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

Abstract

Analog pressure gauge digital reading device, the analog signal of the analog pressure gauge dial image is transmitted to the image collector through the camera through the analog-to-digital converter and the cycle setting module, and the image collector transmits the collected image digital signal through the data interface To the computer, the computer performs binarization processing on the image digital signal, determines the position of the gauge needle, the scale position and range of the analog pressure gauge after binarization, and then calculates the reading of the pressure gauge, and the computer sends the digital signal of the reading of the pressure gauge to the digital Display, the utility model has the advantages of simple structure, convenient installation, reliable operation, low cost, etc. It is suitable for technological transformation of large-scale factories and mines, and can automatically read and digitally display the data of analog pressure gauges, so as to improve work efficiency and safety of equipment work and reliability.

Description

Analog pressure gauge digital readout device

technical field

The utility model belongs to the pressure gauge reading technology, in particular to a digital reading device for an analog pressure gauge.

Background technique

At present, many analog pressure gauges still rely on manual meter reading, which is inefficient, time-consuming and labor-intensive, and is affected by human factors during meter reading, resulting in poor reading accuracy. In particular, the pressure gauges in some old equipment are almost all analog gauges, which require manual reading. Not only is the sampling cycle restricted by human factors, but the accuracy of gauge reading is also affected by naked eyes. Although the readings of analog pressure gauges are severely restricted by human factors, because many large-scale equipment cannot be replaced within a period of time, analog pressure gauges still need to be used continuously. In this case, it is necessary to design a simple structure , high accuracy, low cost, and easy-to-operate reading device, which converts the reading of the analog meter into a digital reading and displays it digitally.

Utility model content

The purpose of this utility model is to solve the technical problems of time-consuming, laborious and inaccurate reading of pressure gauge data in existing equipment in large-scale factories and mines, and to provide an analog pressure gauge with simple structure, convenient installation, reliable operation and low cost The digital reading device can automatically read and digitally display the data of the analog pressure gauge.

The utility model comprises an analog pressure gauge, a camera, an analog-to-digital converter, a cycle setting module, an image collector, a data interface, a computer, a digital display, and the analog signal of the dial image of the analog pressure gauge passes through the camera through the analog-to-digital converter and the cycle The setting module sends the digital signal to the image collector, and the image collector sends the collected image digital signal to the computer through the data interface, and the computer performs binarization processing on the image digital signal, and determines the needle position and analog pressure after binarization Gauge scale position and range, and then calculate the reading of the pressure gauge, the computer sends the digital signal of the reading of the pressure gauge to the digital display, and the digital display displays the digital reading of the analog pressure gauge.

The utility model has the advantages of simple structure, convenient installation, reliable operation, low cost, etc. It is suitable for technical transformation of large-scale factories and mines, and can automatically read and digitally display the data of the analog pressure gauge, so as to improve the working efficiency and the safety and reliability of equipment work. sex.

Description of drawings

Fig. 1 is the block diagram of this device;

In the figure: 1 analog pressure gauge, 2 camera, 3 analog-to-digital converter, 4 cycle setting module, 5 image collector, 6 data interface, 7 computer, 8 digital display.

Detailed ways

Further illustrate the structural scheme and working process of the utility model in conjunction with examples

As shown in FIG. 1 , the analog pressure gauge digital reading device includes an analog pressure gauge 1 , a camera 2 , an analog-to-digital converter 3 , a cycle setting module 4 , an image collector 5 , a data interface 6 , a computer 7 , and a digital display 8 . Firstly, the camera 2 is fixed at a proper position, and the dial image of the analog pressure gauge 1 can be clearly captured. The analog pressure gauge 1 dial image signal is sent to the analog-to-digital converter 3 through the camera 2, and the analog-to-digital converter 3 converts the analog image signal into an image digital signal and sends it to the image collector 5 through the cycle setting module 4, and the cycle setting module 4 Set the sampling cycle of the image, the image collector 5 sends the collected image digital signal to the computer 7 through the data interface 6, and the computer 7 performs binary processing on the image digital signal, and the gray value of the scale of the dial is 0. The gray scale of the background of the dial The value is 1 or the gray value of the scale of the dial is 1. The gray value of the background of the dial is 0. Here we assume that the gray value of the scale of the dial is 1. After binarization, the image information only includes two gray values of 0 and 1, which is easy to extract The position information of the pointer and the scale, and then use the image information after binary processing to determine the position of the pointer, the position of the scale and the range. The position of the pointer can be determined by the linear distribution band with a gray level of 1 at the center of the circle, so that the position parameter of the pointer can be determined by the angle between the center of the circle and the straight line of the zero scale and the pointer. The range and unit scale value of a specific pressure gauge are known, and the scale is also displayed in the binarized image. After extracting the scale feature information, the angle difference between two adjacent scales is calculated, that is, the unit scale corresponds to the dial on the dial. Calculate the angle θ ₁ between the needle and the zero scale, and the angle θ ₂ corresponding to the unit scale. If the range is known, if the pressure value corresponding to the unit scale is δ, then it can be calculated that the simulated pressure is the gauge. The pressure value ω is $\mathrm{\ω}=\mathrm{\δ}\×\left(\frac{{\mathrm{\θ}}_1}{{\mathrm{\θ}}_2}\right),$ Finally, the digital reading of the analog pressure gauge 1 is displayed by a digital display 8 .

Claims (1)

1. The analog pressure gauge digital reading device is characterized in that it includes an analog pressure gauge, a camera, an analog-to-digital converter, a cycle setting module, an image collector, a data interface, a computer, a digital display, and an analog signal of an analog pressure gauge dial image , the digital signal is sent to the image collector through the camera through the analog-to-digital converter and the cycle setting module, and the image collector sends the collected image digital signal to the computer through the data interface, and the computer sends the reading digital signal of the pressure gauge to the digital display , the digital reading of the analog pressure gauge is displayed by the digital display.