CN207440315U - A kind of photoelectric detection system - Google Patents
A kind of photoelectric detection system Download PDFInfo
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- CN207440315U CN207440315U CN201721601844.7U CN201721601844U CN207440315U CN 207440315 U CN207440315 U CN 207440315U CN 201721601844 U CN201721601844 U CN 201721601844U CN 207440315 U CN207440315 U CN 207440315U
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Abstract
The embodiment of the utility model provides a kind of photoelectric detection system, is related to photoelectric detection technology field, it can be achieved that signal is synchronous, and can preferably improve signal distortion, the problems such as the unstable of signal, signal are disturbed.A kind of photoelectric detection system, including light emitting module, by optical module and control module；Light emitting module includes the luminescence unit for emitting optical signal, is included corresponding with luminescence unit by optical module and is used to receive the light receiving unit of optical signal；Light emitting module further includes logic control element；Logic control element is used for the clock signal sent according to control module, and the clock signal is modulated to obtain the first initial signal；Control module is used to generate the clock signal in the data cycle of each signal period, and sends the clock signal simultaneously to light emitting module and by optical module；Second initial signal synchronous with first initial signal is generated according to the feature of the first initial signal, is sent to by optical module.
Description
Technical field
The utility model is related to photoelectric detection technology field more particularly to a kind of photoelectric detection systems.
Background technology
Optoelectronic detecting device can be distributed in multilayer object there are situations to judge.
If any multilager base plate vertical distribution, it is necessary to which whether certain layer has substrate in detection container, just in a case
Other equipment can be made to carry out subsequent operation, it is therefore desirable to successively be judged, and all be sent out by a pair the detection of each laminar substrate
Light unit and light receiving unit carry out.Since all luminescence units are distributed in light emitting module, all light receiving units are distributed in light
In module, it is then desired to input it is synchronous with the signal by optical module to the light emitting module of optoelectronic detecting device so as to each layer
The detection of substrate successively carries out.
Current way is, as shown in Figure 1, using cable (tens of meters of distances) by light emitting module 10 and by optical module 20
The synchronization of signal is realized in connection, but clock signal, initial signal are easy to cause signal distortion, letter all using cable synchronous transfer
Number unstable, signal it is disturbed the defects of.Wherein, light emitting module 10 makes what it included according to initial signal and clock signal
Luminescence unit shines successively；By optical module 20 according to initial signal and clock signal, the light receiving unit that making it includes is sequentially output
Signal.
Utility model content
The embodiment of the utility model provides a kind of photoelectric detection system, it can be achieved that signal is synchronous, and can preferably improve
The problems such as signal distortion, the unstable of signal, disturbed signal.
In order to achieve the above objectives, the embodiment of the utility model adopts the following technical scheme that：
A kind of photoelectric detection system is provided, including light emitting module, by optical module and control module；The light emitting module includes
It is described to be included corresponding with the luminescence unit by optical module and for receiving light letter for emitting the luminescence unit of optical signal
Number light receiving unit；The light emitting module further includes logic control element；The logic control element is used for according to the control
The clock signal that module is sent, is modulated the clock signal to obtain the first initial signal；The control module is used for
The data cycle of each signal period generates the clock signal, and described is sent simultaneously to the light emitting module and by optical module
The clock signal；The second starting letter synchronous with first initial signal is generated according to the feature of first initial signal
Number, it is sent to described by optical module.
Preferably, the light emitting module further includes the first shift LD module, described to be further included the second displacement by optical module
Registration module；The first shift LD module, under the driving of the clock signal, according to first initial signal
The luminescence unit timesharing is controlled to carry out optical signal launch；The second shift LD module, in the clock signal
Under driving, according to second initial signal light receiving unit is controlled to carry out signal output, the light receiving unit and transmitting light letter
Number the luminescence unit correspond to.
Preferably, the logic control element includes count sub-element, decoding subelement, selection subelement, data holding
Subelement and reset subelement；The count sub-element is used to count the rising edge or trailing edge of the clock signal；
The input terminal of the decoding subelement is connected with the output terminal of the count sub-element, and the decoding subelement is used to input it
The signal at end is exported into row decoding；The input terminal of the selection subelement is connected with the output terminal of the decoding subelement, described
The output terminal of subelement is selected with the data subelement to be kept to be connected, the selection subelement is used to make the decoding subelement
An output terminal output decoded signal input to the data keep subelement；Wherein, one of the decoding subelement
The decoded signal of output terminal output is always maintained at after reaching corresponding count value and carrying out signal overturning until counting is single
Member is reset；The count value is equal to the number of all luminescence units in the light emitting module；The data keep son single
Member was used to the signal of a upper clock cycle for the decoded signal remaining to present clock period, output first starting
Signal；When the reset subelement is by based on a signal period completely, the count sub-element is resetted.
It is further preferred that the logic control element further includes shaping unit, input terminal connects with the control module
It connects, output terminal is connected with the count sub-element and the reset subelement；The shaping unit is used for the clock signal
Carry out noise reduction process.
Preferably, the control module generates same with first initial signal according to the feature of first initial signal
Second initial signal of step, including：The control module is based on first signal period useless principle that need to give up, according to described
First initial signal generates a clock since second signal period, in first clock cycle of each signal period
The feature of the pulse signal of width generates second initial signal synchronous with first initial signal.
Preferably, the control module is additionally operable to, in the invalid data cycle of each signal period, stop to described
Light emitting module and it is described sent the clock signal by optical module, until a signal period meter is full；It is described to translate based on this
The decoded signal of the output terminal output of numeral unit is always maintained at straight after reaching corresponding count value and carrying out signal overturning
It is reset to the count sub-element, including：The decoded signal of the output terminal output of the decoding subelement is reaching phase
After the count value answered carries out signal overturning and continues certain clock cycle, into the invalid data cycle, make the decoding
The current potential of signal continues maintained until the count sub-element is reset.
Optionally, the shaping unit is Schmidt trigger；The decoding subelement is address decoder；The selection
Subelement is toggle switch；It is d type flip flop that the data, which keep subelement and the reset subelement,.
The embodiment of the utility model provides a kind of photoelectric detection system, by increasing logic control list in light emitting module
Member is modulated to obtain the first initial signal according to clock signal by logic control element, and is believed by control module according to the first starting
Number feature generate second initial signal synchronous with the first initial signal and be sent to by optical module, so as to ensure luminescence unit by
Layer transmitting optical signal, while the carry out signal output that light receiving unit corresponding with the luminescence unit is synchronous.Wherein, although clock is believed
Number cable transmission is needed, but middle clock signal and initial signal all by cable transmission, can substantially improve clock compared with the prior art
The problems such as signal distortion, unstable, signal are disturbed so that the stability of clock signal transmission increases, moreover, because the first
Beginning signal and the second initial signal influence from cable transmission, can be to avoid signal delay, interference the problem of, therefore so that the
One initial signal is synchronous more reliable with the second initial signal；Further, since only needing transmission clock signal, thus it can also reduce line
Cable quantity saves cost, easy access.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of schematic diagram for photoelectric detection system that the prior art provides；
Fig. 2 is a kind of schematic diagram one of photoelectric detection system provided by the utility model；
Fig. 3 is a kind of schematic diagram two of photoelectric detection system provided by the utility model；
Fig. 4 is a kind of schematic diagram one of first shift LD module provided by the utility model；
Fig. 5 is a kind of schematic diagram two of first shift LD module provided by the utility model；
Fig. 6 is a kind of schematic diagram one of logic control element provided by the utility model；
Fig. 7 is a kind of schematic diagram two of logic control element provided by the utility model；
Fig. 8 is a kind of schematic diagram three of photoelectric detection system provided by the utility model；
Fig. 9 is the signal schematic representation of each subelement output in logic control element provided by the utility model；
Figure 10 is the schematic diagram of the second initial signal of control module provided by the utility model output.
Reference numeral：
10- light emitting modules；20- is by optical module；30- control modules；101- luminescence units；102- logic control elements；
103- the first shift LD modules；201- light receiving units；202- the second shift LD modules；1021- shaping units；1022- is counted
Number subelement；1023- decodes subelement；1024- selects subelement；1025- data keep subelement；1026- resets subelement.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
The utility model embodiment provides a kind of photoelectric detection system, as shown in Fig. 2, including：Light emitting module 10, by optical mode
Block 20 and control module 30；Light emitting module 10 includes the luminescence unit 101 for emitting optical signal, is included and hair by optical module 20
Light unit 101 corresponds and the light receiving unit 201 for receiving optical signal；Light emitting module 10 further includes logic control element
102；Logic control element 102 is used for the clock signal sent according to control module 30, and the clock signal is modulated
To the first initial signal；Control module 30 is used to generate the clock signal in the data cycle of each signal period, and simultaneously
The clock signal is sent to light emitting module 10 and by optical module 20；According to the feature of first initial signal generate with it is described
Second initial signal of the first initial signal synchronization, is sent to by optical module 20.
It is understood that light emitting module 10 can only include a luminescence unit 101, in the case, by optical module
20 also include a light receiving unit 201, and a luminescence unit 101 and a light receiving unit 201 correspond to.Light emitting module 10 also may be used
Including multiple luminescence units 101, in the case, included the light receiving unit equal with 101 numbers of luminescence unit by optical module 20
201, and luminescence unit 101 and light receiving unit 201 correspond.
Wherein, one-to-one a pair of of luminescence unit 101 and light receiving unit 201 can be used for article on one layer of luggage carrier of detection
There are situations.
Due to luggage carrier under normal circumstances, for multilayered structure, (such as n-layer, n are more than 1), if every layer of luggage carrier is correspondingly arranged one
To luminescence unit 101 and light receiving unit 201, then the number of corresponding luminescence unit 101 and light receiving unit 201 is also n, and right
When every layer of article is detected there are situation, luminescence unit 101 only corresponding with current layer shines, and light receiving unit 201 connects
It receives light and exports signal, just can guarantee the accuracy of detection, therefore, this just needs light emitting module 10 and can be received by optical module 20
To synchronous initial signal and clock signal, so as to which 101 timesharing of luminescence unit successively carries out optical signal launch, make and the hair
101 corresponding light receiving unit 201 of light unit carries out signal output.
It should be noted that first, it will be understood by those skilled in the art that due to light receiving unit 201 receiving optical signal and
When exporting signal, control module 30 signal such as can analyze and process, and therefore, control module 30 can be close to by optical module 20
It sets, so that control module 30 and light emitting module 10 is distant.
In the case, the clock signal that light emitting module 10 receives, then need cable to be transmitted.
Second, each signal period in addition to including the data cycle, further includes the invalid data cycle, in the invalid data cycle,
Control module 30 no longer generates normal clock pulse signal, but can be always maintained at such as low level output, therefore, in data week
At the end of phase, control module 30 is simultaneously stopped to light emitting module 10 and by 20 tranmitting data register signal of optical module, until a signal
Until week expires.
3rd, for control module 30, the first initial signal need not be obtained, because by logic control element
102 design, output the first initial signal be it is known, thus, control module 30 can be according to the known the first
The feature of beginning signal and generate the second initial signal.
The utility model embodiment provides a kind of photoelectric detection system, by increasing logic control list in light emitting module 10
Member 102 modulates to obtain the first initial signal by logic control element 102 according to clock signal, and by control module 30 according to the
The feature of one initial signal generates second initial signal synchronous with the first initial signal and is sent to by optical module 20, so as to ensure
Luminescence unit 101 successively emits optical signal, while the carry out signal synchronous with the 101 corresponding light receiving unit 201 of luminescence unit
Output.Wherein, although clock signal needs cable transmission, middle clock signal and initial signal are all by cable compared with the prior art
Transmission can substantially improve the problems such as clock signal distorts, is unstable, signal is disturbed so that the stability of clock signal transmission
Increase, it, can be to avoid signal delay, dry moreover, because the first initial signal and the second initial signal influence from cable transmission
The problem of disturbing, therefore so that the first initial signal is synchronous more reliable with the second initial signal；Further, since when only needing transmission
Clock signal, thus number of cables can be also reduced, save cost, easy access.
Preferably, as shown in figure 3, light emitting module 10 further includes the first shift LD module 103, further included by optical module 20
Second shift LD module 202；First shift LD module 103, under the driving of the clock signal, according to described
One initial signal, 101 timesharing of control luminescence unit carries out optical signal launch；Second shift LD module 202, for when described
Under the driving of clock signal, according to second initial signal light receiving unit 201 is controlled to carry out signal output, the light receiving unit 201
It is corresponding with the luminescence unit 101 for emitting optical signal.
Wherein, the first shift LD module 103 can include at least one shift register, when including multiple shift LDs
During device, multiple shift registers cascade successively.
As shown in Figure 4 and Figure 5, each shift register includes clock signal input terminal CLK and initial signal input terminal
DAT and M output terminal QP1~QPM, M >=2.
When the first shift LD module 103 include a shift register when, as shown in figure 4, the shift register when
Clock signal input part CLK input clock signals, initial signal input terminal DAT input the first initial signal, each luminescence unit 101
An output terminal is connected, and the output terminal that each luminescence unit 101 connects is different.Based on this, by each output terminal successively
The luminescence unit 101 that output shift signal control is connected with corresponding output end emits optical signal.
When the first shift LD module 103 includes multiple shift registers, as shown in figure 5, two neighboring shift LD
The m-th output terminal QP of the initial signal input terminal DAT of the latter shift register and previous shift register in deviceMPhase
Even, the clock signal input terminal CLK input clock signals of each shift register, the initial signal of first shift register are defeated
Enter to hold DAT to input the first initial signal.
Similar, the second shift LD module 202 can include at least one shift register, when including multiple displacements
During register, multiple shift registers cascade successively.
When the second shift LD module 202 includes a shift register, the clock signal input of the shift register
CLK input clock signals are held, initial signal input terminal DAT inputs the second initial signal, and each connection of light receiving unit 201 one is defeated
Outlet, and the output terminal that each light receiving unit 201 connects is different.Based on this, displacement letter is sequentially output by each output terminal
Number control be connected with corresponding output end light receiving unit 201 output signal.
When the second shift LD module 202 includes multiple shift registers, the latter in two neighboring shift register
The initial signal input terminal DAT of the shift register and m-th output terminal QP of previous shift registerMIt is connected, it is each to shift
The clock signal input terminal CLK input clock signals of register, the initial signal input terminal DAT inputs of first shift register
Second initial signal.
Wherein, can be seen that only to the description of the first shift LD module 103 and the second shift LD module 202
First initial signal is synchronous with the second initial signal, in the case of clock signal synchronization, just can guarantee that luminescence unit 101 is successively sent out
Optical signal is penetrated, the carry out signal output synchronous with the 101 corresponding light receiving unit 201 of luminescence unit.
Preferably, as shown in fig. 6, logic control element 102 includes count sub-element 1022, decoding subelement 1023, choosing
Subelement 1024 is selected, data keep subelement 1025 and resets subelement 1026.
Specifically, count sub-element 1022 is used to count the rising edge or trailing edge of the clock signal.
The input terminal of decoding subelement 1023 is connected with the output terminal of count sub-element 1022, and decoding subelement 1023 is used for
The signal of its input terminal is exported into row decoding.
Herein it should be noted that when the input terminal number of decoding subelement 1023 is less than the output of count sub-element 1022
When holding number, the output terminal of selectable portion count sub-element 1022 and the input terminal of decoding subelement 1023 are corresponded and connected
It connects.It wherein, should be with the photoelectricity when the output terminal of count sub-element 1022 is selected to be connected with decoding the input terminal of subelement 1023
The number of plies of the luggage carrier detected in detection device practical application, which output of selection count sub-element 1022 determined
End, as long as the counting after these ports individually count or are superimposed can reach the required detection number of plies.
For example, if the number of plies of the luggage carrier detected in photoelectric detection system practical application is 24 layers, can at least select
Select the Q of count sub-element 10223And Q4End, because Q3End is that high level is exported when counting down to 8, and continues 8 count values (i.e. 8
Clock cycle) after become low level, then continue to become high level, Q again after 8 count values4End is that high electricity is exported when counting down to 16
It is flat, and become low level after continuing 16 count values (i.e. 16 clock cycle), thus work as Q3And Q4End exports high level simultaneously
When, then it count down to 24.On this basis, according to the number of plies for the luggage carrier for being also possible to detection, to select count sub-element 1022
Other output terminals.
The input terminal of subelement 1024 is selected to be connected with decoding the output terminal of subelement 1023, selects the defeated of subelement 1024
Outlet keeps subelement 1025 to be connected with data, selects subelement 1024 for making an output terminal of decoding subelement 1023 defeated
The decoded signal gone out inputs to data and keeps subelement 1025；Wherein, the output terminal output of the decoding subelement 1023
Decoded signal after reaching corresponding count value and carrying out signal overturning, be always maintained at until count sub-element 1022 is reset；
The count value is equal to the number of all luminescence units 101 in light emitting module 10, i.e. count value is equal to the number of plies of luggage carrier.
It should be noted that when the input terminal number of selection subelement 1024 is a less than the output terminal of decoding subelement 1023
During number, the output terminal of selectable portion decoding subelement 1023 is with selecting the input terminal of subelement 1024 to correspond and being connected.
For selection subelement 1024, effect is exactly the only one output terminal output of selection decoding subelement 1023
Decoded signal, thus, it selects each input terminal in subelement 1024 that can connect a switch, switches on or close by control
It closes, the decoded signal all the way to realize only one output terminal can be output.Which specific output terminal can export decoded signal, Ying You
Depending on the number of plies of actually detected luggage carrier.
Preferably, the decoded signal of the output terminal output of the decoding subelement 1023 is reaching corresponding count value
After carrying out signal overturning, it is always maintained at being reset up to count sub-element 1022, including：One of the decoding subelement 1023
The decoded signal of output terminal output enters after reaching corresponding count value progress signal overturning and continuing certain clock cycle
The invalid data cycle makes the current potential of decoded signal continue maintained until count sub-element 1022 is reset.Wherein it is possible to understand
It is, herein into the invalid data cycle, i.e. be by control module 30 after some count value, no longer generate normal clock
Pulse signal, and enter the invalid data cycle.
Data kept subelement 1025 for the signal of a upper clock cycle for the decoded signal to be remained to currently
Clock cycle exports first initial signal.That is, data keep the signal level of 1025 present clock period of subelement to be equal to
The signal level of a upper clock cycle for decoded signal.
When resetting subelement 1026 by based on a signal period completely, reset count subelement 1022.
It, can be according to the number of plies of actually detected luggage carrier, it is only necessary to control selections subelement in the utility model embodiment
It respectively switches on or closes in 1024, you can be flexibly adjusted.
Preferably, as described in Figure 7, the logic control element 102 further includes shaping unit 1021, input terminal and control
Module 30 connects, and output terminal is connected with count sub-element 1022 and reset subelement 1026；The shaping unit 1021 for pair
The clock signal carries out noise reduction process.
Due to after cable transmission, the noises such as distortion, burr can be generated in clock signal, by shaping unit 1021,
Comparatively ideal clock signal waveform can be obtained.
Preferably, control module 30 generates synchronous with first initial signal according to the feature of first initial signal
The second initial signal, including：The control module 30 is based on first signal period useless principle that need to give up, according to described
First initial signal generates a clock since second signal period, in first clock cycle of each signal period
The feature of the pulse signal of width generates second initial signal synchronous with first initial signal.
An embodiment is provided below to describe a kind of specific photoelectric detection system, for detecting article on 24 layers of luggage carrier
Situation.
As shown in figure 8, the photoelectric detection system includes：Light emitting module 10, by optical module 20 and control module 30；Shine mould
Block 10 includes 24 luminescence units 101, is included 24 light receiving units 201, light receiving unit 201 and luminescence unit by optical module 20
101 correspond.Control module 30 is used to generate clock signal in the data cycle of each signal period, and simultaneously to luminous mould
Block 10 and sent the clock signal by optical module 20.
Light emitting module 10 further includes logic control element 102, and logic control element 102 includes shaping unit 1021, logic
Count sub-element 1022, decoding subelement 1023, selection subelement 1024, data keep subelement 1025 and reset subelement
1026。
Shaping unit 1021 can be Schmidt trigger, be connected with control module 30, for believing the clock received
Number carry out noise reduction process after, obtain preferable waveform.
Count sub-element 1022 can be 12 digit counters, and input terminal is connected with shaping unit 1021, for shaping
The trailing edge of clock signal afterwards is counted.
Wherein, 12 output terminals of count sub-element 1022, are denoted as Q respectively0~Q11, each port output counts all the way to be believed
Number.When the trailing edge to the clock signal counts, counted 1 time in the trailing edge of each clock cycle, such as 8 clocks
16 are counted as after 8,16 clock cycle trailing edges are counted as after cycle trailing edge.Each output terminal QxIt is counting down to 2xWhen output it is high
Level, and continue 2xAfter become low level, then continue 2xBecome high level again afterwards, so again and again, until counting down to data week
Until phase terminates, wherein, 0≤x≤11.
It can be -10 line decoder of 4 line to decode subelement 1023, decode the input terminal A of subelement 10230~A3It can be on demand
Seek the output terminal Q with count sub-element 10223~Q6Connection decodes the output terminal Y of subelement 10233、Y4、Y5、Y7、Y8It can be on demand
It asks and is connected with selection subelement 1024, decoding subelement 1023 is used to export the signal of its input terminal into row decoding.
Wherein, the input terminal for decoding subelement 1023 (is denoted as A0~A3) with output terminal (be denoted as Y0~Y9) can have it is as follows
Relation shown in table.
Subelement 1023 is decoded by the signal to its input terminal into row decoding, Y3End is in A0And A1End is simultaneously high level
When, Y3End output high level (as shown in Figure 9), and continue 8 count values (i.e. 8 clock cycle), to make Y3The high level one at end
Straight to keep, after the 32nd clock cycle, control module 30 then no longer generates normal clock signal, i.e., into invalid data week
Phase.It can be toggle switch to select subelement 1024, and output terminal keeps subelement 1025 to be connected with data, can will be with Y3End pair
The switching gate answered makes the Y of decoding subelement 10233The decoded signal at end exports to data and keeps subelement 1025.
It can be d type flip flop that data, which keep subelement 1025, for by Y3Hold a upper clock for the decoded signal of output
The signal in cycle remains to present clock period, exports the first initial signal.
As shown in figure 9, when into the next signal cycle, resetting the output of subelement 1026 reset signal makes count sub-element
1022 reset, at this point, Q3End/Q4End/Y3The signal at end becomes low level, but since data keep subelement 1025 that can incite somebody to action
The signal of a upper clock cycle for decoded signal remains to present clock period, therefore, the first of the next signal cycle
A clock cycle, data keep subelement 1025 still to export high level.It is so repeatedly above-mentioned after the progress next signal cycle
Process.
Based on this, control module 30 generates the second initial signal (as shown in Figure 10) according to the feature of the first initial signal.
First initial signal and clock signal are sent to the first shift LD module 103, by the first shift LD module 103 in institute
Under the driving for stating clock signal, according to first initial signal 24 101 timesharing of luminescence unit is controlled to carry out optical signal launch.
Second initial signal and clock signal are sent to the second shift LD module 202, by the second shift LD module 202 in institute
Under the driving for stating clock signal, signal output is carried out according to 101 corresponding light receiving unit 201 of luminescence unit.
The above is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, in the technical scope that any one skilled in the art discloses in the utility model, variation can be readily occurred in
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain of profit requirement.
Claims (7)
1. a kind of photoelectric detection system, including light emitting module, by optical module and control module；The light emitting module includes sending out
Penetrate the luminescence unit of optical signal, it is described by optical module include corresponding with the luminescence unit and for receive optical signal by
Light unit；It is characterized in that,
The light emitting module further includes logic control element；The logic control element is used for what is sent according to the control module
Clock signal is modulated the clock signal to obtain the first initial signal；
The control module is used to generate the clock signal in the data cycle of each signal period, and shines simultaneously to described
Module and described sent the clock signal by optical module；It is generated and the first according to the feature of first initial signal
Second initial signal of beginning signal synchronization is sent to described by optical module.
2. photoelectric detection system according to claim 1, which is characterized in that the light emitting module further includes the first displacement and posts
Storing module, it is described to be further included the second shift LD module by optical module；
The first shift LD module, under the driving of the clock signal, being controlled according to first initial signal
The luminescence unit timesharing carries out optical signal launch；
The second shift LD module, under the driving of the clock signal, being controlled according to second initial signal
The light receiving unit carries out signal output, and the light receiving unit is corresponding with the luminescence unit for emitting optical signal.
3. photoelectric detection system according to claim 1 or 2, which is characterized in that the logic control element includes counting
Subelement, decoding subelement, selection subelement, data keep subelement and reset subelement；
The count sub-element is used to count the rising edge or trailing edge of the clock signal；
The input terminal of the decoding subelement is connected with the output terminal of the count sub-element, and the decoding subelement is used for it
The signal of input terminal is exported into row decoding；
The input terminal of the selection subelement is connected with the output terminal of the decoding subelement, the output terminal of the selection subelement
With the data subelement is kept to be connected, the selection subelement is used for the output terminal output for making the decoding subelement
Decoded signal inputs to the data and keeps subelement；Wherein, the decoding letter of the output terminal output of the decoding subelement
Number after reaching corresponding count value and carrying out signal overturning, it is always maintained at until the count sub-element is reset；The counting
Value is equal to the number of all luminescence units in the light emitting module；
The data keep subelement to be used to the signal of a upper clock cycle for the decoded signal remaining to present clock
Cycle exports first initial signal；
When the reset subelement is by based on a signal period completely, the count sub-element is resetted.
4. photoelectric detection system according to claim 3, which is characterized in that the logic control element further includes shaping list
Member, input terminal are connected with the control module, and output terminal is connected with the count sub-element and the reset subelement；
The shaping unit is used to carry out noise reduction process to the clock signal.
5. photoelectric detection system according to claim 3, which is characterized in that the control module is according to the described first starting
The feature of signal generates second initial signal synchronous with first initial signal, including：
The control module is based on first signal period useless principle that need to give up, according to first initial signal from second
A signal period generates the spy of the pulse signal of a clock widths in first clock cycle of each signal period
Sign generates second initial signal synchronous with first initial signal.
6. photoelectric detection system according to claim 3, which is characterized in that the control module is additionally operable to each described
The invalid data cycle of signal period, stop to the light emitting module and it is described sent the clock signal by optical module, until
Until one signal period meter is full；
The decoded signal of the output terminal output of the decoding subelement after reaching corresponding count value and carrying out signal overturning,
It is always maintained at being reset up to the count sub-element, including：
The decoded signal of the output terminal output of the decoding subelement is reaching corresponding count value progress signal overturning simultaneously
After continuing certain clock cycle, into the invalid data cycle, the current potential of the decoded signal is made to continue maintained until institute
Count sub-element is stated to be reset.
7. photoelectric detection system according to claim 4, which is characterized in that the shaping unit is Schmidt trigger；
The decoding subelement is address decoder；
It is described to select subelement as toggle switch；
It is d type flip flop that the data, which keep subelement and the reset subelement,.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721601844.7U CN207440315U (en) | 2017-11-24 | 2017-11-24 | A kind of photoelectric detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839672A (en) * | 2017-11-24 | 2019-06-04 | 合肥欣奕华智能机器有限公司 | A kind of photoelectric detection system and signal synchronizing method |
| CN115385211A (en) * | 2022-07-21 | 2022-11-25 | 展鹏科技股份有限公司 | Elevator light curtain signal receiving device and elevator light curtain system |
| CN115385212A (en) * | 2022-07-21 | 2022-11-25 | 展鹏科技股份有限公司 | Elevator light curtain signal emission device and elevator light curtain system |
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2017
- 2017-11-24 CN CN201721601844.7U patent/CN207440315U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839672A (en) * | 2017-11-24 | 2019-06-04 | 合肥欣奕华智能机器有限公司 | A kind of photoelectric detection system and signal synchronizing method |
| CN115385211A (en) * | 2022-07-21 | 2022-11-25 | 展鹏科技股份有限公司 | Elevator light curtain signal receiving device and elevator light curtain system |
| CN115385212A (en) * | 2022-07-21 | 2022-11-25 | 展鹏科技股份有限公司 | Elevator light curtain signal emission device and elevator light curtain system |
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