CN112512157B

CN112512157B - UV lamp control circuit and coating line body inspection equipment

Info

Publication number: CN112512157B
Application number: CN202011432396.9A
Authority: CN
Inventors: 尚叶; 丁元新; 刘鹏
Original assignee: Shennan Circuit Co Ltd
Current assignee: Shennan Circuit Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2023-01-24
Anticipated expiration: 2040-12-09
Also published as: CN112512157A

Abstract

A UV lamp control circuit and a device for inspecting a coated line body, wherein the UV lamp control circuit comprises a switch control circuit and a UV lamp working circuit; the power supply end of the switch control circuit is connected with the input end of the direct-current power supply, the control end of the switch control circuit is connected with the controlled end of the UV lamp working circuit, and the power supply end of the UV lamp working circuit is connected with the input end of the alternating-current power supply; the switch control circuit is provided with a PCB sensor, and the input end of the PCB sensor is connected with the power supply end of the switch control circuit; and the switch control circuit is used for controlling the conduction of the UV lamp working circuit when the PCB sensor detects the PCB on the test connection table. The technical scheme of the invention improves the convenience of detection of the coating line in the PCB.

Description

UV lamp control circuit and dressing coating line body inspection equipment

Technical Field

The invention relates to the technical field of line detection of printed board assemblies, in particular to a UV lamp control circuit and a coating line inspection device.

Background

At present, after a Printed Circuit Board (PCB) is coated by a conformal coating device, a production operator needs to visually inspect a coated product before curing, and the poor phenomena of missing coating, little coating material, no orange peel and the like are avoided through visual inspection. The production operator needs to assist in the inspection by means of UV (Ultra-Violet Ray) lamps during visual inspection. However, the existing UV lamp adopts a click switch, and a production operator needs to press the click switch with fingers to keep the UV lamp on. If the normally-on switch is adopted to control the UV lamp, the energy consumption of the UV lamp is increased and the ultraviolet rays hurt production operators.

Disclosure of Invention

The invention mainly aims to provide a UV lamp control circuit and conformal coating line body inspection equipment, and aims to improve the convenience of detection of conformal coating line bodies in a PCB.

In order to achieve the purpose, the UV lamp control circuit provided by the invention comprises a switch control circuit and a UV lamp working circuit;

the power supply end of the switch control circuit is connected with the input end of the direct-current power supply, the control end of the switch control circuit is connected with the controlled end of the UV lamp working circuit, and the power supply end of the UV lamp working circuit is connected with the input end of the alternating-current power supply;

the switch control circuit is provided with a PCB sensor, and the input end of the PCB sensor is connected with the power supply end of the switch control circuit;

and the switch control circuit is used for controlling the conduction of the UV lamp working circuit when the PCB sensor detects the PCB on the test connection table.

Optionally, the switch control circuit further comprises a first solid state relay;

the switch control circuit is provided with a positive electrode power source end and a negative electrode power source end, a first input end of the PCB sensor is connected with the positive electrode power source end of the switch control circuit, a second input end of the PCB sensor is connected with the negative electrode power source end of the switch control circuit, and the first solid-state relay is connected between an output end of the PCB sensor and the negative electrode power source end of the switch control circuit.

Optionally, the switch control circuit further comprises a first normally open switch, a second solid state relay, and a first normally closed switch;

the first end of the first normally open switch is connected with the negative pole power source end of the switch control circuit, the second end of the first normally open switch is connected with the second end of the second solid-state relay, the first end of the second solid-state relay is connected with the second end of the first normally closed switch, and the first end of the first normally closed switch is connected with the positive pole power source end of the switch control circuit.

Optionally, the switch control circuit further comprises a time relay, a second normally open switch and a second normally closed switch;

the first end of the time relay is connected with the second end of the first normally closed switch, the second end of the time relay is connected with the first end of the second normally closed switch, the second end of the second normally closed switch is connected with the second end of the second normally open switch, and the first end of the second normally open switch is connected with the negative electrode power source end of the switch control circuit.

Optionally, the UV lamp operating circuit further comprises a third normally-on switch, a fourth normally-on switch and a UV lamp;

the UV lamp working circuit is provided with a live wire end and a zero line end, the live wire end of the UV lamp working circuit is connected with the third normally-open switch between the first end of the UV lamp, and the zero line end of the UV lamp working circuit is connected with the second end of the UV lamp by the fourth normally-open switch.

Optionally, the dc power voltage at the dc power input terminal is 3V to 36V.

Optionally, the ac power voltage at the ac power input terminal is 110V to 380V.

Optionally, the power supply end of the UV lamp operating circuit is connected in parallel to the ac power supply input end of the test docking station.

Optionally, the PCB sensor is a distance sensor or an infrared photoelectric sensor.

The invention also provides a device for inspecting the shape-coated line body, which comprises the UV lamp control circuit;

the UV lamp control circuit comprises a switch control circuit and a UV lamp working circuit;

The UV lamp control circuit in the technical scheme of the invention is applied to the coating line body inspection equipment with a PCB test connection table, and comprises a switch control circuit and a UV lamp working circuit, wherein the switch control circuit is provided with a PCB sensor; the power supply end of the switch control circuit is connected with the input end of the direct-current power supply so as to access direct-current power supply voltage to supply power for the switch control circuit and the PCB sensor in the switch control circuit, so that the switch control circuit and the PCB sensor in the switch control circuit can work normally; the control end of the switch control circuit is connected with the controlled end of the UV lamp working circuit, and when a PCB sensor on the switch control circuit detects a PCB on the test connection table, the conduction of the UV lamp working circuit can be controlled; the power supply end of the UV lamp working circuit is connected with the input end of the alternating current power supply so as to access alternating current power supply voltage to supply power for the UV lamp working circuit. The technical scheme of the invention solves the problems that in the related art, when visual inspection is carried out on the shape-coated line body of the PCB on the test connection table, a finger is required to press the touch switch to keep the UV lamp on, and the operation is complicated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of an embodiment of a UV lamp control circuit according to the present invention.

The reference numbers indicate:

reference numerals	Name (R)	Reference numerals	Name(s)
				10	Switch control circuit	KT	Time relay
11	PCB sensor	K1	First normally open switch
				20	UV lamp working circuit	K2	Second normally open switch
21	UV lamp	K3	Third normally open switch
				AC	AC power supply input terminal	K4	Fourth normally open switch
DC	DC power supply input terminal	KT1	The first normally closed switch
				KA1	First solid state relay	KT2	Second normally closed switch
KA2	Second solid state relay

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a UV lamp control circuit which is applied to a coating line body inspection device with a PCB test connection table. Conformal coating (Conformal coating) refers to a process of coating a specific material on a PCB to form an insulating protective layer that conforms to the shape of an object to be coated. The conformal coating has the functions of preventing water, dust and direct contact with severe environment, preventing conductive pollutants, chemical erosion, vibration and impact, and provides structural reinforcement, thereby improving electrical insulation and heat dissipation performance. Allowing the high voltage components to be assembled in closer proximity. The method is the most common method for coating the surface after welding at present, can isolate sensitive electronic components from a severe environment, and greatly improves the service life, safety and reliability of electronic products.

In the related art, the Printed Circuit Board (PCB) on the test connection table is coated in a shape-laying mode, the coated PCB may have poor phenomena of missing coating, less coating materials, orange peel and the like, and a production operator needs to irradiate the PCB by means of a UV lamp to visually inspect the coated PCB. However, in the current detection of the coating line on the PCB, the UV lamp needs to be kept on by pressing the touch switch with fingers by a production operator, and the operation is complicated. If the normally-on switch is adopted to control the UV lamp, the energy consumption of the UV lamp is increased, and the ultraviolet rays can cause damage to a production operator.

In order to solve the above problem, in an embodiment of the present invention, referring to fig. 1, the UV lamp control circuit includes a switching control circuit 10 and a UV lamp operating circuit 20;

a power supply end of the switch control circuit 10 is connected with a direct current power supply input end DC, a control end of the switch control circuit 10 is connected with a controlled end of the UV lamp working circuit 20, and a power supply end of the UV lamp working circuit 20 is connected with an alternating current power supply input end AC;

the switch control circuit 10 is provided with a PCB sensor 11, and the input end of the PCB sensor 11 is connected with the power supply end of the switch control circuit 10;

the switch control circuit 10 is configured to control the UV lamp operating circuit 20 to be turned on when the PCB sensor 11 detects a PCB on the test connection table.

In this embodiment, the power supply end of the switch control circuit 10 is connected to the DC power supply input terminal DC, and the power supply end of the UV lamp operating circuit 20 is connected to the AC power supply input terminal AC; it will be appreciated that the switch control circuit 10, including the PC board sensor 11 and the switch control device, is powered by a separate dc power supply, and the UV lamp operating circuit 20, including the UV lamp, is powered by a separate ac power supply. The control end of the switch control circuit 10 is connected to the controlled end of the UV lamp operating circuit 20, that is, when the PCB sensor in the switch control circuit 10 detects that there is a PCB board on the test docking station, the UV lamp operating circuit 20 is controlled to be turned on. With this, when having the PCB board at the test platform of plugging into, the operation of automatic control UV lamp working circuit 20 has promoted the convenience that the shape of laying coated wire body detected in the PCB circuit board.

In this embodiment, the UV lamp is a gas discharge lamp, the gas discharge lamp is divided into arc discharge and glow discharge, and the UV lamp commonly used in UV curing is an arc discharge lamp, and its operating principle is: quantitative high-purity mercury is added into a vacuum quartz tube, and ion discharge is generated by providing a voltage difference to electrodes at two ends, so that ultraviolet radiation is generated. In this scheme adopt the UV lamp to provide structural reinforcement to the shape of spreading of PCB board coating line body promptly.

In the above embodiment, the PCB sensor 11 is a distance sensor or an infrared photoelectric sensor. It can be understood that the PCB sensor 11 may be disposed on the test connection platform to detect whether there is a PCB on the test connection platform, that is, in this scheme, as long as it can detect whether there is a PCB on the test connection platform, the specific type of the PCB sensor 11 may be set according to the actual application, and the present disclosure is not limited herein.

The UV lamp control circuit in the technical scheme of the invention is applied to the detection equipment of the coating line body with a PCB test connection table, and comprises a switch control circuit 10 and a UV lamp working circuit 20, wherein the switch control circuit 10 is provided with a PCB sensor 11; the power supply end of the switch control circuit 10 is connected with the direct-current power supply input end DC to connect direct-current power supply voltage to supply power for the switch control circuit 10 and the PCB sensor 11 in the switch control circuit 10, so that the switch control circuit 10 and the PCB sensor 11 in the switch control circuit 10 can work normally; the control end of the switch control circuit 10 is connected with the controlled end of the UV lamp working circuit 20, and when the PCB sensor 11 on the switch control circuit 10 detects a PCB on the test connection table, the conduction of the UV lamp working circuit 20 can be controlled; the power supply end of the UV lamp operating circuit 20 is connected to the AC power supply input terminal AC to supply AC power to the UV lamp operating circuit 20. The technical scheme includes that the problems that when visual inspection is carried out on the shape-coated wire body of the PCB on the test connection table in the related art, a finger is required to press a touch switch to keep the UV lamp on and the operation is complex are solved, the PCB on the test connection table is automatically detected through a PCB sensor in a switch control circuit 10, a UV lamp working circuit 20 is controlled to be automatically started, and the convenience of detection of the shape-coated wire body in the PCB is improved.

In one embodiment, referring to fig. 1, the switch control circuit 10 further comprises a first solid state relay KA1;

the switch control circuit 10 is provided with an anode power supply end and a cathode power supply end, a first input end of the PCB sensor 11 is connected with the anode power supply end of the switch control circuit 10, a second input end of the PCB sensor 11 is connected with the cathode power supply end of the switch control circuit 10, and the first solid-state relay KA1 is connected between the output end of the PCB sensor 11 and the cathode power supply end of the switch control circuit 10.

In this embodiment, the switch control circuit 10 further includes a first normally open switch K1, a second solid-state relay KA2, and a first normally closed switch KT1;

the first end of first normally open switch K1 with switch control circuit 10's negative pole power source end is connected, first normally open switch K1's second end with second solid state relay KA 2's second end is connected, second solid state relay KA 2's first end with first normally closed switch KT 1's second end is connected, first normally closed switch KT 1's first end with switch control circuit 10's positive pole power source end is connected.

Further, the switch control circuit 10 further includes a time relay KT, a second normally open switch K2, and a second normally closed switch KT2;

the first end of time relay KT with the second end of first normally closed switch KT1 is connected, the second end of time relay KT with the first end of second normally closed switch KT2 is connected, the second end of second normally closed switch KT2 with the second of second normally open switch K2 is held and is connected, the first end of second normally open switch K2 with the negative pole power supply end of on-off control circuit 10 is connected.

It should be noted that, based on the above description of the connection relationship of each component in the switch control circuit 10, the first normally open switch K1 in the switch control circuit 10 is a switch in the first solid-state relay KA1, and is controlled by the first solid-state relay KA1 to be opened/closed; the second normally open switch K2 is a switch in the second solid-state relay KA2 and is controlled by the second solid-state relay KA2 to be opened/closed; the first normally closed switch KT1 and the second normally closed switch KT2 are switches in the time relay KT, and are controlled by the time relay KT to be opened/closed.

In one embodiment, as shown in fig. 1, the UV lamp operating circuit 20 further includes a third normally-open switch K3, a fourth normally-open switch K4, and a UV lamp 21;

the UV lamp working circuit 20 is provided with a live wire end and a zero line end, the live wire end of the UV lamp working circuit 20 is connected with the third normally-open switch K3 between the first end of the UV lamp 21, and the zero line end of the UV lamp working circuit 20 is connected with the second end of the UV lamp 21 and is connected with the fourth normally-open switch K4.

In this embodiment, the third normally-open switch K3 and the fourth normally-open switch K4 are switches in the second solid-state relay KA2, and are controlled to be opened/closed by the second solid-state relay KA 2.

In the above embodiment, the power supply terminal of the UV lamp operating circuit 20 is connected in parallel to the AC power supply input terminal AC of the test docking station. That is, the UV lamp 21 is installed on the test docking station, and the power end of the UV lamp 21 can be connected to the circuit of the test docking station. Since the power supply of the UV lamp 21 is the alternating voltage of the mains supply, the low-voltage switch control circuit 10 can be used to control the high-voltage UV lamp operating circuit 20 to be started, so as to improve the safety of the UV lamp 21 control circuit.

In this embodiment, a jumper is connected in parallel at the output end of the PCB sensor 11 of the switch control circuit 10 to access the negative power end of the DC power input DC, a live wire (L) and a zero wire (N) are connected in parallel to the third normally open switch K3 and the fourth normally open switch K4 of the second solid-state relay KA2 of the UV lamp operating circuit 20 on the main power supply of the test docking station, that is, the live wire and the zero wire of the AC power input AC are connected to the normally open contacts (6-10) and the normally open contacts (8-12) in the second solid-state relay KA2 of the UV lamp operating circuit 20, and the on/off of the UV lamp operating circuit 20 is controlled by the first solid-state relay KA1, the second solid-state relay KA2 and a time relay KT.

Based on the above embodiment, the working principle of the present scheme is that when the PCB sensor 11 in the switch control circuit 10 senses that the test connection table has a PCB, the first input end (positive electrode) of the PCB sensor 11 and the output end connected to the first solid-state relay KA1 form a closed loop, at this time, the first solid-state relay KA1 is powered, the coil of the first solid-state relay KA1 is attracted, the first normally open switch K1 is closed (normally open contacts 9-5 in the first solid-state relay KA1 are closed), the time relay KT and the second solid-state relay KA2 are powered and closed, the second normally open switch K2, the third normally open switch K3 and the fourth normally open switch K4 are closed (normally open contacts 9-5, normally open contacts 6-10 and normally open contacts 8-12 of the second solid-state relay KA2 are closed), the UV lamp 21 in the UV lamp working circuit 20 is turned on, and the time relay KT starts to count down, the time relay instantaneously opens the first normally closed switch 1 and the second normally closed switch 2 (normally open contacts 5-10 and normally open contacts 8 of the KT 1-4) after the count down is finished, the second normally closed switch KT2 and the second normally closed circuit KT2 and the second solid-state relay 10 is turned off, and the electric reset circuit 20 is reset. And when the PCB board passes through the test connection table completely, the PCB board sensor 11 cannot detect the PCB board, and the first relay is powered off and reset to wait for the next trigger. This scheme has promoted the convenience that the shape of applying coated wire body detected in the PCB circuit board. Meanwhile, when no PCB is arranged on the test connection table, the UV lamp working circuit 20 is not connected with the input end AC of the alternating current power supply, and the UV lamp 21 is controlled by a normally-on switch, so that the electric energy loss of the UV lamp 21 is reduced.

It is understood that the timing time of the time relay KT in the present embodiment is preferably a countdown time 15S, which can be set according to practical application, and is not limited specifically here.

Based on the above embodiment, the DC power voltage at the DC power input terminal DC is 3V to 36V. That is, the DC power voltage input by the DC power input terminal DC may be 3V, 24V, 36V, etc., and according to the actual application, the power terminal input DC power voltage of the switch control circuit 10 in this embodiment may preferably be 24V. The alternating current power supply voltage of the alternating current power supply input end AC is 110V-380V. That is, the AC power voltage inputted from the AC power input terminal AC may be 110V, 220V, 380V, etc., and according to the actual application, the AC power voltage inputted from the power terminal of the UV lamp operating circuit 20 in this embodiment may preferably be 220V.

The invention also provides a dressing coated line body inspection device, which comprises the UV lamp 21 control circuit;

the UV lamp 21 control circuit comprises a switch control circuit 10 and a UV lamp working circuit 20;

the power end of the switch control circuit 10 is connected with a direct current power supply input end DC, the control end of the switch control circuit 10 is connected with the controlled end of the UV lamp working circuit 20, and the power end of the UV lamp working circuit 20 is connected with an alternating current power supply input end AC;

the switch control circuit 10 is configured to control the UV lamp working circuit 20 to be turned on when the PCB sensor 11 detects a PCB on the test docking station. It can be understood that the control circuit of the UV lamp 21 may also be electrical equipment such as an ion blower and a lamp tube of a test connection table of an automatic operation line, and the control circuit of the UV lamp 21 may also be used for circuit control that does not need to work for a long time, such as corridor lighting, air showers, and the like, in a manner that the control circuit of the UV lamp 21 controls the turning on of the UV lamp 21.

The specific structure of the UV lamp 21 control circuit refers to the above embodiments, and since the conformal coated wire body inspection equipment adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated here.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the technical scope of the present invention, are included in the present invention.

Claims

1. A UV lamp control circuit is applied to a dressing coating line body inspection device with a PCB test connection table and is characterized in that the UV lamp control circuit comprises a switch control circuit and a UV lamp working circuit;

the UV lamp working circuit is used for controlling the UV lamp to work so that the UV lamp can carry out UV curing on the PCB and/or provide a light source for UV detection on the PCB;

and the switch control circuit is used for controlling the conduction of the UV lamp working circuit when the PCB sensor detects the PCB on the test connection table so as to control the UV lamp to carry out UV curing on the PCB and/or provide a light source for UV detection on the PCB.

2. The UV lamp control circuit of claim 1, wherein the switch control circuit further comprises a first solid state relay;

3. The UV lamp control circuit of claim 2, wherein the switch control circuit further comprises a first normally open switch, a second solid state relay, and a first normally closed switch;

the first end of the first normally open switch is connected with the negative electrode power source end of the switch control circuit, the second end of the first normally open switch is connected with the second end of the second solid-state relay, the first end of the second solid-state relay is connected with the second end of the first normally closed switch, and the first end of the first normally closed switch is connected with the positive electrode power source end of the switch control circuit.

4. The UV lamp control circuit of claim 3, wherein the switch control circuit further comprises a time relay, a second normally open switch, and a second normally closed switch;

the first end of the time relay is connected with the second end of the first normally closed switch, the second end of the time relay is connected with the first end of the second normally closed switch, the second end of the second normally closed switch is connected with the second end of the second normally open switch, and the first end of the second normally open switch is connected with the negative power source end of the switch control circuit.

5. The UV lamp control circuit of claim 1, wherein the UV lamp operating circuit further comprises a third normally-on switch, a fourth normally-on switch, and a UV lamp;

6. The UV lamp control circuit of any one of claims 1-5, wherein a DC supply voltage at the DC supply input is 3V-36V.

7. The UV lamp control circuit according to any one of claims 1 to 5, wherein the AC power supply voltage at the AC power supply input terminal is 110V-380V.

8. The UV lamp control circuit of any one of claims 1-5, wherein the power supply terminals of the UV lamp operating circuit are connected in parallel to the AC power input terminal of the test docking station.

9. The UV lamp control circuit of any one of claims 1 to 5, wherein the PCB sensor is a distance sensor or an infrared photosensor.

10. A conformal coated wire body inspection apparatus, characterized in that the conformal coated wire body inspection apparatus comprises a UV lamp control circuit according to any one of claims 1 to 9.