JP2009058481A - Vor signal monitoring device and vor signal monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a VOR signal monitoring device and a VOR signal monitoring method thereof capable of monitoring a VOR signal without deteriorating monitoring performance even when the VOR signal from a VOR device other than an observation object is received. <P>SOLUTION: The VOR signal monitoring device mixes a local frequency from a local oscillator 22 into a received VOR signal to perform frequency conversion. The frequency-converted VOR signal is passed through a filter 23 to extract the VOR signal of a frequency component corresponding to radiation frequency of the VOR device 1 as the observation object. A monitor reception part 30 demodulates the extracted VOR signal, and monitors the VOR signal from the VOR device 1 on the basis of the signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a VOR signal monitoring device and a VOR signal monitoring method for monitoring a VOR signal radiated from a VOR device.

  Generally, a VOR device is used as a device for giving direction information from a reference point magnetic north to an aircraft. A VOR signal having a frequency of 108 MHz to 118 MHz is radiated from the antenna of the VOR device. The aircraft receives the VOR signal with the receiver mounted on the aircraft, thereby grasping the direction from the VOR device with respect to the reference point magnetic north at the reception point (see, for example, Patent Document 1).

  By the way, the VOR signal radiated from the VOR device is monitored by a VOR signal monitoring device in order to maintain a stable output. In the conventional VOR signal monitoring device, the received VOR signal is passed through a band limiting filter whose pass band is 108 MHz to 118 MHz, and the obtained signal is monitored.

However, in the conventional VOR signal monitoring device, since the pass band of the band limiting filter is 108 MHz to 118 MHz, in addition to the VOR signal transmitted by the VOR device to be observed, the VOR signal transmitted by another VOR device interferes. There is a risk of receiving as a wave. As a result, the VOR signal monitoring apparatus has a problem that its monitoring performance deteriorates due to the influence of interference waves existing in the vicinity of the VOR signal to be observed.
JP-A-2-24586

  As described above, in the conventional VOR signal monitoring device, the monitoring performance is deteriorated by receiving the VOR signal radiated from the VOR device other than the observation target.

  Therefore, an object of the present invention is to provide a VOR signal monitoring apparatus and a monitoring method thereof capable of monitoring a VOR signal without degrading the monitoring performance even when a VOR signal from other than an observation target is received.

  In order to achieve the above object, the present invention provides a VOR signal monitoring apparatus for monitoring a VOR signal radiated at a predetermined frequency in a VOR frequency band from an observed VOR (VHF Omnidirectional Radio Range) apparatus. A receiving antenna for receiving an incoming radio wave in the band; and tuning detection means for tuning-detecting a VOR signal having a frequency component corresponding to a radiation frequency of the observed VOR device from a reception signal of the receiving antenna; The VOR signal obtained in step 1 is monitored.

  Further, in a VOR signal monitoring method used in a VOR signal monitoring device that monitors a VOR signal radiated at a predetermined frequency within a VOR frequency band from an observed VOR (VHF Omnidirectional Radio Range) device, An incoming radio wave is received, a VOR signal having a frequency component corresponding to the radiation frequency of the observed VOR device is tuned from the received signal, and the VOR signal obtained as a result of the tuned detection is monitored.

  The VOR signal monitoring device and the VOR signal monitoring method configured as described above receive radio waves in the VOR frequency band, and perform tuned detection only on the VOR signal component radiated by the observed VOR device from this received signal. As a result, the influence of the VOR signal radiated from other than the observed VOR device can be reduced.

  As described above, according to the present invention, it is possible to provide a VOR monitor device and a monitoring method thereof that can stably monitor a VOR signal even when a VOR signal from a VOR device other than the observation symmetry is received. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a functional configuration of a VOR signal monitoring apparatus according to an embodiment of the present invention. Although only the VOR device 1 to be observed is shown in FIG. 1, it is assumed that there are VOR devices other than the VOR device 1 around the VOR signal monitoring device. The frequency of the VOR signal radiated by each VOR device is assigned from within the frequency band of 108 MHz to 118 MHz.

  In the VOR signal monitoring device shown in FIG. 1, the VOR signal radiated from each VOR device is received by the monitor receiving antenna 10. The received VOR signal is tuned and detected by the frequency tuning unit 20 and becomes a VOR signal having a frequency component corresponding to the radiation frequency of the VOR device 1. When receiving the VOR signal that has been tuned and detected, the monitor receiving unit 30 performs signal demodulation, and measures the angle θ (azimuth) between the magnetic north in the VOR device 1 and the installation direction of the VOR signal monitoring device based on the signal. . FIG. 2 is a conceptual diagram for explaining how the monitor receiving unit 30 according to the present invention measures an angle θ (azimuth) between the magnetic north in the VOR device 1 and the installation direction of the VOR signal monitoring device.

  In the frequency tuning unit 20, the VOR signal received by the monitor receiving antenna 10 is mixed with the local signal from the local oscillator 22 by the mixer 21 and subjected to frequency conversion. The frequency-converted VOR signal is band-limited by the filter 23 and becomes a VOR signal having a frequency component corresponding to the radiation frequency of the VOR device 1.

  The pass band of the filter 23 is set to a narrow band corresponding to one VOR signal. The local oscillator 22 can generate a local signal having an arbitrary frequency. Therefore, even if the radiation frequency of the VOR device 1 is changed, the VOR signal of the VOR device 1 can be tuned and detected by adjusting the frequency of the local signal.

  As described above, the VOR signal monitoring device in the above-described embodiment frequency-converts the received VOR signal, and extracts only the VOR signal having a frequency corresponding to the radiation frequency of the VOR device 1 from the frequency-converted VOR signal. ing. As a result, it is possible to reduce the influence of the VOR signal existing in the nearby frequency, so that it is possible to suppress the interference wave signal level, and it is possible to reduce the deterioration of the monitoring performance due to the interference wave.

  Accordingly, the VOR device monitoring device having the above configuration can stabilize the monitoring operation of the VOR device 1 because the deterioration of the monitoring performance is reduced, and can contribute to the stable operation of the VOR device 1.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

The block diagram which shows the structure of one Embodiment of the VOR signal monitoring apparatus which concerns on this invention. The conceptual diagram for demonstrating a mode when the monitor receiver which concerns on the said embodiment measures the angle (azimuth | direction) which the magnetic north in a VOR apparatus makes, and the installation direction of a VOR signal monitor apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... VOR apparatus, 10 ... Monitor receiving antenna, 20 ... Frequency tuning part, 21 ... Mixer, 22 ... Local oscillator, 23 ... Filter, 30 ... Monitor receiving part.

Claims (4)

In a VOR signal monitoring device that monitors a VOR signal radiated at a predetermined frequency within a VOR frequency band from an observed VOR (VHF Omnidirectional Radio Range) device,
A receiving antenna that receives incoming radio waves in the VOR frequency band;
Tuned detection means for tuned detection of a VOR signal having a frequency component corresponding to a radiation frequency of the observed VOR device from a received signal of the receiving antenna;
A VOR signal monitoring apparatus for monitoring a VOR signal obtained by the tuning detection means. The tuning detection means includes a signal generation means for generating a local signal having an arbitrary frequency, a frequency conversion means for mixing the local signal with the reception signal of the receiving antenna, and a frequency converted signal by this means. Extraction means for extracting a frequency component corresponding to the VOR radiation frequency from, and performing the tuning detection by adjusting the local signal to a frequency corresponding to the radiation frequency of the observed VOR device. The VOR signal monitoring device according to claim 1. In a VOR signal monitoring method used for a VOR signal monitoring device that monitors a VOR signal radiated at a predetermined frequency within a VOR frequency band from an observed VOR (VHF Omnidirectional Radio Range) device,
Receiving incoming radio waves in the VOR frequency band;
Tuned detection of a VOR signal having a frequency component corresponding to a radiation frequency of the observed VOR device from the received signal;
A VOR signal monitoring method characterized by monitoring a VOR signal obtained as a result of the tuning detection. A frequency signal corresponding to a radiation frequency of the observed VOR device is mixed with the received signal to perform frequency conversion,
4. The VOR signal monitoring method according to claim 3, wherein the tuning detection is performed by extracting a frequency component corresponding to the VOR radiation frequency from the frequency-converted signal.

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