TWM451527U - Phase type laser range finder counter system - Google Patents

Description

Phase laser range finder counter system

The present invention relates to a phase laser range finder counter-system, in particular to a phase-type laser range finder counter system with phase delay function, which has the advantages and effects of interfering with the range finder.

In today's war, in order to reduce the casualties and expenditures of their own personnel, the new weapons must not only have strong firepower, but also pay attention to the development of counter-attacks and stealth technologies.

After the Second World War, the development of wireless communication technology can be said to be leaps and bounds, especially in the military investigation, and all countries are eager to lead the detection technology. At the same time, invisible technology in electronic counter-attack and disappearance ( The stealth technology aspect is also generally valued.

In addition to the development of the weapon system, the safety design of the national army wheel-type car is only for the passive design of armor protection. Compared with the protection of the foreign photoelectric operation control system, there is no counter-production. In view of this, in order to improve the armored vehicle Defensive ability, preservation of power vehicle combat power, the need to develop anti-cannon lock lock equipment.

The purpose of this creation is to provide a phase laser range finder reverse system, which has the advantages and effects of the interference of the range finder, and is used to solve the problem of the development of the national army wheel type car.

The technical means for solving the above problems is to provide a phase laser range finder counter system, which comprises: An infrared receiving unit is configured to receive a ranging signal of a laser range finder; a signal processing identification unit is configured to process and identify the ranging signal; and a signal copy delay unit is configured to copy the signal processing identification The unit processed the ranging signal and delays its phase to form a counter signal; a laser driven transmitting unit for transmitting the counter signal to the laser range finder; an optical mirror system for introducing The ranging signal and the derivation signal are derived; thereby, when the ranging signal of the laser range finder enters the optical lens group, it is guided to the infrared receiving unit, and then the signal processing identification unit performs Processing, and delaying the phase by the signal replica delay unit to form a counter signal, and finally outputting the counter signal by the laser driving unit, and transmitting to the laser through the guiding of the optical lens group Distance meter.

The above objects and advantages of the present invention will be readily understood from the following detailed description of the embodiments and the accompanying drawings.

The following examples are used in conjunction with the drawings to illustrate the creation in detail:

As shown in the first and second figures, the present invention is a phase laser range finder counter system 100, comprising: an infrared receiving unit 10, a signal processing identification unit 20, a signal replication delay unit 30, A laser drives the firing unit 40 and an optical lens assembly 50.

The infrared receiving unit 10 is configured to receive a laser range finder The distance measurement signal of 70 is 70A.

The signal processing identification unit 20 is configured to process and identify the ranging signal 70A.

The signal replication delay unit 30 is configured to copy the ranging signal 70A processed by the signal processing identification unit 20 and delay its phase to form a counter signal 75.

The laser driven firing unit 40 is configured to transmit the counter signal 75 to the laser range finder 70.

The optical lens set 50 is used to introduce the ranging signal 70 and derive the counter signal 75; thereby, when the ranging signal 70A of the laser range finder enters the optical lens set 50, it is guided. The infrared receiving unit 10 is processed by the signal processing and recognizing unit 20, and the phase delay is delayed by the signal replica delay unit 30 to form a counter signal 75. Finally, the laser is driven by the transmitting unit 40. The output signal 75 is output to the laser range finder 70 by the guidance of the optical lens assembly 50.

As shown in the first figure, the phased laser range finder counter system 100 of the present invention is set on a car 80. After receiving the ranging signal 70A, the phased laser range finder of the present invention is reversed. The system 100 transmits the reflected signal 75 to the laser range finder 70 to misjudge the actual distance; of course, in addition to the car of the first figure, the creation can also be used for defense weapons, such as chariots, and then bullying. A laser range finder that interferes with the enemy.

Referring to the third figure, the infrared receiving unit 10 has a light sensor 11, a transimpedance amplifier 12 and an automatic gain control circuit 13; the signal processing identification unit 20 has a Schmitt trigger circuit 21 a monostable trigger circuit 22, a frequency-to-voltage circuit 23, an analog-to-digital circuit 24, a microprocessor 25, a display warning circuit 26, and a memory 27; the laser-driven transmitting unit 40 has a The semiconductor laser diode 41 and a driving circuit 42.

The optical sensor 11 is configured to receive the ranging signal 70A of the laser range finder 70 and generate a current signal (that is, the incident optical power is converted into a corresponding photocurrent output); the transimpedance amplifier 12 is used to The current signal is converted into a voltage signal; and the automatic gain control circuit 13 is configured to perform automatic gain control (Auto Gain Control) on the voltage signal.

Since the specification requires dual-band reception and transmission, it is necessary to select a photo-sensing device 11 with a spectral response covering 905 nm and 1500 nm (for example, LAPD-2000S produced by Li Ding Optoelectronics Co., Ltd., whose spectral response range is 500 to 1000 nm, which meets the requirements of the system. The transimpedance amplifier 12 is a pre-amplifier, and its characteristics will directly affect the overall system noise and stability, so it must have high broadband, high input impedance and low current drift characteristics (eg: OPA655 turn) The resistive amplifier); and the automatic gain control circuit 13 uses the AD603 automatic gain control circuit.

Regarding the Schmitt trigger 21, an IC HEF 40106, which is a reverse Schmitt trigger, can be used to convert the ranging signal 70A into a complete square wave; The square wave frequency after the shaping will be the same as the frequency of the received ranging signal 70A, but the duty cycle is relatively small, about less than 1%, and the duty cycle must be adjusted to more than 10% via the monostable trigger circuit 22, The frequency-to-voltage circuit 23 can output a normal relative voltage; the analog-to-digital circuit 24 is configured to convert the frequency converted voltage value into a digital signal and compare it with the built-in database of the microprocessor 25, However, the same as the data in the database, the alarm circuit 26 is displayed to alert the alarm (like the speed camera warning device installed in the general automobile, the warning driving is approaching the speed camera device).

The signal replica delay unit 30 has a replica circuit 31 and a delay circuit 32. The replica circuit 31 has a logic gate 311 and a transistor 312. The logic gate 311 is connected to the Schmitt trigger 21; The delay circuit 32 is connected to the transistor 312; thereby, when the infrared receiving unit 10 does not receive the ranging signal 70A, the transistor 312 is in an off state, and when the infrared receiving unit 10 receives the ranging signal At 70A, the transistor 312 is in an on state, and a signal of the same frequency is reproduced and outputted to the drive circuit 42 of the laser drive transmitting unit 40 after being delayed by the delay circuit 32.

The replica circuit 31 can adopt a commercially available SN75451B circuit IC, and the maximum collector output current can reach 300 Ma, and the switching speed is only 25 nanoseconds at most (equivalently negligible). As shown in the fourth figure, the logic gate 311 has A first input terminal 311A and a second input terminal 311B are connected to the Schmitt trigger 21 (a commercially available product is provided with two logic gates 311, and only one of the creations can be used in the creation). ); please refer to the fourth figure and the first table, assuming the first loser When the fixed input of the input terminal 311A is high (>2V), the output state of the transistor 312 changes with the second input terminal 311B. When the infrared receiving unit 10 does not receive the ranging signal 70A, the reverse Schmitt trigger (ie, the Schmitt trigger 21) outputs a high potential, and the second input 311B output is also a high potential. The transistor 312 is in an off state; when the infrared receiving unit 10 receives the ranging signal 70A, the reverse Schmitt trigger outputs a low potential due to the reverse direction, and the second input terminal 311B outputs a low output. At the potential, the transistor 312 is turned on and the signal is passed to the delay circuit 32 for delay.

Regarding the delay circuit 32, the circuit is mainly composed of a first integrated circuit board 321 (this is IC74LS193) and a second integrated circuit board 322 (this is 74LS174). The operating principle is as follows: when digital signal processing After the clock of 62.5 nanoseconds is generated to the first integrated circuit board 321, the first integrated circuit board 321 is divided by the first integrated circuit board 321 to output a clock of 0.5 microseconds to the second integrated circuit board 322. The trigger clock input pin 3221 can delay the time of 3 microseconds after the IGBT trigger signal is delayed by the six cascaded D-type flip-flops 3222 in the second integrated circuit board 322.

It can be seen that, if the design of the creation receives a continuous pulsed laser signal, the laser pulse signal of the same frequency can be reproduced at the first time, the extension optical path is transmitted back, and the distance measuring instrument is disturbed to make the ranging error; The counter signal 75 is output only when the ranging signal 70A is received.

The semiconductor laser diode can be selected from the domestic products of Youjia Technology, the laser wavelengths are 980nm and 1550nm, respectively, and the high power continuous output type (CW; Continue Wave) infrared laser diode.

In more detail, the design of the creation can be divided into two types: transmission and reception coaxial and reflection imaging tracking.

[a] Reflective imaging tracking. As shown in the fifth figure, this type is designed to include a four-quadrant imaging tracker 61 and an image capturing device 62. The optical lens assembly 50 has a first reflecting mirror 51 and a first splitting light. The mirror 52, a second beam splitter 53, and three lenses 54; an infrared light ranging signal 70A enters the optical mirror 50, and is first reflected by the first mirror 51 to the first beam splitter 52. Passing through the first beam splitter 52 to the second beam splitter 53 to form a penetration and reflection, respectively guided by the two lenses 54 to the four-quadrant imaging tracker 61 and the image capturing device 62; The ranging signal 70A to the four-quadrant imaging tracker 61 is then transmitted to the infrared receiving unit 10, the signal processing identification unit 20, and the signal replica delay unit 30 for processing to form a counter The signal 75 is finally emitted by the laser-driven transmitting unit 40, and is transmitted through the lens 54 and reflected by the first beam splitter 52 and the first mirror 51 to be emitted outward. In addition, the optical lens assembly 50 is further provided with a lens angle adjusting device 51A for adjusting the reflection angle of the first mirror 51.

[b] Transmit and receive coaxial type. As shown in the sixth figure, this type is designed, the laser drive transmitting unit 40 of the present invention is a plurality of pulse wave laser emitters 411; the optical lens set 50 has a telescope group 56, a filter 57. A lens 54 and two mirrors 59. The telescope group 56 (responsible for signal receiving and aiming) has a primary mirror 561 and a secondary mirror 562. The primary mirror 561 is used to light The refraction is collected to the secondary mirror 562, and the secondary mirror 562 is focused on the filter 57. After the infrared light ranging signal 70A enters the optical lens assembly 50, it is first refracted by the primary mirror 561 to be collected. The secondary mirror 562 is focused on the filter 57 by the secondary mirror 562, and then received by the infrared receiving unit 10, and processed by the signal processing identification unit 20 and the signal replica delay unit 30 to form a counter The signal 75 is finally emitted by the laser-driven transmitting unit 40, and is emitted by the lens 54 after being reflected by the two mirrors 59; and the advantages of the plurality of pulsed laser emitters are obtained. The operating frequency of the pulse laser is adjustable, and can be applied to various frequency pulses. Laser rangefinder carried out counter.

About the experimental process of this creation, a near-infrared laser (905nm) range finder is used as a transmitter, and the phase-type laser range finder reverse system 100 is located at a distance, and the phase laser range finder is used. The counter system 100 receives the message and processes it. After that, the counter signal 75 is issued, so that the range finder produces an error in accuracy; as can be seen from the second table, the range finder will judge different distances when it is interfered by the counter signal 75. When the actual distance is 10, 13, 14, 17, 20, 28, 32, 35 meters, due to the phase delay in the counter signal 75, the distance measured by the range finder is 102, 105, 106 respectively. 110, 113, 120, 125, 128 meters; thus, it can be known that this creation can effectively achieve counter-measure and cause the range finder to misjudge.

The waveform of the experimental result is as shown in the seventh and eighth figures. A first curve L1 is a waveform of the ranging signal 70A emitted by the range finder, and a second curve L2 is a counter signal 75 issued by the creation. The waveform, by comparison, shows that the phase of the counter signal 75 of the present creation is significantly different from the ranging signal 70A, so that the purpose of misjudgement of the range finder can be achieved.

In addition, the process time for receiving the ranging signal 70A to the counter signal 75 is 5 μs~30 μs (microseconds, 10 ^-6 seconds), which can be counter-made in a very short time, so it can be effectively The range finder is countered.

In summary, the advantages and effects of this creation can be summarized as: Interpretation of the interference rangefinder. In addition to the development of weapon systems, the safety design of the national military wheel-type car is only for the passive design of armor protection. Compared with the protection of the foreign photoelectric control system, there is no counter-production. The creative system can be active. The enemy's laser range finder is bullying and interfering, causing errors in distance interpretation, and thus achieving counter-effects; of course, this creation can also be applied to non-defense purposes, such as: applied to general cars, and then Counter-measures the speed measuring device that uses the laser range finder to measure the speed on a general road.

The above is only a detailed description of the present invention by way of a preferred embodiment, and any modifications and variations of the embodiments are possible without departing from the spirit and scope of the present invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the aforementioned objectives, and has been in compliance with the provisions of the Patent Law, and proposes a new type of patent application.

100‧‧‧Phase laser rangefinder counter system

10‧‧‧Infrared receiving unit

11‧‧‧Light Sensor

12‧‧‧Transistor Amplifier

13‧‧‧Automatic gain control circuit

20‧‧‧Signal Processing Identification Unit

21‧‧‧Schmitt trigger circuit

22‧‧‧monostable trigger circuit

23‧‧‧frequency to voltage circuit

24‧‧‧ Analog-to-digital circuit

25‧‧‧Microprocessor

26‧‧‧Display warning circuit

27‧‧‧ memory

30‧‧‧Signal replication delay unit

31‧‧‧Reproduction circuit

311‧‧‧Logic gate

311A‧‧‧ first input

311B‧‧‧ second input

312‧‧‧Optoelectronics

32‧‧‧Delay circuit

321‧‧‧First integrated circuit board

322‧‧‧Second integrated circuit board

3221‧‧‧clock input pin

3222‧‧‧D type flip-flop

40‧‧‧Laser Drive Transmitter

41‧‧‧Semiconductor laser diode

42‧‧‧Drive circuit

411‧‧‧ Pulse Laser Launcher

50‧‧‧Optical mirror

51‧‧‧First mirror

51A‧‧‧ lens angle adjustment device

52‧‧‧First Beamsplitter

53‧‧‧Second beam splitter

54‧‧‧ lens

56‧‧‧ Telescope Group

561‧‧‧ primary mirror

562‧‧ ‧ mirror

57‧‧‧Filter

59‧‧‧Mirror

61‧‧‧ four-quadrant imaging tracker

62‧‧‧Image capture device

70‧‧‧Laser rangefinder

70A‧‧‧Ranging signal

75‧‧‧Counter signal

80‧‧‧Car

The first picture is a schematic diagram of the phased laser range finder reverse system applied to a car.

The second picture is a schematic diagram of the phase-type laser range finder counter system of the present creation.

The third picture is the circuit diagram of the phase-type laser range finder reverse system of the creation.

The fourth figure is a schematic diagram of the circuit relationship of the copy delay unit of the present creation.

The fifth picture is a schematic diagram of the structure type of the creation.

The sixth picture is a schematic diagram of the structure type 2 of this creation.

The seventh picture is a schematic diagram of the waveform of the ranging signal emitted by the range finder

The eighth picture is a schematic diagram of the counter signal waveform of this creation.

10‧‧‧Infrared receiving unit

11‧‧‧Light Sensor

12‧‧‧Transistor Amplifier

13‧‧‧Automatic gain control circuit

20‧‧‧Signal Processing Identification Unit

21‧‧‧Schmitt trigger circuit

22‧‧‧monostable trigger circuit

23‧‧‧frequency to voltage circuit

24‧‧‧ Analog-to-digital circuit

25‧‧‧Microprocessor

26‧‧‧Display warning circuit

30‧‧‧Signal replication delay unit

40‧‧‧Laser Drive Transmitter

41‧‧‧Semiconductor laser diode

42‧‧‧Drive circuit

50‧‧‧Optical mirror

70A‧‧‧Ranging signal

75‧‧‧Counter signal

Claims (4)

A phase laser range finder counter system includes: an infrared receiving unit for receiving a ranging signal of a laser range finder; a signal processing identification unit for processing the ranging signal and Identification; a signal replication delay unit for replicating the ranging signal processed by the signal processing identification unit and delaying its phase to form a counter signal; a laser driving transmitting unit for transmitting the counter signal to The laser range finder; an optical mirror set for introducing the ranging signal and deriving the counter signal; thereby, when the ranging signal of the laser range finder enters the optical mirror group, the system is guided Leading to the infrared receiving unit, and then processing by the signal processing and identifying unit, and delaying the phase by the signal copying delay unit to form a counter signal, and finally outputting the counter signal by the laser driving transmitting unit, The laser range finder is emitted by the guidance of the optical lens. The phase-type laser range finder reverse system of claim 1, wherein the infrared receiving unit has a light sensor, a transimpedance amplifier and an automatic gain control circuit; the signal processing identification unit The system has a Schmitt trigger circuit, a monostable trigger circuit, a frequency-to-voltage circuit, an analog-to-digital circuit, a microprocessor, a display warning circuit and a memory; the signal replication delay unit has a replica circuit and a delay circuit; the laser driven emission unit has a semiconductor laser a polar body and a driving circuit; the optical sensor is configured to receive a ranging signal of the laser range finder and generate a current signal; the transimpedance amplifier is configured to convert the current signal into a voltage signal; The automatic gain control circuit is configured to perform automatic gain control on the voltage signal; the Schmitt trigger is used to convert the ranging signal into a complete square wave, and the monostable trigger circuit adjusts the square wave The duty cycle is further outputted by the frequency-to-voltage circuit into a normal relative voltage; the analog-to-digital circuit is used to convert the voltage value converted by the frequency-to-voltage circuit into a digital signal and compare it with a microprocessor. When the comparison data is the same, the warning circuit is used to provide an alarm reminder; the copy circuit has a logic gate and a transistor, and the logic gate is connected to the Schmitt trigger; the delay circuit is connected to the transistor; When the infrared receiving unit does not receive the ranging signal, the transistor is in an off state, and when the infrared receiving unit receives the ranging signal, the transistor is in an on state. Signal of the same frequency of the system, and after the delay through the delay circuit is output to the laser driving circuit of the driving transmitting unit. The phase-type laser range finder counter system of claim 1, further comprising a four-quadrant imaging tracker and an image capturing device; the optical lens set has a first mirror, and a a first beam splitter, a second beam splitter, and three lenses; after an infrared light ranging signal enters the optical mirror group, The first mirror is first reflected by the first mirror to the first beam splitter, and penetrates the first beam splitter to the second beam splitter to form a penetration and reflection, which are respectively guided to the four quadrants through two lenses. An imaging tracker and the image capturing device; the ranging signal guided to the four-quadrant imaging tracker is further transmitted to the infrared receiving unit, the signal processing identification unit and the signal replication delay unit for processing to form a counter The signal is finally emitted by the laser-driven transmitting unit, and is transmitted through the lens and reflected by the first beam splitter and the first mirror; and the optical mirror is further provided with a signal a lens angle adjusting device for adjusting a reflection angle of the first mirror. The phase-type laser range finder counter system according to claim 1, wherein the laser-driven transmitting unit is a plurality of pulse wave laser emitters; the optical mirror group has a telescope group, a filter, a lens and a two mirror, the telescope assembly having a primary mirror and a primary mirror for collecting light refraction to the secondary mirror, and then focusing the secondary mirror on the filter After the infrared distance measuring signal enters the optical lens group, the primary mirror is first refracted and collected by the primary mirror to the secondary mirror, and the secondary mirror is focused on the optical filter, and then received by the infrared receiving unit. And the signal processing identification unit and the signal replication delay unit are processed to form a counter signal, and finally the laser driving unit emits the counter signal, and the lens is reflected by the two mirrors and then outward. emission.