JP2000048287A - Invasion detecting sensor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure easiness in construction and maintenance and to surely transmit power supply cutoff information to the side of a security center concerning a wireless type invasion detecting sensor device. SOLUTION: Concerning a wireless type invasion detecting sensor device 1 to be operated while receiving the supply of power from a commercial power source 5, a capacitor 8 for emergency power source is charged with a DC voltage V from a power source part 7 at all the time and when the supply of an AC voltage E is stopped, power required for operating the invasion detecting sensor device 1 is supplied from the capacitor 8 for emergency power source. At the same time, a power supply cutoff signal OFF showing the stop of supply of the AC voltage E from a radio communication part 4 is sent out by radio while the invasion detecting sensor device 1 is operated by power from the capacitor 8 for emergency power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless intrusion detection sensor device used for detecting an intruder in a mechanical security system or the like.

[0002]

2. Description of the Related Art For example, in order to perform nighttime security in office buildings, factories, etc., door sensors,
Glass breakage sensors, intrusion detection sensor devices including various sensors such as human body detection sensors using far-infrared rays generated from the human body are arranged in various places in the security area,
When the provided intrusion detection sensor device issues an alert, the alert signal is sent to the emergency alert device wirelessly or by wire, and it is determined that someone has entered the security area. There is known a security system that sends intrusion information via a line, a dedicated telephone line, or the like.

By the way, in order to transmit each output of various intrusion detection sensor devices disposed in a building or the like to a security transmitter or the like installed in the building, various output signals from the intrusion detection sensor device are transmitted. Is sent to the security transmitter by either a wired method or a wireless method, but when the output from the intrusion detection sensor device is transmitted by using the wireless method, the transmission between each intrusion detection sensor device and the security transmitter is performed. Since the wiring work is not required, there is an advantage that the work of installing the mechanical security system is simplified and the appearance is good.

[0004]

However, the conventional wireless transmission type intrusion detection sensor device is configured to operate using a battery set inside the case as a power source. Therefore, maintenance work is required to replace the battery periodically, and when using a large number of intrusion detection sensor devices as in the security business, the battery must be replaced before the battery is exhausted. There is a problem that a great deal of labor and cost are required to perform it reliably.

In order to avoid this problem, it is conceivable to employ an AC power supply system in a wireless intrusion detection sensor device. However, when the AC power supply method is adopted, another problem that the function of the intrusion detection sensor device is stopped due to a power failure or an intruder turning off the power, thereby significantly reducing the reliability of the system. Occurs.

It is an object of the present invention to provide a wireless type intrusion detection sensor device which can solve the above-mentioned problems in the prior art.

[0007]

A feature of the present invention for solving the above-mentioned problems is that in an intrusion detection sensor device adapted to transmit intrusion detection information by a wireless method, a sensor unit for detecting intrusion, A wireless transmission unit for wirelessly transmitting an intrusion alarm signal in response to intrusion detection in the sensor unit, a power supply unit for receiving AC power from a commercial power supply and supplying necessary DC power to each unit, A detection unit for detecting whether or not the supply of the AC power is stopped; and a power supply capacitor charged by the DC power, wherein the operation of the intrusion detection sensor device is performed when the supply of the AC power is stopped. Power from the power supply capacitor, and supply of the AC power from the wireless communication unit during a period in which power from the power supply capacitor is supplied. Certain power down signal indicating that the locked in that as sent wirelessly.

[0008] The power supply unit receives the supply of commercial power, and supplies DC power necessary for the operation of the sensor unit and the wireless communication unit, whereby the intrusion detection sensor device enters an operating state. In this state, when an intrusion is detected in the sensor unit, an intrusion alarm signal is wirelessly transmitted from the wireless transmission unit.

The sensor section may be constituted only by a switch having an on / off contact such as a door switch, or an infrared ray configured to open or close a relay contact by detecting far infrared rays emitted from a human body. It may be configured as a sensor. That is, the sensor unit can be appropriately configured using any known intrusion detection sensor.

[0010] When the supply of AC power to the power supply unit is stopped due to a power outage or an illegal power off or removal of a device, even if no DC power is supplied from the power supply unit, the power supply unit is replaced with this. DC power is supplied from a power supply capacitor to each part of the device. As a result, the backup operation mode is set for ensuring the operation of the intrusion detection sensor device for a predetermined time. At this time, a power-off signal is output from the detection unit, and the wireless transmission unit wirelessly transmits the power-off signal within the predetermined time. That is, in the present apparatus, when an abnormal state occurs in the power supply unit such as a power-off, at least the occurrence of the abnormal state can be wirelessly transmitted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of an embodiment of an intrusion detection sensor device according to the present invention. The intrusion detection sensor device 1 is installed at an appropriate location in a building (not shown) that is subject to mechanical security, detects an intrusion from the outside, and wirelessly transmits an intrusion alarm signal. The receiver 2 is located away from the intrusion detection sensor device 1 and can receive an intrusion alarm signal. The receiving device 2 may be installed in the same building, but is not necessarily limited to this.

The intrusion detection sensor device 1 includes a sensor unit 3 for detecting intrusion and an identification code ID in response to an intrusion detection signal 3A output from the sensor unit 3 upon detection of intrusion.
The wireless intrusion detection sensor device includes a wireless transmission unit 4 for wirelessly transmitting 3A as an intrusion alarm signal to the receiving device 2. The wireless transmission unit 4 outputs an ID code corresponding to the input signal.
And a radio transmission circuit 42 that outputs a radio transmission signal containing the identification code from the ID assignment circuit 41. The radio transmission signal is transmitted from the antenna 43. The intrusion detection signal 3A from the sensor unit 3 is input to the ID assignment circuit 41,
Here, the identification code ID3A indicating intrusion detection is sent to the wireless transmission circuit 42, and the identification code ID3A is transmitted from the wireless transmission unit 4.
An intrusion alarm signal containing A is output as a wireless transmission signal.

In order to cover the DC power used in each unit of the intrusion detection sensor device 1 such as the sensor unit 3 and the wireless transmission unit 4, the intrusion detection sensor device 1 uses an AC voltage from an external commercial power supply 5 via a power cable 51. E is taken in, and the taken-in AC voltage E is input to the power supply unit 7 via the load current monitoring unit 6. The power supply unit 7 rectifies the AC voltage E and outputs a stabilized DC voltage V at a required level.
The DC voltage V is supplied to the sensor unit 3, the wireless transmission unit 4, and the load current monitoring unit 6.

Reference numeral 8 denotes a backup emergency power supply capacitor for the power supply unit 7 which is charged by the DC voltage V from the power supply unit 7, and when the power supply unit 7 cannot supply the DC voltage V. The DC voltage of substantially the same level as the DC voltage V stored in the emergency power supply capacitor 8 is applied to the sensor unit 3, the wireless transmission unit 4, and the load current monitoring unit 6.
Supplied to

In this embodiment, the DC voltage V is applied to the resistor 9
Is applied to the emergency power supply capacitor 8, whereby the emergency power supply capacitor 8 is constantly charged with the DC voltage V. A diode 10 is connected between the positive terminal of the emergency power supply capacitor 8 and the positive output terminal 7A of the power supply unit 7 with the polarity shown. Therefore, when the supply of the AC voltage E to the power supply unit 7 is stopped for some reason and the level of the DC voltage V decreases, the electric charge stored in the emergency power supply capacitor 8 flows to the load side via the diode 10. Will be. That is, mischief, work,
When the power supply from the commercial power supply 5 to the intrusion detection sensor device 1 is stopped due to the removal of the intrusion detection sensor device 1 or for other reasons, and the supply of the DC voltage V from the power supply unit 7 is stopped, the emergency Power supply capacitor 8
The power supply is automatically switched so that DC power is supplied to each load from the power supply. Thereby, the intrusion detection sensor device 1 is in a backup operation mode in which the emergency power supply capacitor 8 operates in the event of a power failure or the like, and a required operation can be secured for a predetermined time, for example, about several tens seconds to several minutes. Has become.

The load current monitoring unit 6 disconnects the power supply due to a power failure, disconnection of the power cable 51 by an intruder, mischief, or the like, and the supply of the AC voltage E from the commercial power supply 5 to the intrusion detection sensor device 1 is interrupted. When the power is restored, a power-off signal is output and a power-off signal is output when the power is restored.

Referring to FIG. 2, the load current monitoring unit 6
A current transformer 61 for detecting a load current flowing through the power cable 51 and a detection voltage ED which is a DC voltage having a level proportional to an AC load current value consumed by the power supply unit 7 based on an output from the current transformer 61 are output. And a current-voltage conversion circuit 62. 63 compares the level of the detection voltage ED with a predetermined reference voltage RF, and when the detection voltage ED is lower than the reference voltage RF, the power-off signal O
This is a first comparison circuit that outputs an FF. Reference numeral 64 denotes a level comparison between the detection voltage ED and the reference voltage RF, and when the detection voltage ED is higher than the reference voltage RF, the power supply signal ON
Is output from the second comparison circuit.

Power-off signal OFF and power-supply signal ON
Is input to the ID assignment circuit 41 of the wireless transmission unit 4.
In response to the input of the power-off signal OFF, the ID assignment circuit 41 sends an identification code IDOFF indicating power-off to the wireless transmission circuit 42, and the wireless transmission circuit 42 sends the identification code IDO.
The power-off signal containing the FF is wirelessly transmitted to the receiving device 2
Sent to Similarly, the ID assigning circuit 41 responds to the input of the power supply signal ON by the identification code ID indicating the power restoration.
ON is transmitted to the wireless transmission circuit 42, and a power supply signal including the identification code IDON is transmitted from the wireless transmission circuit 42 to the receiving device 2 by wireless.

The receiving device 2 receives a radio wave from the radio transmitting unit 4, and responds to a reception output from the receiving unit 21 to transmit the identification code received at that time via the telephone line 22. And an emergency notification device 23 for sending to the security center 24. Since the configuration of the receiving device 2 is known, the detailed description of the configuration of the receiving device 2 will be omitted here.

Next, the operation of the intrusion detection sensor device 1 will be described with reference to FIGS.

When the AC voltage E is supplied from the commercial power supply 5 to the intrusion detection sensor device 1, the DC voltage V is output from the power supply unit 7 and the diode 10 is in a reverse bias state. The device 1 is in an operation state by the DC voltage V. In this state, the power-off signal OFF is not output, and when the sensor unit 3 is not operating (intrusion is not detected), both the intrusion alarm signal and the power-off signal are transmitted from the wireless transmission unit 4. It has not been sent.

The wireless transmission section 4 responds to the power supply signal ON inputted at this time, and the intrusion detection sensor device 1 is in a normal operation state at predetermined fixed time intervals (for example, every 10 minutes). Is transmitted to the receiving device 2 wirelessly. The receiving device 2 checks whether or not the operation confirmation signal has been received at predetermined constant intervals. If the receiving device 2 does not receive the operation confirmation signal at a predetermined fixed interval, it is determined that an abnormality has occurred in the intrusion detection sensor device 1 and the security center 24 is notified of the fact. Configuration.

When an intrusion is detected by the sensor unit 3 when the intrusion detection sensor device 1 is in a normal operation state, a sensor output signal 3A is input from the sensor unit 3 to the ID assigning circuit 41, which indicates the intrusion detection. The identification code ID3A is sent to the wireless transmission circuit 42, and the wireless transmission unit 4 outputs an intrusion alarm signal containing the identification code ID3A. Upon receiving the intrusion alarm signal, the receiving device 2
Then, the identification code ID3A is sent to the security center 24 through the security center 2.

On the other hand, if the power supply cable 51 is cut off by an intruder or the power supply is cut off due to a power failure, mischief, or the like, the supply of the AC voltage E to the intrusion detection sensor device 1 is stopped, the level of the DC voltage V decreases. As a result, the diode 10 becomes forward biased, and the intrusion detection sensor device 1
Is switched from the normal operation mode using the DC voltage V to the backup operation mode using the output voltage of the emergency power supply capacitor 8. The duration of this backup operation mode depends on the capacity of the emergency power supply capacitor 8, and can be, for example, about several tens seconds to several minutes.

When the intrusion detection sensor device 1 enters the backup operation mode due to the disconnection of the power cable 51 or the like, the level of the detection voltage ED output from the current-voltage conversion circuit 61 becomes substantially zero. The power cut-off signal OFF is output from the unit 6, and the identification code IDOFF indicating the power cut-off signal is transmitted from the wireless transmission unit 4 as the power cut-off signal during the predetermined period. When the supply of power from the emergency power supply capacitor 8 ends, that is, when the above-described predetermined period has elapsed, the operation of the intrusion detection sensor device 1 stops.

If the power is restored, the intrusion detection sensor device 1 returns to the normal operation with the DC voltage V again, and at this time, the power supply signal ON is output from the load current monitoring unit 6,
The ID code 41 corresponding to the ID
N is sent to the wireless transmission circuit 42, and a power supply signal containing the identification code IDON is transmitted from the wireless transmission unit 4. Thereby, the receiving device 2 can determine that the operation of the intrusion detection sensor device 1 has been restored.

As described above, since the power supply for the normal operation is secured from the commercial power supply 5 in the intrusion detection sensor device 1, the battery replacement work is not required as compared with the conventional configuration using a battery. Work can be greatly reduced. For this reason, the running cost becomes extremely low.
As described above, according to the intrusion detection sensor device 1, maintenance can be greatly simplified while ensuring simplicity of construction by a wireless method.

In normal operation, electric charges are stored in the emergency power supply capacitor 8, and when power is turned off, the emergency power supply capacitor 8 can be used as a power source to transmit information of power cutoff as security information. Because of the configuration, not only when the intruder or the like stops the sensor function by turning off the power, but also when the intrusion detection sensor device is removed and carried out, even if the power fails for any reason, Since the intrusion detection sensor device 1 itself can transmit the power-off information to the security center 24 side, the security center 24 can always check whether or not the power supply to the intrusion detection sensor device 1 has been cut off, and the reliability is improved. A high mechanical security system can be built.

In this case, since the power supply used for the backup operation mode is constituted by using the emergency power supply capacitor 8, the life thereof is longer than that of a conventionally used battery, so that maintenance work is remarkably performed. Can be reduced. For example, when a primary battery such as an alkaline manganese battery is used, a maintenance defect that periodic replacement is required occurs. However, since the emergency power supply capacitor 8 has a long life, a time interval for maintenance and inspection is long. Good and inexpensive. In particular, when the time of the backup operation mode may be short, a small capacitor is sufficient, which is more advantageous in terms of cost.

Further, when the backup operation mode using the electric power stored in the capacitor is performed only for transmitting the power-off information, the capacity of the emergency power supply capacitor 8 can be extremely small, so that the capacitor can be used. The increase in cost due to the provision is hardly a problem.

[0032]

According to the present invention, as described above, the power supply for the normal operation is secured from the commercial power supply. Work can be greatly reduced. For this reason, the running cost becomes extremely low. As described above, according to the intrusion detection sensor device of the present invention, maintenance can be greatly simplified while ensuring simplicity of construction.

In a normal operation, electric charges are stored in the power supply capacitor, and when the power supply is turned off, the power supply capacitor is used as a power supply, and the information that the power supply is turned off can be wirelessly transmitted as security information. because there is,
The intrusion detection sensor device is not limited to the case where the sensor function is stopped by turning off the power supply, as well as the case where the intrusion detection sensor device is removed and carried out, or if a power failure occurs for any reason. The security center itself can send the power-off information to the security center side, so that the security center can always check whether the power is turned off, and can construct a highly reliable mechanical security system.

The power supply used for the backup operation mode has a long life because it is constituted by using a power supply capacitor. Therefore, for example, when a primary battery such as an alkaline manganese battery is used, a maintenance defect that requires periodic replacement occurs. is there. In particular, when the time of the backup operation mode may be short, a small capacitor is sufficient, which is more advantageous in terms of cost.

Further, in the case where the backup operation mode using the power stored in the power supply capacitor is performed only for transmitting the power-off information, the capacity of the power supply capacitor is extremely small, and therefore, the power supply capacitor is not required. The increase in cost due to the provision of the capacitor hardly causes a problem.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an embodiment of an intrusion detection sensor device according to the present invention.

FIG. 2 is a detailed block diagram of a load current monitoring unit in FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 intrusion detection sensor device 2 reception device 3 sensor unit 3A intrusion detection signal 4 wireless transmission unit 5 commercial power supply 6 load current monitoring unit 7 power supply unit 8 emergency power supply capacitor 21 reception unit 22 telephone line 23 emergency notification device 24 security center 41 ID Assignment circuit 42 Wireless transmission circuit 51 Power cable 61 Current transformer 62 Current-voltage conversion circuit E AC voltage ED Detection voltage IDOFF, IDON, ID3A Identification code OFF Power off signal ON Power supply signal RF reference voltage V DC voltage

Continued on the front page F term (reference) 5C084 AA02 AA07 AA13 BB16 CC02 CC03 CC19 DD42 EE04 EE05 FF02 FF04 FF27 GG02 GG05 GG07 GG09 GG45 GG55 GG56 GG57 GG68 GG75 HH12 HH13 5C087 AA02 CCB DD DD BBCC FF04 FF10 FF14 FF17 FF23 GG08 GG11 GG31 GG32 GG43 GG48 GG66 GG69 GG83

Claims (3)

[Claims] An intrusion detection sensor device configured to transmit intrusion detection information by a wireless method, a sensor unit for performing intrusion detection, and wirelessly transmitting an intrusion alarm signal in response to the intrusion detection in the sensor unit. A power transmitting unit for receiving necessary AC power from a commercial power supply to supply necessary DC power to each unit; and a detecting unit for detecting whether or not the supply of the AC power is stopped. And a power supply capacitor charged by the DC power, and when the supply of the AC power is stopped, power required for operation of the intrusion detection sensor device is supplied from the power supply capacitor, and Wirelessly sending a power-off signal indicating that the supply of the AC power is stopped from the wireless communication unit during a period in which power is being supplied from the capacitor. An intrusion detection sensor device characterized in that: 2. The wireless transmission unit according to claim 1, wherein, in addition to the transmission of the intrusion alarm signal, an operation confirmation signal indicating whether or not the operation state of the device is normal is transmitted at fixed time intervals. The intrusion detection sensor device according to claim 1, wherein: 3. An intrusion detection sensor device in which an intrusion alarm signal is wirelessly transmitted in response to intrusion detection by a sensor unit, wherein the AC power is supplied from a commercial power supply and the necessary DC power is supplied to each unit. A power supply unit for detecting whether or not the supply of the AC power is stopped, a power supply capacitor charged with the DC power, and the power supply unit when the supply of the AC power is stopped. A switching circuit for switching power supply so as to supply power required for operation of the intrusion detection sensor device from the power supply capacitor, wherein the detection unit detects that the supply of the AC power has been stopped. Indicating that the supply of the AC power is stopped during a period in which the intrusion detection sensor device is operated by the power from the power supply capacitor in response to the Intrusion detection sensor device being characterized in that the source disconnection signal as sent wirelessly.