An interface control circuit for a plating thickness detection window

Abstract

The application discloses an interface control circuit of a plating layer thickness detection window and relates to the technical field of plating layer detection. The interface control circuit comprises a switch and a motor. The first input end of the switch is connected with a power supply, and the output end of the switch is connected with the control end of the motor. The motor is used for controlling the opening or closing of the window. A thickness detection sensor is arranged in the window. When the window is opened, the thickness detection sensor detects the plating layer thickness. When the window is closed, the thickness detection sensor stops detecting the plating layer thickness. When the window is just opened, the opening speed of the window runs at a high speed. When the opening of the window reaches a set opening degree, the opening speed of the window runs at a low speed, so that the inertia is prevented from being too large to cause the detection equipment to be damaged.

Description

Technical Field

[0001] This invention relates to the field of coating inspection technology, and in particular to an interface control circuit for a coating thickness detection window. Background Technology

[0002] In the process of inspecting the zinc coating thickness of cold-rolled strip steel, it is necessary to feed back the relevant status signals of the inspection equipment to the control system. The control system then needs to send control commands to the field actuators. Therefore, an intermediate interface device needs to be added between the inspection equipment and the control system to ensure the real-time and stable transmission of feedback and command signals, ultimately ensuring the stable operation of the entire inspection system. The function of this interface circuit is to act as an intermediate conversion and transmission device to achieve real-time and stable signal transmission. The operational stability of this interface circuit is directly related to the effectiveness of the transmission of feedback and command signals, which in turn affects whether the inspection equipment can perform normal inspections. Therefore, as a key component of the inspection equipment, this interface circuit has high requirements for the reliability and stability of its circuit design. Summary of the Invention

[0003] The purpose of this invention is to provide an interface control circuit for a coating thickness detection window, which features a simple hardware design, strong anti-interference performance, circuit protection, and high signal transmission reliability.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] One aspect of this invention provides an interface control circuit for a coating thickness detection window. The interface control circuit includes: a switch and a motor; a first input terminal of the switch is connected to a power supply, and an output terminal of the switch is connected to a control terminal of the motor to control the motor's operation; the motor controls the opening or closing of the window; a thickness detection sensor is disposed within the window; when the window is open, the thickness detection sensor detects the coating thickness; when the window is closed, the thickness detection sensor stops detecting the coating thickness; a shunt circuit, one end of which is connected to a power supply, and the other end of which is connected to a second input terminal of the switch; and a comparator, the first comparison input terminal of which is connected to a reference voltage, and the output terminal of the comparator is connected to the... The switch has a control terminal and an interface. One side of the interface is used to connect to the controller interface, and the first output terminal on the other side of the interface is connected to the positive terminal of the motor, while the negative terminal of the motor is grounded. The second output terminal on the other side of the interface is connected to the second comparison input terminal of the comparator. When the window is open, the second comparison input terminal of the comparator receives a low level, and the comparator controls the first input terminal of the switch to be electrically connected to the control terminal of the motor. When the window is opened to a set degree, the second comparison input terminal of the comparator receives a high level, and the comparator controls the second input terminal of the switch to be electrically connected to the control terminal of the motor. When the window is closed, both the first and second input terminals of the switch stop receiving power, and the window elastically returns to the closed state.

[0006] In some embodiments, the interface control circuit further includes a voltage divider circuit, which includes a first resistor and a second resistor. One end of the first resistor is connected to a power supply, and the other end of the first resistor is connected to one end of the second resistor and the first comparison input terminal of the comparator. The other end of the second resistor is grounded.

[0007] In some embodiments, the interface control circuit further includes a filtering circuit, which includes a third resistor and a first capacitor. One end of the third resistor is connected to a second output terminal on the other side of the interface, and the other end of the third resistor is connected to one end of the first capacitor and a second comparison input terminal of the comparator. The other end of the first capacitor is grounded.

[0008] In some embodiments, the interface control circuit further includes a second capacitor, one end of which is connected to the output of the comparator, and the other end of which is grounded.

[0009] In some embodiments, the interface control circuit further includes a first diode, the anode of which is connected to the comparator, the other end of the first capacitor, and the other end of the second capacitor, and the cathode of the first diode is grounded.

[0010] In some embodiments, the interface control circuit further includes a fourth resistor, one end of which is grounded and the other end of which is connected to the second comparison input of the comparator.

[0011] In some embodiments, the switch includes a relay and a second diode. One end of the control terminal of the relay is connected to the negative terminal of the second diode and the power input terminal of the comparator. Both the control terminal of the relay and the power input terminal of the comparator are connected to a power source. The other end of the control terminal of the relay is connected to the positive terminal of the second diode and the output terminal of the comparator. The first controlled end of the relay is connected to the power source. The second controlled end of the relay is connected to the control terminal of the motor. The third controlled end of the relay is connected to the shunt circuit.

[0012] In some embodiments, the shunt circuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and a third capacitor. One end of the fifth resistor is connected to one end of the sixth resistor, one end of the seventh resistor, one end of the third capacitor, and the controlled third terminal of the relay. The other end of the fifth resistor is connected to one end of the eighth resistor, the other end of the sixth resistor is connected to one end of the ninth resistor, the other end of the seventh resistor is connected to one end of the tenth resistor, and the other end of the eighth resistor is connected to the other ends of the ninth resistor, the other end of the tenth resistor, the other end of the third capacitor, and the power supply.

[0013] In some embodiments, the fourth and fifth controlled terminals of the relay are respectively connected to two feedforward input terminals on the other side of the interface.

[0014] In some embodiments, the interface control circuit further includes a third diode and an eleventh resistor, the positive terminal of the third diode being grounded through the eleventh resistor, and the negative terminal of the third diode being connected to the controlled terminal of the relay and the control terminal of the motor.

[0015] An interface control circuit for a coating thickness detection window according to an embodiment of the present invention has at least the following beneficial effects: The present invention achieves effective control command issuance, ensuring stable and reliable operation of the equipment. When the window is first opened, the opening speed is high; when the window reaches the set opening degree, the opening speed is low to prevent excessive inertia from damaging the detection equipment. The present invention improves the signal transmission efficiency between devices and the reliability and timeliness of hardware connections. By adding a first diode, a second diode, and a third diode, the present invention improves the stability of the interface board, eliminates the potential for abnormal damage to the hardware devices connected to the interface board, and effectively reduces equipment maintenance costs. Based on recent experience of needing to return two sets of detection equipment for repair annually, with each set costing nearly 100,000 yuan, the present invention can directly reduce repair costs by 10 * 2 = 200,000 yuan annually.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the interface control circuit according to an embodiment. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0023] The technical solutions of the embodiments of this application are briefly described below:

[0024] According to some embodiments, such as Figure 1 As shown, an interface control circuit for a coating thickness detection window is provided, the interface control circuit comprising:

[0025] A switch and a motor are provided. The first input terminal of the switch is connected to a power supply, and the output terminal of the switch is connected to the control terminal of the motor to control the operation of the motor. The motor is used to control the opening or closing of a window. A thickness detection sensor is provided inside the window. When the window is open, the thickness detection sensor detects the coating thickness. When the window is closed, the thickness detection sensor stops detecting the coating thickness.

[0026] A shunt circuit is provided, one end of which is connected to a power source, and the other end of which is connected to the second input terminal of the switch.

[0027] Comparator U, the first comparison input terminal of comparator U is connected to a reference voltage, and the output terminal of comparator U is connected to the control terminal of the switch;

[0028] Interface CN, one side of which is used to connect to controller interface CN, the first output terminal of the other side of interface CN is connected to the positive terminal of the motor, the negative terminal of the motor is grounded, and the second output terminal of the other side of interface CN is connected to the second comparison input terminal of comparator U;

[0029] When the window is open, the second comparison input terminal of the comparator U receives a low level, and the comparator U controls the first input terminal of the switch to be electrically connected to the control terminal of the motor. When the window is opened to a set degree, the second comparison input terminal of the comparator U receives a high level, and the comparator U controls the second input terminal of the switch to be electrically connected to the control terminal of the motor.

[0030] Based on the above embodiment, when the controller initially initiates the coating thickness detection, the second comparison input terminal of comparator U receives a low level, and the output terminal of comparator U outputs a high level. The control terminal of the switch-controlled motor is electrically connected to the first input terminal of the switch, and the motor control terminal receives a high current and voltage control signal, causing the window to open at high speed. When the window opens to the set opening degree, the controller receives a signal indicating that the window has opened to the set opening degree. The controller inputs a high level to the second comparison input terminal of comparator U through interface CN. The second comparison input terminal of comparator U receives a high level, and the output terminal of comparator U outputs a low level. The control terminal of the switch-controlled motor is electrically connected to the second input terminal of the switch, and the motor control terminal is connected to the power supply through a shunt circuit. The motor operates at low speed, causing the window to open at low speed. When it is necessary to close the window, both the first and second input terminals of the switch are de-energized, and the window returns to the closed state by the elastic mechanism.

[0031] Furthermore, it operates at high speed when the window is just opening and at low speed when the window is almost fully open. This not only increases the window opening speed but also avoids the detection equipment being damaged due to excessive window inertia.

[0032] Furthermore, one end of the elastic mechanism is fixed to the detection equipment, and the other end is connected to a window. The thickness detection sensor inside the window is electrically connected to the detection equipment. When the elastic mechanism elastically returns to its original state, the window is closed. Opening the window causes the elastic mechanism to elastically deform.

[0033] In this circuit, the first comparison input terminal of comparator U is the non-inverting input terminal of comparator U, and the second comparison input terminal of comparator U is the inverting input terminal of comparator U.

[0034] The following is in conjunction with the appendix to this instruction manual. Figure 1 The preferred embodiments of this disclosure will be further described in detail below.

[0035] According to some embodiments, the interface control circuit further includes a voltage divider circuit, which includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to a power supply, and the other end of the first resistor R1 is connected to one end of the second resistor R2 and the first comparison input terminal of the comparator U. The other end of the second resistor R2 is grounded.

[0036] Based on the above embodiments, the non-inverting input of comparator U is stepped down by a first resistor R1 and a second resistor R2 to obtain a reference voltage. The value of the reference voltage can be changed by altering the resistance values ​​of the first resistor R1 and the second resistor R2. The value of the reference voltage can be set according to actual needs. In some embodiments, the reference voltage is set to 19.4V, the power supply is 24V, the resistance of the first resistor R1 is 4.7KΩ, and the resistance of the second resistor R2 is 20KΩ.

[0037] According to some embodiments, the interface control circuit further includes a filtering circuit, which includes a third resistor R3 and a first capacitor C1. One end of the third resistor R3 is connected to the second output terminal on the other side of the interface CN, and the other end of the third resistor R3 is connected to one end of the first capacitor C1 and the second comparison input terminal of the comparator U. The other end of the first capacitor C1 is grounded.

[0038] Based on the above embodiments, the third resistor R3 and the first capacitor C1 are used for filtering to prevent interference signals from falsely triggering the comparator U, while also providing some surge and electrostatic protection.

[0039] According to some embodiments, the interface control circuit further includes a second capacitor C2, one end of which is connected to the output terminal of the comparator U, and the other end of which is grounded.

[0040] The second capacitor C2 is used to filter the power supply of the switch.

[0041] According to some embodiments, the interface control circuit further includes a first diode D1, the anode of the first diode D1 being connected to the comparator U, the other end of the first capacitor C1 and the other end of the second capacitor C2, and the cathode of the first diode D1 being grounded.

[0042] Based on the above embodiments, the first diode D1 is used to prevent the comparator U from being damaged by the reverse current voltage generated by the motor reversing when the window is closed.

[0043] According to some embodiments, the interface control circuit further includes a fourth resistor R4, one end of which is grounded and the other end of which is connected to the second comparison input terminal of the comparator U.

[0044] Based on the above embodiment, the fourth resistor R4 acts as a pull-down resistor, providing a low level to the second comparison input terminal of the comparator U when the coating thickness detection is initially activated. The fourth resistor R4 also serves as an anti-static resistor, diverting high-voltage static electricity to the location.

[0045] According to some embodiments, the switch includes a relay K and a second diode D2. One control terminal pin 1 of the relay K is connected to the negative terminal of the second diode D2 and the power input terminal of the comparator U. Both the control terminal pin 1 of the relay K and the power input terminal of the comparator U are connected to a power supply. The other control terminal pin 12 of the relay K is connected to the positive terminal of the second diode D2 and the output terminal of the comparator U. The first controlled terminal pin 3 of the relay K is connected to the power supply. The second controlled terminal pin 4 of the relay K is connected to the control terminal of the motor. The third controlled terminal pin 5 of the relay K is connected to the shunt circuit.

[0046] Based on the above embodiment, when the controller initially initiates the coating thickness detection, the inverting input of comparator U receives a low level, and the output of comparator U outputs a high level. The control terminal (coil terminal) of relay K is not energized. The first pin 3 of the controlled terminal (contactor terminal) of relay K is connected to the second pin 4 of the controlled terminal of relay K. The control terminal of the motor receives a high current and voltage control signal, driving the window to open at high speed. When the window opens to the set opening degree, the controller receives a signal indicating that the window has opened to the set opening degree. The controller inputs a high level to the inverting input of comparator U through interface CN. The inverting input of comparator U receives a high level, and the output of comparator U outputs a low level. The control terminal (coil terminal) of relay K is energized. The second pin 4 of the controlled terminal (contactor terminal) of relay K is connected to the third pin 5 of the controlled terminal of relay K. The control terminal of the motor is connected to the power supply through a shunt circuit, and the motor drives the window to open at low speed. When the window needs to be closed, the power supply to pin 3 of the first terminal (contactor terminal) of relay K and pin 5 of the third terminal of relay K is stopped, and the window returns to the closed state by the elastic mechanism.

[0047] When the power supply to the control terminal (coil terminal) of relay K is disconnected, the control terminal (coil terminal) of relay K has inductive reactance and requires current to continue flowing. The control terminal (coil terminal) of relay K freewheels through the second diode D2 to improve the service life of relay K.

[0048] According to some embodiments, the shunt circuit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a third capacitor C3. One end of the fifth resistor R5 is connected to one end of the sixth resistor R6, one end of the seventh resistor R7, one end of the third capacitor C3, and the controlled terminal pin 5 of the relay K. The other end of the fifth resistor R5 is connected to one end of the eighth resistor R8. The other end of the sixth resistor R6 is connected to one end of the ninth resistor R9. The other end of the seventh resistor R7 is connected to one end of the tenth resistor R10. The other end of the eighth resistor R8 is connected to the other ends of the ninth resistor R9, the tenth resistor R10, the third capacitor C3, and the power supply.

[0049] According to some embodiments, the controlled terminal 8 pin of the relay K and the controlled terminal 9 pin of the relay K are respectively connected to the two feedforward input terminals on the other side of the interface CN.

[0050] Based on the above embodiments, the two feedforward input terminals on the other side of interface CN are used to monitor the operating status of relay K, and further obtain the operating status of the motor and the operating status of the window. In some embodiments, the two feedforward input terminals on the other side of interface CN are reserved and may or may not be used.

[0051] According to some embodiments, the interface control circuit further includes a third diode D3 and an eleventh resistor R11. The positive terminal of the third diode D3 is grounded through the eleventh resistor R11, and the negative terminal of the third diode D3 is connected to the controlled terminal 4 pin of the relay K and the control terminal of the motor.

[0052] Based on the above embodiments, the third diode D3 and the eleventh resistor R11 form a freewheeling circuit when the motor reverses, which also plays a partial role in deceleration.

[0053] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An interface control circuit for a coating thickness detection window, characterized in that, The interface control circuit includes: A switch and a motor are provided. The first input terminal of the switch is connected to a power supply, and the output terminal of the switch is connected to the control terminal of the motor to control the operation of the motor. The motor is used to control the opening or closing of a window. A thickness detection sensor is provided inside the window. When the window is open, the thickness detection sensor detects the coating thickness. When the window is closed, the thickness detection sensor stops detecting the coating thickness. A shunt circuit is provided, one end of which is connected to a power source, and the other end of which is connected to the second input terminal of the switch. The comparator has its first comparison input connected to a reference voltage, and its output connected to the control terminal of the switch. The interface has one side for connecting to the controller interface, a first output terminal on the other side of the interface for connecting to the positive terminal of the motor, a negative terminal of the motor for grounding, and a second output terminal on the other side of the interface for connecting to the second comparison input terminal of the comparator. When the window is open, the second comparison input of the comparator receives a low level, and the comparator controls the first input of the switch to be electrically connected to the control terminal of the motor. When the window opens to a set degree, the second comparison input of the comparator receives a high level, and the comparator controls the second input of the switch to be electrically connected to the control terminal of the motor. When the window is closed, both the first and second inputs of the switch are de-energized, and the window elastically returns to the closed state. The switch includes a relay. The first controlled terminal of the relay is connected to a power source, the second controlled terminal of the relay is connected to the control terminal of the motor, and the third controlled terminal of the relay is connected to the shunt circuit. When the window needs to be closed, the power supply to both the first and third controlled terminal pins of the relay is stopped, and the window returns to the closed state by the elastic mechanism.

2. The interface control circuit according to claim 1, characterized in that, The interface control circuit also includes a voltage divider circuit, which includes a first resistor and a second resistor. One end of the first resistor is connected to a power supply, and the other end of the first resistor is connected to one end of the second resistor and the first comparison input terminal of the comparator. The other end of the second resistor is grounded.

3. The interface control circuit according to claim 1, characterized in that, The interface control circuit also includes a filter circuit, which includes a third resistor and a first capacitor. One end of the third resistor is connected to the second output terminal on the other side of the interface, and the other end of the third resistor is connected to one end of the first capacitor and the second comparison input terminal of the comparator. The other end of the first capacitor is grounded.

4. The interface control circuit according to claim 3, characterized in that, The interface control circuit also includes a second capacitor, one end of which is connected to the output of the comparator, and the other end of which is grounded.

5. The interface control circuit according to claim 4, characterized in that, The interface control circuit further includes a first diode, the anode of which is connected to the comparator, the other end of the first capacitor, and the other end of the second capacitor, and the cathode of the first diode is grounded.

6. The interface control circuit according to claim 1, characterized in that, The interface control circuit also includes a fourth resistor, one end of which is grounded and the other end of which is connected to the second comparison input terminal of the comparator.

7. The interface control circuit according to claim 1, characterized in that, The switch includes a second diode. One end of the control terminal of the relay is connected to the negative terminal of the second diode and the power input terminal of the comparator. Both the control terminal of the relay and the power input terminal of the comparator are connected to a power source. The other end of the control terminal of the relay is connected to the positive terminal of the second diode and the output terminal of the comparator.

8. The interface control circuit according to claim 7, characterized in that, The shunt circuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and a third capacitor. One end of the fifth resistor is connected to one end of the sixth resistor, one end of the seventh resistor, one end of the third capacitor, and the controlled third terminal of the relay. The other end of the fifth resistor is connected to one end of the eighth resistor, the other end of the sixth resistor is connected to one end of the ninth resistor, the other end of the seventh resistor is connected to one end of the tenth resistor, and the other end of the eighth resistor is connected to the other ends of the ninth resistor, the other end of the tenth resistor, the other end of the third capacitor, and the power supply.

9. The interface control circuit according to claim 7, characterized in that, The fourth and fifth controlled terminals of the relay are respectively connected to the two feedforward input terminals on the other side of the interface.

10. The interface control circuit according to claim 1, characterized in that, The interface control circuit also includes a third diode and an eleventh resistor. The positive terminal of the third diode is grounded through the eleventh resistor, and the negative terminal of the third diode is connected to the second controlled terminal of the relay and the control terminal of the motor.

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