摘要:
A plurality of pulse motors (225X, 225Y, 225Z) can rotate driver devices (222X, 222Y, 222Z). The driver devices are fitted in the parts of, for example, a horizontal oscillation circuit, a vertical output circuit and a power source circuit of a television circuit, which are formed on a printed circuit board (220). The outputs of the horizontal oscillation circuit, vertical output circuit and power source circuit are supplied to a digital frequency counter (223X), a first digital voltmeter (223Y) for measuring vertical amplitude and a second digital voltmeter (223Z) for measuring power source voltage, respectively. They are converted into digital data.The output data of the digital frequency counter (223X), the first digital voltmeter (223Y) and the second digital voltmeter (223Z) are compared with predetermined data at digital comparators (224X, 224Y, 224Z), respectively. The digital comparators (224X, 224Y, 224Z) can produce signals for changing the direction of rotation of the corresponding pulse motors or signals for stopping the corresponding pulse motors, in accordance with the results of comparison of the input data and the predetermined data. When the outputs of all the digital comparators are signals for stopping the pulse motors, the supply of drive pulses to the pulse motors is stopped by a logic circuit (230).
摘要:
An electronic chassis supports a plurality of modules each provided with a small pin-point light such as a light emitting diode which will be energized only so long as the module is functioning. A back panel for the chassis in turn is provided with a plurality of observation openings respectively dimensioned and directed to be in line of sight alignment with the light emitting diodes on the plurality of modules. The arrangement is such that no ambiguity exists as to an opening and its associated module. Indentifying characters either numbers or letters are provided on the modules so that they can be visually distinguished from each other and corresponding identifying numbers or characters are provided on the back panel adjacent to the opening so that each opening has an identification corresponding to the identification of only that module whose light emitting diode is in the line of sight of the opening. A consumer can thus immediately observe through the openings which one or ones of the modules are mal-functioning by the absence of light and immediately identify such module by the identifying information adjacent to the opening on the panel from which no light is visible so that a new module can be ordered without having to remove the back panel until such time as the module is to be replaced.
摘要:
A low contrast measurement apparatus for electronically measuring video signal modulation under low contrast scene conditions. The measurement apparatus utilizes a low contrast periodic optical bar chart in conjunction with a filter-integrator processor to measure very low contrast ratios.The filter-integrator processor contains a filter which is tuned to the corresponding fundamental frequency of the bar chart, thereby reducing the noise bandwidth and consequently improving the signal-to-noise ratio. The filtered signal is integrated over one whole picture frame which results in an improved signal to noise ratio. The integrated output of the filtered video signal constitutes a linearly increasing ramp with a period equal to the frame time and whose height is proportional to the amplitude of the periodic signal.
摘要:
A method and apparatus for generating a complex visual pattern in conjunction with a two dimensional display having X and Y deflection means. The method comprises deriving two signals for application to the deflection means, each consisting of a DC component and an AC component. Each of these components contains information which is derived from the combination of one or more audio frequency sources.Also, a method of encoding n number of audio frequency sources for separate and coherent two dimensional display of each source and of the amplitude, frequency and phase relationships between and among them. The two dimensional display surface is represented as a circular polar coordinate system where each audio source causes displacement of the trace toward a point around the perimeter of the display area. The polar coordinates of each point are trigonometrically translated to cartesian coordinates which determine the amplitudes of the signals to be applied to the X and Y deflection means.Several forms of two dimensional display for use with the present invention are shown, one involving the instant conversion of a color television to function either in conjunction with the present invention or as a normal receiver, and the other producing a large scale color projection using a tunable dye laser in conjunction with an electro-optical deflection system, and a specially constructed screen.
摘要:
A novel system is provided for detecting the presence of a characteristic feature on an illuminated surface of an object when used in conjunction with known electro-optical systems for determining the position of the centroid of the outline of the object with relation to the supporting surface and the rotation of the object relative to the rotational orientation of a test part. The surface is illuminated at an angle that enhances the contrast of the characteristic feature while using a vidicon-type image converter tube which scans the field which includes the object. The location, with respect to the centroid, of a circular window area encompassing the characteristic feature and the radius of the circular window are determined utilizing a television monitor connected to the vidicon. Next the operator determines and stores a pair of separated threshold levels which control a level detector which compares the vidicon output to the threshold level to derive a binary output so that one of the threshold levels separates the white area in the window area from the gray-black area while the other threshold level separates the black area in the window area from the white-grey areas. The system then analyzes and stores the relative amounts of white, gray and black areas in the window as a signature signal representative of the characteristic feature of the surface. Following this "teach" phase, the system may be used to determine whether a subsequent object contains a feature which correlates well with the characteristic of the test part by analyzing the output of the vidicon at the window for both threshold levels and determining the correlation between these levels and the values obtained during the teach phase.
摘要:
Apparatus is described for implementing rebound circuitry in a video game simulating hockey or the like. Means are provided to detect presence of a game object at an upper or lower boundary. Further means are provided to act in response of said detection for moving the game object marker away from the boundary. The rebounding game object diminishes in velocity for a predetermined time after incidence with a boundary.
摘要:
A method of and apparatus for testing a two dimensional pattern uses a pair of pick-up devices for scanning a reference pattern and the pattern to be tested. The reference pattern is modified relative to the test pattern and includes three types of pattern traces, i.e. narrow black traces, narrow bright traces and intermediate wide grey traces. The pattern is tested by means of the narrow traces only thereby minimizing positioning and scanning problems.
摘要:
An apparatus for automatic measurement of the video signal-to-noise ratio in a television channel comprises a video signal pre-processing unit, the inputs thereof being connected to the outputs of a unit measuring the peak-to-peak amplitude of the video signal, a sync separator and a control unit respectively. Another output of the sync separator is connected to a series combination of the following units controlled by the control unit; a short pulse shaper, a pulse-amplitude modulator, a switch, a pulse stretcher, a means for converting the pulse amplitude to a number of pulses, a means for producing the differences between samples, an analyzer of the differences between samples, a digital function generator and a digital display. The output of the means for producing the differences between samples is connected to one of the inputs of the unit measuring the peak-to-peak amplitude of the video signal, another input of which is coupled by way of the video signal pre-processing unit to the input of the pulse-amplitude modulator, another output of the unit measuring the peak-to-peak amplitude of the video signal being connected to one in the inputs of the switch.
摘要:
The disclosed apparatus for evaluation of characteristics of the images of objects consists of a delay unit connected to the output of a video signal discriminator, wherein the square pulses coming from the output of the discriminator of the video signal are delayed for a time necessary for effecting synchronous coincidence of the respective square pulses of the current and delayed lines of the raster of the scanning unit. The apparatus further includes a synchronous coincidence unit and a synchronous subtraction unit, each one of them being connected by its respective input to the output of the video signal discriminator both directly and through the delay unit. The output of the synchronous subtraction unit is connected to a gate connected to the output of the generator of quantizing pulses. The outputs of the synchronous coincidence unit and of the synchronous subtraction unit are connected to a perimeter computation unit directly, while the output of the synchronous subtraction unit is additionally connected to the perimeter computation unit through a gate.
摘要:
A technique for comparing master parts with replicas to determine differences in shapes or sizes, is disclosed, which uses interferometric techniques as disclosed. A television camera is used to scan the pattern established by illuminating the subject with a set of optical fringes. An objective lens images these on a transmission line grating. A television camera scans the transmission grating. The spatial frequencies of the subject fringes and of the grating are especially selected so that the camera can not resolve either of them but can resolve their difference. As a result, the output signals of the camera represent a contour map of the object placed on a low frequency spatial carrier, but yet, the measurement sensitivity is still determined by the spatial frequency of the subject fringes.