JP2010129009A - Window opening/closing detecting device - Google Patents

Abstract

According to a combination of a magnetic sensing element and a magnet that are actually used, it is possible to perform initial registration of an appropriate magnetic force level and to set a determination threshold for opening and closing a window.
A window opening / closing monitoring device determines whether the window is open or closed by comparing a magnetic force level detected by a window sensor for detecting opening / closing of a window with a determination threshold value, and wirelessly transmits the determination result. The lock monitoring device 78 compares the magnetic force level determination threshold detected by the lock detection hall sensor 48 to determine whether the lock is open or closed, and wirelessly transmits the lock. The rank table 88 stores the relationship between rank information and amplification gain set according to the output characteristics of the Hall sensor. The gain control unit 76 changes the gain of the amplifier circuit so that the gain obtained from the rank table 88 is obtained based on the rank information of the Hall sensor at the time of activation.
[Selection] Figure 6

Description

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

  2. Description of the Related Art Conventionally, a wireless window opening / closing detection device that detects opening / closing of a window and sends it to a monitoring panel wirelessly as an alarm is known as a monitoring target. In such a window opening / closing detection device, the magnetic detection element detects the magnetic force of the magnet placed on the window glass, and when the detected magnetic force decreases, it is determined that the window is open / closed and an abnormal detection signal is transmitted to the alarm panel wirelessly. Alarm. Also, when the magnetic force of the magnet placed on the open / close lever of the Crescent lock as a monitoring target provided on the window is detected by another magnetic detection element, and the detection magnetic force decreases due to the opening / closing lever being released and the magnet moving away from the magnetic detection element Therefore, it is determined that the crescent lock is released, and an abnormality detection signal is wirelessly transmitted to the alarm panel to give an alarm.

  The magnetic detection elements used in conventional window open / close monitoring devices mainly use reed switches that mechanically turn contacts on and off according to the strength of the magnetic force, but in recent years, the Hall effect has been used. Therefore, it has been studied to employ a Hall sensor that detects magnetic force.

  When the Hall sensor is used as a magnetic sensing element, the closer to the magnet to be detected, the stronger the magnetic force that passes through the Hall sensor, the higher the sensor output. Window open / closed detection based on the magnetic force level detected by the Hall sensor is set as a threshold value that is determined by multiplying the maximum value of the magnetic force level detected when the window is closed by a predetermined ratio, and is detected during monitoring. When the level of the magnetic force being reduced falls below the determination threshold value, it is determined that the window is open, and a message indicating that the window is open is transmitted to the monitoring panel for alarming.

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

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

  However, in the conventional window opening / closing detection device that determines opening or closing of a window by comparing the magnetic force level detected by such a conventional hall sensor with a predetermined determination threshold, the determination threshold for determining opening / closing of the window Is based on parameters determined by design, such as the Hall sensor used, the magnetic force of the magnet, the detection distance between the magnet and the Hall sensor, and the gain of the amplifier circuit. The hall sensors used have large variations in output characteristics, so ranks are usually displayed according to the magnitude of the output voltage, and it is difficult to determine the output characteristics as a design parameter. It is in.

  Also, the magnets installed on the window glass have some variation in the strength of the magnetic force, and even if they are arranged at the same distance, the magnetic force passing through the Hall sensor is greatly different.

  For this reason, even if an optimum determination threshold is set based on the design parameters, depending on the combination of the magnet and the Hall sensor, the magnetic force level may not reach the determination threshold when the window is closed, and may be erroneously detected as a window open. There is a problem that the quality is not stable.

An object of the present invention is to provide a window opening / closing detection device that enables initial registration of an appropriate magnetic force level and setting of a window opening / closing determination threshold value in accordance with a combination of a magnetic detection element and a magnet that are actually used.

The present invention
A magnetic sensing element for detecting a magnetic force level by a magnet arranged inside the apparatus and arranged on the monitoring object side;
A window opening and closing monitoring unit that determines the state of the monitoring object by comparing the magnetic force level detected by the magnetic detection element and a predetermined determination threshold;
In a window opening / closing detection device comprising:
A registration processing unit is provided that detects a magnetic force level by a magnet actually used in combination in a predetermined measurement environment and is initially registered in a nonvolatile memory, and obtains a determination threshold based on the detected magnetic force level. Features.

The window opening / closing detection device of the present invention further includes:
An amplification circuit capable of changing the gain for amplifying the output signal of the magnetic sensing element;
A rank table storing the relationship between rank information set according to the output characteristics of the magnetic sensing element and the gain of the amplifier circuit;
A gain control unit that changes the gain of the amplifier circuit to be the gain obtained from the rank table based on the rank information of the magnetic sensing element at the time of startup of the device;
It is provided with. The magnetic sensing element is a Hall sensor.

  According to the present invention, there are variations in the output characteristics of the Hall sensor, and the magnetic sensor level is detected and initially registered in accordance with the Hall sensor actually used. Appropriate initial registration of magnetic force level and determination threshold can be set.

  Also, prepare a rank table that sets the correspondence between the rank information classified according to the output characteristics provided by the manufacturer and the gain required for the amplifier circuit, and the rank of the Hall sensor used at the start of the device By acquiring the required gain from the information and automatically changing and controlling the gain of the amplifier circuit so that it becomes a gain according to the rank information, the output shortage and output over of the Hall sensor are properly corrected and stabilized By detecting the magnetic force level, initial registration and determination threshold setting, and subsequent window opening and closing can be appropriately performed.

In addition, magnets actually used in combination are placed at a predetermined distance for detecting window closing, the magnetic force level is detected by a Hall sensor as a magnetic sensing element, and initial registration is performed, and determination is made from the initially registered magnetic force level. By obtaining the threshold value, the correct magnetic level corresponding to the Hall sensor and magnet actually used can be obtained, and the judgment threshold value for judging the opening / closing of the window is set appropriately, and a stable device with no false detection can be obtained. And can increase the reliability of window monitoring.

  FIG. 1 is an explanatory view showing an installation state of a window opening / closing detection device according to the present invention. In FIG. 1, a window opening / closing detection device 10 of the present invention is fixed to a vertical frame of window sashes 12a and 12b to be monitored by double-sided tape or screws. On the upper side of the window opening / closing detection device 10, the window sash 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 a monitoring device wirelessly 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 14 is lowered to the lower end. It is detected by another hall sensor built in the side.

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

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

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

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

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

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

  In addition, a serial port 55 having four terminal pin holes is provided at the center of the upper part of the apparatus main body 22. By connecting an external personal computer to the serial port 55, programs and data can be transferred to and from the built-in processor. It is said.

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

  FIG. 4 is an explanatory diagram showing the relationship between the hall sensor and the magnet in the installed state of FIG. 1, in which FIG. 4 (A) shows a plan view, and FIG. 4 (B) shows a state seen from the lateral direction.

  As shown in FIG. 4 (A), the window opening / closing detection device 10 of this embodiment is attached to the vertical frame of the window sash 12a located inside by double-sided tape or screws, and is opposed to the right side surface of the window opening / closing detection device 10. The window opening / closing detection magnet 14 is adhered to the glass surface of the window sash 12b with double-sided tape.

  As shown in FIG. 4B, 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. With the window sashes 12a and 12b closed, the distance d from the side of the device is minimized, and the window opening / closing detection magnet 14 outputs a magnetic force level detection signal that is maximum with a positive polarity, for example, according to the direction of the magnetic field lines indicated by the broken lines. Output.

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

  This amplification factor and determination threshold are set in a magnetic level registration process using a measurement environment in which a window opening / closing detection magnet 14 that is actually used in combination with a predetermined distance is used in an inspection process that is the final stage of the manufacturing process. The details will be made clear later.

  FIG. 5 is an explanatory diagram showing the relationship between the Hall sensor and the magnet in the installed state in which the opening and closing of the window is reversed with respect to FIG. In this case, as shown in FIG. 5A, the window sash 12b is on the inside, and the window opening / closing detection device 10 is installed in the vertical frame in the opposite direction to FIG.

  For this reason, in the state seen from the horizontal direction of FIG. 5B, the magnetic field lines indicated by the broken lines 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 element 46 from left to right. However, since the direction is opposite to that in the case of FIG. 4B, a magnetic force level detection signal having a negative polarity is output from the window opening / closing detection hall sensor 46.

  In this embodiment, a determination threshold based on the measurement of the magnetic force level is set by the registration process at the manufacturing stage so that the locking and unlocking can be determined for both of the magnets shown in FIGS. The

  FIG. 6 is a block diagram showing a circuit configuration of the window opening / closing detection apparatus according to the present embodiment. In FIG. 6, 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.

  A magnetic force level detection signal from the window opening / closing detection magnet 14 provided on the window glass detected by the window opening / closing detection hall sensor 46 is amplified by the amplifier 52 and then applied to the AD conversion port 70, and is converted into a digital converted magnetic force level (AD conversion). Value) is taken into 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 54 and then applied to the AD conversion port 72 for digital conversion. The magnetic force level (AD conversion value) is taken into the processor 50.

  FIG. 7 is a circuit diagram showing the details of the window opening / closing detection hall sensor 46 and the amplifier circuit 52 of FIG. In FIG. 7, the window opening / closing detection hall sensor 46 can be represented by an equivalent circuit in which four resistors r are bridge-connected, and changes linearly according to the strength of the magnetic field due to the change of the resistance r according to the magnetic field. An output voltage is obtained.

  The polarity of the output voltage depends on the direction of the line of magnetic force passing through the window opening / closing detection hall sensor 46, and the output voltage has a positive polarity in which the output voltage increases with an increase in the magnetic field, and the negative polarity in which the output voltage decreases with an increase in the magnetic field. Output voltage.

  In FIG. 7, the battery voltage Vc is directly supplied from the battery 44 to the window opening / closing detection hall sensor 46. However, in the case of constant voltage driving at a voltage lower than the battery voltage, a resistance voltage dividing circuit or the like is used. What is necessary is just to supply the voltage divided by.

  The output voltage of the hall sensor 46 for detecting window opening / closing is amplified by the amplifier circuit 52, sampled by the AD conversion port 70 of the processor 50, and converted into, for example, 8-bit AD conversion data.

  The amplifier circuit 52 is a differential amplifier circuit, and is provided with a gain changing circuit 92 on the input side of the operational amplifier 90. The switch SW1 switches the resistances R1 and R2 with respect to the inverting input terminal, and at the same time the switch SW2 has resistance against the non-inverting input terminal. R3 and R4 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, and the gain G1 when the switches SW1 and SW2 are closed to the a side in the figure is G1 = R6 / R1.
The gain G2 when the switches SW1 and SW2 are closed to the b side is G2 = R6 / R2.
It becomes. The switches SW1 and SW2 are semiconductor switches such as transistors that are switched by a control signal from the program 50.

  In the present embodiment, the gain of the amplifier circuit 52 is automatically changed based on rank information given as manufacturing information to the window opening / closing detection hall sensor 46.

Note that the amplifier circuit 52 in FIG. 7 is an example in which the gain is switched to two stages of G1 and G2. However, the number of switching stages may be further increased, and the number of switching stages may be increased using a digital variable resistor or the like. The gain can be changed. The amplifier circuit 54 provided for the lock detection hall sensor 48 also has the same circuit configuration as the amplifier circuit 52 of FIG.
Note that the gain changing means may perform AD conversion after preparing and amplifying a plurality of amplifiers having different gains.

  Referring to FIG. 6 again, the processor 50 is provided with a display unit 56, a frequency switch 58, a registration switch 60, a test switch 62, a tamper switch 64, and a wireless transmission unit 66.

  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 abnormality is detected such as opening of a window or unlocking, and then the green LED 56b is turned on when the normal operation is restored. The frequency switch 58 selects any one of a plurality of usable channels prepared in advance for the wireless transmission unit 66.

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

  The wireless transmission unit 66 is provided with a transmission circuit, and wirelessly communicates the monitoring state to the monitoring panel.

  The nonvolatile memory 68 stores a magnetic force level Vs acquired from the window opening / closing detection hall sensor 46 of the apparatus and a window opening / closing detection determination threshold TH obtained based on the magnetic force level Vs.

  In the present embodiment, rank information 86 and a rank table 88 are stored in advance in the nonvolatile memory 68 in order to automatically change the gain of the amplifier circuit 52 shown in FIG.

  FIG. 8 is an explanatory diagram of the rank table 88 stored in the nonvolatile memory 68 of FIG. FIG. 8A shows rank information given as manufacturing information of the Hall sensor used in the present embodiment. For example, ranks C to G are ranked in the range of the output voltage of the Hall sensor.

  Here, the output voltage is a value obtained when a magnetic field having a magnetic flux density B = 50 mT is applied in a state where the power supply voltage Vcc = 1 V is applied and driven at a constant voltage.

  For example, in the case of AD conversion in which the output voltage at the measured magnetic flux density B = 50 mT is amplified to 1 volt, the 1V amplification gain corresponding to each rank is in the range shown on the right side, and the set gain of each rank is the gain range. The approximate median value can be determined.

  If the set gain can be determined from the rank information given as such manufacturing information, a rank table 88 as shown in FIG. 8B is created and stored in the nonvolatile memory 68 in FIG. At the same time, rank information 86 indicating the rank of the window opening / closing detection hall sensor 46 actually used is stored in the nonvolatile memory 68.

The gains G1 and G2 that can be switched by the gain changing circuit 92 provided in the amplifier circuit 52 shown in FIG. 7 are set to the values of the resistors RR1 to R4 and R6 so as to switch the set gains of the rank table 88 of FIG. I have decided. Here, since the amplifier circuit 52 in FIG. 7 uses two-stage switching of gains G1 and G2, for example, the Hall sensors of ranks F and G of the rank table 88 are used, and the gain corresponding to this is used. G1 = 3.5
G2 = 3.0
Is set to be changeable.

  Referring again to FIG. 6, the processor 50 includes a window opening / closing registration processing unit 74, a gain control unit 76, a lock registration processing unit 78, a window opening / closing monitoring unit 80, and lock monitoring as functions realized by execution of a program by the CPU. Unit 82 and communication control unit 84 are provided.

  The window opening / closing registration processing unit 74 detects the magnetic force level Vs by the window opening / closing detection magnet 14 actually used in combination at a predetermined distance in a measurement environment such as the final inspection process of the manufacturing process, and initially stores it in the nonvolatile memory 68. A level that is lower than the initially registered magnetic force level Vs by a predetermined ratio is registered in the nonvolatile memory 68 as the window opening / closing determination threshold value TH. The details of this window opening / closing registration process will be clarified later.

  The gain control unit 76 acquires a corresponding gain from the rank table 88 based on the rank information 86 of the mounted window opening / closing detection hall sensor 46 stored in the nonvolatile memory 68 when the apparatus with the battery 44 is started. Then, the gain of the amplifier circuit 52 is changed so as to be the acquired gain. The gain change based on the rank information 68 is performed in the same manner for the amplifier circuit 54 provided for the lock detection hall sensor 48.

  As shown in FIG. 1, the lock registration processing unit 74 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. In this state, when the cover member 24 is removed and the registration switch 60 of the apparatus main body 22 is operated as shown in FIG. 3, the registration mode is set and the registration process is executed.

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

  During the registration mode operation, the lock registration processing unit 74 acquires the magnetic force level detected by the lock detection hall sensor 48 and compares it with a predetermined effective level set in advance. Stored in the memory 68 as a magnetic force level.

  Note that the initial registration of the magnetic force level is performed a plurality of times, and the last obtained magnetic force level is initially registered in the nonvolatile memory 68 when the effective level is continuously obtained a predetermined number of times.

  When the magnetic force level is effectively initially registered in the nonvolatile memory 68, the green LED 56b of the display unit 56 is turned on to notify the completion of the initial registration. When the initial registration is completed, the registration processing unit 74 calculates a value that is lower by a predetermined ratio than the initially registered magnetic force level, registers the value in the nonvolatile memory 68 as a determination threshold value for determining whether the crescent lock is unlocked, and locks monitoring unit 78. Starts monitoring of crescent locks.

  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 within a predetermined time in which the registration mode is set by operating the registration switch 60, the effective level is set. The initial registration of the magnetic force level is not completed because the magnetic force level is not obtained, and when the registration mode is set within a predetermined time, the red LED 56a switches from blinking to lighting, indicating that the initial registration has failed. Then, the error status of the registration process is set, and the lock monitoring of the crescent lock by the lock monitoring processor 78 is canceled.

  In this case, the initial registration of the magnetic force level can be performed again by returning the opening / closing lever 18 to the unlocked position, opening the cover member 24 and operating the registration switch 60.

  The window opening / closing monitoring unit 80 compares the magnetic force level obtained from the window opening / closing detection hall sensor 46 with the determination threshold value TH read from the nonvolatile memory 68, determines whether the window is open or closed, and wirelessly transmits a message indicating the determination result. The alarm is transmitted from the unit 66 to the monitoring device, and the alarm is released.

  In addition, the open / close monitoring unit 80 approaches a so-called fraudulent act such as opening a window so that the magnetic force level does not fall below the threshold by bringing a strong magnet close to the outside. A message indicating that the window has been opened is transmitted even when the threshold value exceeding a predetermined threshold is exceeded. Also, based on the magnetic force level at the time of locking and unlocking, an appropriate range of the magnetic level of normal use is set, and if the magnetic level deviates up and down from the appropriate range, it is 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, the lower limit value is set to a value that is a predetermined ratio smaller than the zero point level at the time of unlocking, and the magnetic force is within the proper range. It is possible to detect whether there is a level and determine fraud. This is applicable not only to the measurement of the magnetic level of the crescent lock but also to 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 threshold set by the lock registration processing unit 78, and determines that the crescent lock is unlocked when the lock level is below the threshold. The electronic message shown is transmitted from the wireless transmission unit 66 to the monitoring device to give an alarm. In addition, even when the lock monitoring unit 82 detects unlocking and returns to normal, the lock monitoring unit 82 wirelessly transmits a message to that effect to the monitoring device.

  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. 9 is an explanatory diagram showing the arrangement of magnets and hall sensors in the initial registration of the magnetic force level for window opening / closing monitoring performed in a measurement environment such as an inspection process during manufacturing.

  In FIG. 9, if the window opening / closing detection device 10 that has been assembled is placed in the measurement environment and, for example, an on-site installation as shown in FIG. 4 is planned, the window opening / closing detection hall sensor 46 built in the window opening / closing detection device 10. The window opening / closing detection magnet 14 that is actually used is arranged, for example, d = 20 mm away from the left side surface of the apparatus, which is assumed during normal use, so as to be opposed to the effective detection surface.

  In this case, the position of the window opening / closing detection magnet 14 in the height direction is set so that the upper end of the magnet is aligned with the marker 24a formed on the cover member 24 shown in FIG. The positional relationship of FIG. 9 where the detection hall sensor 46 is located is obtained.

  For the window opening / closing detection device 10, a personal computer for registration support is connected to the serial port 55, for example, and a program that functions as the window opening / closing registration processing unit 74 is downloaded.

  When the setting in the test environment is completed, as shown in FIG. 3, when the registration switch 60 is turned on with the cover 24 removed, the red LED 56a blinks and the downloaded window opening / closing registration processing program is started. To set the window open / close registration mode and start the registration operation. When the registration switch 50 is operated, the cover member 24 is quickly closed to the apparatus main body.

  This registration operation takes in the magnetic force level detected by the window opening / closing detection hall sensor 46, determines whether or not the effective level is set in advance, and if the effective magnetic level Vs is obtained, the non-volatile memory 68 stores it. Initial registration. When this initial registration is completed, the green LED 56b is turned on to notify the completion of the initial registration.

  In the initial registration of the magnetic force level, the magnetic force level is taken in a plurality of times, and the magnetic force level Vs obtained last is initially registered in the nonvolatile memory 68 when the effective level is exceeded a predetermined number of times.

  When the initial registration of the magnetic force level Vs is completed, a level lower than the predetermined ratio is calculated in the window opening / closing detection threshold TH and registered in the nonvolatile memory 68.

  When the window opening / closing registration processing is completed, the window opening / closing registration processing program downloaded for this purpose may be left, but is deleted because it is unnecessary.

  When the installation site is as shown in FIG. 5, the window opening / closing detection magnet 14 is arranged at d = 20 mm on the right side of the apparatus and the same window opening / closing registration process is executed to perform initial registration of the magnetic force level Vs and the determination threshold TH. Register.

  However, after the window opening / closing detection magnet 14 is placed on the left side and the magnetic force level is initially set and the determination threshold value is obtained, even if the reverse placement relationship is obtained at the actual site, the difference between the left and the right for the initially registered magnetic force level There is almost no difference in level, and even if the layout is reversed, it is possible to monitor the opening and closing of the window by installing it as it is without performing initial registration again.

  FIG. 10 is a graph showing the AD conversion characteristics of the magnetic force level detection signal by the AD conversion port 70 of FIG. The window opening / closing detection hall sensor 46 shown in FIG. 6 outputs 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 force level detection signal from the window opening / closing detection hall sensor 46 is amplified by the amplification circuit 52 which is changed to a gain corresponding to the rank. The magnetic force level detection signal (voltage signal) amplified by the amplifier circuit 52 is converted into, for example, 8-bit magnetic force level data (AD converted value) by the AD conversion port 70.

  The conversion characteristic of the AD conversion port 70 has a value of 0 to 256 as a decimal AD conversion value as shown by the vertical axis in FIG. 10, and the input positive polarity magnetic force level detection signals 0 to + Vmax are converted into AD conversion values. It converts into 128-256, and the magnetic force level detection signal 0-Vmax of the minus polarity input is converted into AD conversion value 128-0.

  FIG. 11 is a graph showing the relationship between the magnetic force level detected by the window opening / closing detection hall sensor 46 and the distance d from the device side surface to the window opening / closing detection magnet 14 in the present embodiment. The actual conversion characteristics of the AD conversion port 70 are as shown in FIG. 10, but in FIG. 11, the AD conversion value is set to 0 regardless of the polarity of the magnetization level detection signal in order to simplify the description. ~ 128.

  The characteristic of FIG. 11 shows the AD conversion value corresponding to the magnetic force level measured by changing the distance d from the side of the apparatus to the window opening / closing detection magnet 14 in the range of d = 0 to 24 mm in the installation state of FIG. ing.

  In such characteristics, for example, if a magnet arrangement with d = 20 mm is planned, a magnetic force level Vs corresponding to the point P at this time is obtained. Subsequently, a value lower by the magnetic force level Vs predetermined ratio α is set as the determination threshold value TH.

  FIG. 12 is a flowchart showing the window opening / closing registration process of the present embodiment by the processor of FIG.

  In FIG. 12, when the power is turned on by mounting the battery 44 in the state where the setting in the measurement environment as shown in FIG. 9 is completed, initialization processing and self-diagnosis processing are executed in step S1, and there is no abnormality. For example, the process proceeds to step S2, and the data stored in the nonvolatile memory 68 is read.

  Subsequently, in step S3, data including the rank information 86 and the rank table 88 is read from the nonvolatile memory 68, and in step S4, the set gain is obtained by referring to the rank table 88 by the rank information 86. In step S5, the gain of the amplifier circuit 52 is changed so that the set gain is obtained. At this time, the amplification gain of the amplifier circuit 54 is similarly changed.

  Subsequently, at step S6, the presence / absence of the window opening / closing registration mode is determined. For example, when the setting of the window opening / closing registration mode by turning on the registration switch 60 is determined, the process proceeds to step S7, and the red LED 56a blinks. The magnetic force level Vs detected by the opening / closing detection hall sensor 46 is read, and if it is determined that it is equal to or higher than the effective level in step S9, the process proceeds to step S10 and the magnetic force level Vs is initially registered in the nonvolatile memory 68.

  As actual processing in steps S8 to S10, the magnetic force level is fetched a plurality of times, and when the effective level is exceeded continuously for a predetermined number of times, the finally obtained magnetic force level Vs is initially registered in the nonvolatile memory 68. To do.

  Subsequently, the window opening / closing detection threshold value TH is calculated as a value lower by a predetermined ratio than the initially registered magnetic force level Vs and registered in the nonvolatile memory 68. When such a series of window opening / closing registration processing is completed, the green LED 56b is turned on in step S12 to notify the completion of registration, and the processing ends.

  FIG. 13 is a flowchart showing the monitoring process of this embodiment by the processor of FIG.

  In FIG. 13, when the power is turned on by mounting the battery 44 in the state where the on-site installation as shown in FIG. 4 is completed, initialization processing and self-diagnosis processing are executed in step S21. If there is no abnormality, step S22 is executed. , The data including rank information 68, rank table 88, magnetic force level Vs of window opening / closing monitoring and determination threshold value TH stored in the nonvolatile memory 68 is read.

  Subsequently, in step S23, the set gain is obtained by referring to the rank table 88 based on the rank information 86, and the amplification gains of the amplifier circuits 52 and 54 are changed so as to become the set gain.

  Subsequently, the process proceeds to step S24, where it is determined whether or not the lock monitoring registration mode is set. When the setting of the lock monitoring registration mode is determined by opening the cover member 24 and turning on the registration switch 60, the process proceeds to step S25 and lock detection is detected. The lock monitoring registration process including initial registration of the magnetic force level by the hall sensor 48 and registration of a determination threshold for detecting locking and unlocking of the crescent lock 16 is executed.

  Subsequently, in step S26, 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 S27 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 S28, 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 S29, a lock monitoring process is executed, and when unlocking or subsequent locking is determined, a message indicating the content is transmitted to the monitoring device. Subsequently, in step S30, it is determined whether the periodic notification time has elapsed. If it is determined that the elapsed time has elapsed, the process proceeds to step S31, where a periodic notification process for transmitting a periodic notification message to the monitoring device is performed.

  In the above embodiment, a program for executing the window opening / closing registration process is downloaded from a personal computer for support and executed. However, the program is stored in advance in the ROM of the processor 50 or the externally connected volatile memory 68. You may make it run.

  As another method of the window opening / closing registration process, the output voltage of the amplification circuit 54 provided in the window opening / closing detection device 10 is measured with a voltage measuring device, and then AD conversion is performed to obtain a magnetic force level Vs, which is used with a lighter. Then, it may be written in the nonvolatile memory 68 together with the determination threshold value TH.

  In the above embodiment, the determination threshold TH is obtained by initial registration of the magnetic force level Vs including the offset of the Hall sensor, but the offset of the Hall sensor is measured and stored in the nonvolatile memory. When calculating the determination threshold value from the initially registered magnetic force level Vs, the magnetic force level change amount is accurately obtained by subtracting the offset from the magnetic force level, a value lower by a predetermined ratio is obtained from this change amount, and the offset is added to this value. The determination threshold value TH may be used.

  Further, in the above embodiment, both the opening / closing monitoring of the window and the unlocking monitoring of the crescent lock are performed, but the present invention can be applied as it is to a window opening / closing detection device that only monitors the opening / closing of the window. The present invention can also be applied to the unlocking monitoring side of the crescent lock. Further, the registration process based on the rank of the magnetic sensing element of the present invention may be performed after installation in the use environment.

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

Explanatory drawing which showed the installation state of the window opening / closing detection apparatus by this invention Assembly exploded view showing an embodiment of a window opening and closing detection device according to the present invention Explanatory drawing which showed the state which removed the cover member from the apparatus main body about the window opening / closing detection apparatus by this embodiment Explanatory drawing which showed the relationship between a hall sensor and a magnet in the installation state of FIG. Explanatory drawing which showed the relationship between a hall sensor and a magnet in the installation state in which the opening and closing of the window was reversed with respect to FIG. The block diagram which showed the circuit structure of the window opening / closing detection apparatus by this embodiment 6 is a circuit diagram showing details of the window opening / closing detection hall sensor and amplifier circuit provided in FIG. Explanatory drawing which showed the rank table stored in the non-volatile memory of FIG. Explanatory drawing showing the arrangement of magnets and hall sensors in the initial registration of the magnetic level of window opening and closing monitoring performed in the measurement environment such as the adjustment process The graph which showed the AD conversion characteristic of the magnetic force level detection signal by the AD conversion port of FIG. The graph which showed the relationship of the magnetic force level detected with the Hall sensor with respect to the distance from the apparatus side surface to a magnet in this embodiment The flowchart which showed the window opening / closing registration process performed by the processor of FIG. 6 in the measurement environment of FIG. The flowchart which showed the window opening / closing detection process of this embodiment by the processor of FIG.

Explanation of symbols

10: Window open / close detection device 14: Window open / close detection magnet 16: Crescent lock 18: Open / close lever 20: Crescent lock detection magnet 22: Device main body 24: Cover member 46: Hall sensor 48 for detecting window opening / closing 48: Hall sensor 56 for lock detection : Display unit 74: Window opening / closing registration processing unit 76: Gain control unit 78: Locking registration processing unit 80: Window opening / closing monitoring unit 82: Locking monitoring unit 84: Communication control unit

Claims (3)

A magnetic sensing element for detecting a magnetic force level by a magnet arranged inside the apparatus and arranged on the monitoring object side;
A window opening and closing monitoring unit that determines the state of the monitoring object by comparing the magnetic force level detected by the magnetic detection element and a predetermined determination threshold;
In a window opening / closing detection device comprising:
Detects the magnetic force level by a magnet actually used in combination arranged at a predetermined distance in a predetermined measurement environment and initially registers it in the nonvolatile memory, and obtains the determination threshold based on the initially registered magnetic force level and registers it in the nonvolatile memory A window opening / closing detection apparatus comprising a registration processing unit for performing the above-described processing.
In the window opening and closing detection device according to claim 1,
An amplification circuit capable of changing the gain by external control for amplifying the output signal of the magnetic sensing element;
A rank table storing the relationship between the rank information set according to the output characteristics of the magnetic sensing element and the gain of the amplifier circuit;
A gain control unit that changes the gain of the amplifier circuit so as to be a gain obtained from the rank table based on rank information of the magnetic sensing element at the time of starting the device;
A window open / close detection device comprising:
  2. The window opening / closing detection apparatus according to claim 1, wherein the magnetic detection element is a Hall sensor.

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