CN216005203U - Oiling machine monitoring device and oiling machine system - Google Patents
Oiling machine monitoring device and oiling machine system Download PDFInfo
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- CN216005203U CN216005203U CN202122510373.1U CN202122510373U CN216005203U CN 216005203 U CN216005203 U CN 216005203U CN 202122510373 U CN202122510373 U CN 202122510373U CN 216005203 U CN216005203 U CN 216005203U
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Abstract
The application relates to the technical field of oiling machine monitoring, in particular to an oiling machine monitoring device and an oiling machine system. The oiling machine monitoring device consists of a first microcontroller and a second microcontroller which are in communication connection, wherein the first microcontroller is used for acquiring the pulse number of the encoder and determining the oil output of the oiling machine according to the pulse number; the second microcontroller is used for acquiring liquid level information of the oil tank and determining the consumption of the oil according to the liquid level information; and the second microcontroller is also used for receiving the oil outlet amount sent by the first microcontroller and sending the consumption amount to the first microcontroller. The oiling machine monitoring device can acquire the oil outlet accuracy of the oiling machine according to the oil outlet quantity and the oil consumption of the oiling machine by acquiring the oil outlet quantity and the oil consumption of the oiling machine in real time so as to solve the technical problem that the error correction of the oiling machine is not timely.
Description
Technical Field
The application relates to the technical field of oiling machine monitoring, in particular to an oiling machine monitoring device and an oiling machine system.
Background
At present, a fuel dispenser of a gas station comprises a main controller, an encoder, a flow measurement converter, an explosion-proof device, a fuel gun and a nixie tube display tube. The flow measurement converter can convert the flow quantity of the oil product into a mechanical rotation signal and send the mechanical rotation signal to the encoder. The encoder may convert the mechanical rotation signal into an electrical pulse signal and send the electrical pulse signal to the master controller. The main controller can calculate the oil consumption according to the electric pulse signals and display the oil consumption each time through the nixie tube display tube.
However, the sensitivity of the flow measurement transducer deteriorates with time, resulting in a decrease in the accuracy of the mechanical rotation signal converted by the flow measurement transducer and an increase in the error in the amount of oil consumption displayed on the nixie tube display tube.
The calibration period of the existing oiling machine is one month, and error correction of the oiling machine is easily out of time along with the deterioration of the sensitivity of the flow measurement transducer.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide an oiling machine monitoring device and an oiling machine system to improve the untimely technical problem of above-mentioned oiling machine check-up.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, an embodiment of the present application provides a fuel dispenser monitoring device, where the device includes:
the system comprises a first microcontroller and a second microcontroller which are in communication connection; the first microcontroller is arranged on the oiling machine and comprises a first metering module; the second microcontroller is arranged in the machine room and comprises a second metering module;
the first microcontroller is connected with an encoder in the oiling machine, and is used for acquiring the pulse number of the encoder and determining the oil output of the oiling machine according to the pulse number through the first metering module;
the second microcontroller is connected with a liquid level metering module arranged on the oil tank, the liquid level metering module is used for acquiring liquid level information of the oil tank, the second microcontroller is used for acquiring the liquid level information acquired by the liquid level metering module, and the consumption of oil is determined according to the liquid level information through the second metering module;
the second microcontroller is also used for receiving the oil outlet amount sent by the first microcontroller and sending the consumption amount to the first microcontroller.
In the scheme, the oiling machine monitoring device acquires the pulse number of the encoder through the first microcontroller, and determines the oil output of the oiling machine according to the pulse number; acquiring liquid level information of the oil tank through a second microcontroller, and determining the consumption of the oil through the liquid level information; and the oil output information or the oil consumption information of the oiling machine is exchanged through the first microcontroller and the second microcontroller which are connected in a communication mode. The oiling machine monitoring device can determine the oil outlet accuracy of the oiling machine according to the oil outlet quantity and the oil consumption of the oiling machine by acquiring the oil outlet quantity and the oil consumption of the oiling machine in real time, so that the technical problem that the oil outlet accuracy of the oiling machine is not checked timely is solved, and the economic loss and the reputation loss caused by the oil outlet error of the oiling machine are further reduced.
Optionally, the second microcontroller further comprises a third metering module, and the third metering module is used for determining the oil outlet accuracy of the fuel dispenser according to the oil outlet amount and the consumption amount.
In the scheme, the oil outlet accuracy rate of the fuel dispenser can be determined according to the oil outlet quantity of the fuel dispenser and the oil consumption quantity by the third metering module in the second microcontroller. The technical problem that the oil outlet accuracy of the oiling machine is not timely verified is further solved by determining the oil outlet accuracy.
Optionally, the first microcontroller further comprises a fourth metering module, and the fourth metering module is used for determining the oil outlet accuracy rate of the fuel dispenser according to the oil outlet amount and the consumption amount.
In the scheme, the oil outlet accuracy rate of the fuel dispenser can be determined according to the oil outlet quantity of the fuel dispenser and the oil consumption quantity through the fourth metering module in the first microcontroller. The technical problem that the oil outlet accuracy of the oiling machine is not timely verified is further solved by determining the oil outlet accuracy.
Optionally, the apparatus further comprises: the third microcontroller is respectively communicated with the first microcontroller and the second microcontroller, and comprises a fifth metering module which is used for acquiring the oil outlet amount and the consumption amount and determining the oil outlet accuracy rate of the oiling machine according to the oil outlet amount and the consumption amount.
In the scheme, the oil outlet accuracy rate of the fuel dispenser can be determined according to the oil outlet quantity of the fuel dispenser and the oil consumption quantity by the fifth metering module in the third microcontroller. The technical problem that the oil outlet accuracy of the oiling machine is not timely verified is further solved by determining the oil outlet accuracy.
Optionally, the apparatus further comprises: the alarm module, the alarm module with the third metering module is connected, the alarm module is used for acquireing the rate of accuracy of producing oil, if the rate of accuracy of producing oil is not in predetermineeing the rate of accuracy threshold value within range, alarm module sends alarm signal.
In the scheme, the alarm module sends out an alarm signal when the oil outlet accuracy is not within the preset accuracy threshold range. Through setting up alarm module, after the precision rate that produces oil surpassed and predetermine precision rate threshold value scope, the maintenance personal of filling station can be quick acquire this alarm information to in time rectify the precision rate that produces oil of tanker aircraft for the maintenance personal of filling station.
Optionally, the apparatus further comprises: the power module is respectively connected with the first microcontroller and the second microcontroller, and the power module is used for providing a power supply for the first microcontroller and the second microcontroller.
Optionally, the apparatus further comprises: and the liquid level metering module is communicated with the second microcontroller, and is used for acquiring the liquid level information of the oil tank and sending the liquid level information to the second microcontroller.
In the above scheme, the liquid level metering module can acquire liquid level information of the oil tank and send the liquid level information of the oil tank to the second microcontroller, so that the second microcontroller can determine oil consumption information of the oil tank according to the liquid level information of the oil tank.
Optionally, the apparatus further comprises: a communication module for enabling communication between the first microcontroller and the second microcontroller.
Optionally, the communication module is an LoRa wireless communication module or a wired communication module.
In the above scheme, the communication between the first microcontroller and the second microcontroller is realized through the communication module, so that the first microcontroller or the second microcontroller can simultaneously acquire the oil consumption in the oil tank and the oil output of the oiling machine, and the oil output accuracy of the oiling machine is determined according to the oil output and the oil consumption.
In a second aspect, embodiments of the present application provide a fuel dispenser system, the system comprising:
the system comprises an oil tank, an oil dispenser and the oil dispenser monitoring device according to the first aspect, wherein the oil dispenser monitoring device is in communication connection with the oil tank and the oil dispenser respectively, and the oil dispenser monitoring device is used for acquiring liquid level information of the oil tank and pulse number of an encoder in the oil dispenser.
In the scheme, the oiling machine system obtains the pulse number of the encoder through the first microcontroller, and determines the oil output of the oiling machine according to the pulse number; acquiring liquid level information of the oil tank through a second microcontroller, and determining the consumption of the oil through the liquid level information; and the oil output information or the oil consumption information of the oiling machine is exchanged through the first microcontroller and the second microcontroller which are connected in a communication mode. The oiling machine system can determine the oil outlet accuracy of the oiling machine according to the oil outlet quantity and the oil consumption of the oiling machine by acquiring the oil outlet quantity and the oil consumption of the oiling machine in real time, and the technical problem that the oil outlet accuracy of the oiling machine is not checked timely is solved.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Figure 1 is a schematic diagram of a first fuel dispenser monitoring device provided in accordance with an embodiment of the present application;
figure 2 is a schematic diagram of a second fuel dispenser monitoring device provided in accordance with an embodiment of the present application;
figure 3 is a schematic illustration of a third fuel dispenser monitoring apparatus provided in accordance with an embodiment of the present application;
figure 4 is a schematic illustration of a fourth fuel dispenser monitoring apparatus provided in accordance with an embodiment of the present application;
figure 5 is a schematic diagram of a fuel dispenser system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The terms "first," "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily being construed as indicating or implying any actual such relationship or order between such entities or actions.
To the not enough that exists among the prior art, this application embodiment provides an tanker aircraft monitoring devices for carry out real-time supervision to the oil production precision of tanker aircraft, reduce economic loss and the loss of reputation that bring because the oil production error of tanker aircraft. Referring to fig. 1, fig. 1 is a schematic structural diagram of a fuel dispenser monitoring device according to an embodiment of the present application, where the fuel dispenser monitoring device includes:
a first microcontroller 101 and a second microcontroller 102 communicatively connected; the first microcontroller 101 is arranged on the fuel dispenser, and the first microcontroller 101 comprises a first metering module 1011; the second microcontroller 102 is disposed in the machine room, and the second microcontroller 102 includes a second metering module 1021;
the first microcontroller 101 is connected with the encoder 103 in the oiling machine, and the first microcontroller 101 is used for acquiring the pulse number of the encoder 103 and determining the oil output of the oiling machine according to the pulse number through the first metering module 1011;
the second microcontroller 102 is connected with a liquid level metering module 104 arranged on the oil tank, the liquid level metering module 104 is used for acquiring liquid level information of the oil tank, the second microcontroller 102 is used for acquiring the liquid level information acquired by the liquid level metering module 104, and the consumption of the oil is determined according to the liquid level information through a second metering module 1021;
the second microcontroller 102 is also configured to receive the fuel flow rate from the first microcontroller 101 and to send the consumption to the first microcontroller 101.
The first Microcontroller and the second Microcontroller are Micro Controller Units (MCUs), also called Single Chip microcomputers (Single Chip microcomputers), or Single chips, which properly reduce the frequency and specification of a Central Processing Unit (CPU), and integrate peripheral interfaces such as a memory, a counter, a USB, a/D conversion, UART, PLC, DMA, and even an LCD driving circuit on a Single Chip to form a Chip-level computer. An encoder refers to a device that compiles, converts, or otherwise converts signals or data into a form of signals that may be used for communication, transmission, and storage. The first microcontroller 101 and the second microcontroller 102 may be STM32 series chips or 51 single-chip computers or the like. The encoder 103 may be an incremental encoder or an absolute encoder, which is not particularly limited in this application.
Wherein, above-mentioned tanker aircraft includes: an encoder and a flow measurement transducer; the flow measurement converter is used for converting the flow quantity of the oil into a mechanical signal and sending the mechanical signal to an encoder, and the encoder is used for converting the mechanical signal into a pulse signal.
Wherein the second microcontroller 102 can receive the quantity of the dispensed oil sent by the first microcontroller 101, or the second microcontroller 102 can send the consumption quantity to the first microcontroller 101 and determine the precise rate of the dispensed oil from the fuel dispenser based on the quantity of the dispensed oil and the consumption quantity of the oil. The liquid level metering module may be implemented by a pressure sensor, such as a liquid level sensor or a water level sensor, for measuring the liquid level.
The first metering module 1011 may be a metering chip that performs the disclosed procedure of "calculating the fuel output of the fuel dispenser from the number of pulses". The second metering module 1021 may also be a metering chip that may perform the disclosed procedure "determine oil consumption from the level information of the oil tank". The "calculating the oil output of the oiling machine according to the pulse number" may specifically be: 30 mechanical signals are generated through the flow measurement transducer at every 0.5L of oilFor example, each mechanical signal is converted into a pulse signal, and the oil amount corresponding to each pulse signal is
The oil output of the oiling machine can be calculated through the pulse number. The "determining the oil consumption based on the oil level information of the oil tank" may specifically be: acquire the oil mass liquid level in the oil tank before and after refueling through the level gauge module, obtain the temperature of the oil in the oil tank through the thermometer, combine the internal parameter of oil tank, include: the water capacity, the internal shape of the oil tank and the like, and then the oil consumption is determined through a corresponding mathematical model.
As can be seen from the above, the fuel dispenser monitoring device provided in the embodiments of the present application includes a first microcontroller and a second microcontroller communicatively connected. The oiling machine monitoring device acquires the pulse number of the encoder through a first microcontroller and determines the oil output of the oiling machine according to the pulse number; acquiring liquid level information of the oil tank through a second microcontroller, and determining the consumption of the oil through the liquid level information; and the oil output information or the oil consumption information of the oiling machine is exchanged through the first microcontroller and the second microcontroller which are connected in a communication mode. The oiling machine monitoring device can determine the oil outlet accuracy of the oiling machine according to the oil outlet quantity and the oil consumption of the oiling machine by acquiring the oil outlet quantity and the oil consumption of the oiling machine in real time, and the technical problem that the oil outlet accuracy of the oiling machine is not checked timely is solved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second fuel dispenser monitoring device according to an embodiment of the present disclosure.
In some optional embodiments, the second microcontroller 102 further comprises a third metering module 1022, and the third metering module 1022 is configured to determine the precise rate of fuel delivery of the fuel dispenser based on the fuel delivery amount and the consumption amount.
The third metering module 1022 may be, for example, a metering chip, which may execute the disclosed procedure of determining the precise rate of fuel delivery from the fuel dispenser based on the amount of fuel delivered from the fuel dispenser and the amount of fuel consumed from the fuel tank. Wherein can be according to
And determining the oil production accuracy rate of the fuel dispenser, wherein S represents the oil production accuracy rate of the fuel dispenser, A represents the oil production amount, and B represents the consumption amount. Wherein, can also be according to
S represents the oil outlet accuracy of the oiling machine, A represents the consumption, and B represents the oil outlet quantity.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a third fuel dispenser monitoring device according to an embodiment of the present disclosure.
In some optional embodiments, the first microcontroller 101 further comprises a fourth metering module 1012, and the fourth metering module 1012 is configured to determine an oil production accuracy rate of the fuel dispenser based on the oil production amount and the consumption amount.
The fourth metering module 1012 may be, for example, a metering chip that performs the disclosed process of determining the precise rate of fuel delivery from the fuel dispenser based on the amount of fuel delivered by the fuel dispenser and the amount of fuel consumed from the fuel tank.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a fourth fuel dispenser monitoring device according to an embodiment of the present disclosure.
In some optional embodiments, the apparatus further comprises: a third microcontroller 105, the third microcontroller 105 being in communication with the first microcontroller 101 and the second microcontroller 102, respectively, the third microcontroller 105 including a fifth metering module 1051, the fifth metering module 1051 being configured to obtain the oil production amount and the consumption amount, and determine an oil production accuracy rate of the fuel dispenser according to the oil production amount and the consumption amount.
The third microcontroller may be an STM32 series chip or a 51 single chip microcomputer, and the like, which is not specifically limited in this application. The fifth metering module 1051 may be a metering chip that may perform the disclosed procedure of determining the precise rate of oil draw from the fuel dispenser based on the amount of oil drawn from the fuel dispenser and the amount of oil consumed from the tank.
In some optional embodiments, the apparatus further comprises: the alarm module 106, the alarm module 106 and the third metering module 1022 are connected, the alarm module 106 is configured to obtain the oil outlet accuracy, and if the oil outlet accuracy is not within the preset accuracy threshold range, the alarm module 106 sends an alarm signal.
The alarm module 106 may be an LED lamp or a buzzer. For example, the alarm module 106 is a buzzer, and when the oil outlet accuracy is within the preset accuracy threshold range, the buzzer does not generate a buzzer sound; when the oil outlet accuracy rate is not within the preset accuracy rate threshold range, the buzzer sends out a buzzing sound as an alarm prompt. Or, the alarm module 106 is an LED lamp, when the oil outlet accuracy is within the preset accuracy threshold range, the alarm module 106 prompts that the oil outlet accuracy is a green LED signal, and when the oil outlet accuracy is not within the preset accuracy threshold range, the alarm module 106 prompts that the oil outlet accuracy is a red LED signal. The preset accuracy threshold range may be ± 0.3% or ± 0.2%, or the absolute value of the oil yield accuracy is within 0.2% or 0.08%, that is, the preset accuracy threshold range may be determined according to actual conditions, which is not specifically limited in this application.
In some optional embodiments, the apparatus further comprises: the power module 107 is connected with the first microcontroller 101 and the second microcontroller 102 respectively, and the power module 107 is used for providing power supply for the first microcontroller 101 and the second microcontroller 102.
The power module 107 may be a storage battery or a lithium battery, and the power module 107 may also be directly connected to the commercial power.
In some alternative embodiments, the alarm module 106 is coupled to the power module 107.
The alarm module 106 connected to the power module 107 can send out a prompt of normal operation or abnormal operation when the power module operates normally or abnormally, wherein the prompt of normal operation is different from the prompt of abnormal operation; for example, the alarm module 106 is an LED lamp, the prompt that the power module 107 works normally may be a green LED signal, and the prompt that the power module 107 works abnormally may be a red LED signal; or, the LED lights are on when the power module 107 works normally, and the LED lights are off when the power module 107 works abnormally; or, the alarm module 106 is a buzzer, when the power module 107 works normally, the buzzer does not generate a buzzing sound, and when the power module 107 works abnormally, the buzzer generates the buzzing sound as a prompt.
In some optional embodiments, the apparatus further comprises: the liquid level metering module 104, the liquid level metering module 104 and the second microcontroller 102 are in communication, and the liquid level metering module 104 is configured to obtain liquid level information of the oil tank and send the liquid level information to the second microcontroller 102.
The liquid level measurement module 104 may be a liquid level meter, such as a magnetic suspension type liquid level meter or a pressure type liquid level meter, which is not limited in this application.
In some optional embodiments, the apparatus further comprises: a communication module 108, wherein the communication module 108 is used for realizing the communication between the first microcontroller 101 and the second microcontroller 102.
In some alternative embodiments, the communication module 108 may be a LoRa wireless communication module or a wired communication module.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a fuel dispenser system according to an embodiment of the present application, where the fuel dispenser system is used for monitoring the oil discharge accuracy of a fuel dispenser in real time, and the fuel dispenser system includes:
the tank 201, the fuel dispenser 202 and the fuel dispenser monitoring device 203 as described above in the first aspect, the fuel dispenser monitoring device 203 being in communication with the tank 201 and the fuel dispenser 202, respectively, the fuel dispenser monitoring device 203 being configured to obtain information about the level of the tank 201 and the number of pulses from the encoder within the fuel dispenser 202.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and system may be implemented in other ways. The above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and there may be other divisions in actual implementation, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A tanker aircraft monitoring device, comprising: the system comprises a first microcontroller and a second microcontroller which are in communication connection; the first microcontroller is arranged on the oiling machine and comprises a first metering module; the second microcontroller is arranged in the machine room and comprises a second metering module;
the first microcontroller is connected with an encoder in the oiling machine, and is used for acquiring the pulse number of the encoder and determining the oil output of the oiling machine according to the pulse number through the first metering module;
the second microcontroller is connected with a liquid level metering module arranged on the oil tank, the liquid level metering module is used for acquiring liquid level information of the oil tank, the second microcontroller is used for acquiring the liquid level information acquired by the liquid level metering module, and the consumption of oil is determined according to the liquid level information through the second metering module;
the second microcontroller is also used for receiving the oil outlet amount sent by the first microcontroller and sending the consumption amount to the first microcontroller.
2. The apparatus of claim 1 wherein said second microcontroller further comprises a third metering module for determining an accuracy rate of fuel delivery from said fuel dispenser based on said fuel delivery and said consumption.
3. The apparatus of claim 1 wherein said first microcontroller further comprises a fourth metering module for determining an accuracy rate of fuel delivery from said fuel dispenser based on said fuel delivery and said consumption.
4. The apparatus of claim 1, further comprising:
the third microcontroller is respectively communicated with the first microcontroller and the second microcontroller, and comprises a fifth metering module which is used for acquiring the oil outlet amount and the consumption amount and determining the oil outlet accuracy rate of the oiling machine according to the oil outlet amount and the consumption amount.
5. The apparatus of claim 2, further comprising:
the alarm module, the alarm module with the third metering module is connected, the alarm module is used for acquireing the rate of accuracy of producing oil, if the rate of accuracy of producing oil is not in predetermineeing the rate of accuracy threshold value within range, alarm module sends alarm signal.
6. The apparatus of claim 1, further comprising:
the power module is respectively connected with the first microcontroller and the second microcontroller, and the power module is used for providing a power supply for the first microcontroller and the second microcontroller.
7. The apparatus of claim 1, further comprising:
and the liquid level metering module is communicated with the second microcontroller, and is used for acquiring the liquid level information of the oil tank and sending the liquid level information to the second microcontroller.
8. The apparatus of claim 1, further comprising:
a communication module for enabling communication between the first microcontroller and the second microcontroller.
9. The apparatus of claim 8, wherein the communication module is a LoRa wireless communication module or a wired communication module.
10. A fuel dispenser system, said system comprising:
a fuel tank, a fuel dispenser, and a fuel dispenser monitoring device as claimed in any one of claims 1-9, said fuel dispenser monitoring device being in communication with said fuel tank and said fuel dispenser, respectively, said fuel dispenser monitoring device being adapted to obtain information on the level of said fuel tank and the number of pulses from an encoder within said fuel dispenser.
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| CN202122510373.1U CN216005203U (en) | 2021-10-18 | 2021-10-18 | Oiling machine monitoring device and oiling machine system |
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| CN202122510373.1U CN216005203U (en) | 2021-10-18 | 2021-10-18 | Oiling machine monitoring device and oiling machine system |
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