Delay self-cut-off lamp test circuit

Abstract

The utility model provides a time-delay automatic light-off test circuit, which comprises a light test switch module, a general control relay module connected with the output end of the light test switch module, and a tested light switch group module and a sub-control relay module which are respectively connected with the output end of the general control relay module, the tested state indicating lamp group module is connected with the output end of the sub-control relay module; the lamp test switch module is a non-self-locking switch S2, the master control relay module is a delay relay K1, the sub-control relay module is an electromagnetic relay K2, the tested lamp switch group module is a restart switch S3, and the tested state indicator lamp group module comprises a working indicator lamp H1 and a state indicator lamp H2. According to the utility model, the problem of transient flash and transient extinguishing of a response device at the rear end of the circuit caused by non-standard operation when a lamp test switch is frequently and quickly connected or disconnected is solved, the automatic recovery enables the test process to be more convenient and efficient, and the stability of the circuit is improved.

Description

Technical Field

[0001] The utility model belongs to the field of lamp testing, and in particular relates to a time-delayed automatic-off lamp testing circuit. Background Art

[0002] The panel operation and indicator devices in traditional human-computer interaction display and control equipment have diverse layout positions and numerous peripheral circuits and devices, which makes test accessibility poor and requires numerous disassembly and assembly processes. Moreover, the initial status confirmation and monitoring operations after the integration of multiple devices and systems are more cumbersome, the test difficulty index increases, and the problems of detection procedures and low efficiency are further highlighted, which greatly affects the human-computer interaction experience of the product.

[0003] In order to solve the problem of poor test accessibility, a Chinese patent with publication number CN220064330U discloses a one-button test circuit for an indicator light; it includes a host, a test switch S2, a first relay K1, a second relay K2, and a third relay K3. The utility model completes the rapid self-test and status confirmation of the panel indicator light device, and ensures the status integrity confirmation of the human-computer interaction product before the task interface starts, but has the following defects: 1) After each "light test" operation, the "light test" switch needs to be manually disconnected and restored, which reduces the automation degree of the "light test"; 2) When the "light test" is quickly performed, the "light test" switch will face the dilemma of instantaneous on and off, causing the "light test" switch itself, such as switch components, indicator devices, etc., to produce cumulative losses, and even cause device failure in severe cases; 3) The instantaneous on and off of the "light test" switch may cause the "tested light switch group" and "tested status light group" at the back end of the test circuit to flash and turn off, causing certain identification problems, and in severe cases affecting the comprehensive use efficiency of the device. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a time-delayed automatic lamp-off testing circuit.

[0005] The utility model is realized through the following technical solutions.

[0006] A time-delayed automatic light-off test circuit comprises a light test switch module, a master control relay module connected to the output end of the light test switch module, a tested light switch group module and a sub-control relay module respectively connected to the output end of the master control relay module, and a tested status indicator light group module connected to the output end of the sub-control relay module, wherein the input end of the light test switch module is connected to a power supply module, and the tested light switch group module and the tested status indicator light group module are respectively connected to a display and control device.

[0007] The light test switch module includes a non-self-locking switch S2, which includes multiple normally open contacts and multiple normally closed contacts. One end of the two normally open contacts is connected to the main control relay module as an instantaneous control signal output end, the other end of one of the normally open contacts is connected to one end of the test switch indicator light, and the other end of the other normally open contact is connected to the positive pole of the 27V power supply. The normally closed contact is vacant, and the other end of the test switch indicator light is connected to the 27V power supply ground.

[0008] The master control relay module includes a delay relay K1, and the normally open contacts, coils and one end of the sliding rheostat of the multi-way contacts of the delay relay K1 are all connected to the instantaneous control signal output end of the non-self-locking switch S2, the moving contact of the first contact is connected to the tested lighted switch group module, the moving contact of the second contact is connected to the sub-control relay module, and the other end of the coil and the sliding rheostat is connected to the 27V power supply ground.

[0009] The tested lighted switch group module includes a restart switch S3, which includes multiple normally open contacts and multiple normally closed contacts. The first normally open contact serves as the restart switch of the display and control device, one end of the second normally open contact is connected to the positive pole of the 27V power supply, one end of the first normally closed contact is connected to the moving contact of the first contact of the delay relay K1, and the other end and the other end of the second normally open contact are connected to the 27V power supply ground through the restart indicator light.

[0010] The sub-control relay module includes an electromagnetic relay K2, the positive pole of the coil of the electromagnetic relay K2 and the normally open contacts of its multi-way contacts are connected to the moving contacts of the second contact of the delay relay K1, the moving contacts of the multi-way contacts are connected to the measured status indicator light group module, the normally closed contacts of the first contact are connected to the positive pole of the working power supply of the display and control device, the normally closed contacts of the second contact are connected to the working power supply signal ground of the display and control device, the normally closed contacts of the third contact are connected to the positive pole of the status indication power supply of the display and control device, the normally closed contacts of the fourth contact are connected to the status indication power supply signal ground of the display and control device, and the negative pole of the coil is connected to the 27V power supply ground.

[0011] The tested status indicator light group module includes a working indicator light H1 and a status indicator light H2, wherein the positive pole of the working indicator light H1 is connected to the moving contact of the first contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the second contact, and the positive pole of the status indicator light H2 is connected to the moving contact of the third contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the fourth contact.

[0012] The beneficial effects of the utility model are:

[0013] 1. The light test switch module uses a non-self-locking switch S2 as the "light test" switch. The "light test" switch will automatically reset and disconnect after each on operation, without the need for additional manual recovery operations. The duration of the signal each time the "light test" switch is on is determined by the inherent properties of the switch, solving the problem of instant on and instant off of the "light test" switch.

[0014] 2. The time delay relay K1 is used as the master control relay. Through its function of "delaying 0.1s to 180s to cut off the output after power failure", the technical effect of continuous output, timed response, and delayed switching and automatic disconnection of the control signal output is achieved;

[0015] 3. The electromagnetic relay K2 of the sub-control relay module uses the delayed signal output of the delay relay K1 as input to drive the lighting test of the working indicator light H1 and the status indicator light H2 of the display and control equipment, and uses another delayed signal from the delay relay K1 to drive the lighting test of the illuminated switch device of the display and control equipment. After the test is completed, the "light test" switch automatically returns to its original position.

[0016] In summary, the utility model solves the problem of instantaneous on and off of the "light test" switch during rapid detection, and also solves the problem of instantaneous flashing and off of the back-end response device of the circuit due to irregular operation when the "light test" switch is frequently and quickly connected / disconnected. In addition, the "light test" switch does not require manual recovery operation after being connected, making the test process more convenient and efficient, and improving the stability of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural block diagram of the time-delayed automatic light-off test circuit of the utility model;

[0018] Figure 2 It is the principle diagram of the time-delayed automatic light-off test circuit of the utility model;

[0019] Figure 3 This is a delay control mechanism diagram of the delay relay K1 of the utility model. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments, but the scope of protection required is not limited to the description.

[0021] like Figure 1The figure shows a structural block diagram of a delayed automatic light-off test circuit of the utility model, which includes a light test switch module, a master control relay module connected to the output end of the light test switch module, a tested light switch group module and a sub-control relay module respectively connected to the output end of the master control relay module, a tested status indicator light group module connected to the output end of the sub-control relay module, the input end of the light test switch module is connected to a power supply module, and the tested light switch group module and the tested status indicator light group module are respectively connected to a display and control device.

[0022] like Figure 2 The figure shows the principle diagram of the time-delayed self-off lamp test circuit of the utility model; the lamp test switch module includes a non-self-locking switch S2, and the non-self-locking switch S2 includes a plurality of normally open contacts and a plurality of normally closed contacts, one end of the two normally open contacts is connected to the master control relay module as an instantaneous control signal output end, the other end of one of the normally open contacts is connected to one end of the test switch indicator light, the other end of the other normally open contact is connected to the positive pole of the 27V power supply, the normally closed contact is vacant, and the other end of the test switch indicator light is connected to the 27V power supply ground;

[0023] The use of a non-self-locking switch S2 reduces the stacking structure of the "light test" switch using a self-locking switch; the non-self-locking switch S2 is only used for switching signal output and self-control detection, and is not used as a light test load device. It has a high derating factor and a stable switching condition, and will not easily cause performance degradation or device damage.

[0024] The master control relay module includes a time delay relay K1, the normally open contacts of the multi-way contacts of the time delay relay K1, the coil and one end of the sliding rheostat are all connected to the instantaneous control signal output end of the non-self-locking switch S2, the moving contact of the first contact is connected to the tested light switch group module, the moving contact of the second contact is connected to the sub-control relay module, and the other end of the coil and the sliding rheostat is connected to the 27V power supply ground;

[0025] like Figure 3 The figure shows the delay control mechanism diagram of the delay relay K1 of the utility model. The test signal sent by the "light test" switch is converted into a timing test signal which is valid for 3 seconds after disconnection through the "delay relay" and forwarded out, thereby changing the locking form of the "light test" switch and reducing the stacking structure of the "light test" switch, so as to achieve online delayed self-break test detection of the status of other tested lighted push button switches and panel indicator lights in the display and control equipment.

[0026] The tested lighted switch group module includes a restart switch S3, which includes a plurality of normally open contacts and a plurality of normally closed contacts. The first normally open contact serves as a restart switch for the display and control device, one end of the second normally open contact is connected to the positive electrode of the 27V power supply, one end of the first normally closed contact is connected to the moving contact of the first contact of the delay relay K1, and the other end and the other end of the second normally open contact are connected to the 27V power supply ground through the restart indicator light;

[0027] The restart switch S3 is used for signal switching control and status indication.

[0028] The sub-control relay module includes an electromagnetic relay K2, the positive pole of the coil of the electromagnetic relay K2 and the normally open contact of its multi-way contact are both connected to the moving contact of the second contact of the delay relay K1, the moving contact of the multi-way contact is connected to the module of the measured status indicator light group, the normally closed contact of the first contact is connected to the positive pole of the working power supply of the display and control device, the normally closed contact of the second contact is connected to the working power supply signal ground of the display and control device, the normally closed contact of the third contact is connected to the positive pole of the status indication power supply of the display and control device, the normally closed contact of the fourth contact is connected to the status indication power supply signal ground of the display and control device, and the negative pole of the coil is connected to the 27V power supply ground;

[0029] The electromagnetic relay K2 uses the delayed signal output of the delay relay K1 as input to drive the lighting test of the working indicator light H1 and the status indicator light H2 of the display and control device.

[0030] The tested status indicator light group module includes a working indicator light H1 and a status indicator light H2, wherein the positive pole of the working indicator light H1 is connected to the moving contact of the first contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the second contact, and the positive pole of the status indicator light H2 is connected to the moving contact of the third contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the fourth contact;

[0031] The working indicator light H1 and the status indicator light H2 are used to display the real-time working conditions of the component units in the display and control device.

[0032] The working principle and beneficial effects of the utility model are as follows: the instantaneous control signal output by the non-self-locking switch S2 is converted into a timing test signal which is valid for 3s after being disconnected through the "delay relay K1" and is output to the normally closed contact of the delay relay K1, that is, when the non-self-locking switch S2 on the device panel of the display and control device is pressed, the +27V "light test" DC signal is transmitted to the coil magnetic package of the "delay relay K1", and the +27V "light test" DC signal is stopped after the non-self-locking switch S2 is released, and the non-self-locking switch S2 is automatically reset, and the "delay relay K1" outputs a +27V delayed self-disconnection test signal which lasts for about 3s to the tested lighted switch The tested group of lighted switches is the restart switch S3; another self-off delay signal is output to the tested status indicator light group via the electromagnetic relay K2; then all the tested indicator lights are continuously lit for about 3s and then automatically restored to the real-time status of the product, and the single "light test" process is ended; the online delayed self-off test detection of the status of other tested lighted push button switches and panel indicator lights in the display and control equipment is realized, which solves the problem of the instantaneous flashing and extinguishing of the circuit back-end response device due to irregular operation when the "light test" switch is frequently and quickly connected or disconnected, and there is no need for manual recovery operation, making the test process more convenient and efficient, and improving the stability of the circuit.

Claims

1. A time-delayed automatic lamp-off test circuit, characterized in that: It includes a light test switch module, a master control relay module connected to the output end of the light test switch module, a tested light switch group module and a sub-control relay module respectively connected to the output end of the master control relay module, and a tested status indicator light group module connected to the output end of the sub-control relay module. The input end of the light test switch module is connected to a power supply module, and the tested light switch group module and the tested status indicator light group module are respectively connected to a display and control device.

2. A time-delayed automatic lamp-off test circuit as claimed in claim 1, characterized in that: The light test switch module includes a non-self-locking switch S2, which includes multiple normally open contacts and multiple normally closed contacts. One end of the two normally open contacts is connected to the main control relay module as an instantaneous control signal output end, the other end of one of the normally open contacts is connected to one end of the test switch indicator light, and the other end of the other normally open contact is connected to the positive pole of the 27V power supply. The normally closed contact is vacant, and the other end of the test switch indicator light is connected to the 27V power supply ground.

3. A time-delayed automatic lamp-off test circuit as claimed in claim 1, characterized in that: The master control relay module includes a delay relay K1, and the normally open contacts, coils and one end of the sliding rheostat of the multi-way contacts of the delay relay K1 are all connected to the instantaneous control signal output end of the non-self-locking switch S2, the moving contact of the first contact is connected to the tested lighted switch group module, the moving contact of the second contact is connected to the sub-control relay module, and the other end of the coil and the sliding rheostat is connected to the 27V power supply ground.

4. A time-delayed automatic lamp-off test circuit as claimed in claim 1, characterized in that: The tested lighted switch group module includes a restart switch S3, which includes multiple normally open contacts and multiple normally closed contacts. The first normally open contact serves as the restart switch of the display and control device, one end of the second normally open contact is connected to the positive pole of the 27V power supply, one end of the first normally closed contact is connected to the moving contact of the first contact of the delay relay K1, and the other end and the other end of the second normally open contact are connected to the 27V power supply ground through the restart indicator light.

5. A time-delayed automatic lamp-off test circuit as claimed in claim 1, characterized in that: The sub-control relay module includes an electromagnetic relay K2, the positive pole of the coil of the electromagnetic relay K2 and the normally open contacts of its multi-way contacts are connected to the moving contacts of the second contact of the delay relay K1, the moving contacts of the multi-way contacts are connected to the measured status indicator light group module, the normally closed contacts of the first contact are connected to the positive pole of the working power supply of the display and control device, the normally closed contacts of the second contact are connected to the working power supply signal ground of the display and control device, the normally closed contacts of the third contact are connected to the positive pole of the status indication power supply of the display and control device, the normally closed contacts of the fourth contact are connected to the status indication power supply signal ground of the display and control device, and the negative pole of the coil is connected to the 27V power supply ground.

6. A time-delayed automatic lamp-off test circuit as claimed in claim 1, characterized in that: The tested status indicator light group module includes a working indicator light H1 and a status indicator light H2, wherein the positive pole of the working indicator light H1 is connected to the moving contact of the first contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the second contact, and the positive pole of the status indicator light H2 is connected to the moving contact of the third contact of the electromagnetic relay K2, and the negative pole is connected to the moving contact of the fourth contact.

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