JP2677314B2 - Radar synchronization signal transmission system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radar synchronization signal transmission system for transmitting a radar signal output from a receiver, and more particularly to a synchronization signal transmission system used for displaying a radar video signal and processing a video signal.

[0002]

2. Description of the Related Art Generally, in order to display a radar signal output from a radar device on a radar display device or to perform signal processing by a computer or the like, which direction is a video signal when a radar antenna is oriented? A radar trigger signal that is a distance reference is required in the display / processing of the angle signal and the video for indicating. These signals are
The same is necessary when transmitting to a remote place via a transmission line.

Conventionally, as the above-mentioned angle signal, an angle signal indicating a reference azimuth and an angle signal indicating an angle change of the azimuth are used.
Different types of angle signals are used. Here, the angle signal indicating the reference azimuth (hereinafter referred to as the reference azimuth angle signal) is usually
Magnetic north is used as the azimuth reference. On the other hand, the angle signal indicating the angle change of the azimuth (hereinafter referred to as the azimuth change angle signal) is repeatedly output for each divided angle by dividing the entire rotation range of the radar into predetermined equal angles. Then, the angle signal is converted into an absolute azimuth on the side receiving these angle signals, that is, the radar display side, and used for displaying the radar video.

The radar trigger signal also serves as a reference for video sweep when displaying video on a display device.

In the conventional method, the angle signal and the radar trigger signal are transmitted as they are as pulse signals through the line in real time and are output as they are at the receiving side.

[0006]

The above-mentioned conventional angle signal and radar trigger transmission is a method of transmitting each pulse signal as it is in real time. Since the signal is used for display, the line disturbance may cause If the pulse signal of the angle signal is lost, the video cannot be displayed in the correct direction. In particular, if the azimuth change angle signal is missed by even one pulse, the full-screen video continues to be displayed in the wrong position until the next reference azimuth angle signal arrives. In addition, there was a problem that the video sweep could not be performed if the radar trigger was missed.

The present invention has been made in order to solve the above-mentioned problems in the conventional example, and the angle signal and the radar trigger signal can be normally reproduced on the receiving side even if the line is disturbed. It is an object to provide a radar synchronization signal transmission system.

[0008]

A radar synchronization signal transmission system according to the present invention uses, on the transmitting side, a cycle and pulse width of a radar trigger signal, a cycle and pulse width of an azimuth change angle signal, and a reference azimuth angle by using a clock. sampled signal having a period and a pulse width, respectively, the period data and the pulse width data of the radar trigger signal, the period data and the pulse width data of the orientation change angle signal, the periodic data and pulse width data of the reference azimuth signal, respectively Each calculating means for calculating and outputting, and data multiplexing means for time-division-multiplexing each of the data and transmitting the data to the receiving side through the line are provided, and the receiving side receives the respective data from the transmitted multiplexed signal. while each separate output, a data separating means for outputting a control signal when receiving separate them each data correctly, Storage means for storing each data respectively output from the data separation means, the period data and the pulse width data of the radar trigger signal based on the control signal, the periodic data and pulse width data of the orientation change angle signal, the reference Counts the clock and each data writing / reading control means that performs control to write the periodic data and the pulse width data of the azimuth angle signal to each storage means when the data is normally received and to read the data from each storage means at regular intervals. And that value is each memory
The radar trigger signal stored in the means, the lateral <br/> level variation angle signal, and the comparing means for generating a pulse each time that is equal to the respective period data of the reference azimuth angle signals, each storage means the stored such that the pulse width equal to the pulse width data of each signal, a pulse generated from the comparing means and each waveform shaping, and outputs the radar trigger signal, orientation change angle signal and the reference azimuth angle signals, respectively Each pulse shaping means is provided. Radar synchronization signal receiver according to the present invention
Is the radar trigger signal cycle data and pulse width data.
Data, pulse direction data and cycle data of direction change angle signal.
Data of the reference azimuth signal and the pulse width data
It is common to separate and output the transmitted multiplexed signals.
In addition, when each of those data is normally received and separated, the control signal
From the data separation means that outputs
Storage means for storing each output data, and
Cycle de chromatography of the radar trigger signal based on the serial control signal
Data and pulse width data, the cycle data of the azimuth change angle signal.
Data and pulse width data, the cycle of the reference azimuth angle signal
Receiving data and pulse width data normally
When you do, write to each storage means, and those at regular intervals
Each data document that controls reading data from each storage means
The read-out control means and the clock are counted, and
The radar trigger in which the value of is stored in each storage means
Signal, the azimuth change angle signal, the reference azimuth angle signal
Generates a pulse when it becomes equal to each period data
Each comparing means to perform and each of the above-mentioned each stored in each storage means
To have a pulse width equal to the pulse width data of the signal,
Each pulse generated from each comparison means is shaped,
Radar trigger signal, azimuth change angle signal and reference azimuth
With each pulse shaping means for outputting each frequency signal
It is characterized by the following.

[0009]

According to the present invention, the radar trigger signal, the azimuth change angle signal and the reference azimuth angle signal, each period data and the pulse width data are multiplexed and transmitted on the transmitting side.
On the reception side, when this is normally received, it is separated and stored in each storage means, and the stored data is used to reproduce and output the radar trigger signal, the azimuth change angle signal, and the radar synchronization signal of the reference azimuth angle signal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a radar synchronization signal transmission system according to an embodiment of the present invention.

In FIG. 1, configuration numbers 1 to 7 are configurations on the transmitting side, and 8 to 23 are configurations on the receiving side. On the transmission side, the trigger period calculation means 1 inputs the radar trigger signal output from the radar device, samples the period of the trigger signal with a clock, calculates trigger period data, and outputs the trigger period data.

The trigger pulse width calculation means 2 samples the pulse width of the trigger with a clock to calculate and output the trigger pulse width. These trigger cycle data and trigger pulse width data are used as radar trigger information.

The azimuth change angle signal cycle calculation means 3 samples the cycle of the azimuth change angle signal with a clock to output the azimuth change angle signal cycle data as the azimuth change angle signal cycle data, and also calculates the azimuth change angle signal pulse width. The means 4 samples the pulse width of the azimuth change angle signal with a clock and outputs it as azimuth change angle signal pulse width data.

The azimuth change angle signal period data and the azimuth change angle signal pulse width data are used as the azimuth change angle signal information.

The reference azimuth angle signal cycle calculation means 5 samples the cycle of the reference azimuth angle signal with a clock and outputs it as reference azimuth angle signal cycle data, and also calculates the reference azimuth angle signal pulse width. In the means 6, the pulse width of the reference azimuth angle signal is sampled by the clock and output as the reference azimuth angle signal pulse width data. These are the reference azimuth angle signal cycle
Data and reference azimuth angle signal pulse width data
This is the information of the position angle signal.

The above-mentioned trigger cycle data, trigger pulse width data, azimuth change angle signal cycle data, azimuth change angle signal pulse width data, reference azimuth angle signal cycle data, and reference azimuth angle signal pulse width data are used in the data multiplexing means 7. , Time-division multiplex, and output as transmission data via a line.

On the other hand, on the receiving side, the data separation means 8 uses the transmitted multiplexed signal to generate trigger cycle data, trigger pulse width data, azimuth change angle signal cycle data, azimuth change angle signal pulse width data, and reference azimuth. The angle cycle data and the reference azimuth angle pulse width data are separated and output, and a control signal notifying that the data is normally received / separated is output to the data writing / reading control means 10, 15, 20.

The data writing / reading control means 10 comprises:
When the control signal from the data separation means 8 is input, a write control signal for storing the received trigger cycle data in the trigger cycle storage means 9 is output. Similarly, when the control signal from the data separating means 8 is also input to the trigger pulse width data, the write control signal for storing in the trigger pulse width storing means 11 is output.

The trigger cycle data is temporarily stored in the trigger cycle storage means 9 according to the control signal. Similarly,
The trigger pulse width data is temporarily stored in the trigger pulse width storage means 11 by the control signal. The stored trigger cycle data is output to the comparison unit 12 by a read signal from the data write / read control unit 10.

In the comparison means 12, when the count number of the clock matches the trigger cycle data, a pulse is generated and the pulse is output to the pulse shaping means 13. The pulse shaping means 13 detects the rising edge of the pulse and creates the falling edge of the pulse when the number of clocks is the same as the trigger pulse width data from the rising edge of the pulse, so that the same cycle / pulse width as the radar trigger on the transmitting side is generated. Signal is generated and output as a radar trigger signal. At the same time as outputting the radar trigger signal, the comparison means 1
2. Reset the internal counter of 2.

Further, each time the control signal from the data separation means 8 is received, the data write / read control means 10 is provided.
Inputs the received trigger cycle data to the trigger cycle data storage means 9 and the received trigger pulse width data to the trigger pulse width storage means 11 to update the stored data.

On the other hand, the data write / read control means 1
5 is when the control signal from the data separation means 8 is input,
A write control signal for storing the received azimuth change angle signal cycle data in the azimuth change angle signal cycle data storage means 14 is output. Similarly, when the control signal from the data separating means 8 is input to the azimuth change angle signal pulse width data,
A write control signal to be stored in the azimuth change angle signal pulse width data storage means 16 is output.

The azimuth change angle signal cycle data is stored in the azimuth change angle signal cycle data storage means 1 according to the control signal.
4 is temporarily stored. Similarly, the azimuth change angle signal pulse width data is temporarily stored in the azimuth change angle signal pulse width data storage means 16 by the control signal. The stored azimuth change angle signal cycle data is output to the comparison means 17 by a read signal from the data write / read control means 15.

In the comparison means 17, when the count number of the clock matches the azimuth change angle signal cycle data, a pulse is generated and the pulse is output to the pulse shaping means 18. The pulse shaping means 18 detects the rising edge of the pulse, and creates a trailing edge of the pulse when the same number of clocks as the pulse width data of the azimuth changing angle signal is detected from the rising edge of the pulse, thereby generating the azimuth changing angle signal on the transmitting side. A signal having the same cycle / pulse width is generated and output as an azimuth change angle signal. Simultaneously with the output of the azimuth change angle signal, the internal counter of the comparison means 17 is reset.

Each time the control signal from the data separating means 8 is received, the data writing / reading means 15 transfers the received azimuth change angle signal cycle data to the azimuth change angle signal cycle data storage means 14 to change the azimuth change angle. The signal pulse width data is input to the azimuth change angle signal pulse width storage means 16 to update the stored data.

On the other hand, the data write / read control means 2
0 is when the control signal from the data separation means 8 is input,
A write control signal for storing the received reference azimuth angle signal cycle data in the reference azimuth angle signal cycle data storage means 19 is output. Similarly, when the control signal from the data separation means 8 is input to the reference azimuth angle signal pulse width data, the write control signal for storing in the reference azimuth angle signal pulse width data storage means 21 is output.

The reference azimuth angle signal cycle data is temporarily stored in the reference azimuth angle signal cycle data storage means 19 by the control signal. Similarly, the reference azimuth angle signal pulse width data is also temporarily stored in the reference azimuth angle signal pulse width data storage means 21 by the control signal. The stored reference azimuth angle signal cycle data is compared with the comparison unit 22 by the read signal from the data write / read control unit 20.
Is output to

In the comparing means 22, when the count number of the clock matches the reference azimuth angle signal cycle data, a pulse is generated and the pulse is output to the pulse shaping means 23. The pulse shaping means 23 detects the rising edge of the pulse and creates a trailing edge of the pulse when the same number of clocks as the reference azimuth angle signal pulse width data is obtained from the rising edge of the pulse, thereby forming a reference azimuth angle signal on the transmitting side. A signal having the same cycle / pulse width is generated and output as a reference azimuth angle signal. At the same time that the reference azimuth angle signal is output, the internal counter of the comparison means 22 is reset.

Each time the control signal from the data separating means 8 is received, the data writing / reading means 20 transfers the received reference azimuth angle signal cycle data to the reference azimuth angle cycle data storage means 19 and the reference azimuth angle signal pulse. The width data is input to the reference azimuth angle signal pulse width storage means 21 to update the stored data.

[0031]

As described above, according to the present invention, the trigger signal and the angle signal are converted into data and transmitted, and only the normally received data is temporarily stored on the receiving side, and temporarily stored.
Since the trigger signal and the angle signal are reproduced by using the stored data, even if each data cannot be received due to the line disturbance, the stored data can be used for the reproduction. Problems such as missing pulse signals do not occur. Therefore, there is an effect that the video can be displayed on the display device without any trouble and the signal processing using the video is not affected by the line disturbance.

[Brief description of the drawings]

FIG. 1 is a block diagram according to an embodiment of the present invention.

[Explanation of symbols]

 1 Trigger cycle calculation means 2 Trigger pulse width calculation means 3 Azimuth change angle signal cycle calculation means 4 Azimuth change angle signal pulse width calculation means 5 Reference azimuth angle signal cycle calculation means 6 Reference azimuth angle signal pulse width calculation means 7 Data multiplexing means 8 Data Separation Means 9 Trigger Cycle Data Storage Means 10, 15, 20 Data Writing / Reading Control Means 11 Trigger Pulse Width Data Storage Means 12, 17, 22 Comparison Means 13, 18, 23 Pulse Shaping Means 14 Azimuth Change Angle Signal Period Data Storage Means 16 Azimuth change angle signal pulse width data storage means 19 Reference azimuth angle signal cycle data storage means 21 Reference azimuth angle signal pulse width data storage means

Claims (2)

(57) [Claims] 1. The radar trigger signal is sampled on the transmitting side by using a clock to sample the cycle and pulse width of a radar trigger signal, the cycle and pulse width of an azimuth change angle signal, and the cycle and pulse width of a reference azimuth angle signal, respectively. period data and pulse width data, periodic data and pulse width data of the orientation change angle signal, and the calculation means for calculating the period data and the pulse width data of each output of said reference azimuth signal, time division each of said data The data multiplexing means for multiplexing and transmitting to the receiving side via the line is provided, and the receiving side separates and outputs the respective data from the transmitted multiplexed signal, and normally receives and separates the respective data. a data separating means for outputting a control signal when, serial to each storing each data output from the data separation means And憶means, before on the basis of the control signal
Serial radar trigger signal of the period data and the pulse width data, writing the orientation change angle signal period data and pulse width data, to the reference azimuth angle signal storing units at periodic data and pulse width data was successfully receiving data each In addition, each data writing / reading control means for controlling reading of the data from each storage means at a constant interval and the clock are counted, and the value is stored in each storage means.
The radar trigger signal is stored, and the comparison means each for generating a pulse when the orientation change angle signal, becomes equal to the period data of the reference azimuth angle signal,
The waveforms of the pulses generated from the respective comparison means are shaped so that the pulse width is equal to the pulse width data of the respective signals stored in the respective storage means, and the radar trigger signal, the azimuth change angle signal, and the reference azimuth angle signal. A radar synchronization signal transmission system comprising: 2. The periodic data of radar trigger signal and power
Pulse width data, cycle data of direction change angle signal and pulse
Width data, period data of reference azimuth signal and pulse width
Separates data from transmitted multiplexed signals and outputs
And when each of those data is normally received and separated
Data separation means for outputting a control signal, and this data separation
Memorizing hands that store each data output from the means
Stage, of the radar trigger signal based on the control signal.
Period data and pulse width data, azimuth change angle signal
Period data and pulse width data, the reference azimuth angle signal
Signal and the pulse width data
When data is received, it is written in each storage means and at regular intervals
Each of the controls for reading the data from each storage means by
Data write / read control means and clock counting
The radar, the value of which is stored in each storage means
-Trigger signal, the azimuth change angle signal, the reference azimuth angle
When it becomes equal to each cycle data of the frequency signal,
Stored in each comparison means and each storage means
Pulse width equal to the pulse width data of each signal
The waveforms of the pulses generated by each comparison means
Shaped, radar trigger signal, azimuth change angle signal and
Each pulse shaping means for outputting a quasi-azimuth angle signal respectively
A radar synchronization signal receiver characterized by having.