阅读说明：本技术 加速度信号的测量转换装置及其方法 (Measuring and converting device and method for acceleration signal ) 是由 胡大硕 梁天骄 于 2018-07-11 设计创作，主要内容包括：一种加速度信号的测量转换装置,用以将加速度信号从局部坐标系转换到全局坐标系,所述测量转换装置包括处理部件,所述处理部件包括处理器、显示模块、校准模块以及电源模块；所述测量转换装置还包括具有内置陀螺仪的测量块以及连接所述测量块与所述处理部件以给所述陀螺仪进行供电以及传输陀螺仪方位信号的连接线,其中所述测量块可深入狭小空间处测量加速度计空间角度,并将采集到的信号传输给所述处理器；所述处理器将采集的信号结果转换后,通过显示模块显示为四元数。本发明还涉及一种加速度信号的测量转换方法。(A measurement conversion device of an acceleration signal is used for converting the acceleration signal from a local coordinate system to a global coordinate system, and comprises a processing component, wherein the processing component comprises a processor, a display module, a calibration module and a power supply module; the measurement conversion device also comprises a measurement block with a built-in gyroscope and a connecting wire which is connected with the measurement block and the processing component to supply power to the gyroscope and transmit a gyroscope orientation signal, wherein the measurement block can go deep into a narrow space to measure the spatial angle of the accelerometer and transmit the acquired signal to the processor; and the processor converts the acquired signal result and displays the converted signal result as a quaternion through the display module. The invention also relates to a measurement conversion method of the acceleration signal.)

1. A measurement conversion device of an acceleration signal is used for converting the acceleration signal from a local coordinate system to a global coordinate system, and comprises a processing component, wherein the processing component comprises a processor, a display module, a calibration module and a power supply module; the method is characterized in that: the measurement conversion device also comprises a measurement block with a built-in gyroscope and a connecting wire which is connected with the measurement block and the processing component to supply power to the gyroscope and transmit a gyroscope orientation signal, wherein the measurement block can go deep into a narrow space to measure the spatial angle of the accelerometer and transmit the acquired signal to the processor; and the processor converts the acquired signal result and displays the converted signal result as a quaternion through the display module.

2. The measurement conversion apparatus of an acceleration signal according to claim 1, characterized in that: before measurement, the calibration module calibrates and zeroes the measurement block in a finished automobile coordinate system.

3. The measurement conversion apparatus of an acceleration signal according to claim 2, characterized in that: the calibration module is a calibration key.

4. The measurement conversion apparatus of an acceleration signal according to claim 1, characterized in that: the power module comprises a rechargeable lithium battery, and the lithium battery supplies power to the gyroscope after being converted by the direct current converter.

5. The measurement conversion apparatus of an acceleration signal according to claim 1, characterized in that: and the gyroscope is communicated with the processor through a communication interface.

6. The measurement conversion apparatus of an acceleration signal according to claim 1, characterized in that: the display module is used for LCD display.

7. A measurement conversion method of an acceleration signal is used for converting the acceleration signal from a local coordinate system to a global coordinate system, and comprises the following steps:

s1: calibrating the measuring block to zero under the coordinate system of the whole vehicle;

s2: arranging a speedometer on a sample piece, measuring a space angle by using a measuring block, arranging a gyroscope in the measuring block, and transmitting an acquired signal to a processor through a communication interface;

s3: the processor converts the measured electric signal result and displays the electric signal result as a quaternion through the display module;

s4: inputting the quaternion measurement result into a calculation tool, and converting by using a quaternion calculation method to obtain a conversion relation of the acceleration signal from a local coordinate system to a finished automobile coordinate system;

s5: and introducing the conversion relation into noise vibration analysis software to perform post-processing on the acceleration signal.

Technical Field

The invention relates to a measurement conversion device and a measurement conversion method for an acceleration signal, and belongs to the technical field of engine tests and exhaust systems.

Background

During an engine durability test, an acceleration signal under a coordinate system of the whole vehicle needs to be acquired and used as a key input of subsequent analysis. The surfaces of the engine and the exhaust system parts are irregular, and the space in the engine cabin is narrow, so that the accelerometer is generally difficult to arrange based on a whole-vehicle coordinate system.

At present, the method of measuring by using an angle ruler is difficult to be applied in a narrow space, and the measurement precision is low, so that the requirement is difficult to meet. Even if the coordinate system is subsequently converted by the trigonometric relationship, it is extremely computationally cumbersome.

Therefore, a device capable of measuring the space angle of the accelerometer in a narrow space and interfacing the measurement result with LMS data processing software is needed to quickly complete the conversion of the acceleration signal from the local coordinate system to the vehicle coordinate system.

Disclosure of Invention

The invention aims to provide a device and a method for measuring and converting an acceleration signal into an acceleration signal quickly converted from a whole vehicle coordinate system.

In order to achieve the purpose, the invention adopts the following technical scheme: a measurement conversion device of an acceleration signal is used for converting the acceleration signal from a local coordinate system to a global coordinate system, and comprises a processing component, wherein the processing component comprises a processor, a display module, a calibration module and a power supply module; the measurement conversion device also comprises a measurement block with a built-in gyroscope and a connecting wire which is connected with the measurement block and the processing component to supply power to the gyroscope and transmit a gyroscope orientation signal, wherein the measurement block can go deep into a narrow space to measure the spatial angle of the accelerometer and transmit the acquired signal to the processor; and the processor converts the acquired signal result and displays the converted signal result as a quaternion through the display module.

As a further improved technical scheme of the invention, before measurement, the calibration module calibrates and zeroes the measurement block under a finished automobile coordinate system.

As a further improved technical scheme of the invention, the calibration module is a calibration key.

As a further improved technical scheme of the invention, the power supply module comprises a rechargeable lithium battery, and the lithium battery supplies power to the gyroscope after being converted by the direct current converter.

As a further improved technical scheme of the invention, the gyroscope is communicated with the processor through a communication interface.

As a further improved technical scheme of the invention, the display module is an LCD display.

The invention also relates to a measurement conversion method of the acceleration signal, which is used for converting the acceleration signal from a local coordinate system to a global coordinate system, and the measurement conversion method of the acceleration signal comprises the following steps:

s1: calibrating the measuring block to zero under the coordinate system of the whole vehicle;

s2: arranging a speedometer on a sample piece, measuring a space angle by using a measuring block, arranging a gyroscope in the measuring block, and transmitting an acquired signal to a processor through a communication interface;

s3: the processor converts the measured electric signal result and displays the electric signal result as a quaternion through the display module;

s4: inputting the quaternion measurement result into a calculation tool, and converting by using a quaternion calculation method to obtain a conversion relation of the acceleration signal from a local coordinate system to a finished automobile coordinate system;

s5: and introducing the conversion relation into noise vibration analysis software to perform post-processing on the acceleration signal.

Compared with the prior art, the method and the device have the advantages that the quaternion read by the gyroscope is used as the spatial angle information of the accelerometer, and the acceleration signal from the local coordinate system to the whole vehicle coordinate system is converted quickly.

Drawings

Fig. 1 is a schematic view of a measurement conversion device of an acceleration signal of the present invention.

Fig. 2 is a schematic diagram of the acceleration signal measurement conversion apparatus of the present invention.

Detailed Description

Referring to fig. 1 and 2, the present invention discloses an acceleration signal measurement conversion apparatus 100 for converting an acceleration signal from a local coordinate system to a global coordinate system. The measurement conversion device 100 comprises a processing part 1, a measurement block 2 with a built-in gyroscope 21, and a connection line 3 connecting the measurement block 2 and the processing part 1 to supply power to the gyroscope 21 and transmit a gyroscope orientation signal. The processing component 1 comprises a processor 11, a display module 12, a calibration module 13 and a power supply module 14.

The measuring block 2 can go deep into a narrow space to measure the space angle of the accelerometer, and transmits the acquired signal to the processor 11; the processor 11 converts the acquired signal result and displays the converted signal result as a quaternion through the display module 12.

Before measurement, the calibration module 13 calibrates and zeroes the measurement block 2 in the coordinate system of the whole vehicle.

In the illustrated embodiment of the present invention, the calibration module 13 is a calibration button.

The power module 14 includes a rechargeable lithium battery, which supplies power to the gyroscope 21 after being converted by the dc converter 141.

The gyroscope 21 communicates with the processor 11 via a communication interface 111.

In the illustrated embodiment of the present invention, the display module 12 is an LCD display.

The invention also discloses a measurement conversion method of the acceleration signal, which is used for converting the acceleration signal from a local coordinate system to a global coordinate system and comprises the following steps:

s1: calibrating and zeroing the measuring block 2 under the coordinate system of the whole vehicle;

s2: arranging a speedometer on a sample piece, measuring a space angle by using a measuring block, wherein a gyroscope 21 is arranged in the measuring block, and transmitting acquired signals to a processor 11 through a communication interface 111;

s3: the processor 11 converts the measured electric signal result and displays the converted electric signal result as a quaternion through the display module 12;

s4: inputting the quaternion measurement result into a calculation tool, and converting by using a quaternion calculation method to obtain a conversion relation of the acceleration signal from a local coordinate system to a finished automobile coordinate system;

s5: the conversion relation is introduced into noise vibration analysis software (LMS software) to perform post-processing of the acceleration signal.

Compared with the prior art, the method and the device have the advantages that the problem of accurate measurement of the space angle of the accelerometer in the engine test process is solved, and the rapid conversion from the acceleration signal to the coordinate system of the whole vehicle is realized.

In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail by referring to the above embodiments, the ordinary skilled in the art should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.