CN203480667U - Door opening time delay alarm - Google Patents
Door opening time delay alarm Download PDFInfo
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- CN203480667U CN203480667U CN201320557981.0U CN201320557981U CN203480667U CN 203480667 U CN203480667 U CN 203480667U CN 201320557981 U CN201320557981 U CN 201320557981U CN 203480667 U CN203480667 U CN 203480667U
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Abstract
The utility model provides a door opening time delay alarm. The alarm comprises a power supply unit, a timing recovery unit and a time delay alarm unit. The power supply unit provides a direct current power supply for other units in the door opening time delay alarm. When a door of a reference room or an IT machine room database is opened normally, door sensors separate which means that normally closed contacts are in a break state, and a current charges a charging capacitor via a charging resistor module. After people passes through the door, the door is automatically closed through a door closer. If closing time is within setting delay time, the door sensors fit, the normally closed contacts are pulled in and two end voltages of the charging capacitor reach 0V. When the closing time exceeds the setting delay time, the two end voltages of the charging capacitor reach a breakdown voltage of a voltage stabilizing diode, the voltage stabilizing diode is conducted and an alarm signal is output to the time delay alarm unit so that nearby personnel or duty room personnel is prompted to close the door or check the situation.
Description
Technical field
The utility model relates to a kind of electronic circuit, relates in particular to a kind of delay alarm that opens the door.
Background technology
In semi-conductive processing procedure, reference room and IT machine room database are very important, if having opened door does not close, can affect the secrecy of each data and technology, so all doors will must be carried out to safe closing after personnel leave, may cause the serious consequences such as data, data leakage or damage if close not in time.Now just need a kind of after door is opened a period of time, can remind near personnel or the duty room personnel device of closing the door or observing conditions, but in prior art, also do not have this device.
Utility model content
The utility model provides a kind of delay alarm that opens the door, and with near personnel reminding after opening a period of time at the door of reference room or IT machine room database or duty room personnel, closes the door.
For achieving the above object, the utility model provides a kind of delay alarm that opens the door, on described door, be provided with an opposite house magnetic, be arranged at accordingly respectively on the bascule and fixed sturcture of described door, as a normally closed contact, the described delay alarm that opens the door comprises that power supply provides unit, timing restoration unit and delayed alarm unit, described timing restoration unit comprises charging resistor module and charging capacitor, one end of described charging resistor module provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described charging capacitor, the other end of described charging capacitor provides the negative pole of unit DC voltage output end to be connected with described power supply, described delayed alarm unit is all in parallel with described charging capacitor with described normally closed contact, described delayed alarm unit comprises a voltage stabilizing diode, described delayed alarm unit is connected with the positive pole of described charging capacitor by described voltage stabilizing diode.
Further, described charging resistor module comprises basic resistance and slide rheostat, one end of described basic resistance provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described slide rheostat, and the other end of described slide rheostat is connected with one end of described charging capacitor.
Further, described normally closed contact is in parallel with described charging capacitor after connecting with a discharge resistance.
Further, described delayed alarm unit also comprises that first falls leakage resistance, and described delayed alarm unit falls leakage resistance by described first and is connected with described voltage stabilizing diode.
Further, described delayed alarm unit also comprises driver output module and alarm module, described driver output module all provides unit to be connected with described power supply with described alarm module, described driver output module is fallen leakage resistance by described first and is connected with described voltage stabilizing diode, and described alarm module is connected with described driver output module.
Further, described driver output module comprises complex pipe and relay, described relay comprises relay coil and the first normally opened contact, the base stage of described complex pipe and described first is fallen leakage resistance and is connected, its emitter is connected with the negative pole of described charging capacitor, its collector is connected with one end of described relay coil, the other end of described relay coil provides the positive pole of unit DC voltage output end to be connected with described power supply, one end of described the first normally opened contact is connected with alarm module, its other end provides the positive pole of unit DC voltage output end to be connected with described power supply.
Further, described relay coil is in parallel with a fly-wheel diode.
Further, described alarm module comprises pulse alarm and alarming horn, one end of described pulse alarm is connected with described the first normally opened contact, its other end is connected with one end of described alarming horn, and the other end of described alarming horn provides the negative pole of unit DC voltage output end to be connected with described power supply.
Further, described alarm module also comprises the first light emitting diode, and described the first light emitting diode is in parallel with described alarming horn.
Further, described alarm module also comprises that second falls leakage resistance, and described the first light emitting diode is with described second to fall leakage resistance in parallel with described alarming horn after connecting.
Further, described relay also comprises the second normally opened contact, and described the second normally opened contact is connected with the alarm host machine of duty room.
Further, described power supply provides unit to comprise alternating current input power supplying, transformer, rectification circuit, filter circuit of pressure-stabilizing and pull-up resistor, described alternating current input power supplying is connected with the input end of described transformer, the alternating voltage of described transformer output terminal output is by described rectification circuit rectification, and provide DC voltage to the DC voltage input end of described filter circuit of pressure-stabilizing, the two ends of described pull-up resistor respectively with described filter circuit of pressure-stabilizing DC voltage output end just, negative pole connects, described filter circuit of pressure-stabilizing DC voltage output end just, negative pole is described power supply and is just providing unit DC voltage output end, negative pole.
Further, described rectification circuit is full-wave bridge rectifier circuit.
Further, described filter circuit of pressure-stabilizing comprises integrated regulator, weakening electric capacity and filter capacitor, the input end of described integrated regulator is connected with the positive pole of the DC voltage of the described rectification circuit rectification of process, its output terminal is connected with one end of described pull-up resistor, its earth terminal ground connection and with through the negative pole of DC voltage and the other end of described pull-up resistor of described rectification circuit rectification, be connected, its output and ground is just being respectively described filter circuit of pressure-stabilizing DC voltage output end, negative pole, the two ends of described weakening electric capacity are connected with the output and ground of described integrated regulator respectively, the two ends of described filter capacitor are connected with earth terminal with the input end of described integrated regulator respectively.
Further, described power supply provides unit also to comprise the second light emitting diode, the DC voltage output end of described pull-up resistor described filter circuit of pressure-stabilizing of access after connecting with described the second light emitting diode.
Compared with prior art, the utlity model has following beneficial effect:
The delay alarm that opens the door that the utility model provides comprises that power supply provides unit, timing restoration unit and delayed alarm unit, and power supply provides unit to provide direct supply for other unit that this opens the door in delay alarm.When the door of reference room or IT machine room database is normally opened, door magnetic leaves, be that normally closed contact is opened, electric current charges to charging capacitor through charging resistor module, the voltage at charging capacitor two ends progressively rises, the common makeup time delay circuit of charging capacitor and charging resistor module, plays the effect of time delay output alarm signal, and the time of this time delay can regulate by changing the resistance of charging resistor module.After the normal inlet/outlet of personnel, door can be closed automatically by door closer, if the shut-in time is in the delay time of setting, door magnetic matches, and normally closed contact adhesive, by the electric current normally closed contact that again leads, and the charging capacitor of not flowing through, charging capacitor both end voltage is pulled to again 0V; When the shut-in time surpasses the delay time of setting, the voltage at charging capacitor two ends can reach the voltage breakdown of voltage stabilizing diode, the conducting immediately of this voltage stabilizing diode, closes the door or observes conditions with near personnel reminding or duty room personnel to delayed alarm unit output alarm signal.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
The circuit structure diagram of the delay alarm that opens the door that Fig. 1 provides for the utility model embodiment.
In Fig. 1,
TD: transformer; IC: integrated regulator; KS: normally closed contact; KA: relay coil; KA-1: the first normally opened contact; YD: alarming horn; W: slide rheostat; D1, D2, D3, D4: commutation diode; D5: the second light emitting diode; D6: voltage stabilizing diode; D7: fly-wheel diode; D8: the first light emitting diode; C1: filter capacitor; C2: weakening electric capacity; C3: charging capacitor; R1: pull-up resistor; R2: basic resistance; R3: discharge resistance; R4: first falls leakage resistance; R5: second falls leakage resistance; Q1, Q2: triode.
Embodiment
Below in conjunction with the drawings and specific embodiments, the delay alarm that opens the door the utility model proposes is described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment lucidly.
Core concept of the present utility model is, a kind of delay alarm that opens the door is provided, and it comprises that power supply provides unit, timing restoration unit and delayed alarm unit, and power supply provides unit to provide direct supply for other unit that this opens the door in delay alarm.When the door of reference room or IT machine room database is normally opened, door magnetic leaves, be that normally closed contact is opened, electric current charges to charging capacitor through charging resistor module, the voltage at charging capacitor two ends progressively rises, the common makeup time delay circuit of charging capacitor and charging resistor module, plays the effect of time delay output alarm signal, and the time of this time delay can regulate by changing the resistance of charging resistor module.After the normal inlet/outlet of personnel, door can be closed automatically by door closer, if the shut-in time is in the delay time of setting, door magnetic matches, and normally closed contact adhesive, by the electric current normally closed contact that again leads, and the charging capacitor of not flowing through, charging capacitor both end voltage is pulled to again 0V; When the shut-in time surpasses the delay time of setting, the voltage at charging capacitor two ends can reach the voltage breakdown of voltage stabilizing diode, the conducting immediately of this voltage stabilizing diode, closes the door or observes conditions with near personnel reminding or duty room personnel to delayed alarm unit output alarm signal.
Please refer to Fig. 1, the circuit structure diagram of the delay alarm that opens the door that Fig. 1 provides for the utility model embodiment.
As shown in Figure 1, the utility model embodiment provides a kind of delay alarm that opens the door, and on the door of reference room or IT machine room database, is provided with an opposite house magnetic, is arranged at accordingly respectively on the bascule and fixed sturcture of described door, as a normally closed contact KS.In the present embodiment, described bascule is door leaf, and fixed sturcture is doorframe, and what can expect is, if the door of described reference room or IT machine room database is double door, two correspondence positions of fanning on door leafs that this opposite house abampere are contained in to described double door also can play as the effect of normally closed contact KS.The described delay alarm that opens the door comprises that power supply provides unit, timing restoration unit and delayed alarm unit, described timing restoration unit comprises charging resistor module and charging capacitor C3, one end of described charging resistor module provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described charging capacitor C3, the other end of described charging capacitor C3 provides the negative pole of unit DC voltage output end to be connected with described power supply, described delayed alarm unit is all in parallel with described charging capacitor C3 with described normally closed contact KS, described delayed alarm unit comprises a voltage stabilizing diode D6, described delayed alarm unit is connected with the positive pole of described charging capacitor C3 by described voltage stabilizing diode D6.
Further, described charging resistor module comprises basic resistance R 2 and slide rheostat W, one end of described basic resistance R 2 provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described slide rheostat W, and the other end of described slide rheostat is connected with one end of described charging capacitor C3.Described charging resistor module can be by regulating the resistance of described slide rheostat W, to regulate the duration of charging of described charging capacitor C3.In the present embodiment, the maximum capacitance of described charging capacitor C3 is 47 μ F, and its both end voltage is up to 25V, and the resistance of described basic resistance R 2 is 20K Ω, and the maximum value of described slide rheostat W is 560K Ω, and the voltage breakdown of described voltage stabilizing diode D6 is 7V.
Further, described normally closed contact KS is in parallel with described charging capacitor C3 after connecting with a discharge resistance R3, and, in described charging capacitor C3 mono-tunnel parallel branch, described normally closed contact KS connects with described discharge resistance R3.When described normally closed contact KS is closed, electric current can be walked around described charging capacitor C3, and the described discharge resistance R3 that flows through makes the described charging capacitor C3 can be by described discharge resistance R3 rapid discharge, so that its duration of charging next time can not shorten because of not being discharged or extend.In the present embodiment, the resistance of described discharge resistance R3 is 20K Ω.
Further, described delayed alarm unit also comprises that first falls leakage resistance R4, and described delayed alarm unit falls leakage resistance R4 by described first and is connected with described voltage stabilizing diode D6.Described first falls leakage resistance R4 can reduce the electric current that flows into delayed alarm unit, the device in protection delayed alarm unit.In the present embodiment, the described first resistance of falling leakage resistance R4 is 82K Ω.
Further, described delayed alarm unit also comprises driver output module and alarm module, described driver output module all provides unit to be connected with described power supply with described alarm module, described driver output module is fallen leakage resistance R4 by described first and is connected with described voltage stabilizing diode D6, and described alarm module is connected with described driver output module.Described driver output module comprises complex pipe and relay, two triode Q1, Q2 is linked together and is formed described complex pipe by composite joint mode, the enlargement factor of described complex pipe is described two triode Q1, the product of Q2 enlargement factor, its polarity is identical with the polarity of triode Q1, described relay comprises relay coil KA and the first normally opened contact KA-1, while flowing through the electric current (general >=50mA) over a certain size in described relay coil KA, described the first normally opened contact KA-1 just can adhesive, the base stage and described first of described complex pipe (being triode Q1) is fallen leakage resistance R4 and is connected, its emitter is connected with the negative pole of described charging capacitor C3, its collector is connected with one end of described relay coil KA, the other end of described relay coil KA provides the positive pole of unit DC voltage output end to be connected with described power supply, one end of described the first normally opened contact KA-1 is connected with alarm module, its other end provides the positive pole of unit DC voltage output end to be connected with described power supply.Due to the starting current of relay large (being generally about 50mA), so this driver output module is by there being the complex pipe of larger enlargement factor to amplify from the electric current of charging capacitor C3 inflow, so that described relay coil KA can work.In the present embodiment, the model of described triode Q1, Q2 is C9014.
Further, described relay coil KA is in parallel with a sustained diode 7.When relay coil KA forwards off-position to suddenly from "on" position; can produce great inverse electromotive force; in addition power supply provides the voltage that unit provides; be easy to cause the damage of circuit devcie; therefore in the two ends of relay coil KA sustained diode 7 in parallel, when relay coil KA forwards off-position to suddenly and while producing inverse electromotive force, D7 forward conduction forms afterflow from "on" position; current drain is fallen, thereby played the effect of holding circuit.In the present embodiment, the model of described sustained diode 7 is 1N4001.
Further, described alarm module comprises pulse alarm and alarming horn YD, one end of described pulse alarm is connected with described the first normally opened contact KA-1, its other end is connected with one end of described alarming horn YD, and the other end of described alarming horn YD provides the negative pole of unit DC voltage output end to be connected with described power supply.Described alarming horn YD can be by the regular pulse signal of described pulse alarm output, and by conducting regularly and cut-off, to send alarm sound, near reminding, personnel close the door.In the present embodiment, described pulse alarm is NE555 pulse per second (PPS) alarm.
Further, described alarm module also comprises the first light emitting diode D8, and described the first light emitting diode D8 is in parallel with described alarming horn YD.Described the first light emitting diode D8 can be by the regular pulse signal of described pulse alarm output, and by conducting regularly and cut-off, so that alarm lamp flicker, near reminding, personnel close the door.In the present embodiment, described the first light emitting diode D8 is 2CE series diode.
Further, described alarm module also comprises that second falls leakage resistance R5, described the first light emitting diode D8 is with described second to fall leakage resistance R5 in parallel with described alarming horn YD after connecting, in described alarming horn YD mono-tunnel parallel branch, described the first light emitting diode D8 and described second falls leakage resistance R5 and connects.Described second falls leakage resistance R5 can reduce the electric current that flows into the first light emitting diode D8, protects described the first light emitting diode D8 not damaged.In the present embodiment, the described second resistance of falling leakage resistance R5 is 2K Ω.
Further, described relay also comprises the second normally opened contact (not shown), while flowing through the electric current (general >=50mA) over a certain size in described relay coil KA, described the second normally opened contact just can be with the first normally opened contact KA-1 adhesive, and described the second normally opened contact is connected with the alarm host machine of duty room.When the second normally opened contact adhesive, the alarm host machine in duty room can give the alarm, and reminds the staff of duty room to go reference room or IT machine room database to observe conditions.
Further, described power supply provides unit to comprise alternating current input power supplying, transformer TD, rectification circuit, filter circuit of pressure-stabilizing and pull-up resistor R1, described alternating current input power supplying is connected with the input end of described transformer TD, the alternating voltage of described transformer output terminal output is by described rectification circuit rectification, and provide DC voltage to the DC voltage input end of described filter circuit of pressure-stabilizing, the two ends of described pull-up resistor R1 respectively with described filter circuit of pressure-stabilizing DC voltage output end just, negative pole connects, described filter circuit of pressure-stabilizing DC voltage output end just, negative pole is described power supply and is just providing unit DC voltage output end, negative pole.In the present embodiment, the resistance of described pull-up resistor R1 is 2K Ω, and described alternating current input power supplying input voltage is alternating current 220V voltage (AC220V), and described transformer TD reduces to the input voltage of this alternating current input power supplying to exchange 15V voltage (ac15V).
Further, described rectification circuit is full-wave bridge rectifier circuit, and described full-wave bridge rectifier circuit comprises four commutation diode D1, D2, D3, D4, and is connected to form in a certain way electric bridge, and this connected mode is prior art, at this, just repeats no more.Described full-wave bridge rectifier circuit is for being converted to DC voltage by the alternating voltage of described transformer output terminal output, and this DC voltage is offered to the DC voltage input end of described filter circuit of pressure-stabilizing, the connected mode of this conversion regime and front and back circuit is all prior art, at this, also just repeats no more.In the present embodiment, the model of described commutation diode D1, D2, D3, D4 is 1N4007.
Further, described filter circuit of pressure-stabilizing comprises integrated regulator IC, weakening capacitor C 2 and filter capacitor C1, the input end of described integrated regulator IC is connected with the positive pole of the DC voltage of the described rectification circuit rectification of process, its output terminal is connected with one end of described pull-up resistor R1, its earth terminal ground connection and being connected with the other end of described pull-up resistor R1 with the negative pole through the DC voltage of described rectification circuit rectification, its output and ground is just being respectively described filter circuit of pressure-stabilizing DC voltage output end, negative pole, the two ends of described weakening capacitor C 2 are connected with the output and ground of described integrated regulator IC respectively, the two ends of described filter capacitor C1 are connected with earth terminal with the input end of described integrated regulator IC respectively.The DC voltage that described integrated regulator IC can be 15V by the peak value through rectification circuit rectification is with the stable DC Voltage-output of 12V, described weakening capacitor C 2 is for eliminating the self-sustained oscillation of described integrated regulator IC, improve the ability in passing of electric current, described filter capacitor C1, for before DC voltage enters described integrated regulator IC, carries out filtering to it.In the present embodiment, the model of described integrated regulator IC is L7812, and the maximum capacitance of described weakening capacitor C 2 and described filter capacitor C1 is 47 μ F, the highest 25V that is of its both end voltage.
Further, described power supply provides unit also to comprise the second light emitting diode D5, the DC voltage output end of described pull-up resistor R1 described filter circuit of pressure-stabilizing of access after connecting with described the second light emitting diode D5, the one end that is described pull-up resistor R1 is connected with the output terminal of described integrated regulator IC, its other end is connected with one end of described the second light emitting diode D5, and the other end of described the second light emitting diode D5 is connected with the earth terminal of described integrated regulator IC.At described power supply, provide unit when normal operation, described the second light emitting diode D5 is light yellow always just, to show that this delay alarm that opens the door works.In the present embodiment, described the second light emitting diode D5 is 2CE series diode.
Below in conjunction with Fig. 1, describe the course of work of the delay alarm that opens the door that the utility model embodiment provides in detail.
One end of described basic resistance R 2 is connected with the output terminal of described integrated regulator IC, the other end of described charging capacitor C3 is connected with the earth terminal of described integrated regulator IC, be that described power supply provides unit to provide 12V DC voltage for described timing reset unit, when the door of reference room or IT machine room database is normally opened, door magnetic leaves, be that normally closed contact KS opens, basic resistance R 2 and the slide rheostat W of electric current in charging resistor module charges to charging capacitor C3, the voltage at charging capacitor C3 two ends progressively rises, the common makeup time delay circuit of charging capacitor C3 and charging resistor module, play the effect of time delay output alarm signal, the time of this time delay can regulate that (in the present embodiment, delay time is that 0～60s is adjustable by changing the resistance of slide rheostat W, this numerical value can calculate by simple circuit, at this, just repeat no more).After the normal inlet/outlet of personnel, door can be closed automatically by door closer, if the shut-in time is in the delay time (being 10s in the present embodiment) of setting, door magnetic matches, normally closed contact KS adhesive, by the electric current normally closed contact KS that again leads, and the charging capacitor C3 that do not flow through, charging capacitor C3 both end voltage is pulled to fast 0V again after discharge resistance R3 electric discharge, and alarm can not sounded, when the shut-in time surpasses the delay time of setting, the voltage at charging capacitor C3 two ends can reach the voltage breakdown 7V of voltage stabilizing diode D6, this voltage stabilizing diode D6 conducting immediately, immediately by triode Q1, the complex pipe conducting that Q2 forms, the two ends of relay coil KA produce pressure reduction, this pressure reduction starts relay, now, the first normally opened contact KA-1 adhesive in described relay, the regular pulse signal that described alarming horn YD can be exported by described NE555 pulse per second (PPS) alarm, by conducting regularly and cut-off, to send alarm sound, near reminding, personnel close the door, also adhesive immediately of the second normally opened contact in described relay, alerting signal is delivered to the alarm host machine in duty room, notify operator on duty to go reference room or IT machine room database to observe conditions.What can expect is, in described relay, also can increase other normally opened contacts, to carry out figure control warning or to be linked in the alarm host machine in other regions in access Programmable Logic Controller (PLC), and alert data is filed, to strengthen the warning effect of this delay alarm that opens the door simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are changed and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (15)
1. the delay alarm that opens the door, it is characterized in that, on door, be provided with an opposite house magnetic, be arranged at accordingly respectively on the bascule and fixed sturcture of door, as a normally closed contact, the described delay alarm that opens the door comprises that power supply provides unit, timing restoration unit and delayed alarm unit, described timing restoration unit comprises charging resistor module and charging capacitor, one end of described charging resistor module provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described charging capacitor, the other end of described charging capacitor provides the negative pole of unit DC voltage output end to be connected with described power supply, described delayed alarm unit is all in parallel with described charging capacitor with described normally closed contact, described delayed alarm unit comprises a voltage stabilizing diode, described delayed alarm unit is connected with the positive pole of described charging capacitor by described voltage stabilizing diode.
2. the delay alarm that opens the door according to claim 1, it is characterized in that, described charging resistor module comprises basic resistance and slide rheostat, one end of described basic resistance provides the positive pole of unit DC voltage output end to be connected with described power supply, its other end is connected with one end of described slide rheostat, and the other end of described slide rheostat is connected with one end of described charging capacitor.
3. the delay alarm that opens the door according to claim 1, is characterized in that, described normally closed contact is in parallel with described charging capacitor after connecting with a discharge resistance.
4. the delay alarm that opens the door according to claim 1, is characterized in that, described delayed alarm unit also comprises that first falls leakage resistance, and described delayed alarm unit falls leakage resistance by described first and is connected with described voltage stabilizing diode.
5. the delay alarm that opens the door according to claim 4, it is characterized in that, described delayed alarm unit also comprises driver output module and alarm module, described driver output module all provides unit to be connected with described power supply with described alarm module, described driver output module is fallen leakage resistance by described first and is connected with described voltage stabilizing diode, and described alarm module is connected with described driver output module.
6. the delay alarm that opens the door according to claim 5, it is characterized in that, described driver output module comprises complex pipe and relay, described relay comprises relay coil and the first normally opened contact, the base stage of described complex pipe and described first is fallen leakage resistance and is connected, its emitter is connected with the negative pole of described charging capacitor, its collector is connected with one end of described relay coil, the other end of described relay coil provides the positive pole of unit DC voltage output end to be connected with described power supply, one end of described the first normally opened contact is connected with alarm module, its other end provides the positive pole of unit DC voltage output end to be connected with described power supply.
7. the delay alarm that opens the door according to claim 6, is characterized in that, described relay coil is in parallel with a fly-wheel diode.
8. the delay alarm that opens the door according to claim 6, it is characterized in that, described alarm module comprises pulse alarm and alarming horn, one end of described pulse alarm is connected with described the first normally opened contact, its other end is connected with one end of described alarming horn, and the other end of described alarming horn provides the negative pole of unit DC voltage output end to be connected with described power supply.
9. the delay alarm that opens the door according to claim 8, is characterized in that, described alarm module also comprises the first light emitting diode, and described the first light emitting diode is in parallel with described alarming horn.
10. the delay alarm that opens the door according to claim 9, is characterized in that, described alarm module also comprises that second falls leakage resistance, and described the first light emitting diode is with described second to fall leakage resistance in parallel with described alarming horn after connecting.
11. delay alarms that open the door according to claim 6, is characterized in that, described relay also comprises the second normally opened contact, and described the second normally opened contact is connected with the alarm host machine of duty room.
12. according to the delay alarm that opens the door described in claim 1 to 11 any one, it is characterized in that, described power supply provides unit to comprise alternating current input power supplying, transformer, rectification circuit, filter circuit of pressure-stabilizing and pull-up resistor, described alternating current input power supplying is connected with the input end of described transformer, the alternating voltage of described transformer output terminal output is by described rectification circuit rectification, and provide DC voltage to the DC voltage input end of described filter circuit of pressure-stabilizing, the two ends of described pull-up resistor respectively with described filter circuit of pressure-stabilizing DC voltage output end just, negative pole connects, described filter circuit of pressure-stabilizing DC voltage output end just, negative pole is described power supply and is just providing unit DC voltage output end, negative pole.
13. delay alarms that open the door according to claim 12, is characterized in that, described rectification circuit is full-wave bridge rectifier circuit.
14. delay alarms that open the door according to claim 12, it is characterized in that, described filter circuit of pressure-stabilizing comprises integrated regulator, weakening electric capacity and filter capacitor, the input end of described integrated regulator is connected with the positive pole of the DC voltage of the described rectification circuit rectification of process, its output terminal is connected with one end of described pull-up resistor, its earth terminal ground connection and with through the negative pole of DC voltage and the other end of described pull-up resistor of described rectification circuit rectification, be connected, its output and ground is just being respectively described filter circuit of pressure-stabilizing DC voltage output end, negative pole, the two ends of described weakening electric capacity are connected with the output and ground of described integrated regulator respectively, the two ends of described filter capacitor are connected with earth terminal with the input end of described integrated regulator respectively.
15. delay alarms that open the door according to claim 12, it is characterized in that, described power supply provides unit also to comprise the second light emitting diode, the DC voltage output end of described pull-up resistor described filter circuit of pressure-stabilizing of access after connecting with described the second light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557981.0U CN203480667U (en) | 2013-09-09 | 2013-09-09 | Door opening time delay alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320557981.0U CN203480667U (en) | 2013-09-09 | 2013-09-09 | Door opening time delay alarm |
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| Publication Number | Publication Date |
|---|---|
| CN203480667U true CN203480667U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320557981.0U Expired - Lifetime CN203480667U (en) | 2013-09-09 | 2013-09-09 | Door opening time delay alarm |
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| CN (1) | CN203480667U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405238A (en) * | 2015-11-27 | 2016-03-16 | 南京邮电大学 | Dormitory safety management system based on infrared technology and wireless sensing technology |
| CN108922128A (en) * | 2018-06-22 | 2018-11-30 | 国网天津市电力公司 | A kind of computer room gate inhibition automatic alarm system |
-
2013
- 2013-09-09 CN CN201320557981.0U patent/CN203480667U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405238A (en) * | 2015-11-27 | 2016-03-16 | 南京邮电大学 | Dormitory safety management system based on infrared technology and wireless sensing technology |
| CN105405238B (en) * | 2015-11-27 | 2018-08-17 | 南京邮电大学 | A kind of dormitory safety management system based on infrared technique and wireless sensor technology |
| CN108922128A (en) * | 2018-06-22 | 2018-11-30 | 国网天津市电力公司 | A kind of computer room gate inhibition automatic alarm system |
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Granted publication date: 20140312 |
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