TWI630405B - Laser jammer - Google Patents

Abstract

The invention relates to a laser jammer, comprising: an optical receiver for receiving incident laser light including a plurality of incident pulse waves and generating an incident light signal associated with the complex incident pulse wave; a light emitter; The processing unit calculates an interval time between adjacent ones of the plurality of incident pulse waves according to the incident light signal, and drives the light emitter to generate an interference laser light, where the interference laser light includes a plurality of interference pulse waves, and the complex interference The pulse waves are intermittently emitted at intervals of the plurality of incident pulse waves, and each continues until overlaps with one of the incident pulse waves.

Description

Laser jammer

The present invention relates to a laser jammer.

The principle of laser detection utilizes laser light emitting a specific wavelength and a specific transmitted signal frequency to the object to be detected, and receives the laser light reflected by the detected object, thereby detecting the detected object.

Conventional laser jammers generally cover the reflected laser light by continuously emitting an interference laser light after receiving the laser light of the detector. However, such conventional techniques do not further analyze and compare the wavelengths of the laser light, the signal transmission frequency, and the amplitude of the detector, and the effect is poor.

Therefore, it is necessary to provide a novel and progressive laser jammer to solve the above problems.

The main object of the present invention is to provide a laser jammer that is precise and energy efficient.

To achieve the above object, the present invention provides a laser jammer, comprising: an optical receiver for receiving incident laser light including a plurality of incident pulse waves and generating an incident light signal associated with the complex incident pulse wave; a light emitting device; a processing unit, calculating an interval time between adjacent ones of the plurality of incident pulse waves according to the incident light signal, and driving the light emitter to generate an interference laser light, The interfering laser light includes a plurality of interfering pulse waves, the complex interfering pulse waves being intermittently emitted at intervals of the plurality of incident pulse waves, and each continuing until overlapping with one of the incident pulse waves.

1‧‧‧Laser jammer

10‧‧‧Optical Receiver

11‧‧‧Incoming optical signal

11a, 11b‧‧‧Amplified signal

11c‧‧‧ Peak section

12‧‧‧Photoelectric diode

20‧‧‧Light emitter

21‧‧‧Interference with laser light

22‧‧‧Interference pulse

23‧‧‧Laser diode

30‧‧‧Processing unit

33‧‧‧ Processor

34‧‧‧Drive circuit

35‧‧‧ comparator

36‧‧‧ Circuitry

37‧‧‧metal cover

38‧‧‧ boards

39‧‧‧Inters

40‧‧‧Injected laser light

41‧‧‧Injected pulse wave

50‧‧‧Filter lens

60‧‧‧ Shell

31‧‧‧First stage amplifier

32‧‧‧second stage amplifier

61‧‧‧External structure

T‧‧‧ interval

1 is a perspective view of a preferred embodiment of the present invention.

2 is an exploded view of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.

4 is a block diagram showing the structural relationship of a preferred embodiment of the present invention.

FIG. 5 is a schematic diagram of signal processing according to a preferred embodiment of the present invention.

FIG. 6 is a schematic diagram of signal interference according to a preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIGS. 1 through 6, there is shown a preferred embodiment of the present invention. The laser jammer 1 of the present invention includes an optical receiver 10, a light emitter 20, and a processing unit 30.

The optical receiver 10 is configured to receive an incident laser light 40 comprising a plurality of incident pulse waves 41 and to generate an incident optical signal 11 associated with the plurality of incident pulse waves 41. The processing unit 30 calculates an interval time T between adjacent ones of the plurality of incident pulse waves 41 according to the incident light signal 11, and drives the light emitter 20 to generate an interference laser light 21, the interference laser light 21 including a plurality The interfering pulse wave 22 is intermittently emitted within the interval T of the plurality of incident pulse waves 41, and each of them continues to overlap with one of the incident pulse waves 41. Thereby, one of the laser detectors that emits the incident laser light 40 can be disturbed.

The frequency of the transmitted signal of the interfering laser light 21 is the same as the frequency of the transmitted signal of the incident laser light 40, ensuring synchronous interference with the incident laser light that the laser detector receives the reflection. The amplitude of the interfering pulse wave 22 is preferably greater than the amplitude of the incident pulse wave 41 to effectively cover the incident pulse wave 41. Each of the interfering pulse waves 22 continues to overlap with more than 1/2 of one of the incident pulse waves 41, preferably overlaps by more than 3/4, or even completely overlaps, to completely block and interfere with the reflection of the laser detector. The incident laser light. Preferably, the number of the complex incident pulse waves 41 is at least three, and the interference laser light 21 is emitted relative to the first three incident pulse waves 41 thereof to determine the wavelength of the light that the received incident pulse wave 41 has. The nature of the signal transmission frequency, amplitude, etc., is indeed incident on the target of the desired interference, avoiding misjudgment and the optical transmitter 20 unnecessarily transmitting the interference laser light 21, which is accurate and energy-saving.

In detail, the photoreceiver 10 includes at least one photodiode 12 having a light receiving angle of 40 to 80 degrees, preferably a plurality of photodiodes 12 for lifting The receiving range of the optical receiver 10 is not missed. The light emitter 20 includes at least one laser diode 23 having a light emission angle of between 15 and 45 degrees, and the interference laser light 21 is concentrated as much as possible in a more effective light emission range. Inside, it helps to interfere with the effect. The number of the at least one laser diode 23 may be plural, and may include a laser diode capable of emitting different wavelengths. The wavelength of the incident laser light 21 and the incident laser light 40 is between 850 nm and 910 nm, and the transmitted signal frequency is between 100 Hz and 600 Hz. However, the above-mentioned only common laser detection is exemplified. The wavelength range used by the detector may actually be different according to different requirements. Even the laser jammer 1 may be additionally provided with a transmission signal frequency adjustment circuit for adjusting the frequency of the transmitted signal of the interference laser light 21.

The processing unit 30 includes a first stage amplifier 31 coupled to the optical receiver 10, a second stage amplifier 32 coupled to the first stage amplifier 31, and a processor 33 coupled to the second stage amplifier 32. The processor 33 is coupled to the light emitter 20. The first stage amplifier 31 processes the incident light signal 11 into an amplified signal 11a. The second stage amplifier 32 processes the amplified signal 11a into an amplified signal 11b. The interval signal T of the amplification signal 11b is driven by a driving circuit 34 to drive the light emitter 20 generates the interference laser light 21. The first stage amplifier 31 is a transistor amplifier, which can amplify the original waveform. The second stage amplifier 32 is preferably a video amplifier, and the amplified signal 11a amplified by the transistor amplifier can be further amplified and converted into a square amplifier. Wave pattern. The processing unit 30 further includes a comparator 35 connected between the video amplifier and the processor 33. The comparator 35 is provided with a threshold. The comparator 35 only allows the amplified signal 11b processed by the video amplifier to be greater than The peak portion 11c of the threshold passes, and the interval between the adjacent ones of the peak portions 11c is separated by the interval time T. The amplification signal 11a is processed into a square wave pattern via the video amplifier, which can facilitate the processor 33 to perform digitization processing and filter the other unwanted noises through the comparator 35 (possibly from different environments in the environment). Light) can increase the processing speed and determine the correctness of the signal source and reduce the load of the processor 33. Of course, the first stage amplifier 31 and the second stage amplifier 32 may also be transistor amplifiers, as long as the processor 33 has sufficient data processing capability. The threshold value can be set to a voltage value, a current value or an amplitude value of the amplification signal 11b. For example, the threshold value is set to a voltage value of the amplification signal 11b, and the voltage value is set, for example, to 2 volts (V). The laser jammer 1 may also be provided with a threshold adjustment or switching circuit to adjust the threshold according to different requirements, or to switch the threshold value to any one of a voltage value, a current value and an amplitude value. The above-mentioned communication generally refers to a wired or wireless manner.

The first stage amplifier 31, the second stage amplifier 32 and the comparator 35, and the circuit 36 electrically connected therebetween are preferably shielded by a metal cover 37 to reduce external signals, electromagnetic waves and the laser interference. The interference of other circuits of the device 1 (for example, the optical transmitter 20 and the circuit connected thereto) ensures that the signal received by the optical receiver 10 is undisturbed and undistorted, thereby improving signal judgment accuracy. The circuit 36 is disposed on a circuit board 38. Preferably, the metal cover 37 is disposed on opposite sides of the circuit board 38. A gap 39 exists between the metal cover 37 and the circuit board 38. The gap 39 is connected, for example, across the portion of the circuit 36 between the optical receiver 10 and the light emitter 20 to prevent the metal cover 37 from interfering or causing a short circuit.

Preferably, a filter lens 50 is further disposed in front of the optical receiver 10, and the filter lens 50 is only allowed to be, for example, only 700 nm to 950 nm (preferably and limited to between 700 nm and 900 nm). The light of the wavelength passes, and the filter lens 50 is preferably a plastic material, which has good light transmittance, is not easy to be brittle, and is inexpensive. The filter lens 50 first filters out a relatively undesired wavelength to reduce the data processing load of the processing unit 30, and can increase the processing speed and determine the correctness of the signal source. Preferably, if only a specific wavelength of laser light is allowed to pass through the filter lens 50, the incident light pulse 41 of the two incident laser light 40 can be received, and the light emitter 20 can be driven to generate the interference. Laser light 21, the interference is faster and more accurate.

The laser jammer 1 preferably further includes a plastic or metal casing 60 to protect its internal components. The outer casing 60 is provided with an attachment structure 61 for mounting, such as a screw hole, a buckle, a magnetic member, or any mechanism that can be relatively fixed to the corresponding mounting member.

Claims (10)

A laser jammer, comprising: an optical receiver for receiving incident laser light including a plurality of incident pulse waves and generating an incident light signal associated with the complex incident pulse wave; a light emitter; a processing unit, Calculating an interval time between adjacent ones of the plurality of incident pulse waves according to the incident light signal, and driving the light emitter to generate an interference laser light, the interference laser light comprising a complex interference pulse wave, the complex interference pulse wave interruption Each of the grounds is emitted during an interval between the plurality of incident pulse waves, and each continues until overlaps with one of the incident pulse waves. The laser jammer of claim 1, wherein the amplitude of the interference pulse is greater than the amplitude of the incident pulse. The laser jammer of claim 1, wherein each of the interference pulses continues to overlap one or more of the incident pulse waves. The laser jammer of claim 1, wherein the frequency of the transmitted signal of the interfered laser light is the same as the frequency of the transmitted signal of the incident laser light. The laser jammer of claim 1, wherein the number of the complex incident pulse waves is at least three. The laser jammer of any one of claims 1 to 5, wherein the processing unit comprises a first stage amplifier coupled to the optical receiver, a second stage amplifier coupled to the first stage amplifier, a processor coupled to the second stage amplifier, the processor is coupled to the optical transmitter, the first stage and second stage amplifiers process the incident optical signal to form an amplified signal, and the processor is based on the amplified signal interval time, And driving the light emitter to generate the interference laser light. The laser jammer of claim 6, wherein the first stage amplifier is a transistor amplifier, the second stage amplifier is a video amplifier, and the processing unit further comprises a communication between the video amplifier and the processor. a comparator, the comparator is provided with a threshold, the comparator only allowing the amplification signal processed by the video amplifier to pass through a peak portion of the threshold, and the adjacent ones of the peak portions are spaced apart Intervals. The laser jammer of claim 7, wherein the threshold is set to a voltage value, a current value, or an amplitude value of the amplified signal. A laser jammer according to claim 1, wherein a filter lens is provided in front of the light receiver, the filter lens only allowing light of a wavelength of from 700 nm to 950 nm to pass. The laser jammer of claim 8, wherein the light receiver comprises at least one photodiode, the light emitter comprises at least one laser diode; the photodiode has a range of 40 to 80 a light receiving angle, the laser diode has a light emission angle of between 15 degrees and 45 degrees; the interference laser light has the same frequency as the emission signal of the incident laser light, and the interference laser light and the incident laser light The wavelength is between 850 nm and 910 nm, and the transmitted signal frequency is between 100 Hz and 600 Hz; the amplitude of the interfering pulse wave is greater than the amplitude of the incident pulse wave; each of the interfering pulse waves continues to overlap One of the incident pulse waves is more than 3/4; the number of the complex incident pulse waves is at least three, and the interfering laser light is emitted relatively after the first three incident pulse waves; and the optical receiver is additionally provided before the optical receiver There is a filter lens that is plastic and allows only light of wavelengths from 700 nm to 900 nm to pass.