A proximity switch output type identification device and identification method thereof

Abstract

The present invention provides a proximity switch output type identification device and an identification method thereof. The former includes an electric control box, a display screen, a power switch button, a reset button, a spring terminal block, and a test button. The electric control box is provided with an AC / DC switching power supply, a programmable controller, and two intermediate relays. One end of the power switch button is connected to an external power supply, and the AC / DC switching power supply and the programmable controller are electrically connected to the other end of the power switch button respectively; the test button is used to contact the detection surface of the proximity switch to be tested; the spring terminal block includes a 24V terminal, a 0V terminal, and an output terminal; the 24V terminal and the 0V terminal are electrically connected to the DC terminal of the AC / DC switching power supply respectively; the output terminal is electrically connected to a control circuit; the reset button, the output end of the control circuit, and the test button are electrically connected to the programmable controller respectively; the display screen is connected to the programmable controller for communication. The present invention enables detection personnel to independently and quickly complete the identification of the output type of the proximity switch.

Description

Technical Field

[0001] The present invention belongs to the technical field of switch output type identification equipment, and in particular relates to a proximity switch output type identification equipment and an identification method thereof. Background Art

[0002] There are many types of proximity switches used in cigarette packaging equipment, and they are frequently replaced. When replacing or testing a proximity switch, the output type of the proximity switch must be confirmed, including whether it is NPN or PNP, and whether it is normally open or normally closed. Two people are required to cooperate during the confirmation, one to adjust the distance between the sensor and the object being measured, and one to use a multimeter to measure the output voltage of the proximity switch. Usually, one person cannot complete the type classification independently, and the inspection personnel need to have professional theoretical knowledge to make judgments based on the output results, and then identify the type of proximity switch, which is time-consuming and not conducive to ensuring the efficiency of cigarette packaging equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a proximity switch output type identification device to solve the above technical problems in the prior art, so that the detection personnel can complete the identification of the proximity switch output type independently and quickly. Another purpose of the present invention is to provide a proximity switch output type identification method.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A proximity switch output type identification device comprises an electric control box, a display screen arranged on the housing of the electric control box, a power switch button, a reset button, a spring terminal block, and a test button. An AC / DC switching power supply, a programmable controller, and two intermediate relays are arranged in the electric control box. One end of the power switch button is connected to an external power supply, and the AC / DC switching power supply and the controller are electrically connected to the other end of the power switch button respectively; the test button is used to contact the detection surface of the proximity switch to be tested; the spring terminal block comprises a 24V terminal and a 0V terminal for providing a 24V DC power supply to the proximity switch to be tested, and an output terminal for sending the output signal of the proximity switch to be tested into a control circuit composed of two intermediate relays; the 24V terminal and the 0V terminal are electrically connected to the DC terminal of the AC / DC switching power supply respectively; the output terminal is electrically connected to the control circuit; the reset button, the output end of the control circuit, and the test button are electrically connected to the programmable controller respectively, and the display screen is communicatively connected to the programmable controller.

[0006] Preferably, the housing of the electric control box is also provided with an electric control box door switch knob for opening or closing the electric control box.

[0007] Preferably, the switch knob of the electric control box door is a metal structure.

[0008] Preferably, the 24V terminal, the 0V terminal and the output terminal are crimping terminals of three different colors.

[0009] Preferably, the test button is a normally open self-reset button with an indicator light.

[0010] Preferably, the power switch button is a normally open self-locking button with an indicator light.

[0011] A method for identifying an output type of a proximity switch comprises the following steps:

[0012] Insert the three-wire plug of the proximity switch output type identification device described in any one of the above items into a grounded 220V three-hole socket, turn on the 220V power supply, press the power switch button, and crimp the power line and output line of the proximity switch to be tested to the 24V terminal, 0V terminal, and output terminal of the spring terminal block respectively;

[0013] Repeatedly press and release the test button three times through the detection surface of the proximity switch under test, wherein: the time interval between pressing and releasing needs to be greater than 0.5s, and when the test button is pressed, the indicator light of the test point is lit as a basis, and when releasing, the distance between the detection surface of the proximity switch under test and the test button must be greater than 5cm;

[0014] The output signal of the proximity switch to be tested is input into the control circuit composed of the two intermediate relays through the output terminal. Through the control circuit composed of the two intermediate relays in the control box, it is first determined whether the proximity switch to be tested is an NPN type or a PNP type, and then the determination result is transmitted to the designated input terminal of the programmable controller;

[0015] When the detection surface of the proximity switch under test is pressed down and leaves the test button, the on / off state of the test button is transmitted to another input terminal of the programmable controller as an input signal. The input signals in the two input terminals are compared and calculated by the control program written in the programmable controller to determine whether the proximity switch under test is normally open or normally closed.

[0016] The programmable controller displays the identification results on the display screen for the inspectors to read and record;

[0017] Press the reset button, press the power switch button, and unplug the three-wire plug.

[0018] Preferably, the programmable controller transmits the recognition result to the display screen via a network communication protocol.

[0019] The beneficial effects of the present invention are:

[0020] The proximity switch output type identification device of the present invention only needs to press the power line and the output line of the proximity switch to be tested to the corresponding interface of the spring terminal block respectively, and then repeatedly press and release the test button 3 times through the detection surface of the proximity switch to be tested, and then the output type of the proximity switch to be tested can be identified by the programmable controller and displayed on the display screen for the detection personnel to read and record. It can be seen that the proximity switch output type identification device of the present invention can enable the detection personnel to independently and quickly complete the identification of the proximity switch output type, and can also instantly display the output type of the proximity switch through the display screen, which greatly reduces the requirements for the professional theoretical knowledge of the detection personnel and improves the maintenance efficiency of the cigarette packaging equipment.

[0021] The proximity switch output type identification method of the present invention also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present invention in detail in conjunction with the drawings, wherein

[0023] Figure 1 A connection diagram of a proximity switch output type identification device provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a control circuit consisting of two intermediate relays provided in an embodiment of the present invention.

[0025] Markings in the accompanying drawings:

[0026] 1. Test button 2. Proximity switch to be tested 3. Spring terminal block 4. Control circuit

[0027] 5. Reset button 6. Programmable controller 7. Display screen

[0028] J1, intermediate relay J2, intermediate relay DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the solution will be further described in detail below in conjunction with specific embodiments.

[0030] like Figure 1 and Figure 2As shown, an output type identification device for a proximity switch provided by an embodiment of the present invention comprises an electric control box, a display screen 7 arranged on a housing of the electric control box, a power switch button, a reset button 5, a spring terminal block 3, and a test button 1. An AC / DC switching power supply, a programmable controller 6, and two intermediate relays J1 and J2 are arranged in the electric control box. One end of the power switch button is connected to an external power supply, and the AC / DC switching power supply and the programmable controller 6 are electrically connected to the other end of the power switch button, respectively; the test button 1 is used to contact the detection surface of the proximity switch 2 to be tested; the spring terminal block 3 comprises a 24V terminal and a 0V terminal for providing a 24V DC power supply to the proximity switch 2 to be tested, and an output terminal for sending the output signal of the proximity switch 2 to the control circuit 4 composed of the two intermediate relays; the 24V terminal and the 0V terminal are electrically connected to the DC terminal of the AC / DC switching power supply, respectively; the output terminal is electrically connected to the control circuit 4; the reset button 5, the output end of the control circuit 4, and the test button 1 are electrically connected to the programmable controller 6, respectively, and the display screen 7 is communicatively connected to the programmable controller 6. It is understandable that the communication connection between the display screen and the programmable controller can be achieved through a network communication protocol.

[0031] The proximity switch output type identification device provided by the embodiment of the present invention only needs to press the power line and the output line of the proximity switch 2 to be tested to the corresponding interfaces of the spring terminal block 3 respectively, and then repeatedly press and release the test button 3 times through the detection surface of the proximity switch 2 to be tested, so that the output type of the proximity switch 2 to be tested can be identified by the programmable controller 6 and displayed on the display screen 7 for the detection personnel to read and record. It can be seen that the proximity switch output type identification device of the present invention can enable the detection personnel to independently and quickly complete the identification of the proximity switch output type, and can also instantly display the output type of the proximity switch through the display screen, which greatly reduces the requirements for the professional theoretical knowledge of the detection personnel and improves the maintenance efficiency of the cigarette packaging equipment.

[0032] Furthermore, a control box door switch knob for opening or closing the control box is also provided on the housing of the control box, so as to control the opening and closing of the control box.

[0033] Preferably, the electric control box door switch knob is a metal structure so that the service life of the electric control box door switch button is longer.

[0034] Specifically, the 24V terminal, the 0V terminal, and the output terminal are three crimping terminals of different colors, so that the proximity switch to be tested can be connected to each terminal separately to avoid installation errors.

[0035] Furthermore, the test button is a normally open self-reset button with an indicator light.

[0036] Preferably, the power switch button is a normally open self-locking button with an indicator light. Of course, the reset button can also be a normally open self-reset button with an indicator light.

[0037] The present invention also provides a method for identifying the output type of a proximity switch, which comprises the following steps:

[0038] Insert the three-wire plug of the proximity switch output type identification device described in any one of the above items into a grounded 220V three-hole socket, turn on the 220V power supply, press the power switch button, and crimp the power line and output line of the proximity switch 2 to be tested to the 24V terminal, 0V terminal, and output terminal of the spring terminal block 3 respectively;

[0039] Repeatedly press and release the test button 3 times through the detection surface of the proximity switch 2 under test, wherein: the time interval between pressing and releasing needs to be greater than 0.5s, when the proximity switch 2 under test presses the test button 1, the indicator light of the test point is lit as a basis, and when releasing, the distance between the detection surface of the proximity switch 2 under test and the test button 1 must be greater than 5cm;

[0040] The output signal of the proximity switch 2 to be tested is input into the control circuit 4 composed of the two intermediate relays through the output terminal. Through the control circuit composed of the two intermediate relays in the control box, it is first determined whether the proximity switch to be tested is NPN type or PNP type, and then the determination result is transmitted to the designated input terminal of the programmable controller. Figure 2 As shown, in a specific embodiment, when the proximity switch 2 to be tested is of NPN type, its output is 0V, the coil of the intermediate relay J1 is energized, the normally closed contact of the intermediate relay J1 is disconnected, and the interlocking function with the intermediate relay J2 is realized, the normally open contact of the intermediate relay J1 is closed, and the 24V signal is sent to the input terminal A of the programmable controller 6; when the proximity switch 2 to be tested is of PNP type, its output is 24V, the coil of the intermediate relay J2 is energized, the normally closed contact of the intermediate relay J2 is disconnected, and the interlocking function with the intermediate relay J1 is realized, the normally open contact of the intermediate relay J2 is closed, and the 24V signal is sent to the input terminal B of the programmable controller 6; wherein, the input terminal A and the input terminal B are both designated input terminals.

[0041] When the detection surface of the proximity switch 2 under test is pressed down and leaves the test button, the on-off state of the test button 1 is transmitted to another input terminal of the programmable controller 6 as an input signal, which can be recorded as input terminal C. The input signals in the two input terminals are compared and calculated by the control program written in the programmable controller 6:

[0042] When the XOR logic operation result of input terminal A and input terminal C is 0, it is an NPN normally open proximity switch;

[0043] When the XOR logic operation result of input terminal A and input terminal C is 1, it is an NPN normally closed proximity switch;

[0044] When the XOR logic operation result of input terminal B and input terminal C is 0, it is a PNP normally open proximity switch;

[0045] When the XOR logic operation result of input terminal B and input terminal C is 1, it is a PNP normally closed proximity switch.

[0046] The programmable controller 6 displays the recognition result on the display screen 7 through the network communication protocol for the inspection personnel to read and record;

[0047] Press the reset button 5 to reset the programmable controller 6 and the display screen 7 to end the current measurement so as to start the next measurement;

[0048] Press the power switch button and unplug the three-wire plug to turn off the device.

[0049] The proximity switch output type identification device provided by the embodiment of the present invention realizes single-person and rapid identification of proximity switches commonly used in cigarette packaging equipment, improves the maintenance efficiency of the cigarette packaging equipment, and reduces the maintenance manpower cost.

[0050] The above are only preferred embodiments of the present invention. It should be pointed out that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, after reading the contents of the present invention, relevant technical personnel in the field may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A proximity switch output type identification device, characterized in that: It comprises an electric control box, a display screen arranged on the housing of the electric control box, a power switch button, a reset button, a spring terminal block, and a test button. The electric control box is provided with an AC / DC switching power supply, a programmable controller, and two intermediate relays. One end of the power switch button is connected to an external power supply, and the AC / DC switching power supply and the programmable controller are electrically connected to the other end of the power switch button respectively; the test button is used to contact the detection surface of the proximity switch to be tested; the spring terminal block comprises a 24V terminal and a 0V terminal for providing a 24V DC power supply to the proximity switch to be tested, and an output terminal for sending the output signal of the proximity switch to be tested into a control circuit composed of two intermediate relays; the 24V terminal and the 0V terminal are electrically connected to the DC terminal of the AC / DC switching power supply respectively; the output terminal is electrically connected to the control circuit; the reset button, the output end of the control circuit, and the test button are electrically connected to the programmable controller respectively; the display screen is in communication connection with the programmable controller; The housing of the electric control box is also provided with an electric control box door switch knob for opening or closing the electric control box; The 24V terminal, the 0V terminal, and the output terminal are three crimping terminals of different colors.

2. The proximity switch output type identification device according to claim 1, characterized in that: The switch knob of the electric control box door is a metal structure.

3. The proximity switch output type identification device according to claim 1, characterized in that: The test button is a normally open self-resetting button with an indicator light.

4. The proximity switch output type identification device according to claim 1, characterized in that: The power switch button is a normally open self-locking button with an indicator light.

5. A method for identifying the output type of a proximity switch, characterized in that: It includes the following steps: Insert the three-wire plug of the proximity switch output type identification device according to any one of claims 1 to 4 into a grounded 220V three-hole socket, turn on the 220V power supply, press the power switch button, and crimp the power line and output line of the proximity switch to be tested to the 24V terminal, 0V terminal, and output terminal of the spring terminal block respectively; Repeatedly press and release the test button three times through the detection surface of the proximity switch under test, wherein: the time interval between pressing and releasing needs to be greater than 0.5s, and when the test button is pressed, the indicator light of the test point is lit as a basis, and when releasing, the distance between the detection surface of the proximity switch under test and the test button must be greater than 5cm; The output signal of the proximity switch to be tested is input into the control circuit composed of the two intermediate relays through the output terminal. Through the control circuit composed of the two intermediate relays in the control box, it is first determined whether the proximity switch to be tested is an NPN type or a PNP type, and then the determination result is transmitted to the designated input terminal of the programmable controller; When the detection surface of the proximity switch under test is pressed down and leaves the test button, the on / off state of the test button is transmitted to another input terminal of the programmable controller as an input signal. The input signals in the two input terminals are compared and calculated by the control program written in the programmable controller to determine whether the proximity switch under test is normally open or normally closed. The programmable controller displays the identification results on the display screen for the inspectors to read and record; Press the reset button, press the power switch button, and unplug the three-wire plug.

6. The method for identifying the output type of a proximity switch according to claim 5, characterized in that: The programmable controller transmits the recognition result to the display screen through a network communication protocol.

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