Abnormal working alarm and dual start control circuit of low temperature plasma surface treatment equipment

Abstract

The present invention discloses a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit, relating to the technical field of low-temperature plasma surface treatment equipment. The circuit is electrically connected to the host of the low-temperature plasma surface treatment equipment and is characterized by including a CN1 aviation plug (female) for the rotary nozzle, a CN2 aviation plug (male) for the host circuit, a power supply output of +24V, -24V, other program-controlled passive outputs, a motor B1, and thyristors DZ1 and DZ2. The low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit has a streamlined device combination, low production cost, strong anti-interference ability, few peripheral components, and integrated circuit control. It can detect commonly used external motor-driven rotary nozzles, DC hollow motor rotary integrated nozzles, etc. on the market, and can achieve perfect detection without changing the existing wiring harness of the nozzle. The entire circuit and equipment are integrated with the output.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature plasma surface treatment equipment, in particular to a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit. Background Art

[0002] Low-temperature plasma surface treatment equipment on the market generally relies on I / O port output control for start / stop functions. This requires a single control method where the I / O power button must be short-circuited to turn on the power. The host cannot independently or remotely control the machine, and when the accompanying rotary nozzle malfunctions, the user cannot be notified in a timely manner. This results in a decrease in the dyne value of the product after surface treatment, posing a risk of product defects. Defective products, due to failure to be discovered in time, are released to end-users, resulting in adverse effects and serious consequences.

[0003] In order to completely solve the technical defects in the above-mentioned products, we have proposed a low-temperature plasma surface treatment equipment to detect abnormal operation of the rotary nozzle alarm and dual-start control circuit. The circuit solves the technical defects that have always existed in low-temperature plasma surface treatment equipment from the root, making the functions of low-temperature plasma surface treatment equipment more perfect, greatly improving the yield rate of products treated by low-temperature plasma surface treatment equipment, and eliminating the risk of defective products flowing into end-user customers. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit, the circuit being electrically connected to the host of the low-temperature plasma surface treatment equipment, characterized in that it includes a CN1 aviation plug (female) for the rotary nozzle, a CN2 aviation plug (male) for the host circuit, a power supply output +24V, -24V, other program-controlled passive outputs, a motor B1, and thyristors DZ1 and DZ2;

[0006] The low-temperature plasma surface treatment equipment is powered by a power supply output of +24V and -24V, which is connected to the capacitor CAP1 for filtering and energy storage through a diode D1 for reverse protection. The resistor R1, the voltage-stabilizing diode ZD1, the transistor Q1, and the capacitor CAP2 form a linear voltage-stabilized output of +12V to supply low-voltage power to the entire circuit;

[0007] The low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit also includes a detection circuit, and the detection circuit further includes sound and light alarms LED1 and LS1, and the sound and light alarms LED1 and LS1 are controlled by transistor Q4 for alarm output;

[0008] The low-temperature plasma surface treatment equipment abnormal operation alarm and dual start control circuit also includes relays KA1, KA2, self-recovery start switches K1, K2, and a passive contact K3 for dual start / stop control output.

[0009] To further optimize this technical solution, when the device is powered on and in standby mode, the detection circuit starts to intelligently detect whether the aviation plug of the nozzle is properly connected, the b-pole of the transistor Q4 is connected to a pull-up resistor R5 to the power supply +12V, and at the same time, the b-pole of the transistor Q4 is connected to the c-pole of the transistor Q5 to control the switching mode;

[0010] At this time, the e-pole of Q5 is pulled down to -24V (GND) to control the working state of Q4. The b-pole of Q5 is connected to one end of the resistor R6. The other end of R6 is connected to a two-way control signal anti-backflow diode D7 and D8. The other end of D7 is connected to a resistor R7. The other end of R7 is connected to pin 2 (24V-, negative end) of the CN2 aviation plug (male) to collect whether there is a signal connected to the CN1 aviation plug (female). The output pin 1 of the CN2 aviation plug (male) is connected to the power supply (24V+, positive end) of the rotary nozzle.

[0011] To further optimize this technical solution, when the device is only powered on and in standby mode, when the CN1 aviation plug (female) is connected to the CN2 aviation plug (male), because the device is not started, KA2 is disconnected, and the power supply (24V+) of the rotary sprinkler head is output through the CN2 aviation plug (male) to the CN1 aviation plug (female) pin 1, to the CN1 aviation plug (female) pin 1 of the rotary sprinkler head, and then a loop is formed by the internal circuit of the motor B1, from the CN1 aviation plug (female) pin 2 of the rotary sprinkler head, back to the CN2 aviation plug (male) pin 2 (24V-, negative terminal);

[0012] At this time, the CN2 output aviation plug (male) pin 2 (24V-, negative end) is at a high level. The high level passes through the resistor R7 to the diode D7 and the resistor R6 to control the b-pole current of the transistor Q5. The transistor Q5 works to pull down the b-pole high potential of the transistor Q4, so that the transistor Q4 is cut off. The negative poles of the sound and light alarms LED1 and LS1 in the detection circuit are open, and there is no alarm output. The rotary sprinkler has been connected normally, and the equipment is working normally in standby mode.

[0013] To further optimize this technical solution, when the device is only powered on and in standby mode, when the CN1 aviation plug (female) of the rotary nozzle is not connected to the CN2 output aviation plug (male) of the host circuit, because the device is not started, KA2 is disconnected, and the CN2 output aviation plug (male) of the host circuit is connected to pin 2 (24V-, negative terminal);

[0014] At this time, the aviation plug (male) pin 2 (24V-, negative end) is at a low level, there is no voltage from resistor R7 to diode D7 and resistor R6, there is no working current at the b-pole of transistor Q5, transistor Q5 is cut off, but the b-pole of transistor Q4 is kept at a high potential through the pull-up resistor R5, transistor Q4 is working, the cathode of the sound and light alarm LED1 and LS1 in the detection circuit is connected to -24V (GND), the sound and light alarm LED1 and LS1 output alarms, the rotary sprinkler is not connected normally, or the internal circuit of motor B1 is open, and the equipment detects an abnormal alarm output for the rotary sprinkler.

[0015] To further optimize this technical solution, the passive output controlled by other programs further includes remote (industrial control PLC) passive output or other software (MCU) passive output, and the K3 is connected to the I / O output end of the control port of the device, and the control port is divided into a remote start (stop) A end and a remote start (stop) B end.

[0016] To further optimize the technical solution, the dual-start control of the device includes manual control and software control.

[0017] To further optimize this technical solution, the manual control includes the following specific contents:

[0018] When the device is in standby mode, press the self-recovery start switch K1, and the power supply +12V voltage passes through the resistor R2 to limit the current and turn on the transistor Q2. The transistor Q2 works, and the negative pole of the relay KA1 coil reaches -24V (GND). The normally open point closes the output and feeds back to the resistor R3 and the diode D3, giving Q2 a continuous b-pole current. The transistor Q2 is always energized to form a self-locking KA1 output; after the device is started, press the self-recovery stop switch K2, and the power supply +12V voltage passes through the resistor R10 to limit the current and turn on the transistor Q6. The transistor Q6 pulls down the b-pole self-locking signal of the transistor Q2, the transistor Q2 is cut off, and the relay KA1 is disconnected to control the device to stop output.

[0019] To further optimize this technical solution, the software control includes the following specific contents:

[0020] When the device is in standby mode, press the self-recovery start switch K1 to start, and the relay KA1 will work and output. The remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 will start / stop, and the passive contact K3 will close and open to control the device to stop output.

[0021] Compared with the prior art, the present invention provides a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit, which has the following beneficial effects:

[0022] 1. The abnormal working alarm and dual start control circuit of the low-temperature plasma surface treatment equipment collects the electrical signal on the sampling resistor and judges whether the rotation is normal according to the working current of the rotary nozzle. The current signal is compared with the set reference voltage through the voltage comparator and output. It also uses the remote (industrial control PLC) passive contact to start / stop and stop the output power supply unit, realizing mutual control of software and hardware, and can also be controlled independently. There is no need to short-circuit the I / O port during single-machine testing.

[0023] 2. The abnormal working alarm and dual-start control circuit of the low-temperature plasma surface treatment equipment has a streamlined combination of devices, low production cost, strong anti-interference ability, few peripheral components, and integrated circuit control. It can detect commonly used external motor-driven rotary nozzles and DC hollow motor rotary integrated nozzles on the market, etc., and achieve perfect detection without changing the existing wiring harness of the nozzle. The entire circuit and equipment are integrated into the output. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a circuit diagram of an implementation of a low-temperature plasma surface treatment equipment abnormal operation alarm and dual-start control circuit proposed by the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] See also Figure 1 A low-temperature plasma surface treatment equipment abnormal working alarm and dual start control circuit consists of several resistors, capacitors, diodes, triodes, thyristors, sampling resistors, voltage regulator diodes, reference power supply integrated circuits, voltage signal comparison integrated circuits, relays, sound and light alarms, aviation plugs, self-recovery switches and other devices.

[0028] The low-temperature plasma surface treatment equipment is powered by the power supply output +24V and -24V, and is connected to the capacitor CAP1 for filtering and energy storage through the reverse protection of the diode D1. The resistor R1, the voltage-stabilizing diode ZD1, the transistor Q1, and the capacitor CAP2 form a linear voltage-stabilized output +12V to supply low-voltage power to the entire circuit. When the equipment is powered on and on standby, the detection circuit begins to intelligently detect whether the aviation plug of the nozzle is normally connected. The sound and light alarms LED1 and LS1 in the detection circuit are controlled by the transistor Q4. The b-pole of the transistor Q4 is connected to the pull-up resistor R5 to the power supply +12V. At the same time, the transistor Q4 The b-pole is connected to the c-pole of the transistor Q5 for switching mode control, and the e-pole of Q5 is pulled down to -24V (GND) to control the working state of Q4. The b-pole of Q5 is connected to one end of the resistor R6, and the other end of R6 is connected to two control signal anti-backflow diodes D7 and D8. The other end of D7 is connected to the resistor R7, and the other end of R7 is connected to the host circuit CN2 output aviation plug (male) pin 2 (24V-, negative end) to collect the signal whether the CN1 aviation plug (female) is connected. The CN2 output aviation plug (male) pin 1 of the host circuit is connected to the power supply (24V+, positive end) of the rotary nozzle of the host circuit.

[0029] When the device is only powered on and in standby mode, if the CN1 aviation plug (female) of the rotary nozzle is connected to the CN2 output aviation plug (male) of the host circuit, and the device is not started, KA2 is disconnected, and the power supply (24V+) of the rotary nozzle passes through the CN2 output aviation plug (male) pin 1 of the host circuit to the CN1 aviation plug (female) pin 1 of the rotary nozzle, and then forms a loop through the internal circuit of the motor B1, from the CN1 aviation plug (female) pin 2 of the rotary nozzle, back to the CN2 output aviation plug of the host circuit. The male pin 2 (24V-, negative end) of the head and the male pin 2 (24V-, negative end) of the host circuit CN2 output aviation plug are at a high level. The high level at this time passes through the resistor R7 to the diode D7 and the resistor R6 to control the b-pole current of the transistor Q5. The transistor Q5 works to pull down the b-pole high potential of the transistor Q4, so that the transistor Q4 is cut off. The negative poles of the sound and light alarms LED1 and LS1 in the detection circuit are open, and there is no alarm output. The rotary sprinkler has been connected normally, and the equipment is working normally in standby mode.

[0030] When the device is only powered on and in standby mode, such as the CN1 aviation plug (female) of the rotary nozzle is not connected to the CN2 output aviation plug (male) of the host circuit, KA2 is disconnected because the device is not started. At this time, pin 2 (24V-, negative end) of the CN2 output aviation plug (male) of the host circuit is at a low level. At this time, there is no voltage from resistor R7 to diode D7 and resistor R6, and there is no working current at the b-pole of transistor Q5. Transistor Q5 is cut off, but the b-pole of transistor Q4 is kept at a high potential through the pull-up resistor R5. Transistor Q4 works, and the negative poles of the sound and light alarms LED1 and LS1 in the detection circuit are connected to -24V (GND). The sound and light alarms LED1 and LS1 output alarms, the rotary nozzle is not connected normally, or the internal circuit of motor B1 is open, and the device detects an abnormal alarm output for the rotary nozzle.

[0031] When the device requires manual control, the relay KA1 coil in the circuit is controlled by transistor Q2. Diode D2 serves as the relay coil's freewheeling diode. The b-pole of transistor Q2 is connected to one end of resistor R2, with capacitor C1 connected in parallel to -24V (GND). The other end of resistor R2 is connected to the resettable start switch K1, which is connected to the +12V power supply. The b-pole of transistor Q2 is connected in parallel to diode D3, with the other end of diode D3 connected in series to resistor R3. The other end of resistor R3 is connected to the normally open point of KA1, and the other end of the normally open point of relay KA1 is connected to the +12V power supply, achieving a self-locking output after relay KA1 is activated. The b-pole of transistor Q2 is connected in parallel to the c-pole of transistor Q6, which is connected to resistor R10, with capacitor C2 connected in parallel to -24V (GND). The other end of resistor R10 is connected to the resettable stop switch K2, which is connected to the +12V power supply. When the device is in standby mode, pressing the self-recovery start switch K1 causes the +12V power supply to limit current through resistor R2, turning on transistor Q2. Transistor Q2 then operates, and the negative pole of relay KA1's coil reaches -24V (GND). The normally open point closes and outputs feedback to resistor R3 and diode D3, providing a continuous current to Q2's pole b. Transistor Q2 remains energized, forming a self-locking KA1 output. After startup, pressing the self-recovery stop switch K2 causes the +12V power supply to limit current through resistor R10, turning on transistor Q6. Transistor Q6 pulls down the self-locking signal at pole b of transistor Q2, turning off transistor Q2 and disconnecting relay KA1, achieving the device's manual stop function.

[0032] When the device requires software control, the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 is used to start / stop the control. K3 is connected to the I / O output terminal of the remote start (stop) A terminal and the remote start (stop) B terminal of the device. K3 is connected to the power supply +12V voltage at the remote start (stop) A terminal. K3 is connected in parallel with resistors R9, R12, R21, diode D9 and other devices at the remote start (stop) B terminal. One end of resistor R9 is connected to diode D6 in parallel with the A terminal of thyristor DK1. The G terminal of thyristor DK1 is connected to diode D10. Diode D10 is connected in parallel with resistor R13 and one end of diode D13. The other end of diode D6 is connected to resistor R2. Resistor R2 controls transistor Q2 One end of resistor R12 is connected to the b-pole of transistor Q8, the c-pole of transistor Q8 is connected in parallel with resistor R11 and the b-pole of transistor Q7, the b-pole of transistor Q7 is also connected in parallel with C3 to -24V (GND), the c-pole of transistor Q7 is connected in parallel with the c-pole of transistor Q6 and is also connected in parallel to the b-pole of pull-down transistor Q2, resistor R21 is connected to the status indicator LED2, the status indicator LED2 is connected in series with the thyristor ZD2 to -24V (GND), the G-pole of thyristor ZD2 is connected to diode D13, the other end of diode D9 is connected to the Zener diode ZD2, the other end of the Zener diode ZD2 is connected to capacitor CAP3, capacitor C6 is connected to -24V (GND), the positive pole of capacitor CAP3 is connected to resistor R11, and resistor R11 controls transistor Q7.

[0033] At this time, when the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 is closed and started (normally closed), the power supply +12V voltage passes through the resistor R9, diode D6, and resistor R2 to turn on the transistor Q2, the relay KA1 coil works, the contact closes and starts the output, and at the same time, the diode D9 and the voltage regulator diode DZ2 are turned on to charge the capacitor CAP3, and the resistor R12 is energized to control the transistor Q8 to pull down the transistor Q7 to cut off. When the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 changes from closed to open (stopped), the resistor R12 is de-energized and the transistor Q8 is cut off. Since the capacitor CAP3 is fully charged, it can discharge and output through the resistor R11 to control the transistor Q7, pulling down the b-pole self-locking signal of the transistor Q2. The transistor Q2 is cut off and the relay KA1 disconnects the output, achieving the function of stopping the output of the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3. ZD2 in the circuit is the key anti-interference design for software control start / stop.

[0034] Based on the above two control principles, when the self-recovery start switch K1 is pressed in standby mode, the relay KA1 works and outputs, and the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 starts / stops, and the passive contact K3 closes and opens to control the device to stop output.

[0035] Or when in standby mode, the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 starts / stops, the passive contact K3 closes and outputs, and the relay KA1 works and outputs. At this time, the host hardware self-recovery stop switch K2 is used to control the device to stop. The self-recovery stop switch K2 is activated, and the power supply +12V voltage is limited by the resistor R10 to turn on the transistor Q6. The transistor Q6 pulls down the b-pole self-locking signal of the transistor Q2, and the transistor Q2 is cut off. The relay KA1 disconnects the output, achieving the manual stop function of the equipment. At the same time, the resistor R13 is energized, and the diode D10 controls the thyristor DZ1 to lock the K3 on R9 to close and start the b-pole electrical signal of the transistor Q2. D13 controls the thyristor DZ2 self-locking status indicator LED2 to prompt that the software is started by the hardware stop state.

[0036] When the remote (industrial control PLC) passive contact K3 or other software (MCU) passive contact K3 starts / stops, and the passive contact K3 switches from closed output to open, the thyristor DZ1 and thyristor DZ2 are powered off and unlocked, returning to the waiting state, and the remote software and host hardware perfectly control each other.

[0037] Example 2:

[0038] Based on the abnormal working alarm and dual start control circuit of the low temperature plasma surface treatment equipment described in Example 1, Figure 1 As shown in the figure, the process of circuit abnormality alarm includes the following specific contents:

[0039] After the device starts outputting, relay KA1 works and closes the output power supply voltage (12V+) to provide power. After the device starts outputting, resistor R8, diode D8, and resistor R6 are energized to control transistor Q to turn on and work. The b pole of the pull-down transistor Q4 often pulls up the electrical signal, and transistor Q4 is cut off. At this time, the circuit intelligently detects whether the rotary nozzle CN1 aviation plug (female) is connected and the screen will turn off. The device starts output, relay KA2 works, contacts are closed, and pin 2 (24V-, negative end) of the output aviation plug (male) of the host circuit CN2 is connected to the power supply -24V (GND) through the sampling resistor R4. One end of the relay KA3 coil is connected to the power supply voltage (12V+), and the other end is connected to the transistor Q3. The b pole of the transistor Q3 is connected to the circuit R14. The other end of the resistor R14 is connected in parallel with the diode D11 and the diode D12. The diode D11 is connected to the output pin 7 of the voltage signal comparator integrated circuit U1B, the pin 5 of the voltage signal comparator integrated circuit U1B, the base voltage comparison voltage divider resistor R16, the capacitor C13 power supply -24V (GND), the pin 5 of the voltage signal comparator integrated circuit U1B, and at the same time connected in parallel to the resistor R18. The other end of the resistor R18 is connected to the (+2.5V) reference, the pin 6 of the voltage signal comparator integrated circuit U1B, the resistor R17, the capacitor C12 to the power supply -24V (GND), and the other end of the resistor R17 is connected to the sampling resistor The upper end of R4, the output pin 7 of the voltage signal comparison integrated circuit U1B, is connected to the capacitor C10 and fed back to the pin 6 of the voltage signal comparison integrated circuit U1B. The diode D12 is connected to the output pin 1 of the voltage signal comparison integrated circuit U1A. The pin 2 of the voltage signal comparison integrated circuit U1A is connected to the base voltage comparison voltage divider resistor R20, the capacitor C15 is connected to the power supply -24V (GND), the pin 2 of the voltage signal comparison integrated circuit U1A is connected to the resistor R19, and the other end of the resistor R19 is connected to the (+2.5V) reference. The pin 2 of the voltage signal comparison integrated circuit U1A is connected to the capacitor C14 to the pin 1 of the voltage signal comparison integrated circuit U1A. The pin 3 of the voltage signal comparison integrated circuit U1A is connected to the resistor R17 and is connected in parallel with the pin 6 of the voltage signal comparison integrated circuit U1B. The voltage signal comparison integrated circuit power supply pin 8 is connected to the power supply voltage (12V+), and the voltage signal comparison integrated circuit power supply pin 4 is connected to the power supply -24V (GND). The (+2.5V) reference voltage in the circuit is provided by the reference power supply integrated circuit U2. Pins 1 and 2 of U2 are connected in parallel, and the pull-up resistor R15 is connected to the power supply voltage (12V+). Pin 3 of the reference power supply integrated circuit U2 is connected to the power supply -24V (GND), and capacitors C7 and C8 filter and store energy.

[0040] When the equipment is started, the contact of relay KA2 closes and outputs, and the alarm circuit for detecting abnormal operation of the rotary nozzle begins to intelligently detect the working current of the rotary nozzle. When the motor B1 is working, a voltage signal is generated on the sampling resistor R4. This signal is sent to pin 3 of the voltage signal comparison integrated circuit U1A and pin 6 of U1B for signal comparison output. When motor B1 is undercurrent, burnt out, or open-circuited (CN1 is not connected), the voltage signal collected at pin 6 of U1B is less than the reference voltage set at pin 5 of U1B. Pin 7 of U1B outputs a high level, transistor Q3 conducts, coil KA3 energizes, and the sound and light alarms LED1 and LS1 in the detection circuit sound an alarm. Passive alarm outputs A and B close. When motor B1 is overcurrent, stalled, or short-circuited, the voltage signal collected at pin 3 of U1A is greater than the reference voltage set at pin 2 of U1B. Pin 1 of U1A outputs a high level, transistor Q3 conducts, coil KA3 energizes, and the sound and light alarms LED1 and LS1 in the detection circuit sound an alarm. Passive alarm outputs A and B close. By setting two sets of voltage signals to compare with different reference values ​​of the integrated circuit, segmented detection and judgment are achieved, rather than both at the same point. This design effectively avoids output fluctuation interference at adjacent points. The capacitance of capacitor C12 is a key factor in stabilizing the output.

[0041] Example 3:

[0042] Based on the abnormal working alarm and dual-start control circuit of the low-temperature plasma surface treatment equipment described in Examples 1 and 2, in this embodiment, an MCU plus a current and voltage acquisition circuit can also be used to replace the circuits described in Examples 1 and 2, or an instrument with a DC current, voltage, and power display setting alarm output can be used. However, it is difficult to realize advance detection and judgment when the equipment is on standby. The core of the circuit described in Examples 1 and 2 is a method of detecting the output of the equipment host to the power supply circuit of the rotary nozzle, and performing intelligent collection and judgment in the open and closed states of the output circuit.

[0043] The beneficial effects of the present invention are:

[0044] 1. The abnormal working alarm and dual start control circuit of the low-temperature plasma surface treatment equipment collects the electrical signal on the sampling resistor and judges whether the rotation is normal according to the working current of the rotary nozzle. The current signal is compared with the set reference voltage through the voltage comparator and output. It also uses the remote (industrial control PLC) passive contact to start / stop and stop the output power supply unit, realizing mutual control of software and hardware, and can also be controlled independently. There is no need to short-circuit the I / O port during single-machine testing.

[0045] 2. The abnormal working alarm and dual-start control circuit of the low-temperature plasma surface treatment equipment has a streamlined combination of devices, low production cost, strong anti-interference ability, few peripheral components, and integrated circuit control. It can detect commonly used external motor-driven rotary nozzles and DC hollow motor rotary integrated nozzles on the market, etc., and achieve perfect detection without changing the existing wiring harness of the nozzle. The entire circuit and equipment are integrated into the output.

[0046] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature plasma surface treatment equipment abnormal operation alarm and dual start control circuit, the circuit is electrically connected to the host of the low-temperature plasma surface treatment equipment, characterized in that: Including CN1 aviation plug of rotary nozzle, CN2 aviation plug of host circuit, power supply output +24V, -24V, other program-controlled passive outputs, motor B1 and thyristors DZ1 and DZ2; The low-temperature plasma surface treatment equipment is powered by a power supply output of +24V and -24V, which is connected to the capacitor CAP1 for filtering and energy storage through a diode D1 for reverse protection. The resistor R1, the voltage-stabilizing diode ZD1, the transistor Q1, and the capacitor CAP2 form a linear voltage-stabilized output of +12V to supply low-voltage power to the entire circuit; The abnormal working alarm and dual-start control circuit of the low-temperature plasma surface treatment equipment also includes a detection circuit, and the detection circuit further includes sound and light alarms LED1 and LS1. The sound and light alarms LED1 and LS1 are controlled by the transistor Q4 for alarm output; the b pole of the transistor Q4 is connected to the pull-up resistor R5 to the power supply +12V, and at the same time, the b pole of the transistor Q4 is connected to the c pole of the transistor Q5 for switching mode control, and the e pole of Q5 is pulled down to -24V to control the working state of Q4, the b pole of Q5 is connected to one end of the resistor R6, and the other end of R6 is connected to two control signal anti-backflow diodes D7 and D8, and the other end of D7 is connected to the resistor R7, and the other end of R7 is connected to the host circuit CN2 output aviation plug pin 2 to collect the signal whether the CN1 aviation plug is connected, and the CN2 output aviation plug pin 1 of the host circuit is connected to the power supply of the host circuit rotary nozzle; The low-temperature plasma surface treatment equipment abnormal operation alarm and dual start control circuit also includes relays KA1, KA2, self-recovery start switches K1, K2, and a passive contact K3 for dual start / stop control output.

2. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 1, characterized in that: When the device is powered on and in standby mode, the detection circuit starts to intelligently detect whether the aviation plug of the nozzle is properly connected. The b-pole of the transistor Q4 is connected to a pull-up resistor R5 to the power supply +12V. At the same time, the b-pole of the transistor Q4 is connected to the c-pole of the transistor Q5 to control the switching mode. At this time, the e-pole of Q5 is pulled down to -24V to control the working state of Q4. The b-pole of Q5 is connected to one end of the resistor R6. The other end of R6 is connected to two control signal anti-backflow diodes D7 and D8. The other end of D7 is connected to a resistor R7. The other end of R7 is connected to pin 2 of the CN2 aviation plug to collect whether there is a signal connected to the CN1 aviation plug. The output pin 1 of the CN2 aviation plug is connected to the power supply of the rotary nozzle.

3. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 1, characterized in that: When the device is powered on and in standby mode, when the CN1 aviation plug is connected to the CN2 aviation plug, because the device is not started, KA2 is disconnected, and the power supply to the rotary sprinkler is output through the CN2 aviation plug to the CN1 aviation plug pin 1, to the CN1 aviation plug pin 1 of the rotary sprinkler, and then the internal circuit of the motor B1 forms a loop, from the CN1 aviation plug pin 2 of the rotary sprinkler, back to the CN2 aviation plug pin 2; At this time, the pin 2 of the CN2 output aviation plug is high level, and the high level passes through the resistor R7 to the diode D7 and the resistor R6 to control the b-pole current of the transistor Q5. The transistor Q5 works to pull down the high potential of the b-pole of the transistor Q4, so that the transistor Q4 is cut off. The negative poles of the sound and light alarms LED1 and LS1 in the detection circuit are open, and there is no alarm output. The rotary sprinkler has been connected normally, and the equipment is working normally in standby mode.

4. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 1, characterized in that: When the device is only powered on and in standby mode, when the CN1 aviation plug of the rotary nozzle is not connected to the CN2 output aviation plug of the host circuit, because the device is not started, KA2 is disconnected, and the CN2 output aviation plug pin 2 of the host circuit; At this time, pin 2 of the aviation plug is at a low level, and there is no voltage from resistor R7 to diode D7 and resistor R6. There is no working current at the b-pole of transistor Q5, and transistor Q5 is cut off. However, the b-pole of transistor Q4 is kept at a high potential through the pull-up resistor R5, and transistor Q4 is working. The negative poles of the sound and light alarms LED1 and LS1 in the detection circuit are connected to -24V, and the sound and light alarms LED1 and LS1 output alarms. The rotary sprinkler is not connected normally, or the internal circuit of motor B1 is open, and the equipment detects an abnormal alarm output for the rotary sprinkler.

5. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 1, characterized in that: The passive output controlled by other programs further includes remote passive output or other software passive output. The K3 is connected to the I / O output end of the control port of the device. The control port is divided into a remote start / stop A end and a remote start / stop B end.

6. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 1, characterized in that: The dual-start control of the device includes manual control and software control.

7. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 6, characterized in that: The manual control includes the following specific contents: When the device is in standby mode, press the self-recovery start switch K1, and the power supply +12V voltage passes through the resistor R2 to limit the current and turn on the transistor Q2. The transistor Q2 works, and the negative pole of the relay KA1 coil reaches -24V. The normally open point closes the output and feeds back to the resistor R3 and the diode D3, giving Q2 a continuous b-pole current. The transistor Q2 is always energized to form a self-locking KA1 output; after the device is started, press the self-recovery stop switch K2, and the power supply +12V voltage passes through the resistor R10 to limit the current and turn on the transistor Q6. The transistor Q6 pulls down the b-pole self-locking signal of the transistor Q2, the transistor Q2 is cut off, and the relay KA1 is disconnected to control the device to stop output.

8. The abnormal operation alarm and dual start control circuit of low temperature plasma surface treatment equipment according to claim 6, characterized in that: The software control includes the following specific contents: When the device is on standby, press the self-recovery start switch K1 to start, and the relay KA1 will work and output. The remote passive contact K3 or other software passive contact K3 will start / stop, and the passive contact K3 will close and open to control the device to stop output.

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