SU883959A1 - Device for magnetic recording of time signals - Google Patents

Description

(54) DEVICE FOR MAGNETIC RECORDING OF SIGNALS The invention relates to the field of instrumentation, namely to the technique of magnetic recording, and can be used in devices for recording time signals on magnetic media. A device for magnetic recording of time signals is known, comprising recording and reproducing means connected in a certain way, an automatic control unit, a time code generator, a decoder and a digital display. This device allows you to provide a reference to the current time when recording and search for previously recorded information during playback 1. However, the lack of operational control of the health of the device, excluding recording and playback on magnetic media, reduces the operational reliability of the device as a whole. It is also known a device for magnetic recording of time signals containing a recording head, a VpSHVI code sensor connected to the selections input: Toipa code pulses and a recording head, a code pulse counter, the first input of which is connected to the first TIME output of the code pulse selector, a code decoder and a switch 2. However, in the case of the absence or failure of the playback means, the possibility of monitoring the health of the time code sensor immediately prior to its use is excluded, which also leads to a decrease in operation In the device reliability. The purpose of the invention is to increase the operational reliability of the device by ensuring the operational control of the health of the time code sensor. The goal is achieved by the fact that the device is equipped with first, second and third counting triggers connected in series and connected to the second output of the code pulse selector, a key of code pulses whose output is connected to the second input of the counter of code pulses, and connected to the output of the last indicator, the outputs of each of the specified counting triggers are connected to the inputs of the code decoder, the outputs of which through a switch are connected to the first input of the key of code pulses, the second

the input of which is connected: with the third output of the selector of code pulses, and the first output of the specified selector is additionally connected to the reset inputs of the first, second and third counting triggers.

The drawing shows a functional diagram of the proposed device.

The device contains a recording head 1, conjugated with magnetic tape 2, a time code sensor 3, the output of which is connected to the input of a selector of code pulses 4, and a recording head 1, a counter of code pulses of 5, the first input of which is connected to the first output of a selector of code pulses 4, connected sequentially and connected to the second output of the selector code pulses counting triggers 6,7 and 8, the key code pulses 9, the output of which is connected to the second input of the counter code pulses 5 connected to the output of the last, "indicator Yu, as well as the decoder code il, the inputs of which are connected to the outputs of each of the specified counting triggers 6,7 and 8, and the outputs through the switch 12 are connected to the first input of the code pulse key 9. The first output of the code pulse counter 4 is additionally connected to the reset inputs counting triggers b, 7 and 8.

The device works as follows.

The time code from the output of the time code sensor 3 is fed to the input of the code pulse selector 4, which separates the tonal code pulses by duration and forms a pulse on this basis. reset, code and service pulses,.

The reset pulse from the first output of the code pulse selector 4 is fed to the reset input of the code pulse counter 5 and the reset inputs of the first, second and third counting triggers 6, 7 and 8, setting them to zero positions. From the outputs of the flip-flops 6, 7 and 8 to the inputs of the decoder code 11 receives zero signals, resulting in the decoder 11 on the first output produces a positive signal, which through the switch 12 installed in the position shown in the drawing, is fed to the first input key code-pulses 9, At the remaining outputs of the decipherto E. 11, zero signals are emitted at this time. To the second input of the key-code pulses 9 from the third output of the selector 4, there are code pulses that pass to the input of the counter of code pulses 5 only if there is a positive signal at the first input of the key 9, which is held until

arrivals from the second output of the selector 4 to the input of the counting trigger b of the service pulse corresponding to the second service tone of the time code received at the input of the selector 4. In this case, the trigger b is activated, and from its output the first input of the decoder 11 receives a positive signal. The second and third inputs of the decoder 11 from the outputs of the flip-flops 7 and 8 still receive zero signals, with the result that the decoder 11 generates a positive signal on the second output and zero signals on the other outputs. Consequently, a positive signal at the first input of the key 9 is held between the first and second service tone pulses fed to the input of the selector 4, resulting in the code pulses 5 from the third output of the selector 4 passing only the code pulses through the key 9 The time code that is displayed on the display 10.

The correctness of issuing the time code in other bits is checked similarly with subsequent sending of the time code and setting switch 12 to the appropriate positions.

The implementation of the proposed invention enables the operative control of the operability of the sensor of the time code of magnetic recording devices in which there are no means of reproduction, which ensures an increase in the operational reliability of such devices and, as a result, an improvement in their economic performance,

Claims (2)

1. U.S. Patent 4,011,586, Cl. 360-61.1977. , 2. USSR author's certificate No. 661597, class C. 11 V 5 / 00.1977 (prototype)