Laser control circuit based on multiple interfaces and multiple levels

Abstract

The utility model discloses a laser control circuit based on multiple interfaces and multiple levels, which belongs to the technical field of lasers, and comprises a motion control module used for generating an enable signal; the selection switching module is connected with the motion control module and is used for realizing signal gating of a plurality of lasers in the laser module by adopting a physical jumper mode; the input end of the photoelectric coupling isolation module is connected with the output end of the selection switching module, and the output end of the photoelectric coupling isolation module is connected with a laser module; the laser module comprises at least two lasers with different working levels, and each laser is connected with a corresponding output port of the photoelectric coupling isolation module; according to the control circuit, the laser is controlled through the selection switching module and the photoelectric coupling isolation module, so that conversion and fault isolation of various levels are realized, and the response time lt of photoelectric isolation is realized; and 170us.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of laser, specifically relates to a laser control circuit based on multi -interface and multilevel. BACKGROUND

[0002] In the field of chip resistor processing equipment, it is usually required to integrate various lasers (such as infrared laser, ultraviolet laser and the like) to realize different processing requirements. However, each laser in the prior art needs to be configured with an independent control circuit, and the working level of each laser is significantly different (such as low-voltage driving type and high-voltage driving type). This discrete control scheme has the following technical defects in actual application:

[0003] 1. High system complexity: multiple independent control circuits lead to redundant wiring of the equipment, not only increasing the physical size of the circuit board, but also requiring strict differentiation of different interfaces in the manufacturing and assembly process, significantly reducing production efficiency. According to statistics, the assembly error rate increases by about 15-20% due to such design, directly increasing production costs.

[0004] 2. Reliability risk: the existing discrete circuit lacks control failure protection mechanism, and cannot guarantee the determinacy of the control signal of the laser under uncertain enable signal. CONTENT OF THE UTILITY MODEL

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a laser control circuit based on multi -interface and multilevel, which controls the laser through selection switching module and photoelectric coupling isolation module, realizes multiple level conversion and fault isolation, and the response time of photoelectric isolation is <170us.

[0006] The utility model realizes the following technical scheme:

[0007] A laser control circuit based on multi -interface and multilevel, comprising:

[0008] A motion control module for generating an enable signal;

[0009] A selection switching module connected to the motion control module, which realizes signal gating of multiple lasers in the laser module by physical jumper mode;

[0010] A photoelectric coupling isolation module, the input end is connected with the output end of the selection switching module, and the output end is connected with the laser module, which is used for realizing electrical isolation and level conversion;

[0011] A laser module comprising at least two lasers with different working levels, each laser is connected with the corresponding output port of the photoelectric coupling isolation module.

[0012] Further, the motion control module is composed of a motion controller and a terminal board, the motion controller is connected with the terminal board, a power input end of the terminal board is connected with the power module, and an output end of the terminal board is connected with an input end of the photoelectric coupling module.

[0013] Further, the selection switching module comprises square pin groups arranged in a matrix, and a laser type identifier is arranged beside each pin group.

[0014] Further, the photoelectric coupling isolation module is composed of a photoelectric coupler and a resistor, and the resistor is arranged on the output side of the photoelectric coupler.

[0015] Further, the photoelectric coupling module comprises three output ports, namely a current control interface, a level control interface and an open drain control interface; wherein the current control interface is used for driving a current control type laser, the output current range is 6-10 mA, the level control interface is used for driving a level control type laser, and the open drain control interface is used for switch control of an open drain control type laser, and is compatible with voltage inputs of 3.3 V, 5 V and 24 V.

[0016] Further, the laser module comprises an ultraviolet laser and an infrared laser, wherein the ultraviolet laser is connected with the open drain control interface of the photoelectric coupling module, and the infrared laser is connected with the current control interface and the level control interface of the photoelectric coupling module.

[0017] Further, the selection switching module is further arranged between the photoelectric coupling isolation module and the laser module, so that when the signal output by the motion control module is incorrect or uncertain, the laser can be ensured to be in a non-light-emitting state.

[0018] Further, the laser control circuit further comprises a power module, which provides power supply for the motion control module, the selection switching module and the photoelectric coupling isolation module.

[0019] Compared with the prior art, the laser control circuit has the following advantages:

[0020] The laser control circuit based on multiple interfaces and multiple levels realizes circuit integration through the motion control module and the selection switching module, solves the problem of wiring redundancy, and adopts the selection switching module arranged between the photoelectric coupling isolation module and the laser module, so as to play a failure protection mechanism role, and the control circuit has the advantages of low complexity, low maintenance cost and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific embodiments or prior art descriptions will be made below with reference to the accompanying drawings. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0022] Figure 1 A structural block diagram of a laser control circuit based on multiple interfaces and multiple levels for Embodiment 1 of the present application;

[0023] Figure 2 A structural block diagram of a laser control circuit based on multiple interfaces and multiple levels for Embodiment 2 of the present application;

[0024] Figure 3 A circuit block diagram of a laser control circuit based on multiple interfaces and multiple levels for Embodiment 2 of the present application;

[0025] Figure 4 An interface schematic diagram of the optoelectronic coupling isolation module of the present application;

[0026] Figure 5 A control circuit schematic diagram of the ultraviolet laser of the present application. DETAILED DESCRIPTION

[0027] In order to clearly and completely describe the technical solutions of the present application and the specific working process thereof, in combination with the accompanying drawings, the specific embodiments of the present application are as follows:

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Example 1

[0032] like Figure 1 As shown, this embodiment provides a laser control circuit based on multiple interfaces and multiple levels, including:

[0033] The motion control module is used to generate enable signals;

[0034] The selection switching module is connected to the motion control module to perform one-channel to multiple-channel selection switching. The signal selection of multiple lasers in the laser module is realized by physical jumper wires, which reduces the voltage drop of the power supply.

[0035] An optocoupler isolation module has its input end connected to the output end of the selection switching module and its output end connected to the laser module, used to achieve electrical isolation and level conversion;

[0036] The laser module includes at least two lasers with different operating levels, and each laser is connected to the corresponding output port of the optocoupler isolation module.

[0037] In this embodiment, the motion control module consists of a motion controller and a terminal board, and has general I / O functions. The motion controller is connected to the terminal board, the power input terminal of the terminal board is connected to the power module, and the output terminal of the terminal board is connected to the input terminal of the optocoupler module. In this embodiment, the motion controller selected is a GTS-800 series motion controller.

[0038] The selection switching module includes a matrix of square pin groups, model B2P-VH(LF), HB-PH3-25413PB2GOP; each group of pins has a laser type identifier next to it.

[0039] The photoelectric coupling isolation module is composed of a photoelectric coupler and a resistor, and the resistor is arranged at the output side of the photoelectric coupler; wherein, the photoelectric coupler used in the embodiment is of TLP521 type, and the resistor used is of A05-103J type;

[0040] The photoelectric coupling module includes three output ports, namely a current control interface, a level control interface and an open-drain control interface; wherein, the current control interface is used to drive a current control type laser, and the output current range is 6-10 mA; the level control interface is used to drive a level control type laser, and the output voltage range is 5 V; and the open-drain control interface is used to control the switch of an open-drain control type laser, and is compatible with voltage inputs of 3.3 V, 5 V and 24 V.

[0041] The laser module used in the embodiment is compatible with multiple levels (3.3 V, 5 V, 24 V) of lasers, and is connected with the corresponding output ports of the photoelectric coupling isolation module, specifically including an ultraviolet laser and an infrared laser, wherein, the ultraviolet laser is connected with the open-drain control interface of the photoelectric coupling module, and the infrared laser is connected with the current control interface and the level control interface of the photoelectric coupling module.

[0042] The laser control circuit further includes a power module, which provides power for the motion control module, the selection switching module and the photoelectric coupling isolation module.

[0043] As shown in Figure 5 The working principle of the laser control circuit based on multiple interfaces and multiple levels according to the embodiment is as follows:

[0044] Firstly, the operator inserts the jumper cap into the corresponding square pin group according to the type of the laser, at this time, the GTS-800 motion controller does not output an enable signal, the photoelectric coupler and the resistor form a loop, the light-emitting diode is turned on, thereby opening the drain output of the photoelectric coupler, pulling down the level of the ultraviolet laser interface, and the ultraviolet laser stops emitting light after sensing no level, that is, the laser is in a non-emitting state;

[0045] When the GTS-800 motion controller outputs an enable signal, the current flowing through the photoelectric coupler is cut off, the light-emitting diode is extinguished, thereby closing the drain output of the photoelectric coupler, the level of the ultraviolet laser interface is restored, and the ultraviolet laser emits light immediately after sensing the level, that is, the laser is in an emitting state;

[0046] If the GTS-800 motion controller output enable signal is lost unexpectedly, the light-emitting diode of the photoelectric coupler is immediately turned on, quickly pulling down the level of the ultraviolet laser interface, and the ultraviolet laser cannot sense the level and immediately stops emitting light, and this state is stably maintained until the output of the GTS-800 motion controller is restored, thereby avoiding the phenomenon of accidental light emission of the laser caused by no signal.

[0047] By using an oscilloscope, the response time from the GTS-800 motion controller output enable signal to the closing of the drain output of the photoelectric coupler and the response time from the GTS-800 motion controller stopping output enable signal to the opening of the drain output of the photoelectric coupler are detected respectively. It can be measured that all the response times are <170us.

[0048] Embodiment 2

[0049] As shown in Figure 2 The embodiment provides a laser control circuit based on multiple interfaces and multiple levels, which comprises:

[0050] A motion control module is configured to generate an enable signal.

[0051] A selection switching module is connected with the motion control module and is configured to perform selection switching from one channel to multiple channels, and a physical jumper wire is used to realize signal gating of multiple lasers in a laser module, so that the voltage drop of a power supply is reduced.

[0052] A photoelectric coupling isolation module is connected with an output end of the selection switching module and an output end of another selection switching module, and is configured to realize electrical isolation and level conversion.

[0053] A laser module comprises at least two lasers with different working levels, and each laser is connected with a corresponding output port of the another selection switching module; when the signal output by the motion control module is incorrect or uncertain, the laser can be ensured to be in a non-light-emitting state.

[0054] The preferred embodiment of the utility model is described in detail above with reference to the drawings, but the utility model is not limited to the specific details in the above embodiment, and various simple modifications can be made to the technical scheme of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model.

[0055] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the utility model will not describe various possible combination manners.

[0056] In addition, various different embodiments of the present application can be combined arbitrarily, as long as they do not violate the spirit of the present application, and should be considered as disclosed by the present application.

Claims

1. A laser control circuit based on multiple interfaces and multiple levels, characterized in that, include: The motion control module is used to generate enable signals; The selection switching module is connected to the motion control module, and the signal selection of multiple lasers in the laser module is realized by physical jumper wires. An optocoupler isolation module has its input end connected to the output end of the selection switching module and its output end connected to the laser module, used to achieve electrical isolation and level conversion; The laser module includes at least two lasers with different operating levels, and each laser is connected to the corresponding output port of the optocoupler isolation module.

2. The laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, The motion control module consists of a motion controller and a terminal board. The motion controller is connected to the terminal board, the power input terminal of the terminal board is connected to the power module, and the output terminal of the terminal board is connected to the input terminal of the optocoupler module.

3. The laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, The selection switching module includes square pin groups arranged in a matrix, with a laser type identifier next to each group of pins.

4. A laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, The optocoupler isolation module consists of an optocoupler and a resistor array, with the resistor array located on the output side of the optocoupler.

5. A laser control circuit based on multiple interfaces and multiple levels as described in claim 2, characterized in that, The optocoupler module includes three output ports: a current control interface, a level control interface, and an open-drain control interface. The current control interface is used to drive a current-controlled laser with an output current range of 6–10 mA. The level control interface is used to drive a level-controlled laser. The open-drain control interface is used for switching control of the open-drain laser and is compatible with 3.3V, 5V, and 24V voltage inputs.

6. A laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, The laser module includes an ultraviolet laser and an infrared laser. The ultraviolet laser is connected to the open-drain control interface of the optocoupler module, and the infrared laser is connected to the current control interface and the level control interface of the optocoupler module.

7. A laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, A selection switching module is also provided between the optocoupler isolation module and the laser module. When the signal output by the motion control module is incorrect or uncertain, it can ensure that the laser is not emitting light.

8. A laser control circuit based on multiple interfaces and multiple levels as described in claim 1, characterized in that, The laser control circuit also includes a power supply module, which provides power to the motion control module, the selection switching module, and the optocoupler isolation module.

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