JP2002312880A - Burglarproof sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to easily confirm a set address by visual recognition with respect to a burglarproof sensor which communicates with a security device in a polling system. SOLUTION: When display of the set address is indicated from a security device 10, a main control part 4 flickers respective bit values of a bit string indicating the address set by an address set switch 2 on a display part 3 in a prescribed order by a prescribed time at duty ratios preliminarily determined in accordance with bit values to display the set address. For example, a bit value is flickered on the display at 10% duty ratio in the case of bit value '1', and a bit value is flickered on the display at 50% duty ratio in the case of bit value '0'. After flickering bit values on the display at duty ratios corresponding to respective bit values in order from the most significant bit to the least significant bit, the main control part 4 repeats this flickering display from the most significant bit to the least significant bit after a prescribed interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security sensor for communicating with a security device by a polling method.

[0002]

2. Description of the Related Art Security sensors for performing communication with a security device by a polling method have been widely known. In a security system using such a security sensor, multiplex transmission for performing communication by a polling method is performed from the security device. A line is laid, and a plurality of security sensors are connected to the multiplex transmission line. Each of the security sensors connected to the multiplex transmission line is set with a unique address different from each other.

[0003] The security device periodically accesses each security sensor in a predetermined order, for example, the order of addresses, and notifies the security sensor of a message. Each security sensor receives a message addressed to its own address. And returns a response corresponding to the control command included in the message notified from the security device. For example, if the message notified from the security device includes a control command for inquiring whether or not the sensor has been issued, the security sensor issues an alert from the previous access from the security device to the current access. If so, a message containing data with a report is returned, and if there is no report, a message containing data without a report is returned.

[0004]

The address of the security sensor is set by turning on and off each address setting switch having a plurality of switches such as a dip switch. This address setting is usually performed before installing the security sensor, but after installing the security sensor, it is required to confirm whether the address of each security sensor is correctly set as determined. There is. Further, when there is some trouble while the security system is actually operated, it may be desired to confirm the address of each security sensor. To check the address of the security sensor in this way, turn on each of the address setting switches,
Since the address setting switch is provided inside the security sensor, it is necessary to remove the cover of the security sensor and check the on / off status of each switch of the address setting switch. It becomes troublesome work. In addition, since the security sensor is usually installed at a location that is out of reach of the ceiling and the wall, the work of confirming the address of the security sensor is also troublesome in this respect.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a security sensor capable of easily confirming a set address visually and thereby simplifying the operation of address confirmation.

[0006]

In order to achieve the above object, a security sensor according to claim 1 is a security sensor for communicating with a security device by a polling method, and includes a plurality of security sensors for setting an address. An address setting switch comprising a switch, a display unit, and a control unit for displaying an address set by the address setting switch on the display unit when an address display is instructed by a message from the security device. Features. The security sensor according to claim 2 is the security sensor according to claim 1, wherein the display unit includes one light-emitting element, and the display of the address is performed by each bit value of a bit string indicating an address set by an address setting switch. Are performed by blinking the light-emitting elements constituting the display unit at a predetermined duty ratio in accordance with the bit value in a predetermined order and at predetermined time intervals.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a security sensor according to the present invention. In the figure, S is a security sensor, L is a multiplex transmission line for performing polling communication, 1 is a sensor head, and 2 is an address setting. A switch 3, a display unit 4, a main control unit 5, and a communication control unit 5 are shown.

The sensor head 1 detects a predetermined state. When the security sensor S is a heat ray sensor, the sensor head 1 performs a predetermined process on the pyroelectric element and an output signal of the pyroelectric element, and performs a predetermined process. When the state is detected, the processing circuit outputs an alarm signal, and an optical system including a reflecting mirror for forming an alert zone is provided. Since the configuration of such a sensor head 1 is well known, a detailed description is omitted.
Here, for convenience, all security sensors S are assumed to be heat ray sensors, but it is obvious that other sensors such as sensors for detecting opening and closing of windows and doors may be used. Therefore, here, when the sensor head 1 detects the movement of the object radiating the heat ray (hereinafter, simply referred to as the movement of the object), the sensor head 1 outputs an alarm signal indicating that the object has been detected to the main control unit 4.

The address setting switch 2 is for setting the address of the security sensor S. Here, the address setting switch 2 is constituted by a dip switch having three switches, and by setting these three switches as shown in FIGS. 7 shall be set. In FIG. 2, it is assumed that the switch indicated by “1” is the least significant bit and the switch indicated by “3” is the most significant bit, and the on (ON) position of each switch is a bit value 0, and the off (OFF) position is Has a bit value of 1. As described above, the address setting by the address setting switch 2 is performed before the security sensor S is installed at a predetermined location such as a ceiling. The display unit 3 includes one appropriate light-emitting element such as an LED, and is provided at a place visible from the outside of the security sensor S.

The main control unit 4 is composed of a processing unit including a CPU and its peripheral circuits, and manages the operation of the security sensor S in an integrated manner. When an address is set by the address setting switch 2 and is set at a predetermined location and turned on,
The main control section 4 reads the ON / OFF state of each switch of the address setting switch 2 at the stage of the start-up processing, recognizes an address assigned to itself, and stores the address in an internal memory (shown in FIG. 1). ) And notifies the communication control unit 5 of the address. Other operations of the main control unit 4 will be described later.

The communication control unit 5 is for performing communication by polling with a security device (not shown in FIG. 1). Then, as described above, the communication control unit 5 is notified of the address set by the address setting switch 2 from the main control unit 4, and the communication control unit 5 stores the address.
Then, when a message is passed from the main control unit 4 and transmission is instructed, the communication control unit 5 performs a process of transmitting the message to the multiplex transmission line L. Further, the communication control unit 5 receives a message sent from the security device or another security sensor to the multiplex transmission line L, identifies a destination address included in the received message, and determines whether the destination address is not its own address. Ignores the message and if the destination address is its own address,
A process of passing the received message to the main control unit 4 is performed.

FIG. 3 shows an example of a format of a message transmitted by the security device and the security sensor S. The source address of the message is written in the source address. The destination address of the message is written in the destination address. Various commands such as control commands for the destination device are written in the command section. Various data to be notified to the destination are written in the data section.

FIG. 4 shows an example of the configuration of a security system using the security sensor S as described above. In FIG. 4, S _{1 to} S
_N is a security sensor, L is a multiplex transmission line, 10 is a security device,
Reference numeral 11 denotes a main control unit, 12 denotes a communication control unit, 13 denotes a line control unit, 14 denotes a mode switch, 15 denotes an operation device, and 16 denotes a public telephone line. In FIG. 4, N security sensors are connected. However, since the address setting switch 2 of the security sensor S is composed of three switches as shown in FIG. The maximum number of security sensors S that can be connected to is eight. Therefore,
In FIG. 4, N is 8 or less. Note that FIG. 4 shows only one loop of the security sensor, but this is to avoid complicating the drawing, and in general, a plurality of loops of the security sensor can be connected. is there.

[0014] A main control unit 11 is composed of a processing unit including a CPU and its peripheral circuits, which manages oversees the operation of the security device 10, connected to the intrusion detection sensor is S ₁ to S _N Is registered in advance. The main controller 11 also registers an address as a security device. The operation will be described later.

The communication control unit 12 includes security sensors S _{1 to} S _N
When a message is passed from the main control unit 11 and transmission is instructed, a process of sending the message to the multiplex transmission line L is performed. Further, the communication control unit 12 controls the multiplex transmission line L
Upon receiving the message sent above, the destination address is identified. If the destination address is not its own address, the message is ignored. If the destination address is its own address, the received message is sent to the main control unit. 11 is passed.

The line control unit 13 is connected to a center device located at a security center or the like of a security company and a public telephone line 16.
It is for performing communication via. The mode switch 14 is for setting an operation mode of the main control unit 11. Here, the main control unit 11 includes a security mode for performing normal security processing and security sensors S _{1 to SN.}
It is assumed that two operation modes of an address confirmation mode for confirming the address are defined.

An operation device 15 is also connected to the main control unit 11. The operation device 15 includes security sensors S _{1 to} S
_N is for switching the guard state for the guard area in which _N is provided, that is, for switching from the guard state to the released state, or for switching from the released state to the guard state. In FIG. 4, the operation device 15 is separate from the security device 10, but may be integrated.

The operation will be briefly described below. [Operation in Security Mode] The operation in the case where the security mode is set by the mode switch 14 of the security device 10 is the same as that of the related art.

The sensor head 1 of each security sensor S is constantly operating, and outputs an alarm signal to the main controller 4 when detecting the movement of an object. When receiving the alarm signal from the sensor head 1, the main controller 4 stores the number of times the alarm signal has been received (hereinafter, referred to as the number of alarms) in an internal memory (not shown in FIG. 1). Thus, the main control unit 4 of the security sensor S
Stores the data to be sent to the security device 10 from the previous access from the security device 10 to the next access from the security device 10.

The main controller 11 of the security device 10 periodically accesses the security sensor by transmitting messages to the security sensor in a predetermined order, for example, in the order of the addresses of the security sensors S _{1 to SN} . For example, assuming now that the security sensor S at the address 0 is accessed, the main control unit 1 of the security device 10
1 designates its own address as the transmission source address and the destination as address 0, writes a control command for inquiring whether or not there is an alarm in the command section, generates a message, and instructs the communication control section 12 to transmit. At this time, the message does not have to have a data portion. And the main control unit 1
After instructing the transmission of a message, 1 waits for a reply message from the security sensor at address 0, which is the destination.

Communication control section 5 of security sensor at address 0
Receives this message, it passes it to the main controller 4 because the destination address is its own address. Main control unit 4
Interprets the control command written in the command part of this message, and recognizes that the command is a control command for inquiring whether or not there is an alarm, and sets its own address as the source address and the destination as the address of the security device 10, and If there is a report, a command indicating the presence of a report is written in the command section, and the number of reports written in the internal memory is further written in the data section, a reply message is generated and transmitted to the communication control section 5. To instruct. If there is no alert, only the command indicating no alert need be written in the command part of the reply message, and the data part may not be added.

This reply message is received by the communication control unit 12 of the security device 10 and passed to the main control unit 11. After collecting data from the security sensor at address 0 in this way, the main control unit 11 next sends a message to the security sensor at address 1. Thus, the security sensor at address 1 is accessed. Similarly, the main control unit 11 of the security device 10 sets the security sensor S ₁
To _SN sequentially to collect data. And
The main control unit 11 of the security device 10 determines that an abnormal situation has occurred when it detects that the security sensor S installed in the security area in the security state is alerted by the operation device 15, and determines that an abnormal situation has occurred. Generates data to indicate that an event has occurred,
The transmission is transmitted to the center device by the line control unit 13. This is an abnormal notification.

The above is a typical process in the security mode. When the main control unit 11 of the security device 10 is set to perform the periodic notification, the line control unit 13 transmits data indicating the periodic notification at a predetermined time or at a predetermined time interval. Send to center device.

The main control unit 11 of the security device 10 includes:
It is normal to set a case where not only an abnormality report and a regular report, but also a report to the center device is made, but the operation in the security mode is not an essential matter in the present invention. The description of the report is omitted.

[Operation in Address Confirmation Mode] Next, the operation when the address confirmation mode is set by the mode switch 14 of the security device 10 will be described. The operation in the address confirmation mode is a unique operation in the security sensor according to the present invention.

Each security sensor S₁ ~ S_N Is set to
If the operator wants to confirm the address,
Operate the mode switch 14 to set the address confirmation mode.
Set. When the address confirmation mode is set, the main control
The unit 11 includes each security sensor S₁ ~ S _N In a predetermined order
First, a control command to display the set address is included.
Send a message. For example, if the message is
When transmitting to the security sensor S of the dress 0, the security device
The main control unit 11 of its own 10 stores its own address in the source address.
Address, set the destination to address 0, and instruct the display of the set address
Write the control command to
Is generated and passed to the communication control unit 12 to instruct transmission, and
It waits for a response from the security sensor for dress 0. In addition, this
In the case of, there is no need to add a data part to the message
No.

Communication control unit 5 of security sensor at address 0
Receives this message, it passes it to the main controller 4 because the destination address is its own address. Main control unit 4
Interprets the control command written in the command part of this message, and recognizes that the display of the set address has been instructed, generates a reply message to the security device 10 and passes it to the communication control unit 5 to instruct transmission. I do. The address 0 may be written in the source address of this reply message, the address of the security device 10 may be written in the destination address, and a command indicating that the instruction has been recognized may be written in the command portion. It is not necessary to attach a data part to this reply message.

This reply message is received by the communication control unit 12 of the security device 10 and passed to the main control unit 11. When the reply message is received from the security sensor at address 0 in this way, the main control unit 11 next proceeds to address 1
The same message is transmitted to the security sensor. As a result, the main controller 4 of the security sensor at address 1 is instructed to display the set address. Similarly,
The main control unit 11 of the security device 10 sequentially accesses the security sensors S _{1 to SN} and instructs the display of the set address.

The operation of the main control unit 4 of each of the security sensors S _{1 to SN} when the display of the set address is instructed is as follows. In this case, the main control unit 4 displays the set address in a bit string indicating the address set by the address setting switch 2, that is, in this case, a three-bit indicating the address stored in the internal memory of the main control unit 4. Is performed by blinking the display unit 3 at a predetermined duty ratio in accordance with the bit value in a predetermined order at predetermined time intervals.

Here, the least significant bit, the second bit,
In the order of the most significant bit, blinking display is performed sequentially for 1 second each. When the bit value is “1”, the blinking display is performed at a duty ratio of 10%, and when the bit value is “0”, the duty ratio is 50%. Flashing display. Therefore, when the bit value is “1”, as shown in FIG. 5A, the display unit 3 is turned on for the first 100 msec for 1 sec, and is turned off for the remaining 900 msec. This is a blinking display with a duty ratio of 10%. The bit value is “0”
In the case of (1), as shown in FIG.
The light is turned on for the first 500 msec during c, and is turned off for the remaining 500 msec. This is a blinking display with a duty ratio of 50%.

Then, the main control unit 4 performs blinking display according to the bit value of the least significant bit during the first 1 second, and blinks according to the bit value of the second bit during the next 1 second. When the blinking display according to the bit value of the most significant bit is performed in the next 1 second, the blinking display from the bit value of the least significant bit to the bit value of the most significant bit is performed again after a predetermined time interval, Repeat interval. This display of the set address is repeated until the security device 10 instructs the stop of the display of the set address. Therefore, in the security sensors S of the addresses 0 to 7, the displays as shown in FIGS. 6A to 6H are performed, respectively. In FIG. 6, the interval is 2
sec.

As described above, in the address confirmation mode, the blinking display corresponding to each bit value of the bit string indicating the set address is performed on the display unit 3, so that the blinking state of the display unit 3 is observed. Thus, it is not necessary to remove the cover of the security sensor S and check the state of each switch of the address setting switch 2 as in the related art.

When the address confirmation is completed, the mode switch 14 is operated to set the security mode. Security device 10
When the main control unit 11 detects that the operation mode has been switched from the address confirmation mode to the security mode, the main control unit 11 generates a message in which a control command indicating stop of the set address display is written in the command unit, and all the security sensors S
_{1 to SN} . The transmission of this message to all the security sensors S _{1 to SN} is the same as the transmission of a message including a control command instructing the display of the set address.

When each of the security sensors S _{1 to} S _N recognizes this message, it sends a reply message to the security device 10. Then, when the main control unit 11 of the security device 10 receives a reply message to a message including a control command instructing to stop the display of the set address from all the security sensors S _{1 to SN} , the main control unit 11 enters the security mode. When the main control unit 4 of each of the security sensors S _{1 to SN} receives a message instructing to stop the display of the set address,
The operation of displaying the set address is completed, and the operation in the security mode is started.

As described above, when it is necessary to confirm the address set in each security sensor for some reason, an address confirmation mode is set and each security sensor at that time is set. Only by observing the blinking state of the display unit 3, it is possible to confirm whether or not the address set at the time of designing the security system is set.
If there is a security sensor with an incorrectly set address, the address setting switch 2 of the security sensor S may be operated to set a predetermined correct address.

As described above, one embodiment of the present invention has been described, but the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, the display unit 3 of the security sensor S is dedicated to display the set address. However, when the security sensor S is provided with a light emitting element such as an LED for various purposes. Can use those light emitting elements for displaying a set address. For example, conventionally, a security sensor including a light-emitting element that is lit for a predetermined time when an object is detected is known. In such a security sensor, the light-emitting element is set to display a set address in an address confirmation mode. It is possible to use it for. The blinking display by the display unit 3 is not limited to the one shown in FIG. In short, it suffices to blink at a duty ratio such that the case where the bit value is “1” and the case where the bit value is “0” can be clearly distinguished.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a security sensor according to the present invention.

FIG. 2 is a diagram illustrating a mode of address setting when the address setting switch 2 is configured by a dip switch including three switches.

FIG. 3 is a diagram illustrating an example of a format of a message transmitted by the security device and the security sensor.

FIG. 4 is a diagram showing a configuration example of a security system using the security sensor S shown in FIG.

FIG. 5 is a diagram showing an example of blinking display for setting address display.

FIG. 6 is a diagram showing an example of display of set addresses when the addresses are 0 to 7;

[Description of Signs] S: security sensor, L: multiplex transmission line, 1: sensor head, 2: address setting switch, 3: display unit, 4: main control unit, 5: communication control unit, 10: security device, 11 ... Main control unit, 12 ... Communication control unit, 13 ... Line control unit, 14 ... Mode switch, 15 ... Operation device, 16 ... Public telephone line.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5C084 AA02 AA07 BB13 BB40 DD01 EE01 FF03 FF13 FF27 GG45 GG52 GG80 5C087 AA03 AA13 BB03 BB32 BB51 BB65 BB74 DD05 DD23 DD25 DD26 DD27 DD29 FF20 FF20 FF19 FF20FF GG32 GG57 GG86

Claims (2)

[Claims] 1. A security sensor for communicating with a security device by a polling method, comprising: an address setting switch comprising a plurality of switches for setting an address; a display unit; and displaying an address by a message from the security device. And a control unit for displaying the address set by the address setting switch on the display unit when the instruction is given. 2. The display section comprises one light-emitting element, and displays an address by displaying each bit value of a bit string indicating an address set by an address setting switch in a predetermined order for a predetermined time. 2. The security sensor according to claim 1, wherein the detection is performed by blinking the light-emitting elements constituting the display unit at a predetermined duty ratio in accordance with the bit value.