RU2105994C1 - Range finder - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: range finder increases accuracy of determination of range without enlargement of base due to insertion of two units of fiber-optical converters with elongated lines, two auxiliary television sensors, second sweep generator, counter, permanent storage and adder. Units of fiber-optical converters are built into screens of proper first and second videocontrol devices which optical outputs are connected through first and second units of fiber-optical converters to optical inputs of first and second auxiliary television sensors which outputs are correspondingly connected to inputs of first and second selectors of amplitude and duration and which inputs are coupled to output of second sweep generator also connected through counter. Permanent storage is connected to second input of adder which first input and output are correspondingly connected to output of measurement device and to input of range indicator. EFFECT: increased accuracy of determination of range. 2 dwg

Description

 The invention relates to television technology and can be used in search and tracking systems.

 Known television range finder, which is a television device for determining range (patent 2010156, author Chasovskaya A.A.).

 It can measure range by moving the television sensor to a base distance of up to 50 cm. The range is proportional to the movement of the television sensor. However, the device has a long range determination time.

 Known range finder, which is a television device for determining the range (patent 2013025, author Chasovskaya A.A.) In it, when using two television sensors spaced at the base distance, the distance to the object is determined. Line and frame synchronization of the transmitting television tubes is carried out using a common sweep generator. The selection of signals according to their characteristics is carried out using selectors in amplitude and duration.

 The range is determined in the measuring device, which measures the temporal mismatch between the leading or trailing edges of the two signals, in the same way as in the range converter. Range is displayed on the range indicator. Observation of the object can be carried out using two video monitoring devices having a common synchronization with television sensors supplied from a scan generator. However, to increase the accuracy of determining the range, it is necessary to increase the base. Using the proposed device increases the accuracy of determining the range without increasing the base. This is achieved by introducing two blocks of fiber-optic converters with elongated strings, two auxiliary strings, two auxiliary television sensors, a second sweep generator, counter, read-only memory and adder. In this case, the blocks of fiber-optic converters with elongated rows are integrated into the screens of the corresponding first and second video monitoring devices, the optical outputs of which, respectively, through the first and second blocks of fiber-optic converters with elongated rows are connected to the optical inputs of the first and second auxiliary television sensors, the inputs of which are connected to the inputs of the first and the second selectors in amplitude and duration, and the inputs are connected to the outputs of the second generator once ertki connected also through the counter, a read only memory to the second input of the adder, the first input and the input of which is respectively connected to the output of the measuring device and to the input range of the indicator.

 In FIG. 1 and the following notation is used in the text: 1, 2 television sensors; 3 sweep generator; 4, 5 video monitoring devices; 6, 7 - blocks of fiber optic converters with elongated strings; 8, 9 - auxiliary television sensors; 10 sweep generator; 11, 12 - selectors in amplitude and duration; 13 measuring device; 14 - adder; 15 read-only memory; 16 counter; 17 - range indicator.

 In this case, the output of the sweep generator 3 is connected to the inputs of rigidly interconnected television sensors 1 and 2 and to the inputs of the video monitoring devices 4 and 5, the optical outputs of which are respectively connected through the blocks of fiber-optic converters with elongated lines 6 and 7 to the optical inputs of the auxiliary television sensors 8 and 9, the outputs of which are connected to the respective inputs of the selectors in amplitude and duration 11, 12, and the outputs are connected to the output of the sweep generator 10, also connected through a counter 16, toyannoe storage device 15 to the second input of the adder 14, the output and the first input of which are respectively connected to the input range of the indicator 17 and the output of the measuring device 13 having first and second inputs connected to respective outputs of the selector in the amplitude and duration of 11 and 12.

 The operation of the device is as follows.

 Using two television sensors 1 and 2, equally directed rigidly interconnected and spaced at the base distance (for example, 0.5 m), light energy is converted into electrical signals. Synchronization of sweeps of television sensors is carried out using a sweep generator 3. Electrical signals from the outputs of television sensors 1 and 2 are fed to video monitoring devices 4 and 5, where objects in the field of view of the corresponding television sensors are displayed. Sweeps of video control devices are also synchronized from a sweep generator 3. Component blocks of fiber-optic converters with extended lines 6 and 7 are built into the screens of video control devices. Their design is similar to the design of fiber-optic converters that decompose an extended line into a number of lines ("Television systems for aircraft, Barsukov, published by the Ministry of Defense, 1979).

 An extended line is decomposed into a certain number of lines (for example, 20). Their approximate location is shown in figure 2, where elongated lines 18 and 19 in the amount of 5 pieces are embedded in the screens of video monitoring devices 4 and 5. Elongated lines intersect the displays of objects 20 and 21. If each elongated line is decomposed into 20 lines of decomposition, which is five elongated lines, the total number of decomposition lines will be 100. These decomposition lines are built into the corresponding lenses of the auxiliary television sensors 8 and 9. As a result, the divergence between the displays from the same object increases. The synchronization of the transmitting tubes is general and is carried out from the sweep generator 10. As a result, the temporary mismatch between the leading or trailing edges of two signals from the same object coming from the television sensors 8 and 9, respectively, also increases by 20 times. The video signals are distinguished by the duration and level characteristic of the expected object in the respective selectors by the duration and amplitude 11 and 12. The temporal mismatch between the video signals is determined in the measuring device 13 in the same way as in the range converter.

 In the process of alignment to the control object having a circular shape, achieve the same duration of two video signals from this object by shifting the corresponding elongated lines 18 and 19 (figure 2) up or down, as well as their horizontal installation. When this rotary television sensors 1 and 2 achieve the displacement of the displays from the control object to the right or left.

 Next, systematic corrections arising due to a possible error in the execution of the decomposition are determined using the counter 16, read-only memory 15 and the adder 14. The counter considers horizontal sync pulses coming from the scan generator 10 to a value equal to the number of decomposition lines (for example, up to 100) . Next is set to its original state. Each value of counter 16 in read-only memory 15 corresponds to a wired defined systematic correction, which is determined by setting the mappings from the control object sequentially for each line of decomposition in a certain place of the field of view by turning the television sensors 1 and 2. For example, with 100 lines of decomposition of such places should be 100, which corresponds to 100 different positions of the control object in the field of view of television sensors 1 and 2. The value of the corresponding systematic pop avki coming from the permanent storage device 15, composed in the adder 14 to the value of the time difference between the two video signals coming from the measuring device 13. From the output of adder information comes in-range indicator for display. The temporal mismatch between the two signals will be inversely proportional to the range. It is displayed on the range indicator.

We give examples of specific performance. Suppose that at a base of 0.5 m and angles of field of view of the lenses of television sensors 1 and 2 equal to 1 ^o , the object is at a distance of 20 km. Then, with the number of lines equal to 20, the temporary mismatch between the two video signals, provided that the central axes of the lenses are parallel, will be 1.5 μs. Accordingly, for ranges of 10 and 5 km it will be 3 and 6 μs.

 The proposed device can be used in the process of searching and tracking moving and stationary objects that are in the field of view of television sensors. At the same time, without increasing the base, it is possible to increase the field of view (without reducing the accuracy of determining the range). The range finder can be used in traffic control systems for flight safety and navigation, as well as on moving objects where there is no way to increase the base.

Claims (1)

 The range finder, consisting of a television sensor, a sweep generator, two signal selectors and a range indicator, where the output of the sweep generator is connected to the input of a television sensor, characterized in that a second television sensor is introduced, rigidly connected to the first, each of the two signal selectors is made in the form of a selector in terms of amplitude and duration, as well as two video monitoring devices, two fiber-optic converters with elongated strings, two auxiliary television sensors, and a second generator sweep, measuring device, adder, read-only memory and counter, while the blocks of fiber-optic converters with elongated lines are built into the screens of the corresponding first and second video monitoring devices, the first inputs of which are connected to the corresponding outputs of the first and second television sensors, the second inputs are together with the input of the second television sensor are connected to the output of the first sweep generator, and the optical outputs of the first and second video monitoring devices are connected respectively, through the aforementioned first and second blocks of fiber-optic converters with elongated rows with optical inputs of the first and second auxiliary television sensors, the inputs of which are connected to the output of the second scan generator, and the outputs, respectively, in amplitude and duration are connected to the first and second the second inputs of the measuring device, the output of which is connected to the first input of the adder having an output connected to the input of the range indicator, and the second input, soy dinned through a read-only memory and counter with said output of the second sweep generator.

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