Acceleration sensitivity measuring device and method for oscillator

Abstract

The invention relates to the technical field of oscillators, and discloses an acceleration sensitivity measuring device and method for an oscillator, and the device comprises an impact experiment table, an installation assembly for installing the oscillator to be detected, an acceleration detection part, and a frequency detection part. According to the invention, the impact experiment table used for providing impact force is arranged to provide acceleration impact for the to-be-tested oscillator, and compared with a known 2g-tipover method, greater acceleration impact can be applied to the to-be-tested oscillator when the acceleration sensitivity is measured. The acceleration response and the frequency change of the oscillator to be detected can be detected in real time in cooperation with the acceleration detection component and the frequency detection component, and the signal-to-noise ratio in the measurement process is remarkably improved. Compared with a vibration phase noise backstepping method, the magnitude and the direction of the acceleration sensitivity of the oscillator to be measured in each axial direction can be accurately judged through synchronous acquisition and analysis of the frequency change and the acceleration signal, and the comprehensiveness of acceleration sensitivity measurement is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oscillators, and in particular to an acceleration sensitivity measurement device and a measurement method for an oscillator. Background Art

[0002] The contents in this section merely provide background information related to the present invention and may not constitute prior art.

[0003] As a key core component in electronic systems, the frequency stability of oscillators plays a vital role in the overall performance and reliability of electronic systems.

[0004] Generally speaking, the frequency stability of an oscillator is affected by many factors, such as electrical noise, temperature, and vibration, etc. In particular, in strong vibration environments such as those on vehicles, aircraft, and missiles, the vibration has a significant frequency modulation effect on the oscillator through its acceleration sensitivity, which in turn causes the frequency stability of the oscillator to drop significantly. Therefore, in a vibration environment, the frequency stability of the oscillator is mainly determined by its acceleration sensitivity.

[0005] At present, there are three main methods to reduce the frequency modulation effect of vibration on oscillators: dual resonator pairing compensation method, screening method and vibration isolation method. These methods all rely on the accurate measurement of the magnitude and direction of the oscillator's acceleration sensitivity. Especially for the dual resonator pairing compensation method, which has the best vibration resistance, smallest size and strongest reliability, the accuracy of acceleration sensitivity measurement directly affects the quality of the compensation effect. Therefore, how to accurately and efficiently measure the magnitude and direction of the oscillator's acceleration sensitivity has become a research focus in related fields.

[0006] In the related art, there are two main methods for measuring the acceleration sensitivity of an oscillator: a 2g-tipover method and a vibration phase noise back-calculation method.

[0007] Among them, the 2g-tipover method is to flip the oscillator vertically, use the change in the direction of gravity acceleration to make the oscillator produce a 2g acceleration difference on its own vertical axis, and calculate the acceleration sensitivity of the oscillator on the vertical axis through the frequency change caused by the acceleration difference on the vertical axis. Although this method is simple and direct, since the acceleration change is fixed at 2g, it is impossible to apply a high-level acceleration change, so the signal-to-noise ratio is low, and it is only suitable for oscillators with high stability and low noise. In addition, this method has low measurement accuracy and is difficult to meet the needs of high-precision applications.

[0008] The vibration phase noise inversion method applies controlled vibration to the oscillator and measures its phase noise under vibration, and then uses the dynamic phase noise formula to infer the acceleration sensitivity of the oscillator in the vibration axis. Although this method has a significant improvement in signal-to-noise ratio compared to the 2g-tipover method, the modulation of the oscillator frequency by vibration has a symmetrical characteristic, and the direction of the acceleration sensitivity cannot be determined, which greatly reduces the yield of the dual resonator pairing compensation method. In addition, the measurement efficiency of phase noise is low and the transmission line is prone to forming standing waves under vibration conditions, which reduces the accuracy of the measurement results. Summary of the invention

[0009] In view of this, the first object of the present invention is to provide an acceleration sensitivity measuring device for an oscillator, so as to more accurately and conveniently measure the magnitude and direction of the acceleration sensitivity of the oscillator in different axial directions. The second object of the present invention is to provide a method for measuring the acceleration sensitivity of an oscillator using the acceleration sensitivity measuring device.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] In one aspect, the present invention discloses an acceleration sensitivity measuring device for an oscillator, comprising:

[0012] An impact test bench configured to provide an impact force along a first direction;

[0013] a mounting assembly on which an oscillator to be tested is mounted; the mounting assembly is configured to receive the impact force provided by the impact test bench and transmit the impact force to the oscillator to be tested, so that the oscillator to be tested generates acceleration in the first direction; and the mounting assembly is further configured to selectively allow any one of the x-axis, y-axis and z-axis of the oscillator to be tested to be parallel to the first direction;

[0014] an acceleration detection component, configured to detect the acceleration of the oscillator to be tested in the first direction;

[0015] The frequency detection component is configured to detect the frequency of the oscillator to be tested.

[0016] Furthermore, the sampling time of the frequency detection component when detecting the frequency of the oscillator to be tested is shorter than the impulse pulse time.

[0017] Furthermore, the measuring device also includes a host computer, and the acceleration detection component and the frequency detection component are both communicatively connected to the host computer.

[0018] Furthermore, the measuring device also includes a control device, and the acceleration detection component and the impact test bench are both communicatively connected to the control device.

[0019] Furthermore, the installation component includes:

[0020] A base, rigidly connected to the impact test bench;

[0021] a first mechanical rotating shaft, disposed on the base; the axis of the first mechanical rotating shaft is perpendicular to the first direction, and the first mechanical rotating shaft is configured to be able to rotate around its own axis;

[0022] a second mechanical rotating shaft connected to the first mechanical rotating shaft; the axis of the second mechanical rotating shaft is perpendicular to the axis of the first mechanical rotating shaft; the second mechanical rotating shaft is configured to be able to rotate around its own axis;

[0023] Wherein, the oscillator to be tested is installed on the second mechanical rotating shaft.

[0024] Further, the first end of the second mechanical rotating shaft is connected to the first mechanical rotating shaft, the oscillator to be measured is installed at the second end of the second mechanical rotating shaft, and the acceleration detection component is installed on a side of the oscillator to be measured away from the second mechanical rotating shaft.

[0025] Further, the mounting assembly further comprises a first locking mechanism and a second locking mechanism;

[0026] The first locking mechanism is configured to lock or unlock a position of the first mechanical rotating axis, and the second locking mechanism is configured to lock or unlock a position of the second mechanical rotating axis.

[0027] On the other hand, the present invention discloses a method for measuring acceleration sensitivity, using the acceleration sensitivity measuring device for an oscillator as described above;

[0028] The measuring method comprises the following steps:

[0029] The oscillator to be tested is mounted on the mounting assembly, the oscillator to be tested is electrically connected to the frequency detection component via a radio frequency cable, and the acceleration detection component is mounted adjacent to the oscillator to be tested; thereafter, the acceleration sensitivity measurement phase can be entered;

[0030] In the acceleration sensitivity measurement stage, the mounting assembly is first used to make one of the x-axis, y-axis and z-axis of the oscillator under test parallel to the first direction; on this basis, the impact test bench provides an impact force along the first direction, so that the oscillator under test generates acceleration in the first direction; at this time, the acceleration of the oscillator under test in the first direction is detected by the acceleration detection component, and the frequency of the oscillator under test is detected by the frequency detection component, so as to calculate the magnitude and direction of the acceleration sensitivity of the oscillator under test in the corresponding axial direction according to the acceleration and the frequency;

[0031] By analogy, by using the installation component to make the remaining two axes of the oscillator under test parallel to the first direction respectively, the magnitude and direction of the acceleration sensitivity of the oscillator under test in the three axes can be measured.

[0032] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0033] 1. The measuring device disclosed in the present invention provides acceleration shock to the oscillator to be measured by setting an impact test bench for providing impact force. Compared with the known 2g-tipover method, it can apply a larger acceleration shock to the oscillator to be measured when measuring the acceleration sensitivity, and can cooperate with the acceleration detection component and the frequency detection component to detect the acceleration response and frequency change of the oscillator to be measured in real time, which significantly improves the signal-to-noise ratio in the measurement process, and also has higher accuracy when measuring the acceleration sensitivity of an oscillator with low acceleration sensitivity and high noise.

[0034] 2. Compared with the vibration phase noise back-calculation method which cannot determine the direction of acceleration sensitivity, the measuring device disclosed in the present invention can accurately determine the magnitude and direction of the acceleration sensitivity of the oscillator to be measured in each axial direction through the synchronous acquisition and analysis of frequency changes and acceleration signals, thereby improving the comprehensiveness of acceleration sensitivity measurement.

[0035] 3. The measuring device disclosed in the present invention, by providing a mounting assembly including a first mechanical rotating shaft and a second mechanical rotating shaft, can make the axis corresponding to the oscillator to be measured parallel to the first direction by rotating the first mechanical rotating shaft and / or the second mechanical rotating shaft without disassembling the oscillator to be measured, thereby facilitating efficient completion of the measurement of the acceleration sensitivity of the oscillator to be measured in the three axes of the x-axis, y-axis and z-axis. In addition, the mounting assembly has a simple structure, which reduces the manufacturing difficulty and maintenance cost of the measuring device.

[0036] 4. The measuring device disclosed in the present invention, by adding a control device that is communicatively connected to the impact test bench and the acceleration detection component at the same time, can dynamically adjust the impact force provided by the impact test bench based on the acceleration of the oscillator to be tested detected by the acceleration detection component, thereby ensuring that during the measurement process, the impact force provided by the impact test bench has good stability and repeatability, thereby helping to improve the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of an oscillator to be tested provided by an embodiment of the present invention;

[0038] Figure 2 A schematic structural diagram of an acceleration sensitivity measuring device for an oscillator provided by an embodiment of the present invention in a first state, which shows a situation when the z-axis of the oscillator to be measured is parallel to the first direction;

[0039] Figure 3 A schematic diagram of the structure of the acceleration sensitivity measuring device for an oscillator provided by an embodiment of the present invention in a second state, which shows the situation when the y-axis of the oscillator to be measured is parallel to the first direction;

[0040] Figure 4 The schematic diagram of the structure of the acceleration sensitivity measuring device for an oscillator in the third state provided by the embodiment of the present invention shows the situation when the x-axis of the oscillator to be measured is parallel to the first direction.

[0041] Icons: 10- impact test bench, 20- mounting assembly, 21- base, 22- first mechanical rotating axis, 23- second mechanical rotating axis, 24- connecting seat, 30- acceleration detection component, 40- frequency detection component, 50- host computer, 60- control device, 100- oscillator to be tested. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with specific implementation methods below. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described 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.

[0043] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0044] The embodiment of the present invention discloses an acceleration sensitivity measuring device for an oscillator, in the hope of more accurately and conveniently measuring the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in different axial directions, thereby providing a more reliable technical guarantee for the application of the oscillator in a complex vibration environment. For ease of description, the acceleration sensitivity measuring device disclosed in this embodiment is referred to as a "measuring device" hereinafter.

[0045] It should be noted that the oscillator 100 under test described in this embodiment can be any type of oscillator known in the prior art, and the oscillator 100 under test itself has an x-axis, a y-axis and a z-axis. Figure 1 As shown, in this embodiment, the x-axis of the oscillator 100 under test itself may refer to the length direction of the oscillator 100 under test itself, the y-axis of the oscillator 100 under test itself may refer to the width direction of the oscillator 100 under test itself, and the z-axis of the oscillator 100 under test itself may refer to the thickness direction of the oscillator 100 under test itself.

[0046] like Figure 2 As shown in FIG. 1 , it shows the general structure of the exemplary measuring device disclosed in this embodiment. Figure 2 In the measuring device shown, the measuring device may include an impact test bench 10 , a mounting assembly 20 , an acceleration detection component 30 , and a frequency detection component 40 .

[0047] The impact test bench 10 is used as a power source of the measuring device, and is used to provide an impact force along a first direction d. The first direction d in this embodiment can be as follows: Figure 2 In the direction indicated by the arrow in the figure. At the same time, the impact force provided by the impact test bench 10 should be stable and certain, and the impact force should at least be controllable and repeatable, so as to facilitate the subsequent accurate measurement of the acceleration sensitivity of the oscillator 100 to be tested. Among them, the impact test bench 10 described in this embodiment can be an impact device known in the prior art that can generate an impact force transmitted in a certain direction, and the specific structure and type of the impact test bench 10 are not described in detail here.

[0048] The mounting assembly 20 serves as a mounting carrier of the oscillator 100 to be tested, and the oscillator 100 to be tested whose acceleration sensitivity is to be measured is mounted thereon. The mounting assembly 20 is configured to receive the impact force provided by the impact test bench 10, and transmit the impact force to the oscillator 100 to be tested, so that the oscillator 100 to be tested can generate acceleration in the first direction d. For example, the mounting assembly 20 can be a component rigidly connected to the top of the impact test bench 10. In this way, when the impact test bench 10 generates an impact force along the first direction d, the impact force will be rigidly transmitted to the oscillator 100 to be tested through the mounting assembly 20, so that the oscillator 100 to be tested generates acceleration along the first direction d.

[0049] On this basis, in order to collect the acceleration of the oscillator 100 under impact in the three axes of x, y and z, so as to measure the magnitude and direction of the acceleration sensitivity of the oscillator 100 under impact in the three axes of x, y and z, the mounting assembly 20 in this embodiment is further configured to selectively make any one of the x, y and z axes of the oscillator 100 parallel to the first direction d. That is, the mounting assembly 20 can make the x-axis of the oscillator 100 parallel to the first direction d, or the y-axis of the oscillator 100 parallel to the first direction d, or the z-axis of the oscillator 100 parallel to the first direction d.

[0050] like Figure 4 As shown, when the x-axis of the oscillator 100 under test is parallel to the first direction d, when the impact force provided by the impact test bench 10 is transmitted to the oscillator 100 under test, the acceleration of the oscillator 100 under test in the first direction d can also be regarded as the acceleration of the oscillator 100 under test in the x-axis direction of itself; Figure 3 As shown, when the y-axis of the oscillator 100 under test is parallel to the first direction d, the acceleration generated by the oscillator 100 under test in the first direction d can also be regarded as the acceleration of the oscillator 100 under test in the y-axis direction of itself; Figure 2 As shown, when the z-axis of the oscillator 100 under test is parallel to the first direction d, the acceleration generated by the oscillator 100 under test in the first direction d can also be regarded as the acceleration of the oscillator 100 under test in the z-axis direction thereof.

[0051] The acceleration detection component 30 is configured to detect the acceleration of the oscillator under test 100 in the first direction d. The acceleration detection component 30 may be a three-axis accelerometer, and the three-axis accelerometer may be installed on the oscillator under test 100 in close proximity to the oscillator under test 100. It is understandable that by using the three-axis accelerometer as the acceleration detection component 30, when different axes of the oscillator under test 100 are parallel to the first direction d, the acceleration of the oscillator under test 100 in the first direction d can be accurately and reliably detected by the three-axis accelerometer, thereby realizing accurate acquisition of the acceleration of the oscillator under test 100 in different axes of itself.

[0052] The frequency detection component 40 is configured to detect the frequency of the oscillator 100 to be tested, so as to subsequently calculate the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in the corresponding axial direction according to the acceleration of the oscillator 100 to be tested in the first direction d and the frequency of the oscillator 100 to be tested. For example, the frequency detection component 40 can be a frequency detector known in the prior art, and the frequency detector can be electrically connected to the oscillator 100 to be tested via a radio frequency cable.

[0053] Furthermore, the sampling time of the frequency detection component 40 when detecting the frequency of the oscillator 100 to be tested can be less than the impact pulse time, wherein the impact pulse time is the duration of the impact force provided by the impact test bench 10. In this way, it can be ensured that the frequency detection component 40 has sufficient sampling resolution, which is conducive to improving the accuracy of the detected frequency.

[0054] Based on the above configuration, when it is necessary to measure the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in a certain axial direction, it is only necessary to make the axis corresponding to the oscillator 100 under test parallel to the first direction d through the installation component 20, and let the impact test bench 10 provide an impact force along the first direction d, so that the acceleration and frequency of the oscillator 100 under test in the first direction d can be detected by the acceleration detection component 30 and the frequency detection component 40, so as to calculate the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in the first direction d according to the acceleration and frequency, and the acceleration sensitivity calculated at this time is also the acceleration sensitivity of the oscillator 100 under test in the corresponding axial direction. For example, when it is necessary to measure the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in the x-axis direction of itself, as shown in FIG. Figure 4 As shown, it is only necessary to install the assembly 20 so that the x-axis of the oscillator 100 to be tested is parallel to the first direction d, and the acceleration sensitivity of the oscillator 100 to be tested in the x-axis direction can be measured and calculated by the above method. Figure 3 and Figure 2As shown, by installing the assembly 20 so that the y-axis and z-axis of the oscillator 100 under test are parallel to the first direction d, the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in its y-axis direction and z-axis direction can be calculated respectively.

[0055] It can be seen that the measuring device disclosed in this embodiment provides acceleration shock to the oscillator 100 under test by arranging an impact test bench 10 for providing impact force. Compared with the known 2g-tipover method, it can apply a larger acceleration shock to the oscillator 100 under test when measuring the acceleration sensitivity, and can cooperate with the acceleration detection component 30 and the frequency detection component 40 to detect the acceleration response and frequency change of the oscillator 100 under test in real time, which significantly improves the signal-to-noise ratio in the measurement process, and also has higher accuracy when measuring the acceleration sensitivity of an oscillator with low acceleration sensitivity and high noise.

[0056] At the same time, compared with the vibration phase noise back-calculation method that cannot determine the direction of acceleration sensitivity, the measurement device disclosed in this embodiment can accurately determine the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be measured in each axial direction through the synchronous acquisition and analysis of frequency changes and acceleration signals, thereby improving the comprehensiveness of acceleration sensitivity measurement.

[0057] The mounting assembly 20 may be constructed in the following manner but is not limited thereto, so that the mounting assembly 20 can make the x-axis, y-axis and z-axis of the oscillator 100 under test selectively parallel to the first direction d.

[0058] Combination Figure 2 , Figure 3 or Figure 4 As shown, the mounting assembly 20 may include a base 21, a first mechanical rotating shaft 22, and a second mechanical rotating shaft 23. The base 21 may be fixedly disposed on the top of the impact test bench 10. The base 21 is rigidly connected to the impact test bench 10, and the base 21 serves as a bearing structure between the two mechanical rotating shafts, the oscillator 100 to be tested, and the acceleration detection component 30 and the impact test bench 10, and can reliably transmit the impact force provided by the impact test bench 10 to the oscillator 100 to be tested, so as to ensure the accurate transmission and mechanical stability of the impact force during the transmission process.

[0059] The first mechanical rotating shaft 22 may be disposed on the top of the base 21, and the axis of the first mechanical rotating shaft 22 is perpendicular to the first direction d. Specifically, the first mechanical rotating shaft 22 may be an axis arranged in the vertical direction. At the same time, the first mechanical rotating shaft 22 is configured to be able to rotate around its own axis. For example, the bottom of the first mechanical rotating shaft 22 may be rotatably connected to the base 21, so that the first mechanical rotating shaft 22 can rotate around its own axis.

[0060] The first end of the second mechanical rotating shaft 23 is connected to the first mechanical rotating shaft 22, for example, near the top of the first mechanical rotating shaft 22, and the axis of the second mechanical rotating shaft 23 is perpendicular to the axis of the first mechanical rotating shaft 22. Specifically, the axis of the second mechanical rotating shaft 23 is parallel to the horizontal plane. At the same time, the second mechanical rotating shaft 23 is configured to be able to rotate around its own axis. For example, a connecting seat 24 can be provided at the top of the first mechanical rotating shaft 22, and the first end of the second mechanical rotating shaft 23 can be rotatably connected to the connecting seat 24 to achieve the rotational cooperation between the second mechanical rotating shaft 23 and the first mechanical rotating shaft 22, so that the second mechanical rotating shaft 23 can rotate around its own axis. The oscillator 100 to be tested can be mounted on the second mechanical rotating shaft 23, for example, the second end of the second mechanical rotating shaft 23 (the end opposite to the first end of the second mechanical rotating shaft 23).

[0061] When the oscillator 100 to be tested is installed at the second end of the second mechanical rotating shaft 23 , the acceleration detecting component 30 can be directly installed on the side of the oscillator 100 to be tested away from the second mechanical rotating shaft 23 , so as to accurately detect the acceleration of the oscillator 100 to be tested in the corresponding axial direction through the acceleration detecting component 30 .

[0062] So, refer to Figures 2 to 4 , it is only necessary to properly rotate the first mechanical rotating shaft 22 and / or the second mechanical rotating shaft 23 to make different axes of the oscillator 100 to be tested parallel to the first direction d, and the operation is simple and convenient.

[0063] It is worth noting that, by adopting the mounting assembly 20 constructed in the above manner, it is possible to make the axis corresponding to the oscillator 100 under test parallel to the first direction d by rotating the first mechanical rotating axis 22 and / or the second mechanical rotating axis 23 without disassembling the oscillator 100 under test, thereby facilitating efficient completion of the measurement of the acceleration sensitivity of the oscillator 100 under test in its own three axial directions of the x-axis, y-axis and z-axis.

[0064] Further, the mounting assembly 20 may also include a first locking mechanism (not shown in the figure) and a second locking mechanism (not shown in the figure). The first locking mechanism is configured to lock or unlock the position of the first mechanical rotating shaft 22. The second locking mechanism is configured to lock or unlock the position of the second mechanical rotating shaft 23. In other words, when the first locking mechanism locks the position of the first mechanical rotating shaft 22, the first mechanical rotating shaft 22 cannot rotate around its own axis, and when the first locking mechanism unlocks the position of the first mechanical rotating shaft 22, the first mechanical rotating shaft 22 can rotate around its own axis; correspondingly, when the second locking mechanism locks the position of the second mechanical rotating shaft 23, the second mechanical rotating shaft 23 cannot rotate around its own axis, and when the second locking mechanism unlocks the position of the second mechanical rotating shaft 23, the second mechanical rotating shaft 23 can rotate around its own axis.

[0065] It can be understood that, through the setting of the first locking mechanism and the second locking mechanism, when one of the x-axis, y-axis and z-axis of the oscillator 100 to be tested is parallel to the first direction d, the positions of the first mechanical rotating axis 22 and the second mechanical rotating axis 23 can be locked respectively by the first locking mechanism and the second locking mechanism to ensure the rigid connection of the components between the impact test bench 10 and the oscillator 100 to be tested during the impact process, thereby avoiding errors or signal distortions caused by axial displacement of the first mechanical rotating axis 22 and the second mechanical rotating axis 23 as much as possible, thereby ensuring that the measurement process can be carried out stably and reliably.

[0066] It should be noted that the first locking mechanism and the second locking mechanism described in this embodiment can be locking mechanisms known in the prior art that can lock or unlock a rotatable rotating shaft, so that the rotating shaft can switch between a locked state in which it cannot rotate around its own axis and an unlocked state in which it can rotate around its own axis. The specific structure and type of the locking mechanism are not limited here.

[0067] Combination Figure 2 As shown in the figure, the measuring device disclosed in the present embodiment may further include a host computer 50, and the acceleration detection component 30 and the frequency detection component 40 are both communicatively connected to the host computer 50. The host computer 50 is used to receive the acceleration signal from the acceleration detection component 30 and the frequency signal from the frequency detection component 40, so as to calculate the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be measured in the first direction d according to the acceleration signal and the frequency signal, thereby realizing the automatic calculation of the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be measured in the corresponding axial direction during the measurement process.

[0068] Among them, a known data processing algorithm and acceleration sensitivity calculation formula can be preset in the host computer 50, so that the host computer 50 can calculate the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in the first direction d according to the acceleration signal and the frequency signal.

[0069] Combination Figure 2 As shown, the measuring device disclosed in this embodiment may further include a control device 60, and the impact test bench 10 and the acceleration detection component 30 are both communicatively connected to the control device 60. The control device 60 is suitable for controlling the impact test bench 10, and specifically, it may be used to control the magnitude of the impact force provided by the impact test bench 10.

[0070] It can be understood that, in this embodiment, by allowing the impact test bench 10 and the acceleration detection component 30 to be communicatively connected to the control device 60, during the actual measurement process, the control device 60 can be used to receive the acceleration signal detected by the acceleration detection component 30, and dynamically adjust the magnitude of the impact force provided by the impact test bench 10 according to the acceleration signal, so as to achieve negative feedback control of the impact test bench 10, and ensure that during the measurement process, the impact force provided by the impact test bench 10 has good stability and repeatability, thereby helping to improve the measurement accuracy.

[0071] On the other hand, an embodiment of the present invention further discloses a method for measuring acceleration sensitivity, which uses the above-mentioned oscillator acceleration sensitivity measuring device. The measuring method may include the following steps:

[0072] First, the oscillator 100 to be tested is mounted on the mounting assembly 20, specifically, the oscillator 100 to be tested is mounted on the second end of the second mechanical rotating shaft 23. It is understandable that when the oscillator 100 to be tested is initially mounted on the second mechanical rotating shaft 23 of the mounting assembly 20, one of the x-axis, y-axis and z-axis of the oscillator 100 to be tested can be made parallel to the first direction d, so as to facilitate the subsequent work of directly measuring the acceleration sensitivity of the oscillator 100 to be tested in the corresponding axial direction. Figure 2 FIG. 2 shows a situation in which the z-axis of the oscillator 100 under test is parallel to the first direction d when the oscillator 100 under test is initially mounted on the second mechanical rotating shaft 23 .

[0073] Subsequently, the oscillator 100 to be tested is electrically connected to the frequency detection component 40 through a radio frequency cable, and the frequency detection component 40 is communicatively connected to the host computer 50 through the cable. The acceleration detection component 30 is fixedly installed in a position close to the oscillator 100 to be tested. For example, the acceleration detection component 30 can be fixedly installed on the side of the oscillator 100 to be tested away from the second mechanical rotation axis 23 to ensure that the acceleration detection component 30 can accurately sense the acceleration of the oscillator 100 to be tested; at the same time, the acceleration detection component 30 is communicatively connected to the host computer 50 and the control device 60 through cables. After that, the acceleration sensitivity measurement stage can be entered.

[0074] In the acceleration sensitivity measurement stage, the mounting assembly 20 is first used to make one of the x-axis, y-axis and z-axis of the oscillator 100 under test parallel to the first direction d. On this basis, the control device 60 controls the impact test bench 10 to provide an impact force along the first direction d, and the impact force is rigidly transmitted to the oscillator 100 under test by the mounting assembly 20, so that the oscillator 100 under test generates acceleration in the first direction d.

[0075] At this time, the acceleration of the oscillator 100 to be tested in the first direction d can be detected by the acceleration detection component 30. In this process, the acceleration detection component 30 can also transmit the detected acceleration signal to the control device 60, so that the control device 60 can dynamically adjust the magnitude of the impact force provided by the impact test bench 10 according to the acceleration signal, thereby ensuring the stability of the experimental conditions.

[0076] At the same time, the frequency of the oscillator 100 to be tested is detected by the frequency detection component 40. In addition, the acceleration detection component 30 can transmit the detected acceleration signal to the host computer 50, and the frequency detection component 40 can transmit the detected frequency signal to the host computer 50, so that the host computer 50 can calculate the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in the first direction d according to the acceleration detected by the acceleration detection component 30 and the frequency detected by the frequency detection component 40, that is, the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in the corresponding axial direction.

[0077] By analogy, by installing the assembly 20 to make the remaining two axes of the oscillator 100 under test parallel to the first direction d, the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in its three axes can be measured in the above manner.

[0078] For example, when measuring for the first time, refer to Figure 2As shown, the z-axis of the oscillator 100 to be tested can be made parallel to the first direction d, so as to measure the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in the z-axis direction. Figure 3 As shown, the y-axis of the oscillator 100 to be tested can be made parallel to the first direction d, so as to measure the magnitude and direction of the acceleration sensitivity of the oscillator 100 to be tested in the y-axis direction. Figure 4 As shown, the x-axis of the oscillator 100 under test can be made parallel to the first direction d, so as to obtain the magnitude and direction of the acceleration sensitivity of the oscillator 100 under test in the x-axis direction thereof by the above-mentioned measurement method.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acceleration sensitivity measuring device for an oscillator, characterized in that: include: An impact test bench configured to provide an impact force along a first direction; a mounting assembly on which an oscillator to be tested is mounted; The mounting assembly is configured to receive the impact force provided by the impact test bench and transmit the impact force to the oscillator to be tested, so that the oscillator to be tested generates acceleration in the first direction; and the mounting assembly is further configured to selectively allow any one of the x-axis, y-axis and z-axis of the oscillator to be tested to be parallel to the first direction; an acceleration detection component, configured to detect the acceleration of the oscillator to be tested in the first direction; The frequency detection component is configured to detect the frequency of the oscillator to be tested.

2. The acceleration sensitivity measuring device for an oscillator according to claim 1, characterized in that: The sampling time when the frequency detection component detects the frequency of the oscillator to be tested is less than the impact pulse time.

3. The acceleration sensitivity measuring device for an oscillator according to claim 1, characterized in that: It also includes a host computer, and the acceleration detection component and the frequency detection component are both communicatively connected to the host computer.

4. The acceleration sensitivity measuring device for an oscillator according to claim 1, characterized in that: It also includes a control device, and the acceleration detection component and the impact test bench are both communicatively connected to the control device.

5. The acceleration sensitivity measuring device for an oscillator according to claim 1, characterized in that: The installation assembly includes: A base, rigidly connected to the impact test bench; a first mechanical rotating shaft, disposed on the base; the axis of the first mechanical rotating shaft is perpendicular to the first direction, and the first mechanical rotating shaft is configured to be able to rotate around its own axis; a second mechanical rotating shaft connected to the first mechanical rotating shaft; the axis of the second mechanical rotating shaft is perpendicular to the axis of the first mechanical rotating shaft; the second mechanical rotating shaft is configured to be able to rotate around its own axis; Wherein, the oscillator to be tested is installed on the second mechanical rotating shaft.

6. The acceleration sensitivity measuring device for an oscillator according to claim 5, characterized in that: The first end of the second mechanical rotating shaft is connected to the first mechanical rotating shaft, the oscillator to be measured is installed at the second end of the second mechanical rotating shaft, and the acceleration detection component is installed on a side of the oscillator to be measured away from the second mechanical rotating shaft.

7. The acceleration sensitivity measuring device for an oscillator according to claim 5, characterized in that: The mounting assembly further includes a first locking mechanism and a second locking mechanism; The first locking mechanism is configured to lock or unlock a position of the first mechanical rotating axis, and the second locking mechanism is configured to lock or unlock a position of the second mechanical rotating axis.

8. A method for measuring acceleration sensitivity, characterized in that: Using the acceleration sensitivity measuring device for an oscillator as claimed in any one of claims 1 to 7; The measuring method comprises the following steps: The oscillator to be tested is mounted on the mounting assembly, the oscillator to be tested is electrically connected to the frequency detection component via a radio frequency cable, and the acceleration detection component is mounted adjacent to the oscillator to be tested; thereafter, the acceleration sensitivity measurement phase can be entered; In the acceleration sensitivity measurement stage, the mounting assembly is first used to make one of the x-axis, y-axis and z-axis of the oscillator under test parallel to the first direction; on this basis, the impact test bench provides an impact force along the first direction, so that the oscillator under test generates acceleration in the first direction; at this time, the acceleration of the oscillator under test in the first direction is detected by the acceleration detection component, and the frequency of the oscillator under test is detected by the frequency detection component, so as to calculate the magnitude and direction of the acceleration sensitivity of the oscillator under test in the corresponding axial direction according to the acceleration and the frequency; By analogy, by using the installation component to make the remaining two axes of the oscillator under test parallel to the first direction respectively, the magnitude and direction of the acceleration sensitivity of the oscillator under test in the three axes can be measured.

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