SU64364A1 - Device for correcting artillery firing from an airplane - Google Patents

Description

Device

The present invention relates to a device for correcting artillery firing from an aircraft. In this device, according to the invention, two kinescopes are used in the receiver, in which the pulses, deflecting beams, are caused by the coincidence in the mixer of the signal modulation frequency and the frequency of the local oscillator, due to the coincidence of the transmitter and receiver retarder positions mechanically connected to the tuning capacitor axes.

The invention is illustrated in the drawing, which shows the electrical circuit of the device proposed (Fig. 1 - transmitting part, Fig. 2 - receiving part).

The transmitting part is mounted on the aircraft and contains a frame, a modulating device and a radio transmitter. The receiving part is installed on the ground and contains a radio receiver, demodulator and frame.

On the plane in front of the Letnab there is a frame 1 of the transmitting device, on which the map 2 is fixed. The position of the map on the frame

It is defined by the click 7. On the side of the frame there are two handles 3 and 4 with retreats along the length of the frame. When both pens are moving, any points on the map are detected by the retracts. Handles 3 and 4 are mechanically connected to the axes of flat capacitors 41 and 42. Handle 3 throughout the frame from 0 to 100 divisions rotates the axis of the capacitor 41 of circuit I by 180 °. Handle 4 throughout the frame rotates the axis of the capacitor 42 of the circuit II also by 180 °. Knob 3 changes the frequency of Loop I to 6000 Hertz, from 71,000 to 77,000 Hertz. Knob 4 also changes the frequency of circuit II to 6000 Hertz from 63,000 to 69000 Hertz.

When the power button 6 is pressed, the motor time switch 8 is activated, from which the relay 14 is triggered. Relay 14 switches on circuit I when first triggered and turns on circuit II on the second operation. These two circuits are associated with the circuit of a quartz oscillator 10 with a constant frequency of 100,000 hertz. As a result, the frequency of the oscillations of the generator 9 and the generator 10 for correcting artillery firing 19 May 1940 in NKO for JVi 4890 (321577) Published on February 28 1945 from the aircraft

at the output 11 of the modulating device, when the handle 3 moves from 0 to 100 divisions, it changes to 6000 Hertz - from 23,000 to 29,000 Hertz, and when the handle 4 moves, the frequency changes from 31,000 to 37,000 Hertz, i.e. also to 6000 hertz.

After installing the retreat lines on point A, the power button 6 is pressed. The order of sending a signal containing the coordinates of point A is as follows: the time relay 8 and the relay 13 are activated by pressing the button and the transmitter 12 is switched on the source frequency source and then, according to the time relay graph , the first is the modulation frequency of knob 3, and then the modulation frequency of knob 4. After that, the carrier frequency of the transmitter is turned off, and button 6 is unlocked.

The schedule can be made by anyone. For example, take a timeout period of 1 second with sending a two-clock modulated signal for 0.6 seconds. In general, it is possible to send both frequencies simultaneously for both coordinates simultaneously, but then it will be necessary to complicate the modulator circuit by using two independently operating generators with a common output. There is no time relay.

At the receiving device, the signal received by the radio receiver 15, after detection, consists, respectively, of two ultrasonic frequencies following one after the other. These frequencies are fed to the input circuits F1 and OP, which are filters. The input circuit F1 is tuned to the frequency band of knob 3, i.e. from 23000 to 29000 hertz, and the input circuit of the AF is tuned to the frequency band of knob 4, i.e. from 31000 to 37000 hertz. The passage of both frequencies I and II of the signal clock through the demodulator is the same, therefore the passage of only one frequency I of the clock is considered. If the viewfinder of knob 3 on the transmitting device is on the 50th division of the scale, then the frequency of the first clock cycle I will be sent from the transmitter will be equal to 26000 hertz. This frequency from the receiver through the input circuit F1 enters the mixing circuit Ci. The mixing circuit CI is also supplied to a variable frequency from a local oscillator P with a frequency band of 71000-77000 hertz (according to variable circuit I. transmitting device).

At the moment of applying a frequency equal to 74000 hertz, which will be 90 turns of the axis of the capacitor 31, an intermediate frequency is formed in the mixing circuit CI, equal to 100000 hertz. At this frequency on; An intermediate frequency amplifier U1 and a quartz filter KF1 are built. The output amplifier VU1 from the quartz filter KF1 uses the top of the resonance characteristic with a bandwidth of 10 Hertz to produce a current pulse, which, after appropriate amplification and cutting, is fed to an oscillating roller K-tube Ki. 1accordantly at the moment of coincidence of the frequencies of the alternating generator of the transmitting device and the variable generator of the receiving device, i.e. when the degree positions of the axes of the discharge capacitors of these circuits coincide, an impulse will be applied to the deflecting coil for the sighting deflection of the scanning beam Pi of the KI tube.

For; 1 sweep of the K1 tube, the normal sweep pattern with a blocking generator is taken. The sweep is synchronized from the winding 25 located at the axis of the capacitor of the generator rotating at 4U rev / sec. The sweep of the ray tube KI, equal to the length of the frame, will correspond to the rotation of the capacitor 31 from 0 to 180 °. A further stroke of the capacitor from 180 to 360 ° is accompanied by the closure of the contacts25. Passing the second clock cycle through the demodulator is similar to the first clock cycle. As a result, there is the same retrometer deviation of the sweep of the beam of the KN tube. The second beat of the signal comes through the input ..

Noah contour of the OP, on the mixer SI. Participants include the generator GP, or the frequency of the TC, quartz filter KFI and the KII tube with a scan. Both KI and KI kinescopes have a fluorescent layer of delayed luminescence -10 sec., Which allows, on the one hand, to reduce the transmission time from the aircraft signal to approximately 0.1 sec. and, on the other hand, to have sufficient time for the operator to determine the received coordinates. The retreats of the beam of both kinescopes are fed to the retreators of both handles. The intersection point of both receivers on the receiving frame B will correspond to the intersection point of the retreators on the frame of the transmitting device.

The device provides for the rotation of maps of different scales. For example, in the beginning, a small scale map is applied for general adjustment, and then transferred to a large scale map by replacing in flight maps on the frame. In this case, you can adjust the fire with great accuracy. The change of cards is made after receiving orders from the aircraft. The transmission of orders is carried out by applying code marks based on the transmission of two signals with retro-ray deviation from the ray of one coordinate. For example, an order to change the map will consist of two deviations of the beam in the horizontal coordinate by 20 and 25 °. The whole system is based on the identity of the calibration of sputum capacitors 41, 31 and 42, 51. It is not difficult to achieve this at present. In addition, the frequency deviation of the circuits under the influence of temperature or other causes is easily compensated in the receiving device when receiving a correction signal. The correction signal is transmitted at certain intervals and contains the coordinates of a certain point on the map. The operator, in the case of the retreat of the beam from the given coordinate, corrects the development of the kinescope. In general, if required, it is possible to automate the transmission of a correction signal between signals transmitting the combat coordinates of a point. The frequency selection used in the system (input circuit, quartz filter) and amplitude selection (output amplifier) makes it possible to eliminate the effect of interference.

Subject invention

A device for correcting artillery firing from an airplane, characterized by using two kinescopes in the receiver, in which the pulses, deflecting beams, are caused by the coincidence of signal modulation frequency and local generator frequency in the mixer, due to the coincidence of the transmitter and receiver retarder positions mechanically connected to the axes of the capacitors settings.