CN107085181A - Direct current dorsad light fiber switch detecting system - Google Patents
Direct current dorsad light fiber switch detecting system Download PDFInfo
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- CN107085181A CN107085181A CN201710234548.6A CN201710234548A CN107085181A CN 107085181 A CN107085181 A CN 107085181A CN 201710234548 A CN201710234548 A CN 201710234548A CN 107085181 A CN107085181 A CN 107085181A
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- timer
- duration
- direct current
- level
- comparator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of direct current dorsad light fiber switch detecting system, belong to sensory field of optic fibre, it includes photo-detector, voltage comparator, edge triggered flip flop, timer, timer, level duration accumulative register, duration comparator and warning device, wherein, photo-detector connects voltage comparator, voltage comparator connects edge triggered flip flop, edge triggered flip flop connects timer and timer simultaneously, timer and timer connect level duration accumulative register simultaneously, level duration accumulative register connects duration comparator, duration comparator connects warning device, timer is also connected with timer.The device of the present invention can be judged high and low level using rising edge and trailing edge both edging trigger signals, compare high level in the data slot of setting duration and continue total duration and the lasting total duration of low level, so that Switch detection system is no longer sensitive to the light loss of direct current optical signal, detect more accurate, better adaptability.
Description
Technical field
The invention belongs to sensory field of optic fibre, more particularly, to a kind of direct current dorsad light fiber switch detecting system.
Background technology
Existing fiber switch detection method directly using direct current dorsad light low and high level come judge fiber switch sense
The folding condition amount of device.The antijamming capability of the detection method is poor, and its reason is mainly that direct current dorsad light and is converted
Electric signal is easily by noise jamming.
In addition, the detection method is by the way of fixed threshold judgement, when the loss of light path is excessive due to direct current dorsad
The luminous power of light is less than threshold value, easily causes detection method failure.
Accordingly, it would be desirable to develop a kind of new direct current dorsad light fiber switch detecting system or method, it is desirable to which it has
Preferable antinoise signal interference performance, and it is insensitive or will not be due to on fibre circuit to the optical power loss on fibre circuit
Optical power loss and fail.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of direct current, dorsad light fiber switch is examined
Examining system, it is intended that by set edge triggered flip flop, timer, timer, level duration accumulative register, when
Long comparator, judges low and high level using rising edge and trailing edge both edging trigger signals, when relatively more fixed
High level continues total duration and continues total duration with low level in long data slot so that Switch detection system is to direct current optical signal
Light loss it is no longer sensitive, detect more accurate, better adaptability.
To achieve the above object, the invention provides a kind of direct current dorsad light fiber switch detecting system, it includes light spy
Survey device, voltage comparator, edge triggered flip flop, timer, timer, level duration accumulative register, duration comparator with
And warning device, wherein,
The photo-detector connects the voltage comparator, and the voltage comparator connects the edge triggered flip flop, described
Edge triggered flip flop connects the timer and the timer simultaneously, and the timer and the timer connect the electricity simultaneously
Flat duration accumulative register, the level duration accumulative register connects the duration comparator, the time length ratio
The warning device is connected compared with device, the timer is also connected with the timer,
The photo-detector be used for by the direct current light received be converted to DC signal and export to the voltage ratio compared with
Device, the voltage comparator is used to the DC signal received is converted into direct current square-wave signal and exported to the edge to touch
Device is sent out, the trigger is used for according to the direct current square-wave signal generation edging trigger signal received and transmits it to institute respectively
Timer and the timer are stated, the edging trigger signal includes rising edge edging trigger signal and trailing edge edging trigger is believed
Number, the timer is used for after the edging trigger signal is received the countdown for carrying out setting duration, and the timer is used
In carrying out timing after the edging trigger signal is received, the timer is additionally operable to deposit to the level duration is cumulative
Reservoir transmits high level lasting time and low duration, and the level duration accumulative register is used for cumulative acquisition
High level aggregated duration and low level aggregated duration, and the high and low level aggregated duration is stored, it is described fixed
When device be additionally operable to pass to the timer and the level duration accumulative register after the countdown of setting duration terminates
Defeated timing end signal, is moved with terminating the timing of the timer and the cumulative storage of the level duration accumulative register
Make, it is accumulative lasting that the duration comparator is used to compare the high level aggregated duration and the low level in setting duration
Time, and alarm signal is sent to warning device according to comparative result.
Further, in addition to amplifier, the amplifier be connected to the photo-detector and the voltage comparator it
Between, for being transmitted after DC signal is amplified to voltage comparator.
Further, the warning device includes local alarm and network adapter.
Further, the alarm is alarmed in the form of sound, light or/and electricity.
Further, the network adapter is wirelessly connected to service end, so that service end is with SMS short message, electronics
Mail or map APP form are alarmed.
Further, the setting duration of the timer is less than or equal to 2s.
Further, a length of 1s during the setting of the timer.
Further, a length of 500ms during the setting of the timer.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
In the present invention, by setting edge triggered flip flop, rising edge and trailing edge in direct current square-wave signal can be accurately known,
By setting timer, timer, level duration accumulative register and duration comparator, and timer and timer
Be connected simultaneously with level duration accumulative register, timer is also connected with timer simultaneously, such setting, using comparing
Set high level in the data slot of duration and continue total duration and the lasting total duration of low level so that Switch detection system is to direct current
The loss of optical signal is no longer sensitive, with preferable antinoise signal interference performance and accuracy.In addition, utilizing rising edge and trailing edge
Both edging trigger signals are judged low and high level so that light work(of the Switch detection system no longer to low and high level signal
Rate, which is made, to be severe in judgment, and such detecting system is no longer sensitive to the optical power loss on fibre circuit or because on fibre circuit
Optical power loss and fail, even if detecting system be under severe installation environment also have well adapting to property.
Brief description of the drawings
Fig. 1 is the structural representation of direct current dorsad light fiber switch detecting system in the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of direct current dorsad light fiber switch detecting system method of work in the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
Fig. 1 is the structural representation of direct current dorsad light fiber switch detecting system in the embodiment of the present invention, has figure to understand, this
Invention provides a kind of direct current dorsad light fiber switch detecting system, and it includes photo-detector, voltage comparator, edging trigger
Device, timer, timer, level duration accumulative register, duration comparator and warning device.
Wherein, the photo-detector output end connects the voltage comparator input, the voltage comparator output end
The edge triggered flip flop input is connected, the edge triggered flip flop output end connects the timer input and the meter simultaneously
When device first input end, the output end of timer first and the timer output end connect the level duration simultaneously
Accumulative register input, the level duration accumulative register output end connects the duration comparator input terminal, institute
State duration comparator output terminal and connect the warning device input, the output end of timer second is also connected with the timer
The second input.The input of the photo-detector is used for the direct current light for receiving the external world.
Detailed, the photo-detector is used to the direct current light received being converted to DC signal and exported to the electricity
Comparator input terminal is pressed, the voltage comparator is used to the DC signal received is converted into direct current square-wave signal and exported
To the edge triggered flip flop input, the trigger is used for according to the direct current square-wave signal generation edging trigger signal received
And the timer input and the timer first input end are transmitted it to respectively.The edging trigger signal includes upper
Rise along edging trigger signal and trailing edge edging trigger signal.The timer is used for after the edging trigger signal is received
The countdown of setting duration is carried out, the timer is used to carry out timing, the meter after the edging trigger signal is received
When device be additionally operable to transmit high level lasting time and low duration to the level duration accumulative register, it is described
Level duration accumulative register is used for cumulative acquisition high level aggregated duration and low level aggregated duration, and deposits
Store up the high and low level aggregated duration.The timer is additionally operable to after the countdown of setting duration terminates to the meter
When device and level duration accumulative register transmission timing end signal, to terminate the timing of the timer and described
The cumulative storage action of level duration accumulative register.The duration comparator is used to compare the high electricity in setting duration
Flat aggregated duration and the low level aggregated duration, and alarm signal is sent to warning device according to comparative result.
In one embodiment of the invention, in addition to amplifier, the amplifier in is connected to the optical detection
Device output end, the output end of the amplifier connects the input amplifier of the voltage comparator for DC signal to be put
Transmitted after big to voltage comparator.Pass through the amplification of amplifier so that the DC signal signal of acquisition is stronger.
In another embodiment of the present invention, the warning device includes local alarm and network adapter.Described
Ground alarm is alarmed in the form of sound, light or/and electricity.The network adapter is wirelessly connected to service end, for clothes
Alarmed in the form of SMS short message, Email or map APP at business end.
In another embodiment of the present invention, the setting duration of the timer is less than or equal to 2s, as preferred, typically
A length of 1s during the setting of the timer, is used as further preferred, a length of 500ms during the setting of the timer.
Fig. 2 is the schematic flow sheet of direct current dorsad light fiber switch detecting system method of work in the embodiment of the present invention, by
Figure understands that the method for work of present system comprises the following steps：
S1：DC signal will be converted into by the direct current optical signal of fiber switch sensor using photo-detector；
S2：DC signal is amplified using amplifier；
S3：DC signal is converted into by direct current square-wave signal using voltage comparator；
S4：Edge triggered flip flop generates current edge trigger signal according to direct current square-wave signal, by current edge trigger signal
It is distributed to timer and timer simultaneously；
S5：Timer starts the countdown of current setting duration after current edge trigger signal is received and no longer received
Other edging trigger signals, a length of 1s or 500ms during the current setting of timer, timer is receiving current edge triggering
After signal, last time level timing result is sent to level duration accumulative register, and resets timer, then to current
Level in the corresponding current setting duration of edging trigger signal re-starts timing；
S6：When level duration accumulative register continues to high level duration in current setting duration and low level
It is long to carry out cumulative summation respectively, duration and the setting duration are added up with the interior high level for obtaining current setting duration respectively
Interior low level duration；
S7：Judge whether the countdown of timer terminates,
If the countdown of timer terminates, into step S8,
If the countdown of timer is not over, step S6 is jumped to；
S8：Timer stops timing, and timer is reset, the cumulative holder stopping accumulation calculating of level duration, and to
High and low level adds up duration in the current setting duration of duration comparator transmission, then empties memory；
S9：When high level adds up duration and accumulative lasting low level in the current setting duration of duration comparator acquisition
It is long；
S10：Compare the low level in currently setting duration and add up duration and the accumulative duration of high level, worked as
Preceding direct current dorsad light fiber switch state；
S11：By network adapter, to server end or directly to local alarm transmission direct current, dorsad light optical fiber is opened
The state of pass.The local alarm is alarmed in the form of sound, light or/and electricity.The network adapter wireless connection
To service end, so that service end is alarmed in the form of SMS short message, Email or map APP.
In direct current dorsad light, high level represents dorsad light presence, and dorsad light, which exists, just illustrates that the thang-kng of sensor is normal；
Low level represents that dorsad light is not present, and dorsad light, which is not present, just illustrates that the thang-kng of sensor is blocked.
In the present invention, the edging trigger signal of rising edge edging trigger signal and trailing edge is edge triggered flip flop according to electricity
Pressure is obtained with the curve of time relationship, when occurring the slope of flex point and the flex point in voltage and time curve for just,
Then rising edge edging trigger signal occurs in explanation, when voltage in time curve with flex point and the slope of the flex point occur
It is negative, then explanation occurs lower liter along edging trigger signal.
In the present invention, it is used, and high level continues total duration in the data slot for comparing setting duration and low level continues always
Duration so that loss of the Switch detection system to direct current optical signal is no longer sensitive, with preferable antinoise signal interference performance and standard
True property.In addition, being judged using rising edge and trailing edge both edging trigger signals low and high level so that switch detection
System is no longer made to the luminous power of low and high level signal and is severe in judgment, and such detecting system is no longer to the light work(on fibre circuit
Rate loss is sensitive or is failed because of the optical power loss on fibre circuit, even if detecting system is under severe installation environment
Also there is well adapting to property.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (8)
1. a kind of direct current dorsad light fiber switch detecting system, it is characterised in that it includes photo-detector, voltage comparator, side
Along trigger, timer, timer, level duration accumulative register, duration comparator and warning device, wherein,
The photo-detector connects the voltage comparator, and the voltage comparator connects the edge triggered flip flop, the edge
Trigger connects the timer and the timer simultaneously, and the timer and the timer connect the level simultaneously and held
Continuous time accumulative register, the level duration accumulative register connects the duration comparator, the duration comparator
The warning device is connected, the timer is also connected with the timer.
2. direct current as claimed in claim 1 dorsad light fiber switch detecting system, it is characterised in that the photo-detector is used for
The direct current light received is converted into DC signal and exported to the voltage comparator,
The voltage comparator is used to the DC signal received being converted into direct current square-wave signal and exported to the edge
Trigger, the trigger is used for according to the direct current square-wave signal generation edging trigger signal received and transmitted it to respectively
The timer and the timer, the edging trigger signal include rising edge edging trigger signal and trailing edge edging trigger
Signal,
The timer is used for after the edging trigger signal is received the countdown for carrying out setting duration, and the timer is used
In carrying out timing after the edging trigger signal is received,
The timer is additionally operable to transmit high level lasting time to the level duration accumulative register and low level is held
The continuous time,
The level duration accumulative register is used for cumulative acquisition high level aggregated duration and low level is accumulative lasting
Time, and store the high and low level aggregated duration,
The timer is additionally operable to tired to the timer and the level duration after the countdown of setting duration terminates
Plus memory transmission timing end signal, with the timing for terminating the timer and the level duration accumulative register
Cumulative storage action,
The duration comparator, which is used to compare the high level aggregated duration and the low level in setting duration, to be added up to hold
The continuous time, and alarm signal is sent to warning device according to comparative result.
3. direct current as claimed in claim 2 dorsad light fiber switch detecting system, it is characterised in that also including amplifier, institute
State amplifier to be connected between the photo-detector and the voltage comparator, for transmitting after DC signal is amplified to electricity
Press comparator.
4. direct current as described in one of claim 1-3 dorsad light fiber switch detecting system, it is characterised in that the alarm is set
It is standby to include local alarm and network adapter.
5. direct current as claimed in claim 4 dorsad light fiber switch detecting system, it is characterised in that the alarm is used
The form of sound, light or/and electricity is alarmed.
6. direct current as claimed in claim 4 dorsad light fiber switch detecting system, it is characterised in that the network adapter without
Line is connected to service end, so that service end is reported in the form of SMS short message short message, Email or map APP
It is alert.
7. direct current as described in one of claim 1-3 dorsad light fiber switch detecting system, it is characterised in that the timer
Setting duration be less than or equal to 2s.
8. direct current as described in one of claim 1-3 dorsad light fiber switch detecting system, it is characterised in that the timer
Setting when a length of 1s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234548.6A CN107085181B (en) | 2017-04-12 | 2017-04-12 | Direct current is backwards to light fiber switch detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234548.6A CN107085181B (en) | 2017-04-12 | 2017-04-12 | Direct current is backwards to light fiber switch detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107085181A true CN107085181A (en) | 2017-08-22 |
| CN107085181B CN107085181B (en) | 2019-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710234548.6A Active CN107085181B (en) | 2017-04-12 | 2017-04-12 | Direct current is backwards to light fiber switch detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248218A (en) * | 2016-08-31 | 2016-12-21 | 宁波智轩物联网科技有限公司 | A kind of human body detection device and determination methods thereof |
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| JPH07212208A (en) * | 1994-01-27 | 1995-08-11 | Hokuyo Automatic Co | Optical fiber type photoelectric switch |
| CN1312477A (en) * | 2001-03-19 | 2001-09-12 | 上海鹰泰机电有限公司 | Optical fiber switch device |
| CN103135055A (en) * | 2013-02-04 | 2013-06-05 | 丰唐物联技术（深圳）有限公司 | Method of distinguishing type of external-connection switch of intelligent device |
| CN204287425U (en) * | 2014-12-23 | 2015-04-22 | 西安科技大学 | Mine Switch operating condition observation circuit |
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2017
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Patent Citations (6)
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| JPH01211717A (en) * | 1988-02-19 | 1989-08-24 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber switch |
| JPH07212208A (en) * | 1994-01-27 | 1995-08-11 | Hokuyo Automatic Co | Optical fiber type photoelectric switch |
| CN1312477A (en) * | 2001-03-19 | 2001-09-12 | 上海鹰泰机电有限公司 | Optical fiber switch device |
| CN103135055A (en) * | 2013-02-04 | 2013-06-05 | 丰唐物联技术（深圳）有限公司 | Method of distinguishing type of external-connection switch of intelligent device |
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| CN106248218A (en) * | 2016-08-31 | 2016-12-21 | 宁波智轩物联网科技有限公司 | A kind of human body detection device and determination methods thereof |
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| Publication number | Publication date |
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| CN107085181B (en) | 2019-08-16 |
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