SU1197146A1 - Device for displaying measuring information - Google Patents

Abstract

A DEVICE FOR DISPLAYING MEASURING INFORMATION RELATIONSHIP, containing serially connected measurement unit, switch: torus, voltage converter - time interval and scaler, as well as a mixer, the output of which is connected to the input of the video monitor unit, the first input is the input of the television signal and is connected to the input of the sync selector, the first output of which is connected to the first input of the control unit and to the second input of the voltage converter - time interval,. and the second output is connected to the second input of the control unit, the first output of which is connected to the second input of the switch and the third input of the voltage converter, the time interval, the second output is connected to the second input of the scaler, and the third output is connected to the second input of the mixer, characterized in that , in order to improve the accuracy of the display of measurement information and enhance the functionality by providing the ability to conduct and display tolerance control, a shaper is inserted into the black control codes, E-trigger, the first AND element and the signal carrier generator, as well as the second AND element, the coincidence unit, the first delay unit, the third And element, the second delay unit and the alarm unit, connected in series and connected between the fourth output of the unit control and the third input of the signal generator of the scale, the fourth input of which is connected to the second output of the control unit through the driver of the control codes, and the output is connected to the first input of the D-flip-flop, the second input of which is connected to the fifth output of the control unit and control, and an output connected to a third input of the mixer, the fourth input of which through subcarrier signal generator coupled to the third output of the control unit, the second input of the second AND gate connected to the first input of. the scale signal and the first input of the first element AND, the second input of which is connected to the sixth output of the control unit, and the output connected to the second input of the second delay unit, the seventh and eighth outputs of the control unit are connected to the second inputs of the coincidence unit and the signaling unit respectively, and the second The inputs of the first delay unit and the termination element I are connected to the second output of the sync selector.

Description

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The invention relates to television technology and can be used in the construction of control systems for television channels.

The purpose of the invention is to improve the accuracy of the display of measurement information and enhance the functionality by providing the ability to conduct and display tolerance control.

The drawing shows a block diagram of a device for displaying measurement information.

The device for displaying the measurement information contains a mixer 1, a video monitoring unit 2, a sync selector 3, a measurement unit 4, a switch 5, a voltage-time converter 6, a scaler driver 7, a control unit 9, a subcarrier signal generator 9, a control code driver 10, -trigger 11, the first element And 12, the second block 13 of the delay, block 14 alarm, the second element And 15, block 16 matches, the first block 17 of the delay and the third element And 18.

A device for displaying measurement information operates as follows.

At the first input of mixer 1, a full television signal is received, displayed by the video monitoring unit 2. At the same time, signals to be measured, such as audio signals, a video signal, etc., are input to the measurement unit 4.

The monitored signals, converted accordingly into block 4, through the switch 5 are fed to the first input of the converter 6, in which they are converted into time intervals, which are then displayed on the screen of the video control unit 2 as straight line segments.

To read the values of these segments, the image of the measuring scale is displayed on the screen simultaneously with them in the form of a system of Cartesian coordinates with level marks, with explanatory inscriptions and numbers.

Shaper 7 is used to form the measuring scale.

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scale signal, driver 10 control codes and Z-trigger 11. In the mixer, 1 part of the video signal (for example, the lines at the bottom of the raster)

5 is deleted and the scale signal is mixed in its place. For synchronization of strikeouts, scale generation, switching of measured signals, etc. a syncro selector-3 and a control unit 8 are used. In the sync selector 3, the synchronization signals are made from the full video signal and are divided into horizontal and frame frequency components, which are received respectively at the first and second inputs of the control unit 8, consisting of a clock generator, horizontal and vertical sampling counters and decoders. I h

The mixer 1 includes a controlled latch circuit, an adder with three inputs and an output amplifier. Crossing out part of the video signal

produced by affixing (fixing) it to a certain level. The fixation circuit is controlled by a special pulse, which is formed in the control unit 8 and from its third output goes to the second input of the mixer 1.

A fixation circuit eliminates simultaneously the luminance and color components of a video signal. However, the suppression provided by this circuit is not infinite and therefore interference components may penetrate into the open chroma channel of the video control unit 2 in the strikeout interval

40 are in the spectrum of the color subcarrier, and the remainder of the unsuppressed subcarrier.

When processing the chroma channel of the video monitoring unit 2, the interference components evoke distortion of the type of color torches on its screen.

To eliminate this phenomenon, an auxiliary color subcarrier formed by the subcarrier signal generator 9 is mixed into the video signal in the strikeout interval. In the event interval, generator 9 generates a subcarrier signal, which is fed to the fourth input of mixer 1. At other times, generator 9 is inhibited. The auxiliary subcarrier is processed by a chrominance unit, and the measuring scale is displayed on the screen against a color background. In this case, the background color can be selected by selecting the frequency of the generator 9. On the screen of the black and white video monitoring unit 2, the subcarrier creates a dark background. In block 4 of measurements, the sequence of controllable 1x signals is converted into a series of voltages, the powers of which are proportional to the magnitudes of the measured parameters. In this unit, which is a multichannel meter, the measured signals are subjected to the necessary processing. For example, in the case of measuring sound levels, this is amplification and full-wave quasi-peak detection. A series of voltages obtained at the output of the measurement unit 4 using the switch 5, controlled by address codes from the first output of the control unit 8, is converted into a sequence of pulses modulated in amplitude. The number of pulses is equal to the number of measured parameters, the amplitude is proportional to the value of the corresponding parameter, and the duration T is determined by the duration of the pulses of the address codes and is equal to several lines of the television sweep. In converter 6, these pulses are converted into pulse packets, the number of chips is equal to the number of measured parameters. In the imaging unit 7, these pulses are mixed with the signal of the measuring scale and displayed on the screen of the video monitoring unit 2 as horizontal stripes, the length of which is proportional to the measured parameters, and the location on the screen and the width are determined by the duration of the address code pulses. To output the measurement information from the lower part of the raster, which allows you to forgive the construction of the mixer 1 In those cases when other areas of the raster are used for outputting the measurement information, for example, the top or side sections, special filters — plugs that prevent crossing out chrominance signals. The additional images displayed on the screen in this case turn out to be colored in those colors that should have the crossed out images. In this case, the intelligibility is impaired and it becomes difficult to recognize the entered information, i.e. display quality deteriorates. In the proposed device, the chrominance signals are crossed out, and other signals are mixed in their place. As a result, measurement information is displayed on a background of constant chromaticity. For the display of the measuring scale, the shaper 7 shaper and shaper 10 control codes are used, which can be made in the form of permanent storage devices (ROM). Shaper 7 synthesizes the signals of individual characters (letters and numbers), as well as the simplest graphic elements from which the scale image is composed. The address inputs of the formers 7 and 10 are provided for the intra-digit (low-order) and inter-digit (high-order) intervals of the raster discretization, respectively, generated by control unit 8. In this case, character codes are written in the imaging unit 10, which must be sequentially displayed on the screen during the scanning of the scale image. These codes are sent to the control inputs of the driver 7, a certain sequence of characters appears at its output in accordance with the sequence of input codes. To change the type of scale in this case, it is enough to change the program recorded in the driver's ROM 10. To eliminate interference in the driver's output signal 7, the signal from the output of the scaler 7 is fed to the third input of the mixer 1 through the input to the mixer 1. trigger 11. D, 15 of this scale signal arrives at the information input of the D-flip-flop 11, and the re-write pulses from the fifth output of the control unit 8 arrive at its clock input with a delay. The magnitude of the delay must be chosen taking into account the maximum delays in the formation chains. The signal of the scale rewritten in this way has no defects caused by the occupancy, and the corresponding image has no false contours. The detection of a parameter that has gone out of the norm in the proposed device 1 uses the loudspeaker coding of the measuring pointers and the warning sound signaling. To generate these signals, the first And 12 element, the second delay unit 13 and the signaling unit 14 are used. The first element 12, to the second input of which from the sixth output of block 8 receives a signal of the zone of an unacceptable level, and the first input from the breather of the converter 6 is a measurement signal in the form of a sequence of width-modulated pulses, forms a signal of coincidence zones. This signal starts the second block 13 of the delay, made in the form of a blowing multivibrator, and after it, in turn, generates a start signal for the signaling unit 14. When KaKofo comes out of the parameters from the zone of permissible levels, through the signaling unit 14, the third input of the generator of the scale signal 7 receives modulating pulses from the eighth output of the control unit 8, which produce luminous modulation of the measurement indicators. In addition, an audible alarm is activated. The signaling time is determined by the constant time of the second delay unit 13. The second element And 15, block 16 of the drops, the first block 17 of the delay and the third element And 18 are used to analyze the presence or absence of equivalence of monitored parameters. This is necessary when the device is used to measure the same parameters (for example, the level n of the audio signal of a television or the level of a video signal) at different points in the path. In this case, the simultaneous presence or absence of a signal in several channels is considered the norm, and its presence in some channels and the absence of one in others is considered an emergency. The first input of the element 15 from the fourth output of the control unit 8 receives a signal from the control zone, within which the presence or absence of a signal in various measuring channels should be analyzed. The second input of the specified element comes from the output of the transform 466 bodies 6 total measuring signal. The second element 15 forms the sum signal of the measurement signal with the signal of the control zone, which then goes to the first input of the block 16 matches. To the second input of the block 16, potsans from the seventh output of the control block 8 signals the horizontal horizontal discretization of the raster, within which the measuring indicators of the monitored parameters are formed on the screen of the video control block 2. channels whose phases do not match. Further, these signals are phased and sent to the exclusive OR circuit, which verifies their equivalence. In the absence of equivalence, the output of block 16 receives a start signal at the first input of the first block 17 of the delay, made in the form of a pulse counter. The pulse counter starts counting the frame sync pulses arriving at its clock input from the second output of the sync selector 3. The choice of the constant time of the first delay block 17 is determined by the possible relative signal delays in control channels and physical processes in the measurement block 4. For example, when measuring the levels of audio signals, a need arises for a delay of several seconds. If during the time equal to the delay time, the signal of equivalence does not appear at the output of block 16, then the delay block 17 generates an enable signal arriving at the first input of the third element And 18, which, in turn, starts the second delay block 13. In this case, the alarm unit 14 is triggered, as in the case of the output of the measured parameter from the tolerance. If during the time equal to the delay time, an equivalent signal appears on the output of block 16, then the counter of the first delay block 17 is set to zero and the signaling block 14 does not work.

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Claims (1)

DEVICE FOR DISPLAYING MEASURING INFORMATION, containing series-connected measurement unit, switch, voltage converter - time interval and signal conditioner · scales,. as well as a mixer, the output of which is connected to the input of the video control unit, the first input is the input of a television signal and connected to the input of the sync selector, the first output of which is connected to the first input of the control unit and to the second input of the voltage converter - time interval,. and the second output is connected to the second input of the control unit, the first output of which is connected to the second input of the switch and the third input of the converter is a voltage time interval, the second output is connected to the second input of the scaler, and the third output is connected to the second input of the mixer, characterized in that, in order to increase the accuracy of the display of measuring information and expand the functionality by providing the possibility of conducting and indicating tolerance control: a control shaper has been introduced into it -governing codes, D-flip-flop ,. the first element And and the subcarrier signal generator, as well as the second element And, the coincidence block, the first delay block, the third element And, the second delay block A. The alarm block connected in series and connected between the fourth output of the control unit and the third input of the scaler, the fourth input of which is connected through the driver of control codes to the second output of the control unit, and the output is connected to the first input of the Ό-trigger, the second input of which is connected to the fifth output of the control unit, and the output is connected to the third the mixer input, the fourth input of which is connected to the third output of the control unit via the subcarrier signal generator, the second input of the second element And is connected to the first input of the scaler and to the first input of the first element And, the second input of which is connected to the sixth output of the control unit, and the output connected to the second input of the second delay unit, the seventh and eighth outputs of the ynpaiBlock unit are connected to the second inputs of the coincidence unit and the signaling unit, respectively, and the second inputs of the first delay unit and the third ementa and is connected to the second house vyho sinhroselektora. 1 11