CN202795622U - Light-controlled type door magnetic sensor - Google Patents
Light-controlled type door magnetic sensor Download PDFInfo
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- CN202795622U CN202795622U CN201220499862.XU CN201220499862U CN202795622U CN 202795622 U CN202795622 U CN 202795622U CN 201220499862 U CN201220499862 U CN 201220499862U CN 202795622 U CN202795622 U CN 202795622U
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Abstract
The utility model relates to a light-controlled type door magnetic sensor. The light-controlled type door magnetic sensor comprises a commutating unit, a voltage-dividing unit and a voltage control unit, wherein a voltage control unit is connected with the voltage-dividing unit and the commutating unit respectively, the voltage-dividing unit is connected with the commutating unit, the commutating unit is provided with two wiring terminals which are connected with an access control interface respectively, the voltage-dividing unit is provided with a photosensitive device, the voltage of the connection point of the voltage control unit and the voltage-dividing unit is reduced in a bright light environment to cut off the voltage control unit, and the voltage of the connection point of the voltage control unit and the voltage-dividing unit is increased in a dark light environment to put through the voltage control unit. The light-controlled type door magnetic sensor can respond to the bright light environment inside a base station timely and can effectively detect the condition that a person enters the base station or turns on the light, and no power supply is required to be installed.
Description
Technical field
The utility model relates to automation field, relates in particular to a kind of light-operated door status sensor.
Background technology
The environmental monitoring of mobile base station door status sensor commonly used detects whether the someone enters the base station, for preventing by the situation of trimming or installation loose contact, door status sensor commonly used is take closed type as main, if the door of base station is closed when this door status sensor, then door status switch is short-circuit condition; And the door of base station is when opening, and door status switch is open-circuit condition.There is certain defective in this detection mode, for example some cracker can enter the base station by the mode of forcing open the door or destroy wall, and directly do not open the door of base station, then can make the gate inhibition monitor the supervisory function bit that to bring into play essence, and cause the malignant events such as the destroyed or equipment of inside of base station is stolen.
At present, also there is unit to attempt in the base station, surveying with the mode of infrared sensor of the human body whether the someone enters the base station, but this sensor is designed primarily to family expenses or use the office space, and the machine room of base station is because air-conditioning work when unusually high temperature occurring, cause easily this sensor that the situation of wrong report occurs, and prior reason is that this infrared sensor of the human body needs external power supply, need to consider wiring space and security problems during installation.
The utility model content
The purpose of this utility model is to propose a kind of light-operated door status sensor, can enter opening the door of base station or use the situation of light effectively to survey the people, sensor installs additional or substitutes when former door status switch is installed works simply, and the situation of as far as possible avoiding reporting by mistake occurs.
For achieving the above object, the utility model provides a kind of light-operated door status sensor, comprise: the unit commutates, partial pressure unit and voltage control unit, described voltage control unit links to each other with the unit that commutates with described partial pressure unit respectively, described partial pressure unit links to each other with the described unit that commutates, the described unit that commutates has two terminals and links to each other with gate inhibition's interface respectively, described partial pressure unit has photosensitive device, under the light environment, reduce the voltage of the tie point of described voltage control unit and described partial pressure unit, so that the cut-off of described voltage control unit; Under the half-light environment, increase the voltage of the tie point of described voltage control unit and described partial pressure unit, so that described voltage control unit conducting.
Further, described voltage control unit is the enhancement mode field effect transistor, and the grid of described enhancement mode field effect transistor is connected with described partial pressure unit.
Further, described partial pressure unit comprises upper arm resistance and the underarm resistance of series connection, and the grid of described enhancement mode field effect transistor is connected between described upper arm resistance and the underarm resistance, and described underarm resistance is photoresistance.
Further, the described unit that commutates is full bridge rectifier, comprise the first diode, the second diode, the 3rd diode and the 4th diode, the negative pole of wherein said the 4th diode links to each other with the positive pole of the first diode, the negative pole of the 3rd diode links to each other with the positive pole of the second diode, the positive pole of described the 4th diode links to each other with the positive pole of the 3rd diode, and the negative pole of the first diode links to each other with the negative pole of the second diode.
Further, the tie point of the negative pole of described the 4th diode and the positive pole of the first diode and the negative pole of described the 3rd diode are drawn respectively two terminals with the tie point of the positive pole of the second diode and are linked to each other with described gate inhibition's interface, and the positive pole of described voltage control unit and negative pole are connected to the tie point of the positive pole of the positive pole of the tie point of negative pole of the negative pole of described the first diode and the second diode and described the 4th diode and the 3rd diode.
Further, also comprise door status switch, described door status switch is connected on described partial pressure unit and described commutating between the unit.
Based on technique scheme, consider that inside of base station light is darker, and the lawless person who enters the base station need to just conveniently steal under the light environment of object can seeing clearly, therefore the utility model utilizes the photosensitive device in the partial pressure unit that the light environment is reacted, the voltage of the tie point by changing voltage control unit and partial pressure unit, so that the voltage control unit cut-off, and then make gate inhibition's port be in high-impedance state, trigger the alarm of gate inhibition's port.So just can react the light environment in the base station in time, effectively detect the people and enter the situation that light is used in the base station, and the utility model light-operated door status sensor need not to install power supply, it can utilize the operating voltage of gate inhibition's port self to carry out work, only two lead-in wires of light-operated door status sensor need be linked to each other with gate inhibition's port when mounted and get final product, and because it is consistent with former door magnetic alarm status, also need not rewiring or increase peripheral circuit.Therefore simple installation uses safety, and saves taking of the space such as power lead.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of an embodiment of the utility model light-operated door status sensor.
Fig. 2 is the circuit diagram of a kind of specific implementation of Fig. 1 embodiment.
Fig. 3 is the fundamental diagram of gate inhibition's port of connecing of the utility model light-operated door status sensor embodiment.
Fig. 4 is the structural representation of another embodiment of the utility model light-operated door status sensor.
Fig. 5 is the circuit diagram of a kind of specific implementation of Fig. 4 embodiment.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
The inside of base station normal daylight is darker, and no matter illegal molecule enters or break wall and enter from door, and its purpose is theft or internal unit, must need the light environment to implement and will achieve this end.Therefore if can carry out perception to the light environment just can comparatively effectively judge inside of base station whether the someone invades.
Based on this thinking, the utility model provides a kind of light-operated door status sensor embodiment in Fig. 1, in the present embodiment, the light-operated door status sensor comprises: the unit 1 that commutates, partial pressure unit 2 and voltage control unit 3, voltage control unit 3 links to each other with the unit 1 that commutates with partial pressure unit 2 respectively, partial pressure unit 2 links to each other with the unit 1 that commutates, and links to each other with gate inhibition's interface respectively and the unit 1 that commutates has two terminals.Partial pressure unit 2 has photosensitive device, can reduce the voltage of the tie point of voltage control unit 3 and partial pressure unit 2 under the light environment, so that voltage control unit 3 cut-offs; Under the half-light environment, increase the voltage of the tie point of voltage control unit 3 and partial pressure unit 2, so that voltage control unit 3 conductings.
The light-operated door status sensor of present embodiment can be realized conducting state with passive form under the half-light state, state is consistent with former door magnetic, directly substitutes and uses, and network management data does not need to revise.Moreover no matter be that old type tube equipment or the short-circuit current of gate inhibition's port of new model equipment are from the mA level to the uA level, but the light-operated door status sensor of present embodiment successful Application all on all devices of existing network different manufacturers, and on present on the market alarm device gate inhibition's port to use also be successfully.
Provided a kind of fundamental diagram of gate inhibition's examples of ports among Fig. 3, as can see from Figure 3, gate inhibition's port can adopt the mode of switch, also can adopt the mode of adjusting the resistance between gate inhibition's port, when the resistance of gate inhibition's port is lower than preset value, when namely being in low resistive state, inner optocoupler conducting, the level signal that gathers in voltage acquisition point A place is low level, means normal condition.And if the resistance of gate inhibition's port is higher than preset value, when namely being in high-impedance state, inner optocoupler cut-off, the level signal that voltage acquisition point A place gathers is high level, means alarm status.
Present embodiment becomes voltage control unit and the required supply voltage of partial pressure unit with the voltage of gate inhibition's port by the circuit conversion that commutates, and the positive-negative polarity of input port is not required.And partial pressure unit is designed to high impedance, and voltage control unit leakage current when cut-off is small, thereby makes light-operated door status sensor integral body present high-impedance state under the light state.When partial pressure unit changes at bright dark situation, the output voltage of its variation is used for controlling cut-off and the conducting of voltage control unit, photosensitive device presents low resistive state when light is arranged, make the dividing potential drop on it be not enough to driving voltage control unit, and then cause voltage control unit to be in cut-off state, and light-operated door status sensor integral body is high-impedance state; And photosensitive device presents high-impedance state when little light, dividing potential drop on it makes the voltage control unit conducting, make the voltage drop at gate inhibition's port two ends along with the conducting of voltage control unit, the decline of voltage reduces the dividing potential drop on the photosensitive device, the reducing of dividing potential drop but hinders gate inhibition's port both end voltage and descends, after the dividing potential drop on the photosensitive device is reduced to a certain degree, final sum light-operated door status sensor both end voltage maintains an equilibrium state, be stabilized in a low voltage, this voltage is easy to be lower than 1.5v when selecting suitable voltage control unit.Because the at this moment conducting of voltage control unit, the light-operated door status sensor is low resistive state.
Fig. 2 has provided a kind of physical circuit of Fig. 1 and has realized that wherein voltage control unit is enhancement mode field effect transistor Q1(such as BSH103 etc.), the grid of this enhancement mode field effect transistor Q1 is connected with partial pressure unit.And partial pressure unit comprises upper arm resistance R 1 and the underarm resistance R 2 of series connection, and the grid of enhancement mode field effect transistor Q1 is connected between upper arm resistance R 1 and the underarm resistance R 2, and underarm resistance R 2 is photoresistance (such as the photoresistance of GL5528 type etc.).The resistance in the dark of photoresistance is not less than 1M Ω, and bright resistance is about 10K, and the resistance of upper arm resistance R 1 can be for greater than 1M Ω.Selecting in the resistance of selecting R1 can not be excessive, too sensitive to avoid the light-operated door status sensor.
In Fig. 2, the unit that commutates is full bridge rectifier, comprise the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, wherein the negative pole of the 4th diode D4 links to each other with the positive pole of the first diode D1, the negative pole of the 3rd diode D3 links to each other with the positive pole of the second diode D2, the positive pole of the 4th diode D4 links to each other with the positive pole of the 3rd diode D3, and the negative pole of the first diode D1 links to each other with the negative pole of the second diode D2.In the full bridge rectifier that forms, the tie point of the negative pole of the 4th diode D4 and the positive pole of the first diode D1 and the negative pole of the 3rd diode D3 are drawn respectively two terminals with the tie point of the positive pole of the second diode D2 and are linked to each other with gate inhibition's interface, and the positive pole of voltage control unit and negative pole are connected to the tie point of the positive pole of the positive pole of the tie point of negative pole of the negative pole of the first diode D1 and the second diode D2 and the 4th diode D4 and the 3rd diode D3.Full bridge rectifier can become the voltage transitions of gate inhibition's port the required supply voltage of voltage control unit and partial pressure unit, and the positive-negative polarity of input port is not required.
When the external world has certain brightness, photoresistance presents low resistive state, dividing potential drop in photoresistance is less than the cut-in voltage of enhancement mode field effect transistor Q1 at this moment, enhancement mode field effect transistor Q1 cut-off, this moment, the light-operated door status sensor was equivalent to only have the partial pressure unit of high resistant in work, therefore integral body is high-impedance state, causes the optocoupler cut-off of gate inhibition's port inside, and the level signal that collect at collection point A place this moment is high level.And inside of base station is in darker state, photoresistance then presents high-impedance state, dividing potential drop on it is greater than the cut-in voltage of enhancement mode field effect transistor Q1, make enhancement mode field effect transistor Q1 conducting, and along with the conducting of enhancement mode field effect transistor Q1, so that the voltage drop at light-operated door status sensor two ends, so just reduced the dividing potential drop of photoresistance, and the dividing potential drop of photoresistance reduces the voltage drop that can hinder light-operated door status sensor two ends, after the dividing potential drop of photoresistance is reduced to a certain degree, the voltage stabilization at final light-operated door status sensor two ends is near 1.5v, and because the conducting of enhancement mode field effect transistor Q1, the light-operated door status sensor is low resistive state with the two ends that gate inhibition's port is connected, the optocoupler conducting of gate inhibition's port inside, and the level signal that collect at collection point A place this moment is low level.Determine current normal condition or the alarm status of being in according to the level signal at collection point A place.
As shown in Figure 4, be the structural representation of another embodiment of the utility model light-operated door status sensor.Compare with a upper embodiment, also comprise door status switch 4 in the present embodiment, this door status switch 4 is connected on partial pressure unit 2 and commutates between the unit 1.Fig. 5 has provided a kind of physical circuit and has realized.Present embodiment is with door status sensor and the integrated the whole body of light control sensor, because the two alarm status is consistent, when light occurring and opening the door arbitrary condition, the light-operated door status sensor of present embodiment is high-impedance state, the alarm of gate inhibition's port, and light occurs and open the door two conditions when all not satisfying, then the light-operated door status sensor is low resistive state, gate inhibition's port is normal.So to advance people's monitoring in the base station more effective, go for the timely alarm that more kinds of people enter the base station situation.
In sum, the situation that several embodiment of the utility model light-operated door status sensor can be effectively enter the base station to the people is effectively surveyed, and has avoided infrared sensor of the human body to be subject to ambient temperature effect easily and the situation that produces wrong report occurs.In addition, the utility model light-operated door status sensor need not to install power supply, it can utilize the operating voltage of gate inhibition's port self to carry out work, only two lead-in wires of light-operated door status sensor need be linked to each other with gate inhibition's port when mounted and get final product, and because it is consistent with former door magnetic alarm status, also need not rewiring or increase peripheral circuit.Therefore simple installation uses safety, and saves taking of the space such as power lead.When embodiment surveyed on the 9916 type equipment of base station, Lucent, at the light environment, gate inhibition's port was cut-off, and working current is less than 2.7uA; When the half-light environment, become 3.0uA, the conducting of gate inhibition's port, this self-powered mode of port voltage of utilizing of this explanation can effectively be worked at very low working current.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (6)
1. light-operated door status sensor, it is characterized in that, comprise: the unit that commutates, partial pressure unit and voltage control unit, described voltage control unit links to each other with the unit that commutates with described partial pressure unit respectively, described partial pressure unit links to each other with the described unit that commutates, the described unit that commutates has two terminals and links to each other with gate inhibition's interface respectively, described partial pressure unit has photosensitive device, under the light environment, reduce the voltage of the tie point of described voltage control unit and described partial pressure unit, so that the cut-off of described voltage control unit; Under the half-light environment, increase the voltage of the tie point of described voltage control unit and described partial pressure unit, so that described voltage control unit conducting.
2. light-operated door status sensor according to claim 1 is characterized in that, described voltage control unit is the enhancement mode field effect transistor, and the grid of described enhancement mode field effect transistor is connected with described partial pressure unit.
3. light-operated door status sensor according to claim 2, it is characterized in that, described partial pressure unit comprises upper arm resistance and the underarm resistance of series connection, and the grid of described enhancement mode field effect transistor is connected between described upper arm resistance and the underarm resistance, and described underarm resistance is photoresistance.
4. light-operated door status sensor according to claim 1, it is characterized in that, the described unit that commutates is full bridge rectifier, comprise the first diode, the second diode, the 3rd diode and the 4th diode, the negative pole of wherein said the 4th diode links to each other with the positive pole of the first diode, the negative pole of the 3rd diode links to each other with the positive pole of the second diode, the positive pole of described the 4th diode links to each other with the positive pole of the 3rd diode, and the negative pole of the first diode links to each other with the negative pole of the second diode.
5. light-operated door status sensor according to claim 4, it is characterized in that, the tie point of the negative pole of described the 4th diode and the positive pole of the first diode and the negative pole of described the 3rd diode are drawn respectively two terminals with the tie point of the positive pole of the second diode and are linked to each other with described gate inhibition's interface, and the positive pole of described voltage control unit and negative pole are connected to the tie point of the positive pole of the positive pole of the tie point of negative pole of the negative pole of described the first diode and the second diode and described the 4th diode and the 3rd diode.
6. light-operated door status sensor according to claim 1 is characterized in that, also comprises door status switch, and described door status switch is connected on described partial pressure unit and described commutating between the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220499862.XU CN202795622U (en) | 2012-09-28 | 2012-09-28 | Light-controlled type door magnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220499862.XU CN202795622U (en) | 2012-09-28 | 2012-09-28 | Light-controlled type door magnetic sensor |
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| Publication Number | Publication Date |
|---|---|
| CN202795622U true CN202795622U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220499862.XU Expired - Lifetime CN202795622U (en) | 2012-09-28 | 2012-09-28 | Light-controlled type door magnetic sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700203A (en) * | 2012-09-28 | 2014-04-02 | 中国电信股份有限公司 | Light-operated door magnetic sensor |
| CN112727300A (en) * | 2020-12-22 | 2021-04-30 | 广州征安电子科技有限公司 | Door magnetic switch and control method thereof |
-
2012
- 2012-09-28 CN CN201220499862.XU patent/CN202795622U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700203A (en) * | 2012-09-28 | 2014-04-02 | 中国电信股份有限公司 | Light-operated door magnetic sensor |
| CN103700203B (en) * | 2012-09-28 | 2016-05-11 | 中国电信股份有限公司 | Light-operated door status sensor |
| CN112727300A (en) * | 2020-12-22 | 2021-04-30 | 广州征安电子科技有限公司 | Door magnetic switch and control method thereof |
| CN112727300B (en) * | 2020-12-22 | 2022-08-16 | 广州征安电子科技有限公司 | Door magnetic switch and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20160511 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |