CN106646493B

CN106646493B - Method for determining amplification factor of infrared signal of infrared measuring device

Info

Publication number: CN106646493B
Application number: CN201510724840.7A
Authority: CN
Inventors: 于海洋; 李德祥
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2020-12-29
Anticipated expiration: 2035-10-29
Also published as: CN106646493A

Abstract

The invention relates to the technical field of measurement of a bottle-shaped body, and provides a method for determining an amplification factor of an infrared signal of an infrared measurement device, which comprises the following steps: step 1, transmitting an infrared signal to a preset position; step 2, processing the returned infrared signal according to a set amplification factor; step 3, comparing the returned infrared signal with a threshold value, and determining whether a bottle-shaped body exists according to a comparison result; step 4, executing the steps 1, 2 and 3 under different states of placing the bottle-shaped bodies at different distances from the infrared measuring device; step 5, according to the result determined in the step 4, increasing or decreasing the amplification factor; and 6, repeating the steps 1-5 until the amplification factor is determined. The technical problem of inaccurate infrared measurement caused by inaccurate measurement of the amplification factor of an infrared signal in the infrared detection process in the prior art is solved, and the bottle-shaped body with higher precision can be detected by a simple and cheaper device.

Description

Method for determining amplification factor of infrared signal of infrared measuring device

Technical Field

The invention relates to the technical field of measurement of a bottle-shaped body, in particular to a method for determining an amplification factor of an infrared signal of an infrared measurement device.

Background

At present, the existing methods for realizing wine cabinet wine positioning mainly comprise methods such as pressure sensing, a pressure switch circuit and infrared distance measurement, wherein the method adopting the infrared distance measurement is simple and has high realization degree, but a dark object can absorb infrared rays, so that the infrared distance measurement precision is influenced, and whether wine exists at a certain position cannot be accurately judged.

Disclosure of Invention

The invention aims to solve the technical problem that the detection precision of the infrared detection equipment in the prior art on the bottle-shaped body is not high.

In order to solve the above problems, the present invention discloses a method for determining an amplification factor of an infrared signal of an infrared measurement apparatus, comprising:

step 1, transmitting an infrared signal to a preset position;

step 2, processing the returned infrared signal according to a set amplification factor;

step 3, comparing the returned infrared signal with a threshold range, and determining whether a bottle-shaped body exists according to a comparison result;

step 4, executing the steps 1, 2 and 3 under different states of placing the bottle-shaped bodies at different distances from the infrared measuring device;

step 5, according to the result determined in the step 4, increasing or decreasing the amplification factor;

and 6, repeating the steps 1-5 until the amplification factor is determined.

Further, the step 5 judges whether the measurement result falls within the threshold range by moving the bottle-shaped body from the minimum measurement distance to the maximum measurement distance, and if the measurement value of the bottle-shaped body at the minimum measurement distance does not fall within the threshold range, the amplification factor is increased;

if the measured value of the bottle at the maximum measurement distance does not fall within the threshold range, the amplification factor is decreased.

Compared with the prior art, the invention has the following advantages:

according to the invention, the AD sampling method is utilized to amplify the weaker light intensity signal reflected by the dark object and suppress the strong signal, so that the measured light intensity reaches the light intensity reflected when wine is available, whether the wine is available at the position can be accurately judged, the infrared distance measurement precision is improved, and the distance of the wine is prolonged.

Drawings

FIG. 1 is a schematic flow diagram of a preferred embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, the present invention discloses a method for determining an amplification factor of an infrared signal of an infrared measurement apparatus, comprising:

s1, emitting infrared signals to a preset position;

s2, processing the returned infrared signal according to the set amplification factor;

s3, comparing the returned infrared signal with a threshold range, and determining whether a bottle-shaped body exists according to the comparison result;

s4, executing the above S1, S2 and S3 under different states of placing the bottle-shaped body at different distances from the infrared measuring device;

s5, according to the determined result of S4, increasing or decreasing the amplification factor;

and S6, repeating the steps from S1 to S5 until the amplification factor is determined.

In the preferred embodiment 1, the infrared signal emitted in step S1 is measured as S1, and the initial infrared amount in the environment is measured as S0;

it can be known that the amount s of the infrared signal emitted by the infrared signal emitter is s1-s 0;

in step S2, the infrared signal is processed by converting the analog signal of the measured infrared signal into a digital signal through analog-to-digital conversion, where a specific voltage amplitude V and a functional relationship in the analog-to-digital conversion process are set as fAD;

the digital signal after analog-to-digital conversion is: v ═ fAD (s1-s 0);

then the infrared signal is amplified according to the developed coefficient set by the amplifier circuit,

obtaining: the amplified voltage amplitude V' is k.V;

in step S3, the returned infrared signal is compared with a threshold range, and it is determined whether the amplified voltage amplitude V' falls within a preset bottle detection decision interval [ Vmin, Vmax ];

if V' falls in the range of the judgment interval [ Vmin, Vmax ], judging that a bottle-shaped body exists;

if V' falls outside the range of the judgment interval [ Vmin, Vmax ], judging that no bottle-shaped body exists;

the bottle-shaped body is preset, and the bottle-shaped body is placed at a position which accords with the detection range of the infrared detection device when being set, so that when V' falls in the range of the judgment interval [ Vmin, Vmax ], the value of the amplification factor k is proper in size;

if V' falls outside the range of the decision interval [ Vmin, Vmax ], the value of the amplification factor k at this time is not appropriate, and the value of the amplification factor k should be adjusted.

In some illustrative embodiments, the step S5 judges whether the measurement result falls within a threshold range by moving the bottle-shaped body from the minimum measurement distance to the maximum measurement distance, and if the measurement value of the bottle-shaped body at the minimum measurement distance does not fall within the threshold range, the amplification factor is increased;

In step S5, when the amplification factor k is adjusted,

if V' < Vmin, the numerical value of the amplification factor k is smaller, and the numerical value of k should be increased;

if V' > Vmax indicates that the value of the amplification factor k is larger, the value of k should be reduced.

The method for determining the amplification factor of the infrared signal of the infrared measurement device provided by the invention is described in detail above, and the principle and the implementation mode of the invention are explained in the text by applying specific examples, and the description of the above examples is only used for helping to understand the idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the embodiment of the present invention, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification should not be construed as a limitation to the embodiment of the present invention.

Claims

1. A method for determining an amplification factor of an infrared signal of an infrared measurement device, comprising:

step 1, transmitting an infrared signal to a preset position;

and 6, repeating the steps 1-5 until the amplification factor is determined.

2. The method of claim 1, wherein step 5 determines whether the measurement result falls within a threshold range by moving the bottle-shaped body from a minimum measurement distance to a maximum measurement distance, and if the measurement value of the bottle-shaped body at the minimum measurement distance does not fall within the threshold range, the amplification factor is increased;