A portable vibration meter with noise filtering function

Abstract

The invention discloses a portable vibration meter with a noise filtering function, and relates to the technical field of vibration meters. The invention is based on the basic principle of the vibration meter, and takes the collected vibration frequency and audio frequency as basic values ​​to form a blending method, which is specifically manifested as: using the conversion method between mechanical vibration and noise frequency to generate a difference value, re-converting the collected vibration frequency to obtain a corresponding frequency, establishing an X-Y curve model according to the re-generated corresponding frequency, identifying the corresponding bias in a curve display manner, and performing two actions of overlapping filtering or incremental supplementation according to the frequency value in the minimum bias position, and its purpose is to use a multi-layer calculation and data separation method to reduce the influence of vibration-noise on the overall measurement data, so as to improve the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of vibration meters, and in particular to a portable vibration meter with a noise filtering function. Background Art

[0002] Vibrometers are suitable for measuring conventional vibrations of mechanical equipment. They can measure vibration displacement, velocity and acceleration. They are widely used in mechanical manufacturing, electric power metallurgy, vehicles, general aerospace and other fields to measure data such as amplitude, velocity, acceleration and frequency of vibration systems in mechanical equipment. The principle is: it is designed using the piezoelectric effect of quartz crystals and artificially polarized ceramics (PZT). When quartz crystals or artificially polarized ceramics are subjected to mechanical stress (vibration), electric charges are generated on their surfaces. The size of the charge density formed is strictly linearly related to the size of the applied mechanical stress, and the corresponding value is thus calculated.

[0003] It should be noted that during the operation of larger equipment, its own mechanical stress indirectly generates greater noise. The noise propagates in the air environment and also indirectly generates a sense of vibration, making the overall working environment noisy. The vibration generated by the noise in the working environment and the mechanical stress act on the quartz crystal or artificially polarized ceramic at the same time, which directly affects the calculated numerical value. There is a deviation between the calculated numerical value and the actual numerical value.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a portable vibration meter with a noise filtering function. When the vibration meter is actually used, the air vibration generated by the noise generated during the operation of the tested equipment will also act on the position of the detection head on the vibration meter, directly affecting the calculated value.

[0006] The purpose of the present invention can be achieved by the following technical scheme: a portable vibration meter with noise filtering function, which is composed of a vibration meter body, a detection probe and a sound receiving head, wherein the sound receiving head is installed on the outer wall of the detection probe, and the vibration meter body contains a data collection module, a multi-layer calculation module and a data separation module, and a data wire is connected between the detection probe and the sound receiving head and the data collection module;

[0007] The data collection module is used to record the vibration frequency collected by the detection probe and the audio frequency collected by the sound receiving head, and send the collected vibration frequency and audio frequency to the multi-layer calculation module;

[0008] The multi-layer calculation module performs a calculation action after receiving the vibration frequency and the audio frequency. The calculation action includes a primary calculation stage, a secondary calculation stage and a summary calculation stage. The primary calculation stage uses the vibration frequency as a calculation parameter, the secondary operation stage uses the audio frequency as a calculation parameter, and the vibration frequency and the audio frequency are combined to form a combined frequency value through a blending method. The summary operation stage uses the combined frequency value of the vibration frequency and the audio frequency as a calculation parameter, and obtains a first-order peak value, a second-order peak value and a combined peak value in the primary calculation stage, the secondary calculation stage and the summary operation stage, respectively. The multi-layer calculation module sends the first-order peak value, the second-order peak value, the combined peak value and the calculation method of the calculation action to the data separation module;

[0009] After receiving the first-order peak value, the second-order peak value, the blending peak value and the calculation method of the calculation action, the data separation module performs a splitting operation on the operation method according to the blending method, and the splitting operation is applied to the summary operation stage. In the summary operation stage, a coincidence model and a return model are generated, and an XY curve model is jointly established with the coincidence model and the return model, wherein the unit of the X-axis is the audio frequency or the vibration frequency, wherein the unit of the Y-axis is the charge value, and there are four real-time curves in the XY curve model, and the bias between the four real-time curves is identified in the XY curve model, and the lower limit value in the bias is extracted, and the lower limit value is sent to the blending method to regenerate the real-time vibration frequency, and the real-time vibration frequency is the value displayed on the vibration meter.

[0010] It is further set as follows: a charge-frequency correlation formula is established in the primary operation stage, the secondary operation stage and the summary operation stage in the calculation action, and the charge value is calculated using the audio frequency, the vibration frequency and the mixed frequency as the variable values ​​in the charge-frequency correlation formula, and the charge value increases proportionally to the variable value, wherein the audio frequency is less than the vibration frequency, the mixed frequency value is greater than the audio frequency, and the mixed frequency value is less than the vibration frequency or the mixed frequency value is greater than the vibration frequency.

[0011] It is further configured as follows: the blending method includes an equal-rate conversion formula between the vibration frequency and the audio frequency, and a difference conversion formula between the vibration frequency and the audio frequency. In the equal-rate conversion formula, the vibration frequency is used as a conversion variable and the ideal audio frequency is calculated. A difference rate value is generated according to the ideal audio frequency and the audio frequency calculation. The difference rate value is substituted into the difference conversion formula, and the audio frequency and the vibration frequency are subjected to two separation actions of differential increase or differential subtraction using the difference rate value. The two separation actions of differential increase or differential subtraction correspond to the overlap degree model and the return degree model, respectively.

[0012] It is further set as follows: in the two separate actions of differential increase or differential decrease, the formed blended frequency convergence value includes the first-order frequency and the second-order frequency, and the blended peak value includes the first-order charge value and the second-order charge value, wherein the first-order frequency is equal to the sum of the vibration frequency and the multiple of the vibration frequency and the differential value, the second-order frequency is equal to the absolute value of the difference between the vibration average age and the multiple of the vibration frequency and the differential value, and the first-order frequency is the variable value in the coincidence model, the second-order frequency is the variable value in the return model, and the first-order charge value and the second-order charge value are obtained in the coincidence model and the return model respectively.

[0013] It is further set as follows: in the XY curve model, the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value are substituted into the XY curve model, the four real-time curves correspond to the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value respectively, the four real-time curves are divided into multiple working nodes along the X-axis direction, the distance between each real-time curve along the Y-axis in each working node is set as the bias degree, the bias degree takes an absolute value, the first-order frequency and the second-order frequency in the lower limit value are extracted, and are combined with the vibration frequency and the audio frequency in the working node, the vibration frequency and the audio frequency are used as variable constants, and the difference value between the first-order frequency and the second-order frequency is used to perform two actions of overlap filtering or incremental supplement on the vibration frequency to obtain the real-time vibration frequency.

[0014] The present invention has the following beneficial effects:

[0015] 1. The present invention is based on the operating principle of the vibration meter, takes the collected vibration frequency and audio frequency as the measurement reference, and takes the mutual influence relationship between the mechanical vibration and the noise frequency to calculate the vibration frequency and the audio frequency, and simultaneously blends the vibration frequency and the audio frequency. The blending method is specifically manifested as: establishing a conversion formula between the mechanical vibration and the noise frequency, so that the vibration frequency is the precursor value and the audio frequency is the follower value, and the audio frequency in the vibration frequency is "filtered" in the form of a difference, the purpose of which is to reduce the influence of noise in the external working environment on the overall measurement data;

[0016] 2. In combination with the above content, the process of "filtering" noise in the overall solution is different: because the vibration frequency and the audio frequency are in a state of mutual influence, that is, the vibration "acts" on the external environment to generate noise frequency, and the noise frequency of the external environment reversely "acts" on the equipment to aggravate the vibration frequency. Therefore, the "filtering" method is mainly reflected in: the ideal audio value is obtained by preliminary conversion of the vibration frequency, the difference value is established with the ideal audio value and the audio value, and the difference value is applied to the coincidence model and the return model, combined with the first-order peak and the second-order peak to generate an XY curve model composed of four real-time curves, and the offset between each real-time curve is used to "judge" the minimum error position, and the two actions of coincidence filtering or incremental supplementation are re-executed with the relevant parameters of the position, in order to obtain a more accurate real-time vibration frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0018] Figure 1 A schematic diagram of the structure of a portable vibration meter with noise filtering function proposed by the present invention;

[0019] Figure 2 This is an operation block diagram of a portable vibration meter with noise filtering function proposed by the present invention;

[0020] Figure 3 This is a graph of an XY curve model in a portable vibration meter with a noise filtering function proposed by the present invention.

[0021] In the figure: 1. Vibrometer body; 2. Detection probe; 3. Sounding head. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1

[0024] The basic principle of the vibration meter is to feedback the value of the vibration frequency of the equipment by the charge change when the vibration frequency of the mechanical equipment acts on the quartz crystal or artificially polarized ceramic during operation. However, the vibration waves generated by the mechanical vibration process will also react to the external working environment, thereby causing noise due to air friction caused by the vibration waves, or the noise in the working environment will act back on the mechanical equipment, resulting in a difference between the calculated value and the actual value. For this reason, the following technical solution is proposed:

[0025] A portable vibration meter with a noise filtering function in this embodiment is composed of a vibration meter body 1, a detection probe 2 and a sound receiving head 3. The sound receiving head 3 is installed on the outer wall of the detection probe 2. The vibration meter body 1 contains a data collection module, a multi-layer calculation module and a data separation module. A data wire is connected between the detection probe 2 and the sound receiving head 3 and the data collection module.

[0026] The data collection module is used to record the vibration frequency collected by the detection probe 2 and the audio frequency collected by the sound receiving head 3, and send the collected vibration frequency and audio frequency to the multi-layer calculation module;

[0027] The multi-layer calculation module performs a calculation action after receiving the vibration frequency and the audio frequency. The calculation action includes a primary calculation stage, a secondary calculation stage and a summary calculation stage. The primary calculation stage uses the vibration frequency as a calculation parameter, the secondary operation stage uses the audio frequency as a calculation parameter, and the vibration frequency and the audio frequency are combined to form a combined frequency value through a blending method. The summary operation stage uses the combined frequency value of the vibration frequency and the audio frequency as a calculation parameter, and obtains a first-order peak value, a second-order peak value and a combined peak value in the primary calculation stage, the secondary calculation stage and the summary operation stage respectively. The multi-layer calculation module sends the first-order peak value, the second-order peak value, the combined peak value and the calculation method of the calculation action to the data separation module;

[0028] After receiving the first-order peak value, the second-order peak value, the blending peak value and the calculation method of the calculation action, the data separation module performs a splitting operation on the operation method according to the blending method, and the splitting operation is applied to the summary operation stage. In the summary operation stage, a coincidence model and a return model are generated, and an XY curve model is jointly established with the coincidence model and the return model, wherein the unit of the X-axis is the audio frequency or the vibration frequency, wherein the unit of the Y-axis is the charge value, and there are four real-time curves in the XY curve model, and the bias between the four real-time curves is identified in the XY curve model, and the lower limit value in the bias is extracted, and the lower limit value is sent to the blending method to regenerate the real-time vibration frequency, and the real-time vibration frequency is the value displayed on the vibration meter.

[0029] Operating principle: During the operation of the vibration meter proposed in the present invention, refer to Figure 1, the detection probe 2 is adsorbed on the inspected position of the device to be detected, and the mechanical vibration frequency generated during the operation of the device to be detected can be fed back to the overall data collection module through the detection probe, and in order to facilitate the synchronous collection of the noise frequency in the working environment, the sound receiving head 3 and the detection probe 2 are located relatively close to each other, so as to collect the working environment noise frequency around the device to be detected;

[0030] What needs to be briefly explained is that after collecting the vibration frequency and audio frequency, the vibration frequency and audio frequency are assigned respectively: and , and According to the operation process of the equipment to be tested, it changes and establishes This formula, in which is the charge value calculated in the vibrometer, and is the conversion factor in this formula, and It depends on the quartz crystal or artificial polarization ceramic material of the vibrometer, which is not limited here. and Substitute into The first-order peak value and the second-order peak value can be calculated separately, and the first-order peak value and the second-order peak value can be set as and ;

[0031] In combination with the above content, it should be noted that: because the noise in the working environment is affected by the mechanical vibration during the operation of the equipment to be tested, > , so the and It cannot be used as an accurate value of the vibration meter. and The blending method is used to calculate the blending peak value, which is mainly used to establish the XY model in the data separation module. This formula is used to illustrate that and There is an obvious proportional growth between them, so the essence of the XY model is a proportional function. The difference is that and The difference between and The two real-time curves established can be understood as: This real-time curve is based on They are offset upwards for a certain distance, and the two are in an intermittent parallel state;

[0032] To this end, it is necessary to use a blending method to split the overall calculation action, mainly applied to the summary calculation stage. and Two other real-time curves are "regenerated" between the two established real-time curves. The other two real-time curves are not in an intermittent parallel state, or there is an intersection between the other two real-time curves, which corresponds to the above-mentioned bias. The bias contains positive and negative values. The other two real-time curves are always located and The two real-time curves established are recalculated with the relevant values ​​on the X-axis at the intersection position. is the predecessor value, It is the post-drive value, which filters out the noise frequency in the working environment and reduces the impact on the overall measurement process.

[0033] Embodiment 2

[0034] This embodiment explains the blending method proposed in the first embodiment:

[0035] A charge-frequency correlation formula is established in the primary operation stage, the secondary operation stage and the summary operation stage in the calculation action, and the charge value is calculated using the audio frequency, the vibration frequency and the combined frequency as the variable values ​​in the charge-frequency correlation formula. The charge value increases proportionally to the variable values, wherein the audio frequency is less than the vibration frequency, the combined frequency value is greater than the audio frequency, and the combined frequency value is less than the vibration frequency or the combined frequency value is greater than the vibration frequency.

[0036] The blending method includes an equal-rate conversion formula between vibration frequency and audio frequency, and a difference conversion formula between vibration frequency and audio frequency. In the equal-rate conversion formula, the vibration frequency is used as a conversion variable and the ideal audio frequency is calculated. A difference rate value is generated based on the ideal audio frequency and the audio frequency. The difference rate value is substituted into the difference conversion formula, and the audio frequency and vibration frequency are subjected to two separation actions of differential increase or differential subtraction using the difference rate value. The two separation actions of differential increase or differential subtraction correspond to the overlap degree model and the return degree model respectively.

[0037] Technical advantages: Combined with the technical content of Example 1, the vibration waves generated by the mechanical equipment during operation act on the working environment and generate noise and vibration. Similarly, the noise in the external working environment will also act back on the mechanical equipment, so the noise collected in Example 1 In a "chaotic" state, the technical points of this embodiment are proposed:

[0038] First, directly use the collected vibration frequency Reverse calculation to get the ideal audio frequency ,like: , among which is the air vibration propagation coefficient, and > , but among them and are not equal, so it is necessary to establish a differential value between the two The calculation formula is: , for this purpose, we need to use the difference value right Perform difference conversion. The difference conversion process includes two separate actions: difference increase and difference subtraction:

[0039] Differential action: Establishment , where is the predecessor value, Variables are added to recalculate the multi-layer calculation modules in the overall vibration meter, including As the first-order frequency in the calculation action;

[0040] Subtraction action: Establishment , where is the predecessor value, Variables are added to recalculate the multi-layer calculation modules in the overall vibration meter, including As the second-order frequency in the calculation action;

[0041] The calculated and Substitute again into In the above example, we can recalculate and , among which Relative to Upward deviation This skewness value, however > , < or > , thus This real-time curve comparison , and In the XY curve model, an XY curve model is formed, which can be displayed intuitively from the XY curve model.

[0042] Embodiment 3

[0043] This embodiment combines the technical content in the second embodiment to explain the XY curve model:

[0044] In the two separation actions of differential increase or differential decrease, the formed blended frequency value includes the first-order frequency and the second-order frequency, and the blended peak value includes the first-order charge value and the second-order charge value, wherein the first-order frequency is equal to the sum of the vibration frequency and the multiple of the vibration frequency and the differential value, and the second-order frequency is equal to the absolute value of the difference between the vibration frequency and the multiple of the vibration frequency and the differential value, and the first-order frequency is the variable value in the coincidence model, and the second-order frequency is the variable value in the return model, and the first-order charge value and the second-order charge value are obtained in the coincidence model and the return model respectively, and in the XY curve model, the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value are added. The load value is substituted into the XY curve model. The four real-time curves correspond to the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value respectively. The four real-time curves are divided into multiple working nodes along the X-axis direction. In each working node, the distance between each real-time curve along the Y-axis is set as the bias degree. The bias degree takes an absolute value, and the first-order frequency and the second-order frequency in the lower limit value are extracted and combined with the vibration frequency and the audio frequency in the working node. The vibration frequency and the audio frequency are used as variable constants, and the difference value between the first-order frequency and the second-order frequency is used to perform two actions of overlap filtering or incremental supplement on the vibration frequency to obtain the real-time vibration frequency.

[0045] Technical advantages: Reference Figure 3 As the equipment to be tested continues to operate until it becomes stable, the vibration frequency generated inside the equipment to be tested tends to be stable. Theoretically, it is calculated that , , and Gradually tends to be stable. What needs to be explained is that during the operation of the equipment to be tested, the vibration sense inside the equipment tends to be stable, but the noise frequency in the external working environment changes unevenly, and combined with Figure 3 From the XY curve model in the figure, we can find that the curve of the second-order charge value is at the bottom, and the curve of the first-order peak is higher than the second-order peak. The only difference is the curve of the first-order charge value, because Substitute into The calculation process is: ρ ( 2 ) = [ f ( z ) * G + f ( y ) ] * k , where the difference rate value This change causes the curve of the second-order charge value to be not relatively parallel to the first-order peak value and the first-order charge value. In the corresponding working node, there is an intersection between the curve of the second-order charge value and the curve of the first-order peak value. The key is: when the device to be tested tends to be stable, Figure 3 Mark the intersection point in the middle and substitute the charge value on the Y axis of the intersection point into , calculated in reverse , where the charge value obtained by reverse calculation is , combined with This formula forms , measured in the working node and As a conversion formula, reverse calculation is used to obtain , and then calculate , the real-time vibration frequency displayed on the vibration meter is: - .

[0046] In summary: Based on the basic principle of the vibration meter, the collected vibration frequency and audio frequency are used as basic values ​​to form a blending method, which is specifically manifested as: using the conversion method between mechanical vibration and noise frequency to generate a difference value, so as to reconvert the collected vibration frequency to obtain the corresponding frequency, and establish an XY curve model according to the regenerated corresponding frequency, and identify the corresponding offset in the form of a curve display, and perform two actions of overlapping filtering or incremental supplementation according to the frequency value in the minimum offset position. The purpose is to use multi-layer calculation and data separation to reduce the impact of vibration and noise on the overall measurement data, so as to improve the measurement accuracy.

[0047] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A portable vibration meter with noise filtering function, characterized in that: The device is composed of a vibration measuring instrument body (1), a detection probe (2) and a sound receiving head (3), wherein the sound receiving head (3) is mounted on the outer wall of the detection probe (2), the vibration measuring instrument body (1) contains a data collection module, a multi-layer calculation module and a data separation module, and a data wire is connected between the detection probe (2) and the sound receiving head (3) and the data collection module; The data collection module is used to record the vibration frequency collected by the detection probe (2) and the audio frequency collected by the sound receiving head (3), and send the collected vibration frequency and audio frequency to the multi-layer calculation module; The multi-layer calculation module performs a calculation action after receiving the vibration frequency and the audio frequency. The calculation action includes a primary calculation stage, a secondary calculation stage and a summary calculation stage. The primary calculation stage uses the vibration frequency as a calculation parameter, the secondary operation stage uses the audio frequency as a calculation parameter, and the vibration frequency and the audio frequency are combined to form a combined frequency value through a blending method. The summary operation stage uses the combined frequency value of the vibration frequency and the audio frequency as a calculation parameter, and obtains a first-order peak value, a second-order peak value and a combined peak value in the primary calculation stage, the secondary calculation stage and the summary operation stage, respectively. The multi-layer calculation module sends the first-order peak value, the second-order peak value, the combined peak value and the calculation method of the calculation action to the data separation module; After receiving the first-order peak value, the second-order peak value, the blending peak value and the calculation method of the calculation action, the data separation module performs a splitting operation on the operation method according to the blending method, and the splitting operation is applied to the summary operation stage, and a coincidence model and a return model are generated in the summary operation stage, and an XY curve model is jointly established with the coincidence model and the return model, wherein the unit of the X-axis is the audio frequency or the vibration frequency, wherein the unit of the Y-axis is the charge value, and there are four real-time curves in the XY curve model, and the bias between the four real-time curves is identified in the XY curve model, and the lower limit value in the bias is extracted, and the lower limit value is sent to the blending method, and the real-time vibration frequency is regenerated, and the real-time vibration frequency is the value displayed on the vibration meter; The blending method includes an equal-rate conversion formula between the vibration frequency and the audio frequency, and a difference conversion formula between the vibration frequency and the audio frequency. In the equal-rate conversion formula, the vibration frequency is used as a conversion variable to calculate the ideal audio frequency, and a difference value is generated according to the ideal audio frequency and the audio frequency. The difference value is substituted into the difference conversion formula, and the audio frequency and the vibration frequency are subjected to two separation actions of difference increase or difference subtraction. The two separation actions of difference increase or difference subtraction correspond to the overlap degree model and the return degree model respectively. In the two separation actions of differential increase or differential decrease, the formed blended frequency convergence value includes the first-order frequency and the second-order frequency, and the blended peak value includes the first-order charge value and the second-order charge value, wherein the first-order frequency is equal to the sum of the vibration frequency and the multiple of the vibration frequency and the differential value, and the second-order frequency is equal to the absolute value of the difference between the vibration frequency and the multiple of the vibration frequency and the differential value, and the first-order frequency is the variable value in the coincidence degree model, and the second-order frequency is the variable value in the return degree model, and the first-order charge value and the second-order charge value are obtained in the coincidence degree model and the return degree model respectively; In the XY curve model, the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value are substituted into the XY curve model, and the four real-time curves correspond to the first-order peak value, the second-order peak value, the first-order charge value and the second-order charge value respectively. The four real-time curves are divided into multiple working nodes along the X-axis direction. In each working node, the distance between each real-time curve along the Y-axis is set as the bias degree, and the bias degree takes an absolute value. The first-order frequency and the second-order frequency in the lower limit value are extracted and combined with the vibration frequency and the audio frequency in the working node. The vibration frequency and the audio frequency are used as variable constants, and the difference value between the first-order frequency and the second-order frequency is used to perform two actions of overlap filtering or incremental supplement on the vibration frequency to obtain the real-time vibration frequency.

2. A portable vibration meter with noise filtering function according to claim 1, characterized in that: A charge-frequency correlation formula is established in the primary operation stage, the secondary operation stage and the summary operation stage in the calculation action, and the charge value is calculated using the audio frequency, the vibration frequency and the combined frequency as the variable values ​​in the charge-frequency correlation formula. The charge value increases proportionally to the variable values, wherein the audio frequency is less than the vibration frequency, the combined frequency value is greater than the audio frequency, and the combined frequency value is less than the vibration frequency or the combined frequency value is greater than the vibration frequency.

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