CN1394715A - Multichannel infrared photoelectric safety detection method and its equipment - Google Patents
Multichannel infrared photoelectric safety detection method and its equipment Download PDFInfo
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- CN1394715A CN1394715A CN 02134465 CN02134465A CN1394715A CN 1394715 A CN1394715 A CN 1394715A CN 02134465 CN02134465 CN 02134465 CN 02134465 A CN02134465 A CN 02134465A CN 1394715 A CN1394715 A CN 1394715A
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Abstract
Several infrared photoelectric transmitters and several infrared photoelectric receivers are one-to-one correspondently formed into mulltiple detection optical pathes, according to the light blocking condition of every optical path the safety detection can be implemented. Said invention is characterized by that all the optical pathes are alternatively worked in synchronous time-sharing scanning mode, in every slot only one optical path is used for transmitting and receiving infrared light synchronously, so that it has no need of detecting every transmitting and receiving branch state, all the optical pathes are not interfered mutually, and the high-density optical path network can be arranged, and the optical path has no need of regulation and correction.
Description
Technical field:
The present invention relates to multichannel infrared photoelectric safety detection method and device.
Background technique:
In paper cutter, punch press kind equipment,, often need to install photoelectric detection system for the operator is protected.Equally, need also may need this type of device in the occasion of " restriction enters " at other.The principle of traditional photoelectricity safety detection circuit is: each is launched, receiving branch is relatively independent, whether the state that need judge each emission, receiving branch simultaneously overturns with decision-making circuit, this just makes the circuit structure complexity, the multichannel infrared light is worked simultaneously, phase mutual interference and influenced by extraneous factor, cause that reliability is not high, the light path calibration difficulties, the distance between every group of branch road can not be leaned on too closely, and seriously having limited needs the spacing of adjacent light paths tens millimeters utilizations with interior occasion.
Summary of the invention:
Purpose of the present invention is exactly in order to overcome the above problems, and multichannel infrared photoelectric safety detection method and device are provided, and reduces and disturbs, and is easy to realize.
For achieving the above object, the present invention proposes a kind of multichannel infrared photoelectric safety detection method, forms many detection light paths by a plurality of infrared electro transmitters and a plurality of infrared electro receiver are corresponding one by one, light blocking-up situation according to every light path realizes safety detection, it is characterized in that: the mode with synchronous and time-sharing scanning between each bar light path takes turns to operate, that is: in first period, have only first light path to have infrared light to transmit and receive; And, have only second light path to have infrared light to transmit and receive in second period; By that analogy, the mode with light path scanning one by one makes all light path one after the other work; When wherein arbitrary light path is worked, transmit and receive synchronously and carry out.
For achieving the above object, the present invention also proposes a kind of multichannel infrared photoelectric safety detection device, comprises infrared electro transmitter, infrared electro receiver, actuator, and many of the corresponding one by one formations of each photoemitter and photelectric receiver detect light paths; It is characterized in that: also comprise synchronous and time-sharing scanning device, pulse distribution device, pulse collection device, described synchronous and time-sharing scanning device is used to produce the progressive scanning signal, pulse distribution device that control links to each other with photoemitter and the pulse collection device that links to each other with photelectric receiver make emission, receive synchronously; Described pulse distribution device is modulated to carrier signal with modulation signal and the signal pulse order is distributed to each road infrared transmitter under the control of synchronous and time-sharing scanning device, the pulse collection device is used under the control of synchronous and time-sharing scanning device, each infrared electro receiver of progressive scanning obtains the pulse signal identical with transmitting terminal.
Owing to adopted above scheme, each period has only one tunnel light path work, do not need to detect simultaneously the state of each emission, receiving branch, therefore, do not disturb substantially between the light path, but high-density arrangement light path net, light path is used adjustment hardly, compare with device with traditional infrared electro detecting method, have that circuit is simple, components and parts are few, cost is low, reliability is high, a responding speed, convenience, advantage such as applicable situation is more extensive.
Description of drawings:
Fig. 1 is a schematic block diagram of the present invention.
Embodiment:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
See Fig. 1, multichannel infrared photoelectric safety detection device of the present invention comprises pulse generating means 1, frequency divider 2, synchronous and time-sharing scanning device 3, pulse distribution device 4, infrared electro transmitter 5, infrared electro receiver 6, pulse collection device 7, pulse omission device 8, actuator 9 and controlling device 10.
Infrared electro transmitter 5 is used for the pulse distribution signal is carried out power amplification, promotes the outwards modulated infrared light of emission of infrared emission device.The infrared light that infrared electro receiver 6 is used for receiving is converted into electrical signal.Infrared electro transmitter 5, infrared electro receiver 6 all have a plurality of, and many of the corresponding one by one formations of each photoemitter and photelectric receiver detect light paths.Described synchronous and time-sharing scanning device 3 is used to produce the progressive scanning signal and (sweep signal is converted to the progressive scanning signal, 4 binary system scan round signals for example), pulse distribution device 4 that control links to each other with photoemitter 5 and the pulse collection device 7 that links to each other with photelectric receiver 6 make emission, receive synchronously; Described pulse distribution device 4 is used for that modulation signal is modulated to carrier signal and the signal pulse order is distributed to each road infrared transmitter 5 under the control of synchronous and time-sharing scanning device 3, pulse collection device 7 is used under the control of synchronous and time-sharing scanning device 3, each infrared electro receiver 6 of progressive scanning obtains the pulse signal identical with transmitting terminal.
Described pulse generating means 1 is used to produce a fixed frequency oscillator signal (for example 37.9KHz), provides the infrared electro ballistic device required carrier wave, reference frequency is provided for simultaneously frequency divider 2; Described frequency divider 2 is used for (for example 6 frequency divisions, 8 frequency divisions) behind the reference frequency frequency division, and the modulation signal (for example 592Hz) and the synchronous and time-sharing that obtain using for the infrared electro ballistic device scan the sweep signal of using (for example 148Hz).
What pulse omission device 8 was used for that umber of pulse that pulse collection device 7 is collected and frequency divider 2 produced sends umber of pulse relatively, and when unequal or pulse-losing number surpasses setting value, makes actuator's 9 output state flips in both umber of pulses.Pulse omission device 8 is drawn as a triangle among the figure, ordinary representation comparator (operational amplifier), but this device is not limited to operational amplifier, and its inside can also include counter, trigger etc.Actuator 9 is used for the output signal of paired pulses omission device 8 and carries out power amplification, and drives protection or warning device action.
Controlling device 10 links to each other with the control end of pulse omission device 8, is used for the pulse number that allows to lose is regulated, to obtain different speed of response.
According to the height that detected occasion requires speed of response, the detection light path quantity that described emission, receiver are formed can reach 2～64 the tunnel.Can do the grating networking more in the less demanding occasion of speed of response.
Utilize said apparatus to realize that the method for safety detection is: at first by impulse hunting 1, frequency division 2 produces modulating pulse and scanning pulse signal, synchronous and time-sharing scanning is carried out in 4 pairs of infrared electro emissions 5 of synchronous and time-sharing scanning 3 and pulse distribution and infrared electro reception 6 then, send the infrared light modulating pulse by infrared electro emission 5, receive 6 received pulse signals by infrared electro, handle through pulse collection 7 again, the pulse number that the pulse number that receives and frequency division 2 is produced by pulse omission 8 relatively, whether detect the output pulse loses, if the pulse-losing number surpasses setting value, output state flip drives actuator 9.Regulator 10 can be set and allow 1 of pulse-losing number or n speed of response of coming control gear.
When not having object between infrared electro emission 5 and infrared electro reception 6, after infrared electro receives 5 scanning pulse signals process pulse collections 7 processing that receive, the pulse signal number that receives is consistent with the pulse signal number that frequency division 2 produces, pulse omission 8 output high level, actuator 9 is in normal working.Enter between infrared electro emission 5 and the infrared electro reception 6 as non-printing opacity object; during disconnected wherein one or several light path of retaining; after infrared electro receives 6 pulse signals process pulse collections 7 processing that receive; the pulse number that pulse signal number that receives and frequency division 2 produce is inconsistent; when the pulse-losing number surpasses setting value, pulse omission 8 output low levels drive actuator 9; make device be in off state, thereby play the effect of security alarm or protection.Actuator can be set to flip-over type (when in a single day detection device is triggered, must manual reset), or from position restoring (after shield left light path, detection device recovered normal state automatically).
The present invention is particularly suitable for applying to the protection to the operator of paper cutter and punch press kind equipment, also is suitable for any occasion of other needs " restriction enters ".
Claims (10)
1, a kind of multichannel infrared photoelectric safety detection method, forms many detection light paths by a plurality of infrared electro transmitters and a plurality of infrared electro receiver are corresponding one by one, light blocking-up situation according to every light path realizes safety detection, it is characterized in that: the mode with synchronous and time-sharing scanning between each bar light path takes turns to operate, that is: in first period, have only first light path to have infrared light to transmit and receive; And, have only second light path to have infrared light to transmit and receive in second period; By that analogy, the mode with light path scanning one by one makes all light path one after the other work; When wherein arbitrary light path is worked, transmit and receive synchronously and carry out.
2, multichannel infrared photoelectric safety detection method as claimed in claim 1, it is characterized in that: in synchronous and time-sharing scanning, number to exomonental number and received pulse compares, whether equate or whether the pulse-losing number surpasses setting value with the two, decide the result of safety detection.
3, multichannel infrared photoelectric safety detection method as claimed in claim 2 is characterized in that: if the pulse-losing number surpasses setting value, then circuit upset drives actuator, sends safety alarm or carries out fence operation.
4, multichannel infrared photoelectric safety detection method as claimed in claim 1 or 2 is characterized in that: the detection light path quantity that described emission, receiver are formed is 2～64 the tunnel.
5, multichannel infrared photoelectric safety detection method as claimed in claim 2 is characterized in that: adjust the speed of response that the number that allows pulse-losing realizes controlling device.
6, a kind of multichannel infrared photoelectric safety detection device comprises infrared electro transmitter (5), infrared electro receiver (6), actuator (9), and many of the corresponding one by one formations of each photoemitter and photelectric receiver detect light paths; It is characterized in that: also comprise synchronous and time-sharing scanning device (3), pulse distribution device (4), pulse collection device (7), described synchronous and time-sharing scanning device (3) is used to produce the progressive scanning signal, control pulse distribution device (4) that links to each other with photoemitter (5) and the pulse collection device (7) that links to each other with photelectric receiver (6) make emission, receive synchronously; Described pulse distribution device (4) is modulated to carrier signal with modulation signal and the signal pulse order is distributed to each road infrared transmitter (5) under the control of synchronous and time-sharing scanning device (3), pulse collection device (7) is used under the control of synchronous and time-sharing scanning device (3), each infrared electro receiver (6) of progressive scanning obtains the pulse signal identical with transmitting terminal.
7, multichannel infrared photoelectric safety detection device as claimed in claim 6, it is characterized in that: also comprise pulse generating means (1) and frequency divider (2), described pulse generating means (1) is used to produce a fixed frequency oscillator signal, provide the infrared electro ballistic device required carrier wave, reference frequency is provided for simultaneously frequency divider (2); Described frequency divider (2) is used for behind the reference frequency frequency division, and the modulation signal and the synchronous and time-sharing that obtain using for the infrared electro ballistic device scan the sweep signal of using.
8, as claim 6 or 7 described multichannel infrared photoelectric safety detection devices, it is characterized in that: also comprise pulse omission device (8) and actuator (9), what be used for that umber of pulse that pulse collection device (7) is collected and frequency divider (2) produced sends umber of pulse relatively, and in both umber of pulses when unequal or pulse-losing number surpasses setting value, to actuator (9) output state flip; Actuator (9) is used for the output signal of paired pulses omission device (8) and carries out power amplification, and drives protection or warning device action.
9, as claim 6 or 7 described multichannel infrared photoelectric safety detection devices, it is characterized in that: also comprise controlling device (10), it links to each other with the control end of pulse omission device (8), is used for the pulse number that allows to lose is regulated, to obtain different speed of response.
10, as claim 6 or 7 described multichannel infrared photoelectric safety detection devices, it is characterized in that: the detection light path quantity that described emission, receiver are formed is 2～64 the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021344655A CN1191915C (en) | 2002-07-24 | 2002-07-24 | Multichannel infrared photoelectric safety detection method and its equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021344655A CN1191915C (en) | 2002-07-24 | 2002-07-24 | Multichannel infrared photoelectric safety detection method and its equipment |
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| Publication Number | Publication Date |
|---|---|
| CN1394715A true CN1394715A (en) | 2003-02-05 |
| CN1191915C CN1191915C (en) | 2005-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021344655A Expired - Fee Related CN1191915C (en) | 2002-07-24 | 2002-07-24 | Multichannel infrared photoelectric safety detection method and its equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439560A (en) * | 2013-10-24 | 2015-03-25 | 高桥金属制品（苏州）有限公司 | Tapping machine weak current induction control device |
| CN104841646A (en) * | 2015-04-29 | 2015-08-19 | 南京文采科技有限责任公司 | Time-division exposure and multi-spectral imaging cleaner and cleaning method |
| CN108434714A (en) * | 2018-04-17 | 2018-08-24 | 中山北京理工大学研究院 | A kind of bowling scan-type infrared light detection device and method |
-
2002
- 2002-07-24 CN CNB021344655A patent/CN1191915C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439560A (en) * | 2013-10-24 | 2015-03-25 | 高桥金属制品（苏州）有限公司 | Tapping machine weak current induction control device |
| CN104841646A (en) * | 2015-04-29 | 2015-08-19 | 南京文采科技有限责任公司 | Time-division exposure and multi-spectral imaging cleaner and cleaning method |
| CN108434714A (en) * | 2018-04-17 | 2018-08-24 | 中山北京理工大学研究院 | A kind of bowling scan-type infrared light detection device and method |
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| Publication number | Publication date |
|---|---|
| CN1191915C (en) | 2005-03-09 |
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Granted publication date: 20050309 Termination date: 20110724 |