FIG. 3 (A), the window opening / closing detection device 10 of the present 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. 3B, the window opening / closing detection hall sensor built in the window opening / closing detection device 10 includes a first window opening / closing detection hall sensor 46-1 and a second window opening / closing detection hall sensor on the sensor substrate 45. 46-2 is arranged up and down with a predetermined distance L apart.

  The allowable attachment range of the magnet 14 on the glass surface of the window sash 12b with respect to the first and second window opening / closing detection hall sensors 46-1 and 46-2 is a boundary separated by a distance L from the sensor center line 47 in the vertical direction. The range is between the lines 49a and 49b.

  FIG. 3B shows a state in which the vertical center of the magnet 14 is positioned on the first window opening / closing detection hall sensor 46-1 arranged on the upper side, and the first window opening / closing detection hall sensor 46 as viewed from the magnet 14. -1 is shorter than the distance to the second window opening / closing detection hall sensor 46-2, the magnetic force level by the detection signal from the first window opening / closing detection hall sensor 46-1 becomes larger. Therefore, in the case of FIG. 3B, it is assumed that the sensor with a large magnetic force level can detect the opening and closing of the window with sufficient resolution with high accuracy. Selected for monitoring.

  FIG. 3C shows a state in which the center of the magnet 14 in the vertical direction is positioned on the second window opening / closing detection hall sensor 46-2, and the second window opening / closing detection hall sensor viewed from the magnet 14 is shown. Since the distance to 46-2 is shorter than the distance to the first window opening / closing detection hall sensor 46-1, the magnetic force level by the detection signal from the second window opening / closing detection hall sensor 46-2 becomes larger. Therefore, in the case of FIG. 3C, the second window opening / closing detection hall sensor 46-2 is selected for window opening / closing monitoring.

  That is, if the vertical center of the magnet 14 is within the range of the distance L above the sensor center line 47, the first window opening / closing detection hall sensor 46-1 is selected, and the distance L below the sensor center line 47 is selected. If it is within the range, the second window opening / closing detection hall sensor 46-1 is selected.

  Depending on the structure of the window, the window sash 12b may be on the inside, and the window opening / closing detection device 10 may be installed in the vertical frame in the direction opposite to that in FIG. In that case, the lines of magnetic force generated by the window opening / closing detection magnet 14 affixed to the glass surface of the window sash 12a pass through the window opening / closing detection hall sensor 46 from left to right, and are in the opposite direction to that shown in FIG. Therefore, the magnetic sensor level detection signal having a negative polarity is output from the window opening / closing detection hall sensor 46.

  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.

  The magnetic force level detection signal by the window opening / closing detection magnet 14 provided on the window glass detected by the first window opening / closing detection hall sensor 46-1 is amplified by the amplifier circuit 52-1 and then given to the AD conversion port 70-1. The digitally converted magnetic force level (AD conversion value) is taken into the processor 50.

  Similarly, the magnetic force level detection signal by the window opening / closing detection magnet 14 provided on the window glass detected by the second window opening / closing detection hall sensor 46-2 is amplified by the amplification circuit 52-2 and then converted into the AD conversion port 70-2. The digitally converted magnetic force level is received by the processor 50.

  Further, a 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 also amplified by the amplifier circuit 54 and then applied to the AD conversion port 72 for digital conversion. The obtained magnetic force level is taken into the processor 50.

  A display unit 56, a registration switch 60, and a wireless transmission unit 66 are provided for the processor 50.

  The display unit 56 is provided with a two-color LED. For example, the display unit 56 is lit in a different color according to the opening or unlocking of the window to display the state.

The registration switch 60 is used for setting a window opening / closing registration mode and a crescent lock registration mode performed when the use of the window opening / closing detection device 10 of the present embodiment is started.
The wireless transmission unit 66 is provided with a transmission circuit and wirelessly transmits a monitoring state to the monitoring panel.

  In the nonvolatile memory 68, the first window opening / closing detection hall sensor 46-1 or the second window opening / closing detection hall sensor selected in the window opening / closing registration process performed with the window opening / closing detection device 10 installed in the window. The magnetic force level Vsi obtained from 46-2 (where i = 1 or 2), the first window determination threshold value TH1 for window opening / closing detection obtained based on the magnetic force level Vsi, and the magnetic force when a strong magnet due to mischief is brought close The second window determination threshold value TH2 for detecting is stored.

  The non-volatile memory 68 also includes a magnetic force level Vs3 acquired from the lock detection hall sensor 48 in the crescent lock registration process performed following the window open / close registration process, and a lock determination threshold value for the lock open / close detection obtained based on the magnetic force level Vs3. TH3 is stored.

  The processor 50 includes a sensor selection unit 74, a window opening / closing registration processing unit 76, a lock registration processing unit 78, a window opening / closing monitoring unit 80, a lock monitoring unit 82, and a communication control unit 84 as functions realized by execution of a program by the CPU. Is provided.

  The sensor selection unit 74 operates when the window opening / closing registration mode is set by operating the registration switch 60, and the detection signals of the first and second window opening / closing detection hall sensors 46-1, 46-2 in the closed state of the window. The magnetic force levels Vs1 and Vs2 acquired from the above are compared, and the Hall sensor having the larger level is selected. Specifically, the selection of the Hall sensor selects the acquisition of the magnetic force level from the AD conversion ports 70-1 and 70-2.

  The window opening / closing registration processing unit 76 acquires, for example, a magnetic force level Vs1 by the window opening / closing detection magnet 14 from the AD conversion port 70-1 selected by the sensor selection unit 74 in the window closed state at a predetermined period, and is set to a predetermined predetermined value. If it exceeds the effective level, it is stored in the nonvolatile memory 68 as the magnetic force level Vs1.

  The magnetic force levels Vs1 and Vs2 acquired from the detection signals of the first and second window opening / closing detection hall sensors 46-1 and 46-2 measured at the time of initial registration may be initially registered in the nonvolatile memory 68.

  When the initial registration is completed, a level lower than the magnetic force level Vs1 registered by the selected hall sensor by a predetermined ratio is calculated as the first window determination threshold value TH1 for opening / closing the window and registered in the nonvolatile memory 68. That is, the threshold value TH1 for determining the opening of the window when the window is opened and the magnetic force detection level value of the Hall sensor decreases is registered. Further, a level that is higher than the initially registered magnetic force level Vs1 by a predetermined ratio, which is not normal, is registered in the nonvolatile memory 68 as the second window determination threshold value TH2 for determining the magnetic force of a strong magnet brought closer by mischief.

  The lock registration processing unit 78 operates when the crescent lock registration mode is set by re-operation of the registration switch 60, and while the LED 56 is blinking, that is, during the predetermined registration valid period after the registration switch 60 is operated. Then, 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.

  During the operation of the crescent lock registration mode, the lock registration processing unit 78 acquires the magnetic force level detected from the lock detection hall sensor 48 at a predetermined cycle, and compares it with a predetermined effective level set in advance and exceeds the effective level. In this case, the magnetic force level Vs3 is stored in the nonvolatile memory 68.

  The registration processing unit 74 calculates a level lower than the initially registered magnetic force level Vs3 by a predetermined ratio, and registers it in the nonvolatile memory 68 as the lock determination threshold TH3. That is, the threshold TH3 for determining whether the crescent is unlocked when the crescent lock is opened and the magnetic force detection level value of the hall sensor is lowered is registered.

  The window opening / closing monitoring unit 80 reads the magnetic force level from the first window opening / closing detection hall sensor 46-1, for example, taken in from the AD conversion port 70-1 selected by the sensor selection unit 74, from the nonvolatile memory 68. Compared with the window determination threshold value TH1, it is determined whether the window is open or closed, and a message indicating the determination result is transmitted from the wireless transmission unit 66 to the monitoring panel to cause an alarm or alarm release.

  Further, the window opening / closing monitoring unit 80 approaches the selected AD conversion port 70- in order to cope with an illegal act by opening the window so that the magnetic force level does not become the threshold value TH1 or less by bringing a strong magnet close from the outside. 1 is compared with the second window determination threshold value TH2 read from the nonvolatile memory 68, and the magnetic force level exceeds the second window determination threshold value TH2. Also, it is assumed that the window is open and an alarm is given.

  In addition, based on the magnetic force level at the time of locking and unlocking, an appropriate range of the magnetic level of the normal use state is set, and if the magnetic force level deviates up and down from the appropriate range, it may be determined that fraud has occurred. good. In other words, the upper limit value of the proper use range is set to a value that is higher by a predetermined ratio than the magnetic force level at the time of locking, and the lower limit value is set to a value that is lower by a predetermined ratio than the zero point level at the time of unlocking, so that the magnetic force is within the proper range. It is possible to detect whether there is a level and determine fraud. This can be applied to either the measurement of the magnetic level of the crescent lock or the measurement of the magnetic level of the window opening / closing detection.

  The lock monitoring unit 82 compares the magnetic force level obtained from the lock detection hall sensor 48 with the lock determination threshold value TH3 set by the lock registration processing unit 78, and determines that the crescent lock is opened when the lock determination threshold value TH3 or less. Then, an electronic message indicating unlocking is transmitted from the wireless transmission unit 66 to the monitoring panel to give an alarm. Further, even when the lock monitoring unit 80 detects unlocking and then returns to locking, the lock monitoring unit 80 wirelessly transmits a message to that effect to the monitoring panel.

  The communication control unit 84 transmits a message based on the judgments of the window opening / closing monitoring unit 80 and the lock monitoring unit 82.

  FIG. 5 is a graph showing the AD conversion characteristics of the magnetic level detection signal by the AD conversion port 70-1 of FIG. The first and second window opening / closing detection hall sensors 46-1 shown in FIG. 5 output a positive polarity magnetic level detection signal and a negative polarity magnetic level detection signal according to the direction of passage of magnetic lines of force.

  The magnetic level detection signal from the first window opening / closing detection hall sensor 46-1 is amplified by the amplifier circuit 52-1, and the amplified magnetic force level detection signal (voltage signal) is AD converted.

  The conversion characteristic of the AD conversion port 70-1 has a value of 0 to 256 as a decimal AD conversion value as indicated by the vertical axis, and an input positive polarity magnetic level detection signal 0 to + Vmax is converted into an AD conversion value 128. The negative polarity magnetic level detection signals 0 to -Vmax are converted into AD conversion values 128 to 0. The AD conversion ports 70-2 and 72 also have the same conversion characteristics as in FIG.

  FIG. 6A shows the relationship of the magnetic force level detected by the first and second window opening / closing detection hall sensors 46-1 and 46-2 with respect to the distance d from the device side surface to the window opening / closing detection magnet 14 in the present embodiment. FIG. The actual conversion characteristics of the AD conversion ports 70-1 and 70-2 are as shown in FIG. 5, but in FIG. 6, regardless of the polarity of the magnetic force level detection signal, in order to simplify the explanation. The AD conversion values are shown as 0 to 128.

  6A corresponds 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 installed state of FIG. 3B, for example. The AD conversion value is shown, the characteristic A is the magnetic force level by the first window opening / closing detection hall sensor 46-1, and the characteristic B is the magnetic force level by the second window opening / closing detection hall sensor 46-2.

  With respect to such characteristics, for example, if the distance d when installed on site is d = 9 mm, the characteristic A by the first window opening / closing detection hall sensor 46-1 is the magnetic force level Vs 1, and the second window opening / closing is performed. In the characteristic B by the detection hall sensor 46-2, the magnetic force level is Vs2. In this case, the sensor selection unit 74 provided in the processor 50 of FIG. 4 acquires the high magnetic force level Vs1 and the first window opening / closing detection hall sensor 46-. 1 is selected, and the subsequent magnetic force level is taken in from the AD conversion port 70-1.

FIG. 6B shows the characteristic A by the first window opening / closing detection hall sensor 46-1 selected by the sensor selector 74, and the magnetic level Vs 1 obtained at point P is initially registered in the nonvolatile memory 68. . Subsequently, a value lower than the initially registered magnetic force level Vs1 by a predetermined ratio α is set to the first window determination threshold TH1 as TH1 = Vs1−α · Vs1.
And is registered in the nonvolatile memory 68.

Further, the second window determination threshold TH2 in which the initially registered magnetic force level Vs1 is increased by a predetermined ratio β to a value that cannot be monitored normally is TH2 = Vs1 + β · Vs1.
And registering in the non-volatile memory 68 as a determination threshold value that considers an illegal act such as a mischief that brings a strong magnet from the outside close.

  Here, when the magnetic force level Vs1, the first window determination threshold value TH1, and the second window determination threshold value TH2 shown in FIG. 6B are reflected in the AD conversion value of FIG. The magnetic force level Vs1 is Vs1 = Vs1 + 128, the Q point window determination threshold TH1 is TH1 = 128 + TH1, and the R point window determination threshold TH2 is TH2 = 128 + TH2.

  When the magnetic force level is negative, the magnetic force level Vs1 at point S is Vs1 = 128-Vs1, the window determination threshold value TH1 at point T is TH1 = 128-TH1, and the window determination threshold value TH2 at point U is TH2 = 128-. TH2.

  FIG. 7 is an explanatory diagram showing the relationship between the crescent lock detection magnet 48 and the lock detection hall sensor 48 in the present embodiment. In FIG. 7, a lock detection hall sensor 48 is disposed at the crescent lock side end of the apparatus main body 22 in the window opening / closing detection apparatus 10, and a conical magnetic current collector 26 housed in the cover member 24 in front (downward) thereof. Is arranged.

  The crescent lock detection magnet 20 provided on the open / close lever 18 of the crescent lock 16 is located at a distance h from the outer end surface of the illustrated cover member 24 in the locked state of the open / close lever 18, and the distance h at this lock position is the minimum distance. Become. The magnetic flux from the crescent lock detection magnet 20 enters the large-diameter incident surface of the magnetic collector 26, then converges on the opposite small-diameter exit surface and passes through the lock detection hall sensor 48.

  The magnetic flux generated by the crescent lock detection magnet 20 is detected as a voltage signal corresponding to the magnetic force by the lock detection hall sensor 48, amplified by the amplification circuit 54, and then read as a magnetic force level (AD conversion value) by the AD conversion port 72. .

  FIG. 8 is a graph showing the relationship between the magnetic force level detected by the lock detection hall sensor 48 and the distance h from the device end face to the crescent lock detection magnet 20 shown in FIG.

  The actual conversion characteristics of the AD conversion port 72 are the same as those in FIG. 5, but in FIG. 8, the AD conversion value is set to 0 regardless of the polarity of the magnetic force level detection signal in order to simplify the description. ~ 128.

  For example, if the lock registration processing unit 78 provided in the processor 50 of FIG. 4 acquires the magnetic force level Vs3 at the point P, the lock registration processing unit 78 initially registers the acquired magnetic force level Vs3 in the nonvolatile memory 68.

Subsequently, the lock determination threshold TH3 is set to TH3 = Vs2−γ · Vs2 as a value lower than the initially registered magnetic force level Vs3 by a predetermined ratio γ.
And is registered in the nonvolatile memory 68.

  FIG. 9 is a flowchart showing the monitoring process of this embodiment by the processor of FIG.

  In FIG. 9, when the power is turned on with the installation at the site as shown in FIG. 3, the initialization process and the self-diagnosis process are executed in step S1, and if there is no abnormality, the process proceeds to step S2, and the nonvolatile memory The data stored in 68 is read.

  Subsequently, the process proceeds to step S3, where the cover member 24 is opened and the registration switch 60 is turned on to execute the window opening / closing registration process, and the magnetic force level Vs1 and the window determination thresholds TH1, TH2 are registered in the nonvolatile memory 68.

  Subsequently, the process proceeds to step S4, and the lock switch registration is executed by turning on the registration switch 60 again, and the magnetic force level Vs3 and the lock determination threshold value TH3 are registered in the nonvolatile memory 68.

  Subsequently, in step S5, it is determined whether or not a predetermined monitoring period has been reached. If it is determined that the monitoring period has been reached, the process proceeds to step S6 to execute a low battery monitoring process for the battery 44. At this time, if the battery voltage drops below the specified voltage, a message indicating a low battery is wirelessly transmitted to the monitoring device 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 device. In step S18, a crescent lock locking monitoring process is executed, and when it is determined whether the lock is unlocked or the subsequent lock is closed, a message indicating the contents is transmitted to the monitoring device. Subsequently, in step S9, it is determined whether the periodic notification time has elapsed, and if it has been determined, the process proceeds to step S10, and a periodic notification process for transmitting a periodic notification message to the monitoring device is performed.

  FIG. 10 is a flowchart showing details of the window opening / closing registration process in step S3 of FIG. In FIG. 10, it is first determined in step S11 that the registration switch 60 is turned on, and the window open / close detection magnet 14 is set to the minimum distance as shown in FIG. When setting and operating the registration switch 60, it is determined that the registration switch is turned on, the process proceeds to step S12, the red LED 56a blinks, and the window open / close registration mode is started in step S13.

  When the registration mode is started, the magnetic force levels Vs1, Vs2 by the first and second window opening / closing detection hall sensors 46-1 and 46-2 are acquired from the AD conversion ports 70-1 and 70-2 in step S14, and step S15. The AD conversion port 70-1 or 70-2 is selected so as to read the higher magnetic force level.

  Subsequently, in step S16, it is determined whether or not a predetermined registrable period has elapsed. Until the registrable period elapses, the process proceeds to step S17, where the selected magnetic force level is acquired, and acquired in step S18. The obtained magnetic force level is compared with a predetermined effective level set in advance, and if it is an effective level, the process proceeds to step S19 and is stored in the nonvolatile memory 68 as the magnetic force level Vs1. The determination of whether the value is an effective level is based on the measured magnetic force level, whether the window is open or closed, and whether an intruder can improperly approach the magnet, and the window determination threshold value calculated in the subsequent steps Whether TH1 and TH2 are not present in the vicinity of 0 of the AD conversion value in FIG. 6 and whether the magnetic force level can be set to a threshold value that does not become near 128 or a saturation value of 128 or more is determined.

  Subsequently, in step S20, a window determination threshold value TH1 that is lower than the initially registered magnetic force level Vs1 by a predetermined ratio α is calculated and registered in the nonvolatile memory 68.

  In addition, a window determination threshold value TH2 for determining a fraudulent act by mischievous approaching a strong magnet from the outside with a magnetic force level Vs1 initially registered at step S21 being higher by a predetermined ratio β is calculated and registered in the nonvolatile memory 68.

  When the magnetic force level Vs1 and the window determination thresholds TH1 and TH2 are registered in the nonvolatile memory 68, the window opening / closing monitoring process by the window opening / closing monitoring unit 80 is started in step S22, and the green LED 56b of the display unit 56 is turned on in step S23. Notification of registration completion.

  On the other hand, if the magnetic force level exceeding the effective level is not obtained in step S18 during the registerable period in which the registration mode is set by operating the registration switch 60, the elapse of the registerable period is determined in step S16. When the process proceeds to step S24, the red LED 56a is switched from blinking to lighting to indicate the failure of the initial registration, the registration process error state is registered, and the window opening / closing monitoring processing unit 78 cancels the window opening / closing monitoring. To do.

  FIG. 11 is a flowchart showing details of the crescent lock registration process in step S4 of FIG. In FIG. 11, first, in step S31, it is determined whether the registration switch 60 is turned on. For initial registration of the magnetic force level, the open / close lever 18 is operated to the unlocked position to set the crescent lock detecting magnet 20 to the maximum distance. When the cover member 24 is opened and the registration switch 60 is operated, it is determined that the registration switch is turned on, the process proceeds to step S32, the red LED 56a blinks, and the registration mode is started in step S33.

  Subsequently, in step S34, it is determined whether or not a predetermined registrable period has elapsed. Until the registrable period elapses, the process proceeds to step S35, where the magnetic force level Vs3 is acquired, and valid in step S36. It is determined whether or not the open / closed state is within a range that can be monitored. If the value is effective for monitoring, the process proceeds to step 37, where it is stored as the acquired magnetic force level Vs3, and the fact that it has been registered normally is displayed in step S38.

  Subsequently, the process proceeds to step S39, where a lock determination threshold TH3 that is lower than the initially registered magnetic force level Vs3 by a predetermined ratio γ is calculated and registered in the nonvolatile memory 68, and the lock monitoring of the crescent lock is started by the lock monitoring unit 82 in step S40. .

  On the other hand, if the cover member 24 is closed and the opening / closing lever 18 of the crescent lock 16 is not returned to the locked position during the registration possible period in which the registration mode is set by the operation of the registration switch 60, a step is performed. Since it is not possible to obtain a magnetic force level exceeding the effective level in S36, when it is determined in step S34 that the registerable period has elapsed, the process proceeds to step S41, the red LED 56a is switched from blinking to lighting, and an initial registration failure is displayed. In S42, the error status of the registration process is registered, and the lock monitoring of the crescent lock by the lock monitoring processing unit 78 is canceled.

  FIG. 12 is a flowchart showing details of the window opening / closing monitoring process in step S7 of FIG.

  In FIG. 12, first, for example, the magnetic force level detected by the first window opening / closing detection hall sensor 46-1 selected in step S51 is acquired as an AD conversion value, and the process proceeds to step S52 where the previous time is the window opening determination. If it is determined, the process proceeds to step S53 and is compared with the window determination threshold value TH1.

  If the magnetic force level is equal to or smaller than the window determination threshold TH1 in step S53, the process proceeds to step S54 to determine window opening, and in this case, the change is from the window closing determination state to the abnormality detection state that is the window opening determination state. In step S55, the red LED 56a is turned on to notify the state change to the abnormality detection state.

  Subsequently, in step S56, a window opening determination message is wirelessly transmitted to the monitoring device. When the wireless transmission is completed, the red LED 56b is turned off in step S57.

  On the other hand, when the magnetic force level exceeds the window determination threshold value TH1 in step S53, it is compared with the window determination threshold value TH2 in step S58. It is determined that the magnetic force level is abnormally increased, and the process proceeds to step S54 to determine window opening. In steps S55 to S57, the red LED 56a is turned on until wireless transmission of the window opening determination message is completed.

  If the previous determination was an open determination in step S52, the process proceeds to step S59, and if the magnetic force level is greater than the window determination threshold level TH1 and smaller than the window determination threshold TH2, the process proceeds to step S60 to perform window closing determination. .

  Subsequently, in step S61, the lock monitoring unit 82 determines whether or not the crescent lock is currently being closed. If it is being closed, the window is closed and the normal monitoring state in which the lock is closed is changed to step S62. Go to and select the green LED 56a. On the other hand, if the open determination is being made in step S61, it is in an abnormality detection state in which the window is open and locked, and the process proceeds to step S63 to select the red LED 56b.

  In step S64, the selected red LED 56a or green LED 56b is turned on, and a window closing determination message is wirelessly transmitted in step S65. When the transmission is completed, the lit LED is turned off in step S66.

  FIG. 13 is a flowchart showing details of the crescent lock opening / closing monitoring process in step S8 of FIG.

  In FIG. 13, first, the magnetic force level detected by the locking detection hall sensor 48 is acquired as an AD conversion value in step S71, and the process proceeds to step S72. When it is determined that the previous lock determination is made, the process proceeds to step S73. Compare with the lock determination threshold TH3.

  If the magnetic force level is equal to or lower than the lock determination threshold TH3 in step S73, the process proceeds to step S74 to determine the unlocking state, and in this case, it is a change from the unlocking determination state to the abnormality detection state that becomes the unlocking determination state. In step S75, the red LED 56a is turned on to notify the state change to the abnormality detection state.

  Subsequently, in step S76, the unlocking determination message is wirelessly transmitted to the monitoring device. When the wireless transmission is completed, the red LED 56b is turned off in step S77.

  If the previous determination was an open determination in step S72, the process proceeds to step S78, and if the magnetic force level is greater than the lock determination threshold level TH3, the process proceeds to step S79 to perform a lock determination.

  Subsequently, in step S80, the window opening / closing monitoring unit 80 determines whether the window is currently closed or not. If the window is being closed, the window is closed and the normal monitoring state is changed to the locked state. Go to and select the green LED 56a.

  On the other hand, if the window opening determination is being made in step S80, the window LED is open and the abnormality is detected to be locked, so the process proceeds to step S82 and the red LED 56b is selected. In step S83, the selected red LED 56a or green LED 56b is turned on, the lock determination message is wirelessly transmitted in step S84, and when the transmission is completed, the lit LED is turned off in step S85.

  FIG. 14 is an explanatory diagram showing the relationship between the hall sensor and the magnet in the installed state when two types of magnets having different sizes are used.

  FIG. 14A shows a case where a samarium cobalt magnet 14-1 is used, and FIG. 14B shows a case where a nedium magnet 14-2 is used. The neodymium magnet 14-1 is the most powerful magnet, and the samarium cobalt magnet 14-2 is known as the next magnet.

  Therefore, when the same magnetic force is generated, the length of the nedium magnet 14-2 in FIG. 14B is shortened to L2 with respect to the length L1 of the samarium cobalt magnet 14-1 in FIG. 14A. .

  Therefore, as shown in FIG. 14A, when the upper end of the samarium cobalt magnet 14-1 is positioned on the attachment reference line 90 determined by, for example, the marker 24a of the cover member 24 of FIG. The center of the direction is set to face the second window opening / closing detection hall sensor 14-2. In this case, since the magnetic force level by the second window opening / closing detection hall sensor 14-2 is larger, reading of the magnetic force level by the AD conversion port 70-2 is selected.

  On the other hand, as shown in FIG. 14B, when the upper end of the nedium magnet 14-2 is positioned on the attachment reference line 90 of the window opening / closing detection device 10, the center in the vertical direction is the first window opening / closing detection hall sensor 14-2. To be relative to. In this case, since the magnetic force level by the first window opening / closing detection hall sensor 14-1 is larger, reading of the magnetic force level by the AD conversion port 70-1 is selected.

  As described above, in this embodiment, two types of magnets having different sizes can be used interchangeably due to the difference in magnetic material.

  In the above embodiment, the case where two hall opening / closing detection hall sensors are arranged apart from each other by a predetermined distance in the vertical direction is taken as an example. However, three or more hall sensors are arranged. May be.

  In the above embodiment, the determination threshold is obtained by initially registering the magnetic force level including the offset of the Hall sensor. However, the offset of the Hall sensor is measured and stored in the nonvolatile memory, and the initial registration is performed. When calculating the judgment threshold from the magnetic level, the magnetic level change amount is accurately obtained by subtracting the offset from the magnetic level, a value lower by a predetermined ratio is obtained from this change amount, and the offset is added to this value as the judgment threshold value. Also good.

  In the above embodiment, the opening / closing monitoring of the window is performed by selecting the Hall sensor with the higher magnetic force level, but the higher magnetic force level measured at the time of registration is within the effective range for monitoring. In the case of an extremely high value exceeding the level, for example, the other Hall sensor having a low magnetic force level may be selected. In this case, it may be selected on the condition that the lower magnetic force level is within the effective monitoring range. You may make it select the magnetic detection element from which the measured magnetic force level and various threshold value TH1, TH2 are the level of the range effective for monitoring.

  Further, in the above embodiment, the hall sensors that are not selected in the registration mode are not used for monitoring, but may be used for monitoring the window open / closed state. For example, the initial value of the magnetic level of both Hall elements is registered in the registration mode, and even if the magnetic level of the Hall sensor selected for window opening / closing monitoring detects an appropriate range value, If the magnetic force level shows a value significantly different from the magnetic force level at the time of normal monitoring, it may be judged that there is a possibility of fraud such as bringing another magnet closer, and an alarm may be issued.

  Further, even when the detected value of the magnetic level of the hall sensor that has not been selected becomes higher than the detected value of the magnetic level of the selected hall sensor, an alarm may be output because there is a possibility of fraud. .

  The hall sensor that was not selected is set as a hall sensor for detecting fraud, and for this hall sensor, a threshold value obtained by multiplying the initial detection value of the magnetic force level by a predetermined ratio is calculated. In the case shown, it may be determined that an unauthorized intruder is approaching the magnet and trying to enter, and an alarm may be issued.

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.

10: Window open / closed detection device 14: Window open / closed detection magnet 22: Device main body 46-1: Hall sensor for first window open / close detection 46-2: Hall sensor for second window open / close detection 48: Hall sensor for lock detection 60: Registration Switch 74: Sensor selection unit 76: Window open / close registration processing unit

Claims (3)

A plurality of magnetic sensing elements for detecting a magnetic force level by a magnet disposed on a monitoring target;
A magnetic sensing element selector that compares magnetic force levels detected by the plurality of magnetic sensing elements in a closed state of the window, and selects a magnetic sensing element having the highest detection accuracy in the window state monitoring;
A window opening / closing monitoring unit for determining whether the window is opened or closed by comparing a magnetic force level detected by the selected magnetic sensing element and a predetermined determination threshold;
With
2. The window opening / closing detection apparatus according to claim 1, wherein the magnetic sensing elements are arranged with a predetermined distance in the vertical direction in the installed state with respect to the vertical window frame .
The window opening / closing detection apparatus according to claim 1, further comprising: detecting and registering a magnetic force level with the selected magnetic sensing element when the registration operation is determined in a closed state of the window, and setting the registered magnetic force level to the registered magnetic force level. A window opening / closing detection apparatus comprising a registration processing unit for obtaining and registering the determination threshold based on the determination threshold.
  2. The window opening / closing detection apparatus according to claim 1, wherein the magnetic sensing elements not selected by the magnetic sensing element selection unit monitor that a magnet not normally used for monitoring the window opening / closing state approaches illegally. A window open / close detection device.

Images