CN2852089Y - Digital reading device of analog pressure gauge - Google Patents

Abstract

A digital reading device of analog pressure gauge is processed like this: an analog signal of the dial picture of the analog pressure gauge via a camera and then through an analogue-to-digital converter and a periodical setting module conveys a digit signal to an image collecting device; the image collecting device conveys the collecting image digit signal via a data interface to a computer; the computer conducts a binarization processing to the images digit signal; after the processing, the hand position, the graduation position and the measuring range of the analog pressure gauge are settled down; then the off-scale reading of the pressure gauge is calculated; finally, the computer conveys the off-scale reading digit signal of the pressure gauge to a digital displayer. The utility model has advantages of simple structure, easy mounting, reliable operation and low cost, so the device is suitable to the technical innovation of the large-scale factories and mines; moreover, to conduct automatically reading and displaying the data of the analog pressure gauge can raise the work efficiency and increase the security and reliability of the equipment operating.

Description

Simulated pressure table digital reading device

Technical field

The utility model belongs to the pressure gauge reading technology, particularly a kind of simulated pressure table digital reading device.

Background technology

At present, a lot of simulated pressure tables still rely on manual metering, and this meter reading method efficient is low, waste time and energy, and influenced by human factor during meter reading, and the accuracy of reading is relatively poor.Especially the tensimeter in some old apparatuss nearly all is the simulation table, all needs manually to carry out reading, and not only Cai Yang cycle is subjected to artificial factors, and the accuracy of meter reading also is subjected to the influence of naked eyes vision.Though it is very serious that the reading of simulated pressure table is subjected to artificial factors, but because in one period, a lot of main equipments all can not obtain updating, the simulated pressure table still needs to be continued to use, in this case, need reading device simple in structure, that accuracy is high, with low cost, easy to operate of design, the reading of simulation table is converted into digital reading and carries out numeral demonstration.

The utility model content

The purpose of this utility model is to have time-consuming, effort, technical matters such as inaccurate in the large-scale factories and miness in the existing equipment in the tensimeter data read in order to solve, a kind of simple in structure, easy for installation, reliable operation, simulated pressure table digital reading device that cost is low are provided, the data of simulated pressure table are read and numeral shows automatically.

The utility model comprises the simulated pressure table, camera, analog to digital converter, the cycle setting module, image acquisition device, data-interface, computing machine, digital indicator, the simulating signal of simulated pressure table dial plate image, through analog to digital converter and cycle setting module digital signal is flowed to image acquisition device by camera, image acquisition device flows to computing machine with the image digital signal of gathering by data-interface, computing machine carries out binary conversion treatment to image digital signal, after binaryzation, determine the indicator position, simulated pressure table scale position and range, calculate manometric reading then, computing machine flows to digital indicator with manometric reading digital signal, by digital indicator display simulation tensimeter digital reading.

The utlity model has simple in structure, easy for installation, reliable operation, low cost and other advantages, be fit to large-scale factories and miness to technological transformation, the data of simulated pressure table are read and numeral shows automatically, increase work efficiency and the security and the reliability of equipment work.

Description of drawings

Fig. 1 is the structured flowchart of this device;

Among the figure: 1 simulated pressure table, 2 cameras, 3 analog to digital converters, 4 cycle setting modules, 5 image acquisition devices, 6 data-interfaces, 7 computing machines, 8 digital indicators.

Embodiment

Further specify the organization plan of the present utility model and the course of work in conjunction with example

As shown in Figure 1, simulated pressure table digital reading device comprises simulated pressure table 1, camera 2, analog to digital converter 3, cycle setting module 4, image acquisition device 5, data-interface 6, computing machine 7, digital indicator 8.At first camera 2 is fixed on the appropriate location, can clearly photographs the dial plate image of simulated pressure table 1.Give analog to digital converter 3 by camera 2 with simulated pressure table 1 dial plate picture signal, analog to digital converter 3 is converted to image digital signal with analog picture signal and flows to image acquisition device 5 through cycle setting module 4, cycle setting module 4 is set the sampling period of image, image acquisition device 5 flows to computing machine 7 with the image digital signal of gathering through data-interface 6, computing machine 7 carries out binary conversion treatment with image digital signal, indicator scale gray-scale value be 0 dial plate background gray levels be 1 or indicator scale gray-scale value be that 1 dial plate background gray levels is 0, here we suppose that indicator scale gray-scale value is 1, image information includes only 0 and 1 two gray-scale value after the binary conversion treatment, be convenient to extract the information of indicator and scale position, utilize the image information after the binary conversion treatment to determine the indicator position then, scale position and range.Gray scale by the center of circle is the position that 1 linear zonation just can be determined indicator, with the position parameter of determining indicator by the straight line and the angle between the indicator of the center of circle and zero graduation.The range of specified pressure table and unit scale value are known, in the image of scale after binaryzation demonstration is arranged also, behind the extraction scale characteristic information, calculate the angle that two adjacent scales are differed, be the angle of unit scale correspondence on dial plate, calculate the angle θ between indicator and the zero graduation ₁, the pairing angle θ of unit scale ₂, range is known, and the force value of the unit's of establishing scale correspondence is δ, and then can calculate and photograph the simulation pressure is that the force value ω that shows is $\mathrm{\ω}=\mathrm{\δ}\×\left(\frac{{\mathrm{\θ}}_1}{{\mathrm{\θ}}_2}\right),$ At last, the digital reading of simulated pressure table 1 is shown by digital indicator 8.

Claims (1)

1, simulated pressure table digital reading device, it is characterized in that, comprise the simulated pressure table, camera, analog to digital converter, the cycle setting module, image acquisition device, data-interface, computing machine, digital indicator, the simulating signal of simulated pressure table dial plate image, through analog to digital converter and cycle setting module digital signal is flowed to image acquisition device by camera, image acquisition device flows to computing machine with the image digital signal of gathering by data-interface, computing machine flows to digital indicator with manometric reading digital signal, by digital indicator display simulation tensimeter digital reading.