RFID sensor
By designing a detachable probe structure, the problem of RFID sensor probes being damaged or experiencing performance degradation in extreme environments is solved, enabling easy probe replacement and accurate data detection.
Patent Information
- Application Number
- CN202422920130.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The probes on existing RFID sensors are fixedly installed and are prone to damage or performance degradation when exposed to NH3 environment for a long time. They cannot be replaced, which affects the accuracy of NH3 concentration sensing and detection.
A detachable probe structure is designed, which allows for easy replacement of the probe through the cooperation of fastening bolts and inserts. The housing is equipped with mounting grooves, slots and clips to facilitate the disassembly and replacement of the probe.
Ensuring the probe is always in optimal condition improves the accuracy and reliability of data detection and avoids detection failures due to damage or performance degradation.
Smart Images
Figure CN223500929U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensor technology, specifically to an RFID sensor. Background Technology
[0002] Traditional RFID technology can only identify information about target objects and cannot directly access information about the physical environment. However, NH3 information in the environment can be obtained through NH3 sensors. Combining RFID technology with NH3 sensors undoubtedly broadens the application areas and functions of RFID technology, generating greater economic benefits. While using RFID to identify, locate, track, and manage items, it can also reveal other physical information about the items. For example, in a chemical plant, if precision instruments sensitive to NH3 are placed there, NH3 sensor tags can wirelessly detect whether the current NH3 level in the environment is suitable for storing the instruments.
[0003] Some existing NH3 sensors use RFID sensors. By setting a sensing probe on the RFID sensor, the sensing probe can detect the concentration of NH3 in the environment. The sensing probe is connected to a gas-sensitive membrane. When the gas-sensitive membrane encounters NH3, its impedance value will change. By detecting the change in the impedance and other parameters of the RFID sensor, the change in NH3 concentration can be detected.
[0004] However, the probes on some existing RFID sensors are fixedly installed. When the RFID sensor is in an environment containing NH3 for a long time, the probe is easily damaged or its performance degraded due to the extreme conditions such as large amounts of pollutants, corrosive substances, high temperature, and high humidity. Since the probe is fixedly installed, it cannot be replaced, which affects the sensing and detection of NH3 concentration and is not conducive to data detection and statistics. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an RFID sensor that solves the problem that some RFID sensors have fixed probes. When the RFID sensor is in an environment containing NH3 for a long time, the probe is easily damaged or its performance degraded due to the extreme conditions such as large amounts of pollutants, corrosive substances, high temperature, and high humidity. Because the probe is fixed, it cannot be replaced, which affects the sensing of NH3 concentration and is not conducive to data detection and statistics.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an RFID sensor includes a housing unit, on which a sensing unit is provided;
[0007] The housing unit includes a housing and mounting blocks, with the mounting blocks fixedly connected to both sides of the back of the housing;
[0008] The sensing unit includes a probe, a plug, and a fastening bolt. The probe is movably connected to the housing, the plug is fixedly connected to both sides of the probe, and the fastening bolt is threadedly connected to one of the plugs.
[0009] Preferably, the housing has a mounting groove, a slot, and a card slot, with the slots located on both sides of the mounting groove and the card slots located on the bottom side of the slot.
[0010] Preferably, a receiving plate is provided on the housing.
[0011] Preferably, the bottom end of the probe is inserted into the mounting groove.
[0012] Preferably, the plug is inserted into the slot and snapped into the slot.
[0013] Preferably, a filter screen is provided on the top of the probe.
[0014] Preferably, one of the inserts has a threaded hole, and the fastening bolt is threaded into the threaded hole.
[0015] This utility model discloses an RFID sensor, which has the following beneficial effects: by setting a detachable probe, when the probe is damaged, the fastening bolt is loosened, the probe is rotated, and the insertion block is rotated from the slot to the slot. The probe can be removed by moving the probe upward. The disassembly is relatively simple, which facilitates the replacement of the probe and makes the probe maintenance convenient. In this way, the probe is always in the best working condition, which ensures the accuracy of data detection. Attached Figure Description
[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the shell unit structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the sensing unit structure of this utility model.
[0020] In the diagram: 1. Housing unit; 11. Housing; 111. Mounting groove; 112. Slot; 113. Card slot; 114. Receiver plate; 12. Mounting block; 2. Sensing unit; 21. Probe; 211. Filter screen; 22. Insert block; 221. Threaded hole; 23. Fastening bolt. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] This application provides an RFID sensor that solves the problem that some RFID sensors have fixed probes 21, making it impossible to replace the probe 21 when it is damaged or its performance degrades, thus affecting the sensing of NH3 concentration and hindering data detection and statistics. The solution is to loosen the fastening bolt 23, rotate the probe 21, and rotate the insert block 22 from the slot 113 to the slot 112, and then move the probe 21 upwards to remove it. This makes disassembly simple and facilitates the replacement of the probe 21.
[0023] This utility model discloses an RFID sensor.
[0024] According to the appendix Figure 1-3 As shown, it includes a housing unit 1, on which a sensing unit 2 is provided. The housing unit 1 includes a housing 11 and a mounting block 12. A gas-sensitive film and an antenna are provided inside the housing 11. The gas-sensitive film can react with NH3, thereby changing the impedance value of the gas-sensitive film. The mounting block 12 is fixedly connected to both sides of the back of the housing 11, and the housing 11 can be installed in an NH3 environment through the mounting block 12.
[0025] Specifically disclosed, the sensing unit 2 includes a probe 21, a plug 22, and a fastening bolt 23. The probe 21 is movably connected to the housing 11, the plug 22 is fixedly connected to both sides of the probe 21, and the fastening bolt 23 is threadedly connected to one of the plugs 22. By loosening the fastening bolt 23 and rotating the probe 21, the plug 22 rotates from the slot 113 to the slot 112. Moving the probe 21 upwards allows it to be removed, making disassembly simple and easy to replace. This facilitates maintenance of the probe 21 and ensures that it is always in optimal working condition, guaranteeing the accuracy of data detection.
[0026] First, the housing 11 is installed in a sealed environment where NH3 needs to be detected. By introducing NH3 of different concentrations into the sealed environment, the NH3 enters the housing 11 through the filter 211 on the probe 21 and comes into contact with the gas-sensitive film. This causes a change in the impedance value of the gas-sensitive film, thereby changing the reflection coefficient of the antenna. Based on the impedance matching between the antenna and the gas-sensitive film, the change in the antenna reflection coefficient affects the receiving power of the receiving module. The receiving module displays the change in receiving power, thus realizing the test of the sensitivity characteristics of ammonia.
[0027] When probe 21 is damaged, first loosen the fastening bolt 23 to separate the fastening bolt 23 from the insert block 22. Then rotate probe 21 so that the insert block 22 rotates from the slot 113 to the slot 112. Move probe 21 upward to remove probe 21. Then replace it with a new probe 21 to complete the replacement of probe 21.
[0028] Furthermore, the housing 11 is provided with a mounting groove 111, a slot 112 and a card slot 113. The slot 112 is provided on both sides of the mounting groove 111, and the card slot 113 is provided on the bottom side of the slot 112.
[0029] Furthermore, a receiving plate 114 is provided on the housing 11. The receiving plate 114 is connected to the antenna. Changes in the antenna reflection coefficient will affect the receiving power of the receiving module. The receiving module displays the changes in the receiving power, thereby realizing the test of the sensitivity characteristics of ammonia.
[0030] Furthermore, the bottom end of the probe 21 is inserted into the mounting groove 111. The probe 21 is movably inserted into the mounting groove 111, making it easy to disassemble and replace the probe 21.
[0031] Furthermore, the insert 22 is inserted into the slot 112 and snapped into the slot 113.
[0032] Furthermore, a filter screen 211 is provided on the top of the probe 21. By providing the filter screen 211, impurities in the NH3 environment can be prevented from entering the housing 11 and contaminating the gas-sensitive membrane of the housing 11, which would be detrimental to the sensing and detection of NH3.
[0033] Furthermore, one of the inserts 22 has a threaded hole 221, and a fastening bolt 23 is threaded into the threaded hole 221. The fastening bolt 23 is threaded into the insert 22, so that the probe 21 is fixed in the housing 11.
[0034] Working principle: First, the housing 11 is installed in the sealed environment where NH3 needs to be detected. By introducing NH3 of different concentrations into the sealed environment, the NH3 enters the housing 11 through the filter 211 on the probe 21 and comes into contact with the gas-sensitive film. This causes the impedance value of the gas-sensitive film to change, thereby changing the reflection coefficient of the antenna. Based on the impedance matching between the antenna and the gas-sensitive film, the change in the antenna reflection coefficient will affect the receiving power of the receiving module. The receiving module displays the change in receiving power, thereby realizing the test of the sensitivity characteristics of ammonia.
[0035] When probe 21 is damaged, first loosen the fastening bolt 23 to separate the fastening bolt 23 from the insert block 22. Then rotate probe 21 so that the insert block 22 rotates from the slot 113 to the slot 112. Move probe 21 upward to remove probe 21. Then replace it with a new probe 21 to complete the replacement of probe 21.
[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An RFID sensor, comprising a housing unit (1), characterized in that, A sensing unit (2) is provided on the housing unit (1); The housing unit (1) includes a housing (11) and a mounting block (12), the mounting block (12) being fixedly connected to both sides of the back of the housing (11); The sensing unit (2) includes a probe (21), a plug (22) and a fastening bolt (23). The probe (21) is movably connected to the housing (11). The plug (22) is fixedly connected to both sides of the probe (21). The fastening bolt (23) is threadedly connected to one of the plugs (22).
2. An RFID sensor according to claim 1, characterized in that, The housing (11) is provided with a mounting groove (111), a slot (112) and a card slot (113). The slot (112) is located on both sides of the mounting groove (111), and the card slot (113) is located on the bottom side of the slot (112).
3. An RFID sensor according to claim 1, characterized in that, A receiving plate (114) is provided on the housing (11).
4. An RFID sensor according to claim 2, characterized in that, The bottom end of the probe (21) is inserted into the mounting slot (111).
5. An RFID sensor according to claim 2, characterized in that, The insert (22) is inserted into the slot (112) and the insert (22) is snapped into the slot (113).
6. An RFID sensor according to claim 1, characterized in that, A filter screen (211) is provided on the top of the probe (21).
7. An RFID sensor according to claim 1, characterized in that, One of the inserts (22) has a threaded hole (221), and the fastening bolt (23) is threaded into the threaded hole (221).