KR100199206B1 - Optical proximity fuzes - Google Patents

Abstract

In the optical proximity fuse which transmits the laser light and receives and processes the signal reflected by the target to generate the detonation signal, the wiring state check, the transmit / receive signal check, and the detonation output check are performed to check the normality of the fuse. It is about the inspection device to hide the operation.

The present invention provides a check well for mounting a fuse to be inspected for transmitting and receiving laser light between the fuse and the check device; A receiver which receives the laser light received from the check well, converts the laser light into an electrical signal, and amplifies the signal; A signal processing unit including a microcomputer for processing the signal transmitted from the receiving unit, outputting a reflected signal to the transmitting unit, checking the detonation signal from the fuse, and controlling the operation of the inspection apparatus according to a user's input operation; A transmitter for transmitting a reflected signal output from the signal processor to a fuse; A front panel indicator and indicator for displaying the operation check result of the fuse and assisting the user's input control; And it provides an operation checking device of the optical proximity fuse comprising a power supply for supplying a variety of power required for the operation of the fuse and check device.

Description

Operational check device of optical proximity fuse

The present invention relates to an apparatus for checking an operation of an optical proximity fuse, and more particularly, in an optical proximity fuse that transmits a laser beam and receives and processes a signal reflected by a target to generate an amplification signal. The present invention relates to an inspection apparatus for screening whether a fuse is normally operated by performing a transmission / reception signal inspection and an explosion output inspection.

A fuse is a device that causes the initial process of the explosive chain to ignite and explode the peony of the explosive device, and when the explosive is detonated, it explodes on the next explosive and finally ignites until the peony of the shell.

When the shell fuse is classified according to its function or function, it can be classified into an impact fuse, a time fuse, a peripheral fuse, a proximity fuse, and a command fuse.

The optical proximity fuse, which is the object of the present invention, transmits laser light through an optical transmitter, receives the reflected laser light from the target, processes the received signal, detects the distance to the target, and provides an optimum approach distance. The detonator is to be activated at the moment of detection.

Figure 1 shows the basic configuration of the target detection device of the optical neural proximity fuse.

This target detection device is largely comprised of a transmitter, a receiver, a signal processor, and a power supply.

The transmission unit includes a transmission optical device for unfolding the output of the laser diode in a fan shape, a laser diode serving as an energy source, and a driving circuit for driving the laser diode.

The receiver detects the reflected light energy and converts it into an electrical signal, a reception amplifier circuit for amplifying a weak signal detected by the photo detector, and a detection area of the signal received by the photo detector. And receiving optics.

The signal processor inputs the signal detected and amplified by the receiver, inputs it to the comparator, selects only signals above the set level, and judges the authenticity of the signal through a true signal discrimination algorithm to determine whether there is a target. Finally, it sends out the ignition command to the ignition circuit.

The power supply unit receives 28V of power from the thermal cell in the fuse and supplies power (+ 15V, -15V, + 5V, + 70V) required for each part of the target detection device.

The present invention is to check the various functions and electrical characteristics of the optical proximity fuse having the above-described configuration to perform the wiring status check, transmit and receive signal check, and detonation output check so that the user can easily check whether the fuse is normal operation It is about the checking device to check the normal operation of fuse.

The present invention is to check the wiring state of the optical proximity fuse, the program check of the fuse and inspection device, the safety check to occupy the safety state of the fuse, the transmission output check of the fuse, the signal processing algorithm check, the detonation output check, the self-explosion check and variable An object of the present invention is to provide a check device for screening whether a fuse is normally operated by performing a voltage check.

1 is a basic configuration of the target detection device of the optical proximity fuse.

2 is a basic configuration of the operation checking device of the optical proximity fuse according to the present invention.

3 is a circuit diagram showing an example of a laser diode driving circuit of a transmitter according to the present invention.

4 is a circuit diagram showing an example of a circuit configuration of a receiver according to the present invention.

5 is a block diagram showing a digital signal processing circuit in the signal processing unit according to the present invention.

* Explanation of symbols for main parts of the drawings

100: fuse 110: check well

115: optics 117: inspection cable

120: receiver 130: transmitter

150: signal processor 160: front panel indicator and indicator

170: power supply unit 180: inspection device self-diagnosis circuit

In order to achieve the above object, the present invention, whether or not the normal operation of the optical proximity fuse that transmits the laser light, receives a signal reflected by the target, detects the distance to the target and generates a detonation signal according to a predetermined condition An apparatus for inspecting, the apparatus comprising: a check well for mounting a fuse to be inspected to transmit and receive laser light between the fuse and the inspecting device; A receiver which receives the laser light received from the check well, converts the laser light into an electrical signal, and amplifies the signal; A signal processing unit for controlling the operation of the inspection apparatus according to the processing of the signal input through the receiving unit, the output of the reflected signal through the transmitting unit, the checking of the detonation signal from the fuse, and the user's input operation; A transmitter for transmitting a reflected signal output from the signal processor to a fuse; A front panel indicator and indicator for displaying the operation check result of the fuse and assisting the user's input control; And it provides an operation checking device of the optical proximity fuse comprising a power supply for supplying a variety of power required for the operation of the fuse and check device.

At this time, the transmission unit, a capacitor charging circuit composed of two stages of the first transistor and the second transistor, the oscillation and trigger circuit for applying a gate trigger signal of the SCR; And it is characterized by including a laser diode.

In this case, the receiver includes an amplifier circuit unit using a photodetector and a two-stage operational amplifier; A comparator circuit unit for converting an analog signal into a digital signal; And a peak value detection circuit unit for checking the peak value of the transmission pulse of the fuse.

EXAMPLE

Referring to the accompanying drawings illustrating a preferred embodiment of the present invention.

2 is a basic configuration of the operation checking device of the optical proximity fuse according to the present invention.

The fuse check is carried out after putting the fuse 100 to be checked in the housing (not shown) of the check well 110. The check well 110 is attached to the optical unit 115 consisting of four channels that are responsible for the optical interface with the fuse 100, the check well 110 and the signal processing unit of the operation check device according to the present invention Electrical interface with 150 is made through the check cable (117).

The signal processor 150 simulates various operation states to the fuse 100 through the check cable 117. At this time, the optical response and the signal according to the operation of the fuse 100 is processed by the signal processing unit 150 using the receiver 120 and the transmitter 130 of the operation check apparatus according to the present invention, the electrical output is checked cable ( The signal is transmitted back to the signal processor 150 through 117 to check whether it is in normal operation.

The front panel indicator and indicator 160 is a part that manipulates the inspection apparatus as desired by the user and displays the results clearly and clearly. This circuit section includes a selection switch for selecting the inspection type and a start switch for starting the inspection operation. The display unit includes a vacuum fluorescent display (VFD) device.

The power supply unit 170 is for supplying power to the circuits of the inspection device and the fuse 100. The AC power supply unit 170 receives AC 120V and outputs DC + 28V and DC + 28V to operate the circuit card in the inspection device. It consists of a power supply circuit that generates and supplies DC + 5V and ± 15V power required to control the fuse power.

The inspection well 110 may include a housing (not shown) capable of accommodating the fuse 100, an optical unit 115 capable of receiving and transmitting a laser light output from the fuse 100, and an electrical signal of the received light energy. And a receiving device for converting and amplifying the signal into a laser beam energy and receiving the reflected signal from the signal processing unit 150 and transmitting the converted signal to the fuse 100.

The optical unit 15 includes a reception optical device, a transmission optical device, an aperture for adjusting the amount of light, a solenoid for opening and closing the path of light, a beam splitter for distributing light, and a housing for fixing the parts.

The optical unit 115 receives the transmission light from the fuse 100 and retransmits the simulated reflection signal generated based on the received signal by the signal processing unit 150 to the receiving unit of the fuse 100. Perform.

The laser light signal received by the receiver 120 is processed by the signal processor 150 and transmitted again toward the fuse 100 through the transmitter 130 after a time delay corresponding to the target sensing distance of the fuse 100.

The transmitter 130 is preferably configured using a GaAs (gallium arsenide) laser diode (LD). In general, the driving of the laser diode LD requires a very short pulse voltage to be applied to the laser diode LD. In order to realize the laser diode LD, a capacitor is charged and then discharged.

In this case, the method of charging the capacitor includes a method of using a charging inductor, a method of using a transistor, and a method of using a dedicated power supply device. The use of a charging inductor or a power supply is mainly used when the circuit is relatively complicated and the charging time of each channel is the same or similar, and the charging method by the transistor is used in a relatively wide range of laser driving circuits. In the transmission circuit of the operation checking apparatus according to the present invention, since the transmission time point is different for each channel due to the characteristics of the control device, the method using the latter method, which is relatively simple in circuit configuration, was selected.

3 is a circuit diagram showing an example of the driving circuit of the laser diode described above as an embodiment of the present invention.

This circuit is a charging circuit that charges the capacitor Cs to two stages of the first transistor Q 1 and the second transistor Q 2. When the trigger signal is applied to the gate of the silicon controlled rectifier (SCR) through the oscillation and trigger circuit, the laser diode LD is driven.

At this time, the base current of the second transistor Q 2 is set below the holding current of the SCR so that the SCR is turned off when the discharge is completed.

The diodes (D 1, D 2, D 3) are connected in parallel to reduce dynamic impedance.

At this time, the capacitor (Cs) is a part that plays an important role of the charging and discharging functions, and should be used to select a capacitor having a small inductance component and equivalent series resistance component and excellent frequency characteristics.

The receiver 120 of the operation checking apparatus according to the present invention receives the laser light transmitted from the fuse 100 through the check well 110, converts the laser light into an electrical signal, amplifies it, and then processes the signal level in the signal processor 150. Converted to and transmitted to the signal processor 150.

4 is a circuit diagram showing an example of a circuit configuration of the receiver 120 according to the present invention.

This circuit includes an amplifier circuit section 122 constructed using the photodetector element LD 1 and two operational amplifiers U 1 and U 2, a comparator circuit section 124 for converting an analog signal into a digital signal, and transmission of fuses. And a peak value detection circuit section 126 for checking the peak value of the pulse.

The peak detection circuit unit 126 including two integrated circuits U 4 and U 5 is a high-speed peak value detection circuit designed to detect a signal peak value having a maximum size of +150 V of a pulse width of 120 ns pulses. This circuit is a signal for checking the transmission output of the fuse by converting the value of the fuse's transmission output into an analog signal, and the fuse should detect the peak value of the transmission optical pulse (approx. 120 ns) signal, and the detected peak value. It shall be maintained until the next fuse transmission signal is input.

The peak value detection circuit is a circuit for reducing the probability of a malfunction by detecting or subtracting the threshold voltage of the comparator by detecting a magnitude of a signal that is scattered and scattered while colliding with a rain or a cloud by the transmitter 130.

5 is a configuration diagram illustrating a digital signal processing circuit in the signal processing unit 150.

The signal processor 150 controls each part of the apparatus, performs various inspection operations according to the user's operation contents, collects various results obtained when the inspection is performed, and determines passing and rejection according to the set criteria. It is a circuit part.

The comparator circuit converts the logic signal into a logic signal capable of digital signal processing only when the output signal of the amplifier circuit is larger than the set threshold level.

The effective signal discrimination circuit is a circuit that selects only the signal having a high probability of being a true signal because a true signal and a noise signal exist together in the output signal of the comparator.

The true signal determination circuit is a circuit for determining the presence or absence of a target by examining how dense the valid signals among the received signals are with respect to the number of transmission signals for a predetermined time.

The delay and ignition circuit outputs the ignition output after the delay time by the signal output from the decision circuit and the delay signal received from the fire control system. When the shock signal or the detonation signal is received, the ignition output is output without the time delay.

Hereinafter, the fuse 100 using the operation check apparatus according to the present invention will be described in a check procedure schematically.

First of all, connect the test cable (117) with the power off. At this time, the method of mounting the inspection cable 117 varies depending on the type of inspection. That is, in the case of self inspection, connect the inspection cable 117 to the connector for self inspection attached to the inspection well 110 cover, and when the fuse is checked, the fuse 100 is placed in the inspection well cover to the connector of the fuse 100. Connect the inspection cable (117).

Close the check well 110 and apply power.

Perform the preliminary check first by turning on the check start key. If a defect is found during the operation, the defect area and an indication message are displayed on the display. Check the fault indicated and turn off the power and take action.

When the preliminary inspection is complete, place the check selection switch on the self inspection or fuse inspection and turn on the inspection start switch.

If a failed item occurs during the check, the fail lamp lights up and the corresponding message appears on the display.

At this time, if you want to continue the inspection, you can continue the inspection by pressing the Continue Inspection key. However, the end result is a failure.

To carry out the fuse check after self-check, it is necessary to open the inspection well cover and change the cable so that the power is turned off and ready.

By the above-described configuration and its operation, the present invention is to check the wiring state of the optical proximity fuse, the program check of the fuse and inspection device, the safety state check of the fuse, the transmission output check of the fuse, the signal processing algorithm check, the detonation output check, The self-destructive check and the variable voltage check can be easily performed, and the inspection result is displayed by driving the lamp, thereby achieving the effect of shortening the inspection time and making accurate inspection.

While the invention has been shown and described with respect to certain preferred embodiments, it will be appreciated that the invention can be modified and modified in various ways without departing from the spirit or scope of the invention as set forth in the claims below. One of ordinary skill in the art will readily know.

Claims (3)

An apparatus for checking the normal operation of an optical proximity fuse that transmits a laser beam, receives a signal reflected by a target, detects a distance from the target, and generates an explosion signal according to a predetermined condition. A check well 110 for mounting and transmitting laser light between the fuse 100 and the check device 100; A receiver 120 which receives the laser light received from the check well 110, converts the laser light into an electrical signal, and amplifies it; For controlling the operation of the inspection apparatus according to the processing of the signal input through the receiver 120, the output of the reflected signal through the transmitter 130, the check of the detonation signal from the fuse 100, and the user's input operation A signal processor 150; A transmitter 130 for transmitting the reflected signal output from the signal processor 150 to the fuse 100; A front panel indicator and indicator (160) for displaying the operation check result of the fuse (100) and for assisting user input control; And a power supply unit 170 for supplying various kinds of power required for the operation of the fuse 100 and the check apparatus. The method of claim 1, wherein the transmitter 130 comprises: a capacitor (Cs) charging circuit composed of two stages of the first transistor (Q 1) and the second transistor (Q 2); Oscillation and trigger circuitry for applying a trigger signal to the gate of the SCR; And a laser diode (LD). 2. The receiver of claim 1, wherein the receiver 120 comprises: an amplifier circuit unit 122 using a photodetector element LD 1 and two stage operational amplifiers U 1 and U 2; A comparator circuit unit 124 for converting an analog signal into a digital signal; And a peak detection circuit unit (126) for checking the peak value of the transmission pulse of the fuse (100).