Auxiliary control device for security alarm system

• US 5,801,625 A
• Filed: 04/04/1997
• Issued: 09/01/1998
• Est. Priority Date: 04/04/1997
• Status: Expired due to Fees

• Current Assignee: Wang, Randall
• Original Assignee: Wang, Randall
• Inventors: Wang, Randall
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Pope, Daryl C.
• Application Number:
  US08/835,124
• Time in Patent Office: 515 Days
• Field of Search: 340/506, 340/521, 340/528, 340/529, 340/541, 340/542, 340/545, 340/552, 340/565, 340/825.06, 340/825.31, 340/309.15, 340/692, 250/221, 250/222.1
• US Class Current: 340/506
• CPC Class Codes: G08B 25/008 Alarm setting and unsetting, i.e. arming or disarming of the security system

Abstract

An auxiliary control device for a security alarm system installed in a commercial facility includes a control circuit for bypassing the electrical connection between the alarm control panel and the security devices of the security alarm system during business hour and automatically setting the security alarm system to a standby condition at the close time of the commercial facility. At that standby condition, the auxiliary control device activates the door lock control to lock the entrance or exit door but the electrical connection between the alarm control panel and some of the security devices still remains bypassing to deactivate the alarm buzzer when any human activity of the customers inside the commercial facility is detected by the motion detectors of the security alarm system. Moreover, when a leaving customer is detected by a door sensor of the exit door, the auxiliary control device will activate the door lock control to unlock the exit door for a predetermined period of time automatically. The auxiliary control device can automatically control the security alarm system to switch to the disarming condition, standby condition and arming condition.

Claims

1. An auxiliary control device of a security alarm system, which is installed in a commercial facility, having an alarm control panel and a plurality of security devices including a plurality of motion detectors, at least a door motion sensor and a plurality of electrical appliances, comprising

an input driving circuitry for input connecting with said plurality of security devices of said security alarm system;

a counter circuitry for generating pulses mad computing a programmed period of predetermined dynamic delay time so as to set said security alarm system to a standby condition that when said motion detectors of said security alarm system detect a human activity occurred during said computing of said period of dynamic delay time, said counter circuitry is activated via the driving circuitry to reset and compute said period of dynamic delay time initially again;

a timing circuitry having a timer clock for sending a signal to activate said counter circuitry to begin said computing of said period of dynamic delay time at a function time preset in said timer clock;

a relay driver circuitry having a lock control for ensuring said door lock control to lock a door of said commercial facility during said standby condition;

a lock releasing circuitry for activating said door lock control to temporary release the locking of said door for a predetermined period of lock releasing time when a human activity is detected by said door motion sensor which is installed near said door during said standby condition;

an output circuitry for output connecting to said control panel of said security alarm system;

an output control circuitry for circuit bypassing the electrical connection between said control panel and said security devices during a predetermined period of opening time of said commercial facility and said standby condition, and for switching said security alarm system to an arming condition from said standby condition by releasing said circuit bypassing between said control panel and said security devices after said predetermined period of dynamic delay time is computed by said counter circuitry;

a protecting circuitry for preventing any high potential difference occurred between said input driving circuitry and said output circuitry of said auxiliary control device;

a driver control circuitry, which is connected to said buzzer and a plurality of electrical appliances of said commercial facility, for deactivating said buzzer and cutting a power supply to said electrical appliances during said standby condition for energy saving; and

a display circuitry for indicating a plurality of status of said security alarm system;

whereby, before said function time, said auxiliary control device is activated to bypass said electrical connection between said alarm control panel and said plurality of security devices of said security alarm system installed in said commercial facility so as to set said security alarm system to a disarming condition during a predetermined period of time; and

that when said function time preset in said timing circuitry is reached, said timing circuitry activates said counter circuitry beginning to generate pulses and compute said predetermined period of dynamic delay time, wherein said security alarm system is set to said standby condition;

during said standby condition, said output control circuitry of said auxiliary control device being activated for continuing to bypass said electrical connection between said alarm control panel and said security devices, said driver control circuitry deactivating said buzzer of said security alarm system and cutting off said power supply to said predetermined electrical appliances, said lock control of said relay driver circuitry being activated to lock said door, said motion detectors of said security alarm system detecting whether there is a human activity inside said commercial facility and resetting said predetermined period of dynamic delay time to compute initially again when said human activity is detected by said motion detectors, said door motion sensor of said security alarm system detecting whether there is a human activity near said locked door and unlocking said door for said predetermined period of lock releasing time by said lock releasing circuitry when said human activity is detected by said door sensor; and

after said predetermined period of dynamic delay time being computed by said counter circuitry, said output control circuitry connecting said electrical connection between said alarm control panel and said security devices by releasing said bypassing between said alarm control panel and said security devices, in order to set said security alarm system to an arming condition.

2. An auxiliary control device, as recited in claim 1, in which said input driving circuitry comprises a predetermined number of input terminal units Z1i to Z8i, each of said input terminal units being connected in series to a logic gate OR8 and an anti-phase amplifier IN12 for input connecting with said security devices.

3. An auxiliary control device, as recited in claim 2, in which said counter circuitry comprises a logic gate OR4, a clock module and a timer counter, wherein said predetermined period of dynamic delay time is programmed into said timer counter, said logic gate OR4 having an input and an output, said input being connected to said anti-phase amplifier IN11 and said clock module, said output being connected to said timer counter.

4. An auxiliary control device, as recited in claim 3, in which said clock module is a pulse generator clock integrate circuit 4060 and said timer counter is a counter integrate circuit 4024 for computing said period of dynamic delay time programmed in said clock IC 4060.

5. An auxiliary control device, as recited in claim 4, in which said counter circuitry farther comprises a force arming enable switch SW2 connected between said clock module and said timer counter.

6. An auxiliary control device, as recited in claim 3, in which said timing circuitry further comprises a capacitor Co connected between a grounded line and a 12V power line, a capacitor C01 connected in parallel with said capacitor Co, a resistor R61 connected in series with three diodes D61, D62, D63 and in parallel with said capacitor C01, wherein said timer clock which is a digital programmable timer set DT-7 CM for presetting said function time of said counter circuitry has a R end connected to a capacitor C61, which is connected in parallel with said three diodes D61, D62, D63, and a B end connected to said grounded line, said timer clock further having a G end connected to a resistor R3 which is connected in series with a transistor Q6, wherein said transistor Q6 is connected to a resistor R64 and an input end of an anti-phase amplifier IN12, and that said resistor R64 is further connected to said power line, wherein an output end of said anti-phase amplifier IN12 is connected to said input of said logic gate OR4 and said clock module of said counter circuitry.

7. An auxiliary control device, as recited in claim 6, in which said lock releasing circuitry is a delay circuitry comprising a logic gate AND2 having an output connected to a resistor R53 which is connected with said transistor Q5 and said resistor R54 of said relay driver circuitry, an input of said logic gate AND2 being connected to said input of said anti-phase amplifier IN12 and a resistor R52 which is connected in parallel with a resistor R51 and a diode D52, in which said input of said diode D52 is connected to a capacitor C51 which is connected to said grounded line, and that said resistor R51 is connected to an output of a logic gate OR2.

8. An auxiliary control device, as recited in claim 7, in which said output circuitry comprises two output switches which are two solid state contact integrate circuits 4066 and provide a plurality of output terminal units Z1o to Z8o for connecting with said alarm control panel, said output control circuitry further comprising a plurality of resistors R81 to R88 connected with said plurality of output terminal units Z1o to Z8o of said two output switches respectively.

9. An auxiliary control device, as recited in claim 8, in which said output control circuitry comprises a plurality of logic gates NAND1 to NAND8, wherein each output of said logic gates NAND1 to NAND8 is connected to said plurality of output terminal units Z1o to Z8o via said plurality of resistors R81 to R82 respectively while each input of said logic gates NAND1 to NAND8 connecting to said input terminal units Z1i to Z8i of said input driving circuitry respectively, and that said inputs of said logic gates NAND1 to NAND8 are further connected in parallel with a logic gate OR1, a logic gate AND1 and a resistor R36, wherein an input of said logic gate OR1 is connected to a logic gate OR3 and an input of the logic gate AND1 is connected to said input of said logic gate AND2 of said lock releasing circuitry and an input of said anti-phase amplifier IN12 of the timing circuitry, a first input of said logic gate OR3 being connected to a resistor R41 while a second input of said logic gate OR3 being connected to a resistor R42, a capacitor C52 and a manual bypass switch SW1, in which both said resistors R41 and R42 are connected with said grounded line, and that said manual bypass switch SW1 is connected with said power line, said input of said logic gate OR2, said resistor R36, and said inputs of said logic gates NAND1 to NAND8 for manually controlling said bypassing said electrical connection between said alarm control panel and said security devices.

10. An auxiliary control device, as recited in claim 9, in which said protecting circuitry comprises a resistor R33 connected in parallel with a capacitor C32 and said two output switches, said capacitor C32 being connected to a diode D31 which is connected in parallel with a resistor R33'"'"' and a capacitor C32'"'"', wherein said diode D31, said resistor R33'"'"' and said capacitor C32'"'"' are connected with said grounded line.

11. An auxiliary control device, as recited in claim 10, in which said driver control circuitry comprises a buzzer driver and a relay driver, wherein said buzzer driver which is a driver integrate circuit 556 has a first foot connected with two resistors R73, R74 which are connected to said power line and said grounded line respectively, a second foot and a sixth foot of said buzzer driver being connected to said resistor which is connected in parallel with a diode R71, a fourth foot and a tenth foot of said buzzer driver being connected to said inputs of said logic gates AND1 and AND2, a thirteenth foot of said buzzer driver connected to two resistors R71, R72 which are connected to said power line and said grounded line respectively, a twelfth foot and a eighth foot of said buzzer driver being connected to said resistor R72 and said display circuitry via a diode D72, a seventh foot of said buzzer driver being connected to said grounded line, wherein said resistors R72 and R74 are connected to said grounded line via two capacitors C71 and C72 respectively, and that said relay driver is a relay RL2 which is connected in series between a ninth foot of said buzzer driver and said grounded line, a fifth foot of said buzzer driver and said relay driver forming a positive and a negative terminals for connecting with said buzzer of said security alarm system, wherein said relay driver and said negative terminal are grounded via said grounded line, an output of said relay driver forming an auxiliary control for connecting with said electrical appliances.

12. An auxiliary control device, as recited in claim 1, further comprising a remote control receiver which is connected to said counter circuitry for releasing said locked door after said function time of said auxiliary control device and setting to said standby condition.

13. An auxiliary control device, as recited in claim 11, further comprising a remote control receiver which is connected to said counter circuitry for releasing said locked door after said function time of said auxiliary control device and setting to said standby condition.

14. An auxiliary control device, as recited in claim 1, further comprising a system status output drive connected to said output control circuitry for reporting various system status to a control center by a system status output which is connected to said system status output drive.

15. An auxiliary control device, as recited in claim 11, further comprising a system status output drive connected to said output control circuitry for reporting various system status to a control center by a system status output which is connected to said system status output drive.

16. An auxiliary control device, as recited in claim 15, in which said system status output drive comprises a transistor Q7 which is connected to said output control circuitry via two resistors R81 and R82, wherein said two resistors R81 and R82 are connected to an input end and an output end of said transistor Q7 respectively.

17. A process for controlling a timing of switching a security alarm system to an arming condition, comprising the following steps of:

(a) bypassing an electrical connection between an arming alarm control panel and a plurality of security devices of a security alarm system installed in a commercial facility when an open time of said commercial facility is reached, so as to set said security alarm system to a disarming condition during a predetermined period of time;

(b) computing a predetermined period of dynamic delay time when a preset close time of said commercial facility is reached, wherein said security alarm system is set to a standby condition;

(c) bypassing said electrical connection between said alarm control panel and said security devices, including a plurality of motion detectors installed in a plurality of predetermined timer-controlled monitoring zones, during said predetermined period of dynamic delay time;

(d) deactivating a buzzer of said security alarm system during said predetermined period of dynamic delay time;

(e) cutting off a power supply of a plurality of predetermined electrical appliances of said commercial facility during said predetermined period of dynamic delay time;

(f) locking a plurality of exit doors when said close time of said commercial facility is reached;

(g) detecting a human activity occurred inside said timer-controlled monitoring zones of said commercial facility by said motion detectors installed in said timer-controlled monitoring zones of said commercial facility during said predetermined period of dynamic delay time;

(h) resetting said predetermined period of dynamic delay time to compute initially again when said human activity is detected by said motion detectors installed in said timer-controlled monitoring zones;

(i) detecting a human activity occurred near said locked exit door during said predetermined period of dynamic delay time;

(j) unlocking said exit door for a predetermined of lock releasing time when said human activity occurred near said locked exit door is detected by a door sensor installed near said exit door; and

(k) connecting said electrical connection between said alarm control panel and said security devices by releasing said bypassing between said alarm control panel and said security devices, in order to set said security alarm system to an arming condition after said predetermined period of dynamic delay time is computed and none of said motion detectors of said timer-controlled monitoring zones detects said human activity for said period of dynamic delay time.