Optical engine synchronous test system

Abstract

The invention belongs to the technical field of intelligent instruments, and particularly relates to an optical engine synchronous test system, which comprises a gasoline engine, a sensing system assembly and an acquisition system assembly, and is characterized in that the sensing system assembly comprises an angle sensor probe, a cylinder pressure sensor, an angle sensor conditioning circuit, an angle signal splitter and an image acquisition unit; the image acquisition unit comprises a machine vision system. The acquisition system assembly comprises a time sequence processing module, a combustion signal analyzer and an upper computer. According to the invention, through the image acquisition unit, the machine vision system, the endoscope, the high-speed camera and the light source, an image system of combustion in a cylinder can be acquired, and through the sensing system assembly, the angle sensor probe, the cylinder pressure sensor, the angle sensor conditioning circuit and the angle signal splitter, the combustion in the cylinder can be acquired. Through cooperation of the time sequence processing module, image and sensor acquisition synchronization is realized, shooting time is effectively controlled, redundant data is not generated, and engine combustion test analysis is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent instruments, in particular to an optical engine synchronization test system. Background Art

[0002] With the development of science and technology, the functions of engine combustion test and analysis systems are becoming more and more comprehensive. Existing test systems can obtain real-time parameters such as the engine's crankshaft angle, speed, cylinder pressure, etc. based on sensors such as angle markers and cylinder pressure, and can perform online real-time calculations and processing to obtain the engine's operating performance.

[0003] In order to better analyze the working performance of the engine, an endoscope optical acquisition system can be added to observe the working process of spray and ignition and combustion in the cylinder, and combined with sensor information for processing, more comprehensive engine performance analysis results, such as spray and flame, can be obtained. However, even if the optical acquisition system is installed, the technical disadvantage of the existing system is that it cannot flexibly control image acquisition. High-speed and high-definition video acquisition will generate a large amount of redundant data, and the image data cannot be collected synchronously with the sensor data. The engine operating conditions are complex. In fact, scientific researchers are more concerned about the spray at the injection moment, the ignition moment and the flame propagation. Therefore, it is very necessary to accurately synchronize the camera and light source and post-process according to the engine crankshaft angle signal. For this reason, we provide an optical engine synchronization test system to solve the above problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an optical engine synchronization test system, which solves the technical shortcomings of the existing system, namely, the inability to flexibly control image acquisition, the generation of a large amount of redundant data due to high-speed and high-definition video acquisition, the inability to synchronize image data with sensor data, and the relatively complex engine operating conditions.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an optical engine synchronization test system, comprising a gasoline engine, a sensing system component and an acquisition system component, wherein the sensing system component comprises an angle sensor probe, a cylinder pressure sensor, an angle sensor conditioning circuit, an angle signal splitter and an image acquisition unit, wherein the image acquisition unit comprises a machine vision system, and the acquisition system component comprises a timing processing module, a combustion signal analyzer and a host computer.

[0006] As a preferred technical solution of the present invention, the sensing system component is used to obtain the working conditions, and selects one from the four cylinders of the gasoline engine, and installs a cylinder pressure sensor and a machine vision system inside. The angle sensor probe, angle sensor conditioning circuit and angle signal splitter are installed on the crankshaft of the gasoline engine.

[0007] As a preferred technical solution of the present invention, the cylinder pressure sensor is used to detect the cylinder pressure during the operation of the engine.

[0008] As a preferred technical solution of the present invention, the machine vision system includes an endoscope, a high-speed camera and a light source, which are used to collect images inside the cylinder.

[0009] As a preferred technical solution of the present invention, the timing processing module controls the opening and closing of the shutter and light source of the high-speed camera.

[0010] As a preferred technical solution of the present invention, the angle sensor probe, the angle sensor conditioning circuit and the angle signal splitter are used to measure the rotational speed and position of the crankshaft.

[0011] As a preferred technical solution of the present invention, the signal of the angle sensor probe passes through the angle sensor conditioning circuit to provide two groups of pulses, a speed signal (one pulse per circle) and a position signal (1024 pulses per circle), to the acquisition system component.

[0012] As a preferred technical solution of the present invention, the angle signal splitter provides these two signals to the timing processing module and the combustion signal analyzer at the same time.

[0013] As a preferred technical solution of the present invention, the acquisition system component is used to generate control signals, analyze and process data, and present the results of acquisition and calculation to the user.

[0014] Compared with the prior art, the present invention provides an optical engine synchronization test system with the following beneficial effects: The optical engine synchronization test system can capture images of in-cylinder combustion through the set image acquisition unit, machine vision system, endoscope, high-speed camera and light source. The set sensor system components, angle sensor probe, cylinder pressure sensor, angle sensor conditioning circuit and angle signal splitter are coordinated with the timing processing module to achieve image and sensor acquisition synchronization, effectively control the shooting time, and do not generate redundant data, which facilitates the effective analysis of engine combustion tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall system block diagram of an optical engine synchronization test system of the present invention; Figure 2 This is a schematic diagram of a gasoline engine test system according to the present invention; Figure 3 This is a structural system diagram of the image acquisition unit of the present invention.

[0016] In the figure: 1. Gasoline engine; 2. Sensing system components; 21. Angle sensor probe; 22. Cylinder pressure sensor; 23. Angle sensor conditioning circuit; 24. Angle signal splitter; 25. Image acquisition unit; 251. Machine vision system; 2511. Endoscope; 2512. High-speed camera; 2513. Light source; 3. Acquisition system components; 31. Timing processing module; 32. Combustion signal analyzer; 33. Host computer. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] Example See also Figure 1-3 In this embodiment: an optical engine synchronization test system includes a gasoline engine 1, a sensor system component 2 and an acquisition system component 3, the sensor system component 2 includes an angle sensor probe 21, a cylinder pressure sensor 22, an angle sensor conditioning circuit 23, an angle signal splitter 24 and an image acquisition unit 25, the image acquisition unit 25 includes a machine vision system 251, and the acquisition system component 3 includes a timing processing module 31, a combustion signal analyzer 32 and a host computer 33.

[0019] In this embodiment, the sensing system component 2 is used to obtain the working conditions, and selects one from the four cylinders of the gasoline engine 1, and installs a cylinder pressure sensor 22 and a machine vision system 251 inside. The angle sensor probe 21, the angle sensor conditioning circuit 23 and the angle signal splitter 24 are installed on the crankshaft of the gasoline engine 1, which can be used to photograph and sense signals inside the gasoline engine 1, which is convenient for the testing of the gasoline engine 1. The cylinder pressure sensor 22 is used to detect the pressure in the cylinder during the operation of the engine, which can facilitate the understanding of the specific pressure in the cylinder during the engine test, and facilitate the safety testing of the gasoline engine 1.

[0020] The machine vision system 251 includes an endoscope 2511, a high-speed camera 2512 and a light source 2513, which are used to collect images inside the cylinder. The machine vision system 251 can capture images of the inside of the gasoline engine 1. The timing processing module 31 controls the shutter of the high-speed camera 2512 and the opening and closing of the light source 2513, and can control the machine vision system 251 to facilitate the video and photographing operations inside the gasoline engine 1. The angle sensor probe 21, the angle sensor conditioning circuit 23 and the angle signal splitter 24 are used to measure the speed and position of the crankshaft, which is convenient for monitoring the speed and position of the crankshaft inside the gasoline engine 1.

[0021] The signal from the angle sensor probe 21 passes through the angle sensor conditioning circuit 23 and provides two sets of pulses, a speed signal (one pulse per revolution) and a position signal (1024 pulses per revolution), to the acquisition system component 3. The angle signal splitter 24 simultaneously provides these two signals to the timing processing module 31 and the combustion signal analyzer 32. The acquisition system component 3 is used to generate control signals, analyze and process data, and present the results of the acquisition and calculation to the user.

[0022] The working principle and use process of the present invention are as follows: when in use, first select a cylinder of the gasoline engine 1, and install an endoscope 2511, a high-speed camera 2512 and a light source 2513 to form an image acquisition unit 25, and install an angle sensor on the crankshaft of the gasoline engine 1. During the test, the cylinder pressure sensor 22 is used to detect the cylinder pressure of the gasoline engine 1 during operation. At the same time, the timing processing module 31 is used to control the shutter of the high-speed camera 2512 and the opening and closing of the light source 2513. The high-speed camera 2512 is equipped with a light source 2513. At the same time, the signal of the angle sensor probe 21 is passed through the angle sensor conditioning circuit 23 to provide the acquisition system component 3 with a speed signal (one pulse per revolution) and a position signal (one pulse per revolution). The angle signal splitter 24 simultaneously provides these two signals to the timing processing module 31 and the combustion signal analyzer 32. The timing processing module 31 receives the speed and position signals, and through high-speed calculation of the FPGA signal, sends control signals to the high-speed camera 2512 and the light source 2513 to collect images of the working process in the cylinder. The combustion signal analyzer 32 synchronously receives the cylinder pressure signal, speed signal and position signal, and can calculate and analyze the dynamic working state in the engine cylinder. At the same time, the data collected and processed by the timing processing module 31 and the combustion signal analyzer 32 are sent to the PC, which provides the user with secondary processing, display, storage, playback and other functions to realize engine combustion testing and analysis.

[0023] The image data is analyzed offline, shape-related parameters of the flame image are measured, and compared with the sensor data and analysis results.

[0024] In the description of the present invention, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further restriction, the elements defined by the statement "comprising a reference structure" do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. It should be noted that, in this article, relational terms such as "first", "second", etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An optical engine synchronization test system, comprising a gasoline engine (1), a sensor system component (2) and an acquisition system component (3), characterized in that: The sensing system component (2) includes an angle sensor probe (21), a cylinder pressure sensor (22), an angle sensor conditioning circuit (23), an angle signal splitter (24) and an image acquisition unit (25), wherein the image acquisition unit (25) includes a machine vision system (251), and the acquisition system component (3) includes a timing processing module (31), a combustion signal analyzer (32) and a host computer (33).

2. The optical engine synchronization test system according to claim 1, characterized in that: The sensing system component (2) is used to obtain working conditions and selects one of the four cylinders of the gasoline engine (1), and installs a cylinder pressure sensor (22) and a machine vision system (251) inside. The angle sensor probe (21), the angle sensor conditioning circuit (23) and the angle signal splitter (24) are installed on the crankshaft of the gasoline engine (1).

3. The optical engine synchronization test system according to claim 1, characterized in that: The cylinder pressure sensor (22) is used to detect the cylinder pressure during engine operation.

4. The optical engine synchronization test system according to claim 1, characterized in that: The machine vision system (251) includes an endoscope (2511), a high-speed camera (2512) and a light source (2513), and is used to collect images inside the cylinder.

5. The optical engine synchronization test system according to claim 4, characterized in that: The timing processing module (31) controls the shutter of the high-speed camera (2512) and the opening and closing of the light source (2513).

6. The optical engine synchronization test system according to claim 1, characterized in that: The angle sensor probe (21), the angle sensor conditioning circuit (23) and the angle signal splitter (24) are used to measure the rotational speed and position of the crankshaft.

7. The optical engine synchronization test system according to claim 1, characterized in that: The signal of the angle sensor probe (21) passes through the angle sensor conditioning circuit (23) to provide two groups of pulses, namely a rotation speed signal (one pulse per revolution) and a position signal (1024 pulses per revolution), to the acquisition system component (3).

8. The optical engine synchronization test system according to claim 1, characterized in that: The angle signal splitter (24) simultaneously provides the two signals to the timing processing module (31) and the combustion signal analyzer (32).

9. The optical engine synchronization test system according to claim 1, characterized in that: The acquisition system component (3) is used to generate control signals, analyze and process data, and present acquisition and calculation results to the user.

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