Inductive moisture measurement sensor
By using square receiving and transmitting electrodes on a PCB substrate in an inductive moisture measurement sensor, combined with a grounding electrode, the problem of the sensor being susceptible to interference from the measurement direction is solved, and high-accuracy moisture measurement is achieved.
Patent Information
- Application Number
- CN202422972983.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The sensors in existing inductive moisture meters are easily affected by the measurement direction when measuring wood, leading to inaccurate measurement results.
The system employs a square receiving electrode on a PCB substrate and a transmitting electrode arranged around the receiving electrode, combined with a grounding electrode to ensure that the electrodes do not deform. Inter-electrode interference is reduced through gaps and spring connections, resulting in stable signal transmission.
It improves the accuracy and stability of measurement results, the sensor is unaffected when measuring in different directions, and signal transmission is not affected by short circuit interference from direct contact of electrodes.
Smart Images
Figure CN223770128U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of moisture testing equipment technology, and in particular to an inductive moisture measurement sensor. Background Technology
[0002] Inductive moisture meters are widely used, but the sensors they employ have several limitations. In related technologies, most sensors struggle to measure the moisture content of materials stably and accurately. One significant problem is that the measurement results are easily affected by the measurement direction. Taking wood moisture measurement as an example, when using an inductive moisture meter, the sensor is in close contact with the wood, and the horizontal angle between the sensor and the wood grain changes, resulting in a significant change in the measured moisture value. This greatly reduces the accuracy and reliability of the measurement data.
[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0004] In view of at least one of the above technical problems, this application provides an inductive moisture measurement sensor.
[0005] This application provides an inductive moisture measurement sensor, comprising:
[0006] PCB substrate;
[0007] The receiving mechanism includes: a receiving electrode and a first terminal connected to the PCB substrate. The receiving electrode is square and has a first notch. The first terminal is located in the first notch and connected to the receiving electrode. The first terminal is used to connect to the measuring circuit through a first spring.
[0008] The transmitting mechanism includes: a transmitting electrode and a second terminal connected to a PCB substrate. The transmitting electrode is arranged around the receiving motor. The transmitting electrode has a second notch. The second terminal is located in the second notch. The second terminal is connected to the transmitting electrode. The second terminal is used to connect to the measuring circuit through a second spring.
[0009] One of the above technical solutions has at least one of the following advantages or beneficial effects: In this application, both the receiving electrode and the transmitting electrode are set on the PCB substrate, so that the sensor will not be deformed during use, thereby ensuring high accuracy of the measurement results. In addition, the sensor will not be affected by changes in the measurement direction.
[0010] In one possible implementation, there is a first gap between the transmitting electrode and the receiving electrode.
[0011] In one possible implementation, the first terminal is circular.
[0012] In one possible implementation, the second terminal is circular.
[0013] In one possible implementation, the first terminal is positioned close to the second terminal.
[0014] In one possible implementation, the inductive moisture measurement sensor further includes a grounding mechanism, which includes a grounding electrode and a third terminal connected to the PCB substrate. The grounding electrode is arranged around the transmitting electrode and has a third notch. The third terminal is connected to the grounding electrode and is used to connect to the measurement circuit via a third spring.
[0015] In one possible implementation, there is a second gap between the transmitting electrode and the grounding electrode.
[0016] In one possible implementation, the third terminal is positioned close to the second terminal.
[0017] The present application will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a first structural schematic diagram of the inductive moisture measurement sensor provided in an embodiment of this application;
[0020] Figure 2 This is a schematic diagram of the second structure of the inductive moisture measurement sensor provided in an embodiment of this application;
[0021] In the picture:
[0022] 100. PCB substrate;
[0023] 200, Receiving mechanism; 210, Receiving electrode; 220, First terminal; 211, First notch;
[0024] 300. Transmitting mechanism; 310. Transmitting electrode; 320. Second terminal; 311. Second notch;
[0025] 400. Grounding mechanism; 410. Grounding electrode; 420. Third terminal; 411. Third notch; Detailed Implementation
[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0027] This application provides an inductive moisture measurement sensor, including a PCB substrate, a receiving mechanism, a transmitting mechanism, and a grounding mechanism. The transmitting and receiving mechanisms form the two terminals of a capacitor used to measure moisture content, and the object under test is equivalent to the dielectric filling of this capacitor. When the moisture content of the object under test changes, it causes a change in its equivalent dielectric constant, thereby causing a change in the capacitance value. The measurement circuit calculates the change in moisture content by measuring this change in capacitance, and finally measures the moisture content.
[0028] The following is a description of the specific structure of the inductive moisture measurement sensor.
[0029] like Figure 1 and Figure 2 As shown, the inductive moisture measurement sensor includes: a PCB substrate; a receiving mechanism, including: a receiving electrode and a first terminal connected to the PCB substrate, the receiving electrode being square, having a first notch, the first terminal located in the first notch and connected to the receiving electrode, the first terminal being used to connect to a measurement circuit via a first spring; and a transmitting mechanism, including: a transmitting electrode and a second terminal connected to the PCB substrate, the transmitting electrode being arranged around the receiving electrode, the transmitting electrode having a second notch, the second terminal located in the second notch, the second terminal being connected to the transmitting electrode, the second terminal being used to connect to a measurement circuit via a second spring.
[0030] In use, the measuring circuit outputs a sine wave signal to the transmitting electrode, which is converted into an electromagnetic field that passes through the object being measured and is then received by the receiving electrode. Finally, the measuring circuit calculates and measures the moisture content of the object being measured.
[0031] This application places both the receiving and transmitting electrodes on a PCB substrate, preventing sensor deformation during use and ensuring high measurement accuracy. Furthermore, the sensor's measurement results are unaffected by changes in measurement orientation. Additionally, since both the receiving and transmitting electrodes are square, their surface area is larger than that of existing sensors; therefore, sensor rotation does not affect the measurement of moisture content.
[0032] like Figure 1 and Figure 2 As shown, in some embodiments, a first gap exists between the transmitting electrode and the receiving electrode. This first gap prevents direct contact between the transmitting and receiving electrodes. Direct contact would cause a short circuit, preventing signal transmission and thus hindering effective measurement. Furthermore, the first gap allows the signal emitted by the transmitting electrode to propagate to the receiving electrode in a suitable electric or electromagnetic field, reducing interference signals caused by physical contact between the electrodes.
[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the specific shape of the first terminal is not specifically limited; the first terminal can be a regular shape such as a square or a circle. In this embodiment, the first terminal is circular.
[0034] like Figure 1 and Figure 2 As shown, in some embodiments, the specific shape of the second terminal is not specifically limited; the second terminal can be a regular shape such as a square or a circle. In this embodiment, the second terminal is circular.
[0035] like Figure 1 and Figure 2 As shown, in some embodiments, the first terminal is positioned close to the second terminal. This helps to achieve a compact circuit layout for the sensor.
[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the inductive moisture measurement sensor further includes a grounding mechanism, which includes a grounding electrode and a third terminal connected to the PCB substrate. The grounding electrode is arranged around the transmitting electrode and is square in shape. The grounding electrode has a third notch and is connected to the grounding electrode. The third terminal is used to connect to the measurement circuit through a third spring.
[0037] The electrode is used to absorb excess sinusoidal signals to reduce the influence of surrounding substances on the moisture measurement.
[0038] like Figure 1 and Figure 2 As shown, in some embodiments, a second gap is provided between the transmitting electrode and the grounding electrode. The second gap can effectively prevent electrical short circuits between the transmitting electrode and the grounding electrode.
[0039] like Figure 1 and Figure 2 As shown, in some embodiments, the third terminal is positioned close to the second terminal. This helps to achieve a compact circuit layout for the sensor.
[0040] like Figure 1 and Figure 2As shown, in some embodiments, the specific shape of the third terminal is not specifically limited; the third terminal can be a regular shape such as a square or a circle. In this embodiment, the third terminal is circular.
[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0042] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0044] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0045] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0046] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.
Claims
1. An inductive moisture measuring sensor, characterized in that Comprising: a PCB substrate; a receiving mechanism comprising a receiving electrode and a first wiring electrode, both connected to the PCB substrate, the receiving electrode being square-shaped, the receiving electrode having a first gap, the first wiring electrode being located in the first gap and connected to the receiving electrode, the first wiring electrode being configured to be connected to a measurement circuit via a first spring; a transmitting mechanism comprising a transmitting electrode and a second wiring electrode, both connected to the PCB substrate, the transmitting electrode being located around the receiving electrode, the transmitting electrode having a second gap, the second wiring electrode being located in the second gap and connected to the transmitting electrode, the second wiring electrode being configured to be connected to the measurement circuit via a second spring.
2. The inductive moisture measuring sensor according to claim 1, characterized in that The transmitting electrode and the receiving electrode have a first gap therebetween.
3. The inductive moisture measuring sensor according to claim 1, characterized in that The first wiring electrode is circular-shaped.
4. The inductive moisture measuring sensor according to claim 1, characterized in that The second wiring electrode is circular-shaped.
5. The inductive moisture measuring sensor according to claim 1, characterized in that The first wiring electrode is located close to the second wiring electrode.
6. The inductive moisture measuring sensor according to claim 1, characterized in that The inductive moisture measurement sensor further comprises a grounding mechanism comprising a grounding electrode and a third wiring electrode, both connected to the PCB substrate, the grounding electrode being located around the transmitting electrode, the grounding electrode having a third gap, the third wiring electrode being connected to the grounding electrode, the third wiring electrode being configured to be connected to a measurement circuit via a third spring.
7. The inductive moisture measuring sensor according to claim 6, characterized in that The transmitting electrode and the grounding electrode have a second gap therebetween.
8. The inductive moisture measuring sensor according to claim 6, characterized in that The third wiring electrode is located close to the second wiring electrode.