A calibration device

Abstract

The utility model provides a kind of calibration device, comprising: fixed subassembly, fixed subassembly is used to fix microseismic sensor;Inclination sensor, inclination sensor is connected with microseismic sensor, and inclination sensor is used to obtain the current inclination of microseismic sensor;Vibration driving component, vibration driving component is connected with fixed subassembly;Output device, output device is respectively connected with microseismic sensor, inclination sensor, vibration driving component signal, and output device obtains output value according to the current inclination of microseismic sensor and the output signal of microseismic sensor and preset compensation coefficient, and according to output value, correction compensation coefficient is carried out.The calibration device in the utility model solves the technical problem that the calculation of microseismic sensor vibration energy is not accurate in related technology.

Description

Technical Field

[0001] This utility model relates to the technical field of micro-vibration sensor calibration devices, specifically to a calibration device. Background Technology

[0002] Due to the unique structure of microseismic sensors, they receive vibration signals more effectively when the vibration direction is along the sensor's vertical direction (i.e., the sensor's central axis). In underground mines, microseismic sensors are typically installed on conductive anchor bolts. The construction process for conductive anchor bolts involves manual drilling and installation. The angle of the manually drilled holes determines the installation angle of the conductive anchor bolt. Since the angle of manual drilling often cannot guarantee vertical alignment, directly installing microseismic sensors on conductive anchor bolts cannot guarantee the required vertical installation. Furthermore, if several microseismic sensors used for vibration energy calculation have slight differences in installation, the energy calculation will be affected, causing errors in the vibration energy calculation. The magnitude of vibration energy is a crucial indicator of whether an area poses a shock hazard. Currently, to address the installation angle issue of microseismic sensors, universal joint devices are commonly used to adjust the installation angle, ensuring that the microseismic sensors are installed vertically.

[0003] However, this method has the following drawbacks: ① The sensor is less affected by low-frequency vibration signals, but has a great impact on high-frequency vibration signals. The current national standard GB / T 25217.4—2019 requires that the frequency response range of the micro-vibration sensor should cover 0.1 Hz to 600 Hz. Some micro-vibration sensors on the market even cover a higher frequency band, which will affect the calculation results of vibration energy; ② When installing the universal joint device, it is necessary to adjust the direction of the two rotational degrees of freedom. The installation quality requirements are high and the installation process is complicated, which will lead to the inability to accurately control the installation angle of the micro-vibration sensor.

[0004] Therefore, due to the installation angle of the micro-vibration sensor, the attenuation of high-frequency signals caused by the use of universal joints, and the complexity of operation, the calculation of vibration energy of the micro-vibration sensor in actual use is not accurate enough and has a large error range.

[0005] Therefore, existing technologies need further development. Utility Model Content

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a calibration device to solve the technical problem that the calculation of vibration energy of micro-vibration sensors is not accurate enough in related technologies.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solution: a calibration device is provided, comprising: a fixing component for fixing a micro-vibration sensor; an inclination sensor connected to the micro-vibration sensor for obtaining the current inclination angle of the micro-vibration sensor; a vibration driving component connected to the fixing component; and an output device connected to the micro-vibration sensor, the inclination sensor, and the vibration driving component, wherein the output device obtains an output value based on the current inclination angle of the micro-vibration sensor, the output signal of the micro-vibration sensor, and a preset compensation coefficient, and corrects the compensation coefficient based on the output value.

[0008] Furthermore, the calibration device includes a data comparison module, which is used to compare the output value with the standard output value, and the output device corrects the compensation coefficient based on the comparison result.

[0009] Furthermore, the fixing component includes: a clamping cylinder extending along the axial direction of the micro-vibration sensor, the clamping cylinder being hollow and housing the micro-vibration sensor; and a clamping bolt threadedly connected to a mounting hole on the clamping cylinder, the end of the clamping bolt abutting against the micro-vibration sensor.

[0010] Furthermore, the clamping bolts include multiple clamping bolts, which are distributed at intervals around the circumference of the clamping cylinder, and multiple mounting holes are correspondingly provided, with each mounting hole connected to a corresponding clamping bolt.

[0011] Furthermore, the clamping cylinder includes: a first receiving cavity and a second receiving cavity that are interconnected. The first receiving cavity contains the sensor body of the micro-vibration sensor, and the second receiving cavity contains the cable connector of the micro-vibration sensor. A supporting step is provided between the first receiving cavity and the second receiving cavity, and the sensor body is supported on the supporting step.

[0012] Furthermore, the calibration device includes a support rod that extends axially along the clamping cylinder, with one end of the support rod connected to the vibration drive component and the other end of the support rod connected to the clamping cylinder.

[0013] Furthermore, the support rods comprise multiple rods, which are distributed circumferentially around the clamping cylinder.

[0014] Furthermore, a base is connected to the bottom of the clamping cylinder, and the base is connected to one end of the support rod near the clamping cylinder. A connecting port is provided on the base, which communicates with the inside of the clamping cylinder and is used for the passage of the cable of the micro-vibration sensor.

[0015] Furthermore, an inclination sensor is fixedly installed on the base, and the inclination sensor is located on the side of the base away from the micro-vibration sensor.

[0016] Furthermore, the output device includes a display screen for displaying the output value.

[0017] Beneficial effects:

[0018] 1. In the calibration device of this embodiment, a standard program containing the above-mentioned compensation coefficients and compensation algorithms is built into the output device. There is a corresponding compensation coefficient for each different angle. The tilt sensor transmits the current tilt angle of the micro-vibration sensor to the output device. The standard program then feeds back the compensation coefficient at the current tilt angle to the output device to adjust the output value of the micro-vibration sensor, enabling it to be converted into the output value of the micro-vibration sensor at a 0° angle. By driving the micro-vibration sensor to vibrate through the vibration drive component, the output device can obtain the output value of the micro-vibration sensor after compensation by the compensation coefficient, i.e., the output value of the micro-vibration sensor at a 0° angle under the current vibration intensity. The compensation coefficient is adjusted and corrected based on the output value to reduce the error of the compensation coefficient, thereby achieving calibration and standardization of the compensation coefficient. This makes the calculation of vibration energy more accurate and solves the technical problem of inaccurate calculation of vibration energy of micro-vibration sensors in related technologies.

[0019] 2. The calibration device includes a data comparison module, which compares the output value with the standard output value. The output device adjusts the compensation coefficient based on the comparison result. The standard output value of the micro-vibration sensor can be obtained from the vibration signal of the vibration drive component. The output value of the micro-vibration sensor is compared with the standard output value. If the two are not within a reasonable error range, the compensation coefficient needs to be adjusted and corrected to reduce the error. If the two are within a reasonable error range, no adjustment is required. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the calibration device used in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the fixing component of the calibration device used in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the fixing component of the calibration device used in this embodiment of the utility model.

[0023] The above figures include the following reference numerals:

[0024] 10. Micro-vibration sensor;

[0025] 1. Fixing assembly; 11. Clamping cylinder; 111. First receiving cavity; 112. Second receiving cavity; 113. Supporting step; 12. Clamping bolt; 13. Base; 14. Connecting port; 15. Support rod; 2. Tilt sensor; 3. Vibration driving component; 4. Output device; 41. Display screen. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] According to an embodiment of this utility model, a calibration device is provided. Please refer to [link / reference]. Figures 1 to 3 The system includes: a fixing component 1 for fixing the micro-vibration sensor 10; an inclination sensor 2 connected to the micro-vibration sensor 10 for obtaining the current inclination angle of the micro-vibration sensor 10; a vibration drive component 3 connected to the fixing component 1; and an output device 4 connected to the micro-vibration sensor 10, the inclination sensor 2, and the vibration drive component 3 for obtaining an output value based on the current inclination angle of the micro-vibration sensor 10, the output signal of the micro-vibration sensor 10, and a preset compensation coefficient, and correcting the compensation coefficient based on the output value.

[0028] Preferably, the vibration drive component 3 is a vibration motor.

[0029] Specifically, the fixing component 1 is used to fix the microseismic sensor 10 and provide rigid support for the microseismic sensor 10. The tilt sensor 2 is connected to the microseismic sensor 10 and is used to obtain the current tilt angle of the microseismic sensor 10 in real time. The vibration driving component 3 is connected to the fixing component 1 and serves as the input reference for calibration. The vibration driving component 3 can generate vibration signals with known frequency and amplitude to simulate geological movement and provide vibration signals to the microseismic sensor 10. The output device 4 can obtain a known standard output value based on the vibration signal of the vibration driving component 3.

[0030] It should be noted that before calibration, preliminary testing is conducted using testing equipment. In the laboratory, the microseismic sensor is placed vertically, and an eccentric vibration motor is used to emit a vibration signal to it. The sensor's output, such as velocity and current, is observed. This process is repeated multiple times to obtain the relationship between the vertical angle and the sensor's output signal when the sensor is vertically positioned. Similarly, the same experiment is performed with the same angles (1°, 2°...90°) between the microseismic sensor and the vertical direction to find the relationship between these angles and the sensor's output signal. Based on these experiments, the response output signals of the microseismic sensor under different angles and the same type of vibration are obtained. By converting these response output signals under different angles and the same type of vibration using an algorithm, the compensation coefficients for different angles can be obtained. Using the output of the microseismic sensor at 0° angle as the standard output, the output values ​​at other angles can be converted into the output value of the microseismic sensor at 0° angle by compensating with compensation coefficients. The output value of the microseismic sensor obtained by using compensation coefficients and compensation methods is not affected by the installation angle of the microseismic sensor, the attenuation of high-frequency signals caused by the use of universal joints, or the complexity of operation.

[0031] In the calibration device of this embodiment, the output device 4 has a built-in standard program containing the above-mentioned compensation coefficients and compensation algorithms. There is a corresponding compensation coefficient for each different angle. The tilt sensor 2 transmits the current tilt angle of the micro-vibration sensor 10 to the output device 4. The standard program then feeds back the compensation coefficient at the current tilt angle to the output device 4 to adjust the output value of the micro-vibration sensor, so that it can be converted into the output value of the micro-vibration sensor at a 0° angle. By driving the micro-vibration sensor 10 to vibrate through the vibration drive component 3, the output device 4 can obtain the output value of the micro-vibration sensor after compensation by the compensation coefficient, that is, the output value of the micro-vibration sensor at a 0° angle under the current vibration intensity. The compensation coefficient is adjusted and corrected according to the output value to reduce the error of the compensation coefficient, thereby achieving calibration and standardization of the compensation coefficient. This makes the calculation of vibration energy more accurate and solves the technical problem of inaccurate calculation of vibration energy of micro-vibration sensors in related technologies.

[0032] In the calibration device of this embodiment, see Figure 1 The calibration device includes a data comparison module, which compares the output value with the standard output value. The output device 4 adjusts the compensation coefficient based on the comparison result. The standard output value of the micro-vibration sensor can be obtained from the vibration signal of the vibration drive component 3. The output value of the micro-vibration sensor is compared with the standard output value. If the two are not within a reasonable error range, the compensation coefficient needs to be adjusted and corrected to reduce the error. If the two are within a reasonable error range, no adjustment is required.

[0033] In the calibration device of this embodiment, see Figure 1 The fixing component 1 includes: a clamping cylinder 11, which extends axially along the micro-vibration sensor 10 and is hollow, housing the micro-vibration sensor 10; and a clamping bolt 12, which is threadedly connected to a mounting hole on the clamping cylinder 11, with its end abutting against the micro-vibration sensor 10. This configuration allows the micro-vibration sensor 10 to be clamped within the clamping cylinder, maintaining its relatively fixed position. The bolt fixing method is simple in structure and facilitates installation and disassembly.

[0034] In some embodiments, the clamping cylinder 11 has a cylindrical structure, and the interior of the clamping cylinder 11 has a cylindrical inner cavity, which can be adapted to the external structure of the micro-vibration sensor 10.

[0035] In the calibration device of this embodiment, see Figure 1 The clamping bolts 12 include multiple bolts, which are distributed circumferentially around the clamping cylinder 11. Correspondingly, multiple mounting holes are provided, and each mounting hole is connected to one of the clamping bolts 12. Specifically, the multiple clamping bolts 12 provide multi-point fixation, increasing the connection stability of the micro-vibration sensor 10.

[0036] In the calibration device of this embodiment, see Figure 3 The clamping cylinder 11 includes a first receiving cavity 111 and a second receiving cavity 112 that are interconnected. The first receiving cavity 111 houses the sensor body of the micro-vibration sensor 10, and the second receiving cavity 112 houses the cable connector of the micro-vibration sensor 10. A supporting step 113 is provided between the first receiving cavity 111 and the second receiving cavity 112, and the sensor body is supported on the supporting step 113. By providing the supporting step 113, the micro-vibration sensor 10 can be further supported and fixed, keeping its position relatively fixed.

[0037] In the calibration device of this embodiment, see Figure 1 The calibration device includes a support rod 15, which extends axially along the clamping cylinder 11. One end of the support rod 15 is connected to the vibration drive component 3, and the other end is connected to the clamping cylinder 11. By setting the support rod 15, the vibration drive component 3 and the clamping cylinder 11 can maintain a certain distance, avoiding mutual contact and affecting the transmission of vibration signals.

[0038] In the calibration device of this embodiment, see Figure 1 The support rods 15 include multiple rods, which are distributed circumferentially around the clamping cylinder 11. By setting multiple support rods 15, a high-rigidity connection between the clamping cylinder 11 and the vibration drive component 3 is achieved, significantly improving the structural stability of the calibration device.

[0039] In the calibration device of this embodiment, see Figure 3 The bottom of the clamping cylinder 11 is connected to a base 13. The base 13 is connected to one end of the support rod 15 near the clamping cylinder 11. The base 13 has a connecting port 14 that communicates with the inside of the clamping cylinder 11 and is used for the cable of the micro-vibration sensor 10 to pass through. By setting the base 13, it is easy to install multiple support rods 15 and connect the support rods 15 to the clamping cylinder 11.

[0040] Specifically, multiple support rods 15 are respectively connected to the base 13 by bolts. For example, external threads can be provided at the end of the support rod 15, and then the end sensor is located in the mounting hole on the base 13, and then a nut is used to connect it to the end of the support rod 15. At the same time, there is an outer diameter difference between the end of the support rod 15 and the main part of the support rod, thereby forming a support step. The base 13 abuts against the support step, so that the support rod 15 and the base 13 maintain a relatively fixed position.

[0041] In some embodiments, the vibration drive component 3 is a flange-type vibration motor, and the support rod 15 can be directly connected to the flange on the flange-type vibration motor.

[0042] In the calibration device of this embodiment, see Figure 1 An angle sensor 2 is fixedly mounted on the base 13, and the angle sensor 2 is located on the side of the base 13 away from the micro-vibration sensor 10. The angle sensor can measure the angle between the micro-vibration sensor and the vertical direction, and thus obtain the compensation coefficient at the corresponding angle.

[0043] In the calibration device of this embodiment, see Figure 1 The output device 4 includes a display screen 41, which is used to display the output value.

[0044] Understandably, the output device 4 has a built-in battery that can power components such as the vibration drive component 3 and the micro-vibration sensor.

[0045] The following describes an optional embodiment of this application with reference to Embodiment 1:

[0046] Example 1

[0047] A vibration signal was emitted to the microseismic sensor using an eccentric vibration motor in the laboratory. The sensor's output, including velocity and current, was observed. This experiment was repeated multiple times to determine the relationship between the vertical angle and the sensor's output signal when the sensor was placed vertically. Similarly, the same experiment was conducted with the eccentric vibration motor to adjust the angle between the sensor and the vertical direction to 1°, 2°...90°, to find the relationship between these angles and the sensor's output signal. This yielded the response output signal of the microseismic sensor under the same vibration at different angles to the vertical. By using the least squares method for correlation simulation, the output signal of the microseismic sensor with the same vibration signal at all angles could be obtained. Finally, using the output of the microseismic sensor at 0° angle as the standard output, the outputs at other angles were converted to the output value of the microseismic sensor at 0° angle through a compensation algorithm.

[0048] The calibration device can measure the angle between the micro-vibration sensor and the vertical direction through the tilt sensor 2. After obtaining the angle, it sets a compensation coefficient for the output terminal of the micro-vibration sensor based on the relationship between the pre-obtained angle and the standard output signal, adjusts the sensor output value, and sends a vibration signal to the micro-vibration sensor 10 through the vibration drive component 3. The display screen 41 of the output device can then obtain the output value of the micro-vibration sensor, ensuring that the output value is within a reasonable error range from the standard output value.

[0049] To address the issues of inaccurate vibration energy caused by the installation angle of microseismic sensors, and the problems of high-frequency signal attenuation and operational complexity caused by universal joint devices, this application proposes a calibration device for microseismic sensor signals. First, the installation angle of the microseismic sensor relative to the vertical direction is measured using an inclination sensor 2 to obtain the corresponding compensation coefficient, which is then input to the output terminal of the microseismic sensor to change its output value. Next, a vibration signal is supplied to the microseismic sensor 10 via a vibration drive component 3 to perform an output test on the microseismic sensor 10, verifying whether the actual output signal and the standard signal are within a reasonable error range. If the error range is large, the compensation coefficient is corrected and fine-tuned.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0052] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0053] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0054] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A calibration device, characterized in that, include: Fixing component (1), the fixing component (1) is used to fix the micro-vibration sensor (10); Inclination sensor (2), the inclination sensor (2) is connected to the micro-vibration sensor (10), the inclination sensor (2) is used to obtain the current inclination angle of the micro-vibration sensor (10); Vibration drive component (3), the vibration drive component (3) is connected to the fixing component (1); Output device (4) is connected to the micro-vibration sensor (10), tilt sensor (2) and vibration drive component (3) respectively. The output device (4) obtains the output value according to the current tilt angle of the micro-vibration sensor (10), the output signal of the micro-vibration sensor (10) and the preset compensation coefficient, and corrects the compensation coefficient according to the output value.

2. The calibration device according to claim 1, characterized in that, The calibration device includes a data comparison module, which is used to compare the output value with the standard output value. The output device (4) corrects the compensation coefficient based on the comparison result.

3. The calibration device according to claim 1, characterized in that, The fixing component (1) includes: A clamping cylinder (11) extends along the axial direction of the micro-vibration sensor (10), the clamping cylinder (11) is hollow, and the micro-vibration sensor (10) is housed in the clamping cylinder (11). A clamping bolt (12) is threadedly connected to a mounting hole on the clamping cylinder (11), and the end of the clamping bolt (12) abuts against the micro-vibration sensor (10).

4. The calibration device according to claim 3, characterized in that, The clamping bolts (12) include a plurality of bolts, which are distributed circumferentially around the clamping cylinder (11). The mounting holes are provided accordingly, and the mounting holes are connected one-to-one with the clamping bolts (12).

5. The calibration device according to claim 3, characterized in that, The clamping cylinder (11) includes: A first receiving cavity (111) and a second receiving cavity (112) are interconnected. The first receiving cavity (111) contains the sensor body of the micro-vibration sensor (10), and the second receiving cavity (112) contains the cable connector of the micro-vibration sensor (10). A support step (113) is provided between the first receiving cavity (111) and the second receiving cavity (112), and the sensor body is supported on the support step (113).

6. The calibration device according to claim 3, characterized in that, The calibration device includes: Support rod (15) extends along the axial direction of the clamping cylinder (11), one end of the support rod (15) is connected to the vibration drive component (3), and the other end of the support rod (15) is connected to the clamping cylinder (11).

7. The calibration device according to claim 6, characterized in that, The support rods (15) include a plurality of rods, which are distributed circumferentially around the clamping cylinder (11).

8. The calibration device according to claim 6, characterized in that, The bottom of the clamping cylinder (11) is connected to a base (13). The base (13) is connected to one end of the support rod (15) near the clamping cylinder (11). A communication port (14) is provided on the base (13). The communication port (14) is connected to the inside of the clamping cylinder (11). The communication port (14) is used for the cable of the micro-vibration sensor (10) to pass through.

9. The calibration device according to claim 8, characterized in that, The tilt sensor (2) is fixedly installed on the base (13), and the tilt sensor (2) is located on the side of the base (13) away from the micro-vibration sensor (10).

10. The calibration device according to claim 1, characterized in that, The output device (4) includes a display screen (41) for displaying output values.

Images