KR19990034271A - Receiving System of Wireless Pole Testing Equipment - Google Patents

Abstract

The present invention provides a reception system of a wireless pole test apparatus for simulating the transmission and reception of shell fuses.

The present invention provides a reception antenna for receiving an RF signal from an RF signal transmission system; A first lowpass filter for selecting a signal having a frequency band of the center frequency fc among various signals in free space; A first AGC amplifier for uniformly amplifying the FM signal having the fc center frequency passed through the first low pass filter; A first FM demodulator for demodulating the center frequency fc; An amplifier for amplifying the demodulated weak signal; A splitter for splitting the demodulated fc signal into two signals; A second bandpass filter for selecting a frequency band of the center frequency f1 from the two divided signals; A third bandpass filter for selecting a frequency band of a center frequency f2 from the divided two signals; A second AGC amplifier for amplifying the f1 signal passing through the second bandpass filter with a constant amplitude; A third AGC amplifier for uniformly amplifying the f2 signal passing through the third bandpass filter; A second FM demodulator for demodulating the center frequency f1; A third FM demodulator for demodulating the center frequency f2; A first audio signal amplifier for amplifying the audio signal at the output of the second FM demodulator to obtain a desired Doppler signal; And a second audio signal amplifier which amplifies an audio signal of the output of the third FM demodulator and obtains a desired detection voltage.

According to the reception system of the wireless pole test apparatus of the present invention, the installation is simple, is not affected by the movement of the measuring cable, there is no induction of power noise by the measuring cable, and there is no loss of signal by the cable. The effect that can realize the test apparatus can be obtained.

Description

Receiving System of Wireless Pole Testing Equipment

The present invention relates to a reception system of a wireless pole test apparatus, and more particularly to a reception system of a wireless pole test apparatus for simulating the transmission and reception of shell fuses.

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.

All fuses shall have four functions: safety, loading, sensitivity and explosion. In the view of safety, the fuse shall be designed so that it does not work before the required time. It must also be safe during storage, loading, shipping, handling and launching.

The fuse is the second function and must be loaded at the appropriate time after firing. This may be achieved by appropriate use of natural phenomena that occur while the launching shell is leaping.

The fuse should also have the ability to detect the location of the target. In order to achieve this final purpose, it is possible to make contact with the target, to approach the target, to measure a scheduled jump time from launch or to measure the characteristics of the trajectory indicating the presence of the target.

As the last function of the fuse, the fuse should explode at a given time for optimum effect.

On the other hand, if the fuse of the shell is classified according to its function or function, it can be classified into an impact fuse, time fuse, peripheral fuse, proximity fuse, and command fuse.

Proximity fuse refers to a fuse having a function of having an electronic device having a transmission function and a reception function in the fuse to receive a signal reflected from a target, and to operate the detonator at an optimum approach distance.

This fuse is supposed to act upon receipt of the reflected radio wave at the optimum approach distance of the radio wave reflected from the target. Proximity fuses use the principle of operation of transmission and reception: continuous wave Doppler effect, frequency modulation, pulse radar and pulse Doppler.

The apparatus for simulating the transmission and reception of the fuse is a pole test apparatus, the configuration of which is shown in FIG.

As shown in FIG. 1, the pole test apparatus 10 includes a test pole 11, a pulley 12 attached to the pole 11, a rope 14 connecting the control motor 21, and a vehicle ( 15) a body 16, a support rope 13 for supporting the vehicle 15 and the body 16, a measurement cable 17 connected to the body 16, and a cable support pole for supporting the measurement cable; 18, the measuring device 19 connected to the cable, and the power supply unit 20.

The test method of the transmission and reception of the pole test apparatus is a wired method, and receives a Doppler signal transmitted from a detector of the carbon body 16 through a measuring cable 17 consisting of a Doppler wire, a power line, and a ground wire. This is done by analyzing the transmission and reception signals.

In the above configuration, the vehicle 15 serves to support the body and the control motor 21 controls the position of the body 15. The power supply supplies 24 VDC.

However, in the pole test apparatus, since the measurement cable 17 includes all of the Doppler wire, the power wire, and the ground wire, the test cable 17 serves as an antenna, and test conditions vary according to the state of the measurement cable 17. You lose. In other words, if the movement of the measuring cable affects the Doppler signal and the wind is severe, the situation can not be measured.

In addition, since the length of the measuring cable 17 is long, there is a problem that the loss of the signal in the measuring cable is large.

In addition, the installation of the pole test apparatus takes a lot of time, since the Doppler wire, the power line, and the ground wire are all included in the measurement cable 17, there is a problem that power noise is largely induced by the measurement cable.

Therefore, the present invention has been made to solve the above problems, the measurement cable is composed of only the power line so that the pole tester is not affected by the measurement cable, and the signal from the measurement cable is not lost, It is an object of the present invention to provide a receiving system for a wireless pole test apparatus without inducing power noise by a measuring cable.

1 is a block diagram of a pole test apparatus of the prior art,

2 is a block diagram of a wireless pole test apparatus of the present invention,

Figure 3 is a block diagram of a receiving system of the wireless pole test apparatus of FIG.

<Explanation of symbols for main parts of the drawings>

10: pole test apparatus 11: test pole

12: pulley 13: rope

14: support rope 15: vehicle

16: bullet body 17: measuring cable

18: cable support pole 19: measuring equipment

20: power supply 21: control motor

31: reception antenna 32: first bandpass filter

33: first AGC amplifier 34: first FM demodulator

35 amplifier 36 splitter

37: second bandpass filter 38: second AGC amplifier

39: second FM demodulator 40: first audio signal amplifier

41: third bandpass filter 42: third AGC amplifier

43: third FM demodulator 44: second audio signal amplifier

In order to achieve the above object, the present invention provides a test pole, a pulley attached to the pole, a rope connecting a control motor, a vehicle, a body, a support rope for supporting the vehicle and the body, a cable connected to the body, the A wireless pole test apparatus comprising a cable support pole for supporting a cable, a measuring device connected to the cable, and a power supply, comprising: a receiving antenna for receiving an RF signal from an RF signal transmission system; A first lowpass filter for selecting a signal having a frequency band of the center frequency fc among various signals in free space; A first AGC amplifier for uniformly amplifying the FM signal having the fc center frequency passed through the first low pass filter; A first FM demodulator for demodulating the center frequency fc; An amplifier for amplifying the demodulated weak signal; A splitter for splitting the demodulated fc signal into two signals; A second bandpass filter for selecting a frequency band of the center frequency f1 from the two divided signals; A third bandpass filter for selecting a frequency band of a center frequency f2 from the divided two signals; A second AGC amplifier for amplifying the f1 signal passing through the second bandpass filter with a constant amplitude; A third AGC amplifier for uniformly amplifying the f2 signal passing through the third bandpass filter; A second FM demodulator for demodulating the center frequency f1; A third FM demodulator for demodulating the center frequency f2; A first audio signal amplifier for amplifying the audio signal at the output of the second FM demodulator to obtain a desired Doppler signal; And a second audio signal amplifier which amplifies an audio signal of the output of the third FM demodulator and obtains a desired detection voltage.

In the receiving system, the center frequency f1 selected from the second bandpass filter and the center frequency f2 selected from the third bandpass filter have a low frequency lower than the center frequency fc selected from the first bandpass filter. It is characterized by having.

Hereinafter, a transmission system of a wireless pole test apparatus of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows the configuration of the transmission system of the wireless pole test apparatus of the present invention, as shown, in contrast to the configuration of the conventional pole test apparatus, the test pole 11, attached to the pole 11 Pulley 12, rope 14 for connecting control motor 21, vehicle 15, body 16, support rope 13 for supporting vehicle 15 and body 16, and the body ( The configuration having the cable 17 connected to the 16, the cable support pole 18 for supporting the cable, the measuring equipment 19 connected to the cable, and the power supply 20 is the same as the configuration of the prior art.

Only the wireless pole test apparatus of the present invention directly transmits the Doppler signal of the transmission system 45 for the wireless transmission of the RF signal, the reception antenna 31 for reception, the reception system 30 and the detector of the tank 16. It is further provided with a connecting line 39 connecting to the system 30.

In addition, in the above configuration, the cable 17 is composed of a pure power cable unlike the prior art including a Doppler wire, a power line, and a ground line.

Therefore, the transmission signal from the carcass 16 is not transmitted to the measurement cable but radiated to the free space by the transmission system 20 and received by the reception antenna 38 to obtain the original signal by the reception system 30. It is delivered to the measuring equipment 19.

3 shows a configuration of a receiving system of a wireless pole test apparatus of the present invention.

As illustrated, the reception system 30 of the wireless pole test apparatus has a reception antenna 31 for receiving an RF signal from the RF signal transmission system 45 and a frequency band of the center frequency fc among various signals in free space. A first low pass filter (32) for selecting a signal, and a first AGC amplifier (33) for constant amplitude amplification of the FM signal having the fc center frequency passed through the first low pass filter (32). A first FM demodulator 34 for demodulating the center frequency fc, an amplifier 35 for amplifying the demodulated weak signal, a splitter 36 for dividing the demodulated fc signal into two signals, A second bandpass filter 37 for selecting a frequency band of the center frequency f1 from the two divided signals, a third bandpass filter 41 for selecting a frequency band of the center frequency f2 from the two divided signals, The second bandpass filter 37 A second AGC amplifier 38 for amplifying the excessive f1 signal with a constant amplitude, a third AGC amplifier 42 for amplifying a constant amplitude of the f2 signal passed through the third bandpass filter 41, A second FM demodulator 29 for demodulating the center frequency f1, a third FM demodulator 43 for demodulating the center frequency f2, and an audio signal of the output of the second FM demodulator A first audio signal amplifier 40 for obtaining a desired Doppler signal, and a second audio signal amplifier 44 for amplifying an audio signal at the output of the third FM demodulator to obtain a desired detection voltage.

According to the operation by the above configuration, the desired frequency band is selected by the first band pass filter 32 for the RF signal transmitted through the transmission system 45, and then the constant amplitude is selected by the AGC amplifier 33. The demodulation for the frequency band fc is then performed in the first FM demodulator 34, and the output of the demodulator is amplified through the amplifier 35, and the signal passing through the amplifier 35 is transmitted to the splitter 36. The frequency center is modulated by the band pass fillers 37 and 41 to demodulate the center frequencies f1 and f2 by the FM demodulators 39 and 43. Oido signal having a frequency is amplified by AGC amplifiers (40, 44) to obtain the original Doppler signal and the detection voltage, so that the reception system of the wireless pole test apparatus which is not affected by loss of transmission and reception signals and external weather. Can be implemented.

According to the reception system of the wireless pole test apparatus of the present invention, the installation is simple, is not affected by the movement of the measuring cable, there is no induction of power noise by the measuring cable, and there is no loss of signal by the cable. The effect that can realize the test apparatus can be obtained.

Although the present invention has been described with reference to one embodiment, the present invention is not limited thereto and may be variously modified and changed by those skilled in the art without departing from the spirit and scope of the appended claims.

Claims (2)

A test pole, a pulley attached to the pole, a rope connecting a control motor, a vehicle, a body, a support rope for supporting the vehicle and the body, a cable connected to the body, a cable support pole for supporting the cable, the cable In the wireless pole test apparatus including the measuring equipment connected to the power supply unit: A reception antenna 31 for receiving an RF signal from the RF signal transmission system; A first low pass filter 32 for selecting a signal having a frequency band of the center frequency fc among various signals in free space; A first AGC amplifier 33 for uniformly amplifying the FM signal having the fc center frequency passed through the first low pass filter 32; A first FM demodulator (34) for demodulating the center frequency fc; An amplifier (35) for amplifying the demodulated weak signal; A splitter 36 for dividing the demodulated fc signal into two signals; A second bandpass filter 37 for selecting a frequency band of the center frequency f1 from the two divided signals; A third bandpass filter (41) for selecting a frequency band of the center frequency f2 from the two divided signals; A second AGC amplifier 38 for uniformly amplifying the f1 signal passing through the second bandpass filter; A third AGC amplifier 42 for uniformly amplifying the f2 signal passing through the third bandpass filter; A second FM demodulator (39) for demodulating the center frequency f1; A third FM demodulator (43) for demodulating the center frequency f2; A first audio signal amplifier (40) for amplifying the audio signal at the output of the second FM demodulator to obtain a desired Doppler signal; And And a second audio signal amplifier (44) which amplifies the audio signal of the output of the third FM demodulator to obtain a desired detection voltage. 2. A center frequency f1 selected by the second bandpass filter 37 and a center frequency f2 selected by the third bandpass filter 41 are determined by the first bandpass filter 32. A reception system of a wireless pole test apparatus, characterized in that it has a lower frequency than the selected center frequency fc.