Iot water meter signal detection device and iot water meter signal detection method

Abstract

The present application relates to the field of signal detection, disclose a kind of Internet of Things water meter signal detection device and Internet of Things water meter signal detection method, Internet of Things water meter signal detection device includes: signal shielding box, signal shielding box is formed with accommodating cavity, signal shielding box is used to accommodate the water meter to be measured;Signal amplifier, for accessing antenna signal and output after amplifying antenna signal;Adjustable signal attenuator, connected with signal amplifier, adjustable signal attenuator is used to adjust the antenna signal intensity output by signal amplifier and output;Built-in antenna, is arranged in signal shielding box, built-in antenna is connected with adjustable signal attenuator, built-in antenna is used to output antenna signal to the water meter to be measured;Host computer, connected with the water meter to be measured in signal shielding box, host computer is used to read and record the signal intensity of the water meter to be measured.The present application solves the problem of high cost and poor flexibility when setting darkroom to test the signal intensity of Internet of Things water meter.

Description

Technical Field

[0001] This invention relates to the field of signal detection, and more particularly to an IoT water meter signal detection device and a method for IoT water meter signal detection. Background Technology

[0002] Currently, testing IoT water meters requires setting up a darkroom to simulate various real-world conditions, thus making the test results more accurate. However, a darkroom is typically the size of an actual room, taking up a lot of space and incurring high design costs. Furthermore, in actual testing, each product under test needs to be taken to a darkroom at a fixed location for testing, resulting in poor flexibility. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide an IoT water meter signal detection device and an IoT water meter signal detection method to solve the problems of high cost and poor flexibility when setting up a darkroom to test the signal strength of IoT water meters.

[0004] The technical solution of the present invention is as follows: An IoT water meter signal detection device includes: A signal shielding box, wherein the signal shielding box forms a receiving cavity, and the signal shielding box is used to accommodate the water meter to be tested; A signal amplifier is used to receive antenna signals and amplify them before outputting them. An adjustable signal attenuator is connected to the signal amplifier, and the adjustable signal attenuator is used to adjust the antenna signal strength output by the signal amplifier before outputting it. An internal antenna is installed inside the signal shielding box. The internal antenna is connected to the adjustable signal attenuator and is used to output the antenna signal to the water meter to be measured. The host computer is connected to the water meter to be tested in the signal shielding box. The host computer is used to read and record the signal strength of the water meter to be tested.

[0005] Optionally, the signal shielding box includes: The housing has a receiving cavity; A metal layer is disposed on the outer layer of the housing; A wave-absorbing layer is disposed in the inner layer of the enclosure.

[0006] Optionally, the IoT water meter signal detection device also includes: A power consumption tester is connected to the water meter under test inside the signal shielding box. The power consumption tester is used to test the power consumption of the water meter under test.

[0007] Optionally, the IoT water meter signal detection device also includes: An external antenna is connected to the signal amplifier, and the external antenna is used to output the antenna signal to the signal amplifier.

[0008] Optionally, the external antenna includes an external nb antenna or an external 4G antenna, and the internal antenna includes an internal nb antenna or an internal 4G antenna; The signal amplifier is used to switch to NB signal amplification mode or 4G signal amplification mode when triggered.

[0009] Optionally, the IoT water meter signal detection device also includes: A power supply is connected to the water meter under test inside the signal shielding box. The power supply is used to provide the working voltage to the water meter under test.

[0010] The present invention also proposes an IoT water meter signal detection method applied to the IoT water meter signal detection device described above, comprising the following steps: Place the water meter to be tested in a signal shielding box; Set the type of built-in antenna that corresponds to the antenna signal being tested by the water meter under test; The adjustable signal attenuator is controlled to change the attenuation intensity of the antenna signal of the built-in antenna connected to the water meter under test, and the signal strength of the water meter under test is read by the host computer.

[0011] Optionally, the antenna signal being tested includes an NB signal or a 4G signal; before performing the step of setting the type of built-in antenna corresponding to the antenna signal being tested on the water meter, the method further includes: Set the type of external antenna corresponding to the antenna signal of the water meter under test. The type of external antenna should be the same as the type of internal antenna.

[0012] Optionally, the following steps are also included: The adjustable signal attenuator is controlled to change the attenuation intensity of the antenna signal, and the power consumption of the water meter under test is measured using a power consumption tester; or, Set up external and internal antennas corresponding to NB or 4G signals, and test the power consumption of the water meter under test for NB or 4G signals using a power consumption tester.

[0013] Optionally, the following steps are also included: The signal strength of the antenna signal is changed by repeatedly controlling the adjustable signal attenuator to obtain signal strength data of multiple water meters under test, and then calculations are performed.

[0014] This invention provides an IoT water meter signal detection device comprised of a signal shielding box, a signal amplifier, an adjustable signal attenuator, a built-in antenna, and a host computer. The signal shielding box contains a cavity to house the water meter under test. The signal amplifier receives and amplifies the antenna signal before outputting it. The adjustable signal attenuator is connected to the signal amplifier and adjusts the output antenna signal strength. The built-in antenna, located within the signal shielding box and connected to the adjustable attenuator, outputs its signal to the water meter under test. The host computer is connected to the water meter in the signal shielding box and reads and records the signal strength of the meter. Thus, this IoT water meter signal detection device can test the signal strength of the water meter under test, and it has a small footprint and low design cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a functional block diagram of an embodiment of the IoT water meter signal detection device of the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the signal shielding box in the IoT water meter signal detection device of the present invention.

[0018] Figure 3 This is a functional block diagram of another embodiment of the IoT water meter signal detection device of the present invention.

[0019] Figure 4 This is a flowchart of the method steps of an embodiment of the IoT water meter signal detection method of the present invention.

[0020] Figure 5 This is a flowchart of the method steps of another embodiment of the IoT water meter signal detection method of the present invention.

[0021] Figure 6 This is a flowchart of the method steps of another embodiment of the IoT water meter signal detection method of the present invention.

[0022] Figure 7 This is a flowchart of the method steps of another embodiment of the IoT water meter signal detection method of the present invention.

[0023] Explanation of reference numerals in the attached diagram: 10, signal amplifier; 20, adjustable signal attenuator; 30, signal shielding box; 31, enclosure; 32, metal layer; 33, absorbing layer; 40, built-in antenna; 50, host computer; 60, power consumption tester; 70, external antenna; 80, power supply. Detailed Implementation

[0024] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of the present invention involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0026] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements present. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0027] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Currently, testing IoT water meters requires setting up a darkroom to simulate various real-world conditions, thus making the test results more accurate. However, a darkroom is typically the size of an actual room, taking up a lot of space and incurring high design costs. Furthermore, in actual testing, each product under test needs to be taken to a darkroom at a fixed location for testing, resulting in poor flexibility.

[0030] To address the aforementioned problems, this invention proposes an Internet of Things (IoT) water meter signal detection device.

[0031] Reference Figure 1 In one embodiment, the IoT water meter signal detection device includes: A signal shielding box 30 is provided, which has a receiving cavity and is used to accommodate the water meter to be tested. Signal amplifier 10 is used to receive antenna signals and amplify and output the antenna signals; An adjustable signal attenuator 20 is connected to the signal amplifier 10. The adjustable signal attenuator 20 is used to adjust the antenna signal strength output by the signal amplifier 10 before outputting it. An internal antenna 40 is installed inside the signal shielding box 30. The internal antenna 40 is connected to the adjustable signal attenuator 20. The internal antenna 40 is used to output the antenna signal to the water meter to be measured. The host computer 50 is connected to the water meter to be tested in the signal shielding box 30. The host computer 50 is used to read and record the signal strength of the water meter to be tested.

[0032] In this embodiment, the signal shielding box 30 can be made of a material with signal shielding function, such as metal or metal fiber composite material. The size of the accommodating cavity of the signal shielding box 30 can be set according to the size of the water meter to be tested and the size of the built-in antenna 40. In this embodiment, two water meters to be tested can be placed in the signal shielding box 30, and the corresponding built-in antenna 40 can be set for testing. The upper computer 50 is connected to read the signal strength of the two water meters to be tested. Setting too many water meters to be tested will lead to a decrease in the accuracy of the test results. Considering the actual space of the IoT water meter signal detection device, the size of the signal shielding box 30 is set according to the standard of placing two water meters to be tested and the corresponding built-in antenna 40 in this embodiment.

[0033] The signal amplifier 10 is used to enhance the received weak antenna signal to a manageable level. When testing the water meter under test in environments far from the base station or with weak signals, the signal may attenuate. The signal amplifier 10 can improve the strength of the antenna signal, ensuring the reliability and stability of data transmission. In this embodiment, the use of the signal amplifier 10 can improve the signal transmission distance and quality, and reduce the bit error rate.

[0034] The adjustable signal attenuator 20 can be used to control the strength of the antenna signal. In practical applications, the transmission distance and environmental conditions of the water meter signal vary, and the signal strength will also change accordingly. The adjustable signal attenuator 20 can simulate different transmission distances and attenuation conditions. By adjusting the attenuation amount, the signal strength received by the water meter under test can be matched with various conditions in actual applications, thereby comprehensively testing the performance and stability of the water meter under different signal strengths. When the antenna signal power is high, the antenna signal reaching the water meter under test may be too strong, causing saturation or distortion in the water meter under test, affecting the accuracy of the test results. The adjustable signal attenuator 20 can appropriately attenuate the signal as needed, controlling the antenna signal strength within the normal operating range of the water meter under test, and avoiding signal overload.

[0035] The antenna is a key component for wireless signal transmission. It converts the antenna signal (electromagnetic wave) output by the adjustable signal attenuator 20 into an electrical signal and transmits it to the communication module inside the water meter under test. The host computer 50, connected to the water meter under test (which can be a computer or similar device), then reads the strength of the antenna signal received by the water meter. This allows the user to determine the signal strength of the water meter under test in the absence of interference, thus assessing the product quality. Furthermore, the IoT water meter signal detection device in this embodiment occupies less space than a darkroom, and since it only tests the signal strength of the water meter and does not require simulating other actual conditions, the internal components and materials required for the IoT water meter signal detection device in this embodiment are simpler and the cost is lower.

[0036] This invention provides an IoT water meter signal detection device comprised of a signal shielding box 30, a signal amplifier 10, an adjustable signal attenuator 20, a built-in antenna 40, and a host computer 50. The signal shielding box 30 has a cavity for accommodating the water meter under test. The signal amplifier 10 receives the antenna signal, amplifies it, and outputs it. The adjustable signal attenuator 20 is connected to the signal amplifier 10 and adjusts the output antenna signal strength. The built-in antenna 40 is housed within the signal shielding box 30 and connected to the adjustable signal attenuator 20, outputting the antenna signal to the water meter under test. The host computer 50 is connected to the water meter in the signal shielding box 30 and reads and records the signal strength of the water meter. Thus, this IoT water meter signal detection device can test the signal strength of the water meter under test, and it has a small footprint and low design cost.

[0037] Reference Figure 2In one embodiment, the signal shielding box 30 includes: Box 31, wherein the box 31 forms an accommodating cavity; Metal layer 32 is disposed on the outer layer of the housing 31; The wave-absorbing layer 33 is disposed in the inner layer of the housing 31.

[0038] In this embodiment, the outer layer of the enclosure 31 is entirely encased in metal, which can shield external signals and reduce the interference of external electromagnetic waves on the test signal. The metal layer 32 can be made of aluminum or copper, etc. If the shielding effectiveness of the shield can reach 80dB-140dB, then the interference from the external environment can be ignored. The wave-absorbing layer 33 set in the inner layer of the enclosure 31 absorbs electromagnetic waves, which can reduce the multipath effect caused by reflections inside the enclosure 31 on the test results. The material of the wave-absorbing layer 33 can be a conductive material, such as a carbon-based material or a metal coating, or a magnetic material, such as ferrite or magnetic powder, or a polymer-based composite material, ceramic material, or composite material, etc. Compared with the shielded room of a darkroom, because the shielded box is covered with wave-absorbing material, the multipath effect caused by reflections from the walls and ceiling on the test results can be reduced, while the electromagnetic waves inside the shielded room will be reflected and superimposed on the ceiling and inner walls. The signal shielding box 30 set in this embodiment can effectively reduce the interference of external signals on the test signal during the test, making the test results more accurate.

[0039] Reference Figure 3 In one embodiment, the IoT water meter signal detection device further includes: A power consumption tester 60 is connected to the water meter under test inside the signal shielding box 30. The power consumption tester 60 is used to test the power consumption of the water meter under test.

[0040] In this embodiment, a power consumption tester 60 is used to test the power consumption of the water meter under test under different signal strengths or when connected to different antennas. In practical applications, the actual battery life of some water meters is shorter than the theoretical lifespan, leading to increased maintenance costs. Under poor signal conditions, the communication time between the water meter and the base station / platform is related; the weaker the signal and the longer the communication time, the higher the power consumption of the water meter. Therefore, to address this situation, the IoT water meter signal detection device in this embodiment can test the battery life of the water meter under different signal strengths and the impact of using different antennas on power consumption under the same signal environment. After testing the power consumption under different conditions with the power consumption tester 60, water meters with lower power consumption can be selected.

[0041] Reference Figure 3 In one embodiment, the IoT water meter signal detection device further includes: An external antenna 70 is connected to the signal amplifier 10, and the external antenna 70 is used to output antenna signals to the signal amplifier 10.

[0042] In this embodiment, the external antenna 70 is used to receive antenna signals output from an external base station or antenna device, and outputs them to the signal amplifier 10 for amplification before subsequent testing. The specific external antenna 70 can be selected according to actual conditions and user needs.

[0043] Furthermore, in one embodiment, the external antenna 70 includes an external nb antenna or an external 4G antenna, and the internal antenna 40 includes an internal nb antenna or an internal 4G antenna; The signal amplifier 10 is used to switch to NB signal amplification mode or 4G signal amplification mode when triggered.

[0044] In this embodiment, different antenna signals received by the water meter under test can be tested. This embodiment tests NB signals and 4G signals. When testing NB signals, an external NB antenna and a built-in NB antenna are required to ensure that the external NB signal can be received and output to the water meter under test in the signal shielding box 30. Similarly, when testing 4G signals, an external 4G antenna and a built-in 4G antenna are required to ensure that the external 4G signal can be received and output to the water meter under test in the signal shielding box 30. Because different antenna signals have different frequencies, wavelengths, modulation methods, and application scenarios, corresponding built-in antennas 40 and external antennas 70 need to be set for receiving antenna signals. The types of external antennas 70 and built-in antennas 40 can also be set according to the type of antenna signal being tested by the water meter under test. Antenna signals include, but are not limited to, NB signals and 4G signals, and can be specifically set according to actual conditions and user needs. Furthermore, the signal amplifier 10 can be manually controlled to switch to NB signal amplification mode to amplify the NB signal, or to 4G signal amplification mode to amplify the 4G signal. Two signal amplifiers 10 can also be set up, one for amplifying the NB signal and the other for amplifying the 4G signal. It should be noted that the signal amplifiers 10 can be combined into one, but each has its own independent power supply system, external antenna 70 and internal antenna 40. When using them, it is necessary to switch the power supply system, external antenna 70 and internal antenna 40 according to the test content.

[0045] Reference Figure 3 In one embodiment, the IoT water meter signal detection device further includes: The power supply 80 is connected to the water meter under test inside the signal shielding box 30. The power supply 80 is used to provide the working voltage to the water meter under test.

[0046] In this embodiment, the power supply 80 can supply power to the water meter under test, enabling simultaneous power-on and network connection for all water meters under test, ensuring consistent network connection time, and thus guaranteeing the normal operation of the testing process for the water meter under test. The power supply 80 in this embodiment can be an adjustable power supply 80, or a battery, etc., and can be freely switched according to the test object. The specific power supply 80 can also be selected according to actual conditions and user needs.

[0047] The present invention also proposes an IoT water meter signal detection method applicable to the IoT water meter signal detection device described above.

[0048] Reference Figures 1 to 4 In one embodiment, the IoT water meter signal detection method includes the following steps: S100. Place the water meter to be tested in the signal shielding box 30; S200, 40 types of built-in antennas corresponding to the antenna signals tested by the water meter under test; S300 controls the adjustable signal attenuator 20 to change the attenuation strength of the antenna signal of the built-in antenna 40 connected to the water meter under test, and reads the signal strength of the water meter under test through the host computer 50.

[0049] In this embodiment, the water meter to be tested is first placed in the signal shielding box 30. One or two water meters can be placed in the box. Then, the water meter to be tested is connected to the host computer 50, and the built-in antenna 40 is correspondingly set with the water meter to be tested. The built-in antenna 40 is connected to the adjustable signal attenuator 20, and the adjustable signal attenuator 20 is connected to the signal amplifier 10. This completes the connection of each detection device in the IoT water meter signal detection device. By controlling the adjustable signal attenuator 20, different transmission distances and attenuation conditions can be simulated. By adjusting the attenuation, the signal strength received and output by the built-in antenna 40 to the water meter to be tested is matched with various situations in actual applications, thereby comprehensively testing the performance and stability of the water meter under different signal strengths. When the antenna signal power is high, the antenna signal reaching the water meter to be tested may be too strong, causing saturation or distortion in the water meter to be tested, affecting the accuracy of the detection results. The adjustable signal attenuator 20 can appropriately attenuate the signal as needed, controlling the antenna signal strength within the normal operating range of the water meter to be tested, avoiding signal overload. This allows for the determination of the output signal strength of the water meter under test when it receives antenna signals of varying strengths. The user can then select the water meter with the highest signal strength by reading the signal strength from the host computer 50.

[0050] Reference Figure 5 In one embodiment, the antenna signal being tested includes an NB signal or a 4G signal; before performing the step of setting the 40 types of built-in antennas corresponding to the antenna signal being tested on the water meter, the method further includes: S110. Set 70 types of external antennas corresponding to the antenna signals tested by the water meter to be tested. The 70 types of external antennas are the same as the antenna signals corresponding to the 40 types of internal antennas.

[0051] In this embodiment, the antenna signal being tested includes either an NB signal or a 4G signal. This allows for testing of different antenna signals received by the water meter under test. When testing the NB signal, both an external NB antenna and a built-in NB antenna are required to ensure that the external NB signal can be received and output to the water meter under test in the signal shielding box 30. Similarly, when testing the 4G signal, both an external 4G antenna and a built-in 4G antenna are required to ensure that the external 4G signal can be received and output to the water meter under test in the signal shielding box 30. Because different antenna signals have different frequencies, wavelengths, modulation methods, and application scenarios, corresponding built-in antennas 40 and external antennas 70 are required for receiving the antenna signals.

[0052] Reference Figure 6 In one embodiment, the IoT water meter signal detection method further includes the following steps: S410 controls the adjustable signal attenuator 20 to change the attenuation intensity of the antenna signal, and tests the power consumption of the water meter under test using the power consumption tester 60; or, S420: Set the external antenna 70 and the internal antenna 40 corresponding to the nb signal or 4G signal, and test the power consumption of the water meter under test for the nb signal or 4G signal using the power consumption tester 60.

[0053] In this embodiment, the power consumption tester 60 can be used to test the power consumption of the water meter under test under different signal strengths or when connected to different antennas. In practical applications, the actual battery life of some water meters is shorter than the theoretical lifespan, leading to increased maintenance costs. Under poor signal conditions, the communication time between the water meter and the base station / platform is related; the weaker the signal and the longer the communication time, the higher the power consumption of the water meter. Therefore, to address this, the IoT water meter signal detection device in this embodiment can test the battery life of the water meter under different signal strengths and the impact of using different antennas on power consumption under the same signal environment. After testing the power consumption under different conditions using the power consumption tester 60, water meters with lower power consumption can be selected. Specifically, the adjustable signal attenuator 20 can be controlled to change the attenuation intensity of the antenna signal, and the power consumption of the water meter under test can be tested using the power consumption tester 60 under different antenna signal strengths. The power consumption of the water meter under test can also be tested under different antenna conditions, for example, by setting an external antenna 70 and an internal antenna 40 corresponding to NB or 4G signals, and then testing the power consumption of the water meter under test for NB or 4G signals using the power consumption tester 60. In this way, users can select the appropriate water meter for different scenarios based on the power consumption of the water meter under various conditions.

[0054] Reference Figure 7 In one embodiment, the IoT water meter signal detection method further includes the following steps: S500 repeatedly controls the adjustable signal attenuator 20 to change the attenuation intensity of the antenna signal, obtains signal strength data of multiple water meters under test, and performs calculations.

[0055] In this embodiment, the adjustable signal attenuator 20 can be controlled to attenuate to multiple different signal strengths sequentially. It can also be controlled to attenuate a single signal strength multiple times. Since the adjustable signal attenuator 20 cannot guarantee identical attenuation for every signal strength, multiple tests are necessary to reduce errors. Furthermore, the signal strength data from multiple water meters under test are calculated, specifically through averaging or other algorithms. This reduces errors caused by hardware settings in the IoT water meter signal detection device.

[0056] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An Internet of Things (IoT) water meter signal detection device, characterized in that, include: A signal shielding box, wherein the signal shielding box forms a receiving cavity, and the signal shielding box is used to accommodate the water meter to be tested; The size of the signal shielding box is set based on the standard of accommodating two water meters to be tested and their corresponding built-in antennas. An external antenna is connected to a signal amplifier, and the external antenna is used to output antenna signals to the signal amplifier; the external antenna includes an external NB antenna or an external 4G antenna; A signal amplifier is used to receive antenna signals and amplify them before outputting them. An adjustable signal attenuator is connected to the signal amplifier, and the adjustable signal attenuator is used to adjust the antenna signal strength output by the signal amplifier before outputting it. An internal antenna is installed inside the signal shielding box. The internal antenna is connected to the adjustable signal attenuator. The internal antenna is used to output the antenna signal to the water meter under test. The internal antenna may include an internal NB antenna or an internal 4G antenna. The host computer is connected to the water meter to be tested in the signal shielding box. The host computer is used to read and record the signal strength of the water meter to be tested. A power consumption tester is connected to the water meter under test inside the signal shielding box. The power consumption tester is used to test the power consumption of the water meter under test under different antenna signal strengths or when connected to different antennas.

2. The IoT water meter signal detection device as described in claim 1, characterized in that, The signal shielding box includes: The housing has a receiving cavity; A metal layer is disposed on the outer layer of the housing; A wave-absorbing layer is disposed in the inner layer of the enclosure.

3. The IoT water meter signal detection device as described in claim 1, characterized in that, The signal amplifier is used to switch to NB signal amplification mode or 4G signal amplification mode when triggered.

4. The IoT water meter signal detection device as described in claim 1, characterized in that, Also includes: A power supply is connected to the water meter under test inside the signal shielding box. The power supply is used to provide the working voltage to the water meter under test.

5. An IoT water meter signal detection method applied to the IoT water meter signal detection device as described in any one of claims 1-4, characterized in that, Includes the following steps: Place the water meter to be tested in a signal shielding box; Set the type of external antenna corresponding to the antenna signal being tested on the water meter under test. The type of external antenna is the same as the type of internal antenna. The antenna signal being tested includes NB signal or 4G signal. Set the type of built-in antenna that corresponds to the antenna signal being tested by the water meter under test; The adjustable signal attenuator is controlled to change the attenuation strength of the antenna signal of the built-in antenna connected to the water meter under test, and the signal strength of the water meter under test is read by the host computer. The adjustable signal attenuator is controlled to change the attenuation intensity of the antenna signal, and the power consumption of the water meter under test is measured using a power consumption tester; or, Set up external and internal antennas corresponding to NB or 4G signals, and test the power consumption of the water meter under test for NB or 4G signals using a power consumption tester.

6. The IoT water meter signal detection method as described in claim 5, characterized in that, It also includes the following steps: The signal strength of the antenna signal is changed by repeatedly controlling the adjustable signal attenuator to obtain signal strength data of multiple water meters under test, and then calculations are performed.

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