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Temperature measuring method and device, and product using the same

A temperature measuring device and temperature-sensitive technology, applied in the field of non-contact temperature measurement, can solve the problems of difficult measurement, large error, slowness, etc., and achieve the effect of simple and practical structure

Active Publication Date: 2017-02-15
广东中实源创科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the temperature change process of the object is very slow, the change of the magnetic permeability of the ferromagnet (that is, the change of the magnetic induction intensity of the magnetic temperature sensing element) caused by the temperature change is also very slow. This slowly changing magnetic induction intensity reflects The current or voltage change is extremely weak, so it is very difficult to measure, and the error is very large
Therefore, this solution is also not suitable for daily life applications.

Method used

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  • Temperature measuring method and device, and product using the same
  • Temperature measuring method and device, and product using the same
  • Temperature measuring method and device, and product using the same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0041] This embodiment discloses a temperature measurement method, which uses the resonance principle and the combination of the magnetic permeability and temperature change characteristics of the temperature-sensitive magnet to realize non-contact temperature measurement.

[0042] Specifically, an LC loop is provided, and the LC loop includes an inductor and a capacitor connected to the inductor. The iron core of the inductor is a temperature-sensitive magnetic core, and the temperature-sensitive magnetic core is in contact with the measured object to sense the temperature of the measured object (of course In practical application, it is not necessarily necessary for the temperature-sensitive magnetic core to be in contact with the measured object to sense the temperature of the measured object. The technical means of sensing the temperature of the measured object are all within the protection scope of the present invention). In practical applications, the temperature of the ...

Embodiment 2

[0053] This embodiment is an optimization to embodiment 1, see figure 2 ,Specifically:

[0054] a1. Set the frequency sweep range.

[0055] a2. Sweep within the set frequency sweep range, and send an electromagnetic wave signal of equal amplitude with continuously changing frequency to the LC loop.

[0056] In this embodiment, according to the characteristics of the LC circuit and the possible temperature range of the object, the frequency sweep range can be reasonably set in priority, and the frequency sweep work can be continuously carried out within this range, which can improve the efficiency and efficiency of detecting the resonance of the LC circuit. accuracy.

Embodiment 3

[0058] This embodiment is basically the same as Embodiment 1, the difference is that this embodiment proposes a method of querying the temperature of the object to be measured by using the obtained second working parameter of the frequency sweep module, such as image 3 As shown, in step C, the following steps are included:

[0059] c1. Utilize the second working parameter of the frequency sweep module to query the data storage module; the data storage module pre-stores the correspondence between the second working parameter of the frequency sweep module and the temperature of the measured object; in practical applications, the second working parameter includes The output frequency of the frequency sweep module or electrical parameters that can be accurately derived to obtain the output frequency of the frequency sweep module. From the analysis of the above-mentioned embodiment 1, it can be known that when the LC circuit resonates, the output frequency of the frequency sweep m...

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Abstract

The invention discloses a temperature measuring method and device, and a product using the same. The method comprises: step A, a swept frequency module sends equal-amplitude electromagnetic signals with frequencies changing continuously to an LC loop, wherein an inductor iron core of the LC loop is a thermosensitive magnetic core for sensing a temperature of a measured object; step B, a first working parameter and a second working parameter of the swept frequency module during a frequency sweeping process are recorded; step C, a second working parameter of the swept frequency module when the first working parameter is an extreme value is obtained and a temperature of a measured object is obtained by calculation or inquiring by using the second working parameter of the swept frequency module. The first working parameter includes a working current of the swept frequency module and the second working parameter includes an output frequency of the swept frequency module or an electrical parameter that can be used for accurate deduction to obtain the output frequency of the swept frequency module. According to the invention, on the basis of combination of the resonance principle with changing characteristics of the magnetic conductivity and the temperature of the thermosensitive magnetic body, non-contact temperate measurement is realized; and the temperature of a measured object can be measured rapidly and accurately. Therefore, the method and device are suitable for being popularized and applied widely.

Description

technical field [0001] The invention relates to the technical field of non-contact temperature measurement, in particular to a temperature measurement method, device and products using the temperature measurement device. Background technique [0002] Traditional non-contact temperature measurement generally uses radiation thermometers, which measure the temperature of the measured object through infrared radiation. This kind of temperature measuring device has high cost and complex structure, and is generally only used in industrial production, and does not meet daily application. [0003] The invention patent with the patent number of 2010101367842 discloses a non-contact temperature measurement method, which discloses the use of the magnetic permeability temperature characteristics of ferromagnets to realize non-contact temperature measurement. The principle is: using the temperature characteristics of the magnetic permeability of the ferromagnet, when the magnetic induct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/38
CPCG01K7/38
Inventor 王娅
Owner 广东中实源创科技有限公司
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