JPS5916223B2 - How to set lane numbers for Decca navigation receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION - The present invention relates to a new lane number setting method for a DETSUKA navigation receiver that automatically sets lane values.

□、Among radio wave navigation methods,
7, developed by the British company Decca.
Currently, phase difference navigation systems using frequencies of about 0 to 130KH2 are well-known.

This method is named "Detsuka Navigation" after the company that developed it.
This term will be used hereafter in this specification as well.

The above Detsuka navigation system is a type of hyperbolic navigation system,
□On the transmitting side, three slave stations are placed at locations corresponding to the vertices of a regular triangle, with the main station at the center.

These four stations emit radio waves that maintain a strictly constant phase relationship with each other.

The frequency of the emitted radio waves is an integral multiple of the frequency f, and the main station has a frequency of 6f, and the three slave stations have a frequency of 5f and 8f, respectively.
, emits a 9f continuous wave.

However, f is usually chosen to be 14KH2.

A station with a transmission frequency of 5f is called a purple slave station, a station with a transmission frequency of 8f is called a red slave station, and a station with a transmission frequency of 9f is called a green slave station.

The receiving side is usually a ship, which first measures the phase difference between the radio waves coming from the master station and one slave station, then measures the phase difference between the radio waves coming from the master station and another slave station, and calculates the fixed value for both sides. Based on this, the receiving position, that is, the position of one's own ship can be known, and furthermore, the route of one's own ship can be accurately known through continuous measurement, making navigation easier.

Now, the receiver used for this deck navigation is usually equipped with four types of instruments.

Three of them are designed to display zone codes and lane numbers based on the measured phase difference, and are a type of phase difference meter, commonly called a decometer.

The other type of meter is a device that identifies lanes and displays the results, and is called a lane discriminator, and the other three types of meters are set based on this discriminator.

The role of this instrument will be briefly explained below.

When a vessel equipped with a DETSUKA navigation receiver enters within the range of DETSUKA navigation during navigation, or when the receiver is restarted after being inactive for a certain period of time, the vessel is in any zone. , it is necessary to first know whether the vehicle is still in the designated lane in the zone, and immediately set the three types of phase difference meters (decometers) to the zone code and lane number.

Among these, the zone code can be known without using the transmission signal of the transmitting station, but in order to know the lane, it is necessary to use the lane identification signal emitted from each transmitting station.

The lane identification meter measures and displays the own ship's lane number and the first fraction of the number of lanes based on the above lane identification signal, and the ship's crew can use the display on this lane identification meter as an auxiliary means for initial lane setting. The three phase difference meters are set up as shown below.

Conventionally, the setting of the phase difference meter has been done manually by the ship's crew as described above, which is not only troublesome and time-consuming, but also prone to misreading of the lane discrimination meter, wrong setting of the phase difference meter, etc. was there.

Naturally, such an error may cause the ship to be unable to confirm its position, and may even deviate from the planned route.

The present invention fundamentally solves the above-mentioned problems by automatically setting the lane number of each phase difference meter using an electronic circuit, and will be described in detail below with reference to the drawings.

That is, the figure shows a circuit system diagram of an embodiment of a deck receiver for carrying out the lane number setting method according to the present invention.In this embodiment, the lane identification signal is of a multi-pulse type, that is, the frequency is 5f, 6f, 8f. .

All 9f shall be used in a chain in which each transmitting station transmits in sequence for a short period of time, and each phase difference meter shall have all numbers and symbols displayed in numbers, except for the rune '/100 (centilane). The elements are configured to provide digital display.

For simplicity, only the "purple" channel of the phase difference meter and its drive circuit system are shown, but the "red" channel and the "red" channel are also shown.
The circuit configuration is exactly the same for the "green" channel.

In the figure, a lane identification circuit system 1 identifies lanes based on a signal with a frequency f obtained from a multi-pulse received by a receiving unit 10 having an antenna and a signal with a frequency 6f obtained by receiving a transmission signal from the main station. The operation is performed and the result is output as a digital signal of up to the first fractional number between lanes (up to 1/10th lane).

Multi-pulses are transmitted from the master station and each slave station at 2.5 se
Since the digital signals are emitted sequentially at intervals of c, in this embodiment, the digital signals are sent out from a single line as a time series similar to the received signal.

This time-series signal is branched, and one side drives a lane discriminator 3 via a decoder 2 to display lane numbers up to the first fractional lane, such as ``51.IJ.''

The other of the branched time series signals is input to the lane identification signal switching circuit 4.

The switching circuit 4 serves to distribute lane identification signals sent in time series to the corresponding phase difference meters.

That is, according to the present invention, since the display value is set on each phase difference meter based on the output of the lane identification circuit system when the lane number is set during the initial operation of the receiver, It is necessary to switch and supply the lane identification signal sent as 1 to the drive circuit system attached to the corresponding phase difference meter by the lane identification signal switching circuit 4, and the switching circuit 4 switches between the three circuits. It has the same effect as a rotary switch.

However, it goes without saying that the switching timing must be set so that the required signal can be sent to the predetermined phase difference meter.

In the figure, P is a line for sending signals to the ``purple'' phase difference meter, R to the ``red'' phase difference meter, and G to the ``green'' phase difference meter.

The signal passing through the line P passes through the counter control circuit 5, enters the lane number counter 6, drives the digital display section 8 of the phase difference meter via the decoder 7, and displays the lane number, for example "51". display.

In this way, when the receiver starts operating, the integer part of the indicated value of the lane discriminator 3 is automatically transferred to the lane number display section 8, and the initial setting is completed.

From now on, the display section 8 will display only the lane number that does not include the fraction between lanes, that is, the part above the decimal point of the lane number, and the fraction between lanes will be displayed on a rotary meter 9 (hereinafter referred to as fraction meter).
It is carried out by

In other words, after the lane numbers are automatically set as described above, the signals corresponding to the phase difference between the signals of the main station and the purple slave station measured by the receiver 10 are divided into a pair of mutually orthogonal fractions of 9, as in the past. is given as the driving current for the coil,
The fraction total 9 displays the fraction between lanes in units of centilane, that is, 1/100 lane.

Each time the fraction counter rotates once, the number indicating the lane number on the digital display section 8 is added up by one.

The above operation is exactly the same for the "red" and "green" phase difference meters, so parts related to both phase difference meters are omitted from illustration.

However, of course, depending on the number of lanes related to each phase difference meter,
The counter 6 of the "purple" phase difference meter shown is in 30 base 30, and the force 2 ita attached to the "red" and "green" phase difference meters (not shown) are 24 base and 18 base, respectively.

Since the setting of the knee t lane has been made, as is clear from the explanation so far, the setting does not require manual adjustment of the instruments, but is simply a simple switch to operate and set. After completion, it is only necessary to carry out a switching operation so that the phase difference meter is driven by the phase difference between the received signals and the multi-pulse ring.

. By the way, the difference between the lane number decimal number 1 value of the lane identification meter 3 calculated based on the multi-pulse and the centilane display measured by the receiver 10 and displayed in the fractional total 9 (
There is a valley where some leather tools appear.

The reason for this is, for example, the difference in the radio wave propagation state depending on the frequency, and the difference usually does not exceed 0.5 lanes.

However, depending on how the lane number is set, the '/100 lane digit number (
In some cases, the difference between the lane number displayed as a decimal (1st place) and the fractional total of 9 may be quite large.

In other words, one side displays a value close to O (for example, 0, 1),
If the other side indicates a value close to 1 (for example, 0.92), if the integer part of the display value of the lane discrimination meter 3 is transferred as is to the digital display section 8 of the phase difference meter as described above, the indications of both will be matched. For example, 1-51. The result is a large difference between IJ and ``51.92'', which is almost the same as Rune's.

Therefore, in the present invention, the first digit of the fractional lane in the display value of the lane discrimination meter 3 is small (for example, in the case of a display value of 51.1) and is indicated in units of centilane with a fractional total of 9. If the value of the fractional lane is large, the counter 6 is set to a value that is 1 smaller than the display of the integer part of the lane discriminator 3, and the digital value "50" is displayed on the display section 8.

As a result, the display of the phase difference meter combined with the indicated value of the fraction meter 9 can be read as l"'so, 98J, so the difference between the two display values is approximately 0.
．． There will be 2 lanes, which is a reasonable value.

In the case of the opposite situation, the display value of the integer part of the lane discriminator 3 is increased by 1 and set on the digital display section 8.

For example, the display value of the lane discriminator 3 is large, such as 51.8J, and the display value of the fractional lane number 1 is large, and the indicated value of the fractional lane 9, based on the measurement result of the receiver 10, is small, such as 0.01. In this case, "52" is set on the digital display section 8 so that the difference between the two instruction values is as small as 0.23 lane.

In order to correct the lane number set value as described above, it is necessary to compare the position of the pointer and the number below the decimal point of the lane identification meter in the form of electrical quantity. Bye.

If the first number of the fractional lane of lane identification total 3 is 0.1 or 0. If the indicated value of the fraction meter 9 is 0.75 lines or more, change the number on the digital display of the phase difference meter to 1.
On the other hand, if the number in the fractional lane of the renin discriminator is 7°8 or less, and the fractional indicator indicates 6.25 lane or less, add 1 to the number on the phase difference meter. counter 6
Initialize the lane number.

This is possible if the word, force, and writer are made reversible.

Further, the numerical comparison described above can be performed in either the form of a digital quantity or the form of an analog quantity.

Figure 11 shows the circuit system for the above correction. According to the lane number setting method according to the present invention as described above, lane value setting can be performed completely automatically, so the trouble and time of manual setting can be saved, and errors in operation and reading can be avoided. It has the great advantage that it does not occur.

Furthermore, if the lane identification meter's indication differs from that of the decometer, it is automatically corrected, eliminating the need for manual correction.This, combined with the automatic lane value setting, makes it easier to handle the receiver. Since it is greatly simplified, even if an unskilled person operates the receiver, there will be almost no problems.

Therefore, the present invention is extremely advantageous especially when applied to a deck navigation receiver installed in a small boat.

[Brief explanation of the drawing]

The figure is a system diagram showing the main part configuration for explaining the lane number setting method of the Detsuka aviation receiver according to the present invention. 1: Lane identification circuit, 2: Decoder, 3: Lane identification meter, 4: Lane identification signal switching circuit, 5: Counter control circuit, 6: Lane number counter, 7: Decoder, 8: Digital display, 9: Fractional number Total, 10: Receiving section, 11: Correction circuit system.

Claims (1)

[Claims] 1 A lane identification circuit system that identifies and displays the lane at the receiving position based on the received lane identification signal up to the first lane fraction, and a lane identification circuit system that identifies and displays the lane fraction between lanes in centimeter lanes according to the phase difference between the received continuous waves. A fraction counter that displays units, a display drive circuit that integrates the integer part of the lane number and generates a display signal corresponding to the operation of the fraction counter, and a lane that is driven by the output of the display drive circuit. Equipped with a lane number display section that digitally displays the integer part of the number,
When initializing the digital display value of the lane number display section, the difference between the indicated value of the fractional meter indicated in units of centilane and the indicated value of the first inter-lane fraction of the lane identification circuit system is a predetermined value. If the difference between them is minimized, the indicated value of the integer part of the lane identification circuit system is increased or decreased by the number of runes and then inputted to the display driving circuit to obtain the digital display value for the lane number display section. A lane number setting method for a DETSUKA navigation receiver, characterized in that the lane number is set.