JP5307606B2 - Window open / close detection device - Google Patents

Description

The present invention relates to a window opening / closing detection device that detects an opening / closing state of a window using a magnetic detection element.

  2. Description of the Related Art Conventionally, a window opening / closing monitoring device that detects an opening / closing of a window and gives an alarm is known. In such a window open / close monitoring 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 is reduced, it is determined that the window is open / closed and an alarm is issued.

  There is also a monitoring 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, thereby alarming an abnormality.

  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. Further, since the detection signal of the Hall sensor is as weak as 200 to 300 mV, it is determined whether the window is opened or closed using the signal amplified by the amplifier circuit in order to perform AD conversion and process it by a processor or the like.

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

  However, when the magnetic force of the magnet is detected by a hall sensor, the length and shape of the open / close lever of the crescent lock vary, and the position of the window frame to which the window open / close monitoring device is attached is limited. The distance between the magnet and the Hall sensor built into the device is not constant, and the magnetic force from the magnet is attenuated to the square of the distance and decreases, so the magnetic force level may be saturated or extremely reduced depending on the installation location. There is a problem that the distance range in which the unlocking and locking of the crescent lock can be accurately determined from the magnetic force level by the magnet provided on the opening / closing lever is greatly restricted.

  In order to solve this problem, for example, it is conceivable to adjust the gain of the amplifier circuit so that an appropriate magnetic force level corresponding to the distance can be obtained at the installation site. This means that a measuring instrument is brought in and adjusted one by one, which is not a realistic solution and is not feasible.

An object of this invention is to provide the window opening / closing detection apparatus which enables the setting of the appropriate magnetic force level according to the distance to a magnet by simple operation in the installation field.

The present invention relates to a window opening / closing detection device that determines a state of a window by detecting a change in a magnetic level of a magnet arranged in a monitoring target.
A magnetic sensing element for detecting the magnetic level of the magnet;
An amplifying unit that selects and amplifies a detection signal from the magnetic sensing element from a plurality of different gains;
When the magnetic force level obtained from the output signal obtained by amplifying the amplifying unit with high gain is equal to or lower than a predetermined perspective determination threshold, high gain amplification is selected, and when the magnetic force level exceeds the perspective determination threshold, the selected high gain is selected. A perspective selector that selects a lower gain than,
A registration processing unit for calculating and registering a lock determination threshold of a predetermined ratio from the magnetic force level acquired by the gain of the amplification unit selected by the perspective selection unit;
A lock monitoring unit for determining unlocking or locking by comparing the magnetic level acquired from the amplification unit with the gain selected by the perspective selection unit and the lock determination threshold;
It is provided with.

  Here, the lock determination threshold value is calculated from the magnetic force level based on a smaller ratio as the gain of the amplification unit selected by the perspective selection unit becomes lower.

  Further, when the calculated lock determination threshold is not at a magnetic level effective for monitoring the window open / close state, the gain of the amplifying unit is changed so as to be an effective magnetic level, and the lock determination threshold at that gain is registered.

  The amplifier circuit includes a gain selection unit that selects high gain amplification or low gain amplification, and the perspective selection unit determines whether the magnetic force level acquired from the output signal obtained in the high gain selection state of the amplifier circuit is a predetermined perspective. A high gain may be selected when the threshold is less than or equal to a threshold, and a low gain may be selected when the perspective determination threshold is exceeded.

The registration processor
When the magnetic force level is initially registered in the selected state of high gain amplification, a level lower than the magnetic force level by a predetermined first ratio is registered as a lock determination threshold value,
When the magnetic force level is initially registered in the low gain amplification selection state, a level lower than the magnetic force level by a second ratio that is lower than the first ratio is registered as a lock determination threshold value.

  According to the present invention, the magnetic force level obtained from the detection signal of the magnetic sensing element obtained by high gain amplification at the time of setting is compared with the perspective determination threshold, and if the magnetic force level is within an appropriate range, the selected high gain amplification is selected. If the magnetic force level is high, low gain amplification is selected, and an appropriate amplification gain is set according to the distance to the magnet placed on the open / close lever, allowing the crescent lock to be unlocked and locked Can be enlarged.

In addition, the magnetic force level obtained by the appropriate amplification gain selected corresponding to the distance to the magnet is initially registered, and the lock determination threshold is based on a different ratio determined corresponding to the perspective selection with respect to the initially registered magnetic force level. By calculating and registering, it is possible to accurately determine the open / close state of the window and the unlocked state of the crescent with respect to changes in the magnetic force level due to the operation of the opening / closing lever even at the magnetic force level due to different amplification gains.

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 FIG. 4 is a circuit diagram showing an embodiment of an amplifier circuit for amplifying a detection signal of the lock detection hall sensor of FIG. The circuit diagram which showed other embodiment of the amplifier circuit which amplifies the detection signal of the Hall sensor for locking detection of FIG. Explanatory drawing which showed the relationship between the crescent lock detection magnet and Hall sensor in 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 by amplifying the detection signal of the Hall sensor for locking detection in this embodiment by different gains FIG. 4 is a graph showing the relationship between the magnetic force level and the distance when a high amplification gain is selected in FIG. The graph which showed the relationship of the magnetic force level with respect to the distance at the time of selecting the low amplification gain in FIG. 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 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 crescent lock monitoring process in step S8 of FIG.

  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 as a monitoring target provided on the window sash 12a, 12b, and the crescent lock detection magnet 20 attached to the opening / closing lever 18 of the crescent lock 16. Is detected by another Hall sensor built in the lower end.

  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 the display unit 22 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 a hall sensor 46 for detecting window opening / closing is disposed here. A crescent lock detecting hall sensor 48 is provided at the lower end of the circuit board 38.

  3 is an explanatory view showing the relationship between the hall sensor for opening and closing the window and the magnet in the installed state of FIG. 1, in which FIG. 3 (A) shows a plan view and FIG. 3 (B) shows the state seen from the lateral direction. Show.

  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 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 apparatus is minimum, and the window opening / closing detection magnet 14 is a detection signal of a magnetic force level that is maximum with a positive polarity, for example, in accordance with the direction of the magnetic force lines indicated by broken lines. Is 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.

  The window determination threshold value for detecting the opening / closing of the window is measured by arranging a window opening / closing detection magnet 14 that is actually used in combination with a predetermined distance in an inspection process which is the final stage of the manufacturing process or an initial registration operation after installation. This is done through the registration process of the magnetic level using the environment, and details will be made clear later.

  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.

  Furthermore, in the present embodiment, another window determination threshold value is set for judging an illegal act of bringing a strong magnet closer so that the window open / close detection device does not operate due to mischief or the like, and this is regarded as opening the window. The

  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 detected by the window opening / closing detection hall sensor 46 by the window opening / closing detection magnet 14 provided on the window glass is amplified by the amplification circuit 52 and then applied to the AD conversion port 70 to convert the magnetic force level (AD Conversion value) is taken into the processor 50.

  The magnetic force level detection signal detected by the crescent lock detection magnet 20 provided on the open / close lever 18 of the crescent lock 16 detected by the lock detection hall sensor 48 is different between the high gain amplification circuit 54-1 and the low gain amplification circuit 54-2. After being amplified by the gain, it is given to the AD conversion ports 72-1 and 72-2, and the magnetic force level (AD conversion value) obtained by digital conversion 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 of a red LED 56a and a green LED 56b. For example, the red LED 56a is turned on when an abnormality is detected such as opening of a window or unlocking, and then the green LED 56b is turned on when normal operation is restored. To do.

  The registration switch 60 is used for setting a lock registration mode that is performed at the start of use of the window opening / closing detection device 10 of the present embodiment.

  When the magnetic force level Vs1 obtained from the window sensor 46 for detecting the opening / closing of the window, the first window determination threshold value TH1 for window opening / closing detection obtained based on the magnetic force level Vs1, and a strong magnet due to mischief are brought close to the nonvolatile memory 68. A second window determination threshold value TH2 for detecting the magnetic force is stored.

  The nonvolatile memory 68 also includes a magnetic force level Vs2 acquired from the lock detection hall sensor 48 in the crescent lock registration process performed with the window opening / closing detection device 10 installed on the window, and the lock opening / closing obtained based on the magnetic force level Vs2. A lock determination threshold TH3 for detection is stored.

  The processor 50 includes a window opening / closing registration processing unit 74, a perspective selection 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.

  In the registration mode, the window opening / closing registration processing unit 74 detects the magnetic force level Vs1 of the window opening / closing detection magnet 14 arranged at a predetermined distance from the window opening / closing detection device 10 with the window opening / closing detection hall sensor, and initially registers it in the nonvolatile memory 68. Then, a level lower than the initially registered magnetic force level Vs1 by a predetermined ratio is registered in the nonvolatile memory 68 as the first window determination threshold value TH1 for opening and closing the window.

  Further, a non-volatile memory 68 is calculated as a second window determination threshold value TH2 for calculating a level higher than the initially registered magnetic force level Vs1 by a predetermined ratio that cannot be normal, and determining abnormally that a strong magnet has been approached due to mischief or malice. Register with.

  The perspective selection unit 76 operates when the registration mode is set by operating the registration switch 60. As shown in FIG. 1, the registration mode is set by operating 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. When the registration switch 60 is operated in this state, the registration mode is set and the registration process is executed.

  The perspective selection unit 76 that operates in the setting of the registration mode, when the magnetic force level at which the output of the high gain amplifier circuit 54-1 is captured by the AD conversion port 72-1 is equal to or less than a predetermined distance determination threshold TH4, is converted to the AD conversion port 72-. When the acquisition is selected from 1 and the magnetic force level exceeds the perspective determination threshold TH4, the high gain amplifier circuit cannot monitor the normal opening and closing, and therefore corresponds to the output of the low gain amplifier circuit 54-2 having a low gain. Selected from the AD conversion port 72-2.

  As shown in FIG. 1, the lock registration processing unit 78 sets 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. When the registration switch 60 is operated in this state, the registration mode for a predetermined period is set and the registration process is executed.

  When the registration mode is started, the open / close lever 18 of the crescent lock 16 is moved to the locked position to bring the crescent lock detection magnet 20 closer.

During the operation of the registration mode, the lock registration processing unit 74 acquires the magnetic force level detected by the lock detection hall sensor 48 at a predetermined period, and compares it with a predetermined predetermined effective level. This is stored in the nonvolatile memory 68 as a magnetic force level Vs2.
The registration processing unit 74 calculates a value that is lower by a predetermined ratio depending on the amplification gain selected by the perspective selection unit 76 with respect to the initially registered magnetic force level Vs2, and determines whether the crescent lock is unlocked or unlocked. The determination threshold TH3 is registered in the nonvolatile memory 68, and the lock monitoring of the crescent lock by the lock monitoring unit 78 is started.

The lock determination threshold TH3 is calculated by using the ratio α when the high gain amplifier circuit 54-1 is selected, and TH3 = Vs2−α.
Is calculated and set, and when the low gain amplifier circuit 54-2 is selected, the ratio β is used to calculate TH3 = Vs2-β.
Is calculated and set.

  The window opening / closing monitoring unit 80 compares the magnetic force level obtained from the window opening / closing detection hall sensor 46 with the first window determination threshold TH1 read from the nonvolatile memory 68, determines whether the window is open or closed, and indicates a message indicating the determination result. Is transmitted from the wireless transmission unit 66 to the monitoring panel, and an alarm or alarm release is performed.

  Further, the window opening / closing monitoring unit 80 is obtained from the window opening / closing detection hall sensor 46 in order to cope with a so-called fraudulent act of opening a window by bringing a strong magnet from the outside so that the magnetic force level does not fall below a threshold value. The received magnetic force level is compared with the second window determination threshold value TH2 read from the nonvolatile memory 68, and when the magnetic force level exceeds the second window determination threshold value TH2, a message indicating that the window is opened is transmitted. Perform an alarm.

  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 appropriate 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 initial registration level at the time of unlocking, and within the appropriate range. You may make it determine fraud by detecting whether there is a magnetic force level. This can be applied to both the measurement of the magnetic level of the crescent lock side and 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.

  In addition to the transmission of a message based on the judgments of the window opening / closing monitoring unit 80 and the lock monitoring unit 82, the communication control unit 84 causes a periodic notification message to be transmitted at regular time intervals.

  FIG. 5 is a circuit diagram showing an embodiment of an amplifier circuit for amplifying the detection signal of the lock detection hall sensor of FIG. In FIG. 5, the lock detection hall sensor 48 can be represented by an equivalent circuit in which four resistors r are bridge-connected, and the output linearly changes according to the strength of the magnetic field due to the change of the resistance r according to the magnetic field. A voltage is obtained.

  The polarity of the output voltage depends on the direction of the line of magnetic force passing through the lock detection Hall sensor 48, and the output voltage of the positive polarity that the output voltage increases with the increase of the magnetic field, and the output of the negative polarity that the output voltage decreases with the increase of the magnetic field Voltage.

  In FIG. 5, the battery voltage Vcc is directly supplied from the battery 44 to the lock detection hall sensor 48. However, when driving at a constant voltage below the battery voltage, a resistance voltage dividing circuit or the like is used. What is necessary is just to supply the divided voltage.

  The output voltage of the lock detection hall sensor 48 is amplified by the high gain amplifier circuit 54-1, sampled by the AD conversion port 72-1 of the processor 50, and AD converted.

  The output voltage of the lock detection hall sensor 48 is simultaneously amplified by the low gain amplifier circuit 54-2, sampled by the AD conversion port 72-2 of the processor 50, and AD converted.

  The high gain amplifier circuit 54-1 configures a differential amplifier circuit by the operational amplifier 90a and the resistors R1, R3, R5, and R6, and sets the high gain G1. The low gain amplifier circuit 54-2 comprises a differential amplifier circuit by the operational amplifier 90b and the resistors R2, R4, R5, and R6, and sets a low gain G2 having a lower gain than the high gain G1.

Here, R1 = R3, R2 = R4, R5 = R6, R1 <R2, and the high gain G1 of the high gain amplifier circuit 54-1 is G1 = R6 / R1.
And the low gain G2 of the low gain amplifier circuit 54-2 is G2 = R6 / R2.
It becomes.

  FIG. 6 is a circuit diagram showing another embodiment of the amplifier circuit for amplifying the detection signal of the lock detection hall sensor of FIG. 4 so that the high gain G1 and the low gain G2 can be selected by control from the processor 50. It is characterized by that.

  In FIG. 6, an amplifier circuit 54 is a differential amplifier circuit, and a gain selection circuit 92 is provided on the input side of the operational amplifier 90. The switches 96a switch the resistors R1 and R2 with respect to the inverting input terminal, and at the same time non-inverted by the switch 96b. Resistors R3 and R4 for the input terminal are switched. The non-inverting terminal is grounded via a resistor R5, and further connected to a resistor R6 of the feedback circuit between the output terminal and the non-inverting input terminal.

Here, there is a relationship of R1 = R3, R2 = R4, R5 = R6, R1 <R2, and the high gain G1 when the switches 96a and 96b are closed to the a side in the figure is G1 = R6 / R1
The low gain G2 when the switches 96a and 96b are closed to the b side is G2 = R6 / R2.
It becomes.

  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 AD conversion characteristics of the magnetic level detection signal by the AD conversion ports 72-1 and 72-2 of FIG. The lock detection hall sensor 48 shown in FIG. 7 outputs a positive polarity magnetic level detection signal and a negative polarity magnetic level detection signal depending on the direction of passage of the magnetic lines of force.

  The magnetic level detection signal from the lock detection hall sensor 48 is amplified by the high gain G1 of the high gain amplifier circuit 54-1, or the low gain G2 of the low gain amplifier circuit 54-2, and is converted into AD conversion ports 72-1, 72-. 2 is converted into magnetic force level data.

  The conversion characteristics of the AD conversion ports 72-1 and 72-2 have values of 0 to 256 as decimal AD conversion values, as shown on the vertical axis, and the positive polarity magnetic level detection signals 0 to + Vmax are input. The AD conversion values are converted to AD conversion values 128 to 256, and the input negative magnetic level detection signals 0 to -Vmax are converted to AD conversion values 128 to 0.

  FIG. 9 is an example of 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. 7, and the characteristic A has a high gain G1. The characteristic B is a measurement result when the low gain G2 is selected.

  The actual conversion characteristics of the AD conversion port 72 are as shown in FIG. 8, but in FIG. 9, the AD conversion value is set to 0 regardless of the polarity of the magnetization level detection signal for the sake of simplicity. ~ 128.

  In the perspective selection unit 76 provided in the processor 50 of FIG. 4, when operating in the registration mode, the high gain G1 is initially set. For this reason, the magnetic force level as an AD conversion value according to the characteristic A is set. Is obtained.

  The perspective selection unit 76 sets the perspective determination threshold TH4. If the magnetic force level Vs obtained by the amplification by the initial setting of the high gain G1 is in the range 98 that is equal to or smaller than the perspective determination threshold TH4, the distance to the magnet is increased. If the magnetic force level Vs exceeds the perspective determination threshold TH4 and is in the range 100, it is determined that the distance h to the magnet is close and the low gain G1 is selected. The level Vs is adjusted to fall within the range 98.

  Here, the effective monitoring range is a range other than 128 ± γ as the reference value of the AD conversion value giving the zero point in FIG. 8, and therefore there is a magnetic force level in the effective monitoring range 98 of γ <Vs ≦ TH4 in FIG. Sometimes high gain G1 is selected. Further, when in the range 100 of TH4 <Vs ≦ 128, the low gain G2 is selected and adjusted so that the magnetic force level Vs falls within the effective monitoring range 98.

  When this relationship is applied to the AD conversion characteristics shown in FIG. 8, in the case of a positive polarity magnetic force level detection signal, the magnetic gain level Vs selects the high gain G1 in the effective monitoring range 98-1, and selects the low gain G2 in the range 100-1. In the case of a negative polarity magnetic force level detection signal, the high gain G1 is selected in the range 98-2 and the low gain G2 is selected in the range 100-2. When switching to the gain G2, not only the magnetic force level Vs measured by the initial setting but also the lock determination threshold TH3 calculated from the Vs by a predetermined ratio falls within the effective monitoring range 98 so that the gains G1 and G2 The perspective determination threshold TH4 is set in consideration of the switching timing.

  FIG. 10 shows a case where the high gain G1 is selected by the perspective selection unit 76, and the lock registration processing unit 78 provided in the processor 50 of FIG. 4 sets the magnetic level Vs2 at the point P, for example, by amplification by the selection of the high gain G1. If acquired, the acquired magnetic force level Vs2 is initially registered in the nonvolatile memory 68.

Subsequently, the lock determination threshold TH3 is set to TH3 = Vs2−αVs2 as a value lower by the ratio α corresponding to the high gain G1 selected from the initially registered magnetic force level Vs2.
And is registered in the nonvolatile memory 68.

  11 shows a case where the low gain G2 is selected by the perspective selection unit 76 when the acquired magnetic force level Vs2 enters the range 100 in FIG. 10, and the crescent lock registration processing unit 78 provided in the processor 50 of FIG. If the magnetic force level Vs2 at the Q point is acquired by amplification by selecting the low gain G2, the acquired magnetic force level Vs2 is initially registered in the nonvolatile memory 68.

Subsequently, the lock determination threshold TH3 is set to TH3 = Vs2−βVs2 as a value lower by the ratio β corresponding to the low gain G2 selected from the initially registered magnetic force level Vs2.
And is registered in the nonvolatile memory 68.

  FIG. 12 is a flowchart showing the monitoring process of this embodiment by the processor of FIG. In this flowchart, before opening the product, the window opening / closing detection magnet 14 is arranged at a predetermined distance to measure the magnetic force level Vs1, and the first and second window determination thresholds TH1 and TH2 are stored in the nonvolatile memory 68 in advance. Although an example of setting is shown, the magnetic force level Vs1 and the first and second window determination thresholds TH1 and TH2 may be calculated and registered by measuring the magnetic force level Vs1 after installation on the site.

  In FIG. 12, 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 Data including the magnetic force level Vs1 of the window opening / closing monitoring and the first and second window determination thresholds TH1 and TH2 stored in 68 is read.

  Subsequently, the process proceeds to step S3, and when the setting of the lock monitoring registration mode is determined by turning on the registration switch 60, the process proceeds to step S4, where the amplification gain is selected and the magnetic force level Vs2 by the lock detection hall sensor 48 is set. Locking monitoring registration processing including initial registration and registration of a lock determination threshold TH3 for detecting locking and unlocking of the crescent lock 16 is executed.

  Subsequently, in step S5, for example, 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 and low battery monitoring processing for the battery 44 is executed. 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, the crescent lock open / close monitoring process is executed, and when it is determined whether the lock is unlocked or after that, 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. 13 is a flowchart showing details of the crescent lock registration process in step S4 of FIG. In FIG. 13, first, in step S11, it is determined whether the registration switch 60 is turned on. For the 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 registration switch 60 is operated, it is determined that the registration switch is turned on, the process proceeds to step S12, the red LED 56a blinks, and the registration mode is started in step S13.

  When the registration mode is started, the high gain amplifier circuit 54-1 is selected by selecting capturing from the AD conversion port 72-1 in step S14. Subsequently, in step S15, it is determined whether or not a predetermined registrable period has elapsed, and until the registrable period elapses, the process proceeds to step S16 to acquire the magnetic force level Vs in the selected state of high gain amplification. In step S17, it is determined whether or not the distance is below the perspective determination threshold TH4.

  If it is equal to or smaller than the perspective determination threshold TH4, the process proceeds to step S19 while maintaining the high gain selection state. If the distance determination threshold TH4 is exceeded, the process proceeds to step S18 to select capturing from the AD conversion port 72-2. Thus, the low gain amplification is selected, and the magnetic force level is acquired after the selection.

  Then, it progresses to step S19, the acquired magnetic force level is compared with the predetermined effective level set beforehand, and when it exceeds the effective level, it progresses to step S20 and memorize | stores in the non-volatile memory 68 as magnetic force level Vs1.

  Subsequently, in step S21, it is checked whether or not the high gain amplifying circuit 54-1 is selected. If the high gain selecting circuit 54-1 is selected, the process proceeds to step S22, and the lock is lowered by a predetermined ratio α from the initially registered magnetic force level Vs2. The determination threshold TH3 is calculated and registered in the nonvolatile memory 68.

  If the selection of the low gain amplifier circuit 54-2 is determined in step S21, the process proceeds to step S23, and the lock determination threshold value TH3 lower by a predetermined ratio β is calculated from the initially registered magnetic force level Vs2 and registered in the nonvolatile memory 68.

  When the magnetic force level Vs2 and the lock determination threshold TH3 are registered in the nonvolatile memory 68, the green LED 56b of the display unit 56 is turned on in step S24, and the lock monitoring of the crescent lock is started by the lock monitoring unit 82 in step S25.

  On the other hand, if the operation of returning the open / close lever 18 of the crescent lock 16 to the locked position is not performed during the registration possible period in which the registration mode is set by operating the registration switch 60, the effective level is exceeded in step S19. Since the magnetic force level cannot be obtained, when the elapse of the effective registration period is determined in step S15, the process proceeds to step S26, the red LED 56a is switched from blinking to lighting, and the initial registration failure is displayed, and the registration process is performed in step S27. The error state is registered, and the lock monitoring of the crescent lock by the lock monitoring processing unit 78 is canceled.

  FIG. 14 is a flowchart showing details of the window opening / closing monitoring process in step S7 of FIG.

  In FIG. 14, first, the magnetic force level detected by the window opening / closing detection hall sensor 46 in step S31 is acquired as an AD conversion value. The process proceeds to step S32, and if it is determined that the previous window open determination is made, the process proceeds to step S33. Is compared with the first window determination threshold TH1.

  If the magnetic force level is equal to or lower than the first window determination threshold value TH1 in step S33, the process proceeds to step S34 to determine window opening, and in this case, the change from the window closing determination state to the window opening determination state is changed. Therefore, in step S35, the red LED 56a is turned on to notify the change in state to the abnormality detection state.

  Subsequently, in step S36, a window opening determination message is wirelessly transmitted to the monitoring panel, and when the wireless transmission is completed, the red LED 56b is turned off in step S37.

  On the other hand, if the magnetic force level exceeds the first window determination threshold value TH1 in step S33, it is compared with the second window determination threshold value TH2 in step S38, and if it is greater than or equal to the second window determination threshold value TH2, a powerful magnet due to mischief or the like. Is determined to be an abnormal increase in the magnetic force level due to approaching from the outside, the process proceeds to step S34 to determine window opening, and the red LED 56a is lit until the wireless transmission of the window opening determination message is completed in steps S35 to S37.

  If the previous determination was an open determination in step S32, the process proceeds to step S39. If the magnetic force level is greater than the first window determination threshold level TH1 and less than the second window determination threshold TH2, the process proceeds to step S40. Closed judgment is performed.

  Subsequently, in step S41, the lock monitoring unit 82 determines whether or not the crescent lock is currently closed, and if it is determined to be closed, the window is closed and the normal monitoring state in which the lock is closed is changed to step S42. Go to and select the green LED 56a. On the other hand, if the open determination is being made in step S41, the window is opened and the abnormality is detected to be locked, so the process proceeds to step S43 and the red LED 56b is selected.

  In step S44, the already selected red LED 56a or green LED 56b is turned on, and a window closing determination message is wirelessly transmitted in step S45. When the transmission is completed, the lit LED is turned off in step S46.

  FIG. 15 is a flowchart showing details of the crescent lock opening / closing monitoring process in step S8 of FIG.

  In FIG. 15, first, the magnetic force level detected by the lock detection hall sensor 48 is acquired as an AD conversion value in step S51, and the process proceeds to step S52. When it is determined that the previous lock determination is made, the process proceeds to step S53. Compare with the lock determination threshold TH3.

  If the magnetic force level is equal to or lower than the lock determination threshold value TH3 in step S53, the process proceeds to step S54 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 S55, the red LED 56a is turned on to notify the state change to the abnormality detection state.

  Subsequently, in step S56, an unlocking determination message is wirelessly transmitted to the monitoring panel. When the wireless transmission is completed, the red LED 56b is turned off in step S57.

  If the previous determination was an open determination in step S52, the process proceeds to step S58, and if the magnetic force level is greater than the lock determination threshold level TH3, the process proceeds to step S59 to perform a lock determination.

  Subsequently, in step S60, the window opening / closing monitoring unit 78 determines whether or not the window is currently closed. If it is determined that the window is closed, the window is closed and the normal monitoring state is locked. Go to and select the green LED 56a.

  On the other hand, if the window open determination is being made in step S60, since it is in an abnormality detection state in which the window is open and locked, the process proceeds to step S62 and the red LED 56b is selected.

  In step S63, the already selected red LED 56a or green LED 56b is turned on, a lock determination message is wirelessly transmitted in step S64, and when the transmission is completed, the lit LED is turned off in step S65.

  Moreover, although the example which detects the state of a crescent lock is shown in said embodiment, it can apply also in the detection of a window opening / closing detection magnet, and the distance of the window opening / closing detection apparatus 10 and the window opening / closing detection magnet 14 is installation conditions. Therefore, the perspective determination may be performed according to the magnetic level, the optimum gain may be selected, and the open / close threshold value may be calculated according to the gain.

  The window determination threshold value TH2 for detecting that an intruder approaches another magnet and illegally intrudes is calculated based on the measured magnetic level, and the gain is selected so that the calculated window determination threshold value TH2 falls within the effective monitoring range 98. To do. The window determination threshold value TH2 is higher than the magnetic level VS1 in the locked state in the normal state. When the window determination threshold value TH2 exceeds the effective monitoring range 98, a lower gain is selected, and each value VS1, TH1, and All TH2 are within the effective monitoring range 98.

  The determination threshold value TH <b> 2 for detecting an unauthorized approach of another magnet by an intruder may also be adopted in the state detection of the crescent lock 16. Also in this case, the gain is selected so that all the threshold values TH3 including the threshold value TH2 and the locked magnetic level VS2 are within the effective monitoring range 98.

  In the above embodiment, two types of gain selection, high gain or low gain, are selected. However, the present invention is not limited to this, and a plurality of different gains are prepared so that the magnetic force level and the threshold value are within the optimum ranges. You may make it choose so. The window determination threshold TH2 in the above embodiment is calculated by selecting a low gain and a high gain and changing the ratio of reduction from the magnetic level. The calculation may be performed with a lower ratio of decreasing the value as the gain decreases.

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 opening / closing detection device 14: Window opening / closing detection magnet 16: Crescent lock 20: Crescent lock detection magnet 52, 54: Amplifying circuit 54-1: High gain amplifying circuit 54-2: Low gain amplifying circuits 70, 72-1, 72-2: AD conversion port 74: Window opening / closing registration processing unit 76: Perspective selection unit 78: Locking registration processing unit 80: Window opening / closing monitoring unit 82: Locking monitoring unit

Claims (4)

In a window opening / closing detection device that detects a change in the magnetic level of a magnet arranged in a monitoring target and determines the state of the window,
A magnetic sensing element for detecting the magnetic level of the magnet;
An amplifying unit for selecting and amplifying a detection signal from the magnetic sensing element from a plurality of different gains;
When the magnetic force level acquired from the output signal obtained by amplifying the amplification unit with a high gain is equal to or lower than a predetermined perspective determination threshold, the high gain amplification is selected, and when the magnetic force level exceeds the perspective determination threshold, the selection is performed. A perspective selector that selects a lower gain than a higher gain,
A registration processing unit that calculates and registers a lock determination threshold value of a predetermined ratio from the magnetic force level acquired by the gain of the amplification unit selected by the perspective selection unit;
A lock monitoring unit for determining unlocking or locking by comparing the magnetic level acquired from the amplification unit with the gain selected by the perspective selection unit and the lock determination threshold;
Equipped with a,
The window opening / closing detection device , wherein the lock determination threshold is calculated from the magnetic force level based on a smaller ratio as the gain of the amplification unit selected by the perspective selection unit decreases .
In the window opening and closing detection device according to claim 1,
If the calculated lock determination threshold is not at a magnetic level effective for monitoring the window open / close state, the gain of the amplifying unit is changed to be an effective magnetic level, and the lock determination threshold at the changed gain is registered. A window opening / closing detection device characterized by the above.
In the window opening and closing detection device according to claim 1,
The amplifier circuit includes a gain selection unit that selects high gain amplification or low gain amplification,
The perspective selection unit selects the high gain when the magnetic force level acquired from the output signal obtained in the high gain selection state of the amplifier circuit is equal to or lower than a predetermined perspective determination threshold, and exceeds the perspective determination threshold. If it is, the window open / close detection device is characterized by selecting the low gain.
The window opening / closing monitoring apparatus according to claim 3 , wherein the registration processing unit includes:
When the magnetic force level is initially registered in the selected state of the high gain amplification, a level lower than the magnetic force level by a predetermined first ratio is registered as a lock determination threshold value.
A window opening / closing detection device, wherein when a magnetic force level is initially registered in the low gain amplification selection state, a level lower by a second ratio than the first ratio is registered as a lock determination threshold value. .

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