KR20000061401A - A system for controlling and networking close-loop lubricant supplier - Google Patents

Abstract

PURPOSE: A control system and a network system are provided in which a plurality of closed circuit lubrication oil supply devices are connected to a single main controller through a serial peripheral interface communication system, so that the main controller can conveniently control each of the lubrication oil supply devices, to thereby allow a supply amount of lubrication oil to be measured with accuracy. CONSTITUTION: In a lubrication oil supply device having a gas generation unit(12) for operating a piston(11) by applying a pressure to a lubrication oil storage unit(10) so as to supply lubrication oil to a machine, a lubrication oil supply device control system comprises a piston position measuring sensor unit(13) for sensing the current position of the piston so as to measure the amount of the lubrication oil currently being supplied, a pressure sensor unit(14) for outputting a predetermined interrupt signal if a high pressure is sensed in the gas generation unit, and a control unit(15) for receiving a position measured data from the piston position measuring sensor unit, controlling a current flowing at the gas generation unit, receiving an interrupt signal from the pressure sensor unit, and checking whether an abnormal high pressure is generated. The control unit further comprises an alarm member for generating an alarm signal upon occurrence of abnormal high pressure or shortage of lubrication oil.

Description

System for controlling and networking close-loop lubricant supplier

The present invention relates to a closed loop lubricating oil supply device and a control system thereof, and more particularly, to a closed loop lubricating oil supply device and a control system thereof. Closed loop lubricant supply control and network by connecting the lubricant supply device to a single main controller via SPI (Serial Peripheral Interface) communication system, which enables the main controller to conveniently perform operation commands and condition monitoring of each lubricant supply device. It's about the system.

In general, the lubricating oil supply device is intended to continuously supply the lubricating oil to the lubrication portion of the operating machine, the operation portion is operated smoothly to prevent wear and damage.

For this purpose, the existing lubricating oil supply device mostly fills the lubricating oil in the cylinder and uses the gas pressure to push the piston located opposite the lubricating oil inlet.

At this time, the amount of gas generated is changed corresponding to the current value applied to the gas generating unit, the current value is determined by the following equation.

i = V / (R + R _S )

V: voltage of power supply

R: Internal resistance of gas generating part

i: current

R _S : External resistance

The commercially available lubricant supply device obtains the relationship between the amount of current and the amount of lubricant supply through continuous experiments, so that the lubricant is supplied for a desired period of time.

This is a method of selecting a switch to connect an external resistor corresponding to a desired operation period (for example, 1 month, 3 months, 6 months, etc.) among various resistance values.

That is, as shown in FIG. 1, when the external resistance according to the supply amount desired by the user is selected, the current value calculated by the above formula is provided to the gas generating unit, and accordingly gas is generated from the gas generating unit to generate a predetermined pressure. The piston is activated.

Thus, by the operation of the piston the lubricant is provided to the corresponding part of the operating machine through the inlet.

However, the problems of the prior art are that the internal voltage (V) of the battery used as a power source continuously decreases and the internal resistance value (R) of the gas generator is changed as the use time elapses. As the temperature and humidity of the air change greatly, it can be different from the user's desired operation period.

In addition, there is no gas abnormal pressure alarm function or battery low voltage alarm due to malfunction, so a robust controller that is not affected by changes in the surrounding environment and internal characteristics due to increase in use time is required.

On the other hand, in the case of a large machine, it is difficult to check the lubricating oil consumption, abnormal state, etc. of a plurality of lubricating oil supply devices installed in various parts, and there are many difficulties in operating / stopping each supply device individually. In addition, this is a problem that occurs when checking whether there is an abnormality in the supply device installed in a large machine that is not easily accessible.

To solve this problem, there is a method of configuring a network by connecting each supply device to a single central controller as shown in FIG. 2, but using the conventional one-to-one network connection method, an increase in wiring amount and an increase in the number of connection ports of the central controller are provided. The problem of cost increase occurs. Therefore, a simple and reliable new network connection method is required to solve this problem.

In order to solve the above problems, a plurality of closed loop lubricating oil supply device having a sub-controller for controlling the user to supply the correct flow rate for a desired period by measuring the supply amount of lubricating oil to one main controller in the SPI communication method It is an object of the present invention to provide a closed loop lubricant supply control and network system that enables the main controller to conveniently perform operation commands and condition monitoring functions of the respective lubricant supply devices.

As a technical idea for achieving the object of the present invention, in the lubricating oil supply device having a gas generating unit for applying a predetermined pressure to the lubricating oil reservoir in which a predetermined amount of lubricating oil is stored so as to supply lubricating oil to the lubricating part of the operating machine. A piston position sensor unit for detecting a current position of the piston for measuring a flow rate of the lubricating oil currently supplied, a pressure sensor unit for outputting a predetermined interrupt signal when a high pressure of a predetermined pressure is detected in the gas generating unit; A control means for controlling the current flowing through the gas generating part by receiving the position measurement data of the piston sensed by the piston position measuring sensor part and checking whether an abnormal high pressure is generated by receiving a predetermined interrupt signal from the pressure sensor part. and,

The control means controls the current flowing in the gas generating unit to control the set supply flow rate and the current supply flow rate and the alarm means for generating a predetermined alarm signal when abnormal gas pressure, lubricating oil shortage, program abnormal operation occurs in the gas generating unit Including inventions are presented.

1 is a reference diagram showing a conventional open circuit lubricant supply control process.

2 is a system block diagram showing a conventional main controller and a plurality of sub-controller connection method.

Figure 3 is a side view showing a closed loop lubricating oil supply device according to the present invention.

Figure 4 is a reference diagram showing a closed loop lubricating oil supply control process according to the present invention.

5 is a reference diagram for explaining the relationship between the position of the piston and the lubricating oil flow rate.

6 is a reference diagram showing signals used in SPI communication according to the present invention.

7 is a system block diagram illustrating a method of connecting a main controller and a plurality of sub-controllers according to the present invention.

8 is a system block diagram illustrating an example of FIG. 7 in more detail.

<Description of the code | symbol about the principal part of drawing>

10: lubricant storage unit 11: piston

12: gas generating unit 13: piston position measuring sensor

14: pressure sensor unit 15: control means

16: alarm means 20: lubricating oil supply device

21: sub-controller 22: main controller

23 lubricant discharge port 24 electrode

25 LCD Display 26 Buzzer

27: LED lamp for alarm

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment according to the present invention will be described.

Figure 3 is a side view showing a closed loop lubricating oil supply device according to the present invention.

Figure 4 is a reference diagram showing a closed loop lubricating oil supply control process according to the present invention.

5 is a reference diagram for explaining the relationship between the position of the piston and the lubricating oil flow rate.

6 is a reference diagram showing signals used in SPI communication according to the present invention.

7 is a system block diagram illustrating a method of connecting a main controller and a plurality of sub-controllers according to the present invention.

8 is a system block diagram illustrating an example of FIG. 7 in more detail.

Referring to FIGS. 3, 4, 5, 6, and 7, the present invention provides a predetermined pressure to the lubricating oil storage unit 10 in which a predetermined amount of lubricating oil is stored so as to supply lubricating oil to the lubricating part of the operating machine. In the lubricating oil supply device having a gas generating unit 12 to apply the piston 11,

Piston position measuring sensor 13 for detecting the current position of the piston 11 for measuring the flow rate of the lubricating oil currently supplied, and a predetermined interrupt signal when a high pressure of a predetermined pressure or more is detected in the gas generating unit 12 The pressure sensor unit 14 for outputting the position and the position measurement data of the piston 11 sensed from the piston position sensor unit 13 is applied to control the current flowing in the gas generating unit 12 and the pressure sensor The control unit 15 which checks whether an abnormal high pressure is generated by receiving a predetermined interrupt signal from the unit 14 and generates a predetermined alarm signal when an abnormal high pressure, lack of lubricating oil, or program abnormal operation occurs in the gas generating unit 12. It consists of an alarm means (16).

In addition, the present invention is a lubricating oil supply control system in which the sub-controller 21 provided in each of the plurality of lubricating oil supply device 20 is connected one-to-one with one main controller 22,

After receiving the transmission signal and the synchronization signal having the ID information assigned from the main controller 22 determines whether the current amount of residual lubricant, abnormal high pressure and the sub-controller is normal operation, a plurality of plurality of information to be transmitted back to the main controller 22 The sub-controller 21 is connected to the SPI (Serial Peripheral Interface) communication method.

In addition, the sub-controller 21 compares the current flow rate calculated by measuring the flow rate set by the user and the position of the piston 11 and then the current flowing through the gas generator 12 so that the difference is '0'. Will be controlled.

In addition, the sub-controller 21 normally operates all of the line drivers connected to the reception signal RXD in a disabled state, and when the ID information is transmitted from the main controller, the next synchronization signal is received. At this time, the line driver is enabled.

In addition, the sub-controller 21 controls the lubrication flow rate during normal operation, and when a predetermined synchronization signal is input from the main controller 22, the sub-controller 21 processes the interrupt signal.

Referring to the operation of the present invention configured as described above are as follows.

First, the closed loop lubricating oil supply device 20 according to the present invention can be supplied to the lubrication portion of the operating machine in a precise flow rate set in advance for a user desired period (for example, 1 month, 3 months, 6 months, etc.). In order to ensure that the existing lubricating oil supply device in addition to some additional configuration.

That is, the piston 11 for applying a predetermined pressure so that the lubricant oil storage unit 10, a predetermined amount of lubricant oil is stored, and the lubricant oil stored in the lubricant oil storage unit 10 is supplied to the oil supply site of the operating machine through the discharge port 23; In addition, in addition to the lubricant supply device having a gel-type (Gel-type) gas generating unit 12 is accommodated the electrolyte that generates gas when the current is applied to the electrode 24 to operate the piston 11, A piston position sensor unit 13 for detecting a current position of the piston 11, a pressure sensor unit 14 for outputting a predetermined interrupt signal when a high pressure of a predetermined pressure or more is detected by the gas generator 12; By receiving the position measurement data of the piston 11 sensed by the piston position sensor 13 to control the current flowing through the gas generating unit 12 while receiving a predetermined interrupt signal from the pressure sensor unit 14 Currently licensed The control means 15 for checking whether or not the abnormal high pressure is generated, and the alarm means 16 for generating a predetermined alarm signal under the control of the control means 15 is generated.

At this time, the alarm means 16 is not only when abnormal high pressure is generated in each of the lubricant supply device 20 as described above, but also when an alarm such as lack of lubricant, lack of battery power, program abnormal operation, etc. By using the 27, the predetermined light can be flickered or an alarm sound can be generated through the buzzer 26. In addition, the LCD display 25 may display the unique ID number and the abnormality of the corresponding lubricant supply device 20 having a problem on the screen.

In addition, the control means 15 outputs a new control command by comparing the current lubricating oil amount measured for the closed loop control with the lubricating oil amount set by the user, as shown in FIG. The state variables in controlling the flow rate are )

This method for measuring the flow rate is made possible by measuring the displacement of the piston 11 rather than using a flow meter. That is, when the internal diameter of the cylindrical lubricating oil storage unit 10 is represented as D, and the position of the piston 11 is indicated by L as shown in FIG. 5, the relationship between the flow rate and these displacements can be expressed as follows. Can be.

= (π / 4) D ² × (d / dt) L

That is, the flow rate is proportional to the position of the piston 11 changing per unit time. Accordingly, a rotary potentiometer is used for the positioning of the piston 11.

The control means 15 compares the current flow rate calculated by measuring the flow rate desired by the user and the position of the piston 11 to control the current flowing in the gas generating unit 12 such that the difference is '0'.

In addition, when a current is continuously applied to the electrode 24 of the gas generator 12 while the lubricating oil inlet 23 of the closed loop lubricating oil supply device 20 is blocked, gas continues to flow in the gel-type electrolyte. The risk of explosion increases. Due to such a risk, the pressure sensor unit 14 is provided at a predetermined upper portion of the gas generator 12 to sense the pressure in the current gas generator 12.

At this time, when a high pressure of a predetermined pressure or more is sensed by the pressure sensor unit 14, the pressure sensor unit 14 sends a predetermined detection signal to the control unit 15 to generate an interrupt signal, thereby generating gas. The power flowing to the unit 12 is cut off and gas generation of the closed loop lubricating oil supply device 20 is stopped.

In addition, the sub-controller 21 receiving the abnormal high-pressure detection signal from the pressure sensor unit 14 transmits a predetermined signal to the main controller 22, and accordingly, the main controller 22 is a warning LED lamp 27 ), The buzzer 26 and the alarm means 16 of the LCD display 25 to alert the closed circuit lubricant supply device 20 that problems such as abnormal high pressure, lack of lubricant, lack of power, abnormal program operation, etc. have occurred. do.

On the other hand, the plurality of lubricating oil supply device 20 conventionally has a structure that is connected to the main controller 22 in one-to-one, as shown in Figure 2, according to the closed-loop lubricating oil supply control system according to the present invention, as shown in FIG. The sub-controller 21 provided in each closed loop lubricating oil supply device 20 is connected to one main controller 22 by SPI (Serial Peripheral Interface) communication method.

For reference, the SPI communication method includes one main controller 22 and a plurality of sub-controllers 21 as shown in FIGS. 7 and 8, and the main controller 22 is shown in FIG. 6. As described above, the transmission signal TXD including the synchronization signal Clock determined by the communication protocol and the unique ID information of each sub controller 21 is transmitted to the sub controller 21.

In addition, the sub-controller 21 receives the synchronization signal (Clock) and the transmission signal (TXD) from the main controller 22, and at the same time again receives the received signal (RXD) to the main controller 22 in accordance with the synchronization signal Will be sent.

That is, the process of sending the signal of the sub-controller 21 to the main controller 22 through the reception signal RXD line is determined according to the synchronization signal of the main controller 22. According to the control system according to the present invention, The master controller 22 transmits one synchronization signal, so that the plurality of sub-controllers 21 all receive the same synchronization signal and transmission signal, but only one sub-controller 21 actually controls the signal. You need to send it to, so you need a special way to do it.

To this end, a unique ID number is assigned to each subcontroller 21, and an enable / disable function is performed to operate a line driver connected to the reception signal RXD of the subcontroller 21. Will be used.

That is, all of the line drivers connected to the reception signal RXD of the sub-controller 21 normally operate in a disabled state, and when their own ID numbers are transmitted from the main controller 22, The line driver is enabled when the synchronous signal is received.

As described above, when a line driver of the sub-controller 21 is enabled, information for confirming the state of the current closed-loop lubricating oil supply device can be sent to the main controller 22.

This method is used when checking the state of the sub-controller 21, which is provided with a plurality in the main controller 22, the status check content is the current amount of lubricant. Abnormal high pressure and normal operation of controller. When the main controller 22 commands a predetermined sub-controller 21, it first transmits a unique ID number and then transmits command information for the sub-controller 21 with the next synchronization signal.

The command transmission signal includes a flow rate setting and a temporary stop of the individual lubricating oil supply device.

As described above, when the synchronization signal, the transmission signal, and the reception signal are transmitted through the SPI communication method, a differential signal type is used during signal transmission in order to prevent voltage drop loss even during long distance transmission and to block noise signals from the outside. I'm using.

As described above, the plurality of sub-controllers 21 operates the closed-circuit lubricating oil supply device 20 to control the accurate amount of lubricating oil supply. When the synchronization signal is input from the main controller 22, the sub-controller 21 processes the interrupt signal as described above. By transmitting the received signal back to the main controller 22, it is possible to ensure the safety of the communication.

As can be seen from the above description, the present invention applies a predetermined pressure to the lubricating oil storage unit 10 in which a predetermined amount of lubricating oil is stored so as to supply lubricating oil to the oiling part of the operating machine. A lubricating oil supply device having a (12), comprising: a piston position sensor (13) for sensing a current position of the piston (13) for measuring a flow rate of a lubricating oil supplied at present; When a high pressure of a predetermined pressure or more is detected, the gas generating unit receives the pressure sensor unit 14 for outputting a predetermined interrupt signal and the position measurement data of the piston 11 detected from the piston position measuring sensor unit 13. The control means 15 for controlling the current flowing through the 12 and the generation of abnormal high voltage by receiving a predetermined interrupt signal from the pressure sensor unit 14 and the control means 15 Composed of at least a high pressure, the lubricating oil shortage and abnormal operation program in case the alarm means (16) for generating a predetermined warning signal in eoha and

In addition, in the lubricating oil supply control system in which a plurality of lubricating oil supply devices 20 are connected to one main controller 22, a transmission signal and a synchronizing signal having unique ID information allocated from the main controller 22 are supplied. By connecting the plurality of sub-controllers 21 to the main controller 22 by the SPI (Serial Peripheral Interface) communication method after receiving the current level of lubricant, abnormal high pressure, and whether the sub-controller is normally operated.

The network can be simplified, and the closed-loop control method can be used to more accurately measure the amount of lubricating oil, compared to the conventional open-loop control method of the lubricating oil supply device, thereby providing accurate flow rate for the desired period of time. .

In addition, abnormal conditions such as pressure abnormality of each lubricating oil supply device, insufficient lubricating oil remaining amount and low battery voltage can be grasped by the main controller 22, and each lubricating oil supply device can be individually started or stopped.

In addition, when additional installation of the lubricating oil supply device is required, it can be connected to any part of the network and used to ensure excellent expandability.

Claims (4)

In the lubricating oil supply device having a gas generating unit for applying a predetermined pressure to the lubricating oil reservoir in which a predetermined amount of lubricating oil is stored so as to supply the lubricating oil to the lubricating part of the operating machine, A piston position sensor unit for detecting a current position of the piston for measuring a flow rate of currently supplied lubricant oil, A pressure sensor unit for outputting a predetermined interrupt signal when a high pressure of a predetermined pressure or more is detected in the gas generating unit; A control means for controlling the current flowing through the gas generating part by receiving the position measurement data of the piston sensed by the piston position measuring sensor part and checking whether an abnormal high pressure is generated by receiving a predetermined interrupt signal from the pressure sensor part. and, The control means controls the current flowing in the gas generating unit to control the set supply flow rate and the current supply flow rate and the alarm means for generating a predetermined alarm signal when abnormal gas pressure, lubricating oil shortage, program abnormal operation occurs in the gas generating unit Closed loop lubricant supply device control system comprising a. In the lubricating oil supply device control system in which a plurality of sub-controller of the lubricating oil supply device provided is connected to one main controller, A plurality of sub-controllers for receiving the transmission signal and the synchronization signal having the ID information allocated from the main controller to determine the current lubricant level, abnormal high pressure and normal operation of the controller and to transmit the determined information back to the main controller are serial peripherals. Interface) Closed loop lubricating oil supply device control system characterized in that connected to the communication method. The method of claim 2, wherein the sub-controller compares the current flow rate calculated by measuring the position of the piston and the flow rate set by the user and controls the current flowing in the gas generating unit so that the difference is '0' Closed loop lubricant supply control system. The apparatus of claim 2, wherein the sub-controller normally operates in a state where all of the receiving side line drivers are disabled, and when their ID information is transmitted from the main controller, when the next synchronization signal comes in, the line driver ( Network system, characterized in that the Enable (Line Driver).