RU166565U1 - OPTICAL-ELECTRONIC DEVICE FOR PARALLEL CONTROL OF INDICATIONS OF THE INSTRUMENT PANEL - Google Patents

Abstract

Optoelectronic device for parallel control of instrument panel readings, characterized in that it includes the following elements: digital video camera controller, random access memory, block for determining the readings of direction indicators, block for determining readings of a liquid crystal display, block for determining readings of light indicators, a block of keys, a block liquid crystal display, input-output controller, signal generation units, key decoder, address and control bus, data bus.

Description

This utility model relates to the field of physics, namely to devices for measurements and tests, in particular to devices for testing and calibration of devices for measuring electrical and magnetic quantities.

A DEVICE FOR AUTOMATIC TESTING OF ARROW MEASURING INSTRUMENTS is known from the existing level of technology (Patent RU 2503967 C1, application. 05.22.12; publ. 10.01.14). The disadvantage of this technical solution is that it can only be used to verify dial gauges and cannot be used to determine the readings of a liquid crystal display, to determine the readings of light indicators. Also, the DEVICE FOR AUTOMATIC VERIFICATION OF ARROW MEASURING INSTRUMENTS (Patent RU 2503967 C1, application. May 22, 12; publ. January 10, 2014) has a low speed of calculating the indication of a dial indicator in connection with the operation of subtraction and binarization of images in one hardware unit.

The problem to which the claimed utility model is directed is to reduce the time of technical diagnostics of the instrument panel, consisting of several indicators, namely direction indicators, indications of a liquid crystal display, indications of light indicators.

This problem is solved due to the fact that the claimed utility model includes the following hardware units: controller of a digital video camera (KVSK), random access memory (RAM), a unit for determining the readings of direction indicators (BOPSTI), a unit for determining readings of a liquid crystal display (BOPZhKD), light indicator reading unit (BOPSvI), key block (BK), liquid crystal display unit (BZHKD), input-output controller (HWV), signal generation units (BHS 1, BHS N), [key decoder (DShK), address busControl (SHA / Y), a data bus (SD). Hardware units that implement the parallel execution of the above operations are implemented on one FPGA (programmable logic integrated circuit). An external digital video camera is connected to the controller of the digital video camera, fixed fixed on the technical diagnostic stand. A digital video camera is not an integral part of the claimed utility model.

The technical result provided by the given set of features is the parallel monitoring of the readings of several indicators, namely dial indicators, readings of a liquid crystal display, readings of light indicators.

The essence of the claimed utility model is illustrated by drawings, which are reflected in FIG. 1 structural and functional diagram of an optoelectronic device for parallel monitoring of instrument panel readings.

To achieve a technical result, the device operates as follows.

KVSK receives video information in the form of a sequence of image frames of the instrument panel (PP) with a digital video camera connected to the KVSK, fixed motionless on the technical diagnostic stand.

The blocks for determining indicator readings (BOPSTI, BOPZHKD, BOPSvI) process the images of indicators in accordance with hardware-oriented algorithms, recognizing instrument panel readings.

The control controller is connected to the ША / У and ШД and supplies control signals to a set of GHS, generating signals similar to the signals generated by the sensors, each GHS is a separate printed circuit board, which is connected to the ША / У and ШД, and which contains a trigger to store the operating mode. The BGS is selected using the control controller by setting the logical combination encoding the operating mode of a particular BGS on the SHA / U. To ensure the generation of signals, a reference voltage of +13.5 V, +5 V and a common wire Gnd are supplied to each GHS. The outputs of each BGS are connected to a signal bus (SS), which is electrically connected to the external connector of the instrument panel.

BC serves to control the device. BZHKD performs the function of displaying reference information about the process of monitoring readings. A personal computer (PC) is connected to the HVAC using the USB interface to set the operation mode of the device and does not require a connection during the working cycles of technical diagnostics.

DShK is used to automatically select the display mode of the automatic transmission liquid crystal indicator.

A distinctive feature of the functioning of the device is the parallel execution of operations by using independent hardware units for determining the indicators, which made it possible to implement parallel monitoring of the readings of several indicators of the instrument panel.

Distinctive features of BOPSTI are the calculation of the arctangent function of the argument based on table values stored in a non-volatile memory unit, as well as the operation of subtracting and binarizing images in separate hardware units, which together allows to reduce the calculation time of the arrow indicator.

The LCD unit for determining the readings of a liquid crystal display (BFLC) is a complete computing module that performs the functions of analyzing an image of a liquid crystal display to determine readings, and contains an interpolation unit, a binarization unit, a partition unit, a template comparator, and a template memory.

The block works as follows.

First, in the interpolation block, the image size of the liquid crystal display is changed, then in the binarization block the image is reduced to 1 bit / pixel by comparing the value of each pixel in the image with a threshold value and adopting a new pixel value from the set {0, 1}. After that, the splitting unit splits the image of the liquid crystal display into rectangular areas of various symbols, consisting of segment indicators. The value of each symbol is determined in the template comparator based on the comparison of the recognized symbol with the symbols from the set of ready-made templates contained in the template memory by the criterion of maximum pixel-by-pixel identity of two images. At the last stage, the recognition results are transmitted via the SD to the control controller, which determines the current display mode based on the analysis of the set of recognized characters, as well as calculates the numerical value of the readings of the liquid crystal display.

The block for determining the indications of light indicators (BOPSvI) is a complete computing module that performs the functions of analyzing the image of the light indicator in order to determine the readings, and contains an interpolation unit, a binarization unit, a template comparator and template memory.

The block works as follows.

First, in the interpolation block, the image size of the light indicator is changed, then in the binarization block the image is brought to a view of 1 bit / pixel by comparing the value of each pixel in the image with a threshold value and adopting a new pixel value from the set {0, 1}. The indicator of operability of the light indicator is determined in the template comparator based on a comparison of the recognized image with images from a set of ready-made templates by the criterion of maximum pixel-by-pixel identity of two images. At the last stage, the recognition results are transmitted via SD to the control controller, which determines the current display mode based on a priori information about the display modes of the instrument panel.

The hardware implementation of signal generation units (GHS) in the form of complete boards that function independently of each other has the advantage of parallel generation of signals emulating sensors, which in turn allows the simultaneous monitoring of several indicators in accordance with the developed mathematical model and the parallel control method dashboard readings.

The novelty of the structural-functional diagram of the developed optical-electronic device is the introduction of parallel-functioning hardware units for determining the readings of arrow indicators, a liquid crystal display, light indicators, communications between the units, which allows the device to be implemented using a programmable logic integrated circuit, as well as the introduction of signal generation units that function independently of each other, which together allows us to solve the problem of reducing the time of technical th diagnostic instrument panel through the implementation of a parallel control readings of several indicators.

Claims (1)

Optoelectronic device for parallel control of instrument panel readings, characterized in that it includes the following elements: digital video camera controller, random access memory, block for determining the readings of direction indicators, block for determining readings of a liquid crystal display, block for determining readings of light indicators, block of keys, block liquid crystal display, input-output controller, signal generation units, key decoder, address and control bus, data bus.

Images