JPH04113798A - Satellite telemetry edit device - Google Patents

Abstract

PURPOSE:To attain the processing without improving the performance of a host computer even in real time high speed processing or the like for a telemetry data by extracting an optional word in the satellite telemetry data with an external simple hardware, packing the word and inputting the result to the host computer. CONSTITUTION:An effective word extraction circuit 2 generates an effective word detection pulse representing a timing of an extracted word based on information representing which word is to be extracted in a frame of a telemetry signal given from a host computer. A frame number count circuit 3 counts a frame number and generates a switching flag based on information representing number of words extracted how many number of frames are used for input and output units altogether given from the host computer. Address counters 5a, 5b generate a write address of a word extracted alternately in each input output unit based on the switching flag and the effective word detection pulse to RAMs 4a, 4b and generate a read address when no write address is generated based on a read command from the host computer and the switching flag.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a satellite telemetry editing device, and in particular, to extracting and backing necessary words from satellite telemetry before entering the satellite telemetry into a computer for display and analysis. Connect to satellite telemetry editing equipment.

[Conventional technology]

When inputting received and demodulated satellite telemetry and performing various real-time display and analysis processes, it is necessary to extract only the words necessary for processing from the satellite telemetry. It was done with software on the computer.

[Problem to be solved by the invention]

In the conventional system described above, the display/analysis computer is burdened with extracting and backing the required words from the telemetry data. Therefore, in order to perform high-speed real-time processing of telemetry and narrow extraction in word units, the computer needs to be loaded. The drawbacks are that performance must be improved, the system cost is too high, and if the extraction pattern changes (change in processing content), the extraction software needs to be rewritten.

An object of the present invention is to provide a satellite telemetry editing device that can reduce the cost of the entire system by sharing the above-mentioned load on the computer.

[Means for Solving the Problems] The satellite telemetry editing device of the present invention edits words to be extracted based on information about which words to extract in a frame of the telemetry signal given from a host computer that processes the telemetry signal. A valid word extraction circuit that generates a valid word detection pulse that indicates the timing, and a frame number based on information given from the host computer about how many frames of the words to be extracted are to be combined into an input/output unit. a frame number counting circuit that counts and generates a switching flag; and a frame number counting circuit that generates a write address of the word to be extracted alternately for each input/output unit based on the switching flag and the effective word product ratio pulse, and generates the switching flag. and two address counters that generate a read address when the write address is not generated based on a read instruction from the host computer;
and two RAMs for temporarily storing the word to be extracted based on the write address and read address.

Further, the telemetry editing device of the present invention includes an S/P conversion circuit that converts a serial telemetry signal from a telemetry demodulator into a parallel telemetry signal with a predetermined number of bits, and the above-mentioned parallel telemetry signal outputted by this S/P conversion circuit The word to be extracted from the telemetry signal may be temporarily stored in the RAM.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

In FIG. 1, 1 is an S-P conversion circuit, 2 is an effective word extraction circuit, 3 is a frame number counting circuit, 4a and 4b
is a RAM, 5a and 5b are counters for the RAMs 4a and 4b, and 6a to 6d are bus gates.

First, the host computer (not shown) receives information (
(word extraction button) and information on how many frames are to be the unit of one transfer with the host computer (frame backing number), and set them in the valid word extraction circuit 2 and frame number counting circuit 3, respectively. . Next, a bit serial telemetry signal inputted from a telemetry demodulator (not shown) is converted into 8-bit parallel telemetry data by an S-P conversion circuit 1 based on a pit clock. At this time, the valid word extraction circuit 2 generates a write pulse (valid word detection pulse) for only valid words using the word clock input at the same time, and this write pulse is input to the counter 5a to generate a write address. By doing so, the required telemetry data can be stored in one side of the RAM (
In this case, it is written to RAM4a). Since read data exists on the bus during this write, gates 6a and 6d are opened and gates 6b and 6c are closed to make this data exclusive.

Next, when telemetry data for only one batch is input, the RAM switching flag, which is the output of the frame number counting circuit 3, is used to switch from RAM 4a to RAM 4b. The next write goes to RAM4b.

When a read request (read pulse) comes from the host computer while writing to RAM4b, the read pulse is sent to RAM4b.
It is made exclusive with a switching flag and input only to the RAM 4a. Also, the gates 6a and 6d are closed, the gates 6b and 6C are opened, and the RAM 4 is written while the RAM 4b is being written.
The telemetry data already stored in a is sequentially read out and transferred to the host computer.

On the host computer side, since only the necessary words have already been extracted and backed from the input telemetry data, the subsequent processing software can immediately perform processing such as engineering value conversion and display.

〔Effect of the invention〕

As explained above, the present invention enables high-speed real-time processing of telemetry data and small word-based Extraction processing can also be carried out without increasing the performance of the host computer, reducing the cost of the entire system, and the extraction word can be changed without changing the software of the host computer.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... S-P conversion circuit, 2... Valid word extraction circuit, 3... Frame number counting circuit, 4a, 4b...
RAM, 5a, 5b-RAM counter, 6a-6d・
...Bus gate.

Claims (1)

[Claims] 1. Generating a valid word detection pulse indicating the timing of a word to be extracted based on information about which word to extract in a frame of the telemetry signal given from a host computer that processes the telemetry signal. A frame that counts the number of frames and generates a switching flag based on a valid word extraction circuit and information given from the host computer about how many frames of the words to be extracted are to be combined into a unit of input/output. A number counting circuit,
Generate write addresses for the word to be extracted alternately for each input/output unit based on the switching flag and the valid word detection pulse, and generate the write address based on the switching flag and a read instruction from the host computer. A satellite telemetry editing device comprising: two address counters that generate a read address when the order is not received; and two RAMs that temporarily store the word to be extracted based on the write address and the read address. 2. Includes an S/P conversion circuit that converts a serial telemetry signal from a telemetry demodulator into a parallel telemetry signal with a predetermined number of bits, and the extracted word in the parallel telemetry signal output from the S/P conversion circuit. The satellite telemetry editing device according to claim 1, wherein the satellite telemetry editing device temporarily stores the information in the RAM.