CN109298461A - A kind of method that correlation type optoelectronic switch determines light projector state - Google Patents
A kind of method that correlation type optoelectronic switch determines light projector state Download PDFInfo
- Publication number
- CN109298461A CN109298461A CN201811033641.1A CN201811033641A CN109298461A CN 109298461 A CN109298461 A CN 109298461A CN 201811033641 A CN201811033641 A CN 201811033641A CN 109298461 A CN109298461 A CN 109298461A
- Authority
- CN
- China
- Prior art keywords
- light
- light projector
- period
- optoelectronic switch
- receiving device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
- H03K17/943—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector using a plurality of optical emitters or detectors, e.g. keyboard
Abstract
The purpose of the application is to provide a kind of method of correlation type optoelectronic switch judgement light projector state, by determining according to the light projector period of the first optoelectronic switch in correlation type optoelectronic switch and/or the light projector period of the second optoelectronic switch and determining the period；First optical signal that the light-receiving device is received carries out the capture task in the judgement period as trigger signal, according to the trigger signal, with the quantity of the effective optical signal that captures of the determination capture task within the judgement period；Compare the quantity and preset threshold value of effective optical signal, according to the result of the comparison the light projector state of the determining light projector with the light-receiving device with group, wherein the light projector state includes into light state and shading status.With the malfunction after preventing two groups of light from interfering.Without additional optics component, it is thus only necessary to by simply setting so that light projector and light-receiving device correspond.
Description
Technical field
This application involves a kind of methods that optoelectronic switch field more particularly to correlation type optoelectronic switch determine light projector state.
Background technique
Correlation type optoelectronic switch is two parts of light projector and light-receiving device, and light-receiving device is detected according to the light pulse received
Object whether there is or not.Different from the optoelectronic switch of reflection-type, light-receiving device can not precise synchronization light projector pulse, so pacifying side by side with it
The light of light projector likewise enters light-receiving device in another set correlation type optoelectronic switch, causes to malfunction, and is referred to as to have occurred
Interference.By the method for optical polarization, polarizing film is installed before light projector, light wave is become into shear wave and longitudinal wave, light-receiving device is in
Same installation polarizing film, receives various shear wave and longitudinal wave, and this by polarizing film to reach two groups of correlation type optoelectronic switches arranged side by side
It is close to the product of installation, referred to as passive type interferes prevention method, and the cost of the product can also increased.
For having the correlation type optoelectronic switch for preventing outer random light function, now widely used is a kind of band gate-control signal
Reception mode, the interference of outer random light can be prevented, timing diagram as shown in Figure 1, by optical gate (gate) and light projector period setting
Identical, when the continuous number fallen in light gate by optical signal reaches setting value, light-receiving device judgement is itself light projector
Light.When there is pulse discontinuous, it is identified outer random light.This mode can shield the light for being greater than the T2 period, still
For being less than the light in T2 period, as entered two by optical signal in a light gate, signal processing circuit, which still believes that, is
The light of itself and by continuous counter, influence sensor and correctly judge.Therefore this mode, which does not have equally to interfere, prevents function
Energy.
Therefore, it is necessary to a kind of determination methods that middle optical signal is interfered about correlation type optoelectronic switch, to identify same group
The signal of light projector, the malfunction after preventing two groups of light from interfering.
Summary of the invention
The purpose of the application is to provide a kind of method of correlation type optoelectronic switch judgement light projector state, to solve correlation type light
It can not be detected when electric switch interferes, and to avoid interference with the problem of increasing wiring and installation cost.
In order to solve the above technical problems, providing a kind of correlation type optoelectronic switch judgement throwing according to the one side of the application
The method of light state, this method comprises:
According to the light projector of the light projector period of the first optoelectronic switch in correlation type optoelectronic switch and/or the second optoelectronic switch week
Phase, which determines, determines the period, wherein first optoelectronic switch and second optoelectronic switch include light projector and light-receiving device, and
The frequency for the light that corresponding light projector is launched is different；
First optical signal that the light-receiving device is received is as trigger signal, according to trigger signal progress
The capture task in the period is determined, with the effective optical signal that captures of the determination capture task within the judgement period
Quantity；
Compare the quantity and preset threshold value of effective optical signal, determination is same with the light-receiving device according to the result of the comparison
The light projector state of the light projector of group, wherein the light projector state includes into light state and shading status.
Further, sentenced according to the light projector period of the first optoelectronic switch and/or the determination of the light projector period of the second optoelectronic switch
Fixed cycle, including following at least any one:
Using the least common multiple in the light projector period of the first optoelectronic switch and the light projector period of the second optoelectronic switch as judgement
Period；
By N times of the light projector period of the first optoelectronic switch as the judgement period, wherein the N=1,2,3 ... ...；
By N times of the light projector period of the second optoelectronic switch as the judgement period, wherein the N=1,2,3 ... ....
Further, it is determined that the quantity of the effective optical signal that captures of the capture task within the judgement period,
Include:
The corresponding signal capture gate-width degree of the light-receiving device is opened after the signal capture period of light-receiving device；
Judge whether to be received within the time of the signal capture gate-width degree with the light-receiving device with the light projector organized
Optical signal is counted if so, determining that the optical signal received is effective optical signal.
Further, which comprises
If not receiving optical signal within the time of the signal capture gate-width degree, the fixed effective light in front is abandoned
The quantity of signal, redefines trigger signal.
Further, the quantity Yu preset threshold value of effective optical signal, determining according to the result of the comparison and institute
Light-receiving device is stated with the light projector state of the light projector of group, comprising:
If the quantity of effective optical signal is more than or equal to preset threshold value, with the light-receiving device with the light projector organized
Light projector state is into light state；
If the quantity of effective optical signal is less than preset threshold value, with the light-receiving device with the light projector of the light projector of group
State is shading status.
Further, which comprises
The cycle synchronisation of the light projector pulse in the signal capture period and corresponding optoelectronic switch of the light-receiving device, wherein institute
The period for stating light projector pulse carries out light projector according to predetermined period for the light projector.
Further, the quantity Yu preset threshold value of effective optical signal, determining according to the result of the comparison and institute
After the light projector state for stating the light projector of the same group of light-receiving device, comprising:
Related data in the judgement period is purged, wherein the related data includes the light projector
The quantity of light projector state and effective optical signal.
Further, the method also includes:
It is the light projector period of first optoelectronic switch and the light projector period of the second optoelectronic switch when the judgement period
When least common multiple, if not receiving the light projector with the light-receiving device with group after 2 times of times of the duration for determining the period
The optical signal of device then abandons the corresponding timing of current capture task, will receive timing and deviates according to preset time.
Compared with prior art, the application passes through the light projector period according to the first optoelectronic switch in correlation type optoelectronic switch
And/or second optoelectronic switch the light projector period determine determine the period, wherein first optoelectronic switch is opened with second photoelectricity
Guan Jun includes light projector and light-receiving device, and the frequency of light that corresponding light projector is launched is different；The light-receiving device is received
First optical signal carries out the capture task in the judgement period as trigger signal, according to the trigger signal, with determination
The quantity of the effective optical signal that captures of the capture task within the judgement period；Compare the number of effective optical signal
Amount and preset threshold value, determination is with the light-receiving device with the light projector state of the light projector of group according to the result of the comparison, wherein described
Light projector state includes into light state and shading status.The different light of two groups of frequencies is issued using two groups of light projectors, light-receiving device passes through
Certain algorithm, to identify the signal with group light projector, the malfunction after preventing two groups of light from interfering.Without volume
Outer optics component, it is thus only necessary to by simply setting so that light projector and light-receiving device correspond, wherein the method for setting
It can be button operation or conducting wire switching, or completed by carrying out special operation after booting.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows the timing diagram for preventing interference in a manner of the reception with gate-control signal in the prior art；
Fig. 2 shows a kind of correlation type optoelectronic switches that the application provides on one side to determine that the method flow of light projector state shows
It is intended to；
Fig. 3 shows two groups of correlation type optoelectronic switches and its signal node composition in one embodiment of the application；
Fig. 4 shows the flow diagram for carrying out determining light projector state in one embodiment of the application；
Fig. 5, which is shown, captures the time diagram with group signal time in one embodiment of the application.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
The application is described in further detail with reference to the accompanying drawing.
Fig. 2 shows a kind of correlation type optoelectronic switches that the application provides on one side to determine that the method flow of light projector state shows
It is intended to, this method comprises: step S11~step S13, wherein in step s 11, according to first in correlation type optoelectronic switch
The light projector period of optoelectronic switch and/or the light projector period of the second optoelectronic switch determine and determine the period, wherein first photoelectricity is opened
Closing with second optoelectronic switch includes light projector and light-receiving device, and the frequency of light that corresponding light projector is launched is different；?
In step S12, first optical signal that the light-receiving device is received carries out institute according to the trigger signal as trigger signal
The capture task determined in the period is stated, with the effective optical signal that captures of the determination capture task within the judgement period
Quantity；In step s 13, the quantity Yu preset threshold value of effective optical signal, according to the result of the comparison determine with
Light projector state of the light-receiving device with the light projector of group, wherein the light projector state includes into light state and shading status.It utilizes
Two groups of light projectors issue the different light of two groups of frequencies, and light-receiving device is prevented by certain algorithm to identify the signal with group light projector
Malfunction after only two groups of light interfere.Without additional optics component, it is thus only necessary to by simply setting
So that light projector and light-receiving device correspond, wherein the method for setting can be button operation or conducting wire switching, or by opening
Special operation is carried out after machine to complete.
Specifically, in step s 11, according to the light projector period of the first optoelectronic switch in correlation type optoelectronic switch and/or
The light projector period of second optoelectronic switch, which determines, determines the period, wherein first optoelectronic switch and second optoelectronic switch are equal
Including light projector and light-receiving device, and the frequency of light that corresponding light projector is launched is different；Here, as shown in Figure 3 two groups to penetrating
Type optoelectronic switch and its signal node composition, the first optoelectronic switch s1 have the different light projector periods from the second optoelectronic switch s2, week
The setting of phase can be set according to the specific application occasions.Wherein, the first optoelectronic switch s1 includes light projector S1_T and light-receiving device S1_D,
Second optoelectronic switch s2 includes light projector S2_T and light-receiving device S2_D.Wherein, each pa-rameter symbols meaning in Fig. 3 is as follows:
The light projector LED pulse timing of Pulse_1: the first optoelectronic switch,
The light projector LED pulse timing of Pulse_2: the second optoelectronic switch,
The light-receiving device movement of S1_Judge_gate: the first optoelectronic switch determines timing,
The light-receiving device movement of S2_Judge_gate: the second optoelectronic switch determines timing,
The light-receiving device signal capture timing of S1_Catch_gate: the first optoelectronic switch,
The light-receiving device signal capture timing of S2_Catch_gate: the second optoelectronic switch,
The width of the light projector pulse of T1_1&T2_1: the first, second optoelectronic switch,
The period of the light projector pulse of T1_2&T2_2: the first, second optoelectronic switch,
The light-receiving device movement of T1_3&T2_3: the first, second optoelectronic switch determines the period,
The light-receiving device signal capture period of T1_4&T2_4: the first, second optoelectronic switch,
The light-receiving device signal capture gate-width degree of T1_5&T2_5: the first, second optoelectronic switch.
The period is determined by the light projector cycle set of two optoelectronic switches, can be the light projector period of the first optoelectronic switch
Least common multiple with the light projector period of the second optoelectronic switch is as the judgement period；Or, by the light projector week of the first optoelectronic switch
N times of phase is as the judgement period, wherein the N=1,2,3 ... ...；Or, by N times of the light projector period of the second optoelectronic switch
As the judgement period, wherein the N=1,2,3 ... ....
Then, in step s 12, first optical signal light-receiving device received is as trigger signal, according to institute
It states trigger signal and carries out the capture task determined in the period, with the determination capture task catching within the judgement period
The quantity of the effective optical signal received；Here, after two optoelectronic switches are powered, capture period of the light-receiving device by setting, capture
By optical signal, counted to effective optical signal is captured within the judgement period.To in step s 13, more described effective
The quantity of optical signal and preset threshold value, determination is with the light-receiving device with the light projector shape of the light projector of group according to the result of the comparison
State, wherein the light projector state includes into light state and shading status.And then according to the light projector state of determining light projector to throwing
Light device and light-receiving device are set, with the malfunction after preventing two groups of light from interfering.
In one embodiment of the application, in step s 12, the light is opened after the signal capture period of light-receiving device
The corresponding signal capture gate-width degree of device；Judge whether receive within the time of the signal capture gate-width degree and the light-receiving device
With the optical signal of the light projector of group, if so, determining that the optical signal received is effective optical signal, counted.Further,
The described method includes: it is fixed to abandon front if not receiving optical signal within the time of the signal capture gate-width degree
The quantity of effective optical signal, redefines trigger signal.
Further, in step s 13, if the quantity of effective optical signal is more than or equal to preset threshold value, with institute
The light projector state that light-receiving device is stated with the light projector of group is into light state；If the quantity of effective optical signal is less than preset threshold
Value is then shading status with the light projector state of the light projector of group with the light-receiving device.
Here, judgement of the optoelectronic switch to optical signal, by the capture period and determines that period two parts function forms, photoelectricity
After switch is powered, two groups of light projectors being mounted in parallel carry out light projector according to the light projector period respectively set.Light-receiving device is captured
Oneself judges the whether effective task of signal after by the task and capture of optical signal.
A the execution of task) is captured
Capture task is while to eliminate accumulated error to find the light with group in light in two groups of unordered entering.In conjunction with Fig. 3
In timing diagram be described in detail:
After optoelectronic switch is powered, the phase for two groups of light that light projector generates is unordered, so when light-receiving device never enters light
When state is entered into light state, it is also referred to as synchronization signal using receive first optical signal as trigger signal, this is believed
Number be used as a reference signal, carry out it is next with group signal capture period.The processing method of sensor signal is with the first light
Electric switch s1 is illustrated as an example.
Step 1: after light-receiving device s1 receives an optical signal, which starts following step as a trigger signal
Rapid two；
Step 2: passing through the T1_4 time, then opens T1_5 gate signal, receives the signal of s1 light projector, because by setting
Fixed, the period with group throwing, light-receiving device is identical, so, if as soon as an optical signal is received in the T1_5 time, then light-receiving device
Default previous signal to issue with group light projector.Useful signal counter adds up to be 2 at this time.If T1_5 does not have in the time
Signal is received, then illustrating that first previous trigger signal is the optical signal of another set different cycles, then abandoning the number of front
According to the triggering of one waiting signal of return step.
Step 3: step 2, if still receiving useful signal, the effective counter+1 of signal are repeated；
Duplicate number is set according to the detection response time of optoelectronic switch.
B the execution of judgement task) is exported
After light-receiving device s1 receives an optical signal, which opens a judgement period as a trigger signal.
If useful signal counting reaches setting value in a cycle, then it is assumed that light-receiving device steadily has received with group light projector sending
Useful signal, then import and export light state.Determine that the length in period depends on the cycle set of two groups of light projector pulses, more reasonably sets
It is set to the least common multiple one number time of two groups of photoperiods.Similarly, when in a cycle useful signal counter do not reach setting value,
Then export shading status.
In one embodiment of the application, which comprises the signal capture period of the light-receiving device and corresponding photoelectricity
The cycle synchronisation of the light projector pulse of switch, wherein the period of the light projector pulse for the light projector according to predetermined period into
Row light projector.Here, T1_2 is synchronous with T1_4, T2_2 is synchronous with T2_4, and two groups of light projectors issue the different light of two groups of frequencies.
In conjunction with the timing diagram in Fig. 3, each parameter in timing diagram is set, as shown in Table 1:
Table one
It should be noted that the setting of each parameter in table one is only the citing in one embodiment of the application, other are existing
Or other settings of parameter for being likely to occur from now on be such as applicable to the application, should also be included in the application protection scope with
It is interior, and be incorporated herein by reference.
In one specific embodiment of the application, with the setting data of each parameter in table one, for the first optoelectronic switch s1, such as
Shown in Fig. 4.Wherein, step1~step2 is the datum mark in a judgement period, further, by the phase in the judgement period
It closes data to be purged, wherein the related data includes the light projector state of the light projector and the number of effective optical signal
Amount, to eliminate cumulative errors, that is, needs to need to remove all data after each judgement period is complete, implementation can be in the base
A timing cycle is opened on schedule, and signal is entered by interrupt mode；Also it can star a timer, the period of timing is with two
The least common multiple numerical value setting in group light projector period.Step3~step5: in order to synchronize with group signal, if receiving letter in the meantime
Number, then show that front is caused interruption or opened and determines that the signal in period is with group signal.If not state is then removed with group signal,
And restart to determine the period.The time setting of Capture window considers that the time setting of Capture window considers pulse precision, response
Time and anti-interference ability.Window time is longer, and capture time is shorter, but anti-interference ability is weaker.
Further, the method also includes: when it is described judgement the period be first optoelectronic switch the light projector period with
When the least common multiple in the light projector period of the second optoelectronic switch, if not received after 2 times of times of the duration for determining the period
To the optical signal with the light-receiving device with the light projector of group, then the corresponding timing of current capture task is abandoned, timing will be received and pressed
It is deviated according to preset time.It is cycle period such as the loop1 in Fig. 4, in actually determining, there are shapes that is optimal and most disliking
State.Optimal is not use loop1 then in two groups of signal initial phase ± 10us, is directly found with group signal.Most disliking state is
After signal is triggered, capture point with group signal just past.The time of so loop1 circulation is N times of least common multiple one number time,
In order to avoid such case generation, it is also necessary to other algorithms: useful signal is not received also after 2 times of common multiple one number time,
It then abandons currently capturing timing, the reception timing off-set regular hour will restart synchronization.In addition, increasing Capture window is also to subtract
The effective way of few pull-in time.
With continued reference to Fig. 4, Step6~step7: after receiving useful signal, shutdown signal receiving channel, to there is signal progress
It counts.Determine that the period resets, guarantees the judgement time for having a judgement period.Then, Step8: determining that the period is not over, micro-
Each gate is adjusted, into loop2, is continued to group signal.Centre is not received by with group signal, then is returned just by loop1
Beginning state.Wherein, ring2 is time fine tuning, and its purpose is to reduce because program branch difference causes program runtime
Difference.Finally, after determining end cycle, whether being reached according to the entire count value for determining useful signal in the period in Step9
To the value of setting, to determine that output is into light state or shading status.
In one embodiment of the application, the citing with group signal time is captured, it is assumed that the time cycle of two group pulses is distinguished
For 75us and 125us, after s2 light-receiving device captures s1 interference signal, in different phasesUnder the conditions of difference, light-receiving device capture
To the delay situation of oneself signal, whenWhen, the time captured for the first time is about 275us；When
When, the time captured for the first time is about 450us,；WhenWhen, the time captured for the first time is about 600us；WhenWhen, the time captured for the first time is about 750us；WhenWhen, the time captured for the first time is about
900us.It is shown and is worked as with Fig. 5When timing diagram, class in the timing diagram and Fig. 5 where phase difference when other ranges
Seemingly.Wherein, phase differenceOptical signal and time difference of the s2 light-receiving device by s1 interference signal for s1 light-receiving device.
By method described herein, carry out the light projector signal of identification light projector, with carry out two groups of light-receiving devices of setting with
The corresponding relationship of light projector prevents from interfering, and can achieve two groups of correlation type optoelectronic switches and interferes the function of preventing, more
The deficiency for mending existing correlation type optoelectronic switch reaches the requirement that two groups of correlation type optoelectronic switches can be close to installation.Also it can reach it
Cause is that interference occurs and undetectable field.Meanwhile the occasion originally interfered, have to the light using correlation type
In the case where electric switch, installation is intersected to avoid interference with by light projector and light-receiving device, but increase the cost of wiring and installation,
By method described herein, the setting of light projector and light-receiving device is only carried out, reduces installation cost.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (8)
1. a kind of method that correlation type optoelectronic switch determines light projector state, which is characterized in that the described method includes:
The light projector period according to the light projector period of the first optoelectronic switch in correlation type optoelectronic switch and/or the second optoelectronic switch is true
Surely determine the period, wherein first optoelectronic switch includes light projector and light-receiving device with second optoelectronic switch, and corresponding
The frequency of light launched of light projector it is different；
First optical signal that the light-receiving device is received carries out the judgement as trigger signal, according to the trigger signal
Capture task in period, with the number of the effective optical signal that captures of the determination capture task within the judgement period
Amount；
Compare the quantity and preset threshold value of effective optical signal, the determining and light-receiving device is the same as group according to the result of the comparison
The light projector state of light projector, wherein the light projector state includes into light state and shading status.
2. the method according to claim 1, wherein according to the light projector period of the first optoelectronic switch and/or second
The light projector period of optoelectronic switch, which determines, determines the period, including following at least any one:
Using the least common multiple in the light projector period of the first optoelectronic switch and the light projector period of the second optoelectronic switch as the judgement period；
By N times of the light projector period of the first optoelectronic switch as the judgement period, wherein the N=1,2,3 ... ...；
By N times of the light projector period of the second optoelectronic switch as the judgement period, wherein the N=1,2,3 ... ....
3. the method according to claim 1, wherein determining the capture task catching within the judgement period
The quantity of the effective optical signal received, comprising:
The corresponding signal capture gate-width degree of the light-receiving device is opened after the signal capture period of light-receiving device；
Judge whether to receive within the time of the signal capture gate-width degree and believe with the light-receiving device with the light of the light projector of group
Number, if so, determining that the optical signal received is effective optical signal, counted.
4. according to the method described in claim 3, it is characterized in that, which comprises
If not receiving optical signal within the time of the signal capture gate-width degree, the fixed effective optical signal in front is abandoned
Quantity, redefine trigger signal.
5. the method according to claim 1, wherein the quantity of effective optical signal and preset threshold
Value, determination is with the light-receiving device with the light projector state of the light projector of group according to the result of the comparison, comprising:
If the quantity of effective optical signal is more than or equal to preset threshold value, with the light-receiving device with the light projector of the light projector of group
State is into light state；
If the quantity of effective optical signal is less than preset threshold value, with the light-receiving device with the light projector state of the light projector of group
For shading status.
6. according to the method described in claim 3, it is characterized in that, which comprises
The cycle synchronisation of the light projector pulse in the signal capture period and corresponding optoelectronic switch of the light-receiving device, wherein the throwing
The period of light pulse carries out light projector according to predetermined period for the light projector.
7. the method according to claim 1, wherein the quantity of effective optical signal and preset threshold
Value, according to the result of the comparison after the light projector state of the determining light projector with the light-receiving device with group, comprising:
Related data in the judgement period is purged, wherein the related data includes the light projector of the light projector
The quantity of state and effective optical signal.
8. according to the method described in claim 2, it is characterized in that, the method also includes:
When the minimum that the judgement period is the light projector period of first optoelectronic switch and the light projector period of the second optoelectronic switch
When common multiple, if not received after 2 times of times of the duration for determining the period with the light-receiving device with the light projector organized
Optical signal then abandons the corresponding timing of current capture task, will receive timing and deviates according to preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033641.1A CN109298461B (en) | 2018-09-05 | 2018-09-05 | Method for judging light projection state of correlation type photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033641.1A CN109298461B (en) | 2018-09-05 | 2018-09-05 | Method for judging light projection state of correlation type photoelectric switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109298461A true CN109298461A (en) | 2019-02-01 |
| CN109298461B CN109298461B (en) | 2020-05-19 |
Family
ID=65166139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811033641.1A Active CN109298461B (en) | 2018-09-05 | 2018-09-05 | Method for judging light projection state of correlation type photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109298461B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200534A (en) * | 2021-12-09 | 2022-03-18 | 欧姆龙(上海)有限公司 | Photoelectric sensor and control method thereof |
| CN114200534B (en) * | 2021-12-09 | 2024-04-26 | 欧姆龙(上海)有限公司 | Photoelectric sensor and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01132987A (en) * | 1987-11-18 | 1989-05-25 | Nippon Air Brake Co Ltd | Multiple-ray type face sensor switch |
| US5416316A (en) * | 1992-12-14 | 1995-05-16 | Erwin Sick Gmbh Optik-Electronik | Optical sensor arrangement for presence detection with variable pulse repetition frequency |
| JP2002323574A (en) * | 2001-01-11 | 2002-11-08 | Omron Corp | Multiple optical axial photoelectric sensor |
| CN1756078A (en) * | 2004-09-30 | 2006-04-05 | 欧姆龙株式会社 | Multiple-optical-axis photoelectric sensor |
| CN103066980A (en) * | 2011-10-21 | 2013-04-24 | 阿自倍尔株式会社 | Photoelectric switch |
| CN105035926A (en) * | 2014-05-02 | 2015-11-11 | 恩索塔有限公司 | Method of testing an optical sensor |
-
2018
- 2018-09-05 CN CN201811033641.1A patent/CN109298461B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01132987A (en) * | 1987-11-18 | 1989-05-25 | Nippon Air Brake Co Ltd | Multiple-ray type face sensor switch |
| US5416316A (en) * | 1992-12-14 | 1995-05-16 | Erwin Sick Gmbh Optik-Electronik | Optical sensor arrangement for presence detection with variable pulse repetition frequency |
| JP2002323574A (en) * | 2001-01-11 | 2002-11-08 | Omron Corp | Multiple optical axial photoelectric sensor |
| CN1756078A (en) * | 2004-09-30 | 2006-04-05 | 欧姆龙株式会社 | Multiple-optical-axis photoelectric sensor |
| CN103066980A (en) * | 2011-10-21 | 2013-04-24 | 阿自倍尔株式会社 | Photoelectric switch |
| CN105035926A (en) * | 2014-05-02 | 2015-11-11 | 恩索塔有限公司 | Method of testing an optical sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200534A (en) * | 2021-12-09 | 2022-03-18 | 欧姆龙(上海)有限公司 | Photoelectric sensor and control method thereof |
| CN114200534B (en) * | 2021-12-09 | 2024-04-26 | 欧姆龙(上海)有限公司 | Photoelectric sensor and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109298461B (en) | 2020-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9971421B2 (en) | System and method for improved synchronization between devices | |
| US3529445A (en) | Apparatus for controlling the operation of circular knitting machines | |
| CN109298461A (en) | A kind of method that correlation type optoelectronic switch determines light projector state | |
| US8943303B2 (en) | Monitoring circuit with a window watchdog | |
| US6148055A (en) | Counter and a revolution stop detection apparatus using the counter | |
| JP3945813B1 (en) | Photoelectric sensor | |
| CN108076220B (en) | Anti-jamming method, electronic device, and computer-readable storage medium | |
| JP3478646B2 (en) | Photoelectric switch and photoelectric switch system | |
| US20110018622A1 (en) | Simple noise control method | |
| JPH04271613A (en) | Photoelectric switch | |
| RU2212097C1 (en) | Square-pulse generator | |
| JP3698319B2 (en) | Multi-axis photoelectric sensor | |
| JPS61198090A (en) | Photoelectric switch | |
| RU2001102296A (en) | Method for detecting smoke and device for its implementation | |
| JPH01183930A (en) | Radio signal interruption detecting device | |
| SU661832A1 (en) | Start-stop timer of driven station sessions | |
| JPS61198093A (en) | Photoelectric switch | |
| JP3899422B2 (en) | Photoelectric sensor | |
| JP3021827B2 (en) | Weft feeler device for loom | |
| KR101016346B1 (en) | Noise canceller | |
| JP2591850B2 (en) | Frame synchronization circuit | |
| SU1064444A1 (en) | Device for checking pulse sequences | |
| SU1524194A1 (en) | Device for locating the centre of interference band signal | |
| RU2019046C1 (en) | Device for cycle synchronization | |
| SU1615618A1 (en) | Device for measuring speed of movement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201399 No. 1053, Huicheng Road, Huinan Town, Pudong New Area, Shanghai Patentee after: Shanghai sodilon Automation Co.,Ltd. Address before: No. 1053 Huicheng Road, Huinan Town, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI SODRON AUTOMATION CO.,LTD. |