An automatic test circuit

Abstract

The utility model discloses an automatic test circuit, including a power module, a first relay module, a second relay module, a temperature control module, and a load to be tested; the first end of the first relay module is electrically connected to the power module for accessing the power supply; the second end of the first relay module is electrically connected to the first end of the second relay module and the first end of the temperature control module respectively for controlling the entire test duration; the second end of the second relay module is electrically connected to the load to be tested for cycling the power on and off of the load to be tested during the test, and keeping the load to be tested in the power-on state when the bad problem is reproduced. By implementing the utility model, the AC power on and off time can be set according to the bad problem of the product, so that the random power on stuck, restart, abnormal drawing and other problems of the load to be tested can be reproduced efficiently and quickly, thereby improving production efficiency and ensuring product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of product testing, in particular to an automatic testing circuit. Background Art

[0002] Televisions are one of the essential electrical appliances in a household. However, during the manufacturing process, televisions may randomly freeze, restart, or display abnormalities. It is difficult to reproduce the defective phenomenon caused by AC power failure. During the analysis process, the machine needs to be manually turned on and off to reproduce the defective phenomenon in order to analyze the product defective phenomenon, which consumes a lot of time and reduces production efficiency. Summary of the invention

[0003] In the prior art, during the manufacturing process of televisions, undesirable phenomena such as random startup freezing occur, and manual AC power on and off is required to reproduce the problem, which reduces production efficiency.

[0004] In view of the above problems, an automatic test circuit is proposed. A first relay module is set in the test circuit to control the entire test duration. A second relay module is set during the test to cycle the power on and off of the load under test, and when the bad problem is reproduced, the load under test is kept in the on state. By cycling the power on and off time within the set time, the power is automatically turned on and off to reproduce the bad phenomena such as random startup freeze, restart, and abnormal picture of the TV. By setting a temperature control module, the TV is heated in the use environment, the working environment temperature of the TV is increased, the aging of the TV is accelerated, and the bad phenomenon is exposed in advance. The automatic test circuit in this application can replace the existing manual AC switch to efficiently and quickly reproduce bad phenomena, improve the efficiency of analyzing bad problems of the TV, speed up the product launch progress, and ensure product quality.

[0005] An automatic testing circuit, comprising:

[0006] Power module;

[0007] A first relay module;

[0008] A second relay module;

[0009] Temperature control module;

[0010] The load being measured;

[0011] The first end of the first relay module is electrically connected to the power module for connecting to a power source;

[0012] The second end of the first relay module is electrically connected to the first end of the second relay module and the first end of the temperature control module, respectively, for controlling the entire test duration;

[0013] The second end of the second relay module is electrically connected to the load under test, and is used to cycle the power on and off of the load under test during the test, and to keep the load under test in the power-on state when a defect is reproduced.

[0014] In combination with the automatic test circuit described in the utility model, in a first possible implementation manner, the power module includes:

[0015] AC power supply;

[0016] Air switch;

[0017] The AC power supply is electrically connected to the air switch;

[0018] The AC power supply supplies power to the entire test circuit through the air switch.

[0019] In combination with the first possible implementation manner of the utility model, in a second possible implementation manner, the first relay module includes a first time relay;

[0020] The first time relay comprises:

[0021] A first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact, a seventh contact and an eighth contact;

[0022] The second contact and the seventh contact are electrically connected to the first output contact and the second output contact of the air switch respectively;

[0023] The seventh contact point is short-circuited with the eighth contact point.

[0024] In combination with the second possible implementation manner of the utility model, in a third possible implementation manner, the second relay module includes:

[0025] Pause switch;

[0026] Second time relay;

[0027] The second time relay comprises:

[0028] a ninth contact, a tenth contact, an eleventh contact, a twelfth contact, a thirteenth contact, a fourteenth contact, a fifteenth contact, and a sixteenth contact;

[0029] The pause switch is connected in series between the ninth contact and the twelfth contact, and the fifteenth contact and the sixteenth contact are short-circuited;

[0030] The fifth contact is electrically connected to the fifteenth contact, and the second contact is electrically connected to the tenth contact.

[0031] In combination with the third possible implementation manner of the utility model, in a fourth possible implementation manner, the thirteenth contact is electrically connected to the first input terminal of the load under test, and the tenth contact is electrically connected to the second input terminal of the load under test.

[0032] In combination with the second possible implementation manner of the present utility model, in a fifth possible implementation manner, the temperature control module includes:

[0033] Control unit;

[0034] Temperature measuring unit;

[0035] Heating unit;

[0036] The control unit is electrically connected to the temperature measuring unit and the heating unit respectively;

[0037] The first input end of the temperature control module is electrically connected to the second contact, and the second input end is electrically connected to the seventh contact.

[0038] In combination with the fifth possible implementation of the utility model, in a sixth possible implementation, the temperature control module further includes:

[0039] Control switch;

[0040] The control switch is electrically connected between the control unit and the heating unit.

[0041] In combination with the sixth possible implementation of the utility model, in a seventh possible implementation, the heating unit includes:

[0042] Electric fans and heating tubes;

[0043] The electric fan and the heating tube are connected in parallel in the output circuit of the temperature control module.

[0044] In combination with the seventh possible implementation of the present utility model, in an eighth possible implementation, the temperature control module further includes:

[0045] Setting unit and display unit;

[0046] The setting unit and the display unit are electrically connected to the control unit, and are used for setting the temperature and displaying the real-time temperature, respectively.

[0047] In conjunction with the automatic testing circuit of the present invention, in a ninth possible implementation manner, the load to be tested is a television.

[0048] The automatic test circuit described in the utility model is implemented by setting a first relay module in the test circuit to control the entire test duration, setting a second relay module during the test process to cycle the power on and off of the load under test, and keeping the load under test in the power-on state when the bad problem is reproduced. By cycling the power on and off time within the set time, the power is automatically turned on and off to reproduce the bad phenomena such as random startup freeze, restart, and abnormal picture of the TV. By setting a temperature control module, the TV is heated in the use environment, the working environment temperature of the TV is increased, the aging of the TV is accelerated, and the bad phenomenon is exposed in advance. The automatic test circuit in this application can replace the existing manual AC switch to efficiently and quickly reproduce bad phenomena, improve the efficiency of analyzing bad problems of the TV, speed up the product launch progress, and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 This is a schematic diagram of the connection of the automatic test circuit module in the utility model;

[0051] Figure 2 This is a circuit connection diagram of a specific embodiment of the automatic test circuit in the utility model;

[0052] Figure 3 It is a schematic diagram of the circuit connection of the temperature control module in the utility model. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0055] In the prior art, during the manufacturing process of televisions, undesirable phenomena such as random startup freezing occur, and manual AC power on and off is required to reproduce the problem, which reduces production efficiency.

[0056] In view of the above problems, an automatic testing circuit is proposed.

[0057] An automatic test circuit, such as Figure 1 , Figure 1 It is a schematic diagram of the connection of the automatic test circuit module in the utility model; including a power module 100, a first relay module 200, a second relay module 300, a temperature control module 400, and a load to be tested 500; the first end of the first relay module 200 is electrically connected to the power module 100 for connecting to the power supply; the second end of the first relay module 200 is electrically connected to the first end of the second relay module 300 and the first end of the temperature control module 400 respectively for controlling the entire test duration; the second end of the second relay module 300 is electrically connected to the load to be tested 500 for cycling the power on and off of the load to be tested 500 during the test process, and keeping the load to be tested 500 in the power-on state when the bad problem is reproduced. The first relay module is set in the test circuit to control the entire test duration, and the second relay module is set to cycle the power on and off of the load to be tested during the test process, and keep the load to be tested in the power-on state when the bad problem is reproduced. By cycling the power on and off within the set time, the power is automatically turned on and off to reproduce the TV's random startup freeze, restart, and abnormal picture. By setting a temperature control module, the TV is heated in the use environment to increase the TV's working environment temperature, accelerate the TV's aging, and expose the bad phenomenon in advance. The automatic test circuit in this application can replace the existing manual AC power on and off to efficiently and quickly reproduce the bad phenomenon, improve the efficiency of analyzing bad problems of the TV, speed up the product launch progress, and ensure product quality.

[0058] The 220V AC power supply supplies power to the time relay (KT1, KT2), ​​the temperature control module 400, the measured load 500 (TV) or other loads through the air switch K1.

[0059] Furthermore, if Figure 2 , Figure 2 It is a circuit connection diagram of a specific embodiment of the automatic test circuit in the utility model; the power module 100 includes an AC power supply 220V and an air switch K1; the AC power supply 220V supplies power to the entire test circuit through the air switch K1.

[0060] Furthermore, the first relay module 200 includes a first time relay KT1; the first time relay KT1 includes: a first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact, a seventh contact and an eighth contact; the second contact and the seventh contact are electrically connected to the first output contact and the second output contact of the air switch K1 respectively; the seventh contact is short-circuited with the eighth contact.

[0061] Furthermore, the second relay module 300 includes a pause switch K2 and a second time relay KT2; the second time relay KT2 includes: a ninth contact, a tenth contact, an eleventh contact, a twelfth contact, a thirteenth contact, a fourteenth contact, a fifteenth contact and a sixteenth contact; the pause switch K2 is connected in series between the ninth contact and the twelfth contact, and the fifteenth contact and the sixteenth contact are short-circuited; the fifth contact is electrically connected to the fifteenth contact, and the second contact is electrically connected to the tenth contact.

[0062] Further, the thirteenth contact is electrically connected to the first input terminal of the load 500 under test, and the tenth contact is electrically connected to the second input terminal of the load 500 under test.

[0063] like Figure 3 , Figure 3 It is a circuit connection diagram of the temperature control module 400 in the present invention. The temperature control module 400 includes a control unit, a temperature measuring unit, and a heating unit. The control unit is electrically connected to the temperature measuring unit and the heating unit, respectively. The first input terminal of the temperature control module 400 is electrically connected to the second contact, and the second input terminal is electrically connected to the seventh contact.

[0064] Furthermore, the temperature control module 400 also includes a control switch K3; the control switch K3 is electrically connected between the control unit and the heating unit.

[0065] Furthermore, the heating unit includes an electric fan and a heating tube; the electric fan and the heating tube are connected in parallel in the output circuit of the temperature control module 400.

[0066] Furthermore, the temperature control module 400 also includes: a setting unit and a display unit; the setting unit and the display unit are electrically connected to the control unit, and are used to set the temperature and display the real-time temperature, respectively.

[0067] Preferably, the load 500 to be measured is a television.

[0068] Connect 220V AC power to the L and N terminals of the air switch K1 input pins, and connect the time relays KT1, KT2, temperature control module 400 (digital temperature controller W1) and other loads from the output terminal of the air switch K1. Figure 2 , Figure 3 .

[0069] The temperature control module 400 (digital thermostat W1) detects the working environment temperature through the temperature measuring unit (temperature control probe), turns on the heating tube R and the electric fan F, accelerates the aging speed of the TV, and quickly reproduces the defect.

[0070] The automatic test principle in this application is as follows: the air switch K1 outputs 220VAC power to supply power to the temperature control module 400 (digital thermostat W1), the temperature control module 400 (digital thermostat W1) detects and displays the ambient temperature through the temperature measuring unit (temperature control probe), and the display unit can be used as a working environment temperature display; at the same time, a working environment temperature required by the TV is set through the setting unit, such as 35 to 40 degrees Celsius, the temperature measuring unit (temperature control probe) detects that the set temperature is within 35 to 40 degrees Celsius, the temperature control module 400 (digital thermostat W1) is turned on, and 220V power is output to supply power to the heating tube R and the electric fan F, the heating tube R and the electric fan F start to work and heat, and when the temperature measuring unit (temperature control probe) detects that the working temperature reaches the set temperature of 40 degrees Celsius, the control unit of the temperature control module 400 (digital thermostat W1) turns off the power supply, and the heating tube R and the electric fan F stop working; the control switch K3 can switch the temperature control module 400 (digital thermostat W1) according to actual test requirements.

[0071] The display unit may be an LCD screen, etc., and the setting unit may be a setting button, such as a button for adjusting the temperature.

[0072] The first time relay KT1 is used to set the TV simulation recurrence time. The load under test 400 (TV) or other load completes a whole cycle of simulation experiment time within this time;

[0073] The AC 220V power supply is output through the air switch K1 to supply power to the first time relay KT1. The first time relay KT1 displays digital time when it is working. The simulation experiment time of a cycle can be set through the first time relay KT1, such as 02H, 08H, 72H (hours), etc. This time can be set and displayed according to the actual situation. Within the set time, the fifth contact 5 and the eighth contact 8 of the first time relay KT1 module are connected to supply power to the second time relay KT2 and the load equipment at the back end. When the set time is exceeded, the fifth contact 5 and the eighth contact 8 of the first time relay KT1 module are disconnected to stop the power supply to the back end. Figure 2 .

[0074] The second time relay KT2 module is used to set the startup and shutdown cycle time and time pause of the TV to simulate the problem reproduction, so as to facilitate problem analysis.

[0075] The second contact 2 and the fifth contact 5 of the first time relay KT1 module supply power to the second time relay KT2 module. The second relay KT2 works to display digital time. A delay switch can be set through the second time relay KT2 for two groups of simulation experiment time, such as 60S for power on and 10S for power off (seconds), etc. This time can be set and displayed according to the actual situation. The thirteenth contact (pin 5) and the sixteenth contact pin of the second time relay KT2 module are turned on (pin 8). The tenth contact (pin 2) and the thirteenth contact (pin 5) of the second time relay KT2 module supply power to the TV in a delayed cycle power on and off mode, so that the TV is in a cycle power on and off state with a set time. When the power on and off simulation reproduces the bad phenomenon at the set temperature, the pause switch K2 connected to the ninth contact (pin 1) and the twelfth contact (pin 4) of the second time relay KT2 module suspends the switch work of the second time relay KT2 module, so that the TV is always turned on and stays in the bad phenomenon state, which is convenient for viewing and analysis. Figure 2 The TV is connected to the socket XS to supply 220V power to the TV. The tenth contact (pin 2) and the thirteenth contact (pin 5) of the second time relay KT2 module are connected to the power strip XS to supply AC 220V power to the TV and other loads.

[0076] The automatic test circuit of the utility model is implemented by setting a first relay module in the test circuit to control the entire test duration, setting a second relay module to cycle the power on and off of the load under test during the test, and keeping the load under test in the power-on state when the bad problem is reproduced. By cycling the power on and off time within the set time, the power is automatically turned on and off to reproduce the bad phenomena such as random startup freeze, restart, and abnormal picture of the TV. By setting a temperature control module, the TV is heated in the use environment, the working environment temperature of the TV is increased, the aging of the TV is accelerated, and the bad phenomenon is exposed in advance. The automatic test circuit in this application can replace the existing manual AC power on and off to efficiently and quickly reproduce the bad phenomenon, improve the efficiency of analyzing bad problems of the TV, speed up the product launch progress, and ensure product quality.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic test circuit, characterized in that: include: Power module; A first relay module; A second relay module; Temperature control module; The load being measured; The first end of the first relay module is electrically connected to the power module for connecting to a power source; The second end of the first relay module is electrically connected to the first end of the second relay module and the first end of the temperature control module, respectively, for controlling the entire test duration; The second end of the second relay module is electrically connected to the load under test, and is used to cycle the power on and off of the load under test during the test, and to keep the load under test in the power-on state when a defect is reproduced.

2. The automatic test circuit according to claim 1, characterized in that: The power module comprises: AC power supply; Air switch; The AC power supply is electrically connected to the air switch; The AC power supply supplies power to the entire test circuit through the air switch.

3. The automatic test circuit according to claim 2, characterized in that: The first relay module includes a first time relay; The first time relay comprises: A first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact, a seventh contact and an eighth contact; The second contact and the seventh contact are electrically connected to the first output contact and the second output contact of the air switch respectively; The seventh contact point is short-circuited with the eighth contact point.

4. The automatic test circuit according to claim 3, characterized in that: The second relay module comprises: Pause switch; Second time relay; The second time relay comprises: a ninth contact, a tenth contact, an eleventh contact, a twelfth contact, a thirteenth contact, a fourteenth contact, a fifteenth contact, and a sixteenth contact; The pause switch is connected in series between the ninth contact and the twelfth contact, and the fifteenth contact and the sixteenth contact are short-circuited; The fifth contact is electrically connected to the fifteenth contact, and the second contact is electrically connected to the tenth contact.

5. The automatic test circuit according to claim 4, characterized in that: The thirteenth contact is electrically connected to the first input terminal of the load under test, and the tenth contact is electrically connected to the second input terminal of the load under test.

6. The automatic test circuit according to claim 3, characterized in that: The temperature control module comprises: Control unit; Temperature measuring unit; Heating unit; The control unit is electrically connected to the temperature measuring unit and the heating unit respectively; The first input end of the temperature control module is electrically connected to the second contact, and the second input end is electrically connected to the seventh contact.

7. The automatic test circuit according to claim 6, characterized in that: The temperature control module also includes: Control switch; The control switch is electrically connected between the control unit and the heating unit.

8. The automatic test circuit according to claim 7, characterized in that: The heating unit comprises: Electric fans and heating tubes; The electric fan and the heating tube are connected in parallel in the output circuit of the temperature control module.

9. The automatic test circuit according to claim 8, characterized in that: The temperature control module also includes: Setting unit and display unit; The setting unit and the display unit are electrically connected to the control unit, and are used for setting the temperature and displaying the real-time temperature, respectively.

10. The automatic test circuit according to any one of claims 1 to 9, characterized in that: The load to be measured is a television.

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