Method for directly converting vibration quantity into voltage signal by converter

Abstract

The invention relates to the field of electrical variable measurement, in particular to a method for directly converting vibration quantity into voltage signals by a converter, which comprises the following steps of: 1, firstly, detecting the vibration quantity, and transmitting the detected vibration quantity to a processing module by an acceleration sensor; the plurality of processing modules connected in parallel are electrically connected with the first voltage source module and the second voltage source module; 2, the vibration quantity is processed, a frequency width filtering module, a vibration magnitude calculation module and a vibration magnitude conversion voltage signal module of a processing module sequentially process the vibration quantity, an acceleration total root mean square value grms is obtained, and the processing module comprises a current source module; and 3, converting the total root mean square value grms of the acceleration into a control signal and outputting the control signal to a programmable controller of the equipment. According to the method for directly converting the vibration quantity into the voltage signal by the converter, the size of the converter is reduced, the operation difficulty of the converter is reduced, and the cost of the converter is saved.

Description

Technical Field

[0001] The present invention relates to the field of measuring electric variables, and in particular to a method for a converter to directly convert vibration quantity into a voltage signal. Background Art

[0002] The vibration signal acquisition and processing process consists of three steps: acquisition, amplification, and filtering. During the acquisition process, the analog signal from the vibration sensor needs to be converted into a digital signal for subsequent processing. During the amplification process, the signal needs to be amplified to an appropriate range. The filtering process removes noise and useless information from the signal, improving signal quality and output characteristics.

[0003] Vibration signal acquisition requires vibration acceleration sensors and signal acquisition analyzers, which are implemented through sensors, signal processing units, and data display and analysis systems. The hardware quantity is large and the hardware volume is relatively complex. There is a technical problem that the vibration signal acquisition converter is large in size. It is urgent to design a new converter to directly convert the vibration quantity into a voltage signal.

[0004] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for a converter to directly convert vibration quantity into a voltage signal to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The method for converting vibration directly into a voltage signal by a converter includes the following steps:

[0008] Step 1: First, the vibration amount is detected, and the acceleration sensor transmits the detected vibration amount to the processing module. The plurality of processing modules connected in parallel are electrically connected to the first voltage source module and the second voltage source module;

[0009] Step 2: Process the vibration amount. The frequency width filtering module, the vibration magnitude calculation module, and the vibration magnitude conversion voltage signal module of the processing module sequentially process the vibration amount to obtain the total root mean square value of acceleration grms. The processing module includes a current source module.

[0010] Step 3: Convert the total root mean square value of acceleration grms into a control signal and output it to the programmable controller of the device;

[0011] The formula for calculating the total root mean square value grms of the flat spectrum is as follows:

[0012] Formula for thrust (F): F = (m0 + m1 + m2 + ...) A ................................... Formula (1);

[0013] Where: F is the thrust (exciting force) (N), m0 is the effective mass of the moving part of the vibration table (kg), m1 is the mass of the auxiliary table (kg), m2 is the mass of the specimen (including the fixture and mounting screws) (kg); A is the experimental acceleration (m / s 2 );

[0014] The interchangeable calculation formula of the three vibration parameters of acceleration (A), velocity (V), and displacement (D) is: A = ωv... Formula (2);

[0015] Where: A—experimental acceleration (m / s 2 ), V—experimental velocity (m / s), ω=2πf (angular velocity), where f is the experimental frequency (Hz);

[0016] V=ωD×10 -3 ………………Formula (3);

[0017] Where: D—displacement (mm 0-p ) Single peak;

[0018] A=ω 2 D×10 -3 …………… Formula (4);

[0019] The calculation formula for the smooth crossover point frequency of the fixed vibration level sweep frequency test, the calculation formula for the smooth crossover point frequency of acceleration and velocity:

[0020]

[0021] Where: f A-V —Frequency of the smooth crossover point between acceleration and velocity (Hz);

[0022] The calculation formula for the frequency of the smooth crossover point between velocity and displacement is:

[0023] Where: f V-D —Frequency of the smooth crossover point between acceleration and velocity (Hz);

[0024] The calculation formula for the frequency of the smooth crossover point of acceleration and displacement is:

[0025] Where: f A-D —Frequency of the smooth crossover point between acceleration and displacement (Hz);

[0026] The calculation formula for scanning time and scanning speed: Linear scanning is relatively simple:

[0027] Where: S1—scanning time (s or min), f H -f L —Scanning broadband, where f H is the upper frequency limit, f L is the lower limit frequency (Hz), V1—scanning speed (Hz / min or Hz / s);

[0028] Logarithmic sweep: Octave calculation formula:

[0029] Where: n—octave (oct), f H —Upper frequency (Hz), f L —Lower frequency limit (Hz);

[0030] Scanning speed calculation formula:

[0031] Where: R—scanning speed (oct / min), f H —Upper frequency (Hz), f L —Lower frequency limit (Hz), T—scanning time;

[0032] Scanning time calculation formula: T = n / R……………………Formula (11);

[0033] Where: T is scanning time (min or s), n is octave (oct), R is scanning speed (oct / min or oct / s);

[0034] The calculation formula frequently used in random vibration experiments is: Frequency resolution calculation formula:

[0035]

[0036] Where: △f—frequency resolution (Hz), f max —Highest operating frequency, N—number of spectral lines (number of lines), f max is an integer multiple of △f;

[0037] Calculation of the total RMS value of random vibration acceleration: (1) Using the ascending spectrum, descending spectrum and flat spectrum calculation formula: A2 = W·△f = W×(f1-f b )………………Flat spectrum calculation formula;

[0038] ………… Rising spectrum calculation formula;

[0039] ……………… spectrum reduction calculation formula;

[0040] Where: m = N / 3, N is the slope of the spectrum (dB / octive), assuming N = 3, then n = 1;

[0041] The following spectrum calculation formula is adopted:

[0042] Total RMS acceleration:

[0043] In an optional embodiment, the plurality of processing modules are separately encapsulated so that signals between the plurality of processing modules are isolated;

[0044] The first voltage source module and the second voltage source module are both direct current voltage sources.

[0045] In an optional embodiment, there are four processing modules.

[0046] The first voltage source module and the second voltage source module are located outside the packaged processing module.

[0047] In an optional embodiment, the current source module, the frequency width filtering module, the vibration magnitude calculation module, and the vibration magnitude conversion voltage signal module are electrically connected in sequence;

[0048] One end of the current source module is electrically connected to the first voltage source module, and the other end of the current source module is electrically connected to the frequency width filtering module, the vibration magnitude calculation module, and the vibration magnitude conversion voltage signal module in sequence;

[0049] The second voltage source module is electrically connected to the vibration magnitude calculation module and the vibration magnitude conversion voltage signal module in sequence.

[0050] In an optional embodiment, the processing module further includes an input port electrically connected to the frequency width filtering module;

[0051] The input port is connected in parallel with the current source module.

[0052] The beneficial effects of the present invention are: providing a method for a converter to directly convert vibration quantity into a voltage signal, by using a first voltage source module, a second voltage source module, a current source module, a frequency width filtering module, a vibration magnitude calculation module and a vibration magnitude conversion voltage signal module in conjunction with each other, a method for producing a converter to directly convert vibration quantity into a voltage signal to replace a bulky vibration signal acquisition converter, achieving the effect of converting vibration signals into voltage signals with simple hardware, reducing the volume of the converter, reducing the difficulty of operating the converter, and saving the cost of the converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 This is a structural diagram of the six functional modules of the converter provided in an embodiment of the present disclosure.

[0055] Figure 2 This is a design diagram of the functional module working principle of the method for the converter provided in an embodiment of the present disclosure to directly convert vibration quantity into a voltage signal.

[0056] Figure 3 This is a technical rendering of the functional module equivalent circuit of the method for the converter provided in an embodiment of the present disclosure to directly convert vibration quantity into a voltage signal.

[0057] Figure 4 A PCB layout design diagram for a method in which a converter according to an embodiment of the present disclosure directly converts vibration into a voltage signal.

[0058] Figure 5 Four vibration input channels and signal output channel planning diagram for the method of directly converting vibration quantity into voltage signal provided by the converter of the embodiment of the present disclosure

[0059] Figure 6 A power spectrum density curve diagram of the method for directly converting vibration quantity into a voltage signal by the converter provided in an embodiment of the present disclosure.

[0060] Figure 7 This is another power spectrum density curve diagram of the method for the converter provided by the embodiment of the present disclosure to directly convert vibration quantity into a voltage signal.

[0061] In the figure: 1. First voltage source module;

[0062] 2. A second voltage source module;

[0063] 3. Processing module;

[0064] 4. Current source module;

[0065] 5. Frequency width filtering module;

[0066] 6. Module for calculating vibration magnitude;

[0067] 7. Vibration level conversion voltage signal module. DETAILED DESCRIPTION

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0069] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or that a third component may be interposed between the first component and the second component. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe technical content.

[0070] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." when following a list of elements modify the entire list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0071] The terms used herein are intended only to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a," "an," and "the" may also be intended to include the plural forms, unless the context clearly indicates otherwise. The terms "include," "comprise," and "have" are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0072] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0073] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0074] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0075] refer to Figures 1 to 7 At least one embodiment provides a method for a converter to directly convert vibration quantity into a voltage signal, including a first voltage source module 1; a second voltage source module 2; a processing module 3; the first voltage source module 1 and the second voltage source module 2 are both electrically connected to the processing module 3; several of the processing modules 3 are connected in parallel to process multiple signals simultaneously; several of the processing modules 3 include a current source module 4, a frequency width filtering module 5, a vibration magnitude calculation module 6 and a vibration magnitude conversion voltage signal module 7 to calculate the vibration quantity as a voltage signal.

[0076] Functional description of each module: The first voltage source module 1 receives 24V DC power and outputs a 10V DC operating voltage VCC2 to the current source module 4, the vibration magnitude calculation module 6, and the vibration magnitude conversion voltage signal module 7. The second voltage source module 2 receives 24V DC power and outputs a 10V DC operating voltage VCC1 to the vibration magnitude calculation module 6 and the vibration magnitude conversion voltage signal module 7. The current source module 4 provides a constant current source to power the voltage-type vibration accelerometer, outputting a constant current of 2mA. The voltage-type vibration accelerometer is fixed to the object being measured. Vibration on the object causes the resistance of the IC circuit within the voltage-type vibration accelerometer to change. The voltage-type vibration accelerometer outputs a physical magnitude (Grms) to the converter, a voltage signal ranging from 0 to 200 Grms, exhibiting a linearly increasing characteristic with a voltage range of 0 to 10V. The frequency-width filtering module 5 applies AC coupling filtering to the electrical signal input from the voltage-type vibration accelerometer. Because the measured signal contains both AC and DC components, AC coupling filtering transforms the signal into a valid standard sine wave with a ±1.2V sine wave referenced to 0V. This is then passed to the vibration magnitude calculation module 6 for total Grms calculation. The frequency-width filtering module 5 also applies frequency-width filtering to the electrical signal input from the voltage-type vibration accelerometer, setting the valid calculation frequency-width range to 0 to 10,000Hz. This is then passed to the vibration magnitude calculation module 6 for total Grms calculation. The vibration magnitude calculation module 6 receives the 0-10,000Hz sinusoidal signal from the frequency-width filtering module 5 and calculates the vibration magnitude (Grms). The flat spectrum calculation formula is used to calculate the total root mean square value of acceleration grms, and the result of the calculation method is used as the vibration signal magnitude estimation; the algebraic calculation method is adopted, and only a small number of equivalent circuits of ordinary electronic components are needed to meet the application of vibration control and monitoring signals of the equipment, reducing the volume of the converter; the vibration magnitude conversion voltage signal module 7 will perform signal conversion and amplification processing on the calculation result of the vibration magnitude grms output by the vibration magnitude module 6, and convert the calculated value of the vibration magnitude signal grms into a 0~10V voltage control signal.

[0077] In some embodiments, the working principle of the present invention is as follows: using a flat spectrum calculation formula: using algebra to calculate the total root mean square value of acceleration grms, the result of the calculation is used as the vibration signal magnitude estimate; the sum of the areas of the power spectrum density diagram (PSD) is grms, the horizontal direction of the diagram is the frequency range (Hz), and the vertical direction is the power spectrum density (g2 / Hz), in order to use algebra to calculate the total grms; the power spectrum density diagram is divided into hypothetical rectangles and triangles, and the frequency range is directly set to 10000 (Hz); each 1 (Hz) is used as the minimum equal division for calculation; for example: the power spectrum density height value (g2 / Hz) corresponding to the frequency range 0-1 (Hz) is directly calculated using the rectangle area formula: width multiplied by height to obtain the area value A1-1. The power spectrum density height value (g2 / Hz) corresponding to the frequency range 1-2 (Hz) is directly calculated using the rectangle area formula: width multiplied by height to obtain the area value A2-1. Similarly, calculate the area value of A10000-1 and use algebra to calculate the total grms; that is, sum the area values of A1-1 to A10000-1 to get the area of the rectangle. To calculate the area of a triangle, for example, the power spectrum density height value (g2 / Hz) corresponding to the frequency range of 0 to 1 (Hz) has an increasing or decreasing slope in the power spectrum density height value. Simply use the triangle area formula: multiply the width (frequency range of 0 to 1) by the height (corresponding power spectrum density height value). Use the increasing slope (e.g., 3dB / oct) and decreasing slope (e.g., -6dB / oct) to calculate the area, and you get the area value of A1-2. The power spectral density height (g² / Hz) corresponding to the frequency range 1 to 2 (Hz) shows an upward or downward slope in the power spectral density height. The triangle area formula is used: multiply the width (frequency range 1 to 2) by the height (corresponding power spectral density height). Using the rising slope (e.g., 3dB / octet) and the falling slope (e.g., -6dB / octet) to calculate the area, we obtain the area value A²-2. This is repeated until the area value A10000-2 is reached. The total GRMs is calculated algebraically by summing the areas of the triangles from A1-2 to A10000-2. This sum is then added to the sum of the areas of the rectangles to obtain the total area A of the power spectral density (PSD). A represents the magnitude G of this random vibration signal. The GRMs value is then calculated by applying the total RMS value to the random vibration acceleration value G.

[0078] Use the flat spectrum calculation formula: Calculate the total RMS value of acceleration (reference Figure 6 and Figure 7): Formula for calculating thrust (F): F = (m0 + m1 + m2 + ...) A ... ... 2 ); The interchangeable calculation formula of the three vibration parameters of acceleration (A), velocity (V), and displacement (D): A=ωv……………………Formula (2); Where: A—experimental acceleration (m / s 2 ), V is the experimental speed (m / s), ω = 2πf (angular velocity), where f is the experimental frequency (Hz); V = ωD × 10 -3 …………………Formula (3); where: D—displacement (mm 0-p ) Single peak. A=ω 2 D×10 -3 ………………………Formula (4); Formula (4) can be simplified to: Where: A is in g; 1g = 9.8m / s 2 .therefore: The unit of A is m / s 2 ; Calculation formula for the smooth crossover frequency of the fixed vibration level sweep frequency test, calculation formula for the smooth crossover frequency of acceleration and velocity Where: f A-V —Frequency of the smooth crossover point between acceleration and velocity (Hz). The formula for calculating the frequency of the smooth crossover point between velocity and displacement is: Where: f V-D —Frequency of the smooth crossover point between acceleration and velocity (Hz). The calculation formula for the frequency of the smooth crossover point between acceleration and displacement is: Where: f A-D —Frequency of the smooth crossover point between acceleration and displacement (Hz). According to formula (7), it can be simplified to: The unit of A is m / s 2 The calculation formula for scanning time and scanning speed: Linear scanning is relatively simple: Where: S1—scanning time (s or min), f H -f L —Scanning broadband, where f H is the upper frequency limit, f L is the lower limit frequency (Hz), V1 is the scanning speed (Hz / min or Hz / s). Logarithmic sweep: the calculation formula of the octave is: Where: n—octave (oct), f H —Upper frequency (Hz), f L —Lower frequency limit (Hz). Scanning speed calculation formula: Where: R—scanning speed (oct / min), f H —Upper frequency (Hz), f L —Lower frequency limit (Hz), T—scanning time. The formula for calculating the scanning time is: T=n / R……………………Formula (11); where: T—scanning time (min or s), n—octave (oct), R—scanning speed (oct / min or oct / s). The calculation formula commonly used in random vibration experiments is: Frequency resolution calculation formula: Where: △f—frequency resolution (Hz), f max —Highest operating frequency, N—number of spectral lines (number of lines), f max Is an integral multiple of △f. Calculation of the total RMS value of random vibration acceleration (refer to Figure 6 ):(1) Using the ascending spectrum, descending spectrum and flat spectrum calculation formula: A2=W·△f=W×(f1-f b )………………Flat spectrum calculation formula; Rising spectrum calculation formula; The formula for calculating the spectrum is: m = N / 3, N is the slope of the spectrum (dB / octive), assuming N = 3, then when n = 1, the following formula for calculating the spectrum is adopted: A3 = 1f Total RMS acceleration: Let: w = w b =w1=0.2g 2 / Hz f a =10Hz, f b =20Hz, f1=1000Hz, f2=2000Hz; w a →w b The spectrum slope is 3dB, and the spectrum slope of w1→w2 is -6dB. Referring to the attached figure, we know that compared with the slope of 3dB and the slope of -6dB, the negative value of -6dB indicates that the slope of the graph is developing downward, and the positive value of 3dB indicates that the slope of the graph is developing upward. Using the rising spectrum formula, we can calculate: Using the flat spectrum formula, we can calculate: A2=w×(f1-f b )=w×(1000-20)=196; Using the spectrum reduction formula, we can get: The total root mean square value of acceleration is calculated using the formula: 2. Use the flat spectrum calculation formula: Calculate the total RMS value of acceleration (reference Figure 7 ): For the sake of simplicity, the power spectrum density curve is often divided into a hypothetical rectangle and triangle, and w is calculated using the rising slope (such as 3dB / oct) and the falling slope (such as -6dB / oct) respectively. aand w2, then find the area and area sum of each geometric shape, and then square root to find the total RMS value of acceleration (g) ...Formula (13-2); Note: The result of the second calculation method is often larger than the result calculated using the rise and fall spectrum. It can be used as a possible estimate, but it cannot be used for accurate calculation. Example: Let w = w b +w1=0.2g 2 / Hz,f a =10Hz, f b =20Hz, f1=1000Hz, f2=2000Hz; due to f a w a Raised to f b w b At this point, the slope is 3dB / oct, and w b =0.2g 2 / Hz; Therefore w a =0.1g 2 / Hz, and since w1 of f1 drops to w2 of f2, the slope is -6dB / oct, and w1=0.2g 2 / Hz; Therefore w2=0.05g 2 / Hz; Divide the power spectrum density curve into three rectangles (A1A2 A3) and two triangles (A4 A5), and then calculate the area of each geometric shape separately, then A1=w a ×(f b -f a )=×(20-10)=1; A2=w×(f1-f b )=×(1000-20)=196; A3=w2×(f2-f1)=×(2000-1000)=50;

[0079] Total RMS acceleration Given the total root mean square (grms) value of acceleration, the formula for calculating the acceleration power spectrum density is: Assume that the total root mean square value of acceleration is: Find the acceleration power spectrum density S F ; Request X p-p Formula for calculating the maximum peak-to-peak displacement (mm): The most accurate method is to find the displacement spectral density curve, calculate the RMS displacement value, and then multiply the RMS displacement by three to obtain the maximum peak displacement (if the displacement spectral density is a curve, integration is required for calculation). In engineering, it is often necessary to estimate a possible value. Simplified estimation formula: Where: X p-p —Maximum peak-to-peak displacement (mm p-p ), fo — is the lower limit frequency (Hz), w o — is the lower limit frequency (f o ) PSD value (g 2 / Hz), let: f o =10Hz, w o =0.14g 2 / Hz, then: Formula for calculating the acceleration power spectrum density slope (dB / oct): Where: (oct octave), w H —Frequency f H The acceleration power spectrum density value (g 2 / Hz), w L —Frequency f L The acceleration power spectrum density value (g 2 / Hz).

[0080] The converter is a printed circuit board, including PCB substrate fixing holes, component corner soldering holes, SLG GND grounding wires, connecting wires (reference Figure 4 ); The overall size of the converter is 13*9*1.5CM (length*width*height). The converter is connected to 24V DC to work, converting the vibration level information grms output by the piezoelectric vibration acceleration sensor into a control signal of 0~10V, which is output to the programmable controller of the device for reading; the four processing modules 3 are electrically connected to the four piezoelectric vibration acceleration sensors; the converter that directly converts the vibration level calculation value into a voltage signal has four vibration input channels and signal output channels (reference Figure 5 ).

[0081] In some embodiments, the converter has four vibration channels, i.e., four processing modules 3; the converter cooperates with the piezoelectric vibration acceleration sensor, and the vibration sensor does not need to be selected during use; the converter is suitable for controlling or monitoring the vibration information of the equipment, and the user no longer needs to select an amplifier to pre-process the vibration signal, nor does he need to select the vibration parameters; the vibration magnitude information grms is converted into a control signal and output to the programmable controller of the equipment and is read; the magnitude value of the displayed response can also be adjusted by the vibration correction parameters; the application of vibration data acquisition in equipment control and monitoring is suitable for modules with small size and simple functions, so as to facilitate the introduction of developed equipment.

[0082] A converter that directly converts the calculated vibration level value into a voltage signal. The input end of the converter is connected to a piezoelectric vibration acceleration sensor to read the vibration level signal grms; the output end is connected to the control signal point of the programmable controller; four vibration signal conversion channels are used to control or monitor the vibration information of the equipment; the converter directly converts the calculated vibration level signal grms into a 0-10V voltage signal; the converter uses a flat spectrum calculation formula; calculates the total root mean square value of acceleration grms; so that the equivalent circuit of the converter can be composed of fewer electronic components and ordinary electronic components; the converter is a 13*9*1.5CM (length*width*height) PCB printed circuit board, installed in the distribution box of the equipment.

[0083] The following describes the operating process using one of the converter's processing modules as an example: The piezoelectric vibration accelerometer is fixed to the object being measured. The BNC connector on the other end of the voltage-type vibration accelerometer is connected to the converter's J1 BNC connector. Furthermore, the converter's JP1-1-CH1 RMS pin is connected to the positive terminal of the programmable controller's signal interface via a wire. The converter's JP1-9-SIGGND pin is also connected to the negative terminal of the programmable controller's signal interface via a wire. The object being measured is then stimulated, such as by impact or mechanical vibration.

[0084] Furthermore, the unit of the magnitude of the output signal of the vibration acceleration sensor in response to vibration is grms; the converter performs measurement and analysis and outputs a signal; the magnitude amplitude of the output signal of the converter is proportional to the magnitude grms of the output signal of the vibration acceleration sensor.

[0085] Finally, the voltage-type vibration accelerometer outputs a physical magnitude (grms) to a converter. This voltage signal ranges from 0 to 200 grms, exhibiting a linearly increasing characteristic and a setting range of 0 to 10 V. This 0 to 10 V voltage signal is then fed to a programmable controller as vibration information for controlling or monitoring mechanical equipment.

[0086] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0087] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0088] While this patent document contains many specifics, they should not be construed as limitations on the scope of any invention or the claims, but rather as descriptions of features for particular embodiments of particular inventions. Certain features described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various functions described in the context of a single embodiment can also be implemented separately in multiple embodiments, or in any suitable subcombination. Furthermore, while the features described above may be described as functioning in certain combinations, or even initially claimed to be so, in some cases one or more features in a claim combination may be removed from the combination, and a claim combination may be directed to a subcombination or variations of a subcombination.

[0089] Likewise, while operations may be depicted in a particular order in the accompanying drawings, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, in order to achieve desired results. Furthermore, the separation of various system components in the embodiments of this patent document should not be understood as requiring such separation in all embodiments.

[0090] Only a few implementations and examples are described, and other implementations, enhancements, and variations can be made based on what is described and illustrated in this patent document.

[0091] Although several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the present disclosure. The present examples are to be considered illustrative rather than restrictive, and the present invention is not to be construed as being limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.

Claims

1. A method for converting vibration directly into a voltage signal by a converter, characterized in that: The steps include: Step 1: First, the vibration amount is detected, and the acceleration sensor transmits the detected vibration amount to the processing module (3), and the plurality of processing modules (3) connected in parallel are electrically connected to the first voltage source module (1) and the second voltage source module (2); Step 2: Processing the vibration amount, the frequency width filtering module (5), the vibration magnitude calculation module (6) and the vibration magnitude conversion voltage signal module (7) of the processing module (3) sequentially process the vibration amount to obtain a total root mean square value of acceleration grms, and the processing module (3) includes a current source module (4); Step 3: Convert the total root mean square value of acceleration grms into a control signal and output it to the programmable controller of the device; Calculation of the total RMS value of random vibration acceleration: ………Calculation formula for ascending (descending) spectrum; Where: A = area of the spectrum plot, fa = upper frequency limit (Hz), fb = lower frequency limit (Hz), w = width of the spectrum plot, m = mass (kg); f is the experimental frequency (Hz); d is the displacement (mm); Acceleration value; is the sum of the spectrum area, the total RMS value:

2. The method for converting vibration directly into a voltage signal according to claim 1, wherein: The plurality of processing modules (3) are respectively encapsulated so as to isolate signals between the plurality of processing modules (3); The first voltage source module (1) and the second voltage source module (2) are both direct current voltage sources.

3. The method for converting vibration directly into a voltage signal according to claim 2, characterized in that: The processing modules (3) specifically include four; The first voltage source module (1) and the second voltage source module (2) are located outside the packaged processing module (3).

4. The method for converting vibration directly into a voltage signal according to claim 1, wherein: The current source module (4), the frequency width filtering module (5), the vibration magnitude calculation module (6), and the vibration magnitude conversion voltage signal module (7) are electrically connected in sequence; One end of the current source module (4) is electrically connected to the first voltage source module (1), and the other end of the current source module (4) is electrically connected in sequence to the frequency width filtering module (5), the vibration magnitude calculation module (6), and the vibration magnitude conversion voltage signal module (7); The second voltage source module (2) is electrically connected to the vibration magnitude calculation module (6) and the vibration magnitude conversion voltage signal module (7) in sequence.

5. The method for converting vibration directly into a voltage signal according to claim 1, wherein: The processing module (3) further includes an input port electrically connected to the frequency width filtering module (5); The input port is connected in parallel with the current source module (4).

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