Methods, devices, and storage media for detecting the installation location of water heater heating elements

Abstract

This application provides a method, apparatus, and storage medium for detecting the installation position of a water heater heating element. The method involves controlling a vibrating generator to strike the flange of the water heater under test, generating a vibration signal. This triggers a vibration sensor located on the inner tank or flange of the water heater to collect the vibration signal. Then, the vibration signal is processed using a signal time difference method or a signal fitting method to determine the accuracy of the heating element installation position. This method of detecting the heating element installation position combines relevant instruments and algorithms into a detection system, avoiding the problem of personnel relying on personal experience to determine the accuracy of the heating element installation position. This makes the detection more precise and thus ensures the safety of the water heater.

Description

Technical Field

[0001] This application relates to the field of water heater technology, and in particular to a method, device and storage medium for detecting the installation position of the heating element in a water heater. Background Technology

[0002] With the development of water heater technology and the improvement of people's living standards, water heaters have become the most common household appliances in people's daily lives. When purchasing water heaters, in addition to considering energy consumption, people also pay special attention to the safety of water heaters. This has led water heater manufacturers to attach importance to the quality inspection process, especially the installation position of the heating element, one of the core components of the water heater.

[0003] In the existing technology, the installation position of the heating element in the water heater is mainly determined by manual visual inspection during the production process. That is, the workers rely on their personal experience to visually inspect whether there is any obvious deviation in the installation position of the heating element. If there is, they will further use vernier calipers to measure and obtain the offset position, and then manually adjust it.

[0004] However, since the staff rely entirely on their personal experience to make judgments, errors and inaccuracies in the testing can still occur, resulting in the production of substandard water heaters and causing serious safety hazards. Summary of the Invention

[0005] This application provides a method, device, and storage medium for detecting the installation position of the heating element in a water heater, in order to solve the safety problems caused by inaccurate detection that may occur when the installation position of the heating element is detected manually during the water heater production process.

[0006] Firstly, this application provides a method for detecting the installation position of the heating element in a water heater, comprising:

[0007] The vibrating sound generator is controlled to strike the flange of the water heater under test, generating vibrating sound waves.

[0008] The vibration sensor installed on the inner tank or flange of the water heater to be tested is triggered to collect and obtain the vibration signal corresponding to the vibration sound wave;

[0009] The vibration signal is processed using the signal time difference method or signal fitting method to determine whether the installation position of the heating element of the water heater under test is accurate.

[0010] Secondly, this application provides a device for detecting the installation position of the heating element of a water heater, comprising:

[0011] The control module is used to control the vibration generator to strike the flange of the water heater under test, generate a vibration signal, and trigger the vibration sensor set on the inner tank or flange of the water heater under test to collect and obtain the vibration signal corresponding to the vibration sound wave.

[0012] The detection module is used to process the vibration signal using the signal time difference method or the signal fitting method to determine whether the installation position of the heating element of the water heater under test is accurate.

[0013] Thirdly, this application provides an electronic device, including: a processor and a memory;

[0014] The memory stores computer-executed instructions;

[0015] The processor executes computer execution instructions stored in the memory, causing the processor to perform the detection method as described in any of the preceding claims.

[0016] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the detection method described in any of the preceding claims.

[0017] Fifthly, this application provides a computer program product including a computer program that, when executed by a processor, implements the method described in the preceding claim.

[0018] This application provides a method, device, and storage medium for detecting the installation position of a water heater heating element. The method involves controlling a vibrating sound generator to strike the flange of the water heater under test, generating vibrational sound waves. This triggers a vibration sensor installed on the inner tank or flange of the water heater to collect and acquire the vibration signal corresponding to the sound waves. The vibration signal is then processed using a signal time difference method or a signal fitting method to determine whether the installation position of the heating element in the water heater is accurate. Compared to existing technologies where workers rely on personal experience to determine the accuracy of the heating element installation position, which involves significant errors, this application, based on the principle of sound waves, uses a vibrating sound generator and vibration sensor installed in the water heater to process the generated and received vibration signals, enabling a more accurate detection of the heating element's installation position and thus ensuring the safety of the water heater. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 This application provides a schematic diagram of a system structure for testing a water heater;

[0021] Figure 2 This is a flowchart illustrating a method for detecting the installation position of a water heater heating element provided in this application;

[0022] Figure 3 This is a flowchart illustrating another method for detecting the installation position of a water heater heating element provided in this application;

[0023] Figure 4 A schematic diagram showing the locations of the four vibration sensors inside the water heater under test;

[0024] Figure 5 This is a flowchart illustrating another method for detecting the installation position of a water heater heating element provided in this application;

[0025] Figure 6 This is a schematic diagram of the emitted and reflected waves of a vibration signal propagating from the flange of a water heater to the bottom of the inner tank, as provided in this application.

[0026] Figure 7 This is a schematic diagram of the preset frequency diagram and preset phase diagram provided in this application;

[0027] Figure 8 This is a schematic diagram of the frequency domain diagram and phase diagram of the second vibration signal of the water heater under test obtained by this application;

[0028] Figure 9 This is a schematic diagram of a device for detecting the installation position of a water heater's heating element, as provided in this application.

[0029] Figure 10 This is a schematic diagram of the hardware structure of the electronic device provided in this application.

[0030] In the attached diagram: 11 Detection device; 111 Detector; 12 Water heater to be tested; 121 Outer shell of water heater to be tested; 122 Insulation layer; 123 Inner tank; 124 Heating element; 125 Inlet pipe; 126 Outlet pipe; 127 Flange; 400 Vibration sensor; 410 Vibration sensor; 420 Vibration sensor; 430 Vibration sensor; 601 Transmitted wave; 602 Reflected wave. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0032] Before a water heater leaves the factory, the installation position of its internal heating element must be checked. This is because if the heating element is installed backwards or improperly, it will disrupt the heating logic of the entire water heater, preventing it from heating according to the intended plan. For example, the water stored in the inner tank of a water heater can be stratified by temperature, typically into seven layers. The fourth layer from the top has an intermediate temperature. The heating element is usually located near the fourth layer's temperature. When the fourth layer's water temperature does not meet a pre-set calibration value, the heating element activates to heat the water in the inner tank. Conversely, when the fourth layer's water temperature is equal to or exceeds the pre-set calibration value, the heating element enters a dormant state, meaning it does not heat the water in the inner tank. If the heating element is not installed in the correct position, causing it to be not near the fourth water temperature range (e.g., below the fourth water temperature range), the area it is targeting will change. Consequently, it will not be able to heat the water according to the expected heating plan, which may result in insufficient or excessive water temperature. This could lead to damage to the water heater or, in severe cases, scalding of the user.

[0033] For this reason, in existing technologies, workers typically rely on their experience to check the accuracy of the heating element's installation position. However, insufficient experience or errors can lead to inaccurate results. To address this technical problem, the inventive concept of this application lies in using acoustic wave detection to replace manual detection, thereby achieving effective verification of the heating element's installation position.

[0034] The technical solutions of the embodiments of this application and how the technical solutions of this application solve the above-mentioned technical problems are described in detail below with specific examples. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0035] refer to Figure 1 , Figure 1 This application provides a schematic diagram of a system structure for testing a water heater, as shown below. Figure 1 As shown, the system includes: a detection device 11 and a water heater 12 to be tested; wherein, the specific structure of the water heater 12 to be tested is as follows: Figure 1 As shown, the device mainly includes: a water heater shell 121 to be tested, an insulation layer 122 disposed inside the water heater shell 121, an inner tank 123, a heating element 124 disposed in the inner tank 123, an inlet pipe 125 and an outlet pipe 126, and a flange 127. Additionally, the testing device 11 includes: a vibration generator and a vibration sensor disposed inside the water heater 12 to be tested, and a detector 111 disposed outside the water heater 12 to be tested and capable of controlling the vibration generator and the vibration sensor.

[0036] In this embodiment of the application, the detector 111 in the detection device 11 can control the vibration generator to strike the flange 127 of the water heater 12 to be tested, and trigger the vibration sensor to collect the vibration signal and send it to the detector 111 so that the detector 111 can process the received vibration signal to determine whether the installation position of the heating tube 124 of the water heater 12 to be tested is accurate.

[0037] Example 1

[0038] Figure 2 This is a flowchart illustrating a method for detecting the installation position of the heating element in a water heater, as provided in this application. Figure 2 As shown, the method includes:

[0039] Step 201: Control the vibration generator to strike the flange of the water heater under test to generate vibration sound waves.

[0040] Step 202: Trigger the vibration sensor set on the inner tank or flange of the water heater to be tested to collect and obtain the vibration signal corresponding to the vibration sound wave.

[0041] In this embodiment, the vibration generator can be installed on the flange of the water heater, and the vibration sensor can be installed at a specific location on the water heater. The detector controls the vibration generator via wireless communication, enabling it to generate vibrational sound waves in the water heater. This causes the heating element to vibrate due to the externally transmitted vibrational sound waves, which in turn propagate outwards. The vibration sensor installed on the water heater can then collect these vibrational sound waves, convert them into vibration signals, and send them to the detector.

[0042] Step 203: Use the signal time difference method or signal fitting method to process the vibration signal accordingly in order to determine whether the installation position of the heating element of the water heater under test is accurate.

[0043] In this embodiment, after receiving the vibration signal, the detector can process the signal using signal time difference or signal fitting methods. For example, the above two methods can be used to determine whether the time, frequency domain, and / or time domain of the vibration sound wave collected by the vibration sensor differs from the preset detection standard, and whether the difference is within a reasonable range, so as to determine whether the installation position of the heating element of the water heater under test is accurate.

[0044] In this example, a vibration generator is used to strike the flange of the water heater under test, generating a vibration sound wave. This triggers a vibration sensor located on the inner tank or flange of the water heater to collect and acquire the vibration signal corresponding to the sound wave. The vibration signal is then processed using a signal time difference method or a signal fitting method to determine whether the heating element of the water heater is installed accurately. Compared to existing technologies where workers rely on personal experience to determine the accuracy of the heating element's installation, which involves significant errors, this application, based on the principle of sound waves, uses a vibration generator and vibration sensor installed in the water heater to process the generated and received vibration signals, enabling a more accurate detection of the heating element's installation position and thus ensuring the safety of the water heater.

[0045] Example 2

[0046] Figure 3 A flowchart illustrating another method for detecting the installation position of the heating element in a water heater provided in this application is shown below. Figure 3 As shown, the method includes:

[0047] Step 301: Control the vibration generator to strike the flange of the water heater under test to generate vibration sound waves.

[0048] Step 302: Trigger the four vibration sensors evenly distributed around the center of the inner tank of the water heater to be tested to collect and obtain the first vibration signal corresponding to the vibration sound wave.

[0049] Step 303: Acquire the first vibration signal collected by the four vibration sensors and the corresponding acquisition time.

[0050] In this embodiment, because the inner tank of the water heater is symmetrical front to back and left to right, four vibration sensors can be installed at the center of the outer wall around the inner tank of the water heater to be tested. For example, Figure 4 This is a schematic diagram showing the locations of the four vibration sensors inside the water heater being tested.

[0051] When the heating element vibrates due to the vibration sound waves generated and transmitted by the external vibration generator striking the flange of the water heater under test, the corresponding vibration signal will be transmitted outward. After the transmitted vibration sound waves are collected by the four vibration sensors, the vibration signal corresponding to the vibration sound waves and the collection time can be sent to the detector.

[0052] Step 304: Based on the first wave vibration signal collected by the two vibration sensors in the horizontal direction and the corresponding collection time, obtain the time difference value in the horizontal direction.

[0053] Step 305: Based on the first wave vibration signal collected by the two vibration sensors in the vertical direction and the corresponding acquisition time, obtain the time difference value in the vertical direction.

[0054] Step 306: If the time difference in the horizontal direction is not within the first time difference threshold range, and / or the time difference in the vertical direction is not within the second time difference threshold range, then it is determined that the heating element of the water heater to be tested is not installed accurately.

[0055] In this embodiment, each vibration sensor has its corresponding identifier ID. When the vibration sensor sends the first vibration signal and the corresponding acquisition time, it can also send its corresponding ID. This allows the detector to determine whether the acquisition direction of the first vibration signal sent by the vibration sensor is horizontal or vertical, and also to determine whether the corresponding time difference threshold is a first time difference threshold or a second time difference threshold, based on the ID of the vibration sensor.

[0056] Specifically, based on the ID, the first wave vibration signal and corresponding acquisition time of the two vibration sensors in the horizontal direction are determined, and the two acquisition times are subtracted to obtain the time difference in the horizontal direction. Similarly, based on the ID, the first wave vibration signal and corresponding acquisition time of the two vibration sensors in the vertical direction are determined, and the two acquisition times are subtracted to obtain the time difference in the vertical direction.

[0057] In addition, it is determined whether the time difference in the horizontal direction is within the first time difference threshold range and whether the time difference in the vertical direction is within the second time difference threshold range. If either of these two values ​​is outside the corresponding time difference threshold range, it can be determined that the heating element of the water heater under test is not installed accurately.

[0058] It should be noted that the detector has a preset first time difference threshold in the horizontal direction and a second time difference threshold in the vertical direction. The first and second time difference thresholds are obtained by detecting the time difference range of a water heater with the heating element installed in the correct position. For example, if both the first and second time difference thresholds are set to 10μs, the range of the first time difference threshold is [0,10], and the range of the second time difference threshold is [0,10].

[0059] In this embodiment, a vibration generator is controlled to strike the flange of the water heater under test, generating a vibration sound wave. This triggers four vibration sensors, evenly distributed around the center of the inner tank of the water heater, to collect and acquire the first vibration signal corresponding to the vibration sound wave. Based on this first vibration signal and the corresponding acquisition time, the first wave vibration signal collected by the two vibration sensors in the horizontal direction and the corresponding acquisition time are calculated according to ID to obtain the time difference value in the horizontal direction. Similarly, the first wave vibration signal collected by the two vibration sensors in the vertical direction and the corresponding acquisition time are calculated to obtain the time difference value in the vertical direction.

[0060] Subsequently, if the detector determines that the time difference in the horizontal direction is not within the first time difference threshold range, and / or the time difference in the vertical direction is not within the second time difference threshold range, it indicates that the heating element of the water heater under test is not installed in an accurate position.

[0061] As can be seen, compared with the prior art where workers rely on personal experience to judge whether the heating element installation position is accurate, which has a large error, this embodiment is based on the principle of sound waves. It triggers four vibration sensors set at the center of the inner tank of the water heater to collect the first vibration signal and the corresponding collection time. The signal time difference method is used to accurately determine whether the installation position of the heating element of the water heater under test is accurate, thereby ensuring the safety of the water heater.

[0062] Optionally, in the above Figure 3 Based on the example shown, the method may further include:

[0063] The horizontal offset of the heating element is obtained based on the time difference in the horizontal direction and the propagation speed of the vibration signal. Similarly, the vertical offset of the heating element is obtained based on the time difference in the vertical direction and the propagation speed of the vibration signal.

[0064] In this embodiment, the detector is preset with a propagation speed corresponding to the vibration signal, which can be the propagation speed of sound waves in air, 340m / s.

[0065] When the detector determines that the time difference in the horizontal direction is not within the first time difference threshold range, that is, when the detector determines that the installation position of the heating element of the water heater to be tested is inaccurate in the horizontal direction, the detector determines the two vibration sensors in the horizontal direction according to the ID. By comparing the magnitude of the acquisition time value corresponding to the first wave vibration signal acquired by the two vibration sensors in the horizontal direction, the location of the vibration sensor corresponding to the smaller acquisition time value is determined as the specific offset direction of the heating element of the water heater to be tested.

[0066] Furthermore, the detector determines the offset value of the heating tube in the aforementioned specific direction. Based on the above... Figure 3 In the example shown, the time difference in the horizontal direction is obtained, and its product with the propagation speed corresponding to the collected vibration signal is calculated. The product value is then used as the offset value of the heating element of the water heater under test in the specific offset direction.

[0067] Similarly, when the detector determines that the vertical time difference is not within the second time difference threshold range, that is, when the detector determines that the installation position of the heating element of the water heater under test is inaccurate in the vertical direction, the detector uses the same processing method to determine the horizontal offset value of the heating element of the water heater under test, based on the ID, to obtain the vertical offset value of the heating element of the water heater under test.

[0068] like Figure 4 In the diagram, 400 and 420 are vibration sensors in the horizontal direction, and the acquisition times corresponding to the first wave vibration signals collected by these two horizontal vibration sensors are 22μs and 34μs, respectively. Figure 4 In the diagram, 410 and 430 are vibration sensors in the vertical direction, respectively. The acquisition times for the first wave vibration signal collected by these two vertical vibration sensors are 25 μs and 40 μs, respectively. The detector receives... Figure 4 After receiving the signals from the four vibration sensors shown, the time difference in the horizontal direction was 12 μs and the time difference in the vertical direction was 15 μs, obtained using the method described above.

[0069] After acquiring the time difference values ​​in the horizontal and vertical directions, the detector determines whether the horizontal time difference value is within a preset first time difference threshold range, and whether the vertical time difference value is within a preset second time difference threshold range. Based on the determination results, it determines whether the heating element of the water heater under test has shifted. As shown in the example above, if the horizontal time difference value is greater than the preset first time difference threshold, and the vertical time difference value is greater than the preset second time difference threshold, then the detector determines that the installation position of the heating element of the water heater under test has shifted in both the horizontal and vertical directions.

[0070] For example, the detector will determine the direction in which the installation position of the water heater's heating element is biased towards the location of sensor 400 by comparing the acquisition time values ​​corresponding to the first wave of vibration signals collected by two vibration sensors (400 and 420) in the horizontal direction. Simultaneously, it will determine the direction in which the installation position of the water heater's heating element is biased towards the location of sensor 430 by comparing the acquisition time values ​​corresponding to the first wave of vibration signals collected by two vibration sensors (410 and 430) in the vertical direction.

[0071] Based on the direction of the offset of the heating element installation position of the water heater under test obtained above, the detector calculates that the product of 12μs and 340m / s is 4.08mm, thus determining that the offset of the heating element in that direction is 4.08mm. Similarly, the detector calculates that the product of 15μs and 340m / s is 5.1mm, thus determining that the offset of the heating element in that direction is 5.1mm.

[0072] The detector will feed back the horizontal offset value and specific offset direction, as well as the vertical offset value and specific offset direction, to the detection device. The detection device will then issue an alarm to notify the staff to correct the installation position of the heating element of the water heater under test based on the relevant data.

[0073] In this embodiment, when the installation position of the heating element of the water heater to be tested is inaccurate, the detector obtains the offset value of the heating element of the water heater to be tested in the horizontal direction based on the time difference value in the horizontal direction and the propagation speed corresponding to the vibration signal, and obtains the offset value of the heating element of the water heater to be tested in the vertical direction based on the time difference value in the vertical direction and the propagation speed corresponding to the vibration signal.

[0074] As can be seen, the correction data provided in this embodiment for correcting the installation position of the heating element in the water heater under test is more accurate than the existing technology where operators use calipers to measure the offset, which suffers from errors and inaccuracies. In this embodiment, the offset value of the heating element's installation position is determined more precisely by calculating the product of the time difference between the vibration signals collected by symmetrical vibration sensors in the same direction and the speed of sound propagation. Therefore, when the installation position of the water heater's inlet pipe is inaccurate, correction can be performed based on this precise data, resulting in a more accurate correction of the heating element's installation position.

[0075] Example 3

[0076] Figure 5 This is a flowchart illustrating another method for detecting the installation location of a water heater heating element provided in this application. Figure 5 As shown, the method includes:

[0077] Step 501: Control the vibration generator to strike the flange of the water heater under test to generate a vibration signal.

[0078] Step 502: Trigger the vibration sensor located at the center of the plane where the flange is located to collect the second vibration signal.

[0079] In this embodiment, when the vibration generator mentioned in the previous embodiment strikes the flange, it generates sound waves. At this time, the heating pipe connected to the flange vibrates, and the corresponding sound waves generated by the vibration of the heating pipe are transmitted to the inner liner through the heating pipe. During the transmission process, the inner liner absorbs some of the energy of the sound waves, and the remaining energy is reflected back. All the sound waves reflected back by the inner liner are partially absorbed by the heating pipe, thereby changing the vibration of the heating pipe. This causes the corresponding sound waves to change accordingly. The detector triggers the vibration sensor located at the center of the plane where the flange is located to collect the changed sound waves and convert them into a second vibration signal, which is then sent to the detector.

[0080] Furthermore, in this embodiment, after the detector controls the vibration generator to strike the flange, it will trigger the timer inside the detection device. When the detector detects that the cumulative value of the timer has reached the calibrated value, the detector will immediately trigger the vibration sensor at the center of the flange to collect the second vibration signal.

[0081] Figure 6 This is a schematic diagram illustrating the emitted and reflected waves of a vibration sound wave propagating from the flange of a water heater to the bottom of the inner tank, as provided in this application. Figure 6 As shown in the figure, curve 601 represents the emitted wave, and curve 602 represents the reflected wave after part of the emitted wave is absorbed by the inner liner.

[0082] Step 503: Obtain the frequency domain diagram and phase diagram of the second vibration signal.

[0083] In this embodiment, the detector processes the acquired second vibration signal using the Fourier transform method, converting the second vibration signal from a waveform representation into an amplitude diagram and a phase diagram representation.

[0084] Step 504: Compare the frequency domain with the preset frequency domain to obtain the correlation coefficient of the frequency domain.

[0085] Step 505: Compare the phase diagram with the preset phase diagram to obtain the phase correlation coefficient.

[0086] In this embodiment, the detector stores a preset frequency domain map and a preset phase map. These are obtained by detecting a water heater with the heating element correctly installed. The detector takes the amplitude and phase values ​​from the acquired frequency domain map. Since the second vibration signal is formed by the superposition of multiple reflected waves, a set of amplitude values ​​and a set of phase values ​​can be obtained. These are then combined with another set of amplitude values ​​from the preset frequency domain map and another set of phase values ​​from the preset phase map, and the correlation coefficient between the two sets is determined using the Pearson correlation coefficient method.

[0087] Step 506: If the correlation coefficient in the frequency domain is not within the preset frequency domain correlation coefficient range, and / or if the correlation coefficient in the phase is not within the preset phase correlation coefficient range, then it is determined that the heating element of the water heater to be tested is not installed accurately.

[0088] In this embodiment, the detector stores a preset frequency domain correlation coefficient range and a preset phase correlation coefficient range. These ranges are set based on the correlation strength characterized by the Pearson correlation coefficient. In this embodiment, the preset frequency domain correlation coefficient range and the preset phase correlation coefficient range are set to be between 0.9 and 1. A correlation coefficient range of 0.9 to 1 indicates a strong correlation.

[0089] In this embodiment, the detector triggers a vibration sensor positioned at the center of the flange plane to collect a second vibration signal. The frequency and phase maps of the second vibration signal are then compared with preset frequency and phase maps to obtain the correlation coefficients in the frequency and phase domains. If the correlation coefficient in the frequency domain is not within the preset range, and / or if the correlation coefficient in the phase is not within the preset range, the heating element of the water heater under test is determined to be inaccurately installed. Compared to existing technologies where workers rely on personal experience to determine the accuracy of the heating element installation, which involves significant errors, this embodiment uses a signal fitting method to process the collected second vibration signal, enabling more accurate detection of the heating element's installation position and thus ensuring the safety of the water heater.

[0090] Figure 7 This is a schematic diagram of the preset frequency diagram and preset phase diagram provided in this application, such as... Figure 7 As shown, Figure 7 (a) in the diagram represents the preset frequency domain diagram. Figure 7 (b) in the diagram represents the preset phase diagram, according to Figure 7 The ordinate values ​​in (a) are used to obtain the preset amplitude value data group, namely 1, 2, and 3. Figure 7 The ordinate values ​​in (b) are obtained from the preset phase value data group, namely 1, 2, and 3.

[0091] If the detector collects the second vibration signal of the water heater under test as sin(x+π)+2.3*sin(2*x+π / 2.2)+2.9*sin(3*x+π / 3.3), the detector performs Fourier transform processing on it to obtain the corresponding frequency domain diagram and phase diagram.

[0092] Figure 8 This is a schematic diagram of the frequency domain diagram and phase diagram after converting the second vibration signal of the water heater under test, as provided in this application. Figure 8 As shown, Figure 8 (a) represents the frequency domain diagram, based on Figure 8 The vertical axis values ​​in (a) provide the amplitude data set, namely 1, 2.3, and 2.9. Figure 8 (b) represents the phase diagram, according to Figure 8 The vertical coordinate values ​​in (b) can be used to obtain the phase value data set, namely 1, 2.2, and 3.3.

[0093] The detector processes the preset amplitude value data set and the amplitude value data set according to formula (1) using the Pearson correlation coefficient method to obtain the correlation coefficient in the frequency domain:

[0094]

[0095] In formula (1), x1 represents the preset amplitude value data set, x2 represents the amplitude value data set, cov(x1,x2) represents the covariance of the two amplitude value data sets, σx1σx2 represents the standard deviation of the two amplitude value data sets, and ρ(x1,x2) represents the correlation coefficient of the two amplitude value data sets.

[0096] Substituting the two sets of amplitude values ​​into formula (1), the correlation coefficient in the frequency domain is 1.

[0097] The detector processes the preset phase value data set and the phase value data set according to formula (2) using the Pearson correlation coefficient method to obtain the phase correlation coefficient:

[0098]

[0099] In formula (2), x3 represents the preset phase value data set, x2 represents the phase value data set, cov(x1,x2) represents the covariance of the two sets of phase value data, σx1σx2 represents the standard deviation of the two sets of phase value data, and ρ(x1,x2) represents the correlation coefficient of the two sets of phase value data.

[0100] Substituting the above two sets of amplitude values ​​into formula (2), the correlation coefficient in the frequency domain is 0.977.

[0101] In summary, if the detector determines that the frequency domain correlation coefficient 1 is within the preset frequency domain correlation coefficient range of 0.9-1, and the phase correlation coefficient 0.977 is within the preset frequency domain correlation coefficient range of 0.9-1, then the detector determines that the heating element of the water heater under test is installed accurately.

[0102] In this embodiment, the detector uses a signal fitting method to process the second vibration signal collected by the vibration sensor located at the center of the flange plane, obtaining the frequency domain diagram and phase diagram of the second vibration signal. Based on the Pearson correlation coefficient method, the correlation coefficient in the frequency domain and the correlation coefficient in the phase domain are obtained and compared with the corresponding preset correlation coefficient range to determine the accuracy of the heating element installation position of the water heater to be tested. Compared with the prior art where workers rely on personal experience to judge whether the heating element installation position is accurate, which has a large margin of error, this application can more accurately detect whether the heating element installation position is accurate, thereby ensuring the safety of the water heater.

[0103] Example 4

[0104] Figure 9 This is a schematic diagram of a detection device for the installation position of the heating element of a water heater provided in this application. For ease of explanation, only the parts relevant to this application are shown.

[0105] Reference Figure 9 The processing device includes a control module 10 and a detection module 20. The control module 10 controls a vibration generator to strike the flange of the water heater under test, generating a vibration sound wave. This triggers a vibration sensor located on the inner tank or flange of the water heater to collect and acquire the vibration signal corresponding to the sound wave. The detection module 20 processes the vibration signal using either a time difference method or a signal fitting method to determine whether the heating element of the water heater under test is installed accurately.

[0106] Optionally, the control module 10 is specifically used to trigger four vibration sensors evenly distributed around the center of the inner tank of the water heater to be tested to collect the first vibration signal.

[0107] Optionally, the detection module 20 is specifically used to acquire the first vibration signal collected by the four vibration sensors and the corresponding acquisition time, and to obtain the time difference in the horizontal direction based on the first wave vibration signal collected by the two vibration sensors in the horizontal direction and the corresponding acquisition time; and to obtain the time difference in the vertical direction based on the first wave vibration signal collected by the two vibration sensors in the vertical direction and the corresponding acquisition time.

[0108] Optionally, the detection module 20 is specifically used to determine that the heating element of the water heater under test is not installed accurately if the time difference in the horizontal direction is not within the first time difference threshold range and / or the time difference in the vertical direction is not within the second time difference threshold range.

[0109] Optionally, the control device 10 further includes a calculation module. This module is specifically used to obtain the offset value of the heating tube under test in the horizontal direction based on the time difference value in the horizontal direction and the propagation speed corresponding to the vibration signal; and to obtain the offset value of the heating tube in the vertical direction based on the time difference value in the vertical direction and the propagation speed corresponding to the vibration signal.

[0110] Optionally, the control module 10 is also specifically used to trigger a vibration sensor located at the center of the plane where the flange is located to collect a second vibration signal.

[0111] Optionally, the detection module 20 is further used to acquire the frequency domain diagram and phase diagram of the second vibration signal; compare the frequency domain diagram with a preset frequency domain diagram to obtain the frequency domain correlation coefficient; and then compare the phase diagram with a preset phase diagram to obtain the phase correlation coefficient. Furthermore, if the frequency domain correlation coefficient is not within the preset frequency domain correlation coefficient range, and / or if the phase correlation coefficient is not within the preset phase correlation coefficient range, then it is determined that the heating element of the water heater under test is installed inaccurately.

[0112] The implementation principle of the detection device provided in this application is similar to that in any of the above embodiments, and will not be described in detail here.

[0113] This application provides a device for detecting the installation position of the heating element in a water heater. It controls a vibrating generator to strike the flange of the water heater under test, generating a vibration signal. This triggers a vibration sensor located on the inner tank or flange of the water heater to collect the vibration signal. Then, using a signal time difference method or signal fitting method, the vibration signal is processed to determine the accuracy of the heating element's installation position. This method of detecting the heating element's installation position combines relevant instruments and algorithms into a detection system, avoiding the problem of personnel relying on personal experience to determine the accuracy of the heating element's installation position. This makes the detection more precise and thus ensures the safety of the water heater.

[0114] Example 5

[0115] The electronic device provided in this application can be used to execute the technical solutions of the above-described method embodiments. Figure 10 This is a schematic diagram of the hardware structure of the electronic device provided in this application. For ease of explanation, only the parts relevant to this application are shown.

[0116] refer to Figure 10The diagram illustrates a structural schematic suitable for implementing an electronic device 1000 according to an embodiment of this application. The electronic device 1000 can be a terminal device. The terminal device can include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, personal digital assistants (PDAs), portable Android devices (PADs), portable media players (PMPs), in-vehicle devices (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 7 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0117] like Figure 10 As shown, the electronic device 1000 may include an output device (e.g., a central processing unit, a graphics processor, etc.) 1007, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1008 into a random access memory (RAM) 1003. The RAM 1003 also stores various programs and data required for the operation of the electronic device 1000. The processing device 1001, ROM 1002, and RAM 1003 are interconnected via a bus 1004. An input / output (I / O) interface 1005 is also connected to the bus 1004.

[0118] Typically, the following devices can be connected to the I / O interface 1005: input devices 1006 including, for example, a touchscreen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices 1007 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1008 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows electronic device 1000 to exchange data via wireless or wired communication with other devices. Although Figure 10 An electronic device 1000 with various devices is shown; however, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0119] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication device 1009, or installed from storage device 1008, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of embodiments of this application.

[0120] This application provides a computer program product that, when run on an electronic device, causes the electronic device to execute the technical solutions described in the above embodiments. Its implementation principle and technical effects are similar to the related embodiments described above, and will not be repeated here.

[0121] This application provides a computer-readable storage medium storing program instructions. When executed by an electronic device, the program instructions cause the electronic device to perform the technical solution described in the above embodiments. Its implementation principle and technical effects are similar to the related embodiments described above, and will not be repeated here.

[0122] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A method for detecting the installation position of the heating element in a water heater, characterized in that, include: A vibration generator is controlled to strike the flange of the water heater under test, generating vibration sound waves; the vibration generator is installed on the flange. Four vibration sensors, evenly distributed around the center of the inner tank of the water heater under test, are triggered to collect and acquire the first vibration signal corresponding to the vibration sound wave. The first vibration signal collected by each of the four vibration sensors and the corresponding acquisition time are acquired. Based on the first wave vibration signal collected by two vibration sensors in the horizontal direction and the corresponding acquisition time, the time difference value in the horizontal direction is obtained. Based on the first wave vibration signal collected by two vibration sensors in the vertical direction and the corresponding acquisition time, the time difference value in the vertical direction is obtained. If the time difference value in the horizontal direction is not within a first time difference threshold range, and / or, the time difference value in the vertical direction is not within a second time difference threshold range, then it is determined that the heating element of the water heater under test is not installed accurately. or, A vibration sensor positioned at the center of the plane containing the flange of the water heater under test is triggered to collect a second vibration signal; the frequency domain diagram and phase diagram of the second vibration signal are obtained; the frequency domain diagram is compared with a preset frequency domain diagram to obtain the frequency domain correlation coefficient; the phase diagram is compared with a preset phase diagram to obtain the phase correlation coefficient; if the frequency domain correlation coefficient is not within the preset frequency domain correlation coefficient range, and / or if the phase correlation coefficient is not within the preset phase correlation coefficient range, then it is determined that the heating element of the water heater under test is not installed accurately.

2. The detection method according to claim 1, characterized in that, Also includes: Based on the time difference in the horizontal direction and the propagation speed corresponding to the vibration signal, the offset value of the heating element of the water heater under test in the horizontal direction is obtained; The offset value of the heating element of the water heater under test in the vertical direction is obtained based on the time difference in the vertical direction and the propagation speed corresponding to the vibration signal.

3. A device for detecting the installation position of the heating element in a water heater, characterized in that, include: The control module is used to control the vibrating sound generator to strike the flange of the water heater under test to generate a vibration signal; the vibrating sound generator is installed on the flange; and to trigger four vibration sensors evenly distributed around the center of the inner tank of the water heater under test to collect and acquire the first vibration signal corresponding to the vibration signal; or, to trigger a vibration sensor set at the center of the plane where the flange of the water heater under test is located to collect the second vibration signal. The detection module is used to acquire the first vibration signal collected by the four vibration sensors and the corresponding acquisition time; to acquire the time difference value in the horizontal direction based on the first wave vibration signal collected by the two vibration sensors in the horizontal direction and the corresponding acquisition time; to acquire the time difference value in the vertical direction based on the first wave vibration signal collected by the two vibration sensors in the vertical direction and the corresponding acquisition time; if the time difference value in the horizontal direction is not within a first time difference threshold range, and / or, the time difference value in the vertical direction is not within a second time difference threshold range, then it is determined that the heating element of the water heater under test is not installed accurately; or, to acquire the frequency domain diagram and phase diagram of the second vibration signal; to compare the frequency domain diagram with a preset frequency domain diagram to acquire the frequency domain correlation coefficient; to compare the phase diagram with a preset phase diagram to acquire the phase correlation coefficient; if the frequency domain correlation coefficient is not within the preset frequency domain correlation coefficient range, and / or, if the phase correlation coefficient is not within the preset phase correlation coefficient range, then it is determined that the heating element of the water heater under test is not installed accurately.

4. An electronic device, characterized in that, include: Processor, memory; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the detection method as described in claim 1 or 2.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the detection method of claim 1 or 2.

6. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method of claim 1 or 2.

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