KR19980051286A - Comparator circuit tester of optical proximity fuse - Google Patents

Abstract

The present invention relates to a device for checking the operation of an optical proximity fuse, and more particularly, in an optical proximity fuse composed of a target detection device and a safety loading device, the normal operation of a comparator circuit constituting a receiver in the target detection device. It is about a device for testing.

The present invention provides a peak value signal generation circuit unit including an operational amplifier for generating a constant peak value by changing the resistance value of the variable resistor, an oscillation circuit for outputting a signal at a predetermined frequency, according to the oscillation frequency of the oscillation circuit. A multi-vibrator circuit for outputting a pulse having a predetermined width, a buffer amplifier circuit for stabilizing an output waveform of the multi-vibrator circuit, a variable resistor connected to an input terminal and connected in series with the variable resistor to connect or disconnect each variable resistor An effective value signal generation circuit unit including a voltage output operational amplifier having an input unit through a switch for switching, and a mode signal generation circuit unit for outputting a pulse signal having a predetermined width when the user turns on the switch according to a predetermined condition. Comparator circuit of optical proximity fuse, characterized in that By providing a test device, the time taken to check the performance of the test of the optical proximity fuze, and is achieved an effect that allows the efficient testing.

Description

Comparator circuit tester of optical proximity fuse

The present invention relates to a device for checking the operation of an optical proximity fuse, and more particularly, in an optical proximity fuse composed of a target detection device and a safety loading device, the normal operation of a comparator circuit constituting a receiver in the target detection device. It is about a device for testing.

A fuse is a device that causes the initial process of the explosive chain to ignite and explode the explosives of the explosive device.

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.

Proximity fuses are provided with electronic devices having the functions of transmitting and receiving in their fuses, transmitting radio waves through these transmission devices, and receiving signals reflected by targets through the receiving device, thus providing an optimum approach distance. Means a fuse with the ability to actuate the detonator.

Such proximity fuse uses the operation principle of transmission and reception, that is, continuous wave Doppler effect, frequency modulation, pulse radar and pulse Doppler.

The optical proximity fuse, which is the object of the present invention, transmits laser light through an optical transmission device, receives the transmitted laser light reflected from the target, and processes the received signal to act as soon as an optimum approach distance is detected. .

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

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

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

The receiving unit 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 reception that determines the reception signal detection area in the photo detector. It consists of an optical device.

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 generates power (+ 15V, -15V, + 5V, + 70V) required for each part of the target detection device.

The circuit of the digital signal processing according to the above-described comparator reference voltage setting method and the true signal discrimination algorithm performed by the signal processor will be described in detail as follows.

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

The effective value conversion circuit plays a role of varying the reference voltage of the comparator by adapting to the change of noise in order to reduce the probability of malfunction due to optical noise.

The peak signal detection circuit is a circuit for reducing the probability of a malfunction by sensing the magnitude of a signal that is scattered as the transmission signal radiated from the transmitter collides with a rain or a cloud and enters the receiver.

Since the comparator circuit described above is formed of a circuit including an integrated circuit, a large number of personnel and time are required to test the characteristics and normal operation of the circuit. It has troubles such as connecting circuits.

It is an object of the present invention to provide a check device for checking the function and electrical characteristics of the comparator circuit of the optical proximity fuse described above so that the user can easily check whether the fuse is normally operating.

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

Figure 2 is a block diagram showing the configuration of connecting the comparator circuit test apparatus of the present invention and the comparator circuit of the optical proximity fuse;

3 is a circuit diagram showing an example of the configuration of a comparator circuit test apparatus according to the present invention;

3A is a circuit diagram of a peak value generating circuit portion;

3B is a circuit diagram of an effective value generation circuit unit;

3C is a circuit diagram of a mode signal generation circuit unit.

* Explanation of symbols for main parts of the drawings

100: peak value signal generating circuit portion 200: effective value signal generating circuit portion

300: mode signal generator circuit 210: oscillation circuit

220: multivibrator circuit 230: buffer amplifier circuit

VR l, 2,3,4: Variable resistor for peak value adjustment

SW 1,2,3,4: Switch D 1: Diode

TR 1: Amplification Transistor

In order to achieve the above object, the present invention, a peak value signal generation circuit unit including an operational amplifier for generating a constant peak value by changing the resistance value of the variable resistor, an oscillator circuit for outputting a signal at a predetermined frequency, the A multivibrator circuit for outputting a pulse having a predetermined width according to the oscillation frequency of the oscillation circuit, a buffer amplifier circuit for stabilizing an output waveform of the multivibrator circuit, a variable resistor connected to an input terminal and a variable resistor connected in series with each other An effective value signal generation circuit unit including a voltage output operational amplifier having an input unit through a switch for connecting or disconnecting a variable resistor, and a mode for outputting a pulse signal having a predetermined width when the user turns on the switch according to a predetermined condition. Characterized in that it comprises a signal generating circuit portion Learning-up provides the test apparatus the comparator circuit of the fuze.

EXAMPLE

Referring to the accompanying drawings, a preferred embodiment of the present invention will be described.

2 is a block diagram showing the configuration of connecting a comparator circuit test apparatus of the present invention and a comparator circuit of an optical proximity fuse.

Figure 3 is a circuit diagram showing an example of the configuration of a comparator circuit test apparatus according to the present invention, Figure 3a is a circuit diagram of the peak value signal generation circuit portion according to the present invention, Figure 3b is an effective value signal generation circuit according to the present invention and the effective Fig. 2C is a circuit diagram of the mode signal generation circuit section according to the present invention.

The peak value signal generator of the present invention includes an operational amplifier (IC 1), a resistor (R 1) and a variable resistor (VR 1) for adjusting the input voltage of the input terminal of the operational amplifier.

When the variable resistor of the variable resistor VR 1 of the peak value signal generator is adjusted, an output signal having a constant peak value is generated at the output terminal thereof. As an example of this peak value, a 2V peak value signal is output through the output terminal.

The effective value signal generator of the present invention and a buffer circuit for voltage adjustment and buffer amplification of the output from the effective value signal generator include timing signal generating means (IC 2), multivibrator means (IC 3), and transistor (TR 1) amplification. An effective value output circuit section including a circuit, a buffer circuit IC 4, and an operational amplifier IC 5 for setting a desired effective value level.

The timing signal generating means IC 2 can be configured using an integrated circuit in which a square wave oscillation circuit is incorporated. FIG. 2B shows an example in which the 555 IC including the oscillation circuit is used as an embodiment.

This oscillation circuit oscillates as a time constant by the resistor Ra a resistor R b and the capacitor C 1, and the frequency at this time is determined by f = (Ra + Rb) × (C 1).

The multivibrator circuit receives the frequency signal f generated by the oscillator circuit and generates and outputs a signal having a desired pulse width.

The pulse width at this time is determined by adjusting the values of the resistor R x and the capacitor C x.

This pulse width is determined by tau = 0.7 x (R x) x (C x). As an example of such a pulse width, a signal having a pulse width of 200 s is output.

This output signal is amplified via the transistor TR 1 and its output is inverted and input to the buffer circuit.

Here, as an embodiment of the present invention, the RMS signal generating circuit unit 200 is provided between the buffer amplifier circuit 230 and the voltage output operational amplifier IC 5 to attenuate the undershoot and oscillation of the square wave signal. It may also be configured to further include a diode (D 1).

The operational amplifier IC 5 of the output stage acts as an inverting circuit and is responsible for adjusting the magnitude of the effective value signal output. The operational amplifier (IC 5) has three switches (SW 1) connected in series to three variable resistors (VR 2, VR 3, VR 4) and respective variable resistors (VR 2, VR 3, VR 4) at its input. , SW 2, SW 3) are connected.

When one of the three switches SW 1, SW 2, and SW 3 is connected, the connected variable resistor of the switch is connected to the input of the operational amplifier IC 5 to obtain a predetermined effective value output. As an example of this invention, the output value corresponding to each said switch outputs the effective value of 2Vp-p, 4Vp-p, and 8Vp-p.

3c is a circuit diagram of a mode signal generator according to the present invention.

This circuit comprises a switch SW 4, an inverting circuit and a multivibrator IC 6.

When the fuse is flying low, the ignition signal may be applied to the fuse due to the infrared wavelength reflected by the ground, so that the mode signal is output to set the comparator reference voltage higher, thereby preventing the fuse from malfunctioning. It performs the function.

This circuit is a switch for simulating rain and cloud conditions. When the switch is turned on, a negative signal is input to an inverter integrated circuit. This signal is converted into a positive signal through an inverter integrated circuit and input to the multivibrator, which outputs a single pulse in accordance with the input signal.

At this time, the pulse width is determined by adjusting the values of the resistor R m and the capacitor C m. This pulse width is determined by τ = 0.7 × (R m) × (C m). As an example of such a pulse width, a signal having a pulse width of about 700 mu s is output as a single pulse.

The operation in the case of testing the comparator circuit of the optical fuse using the test apparatus of the present invention having the above-described configuration is as follows.

The inspection of the fuse begins by connecting the fuse to the apparatus. The device is equipped with four optics that are responsible for the optical interface with the fuse, and the electrical interface is via a check cable.

Through this cable, various commands are applied to the fuse to check the application of the optical signal and the reaction during the operation of the fuse. The optical part of the inspection equipment is used, while the electrical check is confirmed through the connector of the fuse.

By the above-described configuration and its operation, the present invention provides a device capable of testing the normal operation of the comparator circuit of the optical proximity fuse, thereby reducing the time required for testing the performance of the optical proximity fuse and enabling efficient testing. Effect is achieved.

While the invention has been shown and described with reference to certain preferred embodiments, it will be understood that the invention can be variously modified and modified without departing from the spirit or scope of the invention as set forth in the claims below Those skilled in the art can easily know that.

Claims (2)

Peak value signal generation circuit unit 100 including an operational amplifier IC 1 for generating a constant peak value by changing the resistance value of the variable resistor VR 1, and an oscillation circuit 210 for outputting a signal at a predetermined frequency. ), A multi-vibrator circuit 220 for outputting a pulse of a predetermined width according to the oscillation frequency of the oscillation circuit, a buffer amplifier circuit 230 for stabilizing the output waveform of the multi-vibrator circuit 220, variable connected to the input terminal Switch (SW 1, SW2, SW 3) connected in series with resistors (VR 2, VR 3, VR 4) and this potentiometer (VR 2, VR 3, VR 4) to connect or disconnect each potentiometer. An effective value signal generation circuit unit 200 including a voltage output operational amplifier IC 5 having an input unit through the output unit, and outputting a pulse signal having a predetermined width when the user turns on the switch SW 4 according to a predetermined condition. Mode signal generation circuit unit 300 for Optical proximity fuse of the comparator circuit testing apparatus characterized in that should be configured. 2. The diode D 1 of claim 1, wherein the RMS signal generating circuit unit 200 is configured between the buffer amplifier circuit 230 and the voltage output operational amplifier IC 5 to reduce undershoot and oscillation of the square wave signal. Comparator circuit test apparatus of an optical proximity fuse further comprises a).