JPS6339658Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention displays the difference in rotational angle information between the two systems of angle signal generators in a device such as a radar device that is equipped with two systems of angle signal generators that indicate the direction of an antenna beam. The present invention relates to an angle difference display device.

Conventionally, in an azimuth angle signal circuit representing the antenna beam direction of a radar device or the like, a reference signal and an incremental pulse signal obtained from a specific rotational direction of the antenna are received from the antenna device, and the difference angle between the antenna beam direction and the reference signal is corrected. It's running electrically.

FIG. 1 shows an example of a device equipped with two systems of angle signal generators using this type of angle correction method. Reference numerals 1 and 2 in the figure are angle signal generators that are directly connected to the antenna rotation axis and generate reference signals 5 and 7 and incremental pulse signals 6 and 8 obtained from a specific rotation direction of the antenna. Reference numerals 3 and 4 in the figure are angle correctors that receive signals 5, 6 and 7, 8 from the angle signal generator and correct the angle of the difference between the antenna beam direction and the reference signal. Reference numeral 11 denotes a working/standby switching device, which has the function of selecting which of the two systems of angle signal generators to use.

In a device equipped with two systems of angle signal generators using this type of angle corrector, the amount of correction for the reference signal from the antenna is corrected by the angle corrector of each system. The direction of generation does not need to be the same for the working system and backup system. However, the angle of the reference signal 9 corrected by this angle corrector is corrected so that it is generated once when the antenna beam is directed in the magnetization direction, and the difference in the generation time of the reference signals 9 and 10 is due to the angle error of the radar device. It is well known that it is necessary to set the value within an allowable range. For this reason, the reference signals 9 and 10 of both systems are observed with an oscilloscope, etc., and the angle is corrected using a standby system angle corrector so that the time difference between the standby system reference signal and the working system reference signal is within an allowable range. in one revolution
This measurement is difficult in cases such as air route monitoring radar equipment, which requires 10 seconds.

The present invention solves the above-mentioned problems by calculating the time difference between the working system reference signal and the standby system reference signal by counting the number of pulses of the incremental pulse signal, and thereby displaying the angle difference information along with the + and - polarity displays. This is what we provide.

That is, the present invention obtains a reference signal from two systems of angle signal generators and an incremental pulse signal from one of the angle signal generators,
This angular difference display device aims to measure the number of pulses between two reference signals using this incremental pulse signal, and display the measurement results as angular difference information along with + and - polarity displays.

Next, an embodiment of the present invention will be described with reference to FIG.

In FIG. 2, reference signals 21 and 23 from two systems of angle signal generators and one system of incremental pulse signals 22 are input.

The timing adjustment circuit 24 uses the reference signals 21 and 23
The function of synchronizing the incremental pulse signal 22 with the reference signal that determines the start of the short-time difference among the long-time differences between the reference signals 21 and 23 allows the count clear signal to the counter circuit 25 and the period A counting result latch signal to the latch circuit 26 is generated by a reference signal that determines the end of the count result, and a reference signal-to-pulse counting gate that determines the end is generated from the reference signal that determines the start and is supplied to the counter circuit 25. When counting is started from the reference signal 21, a + polarity display signal is sent to the display circuit 27, and when counting is started from the reference signal 23, a - polarity display signal is sent to the display circuit 27. Of course, it is also possible to use a circuit in which the polarity indications + and - are reversed.

After the counter circuit 25 clears the counting circuit by the count clear signal from the timing adjustment circuit 24, it counts incremental pulse signals and sends them to the latch circuit 26 while the pulse counting gate signal is supplied. The latch circuit 26 is the counter circuit 2
Timing adjustment circuit 24 receives the counting results from 5.
The counting results are held and sent to the display circuit 27 by a latch signal from the latching signal. Display circuit 27 is latch circuit 2
6 and a polarity display signal from the timing adjustment circuit 24 to perform counting display and +/- polarity display.

By configuring the circuit as described above, the present invention can display the difference in generation time of the reference signal of the standby angle signal generator with respect to the reference signal of the active angle signal generator. The difference in rotational angle information between the angle signal generators is known, which has the effect of facilitating correction work by the angle correction circuit.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing in block diagram form an embodiment of a device equipped with two systems of angle signal generators using the angle correction method, and Fig. 2 is a circuit diagram showing in block diagram form an embodiment of the present invention. be. 21... Reference signal from the working system angle signal generator, 22... Incremental pulse signal from the angle signal generating device of either the working system or the standby system, 23... Reference signal from the standby system angle signal generating device, 24...timing adjustment circuit, 2
5...Counter circuit, 26...Latch circuit, 27
...display circuit.

Claims (1)

[Scope of utility model registration request] Measurement is started from a reference signal obtained from a specific rotational direction of a mechanically rotating antenna, or from a reference signal after a fixed angular correction based on this reference signal, and incremental pulses obtained at fixed angular intervals. In a device equipped with two systems of angle signal generators that obtain mechanical rotation angle information of the antenna by counting signals, the angles of the two systems are generated because the direction of reference signal generation differs for each system. An angle difference display device characterized in that the rotation angle information difference between the signal generators is displayed by counting the number of pulses between the two systems of reference signals to display the angle difference information together with + and - polarity display.