CN1191915C - 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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- CN1191915C CN1191915C CNB021344655A CN02134465A CN1191915C CN 1191915 C CN1191915 C CN 1191915C CN B021344655 A CNB021344655 A CN B021344655A CN 02134465 A CN02134465 A CN 02134465A CN 1191915 C CN1191915 C CN 1191915C
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Abstract
The present invention discloses a multi-path infrared photoelectric safety detection method. A plurality of detection light paths are formed by the one-to-one correspondence of a plurality of infrared photoelectric emitters and a plurality of infrared photoelectric receivers. The safety detection is carried out according to the interdiction conditions of the light ray of each light path. The present invention is characterized in that all light paths work by turns in the mode of synchronous time-sharing scan, and only one light path has infrared light emission and reception at each time interval, wherein when any light path works, emission and reception are synchronous; because only one light path works at each time interval, the states of each emission branch oath and each reception branch path do not need to be simultaneously detected. Therefore, the light paths are not mutually interfered basically, light path networks can be arranged in high density, and the light paths almost does not need to be regulated. Compared with traditional infrared photoelectric detection methods and apparatuses, the present invention has the advantages of simple circuits, few components, low cost, high reliability, and accurate and convenient response speed regulation, etc., and is suitable for extensive situations.
Description
Technical field:
The present invention relates to multichannel infrared photoelectric safety detection method and device.
Background technology:
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 checkout gear, comprises infrared electro transmitter, infrared electro receiver, executing agency, 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 means, pulse distribution device, pulse collection device, described synchronous and time-sharing scanning means is used to produce the sequential 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 means, the pulse collection device is used under the control of synchronous and time-sharing scanning means, each infrared electro receiver of sequential 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 detection 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.
The specific 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 checkout gear of the present invention comprises pulse generating means 1, frequency divider 2, synchronous and time-sharing scanning means 3, pulse distribution device 4, infrared electro transmitter 5, infrared electro receiver 6, pulse collection device 7, pulse omission device 8, executing agency 9 and adjusting device 10.
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 executing agency'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.Executing agency 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.
Adjusting 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 response speeds.
According to the height that detected occasion requires response speed, 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 response speed.
Utilize said apparatus to realize that the method for safety detection is: at first by pulse generating means 1, frequency divider 2 produces modulating pulse and scanning pulse signal, 4 pairs of infrared electro emitters 5 of synchronous and time-sharing scanning means 3 and pulse distribution device and infrared electro receiver 6 carry out synchronous and time-sharing scanning then, send the infrared light modulating pulse by infrared electro transmitter 5, by infrared electro receiver 6 received pulse signals, handle through pulse collection device 7 again, the pulse number that the pulse number that receives and frequency divider 2 is produced by pulse omission device 8 relatively, whether detect the output pulse loses, if the pulse-losing number surpasses setting value, output state flip drives executing agency 9.Adjusting device 10 can be set and allow 1 of pulse-losing number or n response speed of coming control device.
When not having object between infrared electro transmitter 5 and infrared electro receiver 6, after infrared electro receives 5 scanning pulse signals process pulse collection devices 7 processing that receive, the pulse signal number that receives is consistent with the pulse signal number that frequency divider 2 produces, pulse omission device 8 output high level, executing agency 9 is in normal operating conditions.Entering infrared electro as non-printing opacity object launches between 5 devices and the infrared electro receiver 6; during disconnected wherein one or several light path of retaining; after infrared electro receives 6 pulse signals process pulse collection devices 7 processing that receive; the pulse number that pulse signal number that receives and frequency divider 2 produce is inconsistent; set value when the pulse-losing number surpasses, pulse omission device 8 output low levels drive executing agency 9; make device be in off-state, thereby play the effect of security alarm or protection.Executing agency can be set to flip-over type (when in a single day checkout gear is triggered, must manual reset), or from restoration type (after shelter left light path, checkout gear recovered normal condition 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 executing agency, 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 response speed that the number that allows pulse-losing realizes adjusting device.
6, a kind of multichannel infrared photoelectric safety checkout gear comprises infrared electro transmitter (5), infrared electro receiver (6), executing agency (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 means (3), pulse distribution device (4), pulse collection device (7), described synchronous and time-sharing scanning means (3) is used to produce the sequential 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 means (3), pulse collection device (7) is used under the control of synchronous and time-sharing scanning means (3), each infrared electro receiver (6) of sequential scanning obtains the pulse signal identical with transmitting terminal.
7, multichannel infrared photoelectric safety checkout gear 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, multichannel infrared photoelectric safety checkout gear as claimed in claim 7, it is characterized in that: also comprise pulse omission device (8), 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 executing agency (9) output state flip; Executing agency (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, multichannel infrared photoelectric safety checkout gear as claimed in claim 8, it is characterized in that: also comprise adjusting 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 response speeds.
10, as claim 6 or 7 described multichannel infrared photoelectric safety checkout gears, 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 |
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| CN1394715A CN1394715A (en) | 2003-02-05 |
| CN1191915C true CN1191915C (en) | 2005-03-09 |
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| 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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| CN104439560B (en) * | 2013-10-24 | 2017-07-18 | 高桥金属制品（苏州）有限公司 | A kind of tapping machine light current induction controller |
| CN104841646B (en) * | 2015-04-29 | 2017-06-30 | 南京文采科技有限责任公司 | The de-burring machine and impurity-removing method of a kind of different-time exposure and multispectral imaging |
| 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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Granted publication date: 20050309 Termination date: 20110724 |