CN104459816A - Device and method for increasing detection distance of reflection type optocoupler - Google Patents
Device and method for increasing detection distance of reflection type optocoupler Download PDFInfo
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- CN104459816A CN104459816A CN201410736627.3A CN201410736627A CN104459816A CN 104459816 A CN104459816 A CN 104459816A CN 201410736627 A CN201410736627 A CN 201410736627A CN 104459816 A CN104459816 A CN 104459816A
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Abstract
The invention relates to a device and method for increasing the detection distance of a reflection type optocoupler. The device comprises a signal generating module used for generating wave signals the frequency of which is f, the reflection type optocoupler used for emitting light driven by the signal generating module with an intensity change frequency of f, receiving light reflected back by a detected object and converting the light into electric signals, a frequency selecting amplification module used for filtering and amplifying the electric signals of the reflection type optocoupler and filtering out signals the frequency of which is f, a detection module used for detecting signals passing through the frequency selecting amplification module, and a comparator module used for comparing the signals passing through the detection module with a set comparative level signal, outputting a corresponding level signal according to the comparison result and judging whether the detected object is detected. Compared with the prior art, the device and method have the advantages that the detection distance of an existing reflection type optocoupler can be effectively increased, and antijamming capability is high.
Description
Technical field
The present invention relates to reflecting light RMD fing mode decoupling field, especially relate to a kind of device and method promoting reflective optocoupler detecting distance.
Background technology
Reflective optocoupler is by infraluminescence pipe and silicon phototriode etc., be contained on support with identical direction, when infrared ray luminotron electrified light emitting, light reflexes on silicon phototriode window by shone thing, use the conducting of silicon phototriode, thus have necessarily large electric current to export, with the presence or absence of inspected object.The method of traditional reflective optocoupler inspected object uses galvanic current power to the transmitting terminal of reflective optocoupler and make transmitting terminal launch the infrared signal of some strength, and the infrared signal being received sufficient intensity by receiving end forms the level that electric signal removes to change peripheral module.Infrared signal due to the interference of the factors such as distance, the material of testee and some other light, causes the shorter or erroneous judgement of the distance of the effective inspected object of reflective optocoupler, limits its design like this in engineering sometimes greatly in the process propagated.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of device and method promoting reflective optocoupler detecting distance is provided, effectively can improve the detecting distance of existing reflective optocoupler, and antijamming capability is strong.
Object of the present invention can be achieved through the following technical solutions:
Promote a device for reflective optocoupler detecting distance, comprising:
Signal generating module is the waveform signal of f for occurrence frequency;
Reflective optocoupler, launching the Strength Changes frequency driven through signal generating module is the light of f, receives the light returned through detecting object back reflection, and is converted into electric signal;
Frequency-selecting amplification module, for carrying out filtering and amplification to the electric signal of reflective optocoupler, filters out the signal that frequency is f;
Detection module, for carrying out detection to the signal after frequency-selecting amplification module;
Comparator module, for being compared by the comparative level signal of the signal after detection module and setting, exporting corresponding level signal according to comparative result, judging whether detecting object to be detected.
Described reflective optocoupler comprises for the transmitting terminal of emission of light and the receiving terminal for receiving reflection ray.
Described frequency-selecting amplification module adopts the mode of order in no particular order when electric signal is carried out to filtering and amplifies.
Promote a method for reflective optocoupler detecting distance, comprise the following steps:
A, frequency are the waveform signal of f drive reflective optocoupler to launch light that Strength Changes frequency is f;
B, reflecting light couple the light receiving and return through detecting object back reflection and are converted into electric signal, carry out filtering and amplification, filter out the signal that frequency is f to described electric signal;
C, to step b obtain signal carry out detection;
D, the signal after detecting and the comparative level signal of setting to be compared, judge whether detecting object to be detected according to comparative result.
In step b, electric signal is carried out to filtering and the amplification of order in no particular order.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention to the electric signal of reflective optocoupler after filtering, amplify, detection and relatively judge whether detecting object exists, under identical reflective optocoupler, can obviously promote coverage object being detected by the present invention.
General reflective optocoupler just drives with direct current launches light, but present invention employs frequency is that the alternating current of f drives (frequency produced by signal generating module is that the waveform signal of f drives generation), the light intensity launched has the light that certain frequency can distinguish other phase co-wavelength, so just can prevent the interference of other identical wavelength light from improving detecting distance simultaneously.
Whether 2, the present invention is the frequency by judging the signal received is the characteristic frequency f that reflective optocoupler transmitting terminal is launched, and can avoid the interference of the light of identical wave band thus, strong interference immunity.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment provides a kind of device promoting reflective optocoupler detecting distance, comprise signal generating module 1, reflective optocoupler 2, frequency-selecting amplification module 3, detection module 4 and comparator module 5, signal generating module 1 is the waveform signal of f for occurrence frequency; It is the light of f that reflective optocoupler 2 launches the Strength Changes frequency driven through signal generating module, receive the light returned through detecting object back reflection, and being converted into electric signal, reflective optocoupler 2 comprises for the transmitting terminal 2-1 of emission of light and the receiving terminal 2-2 for receiving reflection ray; Frequency-selecting amplification module 3, for carrying out filtering and the amplification of order in no particular order to the electric signal of reflective optocoupler, filters out the signal that frequency is f; Detection module 4 is for carrying out detection to the signal after frequency-selecting amplification module; Comparator module 5, for being compared by the comparative level signal of the signal after detection module and setting, exports corresponding level signal according to comparative result, judges whether detecting object to be detected.
Such as: the level after detection is 3v, the fiducial value of comparator module setting be 2v, 3v higher than 2v then comparer can export corresponding level signal (such as 3.3v representative detects, 0v representative does not detect) and represent whether object detected.
The present embodiment also provides a kind of method promoting reflective optocoupler detecting distance, comprises the following steps:
A, frequency are the waveform signal of f drive reflective optocoupler to launch light that Strength Changes frequency is f;
B, reflecting light couple the light receiving and return through detecting object back reflection and are converted into electric signal, described electric signal are carried out to filtering and the amplification of order in no particular order, filter out the signal that frequency is f;
C, to step b obtain signal carry out detection;
D, the signal after detecting and the comparative level signal of setting to be compared, judge whether detecting object to be detected according to comparative result.
Claims (5)
1. promote a device for reflective optocoupler detecting distance, it is characterized in that, comprising:
Signal generating module is the waveform signal of f for occurrence frequency;
Reflective optocoupler, launching the Strength Changes frequency driven through signal generating module is the light of f, receives the light returned through detecting object back reflection, and is converted into electric signal;
Frequency-selecting amplification module, for carrying out filtering and amplification to the electric signal of reflective optocoupler, filters out the signal that frequency is f;
Detection module, for carrying out detection to the signal after frequency-selecting amplification module;
Comparator module, for being compared by the comparative level signal of the signal after detection module and setting, exporting corresponding level signal according to comparative result, judging whether detecting object to be detected.
2. the device of the reflective optocoupler detecting distance of lifting according to claim 1, is characterized in that, described reflective optocoupler comprises for the transmitting terminal of emission of light and the receiving terminal for receiving reflection ray.
3. the device of the reflective optocoupler detecting distance of lifting according to claim 1, is characterized in that, adopts the mode of order in no particular order when described frequency-selecting amplification module carries out filtering to electric signal and amplifies.
4. promote a method for reflective optocoupler detecting distance, it is characterized in that, comprise the following steps:
A, frequency are the waveform signal of f drive reflective optocoupler to launch light that Strength Changes frequency is f;
B, reflecting light couple the light receiving and return through detecting object back reflection and are converted into electric signal, carry out filtering and amplification, filter out the signal that frequency is f to described electric signal;
C, to step b obtain signal carry out detection;
D, the signal after detecting and the comparative level signal of setting to be compared, judge whether detecting object to be detected according to comparative result.
5. the method for the reflective optocoupler detecting distance of lifting according to claim 4, is characterized in that, in step b, electric signal is carried out to filtering and the amplification of order in no particular order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736627.3A CN104459816A (en) | 2014-12-04 | 2014-12-04 | Device and method for increasing detection distance of reflection type optocoupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410736627.3A CN104459816A (en) | 2014-12-04 | 2014-12-04 | Device and method for increasing detection distance of reflection type optocoupler |
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| CN104459816A true CN104459816A (en) | 2015-03-25 |
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| CN201410736627.3A Pending CN104459816A (en) | 2014-12-04 | 2014-12-04 | Device and method for increasing detection distance of reflection type optocoupler |
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Citations (5)
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| CN1632531A (en) * | 2004-12-10 | 2005-06-29 | 华南师范大学 | Underwater hardware detection method and device |
| CN101455567A (en) * | 2007-12-14 | 2009-06-17 | 深圳迈瑞生物医疗电子股份有限公司 | Anti-interference blood oxygen measuring device and blood oxygen probe |
| CN102244511A (en) * | 2010-05-12 | 2011-11-16 | 上海领芯微电子有限公司 | Application-specific integrated circuit for remote infrared photoelectric switch and remote infrared photoelectric switch using same |
| US20130032699A1 (en) * | 2011-08-01 | 2013-02-07 | Leica Microsystems Cms Gmbh | Device and method for counting photons |
| US20140070077A1 (en) * | 2011-05-20 | 2014-03-13 | Murata Manufacturing Co., Ltd. | Optical sensor device |
-
2014
- 2014-12-04 CN CN201410736627.3A patent/CN104459816A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632531A (en) * | 2004-12-10 | 2005-06-29 | 华南师范大学 | Underwater hardware detection method and device |
| CN101455567A (en) * | 2007-12-14 | 2009-06-17 | 深圳迈瑞生物医疗电子股份有限公司 | Anti-interference blood oxygen measuring device and blood oxygen probe |
| CN102244511A (en) * | 2010-05-12 | 2011-11-16 | 上海领芯微电子有限公司 | Application-specific integrated circuit for remote infrared photoelectric switch and remote infrared photoelectric switch using same |
| US20140070077A1 (en) * | 2011-05-20 | 2014-03-13 | Murata Manufacturing Co., Ltd. | Optical sensor device |
| US20130032699A1 (en) * | 2011-08-01 | 2013-02-07 | Leica Microsystems Cms Gmbh | Device and method for counting photons |
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Application publication date: 20150325 |
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