CN107894262B - Liquid level measuring device and method, engine - Google Patents
Liquid level measuring device and method, engine Download PDFInfo
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- CN107894262B CN107894262B CN201710953293.9A CN201710953293A CN107894262B CN 107894262 B CN107894262 B CN 107894262B CN 201710953293 A CN201710953293 A CN 201710953293A CN 107894262 B CN107894262 B CN 107894262B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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Abstract
本发明涉及一种液位测量装置、液位测量方法和装备有该液位测量装置的发动机，其包括：激振模块，用于向盛放待测液体的容器施加振动力；固定模块，用于将激振模块固定于容器的外部；拾振模块，用于获得通过激振模块对容器产生的加速度信号；数据采集模块，其分别与激振模块、拾振模块和频谱分析模块联接，用于接收激振模块产生的力信号以及拾振模块获得的加速度信号并发送给频谱分析模块；频谱分析模块，用于对数据采集模块采集的力信号和加速度信号进行频谱分析得出振动频率，并通过与事先标定值进行对比得到实际液位；与频谱分析模块联接的通讯/控制模块；显示模块，通讯/控制模块将频谱分析模块得到的实际机油液位传输至显示模块。
The invention relates to a liquid level measuring device, a liquid level measuring method and an engine equipped with the liquid level measuring device, which comprise: a vibration excitation module for applying a vibration force to a container containing a liquid to be measured; a fixing module for It is used to fix the vibration excitation module on the outside of the container; the vibration pickup module is used to obtain the acceleration signal generated by the vibration excitation module to the container; the data acquisition module is connected with the vibration excitation module, the vibration pickup module and the spectrum analysis module, respectively. It is used to receive the force signal generated by the excitation module and the acceleration signal obtained by the vibration pickup module and send it to the spectrum analysis module; the spectrum analysis module is used to perform spectrum analysis on the force signal and acceleration signal collected by the data acquisition module to obtain the vibration frequency, and The actual oil level is obtained by comparing with the pre-calibrated value; the communication/control module connected with the spectrum analysis module; the display module, the communication/control module transmits the actual oil level obtained by the spectrum analysis module to the display module.
Description
Technical Field
The invention relates to the technical field of liquid level measurement, in particular to a liquid level measuring device, a liquid level measuring method and an engine with the liquid level measuring device.
Background
In modern industrial production, it is often necessary to measure the level of liquid in a container, and in the case of engine oil level measurement, it is often necessary to use a dipstick inserted into the sump to determine the amount of oil that is filled from the trace of oil in the dipstick. Because the oil will flow on the dipstick, reading errors will be inevitably caused in the process of drawing out the dipstick, and for example, the experience of workers, visual errors and the like have great influence on the accuracy and consistency of the oil level. If the operation is carried out in a severe environment, the real-time performance is poor, the data needs to be processed manually, and the computer management of the data is not facilitated. Traditional liquid level measuring means have not met the requirements for accuracy and intuition.
Disclosure of Invention
The object of the present invention is to solve at least one of the above problems. The purpose is realized by the following technical scheme:
the invention provides a liquid level measuring device, comprising:
the vibration excitation module is used for applying vibration force to a container containing liquid to be detected;
a fixing module fixing the vibration excitation module to the outside of the container,
a vibration pickup module comprising an acceleration acquisition point disposed on the container for obtaining an acceleration signal generated by the excitation module on the container;
the data acquisition module is respectively connected with the excitation module, the vibration pickup module and the spectrum analysis module, and is used for receiving a force signal generated by the excitation module on the container and an acceleration signal obtained by the vibration pickup module and sending the force signal and the acceleration signal to the spectrum analysis module;
the frequency spectrum analysis module is used for carrying out frequency spectrum analysis on the force signal and the acceleration signal which are acquired by the data acquisition module to obtain the vibration frequency of the corresponding part, and the actual liquid level is obtained by comparing the vibration frequency with a preset calibration value;
the communication/control module is connected with the spectrum analysis module;
and the communication/control module transmits the actual engine oil liquid level obtained by the frequency spectrum analysis module to the display module.
According to one development of the invention, the excitation module comprises an electrodynamic exciter for generating a discrete random pulse signal, a field effect transistor gate for transmitting the discrete random pulse signal to the power amplifier, and a power amplifier whose output drives a load of the electrodynamic exciter.
According to another refinement of the invention, the display module is an LCD display module.
According to a further refinement of the invention, the vibration pickup module is a piezoelectric acceleration sensor.
Preferably, the frequency spectrum analysis module is integrated through a single chip microcomputer program to realize frequency spectrum analysis of the acquired vibration acceleration signals of the acceleration acquisition points.
Further preferably, the frequency spectrum analysis module performs vibration response amplitude analysis in three directions on the acceleration acquisition points so as to obtain vibration frequencies of corresponding positions where the acceleration acquisition points are located.
According to a preferred embodiment of the invention, the level measuring device is an oil level measuring device and the container is an oil pan containing oil.
In addition, the invention also provides an engine which is provided with the liquid level measuring device.
Furthermore, the present invention relates to a liquid level measuring method implemented according to the above liquid level measuring apparatus, comprising:
when a container for containing liquid to be detected is static, applying vibration force to the container through an excitation module;
receiving an acceleration signal generated by the vibration excitation module to the container through a vibration pickup module;
acquiring a force signal generated by the vibration excitation module and an acceleration signal obtained by the vibration pickup module through a data acquisition module, and sending the force signal and the acceleration signal to a spectrum analysis module;
carrying out frequency spectrum analysis on the force signal and the acceleration signal acquired by the data acquisition module through the frequency spectrum analysis module to obtain the vibration frequency of a corresponding part, and comparing the vibration frequency with a preset calibration value to obtain an actual liquid level;
the obtained actual liquid level is transmitted to a display module through a communication/control module;
the display module displays the actual liquid level;
and if the liquid level is abnormal, taking an alarm measure.
The invention has the advantages that: the non-contact liquid level measuring device is practical, convenient and high in accuracy, can be used for quickly measuring the liquid level of engine oil in a non-contact manner, is low in interference of manual operation factors, converts different measured data of modal vibration into the liquid level height of the oil, and is high in precision and good in universality; an electric vibration exciter generates a discrete random pulse signal, and a vibration pickup module collects an acceleration signal and inputs the acceleration signal to a data acquisition module. The consistency and the accuracy of signal output are ensured. The comparison test is convenient to carry out and the performance of the researched system is improved. In addition, a conventional dipstick can be omitted in practical use, so that the structure of the engine is simplified, and the processing cost is reduced. The liquid level is displayed more intuitively by the LED display screen.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a schematic view of a level measuring device according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, a fluid level measuring device, such as an oil level sensor for an engine, is provided, as shown in fig. 1, and includes an excitation module 1, a fixing device 2, a vibration pickup module 3, a data acquisition module 4, a spectrum analysis module 5, a communication/control module 6, a display module 7, and an oil pan 8. The vibration excitation module 1 is used for applying vibration force to an oil pan 8 containing engine oil; the fixed module 2 is used for fixing the excitation module 1 outside the oil pan 8; the vibration pickup module 3 comprises an acceleration acquisition point arranged on the oil pan and is used for receiving an acceleration signal generated to the oil pan by the vibration excitation module; the data acquisition module 4 is respectively connected with the excitation module 1, the vibration pickup module 3 and the spectrum analysis module 5, and is used for receiving a vibration force signal generated by the excitation module 1 to the oil pan 8 and an acceleration signal generated by the vibration pickup module 3 and sending the signals to the spectrum analysis module 5; the frequency spectrum analysis module 5 carries out frequency spectrum analysis on the vibration force signal and the acceleration signal which are acquired by the data acquisition module 4 to obtain the vibration frequency of the corresponding part, preferably, the frequency spectrum analysis module 5 stores a pre-calibrated value aiming at the corresponding part of the oil pan at different liquid levels, so that the actual oil level is obtained by comparing the acquired vibration force signal and the acceleration signal with the pre-calibrated value; the communication/control module 6 is respectively connected with the frequency spectrum analysis module 5 and the display module 7; the communication/control module 6 transmits the actual oil level obtained by the frequency spectrum analysis module 5 to the display module 7.
According to a preferred embodiment of the invention, the excitation module 1 comprises an electrodynamic exciter for generating a discrete random pulse signal, a field effect transistor gate for transmitting the discrete random pulse signal to a power amplifier, the output of which drives a load of the electrodynamic exciter, and a power amplifier. Preferably, the display module 7 is an LCD display module. Further preferably, the vibration pickup module 3 is a piezoelectric acceleration sensor. According to the preferred embodiment of the present invention, the spectrum analysis module 5 integrates through a single chip program to perform spectrum analysis on the acquired vibration acceleration signal of the acceleration acquisition point. Further preferably, the spectrum analysis module 5 analyzes the vibration response amplitudes of the acceleration acquisition points in three directions in combination with the working conditions of the excited points so as to obtain the vibration frequency of the corresponding part of the oil pan where the acceleration acquisition points are located.
The liquid level measuring process of the liquid level measuring device of the invention is as follows: when the engine is static, the electric vibration exciter 1 generates a vibration force signal, such as a discrete random pulse signal, to the oil pan 8; receiving an acceleration signal generated by the vibration excitation module 1 to the oil pan 8 through the vibration pickup module 3; the data acquisition module 4 is used for acquiring a force signal generated by the vibration excitation module and an acceleration signal obtained by the vibration pickup module and sending the force signal and the acceleration signal to the spectrum analysis module 5; the force signals and the acceleration signals collected by the data collection module are subjected to spectrum analysis through a spectrum analysis module 5, for example, the force signals and the acceleration signals are integrated through a single chip microcomputer program, vibration response amplitudes in three directions are analyzed in combination with working conditions of excited points aiming at a plurality of acceleration collection points, vibration frequencies of corresponding parts are obtained, and the vibration frequencies are compared with a preset calibration value to obtain an actual liquid level; the obtained actual liquid level is transmitted to a display module 7 through a communication/control module 6; the display module 7 displays the actual liquid level; and if the liquid level is abnormal, taking an alarm measure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A fluid level measuring device, characterized in that the fluid level measuring device is an engine oil fluid level measuring device, comprising:
the vibration excitation module is used for applying vibration force to a container containing liquid to be detected;
the fixing module fixes the excitation module outside the container;
a vibration pickup module comprising an acceleration acquisition point disposed on the container for obtaining an acceleration signal generated by the excitation module on the container;
the data acquisition module is respectively connected with the excitation module, the vibration pickup module and the spectrum analysis module, and is used for receiving a force signal generated by the excitation module on the container and an acceleration signal obtained by the vibration pickup module and sending the force signal and the acceleration signal to the spectrum analysis module;
the container is an oil pan for containing engine oil;
the frequency spectrum analysis module is used for carrying out frequency spectrum analysis on the force signal and the acceleration signal acquired by the data acquisition module to obtain the vibration frequency of the corresponding part, and comparing the vibration frequency with the pre-calibrated value to obtain the actual liquid level, and carrying out vibration response amplitude analysis in three directions on the acceleration acquisition point to obtain the vibration frequency of the corresponding part where the acceleration acquisition point is located;
the communication/control module is connected with the spectrum analysis module;
and the communication/control module transmits the actual engine oil liquid level obtained by the frequency spectrum analysis module to the display module.
2. The level measuring device of claim 1, wherein the excitation module comprises an electrodynamic exciter for generating a discrete random pulse signal, a field effect transistor gate for transmitting the discrete random pulse signal to the power amplifier, and a power amplifier whose output drives a load of the electrodynamic exciter.
3. The fluid level measuring device of claim 1, wherein the display module is an LCD display module.
4. The fluid level measuring device of claim 1, wherein the vibration pickup module is a piezoelectric acceleration sensor.
5. The liquid level measuring device of claim 1, wherein the spectrum analysis module is integrated through a single-chip program to perform spectrum analysis on the collected vibration acceleration signals of the acceleration collection points.
6. An engine equipped with a level measuring device according to claim 1.
7. A liquid level measuring method implemented by the liquid level measuring apparatus according to any one of claims 1 to 6, characterized by comprising:
when a container for containing liquid to be detected is static, applying vibration force to the container through an excitation module;
acquiring an acceleration signal generated by the vibration excitation module on the container through a vibration pickup module;
acquiring a force signal generated by the vibration excitation module and an acceleration signal obtained by the vibration pickup module through a data acquisition module, and sending the force signal and the acceleration signal to a spectrum analysis module;
the force signal and the acceleration signal which are acquired by the data acquisition module are subjected to spectrum analysis through the spectrum analysis module, vibration response amplitudes in three directions are analyzed in combination with the working conditions of excited points aiming at a plurality of acceleration acquisition points to obtain the vibration frequency of a corresponding part, and the vibration frequency is compared with a preset calibration value to obtain an actual liquid level;
the obtained actual liquid level is transmitted to a display module through a communication/control module;
the display module displays the actual liquid level;
and if the liquid level is abnormal, taking an alarm measure.
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| CN201710953293.9A CN107894262B (en) | 2017-10-13 | 2017-10-13 | Liquid level measuring device and method, engine |
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| CN201710953293.9A CN107894262B (en) | 2017-10-13 | 2017-10-13 | Liquid level measuring device and method, engine |
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| CN107894262B true CN107894262B (en) | 2020-04-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112964439A (en) * | 2021-02-04 | 2021-06-15 | 季华实验室 | Terminal jitter simulation detection system and method and detection system of jitter suppression function |
| CN112922824A (en) * | 2021-03-09 | 2021-06-08 | 苏州旋凌科技有限公司 | Method for detecting oil level of compressor and corresponding component |
| CN113124962A (en) * | 2021-04-26 | 2021-07-16 | 铁岭铁光仪器仪表有限责任公司 | Liquid level measuring instrument and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58208626A (en) * | 1982-05-31 | 1983-12-05 | Kokusan Denki Co Ltd | Oil level detecting device for internal-combustion engine |
| JPH10102775A (en) * | 1996-10-01 | 1998-04-21 | Mitsubishi Heavy Ind Ltd | Damping device of multiple-stage boom |
| CN1701218A (en) * | 2003-02-26 | 2005-11-23 | 精工爱普生株式会社 | Consumables container that can measure the remaining amount of consumables |
| CN106382819A (en) * | 2016-08-30 | 2017-02-08 | 宁夏共享模具有限公司 | Feeding control system and method |
| CN106644449A (en) * | 2017-01-04 | 2017-05-10 | 大连海事大学 | A monitoring system and monitoring method for water and water stop conditions at the bottom of a ship lock miter gate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498240C (en) * | 2007-08-28 | 2009-06-10 | 东南大学 | Material position detecting method and device based on vibration signal of ball grinder rotating cylinder body |
| CN202471175U (en) * | 2012-02-28 | 2012-10-03 | 天地（常州）自动化股份有限公司 | Coal pile sensor |
| CN104897236A (en) * | 2015-06-08 | 2015-09-09 | 江苏省特种设备安全监督检验研究院张家港分院 | Vibration monitoring method of liquid level of vehicle-mounted liquefied natural gas tank |
| DE102015016775A1 (en) * | 2015-12-23 | 2017-06-29 | Audi Ag | Method for operating a sensor arrangement for a fluid tank of a motor vehicle and corresponding sensor arrangement |
| CN205977317U (en) * | 2016-08-18 | 2017-02-22 | 宝沃汽车（中国）有限公司 | Oil rule for engine and engine and car thereof |
-
2017
- 2017-10-13 CN CN201710953293.9A patent/CN107894262B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58208626A (en) * | 1982-05-31 | 1983-12-05 | Kokusan Denki Co Ltd | Oil level detecting device for internal-combustion engine |
| JPH10102775A (en) * | 1996-10-01 | 1998-04-21 | Mitsubishi Heavy Ind Ltd | Damping device of multiple-stage boom |
| CN1701218A (en) * | 2003-02-26 | 2005-11-23 | 精工爱普生株式会社 | Consumables container that can measure the remaining amount of consumables |
| CN106382819A (en) * | 2016-08-30 | 2017-02-08 | 宁夏共享模具有限公司 | Feeding control system and method |
| CN106644449A (en) * | 2017-01-04 | 2017-05-10 | 大连海事大学 | A monitoring system and monitoring method for water and water stop conditions at the bottom of a ship lock miter gate |
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