Calibrating device for handheld working vibration meter

Abstract

The invention discloses a handheld working vibration meter calibration device, and the device comprises two clamping plates which are arranged at an interval and are connected through a connecting bolt, and a vibration meter is clamped between the two clamping plates; the elastic band is transversely arranged between the two clamping plates, the two ends of the elastic band are fixed to the two fixing blocks respectively, and the elastic band is connected to the top end of the vibration meter in a pressed mode; the standard vibration table is located below the vibration meter, and a probe of the vibration meter abuts against the working face of the standard vibration table. The device can ensure that the vibration meter does not incline forwards and backwards through the clamping plate, can ensure that the vibration meter does not incline leftwards and rightwards through the elastic band pressed on the vibration meter, and is simple in structure and convenient to clamp. Meanwhile, the elastic band has a counter-acting force which can simulate feedback of a human hand and give a counter-acting force to the vibration meter during testing, so that the working condition of the handheld working vibration meter is simulated, and testing of the handheld working vibration meter is realized.

Description

Technical Field

[0001] The invention relates to the technical field of vibration meter calibration devices, and more particularly to a handheld working vibration meter calibration device. Background Art

[0002] A handheld vibration meter is a portable vibration measuring instrument, mainly used to calibrate the vibration signal of the equipment. A handheld vibration meter can usually output three parameters: acceleration, velocity and displacement. It is widely used in fault diagnosis and preventive maintenance. It can diagnose the equipment status through vibration spectrum analysis and has a wide range of applications in industries such as electricity.

[0003] According to relevant regulations, in order to ensure the measurement accuracy of the vibration meter, the vibration meter needs to be calibrated regularly. There are two main existing calibration methods. One is that the inspector holds the handheld vibration meter and places it on the standard vibration table. By controlling the output of the standard vibration table, the vibration table generates the corresponding frequency and amplitude. By comparing the indication of the handheld vibration meter and the output value of the standard vibration table, the purpose of calibrating the handheld working vibration meter is achieved. However, during the calibration, since the handheld working vibration meter and the vibration table only intersect at one point, this point will inevitably shift during the test process, resulting in data deviation. Therefore, in the actual calibration process, the inspector will press hard to avoid relative displacement. This pressing is relatively subjective, and the strength of each person is different, and the pressure during pressing will also be different, which will affect the measurement data of the vibration meter and cause the calibration data to be unstable. The second is to remove the probe part of the handheld vibration meter and fix it on the standard vibration table with screws. Although this method can obtain accurate signals, it is very different from the actual use situation, which has a great impact on the correct use of the instrument.

[0004] Therefore, how to provide a handheld working vibration meter calibration device that is easy to clamp, has accurate data testing, and can simulate the situation when a person holds the vibration meter in his hand and works is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a handheld working vibration meter calibration device, which has the advantages of convenient clamping of the vibration meter, accurate data testing, and can simulate the situation when a person holds the vibration meter in his hand and works.

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

[0007] A handheld working vibration meter calibration device, comprising:

[0008] Clamping plates, the clamping plates are two plates arranged at intervals and connected by connecting bolts, and the vibration meter is clamped between the two clamping plates;

[0009] An elastic band, the elastic band is horizontally placed between the two clamping plates, and the two ends of the elastic band are respectively fixed on two fixing blocks, and the elastic band is pressed on the top of the vibration meter;

[0010] A standard vibration table is located below the vibration meter, and a probe of the vibration meter abuts against a working surface of the standard vibration table.

[0011] It can be known from the above technical scheme that compared with the prior art, the present invention discloses a handheld working vibration meter calibration device. When in use, the handheld vibration meter is placed between two clamping plates, and the nuts of the connecting bolts are adjusted so that the gap between the two clamping plates can just place the handheld working vibration meter to be tested. Then, the probe of the handheld working vibration meter is abutted against the working surface of the standard vibration table, and then the elastic band is pressed on the handheld working vibration meter, and the two ends of the elastic band are fixed on two fixed blocks. During the test, the standard vibration table sends a single-frequency signal of a specific frequency and amplitude as required, and the handheld working vibration meter vibrates along with the standard vibration table. By comparing the indication of the handheld vibration meter with the output value of the standard vibration table, the purpose of calibrating the handheld working vibration meter is achieved.

[0012] This device can ensure that the handheld working vibration meter will not tilt at an angle in the front and back directions through the clamping plate, and can ensure that the handheld working vibration meter will not tilt left and right through the elastic band pressed on the handheld working vibration meter, and the device has a simple structure and is easy to clamp. At the same time, the elastic band has a reaction force, which can simulate the feedback of the human hand and give the handheld working vibration meter a reaction force during the test to simulate the working situation of the handheld working vibration meter and realize the test of the handheld working vibration meter. Therefore, the device meets the use requirements and makes the data of the instrument calibration more accurate and reliable.

[0013] Furthermore, the elastic band is overlapped on the connecting bolts located on both sides of the vibration meter.

[0014] The beneficial effect of adopting the above technical solution is that the connecting bolts can provide auxiliary support for the elastic band, so that the part of the elastic band crimped to the vibration meter is a straight band, which can better stabilize the crimped vibration meter and avoid the vibration meter being easily crushed when the tilted elastic band is crimped to the vibration meter.

[0015] Furthermore, the connecting bolts are multiple and arranged vertically.

[0016] The beneficial effect of adopting the above technical solution is that the position of the elastic band can be adjusted according to the height of the vibration meter, so that the device can be applied to the calibration of vibration meters at different heights, thereby improving the practicability of the device.

[0017] Furthermore, the elastic band is fixed to the fixing block by binding or screws.

[0018] Furthermore, the two clamping plates are both transparent acrylic plates.

[0019] The beneficial effect of adopting the above technical solution is that it is convenient for calibration personnel to observe in real time whether the vibration meter has been clamped in place by the two clamping plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a handheld working vibrometer calibration device provided by the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the main structure.

[0023] Figure 3 for Figure 2 Schematic cross-sectional view of the middle section AA.

[0024] Figure 4 for Figure 1 Schematic diagram of the top view structure.

[0025] Figure 5 for Figure 1 Schematic diagram of the side structure.

[0026] Figure 6 for Figure 1 Schematic diagram after hiding the front splint. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0028] like Figure 1-Figure 6 As shown, the embodiment of the present invention discloses a handheld working vibration meter calibration device, comprising:

[0029] Clamping plates 1, which are two clamping plates 1 arranged at intervals and connected by connecting bolts 2, and the vibration meter 100 is clamped between the two clamping plates 1;

[0030] An elastic band 3, the elastic band 3 is horizontally placed between the two clamping plates 1, and the two ends of the elastic band 3 are respectively fixed on two fixing blocks 4, and the elastic band 3 is crimped on the top of the vibration meter 100;

[0031] The standard vibration table 5 is located below the vibration meter 100 , and the probe of the vibration meter 100 abuts against the working surface of the standard vibration table 5 .

[0032] The elastic band 3 is overlapped on the connecting bolts 2 located on both sides of the vibration meter 100, so that the elastic band 3 is kept horizontal by the two connecting bolts 2 and pressed on the handheld working vibration meter to be tested, simulating the feedback of the hand during vibration to simulate the state of the human hand during use.

[0033] There are multiple connecting bolts 2 arranged vertically.

[0034] The elastic band 3 is fixed to the fixing block 4 by binding or screws.

[0035] The two clamping plates 1 are both transparent acrylic plates.

[0036] The basic principle of the present invention is that the existing handheld working vibration meter calibration device has problems such as changes in the inclination calibration value during calibration, and the use of screws for fixing is inconsistent with the actual use, resulting in the calibration result being of little significance for use. The present invention uses the verticality of the clamping plate in conjunction with the bolt to ensure the verticality of the handheld working vibration meter, and uses an elastic band to simulate the feedback mechanism of the human hand to make the vibration meter calibration more suitable for actual use. The elastic band can be tightened by bolts and fixing blocks to simulate the pressing in use to achieve the purpose of accurate calibration of the handheld working vibration meter.

[0037] The beneficial effects of the present invention are as follows: the handheld working vibration meter calibration device of the present invention is helpful for the traceability and transmission of the value of the handheld working vibration meter, and solves the problem of excessive data deviation in the calibration of the handheld working vibration meter; and the spacing of the splint and the position of the elastic band can be adjusted to calibrate handheld working vibration meters of different sizes; at the same time, the structure is simple, which reduces the installation difficulty of the handheld working vibration meter; at the same time, the metrological calibration of the handheld working vibration meter is closer to the actual use situation. It is helpful for the detection of handheld working vibration meters in the power industry, boilers and other large equipment, and problems can be discovered and solved earlier, which has great social and economic benefits.

[0038] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A handheld working vibration meter calibration device, characterized in that: include: Clamping plates (1), the clamping plates (1) being two arranged at intervals and connected by connecting bolts (2), and the vibration meter (100) being clamped between the two clamping plates (1); An elastic band (3), the elastic band (3) being horizontally placed between the two clamping plates (1), and the two ends of the elastic band (3) being respectively fixed on two fixing blocks (4), and the elastic band (3) being crimped onto the top end of the vibration meter (100); A standard vibration table (5), wherein the standard vibration table (5) is located below the vibration meter (100), and a probe of the vibration meter (100) abuts against a working surface of the standard vibration table (5).

2. A handheld work vibration meter calibration device according to claim 1, characterized in that: The elastic band (3) is overlapped on the connecting bolts (2) located on both sides of the vibration meter (100).

3. A handheld work vibration meter calibration device according to claim 1 or 2, characterized in that: The connecting bolts (2) are multiple and arranged vertically.

4. A handheld work vibration meter calibration device according to claim 1 or 2, characterized in that: The elastic band (3) and the fixing block (4) are fixed by binding or screws.

5. A handheld work vibration meter calibration device according to claim 1 or 2, characterized in that: The two clamping plates (1) are both transparent acrylic plates.

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