KR100337591B1 - A control method and control circuit of loading container for a freight car - Google Patents

Abstract

An object of the present invention is to set the amount of current to be detected in accordance with the amount of motor current at the last stage of opening and closing the blade in the step of setting the current amount of the current detection sensor to distinguish the current amount of the motor according to the rotation angle of the blade when opening and closing the cover This significantly reduces the load on each part of the motor, shaft and other control circuits.

In addition, the present invention is to be able to close and overlap the left and right cover to sequentially open and close it.

Description

A control method and control circuit of loading container for a freight car}

The present invention relates to a control circuit and a control method of a cargo box cover for a van.

In general, laws such as trucks, especially dump trucks, may cause stones and cargoes to be thrown away to contaminate roadsides and cause accidents of vehicles that follow.

Therefore, the cover may be of various types depending on the structure, but the structure of the general cover is formed on the upper side of both sides of the loading box to form a shaft (wing) is formed, respectively, the shaft is a motor (with a reducer) driven by a control circuit It is configured to open and close the wings by the operator to operate the control circuit connected to the driver's seat.

Before the cover of the prior art as shown in Figure 5, the cover is in close contact with the side of the loading box before using it as the shaft is rotated by the drive of the motor is also rotated over the loading box to cover the load.

As described above, the blade rotates about 270 ° to cover the loading box, and the driving force of the motor when the blade rotates up to 180 ° and rotates up to 270 ° occurs when the blade rotates. Done.

In other words, about 10A of current is needed for the motor during the initial start-up phase, and the rotation range of up to 180 ° after starting is the most load-bearing part of the motor, so it goes down in the rotation range of about 15A and 180 ° to 270 °. Because the phase is gravity, only a weak current of about 6A is required.

In addition, since the position of the cover is not visible in the vehicle, the operator cannot determine the moment of stopping the motor, and the motor is stopped by the current detection sensor.

That is, the current detection sensor detects the amount of current flowing in the motor at the last moment of opening and closing of the blade, and when the amount of current exceeds the set value, the relay is cut off to stop driving of the motor.

By the way, the conventional cover control circuit is simply set to 15A, which is the current required in the rotation range step up to 180 ° after the start of simply setting the amount of current to be set in the current detection sensor. This is because the motor cannot withstand the load if the current amount is set below the maximum value.

Therefore, if the current amount to be set in stopping the motor as the maximum current amount as in the conventional cover control circuit, the motor stops only when the load of the current flowing through the motor at the moment of closing the wing is applied to at least 15A. In other words, only a weak current of about 6A flows in the 180 ° to 270 ° rotation range, and the motor continues to transmit rotational force to the shaft and the blade until this current exceeds 15A and the relay is blocked by the current detection sensor. This is true even in the stage where the wings are opened and pressed close to the loading box.

Therefore, until the current of 6A exceeds 15A, the motor exerts rotational force on the shaft and vanes, which causes the shaft, vanes and reducers, and even the relays of the control circuit to be heavily loaded, causing the shaft to warp or frequently fail in the control circuit. It is the fact that is causing.

In addition, the conventional cover is operated by a button manually, and when the driver presses the button, the left and right cover starts to drive at the same time, so a lot of torque is required at the beginning, and the left and right cover is not configured to overlap the left and right cover It has a closed end such as dust blowing through the gap.

Therefore, an object of the present invention is to classify the amount of current of the motor that varies according to the rotation angle of the blade during opening and closing of the cover in each step and to set the current amount of the current detection sensor to detect the amount of current to match the motor current at the last step of opening and closing the blade By setting, the load on each part of the motor, shaft and other control circuits can be significantly reduced.

In addition, the present invention is to be able to close and overlap the left and right cover to sequentially open and close it.

1-schematic configuration diagram of the cargo compartment cover for the invention van.

2-a control circuit block diagram of the present invention.

3-a detailed circuit diagram of the present invention.

Figure 4-Flow chart for the control method of the cargo box cover for the invention van.

5-schematic configuration diagram of a loading box cover for a conventional van.

* Explanation of symbols for main parts of the drawings

1. Cargo loading box

2: Cargo cover (hereinafter referred to as cover) 2a: wing

3: motor 4: shaft

10: power stabilization circuit section 20: motor current detection section

30: microcomputer control unit 40: relay drive circuit unit

50: control unit display unit 60: input signal conversion unit

70: output control unit 70a: external terminal

SW: Power switch S1, S2, S3, S4, S5, S6, S7: Input switch

D1, D2, D3, D4, D5: Diode

R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11: Resistance

IC1: Microcomputer IC2, IC3: OP Amp IC

LS, RS: Current detection sensor REG: Constant voltage IC

TR1, TR2, TR3, TR4, TR5: Transistors T1, T2, T3: Terminal

LM, LC, RM, RC: Relay LL, RL, ERR: Lamp (LED)

The configuration of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a schematic block diagram of a van loading compartment cover, and FIG. 3 is a circuit diagram showing each part of FIG. 2 in more detail.

As shown in the drawing, the control circuit of the present invention inputs a power stabilization circuit unit 10 for supplying a stable power to a microcomputer, a motor current detector 20 for detecting a current flowing through the motor 3, and an operation signal. And an A / D converter and a timer for converting the analog power input values transmitted from the motor current detection unit 20 and the input signal conversion unit 60 to digital processing for comparison. Control device for displaying to the driver the state controlled by the microcomputer control unit 30, the relay drive circuit unit 40 for controlling the relay switch by the signal of the microcomputer control unit 30, and the microcomputer control unit 30 Power is supplied to the motor 3 for driving the left and right vanes connected to the terminals T1, T2, and T3 by the display unit 50 and the relays LC and RC driven by the relay driving circuit unit 40. To block It is composed of an output control unit 70.

The power stabilization circuit unit 10 includes a power switch SW, a diode D1 for protecting the power polarity when the control circuit is installed, a resistor R1 for protecting the constant voltage IC REG by stepping down the overvoltage for the vehicle and In addition, the constant voltage IC (REG) for stably supplying + 5V power to the microcomputer IC1 is connected in series.

The motor current detector 20 converts the current flowing through the current detection sensors LS and RS for detecting the current of the motor 3 into a micro voltage, and then amplifies and transmits the current to the analog input terminal of the microcomputer IC1. OP AmpIC (IC2).

The input signal conversion unit 60 is wing closing automatic switch (S1), wing opening automatic switch (S2), left and right wing manual closing and opening switch (S3, S4, S5, S6) and the drive of the wing in an emergency situation It consists of an emergency stop switch (S7) for stopping and the IC3 for using fewer ports of the microcomputer (IC1) by converting the switches to serial.

At this time, the wing closing automatic switch (S1), wing opening automatic switch (S2) is programmed in the microcomputer (IC1) so that the switch once input (used) is not restarted.

The microcomputer controller 30 includes a microcomputer IC1 having an A / D converter and a control program, and a capacitor and a crystal oscillator XT that oscillate and supply a clock signal to the microcomputer.

The microcomputer IC1 is a lamp LL, RL of the relays LM, LC, RM, RC and the control device display unit 50 by signals input through the motor current detector 20 and the input signal converter 60. , ERR) and the timer function based on the frequency generated by the crystal oscillator (XT) from the moment the operation signal is input. The maximum current can be set differently.

In other words, depending on the rotation angle of the blade when opening and closing the cover, it can be divided into a rotation section up to 180 ° after starting and a rotation section from 180 ° to 270 ° after which the time taken until the rotation section up to 180 ° after starting It takes about 14 to 15 seconds, and the rotation section from 180 ° to 270 ° takes about 7 to 8 seconds. Therefore, the total time to cover or open the wings is about 21 to 23 seconds.

Therefore, if the microcomputer IC1 takes about 14 to 15 seconds from the moment when the operation signal is input, the microcomputer IC1 recognizes that it passes the rotation section of 180 ° after starting, and recognizes the rotation section of 180 ° to 270 ° thereafter. Will be. The time will be recognized by the microcomputer as a case of opening and closing.

As a result, in setting the allowable current detection amount for stopping the motor in the microcomputer IC1, the driver can differentiate and set the allowable current detection amount for each section of the blade.

That is, from the moment the input signal is input, it is set to about 16A from about 14 to 15 seconds to operate without abnormality even at the maximum required current amount of 15A, and after 16 seconds, the wing is lowered by setting only about 7A of current to detect. It is configured so that the motor can be stopped immediately even with a slight load at the current amount of about 6A.

Therefore, like the conventional cover control circuit, it is not necessary to wait for the load to go up until the current amount of the motor reaches 15A.

The relay driving circuit unit 40 has a voltage distribution function for supplying the voltage from the microcomputer IC1 to the transistors TR1, TR2, TR3, TR4, and TR5, and resistors R2, R3, R4, R5, and R6. And the transistors TR1, TR2, TR3, TR4, TR5 for conducting when the input potential is high to drive the relays LM, LC, RM, RC and the buzzer BZ, and the relays LM, LC, RM, RC) It is composed of diodes (D2, D3, D4, D5) for absorbing and canceling back EMF generated at both ends of the coil.

Relays LM, LC, RM and RC driven by the relay drive circuit unit 40, motor power supply terminals T2 and T3 connected to the relays LC and RC, and also the relays LC and RC It consists of current detection sensor (LS, RS) connected to

At this time, the relay (LM, RM) is used for the main operation, the relay (LC, RC) is used for the motor forward and reverse direction switching.

The control device display unit 50 is composed of a lamp (LL, RL, ERR) for displaying the operating state and the standby state to the driver, it is easy to check the button to be pressed during night operation, thereby preventing malfunction It can be. The error lamp ERR is configured to turn on when the motor is disconnected.

In the control circuit of the present invention configured as described above, when the driver presses the power switch SW, 24V power is applied through the T1 terminal of the external terminal 7a, and the + 5V is applied to the microcomputer IC1 via the power stabilization circuit unit 10. The power supply, so the microcomputer (IC1) is initialized to determine whether the cover open mode or the cover closed mode.

Therefore, in the open mode, if you press the open switch again, the switch is not operated again and waits for the next operation signal. When the close switch is pressed, the right direction switching relay (RC) is driven among the relays for switching the motor forward / reverse direction. After about 0.5 seconds, the right main relay RM forms a contact and supplies power to the T2 terminal, so the right motor rotates. Therefore, the right wing is closed.

After the right turn relay RC is driven and the left turn relay LC is driven after about 0.5 seconds, the left main relay LM forms a contact after about 0.5 seconds, and thus the power is supplied to the T3 terminal. The motor will rotate. Therefore, the left wing is closed.

As a result, the right wing and the left wing are closed in sequence at a time interval, and when opened, the left wing is opened in the reverse order.

When the left and right wings completely cover the loading box, the blade is caught by the cargo or the motor 3 is loaded by the rod fixed to the shaft. At this time, when the current flowing through the motor exceeds the set value, the microcomputer (IC1) Turns off the right main relay RM and the left main relay LM of the relay controller 4 to block driving of the motor.

When the closing step is completed, the microcomputer IC1 turns on the lamp of the next operation button.

The opening operation is the reverse of the closing operation.

As described above, the present invention distinguishes the amount of current of the motor that varies depending on the rotational angle of the blade during opening and closing of the cover, but in setting the current amount of the current detection sensor, by setting the motor current amount at the final stage of opening and closing of the blade to about 7 A, the motor and shaft And other loads applied to each part of the control circuit can be significantly reduced.

In addition, the present invention is to have the effect of being able to close the left and right cover by overlapping them sequentially.

Claims (4)

A power stabilization circuit unit 10 for supplying stable power to the microcomputer, a motor current detector 20 for detecting a current flowing through the motor 3, an input signal converter 60 for inputting an operation signal, A crystal oscillator (XT) which oscillates with an A / D converter for converting and converting analog power input values transmitted from the motor current detector 20 and the input signal converter 60 into digital and supplies a clock signal to the microcomputer; The driver is provided with a microcomputer control unit 30 including a control program, a relay drive circuit unit 40 for controlling a relay switch by a signal of the microcomputer control unit 30, and a state controlled by the microcomputer control unit 30. Motor 3 for driving left and right vanes connected to terminals T1, T2, T3 by a control device display unit 50 for displaying and relays LC, RC driven by the relay drive circuit unit 40; Power on, B control circuit of the cargo compartment cover, characterized in that consisting of the output control unit 70 for blocking. In the loading box cover for trucks including a cover control circuit for driving a shaft by a motor and rotating the vane coupled to the shaft to set the detection current of the current detection sensor for controlling the motor to stop the blade. It determines the position of the wing according to the time required from the moment the operation signal is input, and sets the maximum allowable current amount of the motor according to the wing position so that the blade can be stopped without too much pressure on the motor. Control method of the cargo box cover for trucks, characterized in that. The method of claim 2, wherein in setting the maximum allowable current amount of the motor, the maximum allowable current amount is set to 16 A for 14 to 15 seconds after the operation signal is input, and the maximum allowable current amount is set to 7 A after 15 seconds. A control method for a cargo box cover for a van. In the cargo compartment cover for driving a shaft by a cover control circuit and a motor and coupled to the shaft and having a wing for covering the stack so that both ends overlap, the right wing and the left wing are sequentially closed at a time interval. Control method of a cargo compartment cover for a van, characterized in that configured to open in reverse order when opened.