阅读说明：本技术 一种可实现激光对射探测器集群应用不互相干扰的方法 (Method for preventing mutual interference of laser correlation detector cluster application ) 是由 陈盛友 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种可实现激光对射探测器集群应用不互相干扰的方法,包括激光发射机和激光接收机；激光发射机设有激光发射器,激光调制及数据通讯管理微处理器,通讯地址拨码开关,末位通讯地址开关,485通讯处理器和电源电路；激光接收机设有激光接收器,激光信号解调及识别微处理器,报警信号处理及输出控制微处理器和电源电路。本发明通过增加485通讯处理器和通讯地址拨码开关,将多对激光发射机通过485通讯线连接,并对每一个激光发射机设不同地址编码形成集群,不同通讯地址编码的激光发射机,按照通讯地址编码顺序轮流发射信号,在一个集群内,在任何时间点始终只有一个激光发射机在发射信号,不会形成相邻激光发射机光束余晖相互覆盖干扰。(The invention discloses a method for realizing that the cluster application of laser correlation detectors does not interfere with each other, which comprises a laser transmitter and a laser receiver; the laser transmitter is provided with a laser transmitter, a laser modulation and data communication management microprocessor, a communication address dial switch, a last communication address switch, a 485 communication processor and a power circuit; the laser receiver is provided with a laser receiver, a laser signal demodulation and identification microprocessor, an alarm signal processing and output control microprocessor and a power circuit. According to the invention, through adding a 485 communication processor and a communication address dial switch, a plurality of pairs of laser transmitters are connected through 485 communication lines, each laser transmitter is provided with different address codes to form a cluster, the laser transmitters with different communication address codes transmit signals in turn according to the communication address coding sequence, only one laser transmitter transmits the signal all the time in one cluster, and mutual covering interference of light beams and afterglow of adjacent laser transmitters cannot be formed.)

1. A method for realizing that the cluster application of the laser correlation detector does not interfere with each other is characterized in that the laser detector comprises a laser transmitter and a laser receiver matched with the laser transmitter; the laser transmitter is provided with a laser transmitter, a laser modulation and data communication management microprocessor, a communication address dial switch, a last communication address switch, a 485 communication processor and a power circuit; the laser receiver is provided with a laser receiver, a laser signal demodulation and identification microprocessor, an alarm signal processing and output control microprocessor and a power circuit; the method comprises the following specific operation steps: all laser transmitters in the cluster are connected in series through a 485 communication line to form a cluster, a laser modulation and data communication management microprocessor in the laser transmitter at an initial address sends out a communication instruction through a 485 communicator to enable the communication instruction to be communicated with other laser transmitters connected with the 485 communication line, when the laser transmitter at the initial address confirms that the communication with the laser transmitters at other addresses is normal, the laser transmitter at the initial address sends out instructions to all the laser transmitters in the cluster connected with the 485 communication line, the laser transmitters are sequenced according to different address codes and sequentially and circularly transmit modulated and encrypted laser signals in turn, namely, after the laser transmitter at the address 1 sends out a round of modulated and encrypted laser signals, then the laser transmitter at the address 2 sends out a round of modulated and encrypted laser signals, and then the laser transmitter at the address 3 sends out a round of modulated and encrypted laser signals, and sequentially and alternately going backwards until the laser transmitter which is switched on by the last communication address switch transmits a round of modulated encrypted laser signals, one cycle is finished, the previous cycle is repeated, and all the laser transmitters in the cluster connected with the 485 communication line continuously and repeatedly work in a cycle mode.

2. The method of claim 1, wherein in a cluster application, 485 communication lines of all laser transmitters are connected in series, and a communication address dial switch of each laser transmitter is set to a unique address code, wherein one laser transmitter communication address dial switch is set to a start address code defined by a laser modulation and data communication management microprocessor; the last communication address switch of the last laser transmitter is set to the last transmitter state defined by the laser modulation and data communication management microprocessor.

Technical Field

The invention relates to the technical field of laser detectors, in particular to a method capable of realizing that cluster application of laser correlation detectors does not interfere with each other.

Background

The laser correlation detector is an active detector which takes laser as a detection light source and consists of a laser transmitter and a laser receiver in pairs, and is widely applied to various places such as perimeter intrusion detection, subway shield door anti-pinch detection, special place counting detection and the like due to the excellent characteristics of long detection distance, strong environmental interference resistance and the like. The laser correlation detectors in the market at present are simple to install and use, each pair of laser correlation detectors work independently, a laser transmitter and a laser receiver are fixedly installed face to face, the laser transmitter and the laser receiver are respectively connected with a DC12-24V power supply, a normally open/normally closed signal line of the laser receiver is connected with a controller at the rear end, all light beams of the laser transmitter are aligned with the laser receivers of the laser receiver one by adjusting the X-axis/Y-axis angle of the laser transmitter, when each laser receiver of the laser receiver can normally receive laser signals of the light beams corresponding to the laser transmitter, the laser detector enters a normal working state, when someone or other objects block the laser beams between the laser transmitter and the laser receiver, the laser receiver cannot receive the laser signals of the light beams corresponding to the laser transmitter, the laser receiver outputs an alarm signal.

With the increasing popularization of the application of the laser correlation detector, the technical performance of the laser correlation detector in the current market can not meet the application requirements of many places, for example, the problem of mutual interference among the detectors when a plurality of pairs of laser correlation detectors are applied back to back (shown in figure 2) or shoulder to shoulder (shown in figure 3) in a small range is a technical problem restricting the popularization and the application of the laser correlation detector.

Fig. 2 and fig. 3 are two typical application scenarios of the laser correlation detector in practical application, and from the application diagram shown in fig. 2, it can be seen that when a plurality of pairs of laser correlation detectors with the same wavelength are applied back to back, a phenomenon that beams of adjacent laser correlation detectors overlap each other occurs, that is, when a beam emitted by the laser transmitter 1 is projected onto the laser receiver 1, afterglow of the beam also irradiates the laser receiver 2 or the laser receiver 3; besides being normally received by the laser receiver 2, the light beam from the laser transmitter 2 has afterglow which is also received by the laser receiver 3. As can be seen from the application diagram shown in fig. 3, when a plurality of pairs of laser correlation detectors are applied side by side, the phenomenon that the beams of the adjacent laser correlation detectors overlap each other also occurs, that is, when the beam emitted by the laser transmitter 1 is projected onto the laser receiver 1, the afterglow of the beam also irradiates the laser receiver 2 or the laser receiver 3; besides being normally received by the laser receiver 2, the light beam afterglow of the laser transmitter 2 can be received by the laser receiver 1 or the laser receiver 3; besides being normally received by the laser receiver 3, the light beam from the laser transmitter 3 has afterglow which is also received by the laser receiver 2 or the laser receiver 1.

When one laser receiver can receive laser beam signals sent by the laser transmitters corresponding to codes of the laser receiver and can also receive laser beam signals sent by two or more laser transmitters which have the same wavelength and do not correspond to the codes of the laser receiver, namely the laser beam signals which have the same wavelength and different beam codes are received by the laser receiver, the laser signal demodulation and identification microprocessor in the laser receiver can be difficult to accurately identify, so that the laser receiver can generate irregular false alarms, troubles are brought to users, and finally the application places of the laser correlation detector are limited.

Therefore, it is an urgent need to solve the problem of the art of laser detector that a laser correlation detector that can be applied in a cluster within a certain range, but does not interfere with each other and does not generate false alarm cannot be provided.

Disclosure of Invention

In view of the above, the present invention provides a method for realizing that the laser correlation detector clusters do not interfere with each other.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for realizing that the cluster application of the laser correlation detector does not interfere with each other is characterized in that the laser detector comprises a laser transmitter and a laser receiver matched with the laser transmitter; the laser transmitter is provided with a laser transmitter, a laser modulation and data communication management microprocessor, a communication address dial switch, a last communication address switch, a 485 communication processor and a power circuit; the laser receiver is provided with a laser receiver, a laser signal demodulation and identification microprocessor, an alarm signal processing and output control microprocessor and a power circuit; the method comprises the following specific operation steps: all laser transmitters in the cluster are connected in series through a 485 communication line to form a cluster, a laser modulation and data communication management microprocessor in the laser transmitter at an initial address sends out a communication instruction through a 485 communicator to enable the communication instruction to be communicated with other laser transmitters connected with the 485 communication line, when the laser transmitter at the initial address confirms that the communication with the laser transmitters at other addresses is normal, the laser transmitter at the initial address sends out instructions to all the laser transmitters in the cluster connected with the 485 communication line, the laser transmitters are sequenced according to different address codes and sequentially and circularly transmit modulated and encrypted laser signals in turn, namely, after the laser transmitter at the address 1 sends out a round of modulated and encrypted laser signals, then the laser transmitter at the address 2 sends out a round of modulated and encrypted laser signals, and then the laser transmitter at the address 3 sends out a round of modulated and encrypted laser signals, and sequentially and alternately going backwards until the laser transmitter which is switched on by the last communication address switch transmits a round of modulated encrypted laser signals, one cycle is finished, the previous cycle is repeated, and all the laser transmitters in the cluster connected with the 485 communication line continuously and repeatedly work in a cycle mode.

Preferably, in the method for realizing non-interference of cluster application of the laser correlation detector, in the cluster application, 485 communication lines of all laser transmitters are connected in series, and a communication address dial switch of each laser transmitter is set to be a unique address code, wherein one laser transmitter communication address dial switch is set to be a starting address code defined by a laser modulation and data communication management microprocessor; the last communication address switch of the last laser transmitter is set to the last transmitter state defined by the laser modulation and data communication management microprocessor.

Through the technical scheme, compared with the prior art, the invention adds the 485 communication processor and the communication address dial switch on the laser transmitter of the laser correlation detector, connects a plurality of pairs of laser transmitters of the laser correlation detector applied to a cluster through 485 communication lines, sets different address codes for each laser transmitter to form a cluster with communicated information, in the whole laser transmitter cluster connected with the 485 communication lines, the laser transmitters with different communication address codes alternately transmit laser signals according to the communication address coding sequence, in one 485 communication cluster, only one laser transmitter always transmits the laser signals at any time point, and mutual covering interference of light beams and afterglow of adjacent laser transmitters can not be formed, thus thoroughly solving the problem that in the traditional laser correlation application, in a small-range space, when many pairs of laser correlation detectors use back to back or shoulder to shoulder, because the laser transmitter mutual independence that a plurality of wavelengths are the same and all are launching laser signal simultaneously, a plurality of adjacent laser transmitter light beam afterglow cover each other, form mutual interference, lead to the difficult problem that laser receiver appears irregular wrong report.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic diagram illustrating a plurality of adjacent pairs of back-to-back installation in the prior art.

FIG. 3 is a schematic diagram of a plurality of adjacent pairs of side-by-side installation in the prior art.

In fig. 1: the system comprises a laser transmitter 1, a laser receiver 2, a laser transmitter 3, a laser modulation and data communication management microprocessor 4, a communication address dial switch 5, a last communication address switch 6, a 485 communication processor 7 and a power circuit 8, wherein the laser transmitter is connected with the laser receiver through a communication interface; 9 is a laser receiver, 10 is a laser signal demodulation and identification microprocessor, and 11 is an alarm signal processing and output control microprocessor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a method for preventing mutual interference in cluster application of laser correlation detectors disclosed in the present invention specifically includes:

the laser device comprises a laser transmitter 1 and a laser receiver 2 matched with the laser transmitter 1; the laser transmitter is provided with a laser transmitter 3, a laser modulation and data communication management microprocessor 4, a communication address dial switch 5, a last communication address switch 6, a 485 communication processor 7 and a power circuit 8; the laser receiver 2 is provided with a laser receiver 9, a laser signal demodulation and identification microprocessor 10, an alarm signal processing and output control microprocessor 11 and a power circuit 8; the method comprises the following specific operation steps: all laser transmitters in the cluster are connected in series through a 485 communication line to form a cluster, a laser modulation and data communication management microprocessor in the laser transmitter at an initial address sends out a communication instruction through a 485 communicator to enable the communication instruction to be communicated with other laser transmitters connected with the 485 communication line, when the laser transmitter at the initial address confirms that the communication with the laser transmitters at other addresses is normal, the laser transmitter at the initial address sends out instructions to all the laser transmitters in the cluster connected with the 485 communication line, the laser transmitters are sequenced according to different address codes and sequentially and circularly transmit modulated and encrypted laser signals in turn, namely, after the laser transmitter at the address 1 sends out a round of modulated and encrypted laser signals, then the laser transmitter at the address 2 sends out a round of modulated and encrypted laser signals, and then the laser transmitter at the address 3 sends out a round of modulated and encrypted laser signals, and sequentially and alternately going backwards until the laser transmitter with the last communication address switch opened transmits a round of modulated encrypted laser signals, finishing one cycle, and then repeating the previous cycle.

In order to further optimize the technical scheme, the number of the laser transmitters and the number of the laser receivers are N, N is a natural number greater than 1, and the laser transmitters correspond to the laser receivers.

In order to further optimize the technical scheme, in the cluster application, 485 communication lines of all laser transmitters are connected in series, and a communication address dial switch of each laser transmitter needs to be set to be a unique address code, wherein one laser transmitter communication address dial switch is set to be a starting address code defined by a laser modulation and data communication management microprocessor; the last communication address switch of the last laser transmitter is set to the last transmitter state defined by the laser modulation and data communication management microprocessor.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.