SU553648A1 - Device for receiving information in multichannel telemetry systems - Google Patents

Description

one

The invention relates to the field of measurement technology and can be used in devices for processing information of signal parameters of telemetry systems.

Known receiving telemetry devices containing the distributor, the source of information, the elements And, the driver and the transmitting unit 1.

The drawback of the device is the absence of a noise protection circuit.

The devices and signal processing telemetry systems also contain information. They contain a channel selector, the input of which is connected to the terminal “Input I of the device, the first output - to the input of the information processing unit 2. The device provides protection against interference presented as short-term signals.

The disadvantage of such a device is that it does not provide protection against various interferences in the information of signal parameters and does not provide redundancy redundancy.

The aim of the invention is to increase the noise immunity and efficiency of the device.

The goal is achieved by the fact that a block for determining the state of objects, a block for selecting the response time of objects, a block of memory

and an analyzer of the state of objects and the operation time of objects. The first output of the channel selector is connected to the first input of the object state determination unit, the second input of which is combined with the first input of the operation time selection block and connected to the output of the information processing unit. The second output of the channel selector is connected to the second input of the object pickup unit, the output of which and the first outputs of the object state analyzer and the object pickup time and the object state determination unit are connected to the corresponding inputs of the memory block, the output of which is connected to the first state analyzer input objects and time of operation of objects, the second input of which is connected to the terminal "Input II. The output of the object state analyzer and the object response time are connected to the terminal “Device output.

FIG. 1 shows a block diagram of the device.

The device contains a channel selector 1,

an information processing unit 2, a unit for determining the state of objects 3, a block for allocating the response time of objects 4, a memory block 5, an analyzer of the state of objects and an operation time of objects 6.

FIG. Figure 2 shows timing diagrams explaining the sequence of highlighting reliable informa tion of the signal parameters when the object is triggered. Timing diagrams are given for one signal and parameter (one bit of code group).

Time charts show

a) the physical state of the object (on, off);

b) moments of passing the cyclic interrogation signals of the object;

c) a sequence of information signals at the input of the processing unit, displaying the physical state of the object (section 1 shows false signals whose appearance is not associated with a change in the state of the object; section 2 shows signals that select "contact bounce when the state of the object changes ; in section 3 - loss of signal, not related to a change in the state of the object, and in section 4 - change in the state of the object without interference);

d) a sequence of signals on the output of the processing unit 2, corresponding to the moments, there the changes of the states in the given discharge are

information;

 e) passing information about the state and time of operation of the object to the output of the state analyzer and time of operation of objects corresponding to a reliable change in the state of the object, in momeite T,

t f io, J aNa “Input I of the device receives streaming information.

Channel 1 selector provides the choice of code groups with information of signal parameters and time and transferring them to separate outputs: processing unit 2, unit for determining the state of objects 3, and block for selecting the response time of objects 4 (Fig. 2c).

The processing unit 2 compares the code lines arriving at successive points in time and extracts signals corresponding to the moments of changing the bit states in the code groups.

When the state changes in one or several bits of the code group, the processing unit 2 generates signals that, from its output, go to the state determination unit of objects 3 and the allocation unit of the response time of objects 4 (Fig. 2, h). In this case, blocks 3 and 4 provide for the allocation of code groups in which the states of the bits were changed and the time corresponding to the moment of the change of the states was selected.

The selected code groups, together with the time, arrive at the memory block 5. After placing the information in the memory, the state and response analyzer of objects 6 provides a sequential selection of information from the memory block and analyzes the state and time to extract reliable information at the output of the device. Before the processing starts, the input of the state analyzer and the response time of the object 6 and of the "Input device II" is constant D.

5 To exclude false information, the following conditions were chosen, if, where is the interval between neighboring actions —At — the task is a constant value that characterizes the minimum interval between the operations of one object; Tn is the moment “-TH measurement of the state

single object

This is followed by counting the neighboring GDs satisfying this condition.

If the number of specified T is odd, then all changes of states related to these D are considered false and, together with the times corresponding to them, are excluded and are not transmitted to the output of the device (sections 1, 3 of the time diagram of Fig. 2 d, e). Here, the intervals of change of states (), (Гз-Т2), (T / J, -Гз) satisfy the condition. 5 The number of indicated intervals in this area is 3, i.e., odd, therefore, the state changes were false and the times 7i, TZ, T-3, T.i together with the corresponding states on the output of the device are not transmitted.

If the number of neighboring ATs that satisfy the condition is even, then all the corresponding state changes are considered to be an “on / off bounce”, and the start time Tn-i corresponding to the first AT interval is selected as the start of switching on (off) by transmission is transmitted to the output of the device (Fig. 2), section 2. At time T, r-1, corresponding to 0 this interval, is considered reliable and transmitted to the output of the device together with its corresponding state (Fig. 2, section 4) Hz- 7io A.

As a result, the output of the device is transmitted to the synthesis information corresponding to reliable changes in the state of the object.

The use of the proposed device makes it possible to significantly reduce the cost of manual labor and time for analyzing and processing information of signal parameters.

Claims (2)

1.Agadzhanov P.A. and others. “Fundamentals of radio-telemetry, 1971, pp. 148-153. 2. USSR author's certificate number 232608, cl. G 06f 7/00 09.20.67 (prototype). t Bxodl eioifod