JPS6239863B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data error display method, and particularly to a data error display method that is effective when many data errors occur intermittently in a short period of time.

Generally, for example, one piece of telemetry data (about 200 bytes long) sent from an artificial satellite is one piece of telemetry data sent from an artificial satellite.
Telemetry data is sent to the receiving station every two seconds or so, but there is a possibility that a large amount of data errors may occur in a short period of time, such as continuous data errors occurring immediately after transmission starts. .

Conventionally, in order to display to an operator at a receiving station that there is an error in such telemetry data, an error message was output to a console typewriter for each piece of error data.

However, in the conventional type, since the output time of the console typewriter is slow, a large amount of console output queuing buffer is used to temporarily store information related to error data, and the queuing buffer is used for other types of data related to received data. Since the buffer also needs to be used for processing, there is a possibility that the buffer overflows and the processing device at the receiving station goes down. Furthermore, in the conventional type, since an error message is output for each error data, when a large number of errors occur continuously, the console seat becomes extremely cluttered.

In view of the problems in the conventional type described above, an object of the present invention is to provide a data error display method for displaying data errors in a plurality of manually-operated data. Based on the concept of displaying errors for each predetermined number of error data from data, if a large number of data errors occur continuously or intermittently, large amounts of output queuing buffers such as console typewriters can be used. The purpose of the present invention is to prevent the system from going down and to display data errors concisely and appropriately whether data errors occur continuously or only once.

The present invention provides a data error display method for displaying data errors in a plurality of input data, and when the plurality of input data includes a plurality of consecutive error data, the first error data and the last error data are It is characterized in that an error is displayed for each input, and an error is displayed for each predetermined number of error data starting from the first error data.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a telemetry data receiving system as an example of a system to which the method of the present invention is applied. In the figure, radio waves from an artificial satellite 1 are received by an antenna 3 of a transmitting station 2, and processed by a transmission control computer 4 for data recording and data transmission. The received data output from the transmission control computer 4 is input to the processing device 9 of the receiving station 8 via the transmission line 5, the reception transmission control computer 6, and the transmission line 7. The received data is checked for errors in the line input processing section 10 of the processing device 9 and is stored in the data storage file 11. If a data error is found as a result of the error check, an error message is displayed to the operator, and this error message is displayed, for example, by outputting an error message to the console typewriter 12 using a method described later. It can be done.

FIG. 2 shows the format of one unit of received data input to the receiving station in the telemetry data receiving system of FIG. The length of one unit of received data is approximately 200 bytes, and one unit of received data is input every 1 to 2 seconds. Each number in FIG. 2 indicates a byte number, telemetry data is stored after the 21st byte, and data related to the telemetry data is stored in the range from the 1st byte to the 20th byte. Among such received data, the part that is subject to error checking in the line input processing unit 10 (Fig. 1) of the receiving station is the data type (DATA TYPE) section of the second byte marked with an asterisk. The transmitting station number (TX SITE) field in the 3rd byte and the universal time (UT) field in the 12th to 18th bytes.
TIME) terms, therefore an error will be displayed only if there is a data error in these terms. The data type field represents the type of data sent from the satellite, the transmitting station number field represents the number for identifying transmitting station 2 in Figure 1, and the universal time field represents the data received from the satellite. represents universal time. The other items are not particularly related to the present invention, so their explanation will be omitted.

The above-mentioned received data is sequentially input to the receiving station 8, and checked for data errors in the line input processing section 10. If a data error occurs, an error is displayed in the following procedure.

(1) If errors occur consecutively, an error will be displayed when the first error and last error occur.

(2) If N or more errors occur in succession, an error will be displayed for every N errors.

(3) If error data becomes normal data and there is remaining error data, an error will be displayed.

(4) Error display displays the total number of error data, number of errors for each error type, etc.

Figure 3 shows the timing of error display in the received data from the nth to the n+17th.
It is shown as 10. In the same figure, the error type column each indicates in which section of the received data an error occurred. For example, in the n+1st received data, an ○ mark indicates that an error occurred in the data type section. There is. The column for the number of errors shows the total number of error data and the number of each type of error data from the time the error is displayed until the time each data is received. The error display counter is set to the initial value "N-" immediately before receiving data is input and when error data becomes normal data.
This is a ring counter that is set to ``1'' or ``9'', and determines the timing for displaying an error every N cases in the case of consecutive errors. Further, the numbers shown in the error display timing column indicate that the error display will be performed at these times. In other words, is the first error so it is displayed as an error, 10 consecutive error data are displayed as an error, and error data becomes normal data, and there is still error data that is not displayed as an error. Therefore, an error is displayed, and as with , an error is displayed because it is the first error. Errors in these cases can be displayed, for example, by outputting the following error message on a console typewriter or graphic display.

………DATA ERROR (DATA=01;DT=
01, TX=00, TIME=00) ......DATA ERROR (DATA=10; DT=
03, TX=04, TIME=03) ......DATA ERROR (DATA=02; DT=
00, TX=00, TIME=02) ......DATA ERROR (DATA=01; DT=
01, TX=00, TIME=00) FIG. 4 shows the configuration of the line input processing section 10 in FIG. The line input processing section shown in FIG. 4 includes a data register 3 in which received data is set.
0, a data type error detection circuit 31 that detects a data type error in received data;
A calling station number error detection circuit 32 that detects a data error in the calling station number, a universal time error detection circuit 33 that detects a universal time error, and a ring counter 34 for error display with a cycle of 10; It includes an initial setting circuit 35 for setting values, a comparison circuit 36, inverters 37, 38, 39, an AND gate 40, OR gates 41, 42, 43, and an error display device 44.

The operation of the line processing section shown in FIG. 4 will be explained. Received data is sequentially set in the data register 30, and the data type, receiving station number, and The Universal Time section is checked for data errors. As a result, if there is any data error, a high level error detection signal is output from the corresponding error detection circuit, and this signal is sent to the OR gate 41.
is applied to the ring counter 34 via. The ring counter 34 receives a reception start signal S applied via an OR gate 43 prior to inputting reception data.
It is preset to an initial value "9" by the initial setting circuit 35 which receives the input of _ST . Therefore, the ring counter 34 is counted up to "10" by the error detection signal applied via the OR gate 41. The comparison circuit 36 compares the output data of the ring counter 34 and the reference data D _ref , and when the two data match, the output Q becomes high level and the output becomes low level. Since the reference data D _ref is set to "10" in advance, the output Q of the comparison circuit 36 becomes high level in this case, and the output Q is applied to the display device 44 via the OR gate 42 to display an error display. It is done. If there is a data error in the next received data, an error detection signal is similarly applied to the ring counter 34 via the OR gate 41.
Since it has already reached the value of "10", it becomes the value of "1" by this error detection signal. If data errors continue to occur, the ring counter 34 counts up sequentially, and when the value reaches "10", the output Q of the comparator circuit becomes high level, and the output Q is sent to the display device 44 via the OR gate 42. is applied and an error is displayed. Furthermore, if a data error occurs, for example, twice in a row, the ring counter 34 will have a value of "2". If normal data is input next in this state, the outputs of each error detection circuit 31, 32, 33 are all at a low level, so each inverter 37, 3
The outputs of 8 and 39 both become high level. Further, since the value of the ring counter 34 is "2", the output Q of the comparison circuit 36 is at a low level and the output is at a high level. Therefore, the output of AND gate 40 goes high and is applied to display device 44 via OR gate 42 to provide an error indication. Further, the high level output of the AND gate 40 is applied to the initial setting circuit 35 via the OR gate 43, and the ring counter 34 is set to the initial value "9". Next, if there is a single data error in the received data, the ring counter 34 counts up to "10" and the error is displayed again, and the next normal data error after the received data with the data error occurs. The ring counter is again initialized to "9" by inputting the received data.
In this way, the configuration shown in FIG. 4 performs error display according to the procedure described above. In the above description, the display device 44 may be, for example, a console typewriter, a graphic display, or simply turn on a light emitting diode to indicate an error. In addition, if the content of the error display is to display not only the presence or absence of errors but also the number of errors for each type and the total number of errors, each error detection circuit 31, 3 shown in FIG.
By connecting counters for counting the number of errors to the outputs of 2 and 33 and the output of the OR gate 41, the number of errors can be known.

The operations of the line input processing section 10 described above can also be performed by a processing program built into the processing device of the receiving station. FIG. 5 is a flowchart outlining a processing program for this purpose. In the figure, when execution of the processing program starts, first, the total error counter (TOTERRCNT) that counts the number of all error data, the data type error counter (DTERRCNT) that counts the number of data type errors, and the The transmitting station number error counter (TXERRCNT), which counts the number of station number errors, and the universal time error counter (TIMEERRCNT), which counts universal time errors, are all cleared to zero, and the message output corresponds to the error display counter described above. A counter (MSGOUTCNT) is set to an initial value of 9. Next, the error switch (ERRSW) is turned off and the received data is read. Next, it is determined whether or not there is a data type error in the received data, and if there is a data type error, the content of the data type error counter is set to 1.
is incremented by 1 and the error switch is turned on.If there is no data type error, it is determined whether there is a calling station number error, and if there is a calling station number error, the content of the calling station number error counter is incremented by 1 and the error switch is turned on. turned on. If there is no calling station number error, the presence or absence of a universal time error is determined, and if there is such an error, the contents of the universal time error counter are incremented by 1 and the error switch is turned on. Next, or if there is no such error, it is determined whether the error switch is on, and if the error switch is on, the contents of the total error counter and message output counter are each incremented by 1, and then the message output counter is incremented by 1. If the content of the output counter is 10, an error message is output, and if the content of the counter is not 10, the error switch is turned off, the next received data is read again, and the same processing as described above is performed. Further, after determining the presence or absence of the various errors, it is determined whether the error switch is on, and if the error switch is not on as a result of this determination, it is determined whether the content of the total error counter is zero. If the content of the counter is not zero, an error message is output and the program returns to the beginning. If the content of the counter is zero, the error switch is turned off and the next received data is read again and the same process is performed. With such a processing program, data errors can be displayed according to the procedure described above.

As described above, according to the present invention, even when a large amount of data errors occur continuously, the error display is not performed for each error data, but when the first and last error data are input, and when a predetermined number of error data are input from the first error data. Since the error is only displayed for each error data, there is no possibility of system failure due to excessive use of queuing buffer for output.
Furthermore, the output console sheet does not become cluttered, and data errors can be displayed concisely and appropriately whether data errors occur continuously or only once.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a telemetry data receiving system for implementing the method of the present invention, FIG. 2 is a format diagram showing the structure of data received in the system of FIG. 1, and FIG. , FIG. 4 is a block circuit diagram showing the configuration of the line input processing section in the system of FIG. 1, and FIG. 5 is an explanatory diagram showing the display timing of data errors in the system of FIG. 1. This is a flowchart for explaining a processing program for performing the same operation as a line input processing section in the system. DESCRIPTION OF SYMBOLS 1...Artificial satellite, 2...Sending station, 3...Antenna, 4...Transmission control computer, 5...Transmission line, 6...Transmission control computer, 7...Transmission line, 8...Receiving station , 9... processing device, 10...
...Line input processing unit, 11...Data storage file, 12...Console typewriter, 30...
Data register, 31...Data type error detection circuit, 32...Calling station number error detection circuit,
33...Universal time error detection circuit,
34... Ring counter, 35... Initial setting circuit, 36... Comparison circuit, 37, 38, 39... Inverter, 40... AND gate, 41, 4
2,43...or gate, 44...display device.

Claims (1)

[Claims] 1. In a data error display method that displays data errors in multiple input data, if the multiple input data includes multiple consecutive error data, the error data will be displayed when the first error data and the last error data are input. A data error display method characterized by displaying an error and also displaying an error every predetermined number of error data starting from the first error data.