Power distribution terminal dual power supply power-on detection automation test module

Abstract

Provided is a power distribution terminal dual-power-supply power-on detection automation test module. Relates to the field of power distribution terminal power testing. In order to solve the defects that an existing power distribution terminal cannot test power input, is poor in safety and has burning risks, a power input terminal is connected with the input end of a power conversion chip, the output end of the power conversion chip is connected with the input end of a main chip, the input end of an AD chip is connected with the power input terminal, and the output end of the main chip is connected with the power input terminal. The output end of the AD chip is connected with the input end of the main chip, the output end of the test switch is connected with the input end of the main chip, the input end of the relay is connected with the power input terminal, and the input end of the result display lamp and the input end of the relay are connected with the output end of the main chip. And the output end of the relay is connected with the power supply output terminal. The power supply detection device is mainly used for automatically detecting the power supply when the dual power supplies of the power distribution terminal are powered on.

Description

Technical Field

[0001] This utility model relates to the field of power supply testing for power distribution terminals, and particularly to an automated testing module for dual-power supply power-on detection of power distribution terminals. Background Technology

[0002] Currently, most power distribution terminals do not have the function of testing whether the power input is abnormal during factory testing. This means that if the input power is abnormal and the voltage is too high, it will burn out the internal circuitry of the gateway, causing irreversible damage to both the input power and the power distribution terminal.

[0003] Therefore, there is a need for an automated test module for dual power supply detection of power distribution terminals that can test whether there are any abnormalities in the input power supply of the power distribution terminal, improve the power supply safety of the power distribution terminal, and reduce the risk of power supply burnout. Utility Model Content

[0004] To address the shortcomings of existing power distribution terminals, such as their inability to test power input, poor safety, and risk of burnout, this utility model provides an automated testing module for dual-power supply detection of power distribution terminals. This module can test whether there are any abnormalities in the input power of the power distribution terminal, improve the power safety of the power distribution terminal, and reduce the risk of power burnout.

[0005] The present invention discloses an automated test module for dual power supply power-on detection of a power distribution terminal, comprising a detection circuit, which includes a power input terminal, a power output terminal, a result display light, a test switch, an AD chip, a main chip, a relay, and a power conversion chip.

[0006] The power input terminal is connected to the input terminal of the power conversion chip, the output terminal of the power conversion chip is connected to the input terminal of the main chip, the input terminal of the AD chip is connected to the power input terminal, the output terminal of the AD chip is connected to the input terminal of the main chip, the output terminals of the test switches are all connected to the input terminals of the main chip, the input terminal of the relay is connected to the power input terminal, the input terminals of the result display lamp and the relay are both connected to the output terminals of the main chip, and the output terminal of the relay is connected to the power output terminal.

[0007] Furthermore, it also includes a switching switch and a MOSFET, wherein the switching switch is connected to the input terminal of the main chip, and the MOSFET is disposed between the relay and the power conversion chip.

[0008] Furthermore, it also includes a housing, wherein the power input terminal, power output terminal, result display light, test switch and switch are all located on the outside of the housing, and the detection circuit is located on the inside of the housing.

[0009] Furthermore, it also includes a buzzer, which is connected to the output terminal of the main chip.

[0010] Furthermore, both the test switch and the toggle switch are push-button switches.

[0011] The beneficial effects of this utility model are:

[0012] This utility model discloses an automated testing module for dual-power supply detection of a power distribution terminal. It can safely supply power to the power distribution terminal. Through one-button automated testing, the module's AD chip sampling function detects whether the input power supply is within the 24V±10% range of the power supply voltage of the power distribution terminal. Then, the main chip controls a relay to supply power to the power distribution terminal, and LEDs display the test results. The dual power supply includes a 24V power supply and a 48V operating power supply.

[0013] This utility model discloses an automated test module for dual power supply power-on detection of a power distribution terminal. It can safely test the power function of the power distribution terminal, improve safety, reduce the risk of power supply burnout, and at the same time test whether there are short circuits or open circuits in the power circuit of the power distribution terminal. Attached Figure Description

[0014] Figure 1 This is the circuit block diagram of the detection circuit;

[0015] Figure 2 This is the circuit diagram of the detection circuit;

[0016] Figure 3 This is a diagram of the shell structure of the automated testing module.

[0017] In the diagram, 1 is the power input terminal; 2 is the power output terminal; 3 is the result display light; 4 is the test switch; 5 is the housing; 6 is the AD chip; 7 is the main chip; 8 is the relay; 9 is the power conversion chip; and 10 is the toggle switch. Detailed Implementation

[0018] The following are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. The embodiments described below are only for explaining this utility model and should not be construed as limiting this utility model. The scope of protection of this utility model should be determined by the scope of the claims. The embodiments of this utility model are described in detail below. In order to facilitate the description of this utility model and simplify the description, the technical terms used in the specification of this utility model should be interpreted broadly, including but not limited to conventional alternatives not mentioned in this application, as well as direct and indirect implementation methods.

[0019] Example 1

[0020] Combination Figures 1-3 This embodiment describes an automated test module for dual-power supply detection of a power distribution terminal, which includes a detection circuit mounted on a PCB board for automated power-on detection testing.

[0021] like Figure 1 As shown, the detection circuit includes a power input terminal 1, a power output terminal 2, a result display light 3, a test switch 4, an AD chip 6, a main chip 7, a relay 8, and a power conversion chip 9;

[0022] The power input terminal 1 is connected to the input terminal of the power conversion chip 9, and the output terminal of the power conversion chip 9 is connected to the input terminal of the main chip 7. The input terminal of the AD chip 6 is connected to the power input terminal 1, and the output terminal of the AD chip 6 is connected to the input terminal of the main chip 7. The output terminals of the test switches 4 are all connected to the input terminals of the main chip 7. The input terminal of the relay 8 is connected to the power input terminal 1. The input terminals of the result display lamp 3 and the relay 8 are both connected to the output terminals of the main chip 7, and the output terminal of the relay 8 is connected to the power output terminal 2. The power input terminal 1 can be a 5.08mm pitch terminal for connecting to the power supply, and the power output terminal 2 can be a 5.08mm pitch terminal for connecting to the power distribution terminal. The AD chip 6 is an AD7616BSTZ-RL AD chip from Analog Devices (ADI) used to acquire the voltage amplitude of the input power supply. The main chip 7 is a Freescale Semiconductor MCF5275CVM166 microcontroller, used to light up the LEDs, control the on / off state of the relay 8, and receive voltage amplitude information from the AD converter. The relay 8 is a Ningbo Songle Relay Co., Ltd. SRD-03VDC-SL-C relay, used to control the on / off state of the power output.

[0023] The system also includes a switching switch 10 and a MOSFET. The switching switch 10 is located between the power input terminal 1 and the power conversion chip 9, and the MOSFET is located between the relay 8 and the power conversion chip 9. The switching switch is used to switch the power supply. The power conversion chip 9 is a wide-range power conversion chip, model URB4803YMD-6WR3, manufactured by Guangzhou Mornsun Technology Co., Ltd., capable of converting DC 18-75V to DC 3.3V. The MOSFET is a model BLM4435, manufactured by Belling. Both the test switch 4 and the switching switch 10 are push-button switches. 24V and 48V are two commonly used power supply voltages in power distribution terminals; however, they can be replaced with other conventional power supply voltages if necessary.

[0024] like Figure 3 It also includes a housing 5. The power input terminal 1, power output terminal 2, result display light 3, test switch 4, and toggle switch are all located on the outside of the housing 5, while the detection circuit is located on the inside of the housing 5. The detection circuit is mounted on a PCB board, and the PCB board is installed inside the housing 5.

[0025] Before testing the automated testing module described in this embodiment, the following installation and preparation work needs to be performed:

[0026] S1. Solder all components onto the PCB board according to the circuit diagram, and then install the PCB board into the housing 5.

[0027] S2. Connect the power supply to the power input terminal 1, and connect the power distribution terminal to the power output terminal 2 of the automation test module.

[0028] The automated testing module described in this embodiment performs the following steps during the 24-volt test process:

[0029] S3. Start the test switch 4. The AD chip 6 will use the collected discrete power supply input voltage signal as sampling points and calculate the average voltage using the sampling points to obtain the digital signal of the power supply voltage amplitude. The AD chip is an AD7616BSTZ-RL model manufactured by Analog Devices (ADI). For example, a 24V sampling voltage corresponds to a sampling value of 2400. Then, within a certain period of time, 10 values ​​are sampled, such as 42010, 24005, ..., 23995. The average of these 10 sampling points is then taken to calculate the voltage value.

[0030] like Figure 2 As shown, when the D2 module detects the voltage drop across the voltage divider resistors R7 and R6, for example, if the power supply voltage is 25V, then after the voltage is divided by resistors R7 and R6, the voltage is 2.5V and sent to the D2 module to prevent the D2 module from burning out due to excessive input voltage.

[0031] S4. Check if the input power supply is normal:

[0032] The AD chip 6 transmits digital signals to the main chip 7. The main chip 7 is powered by a wide-range power conversion module 9. The main chip 7 determines whether the input power of the current power supply is within the preset input range of the power distribution terminal. If it is within the range, the main chip 7 controls the coil of the relay 8 to conduct, thereby outputting power to the power output terminal 2, energizing the power distribution terminal, and simultaneously controlling the result display light 3 to illuminate, indicating normal operation. If the input is not within the preset input range of the power distribution terminal, the main chip 7 does not control the relay 8, thereby not supplying power to the power distribution terminal, and simultaneously turning off the result display light 3, informing the tester that there is a problem with the power supply. For example, the preset power input range is 24V±10%.

[0033] The voltage divided value obtained in S3 is sent to the main chip D1. The main chip D1 is powered by the wide-range power conversion module D3. The purpose of the power conversion module D3 is to convert the input power into a stable 3.3V power supply to power each chip. The main chip D1 determines whether the power supply is qualified by detecting whether the voltage amplitude sent by the D2 module is within 24V±10%.

[0034] If the result is not satisfactory, the main chip D1 pulls pin 8 low to make the result display LED V1 light up red, and at the same time pulls pin 10 low to make the buzzer J1 sound to warn the operator of a power supply abnormality.

[0035] If it passes, proceed with the S5 test;

[0036] S5. Check if there is a short circuit in the power distribution terminal:

[0037] First, pin 7 of the main chip D1 is pulled high to 3.3V, which pulls up the base voltage of transistor V5, putting V5 in saturation. This is equivalent to the collector and emitter being connected, so the collector voltage approaches 0V. Therefore, resistors R14 and R13 divide the 3.3V voltage. According to the voltage division ratio, the voltage at pin 4 of MOSFET D4 is 0.3V, meeting the conduction condition of MOSFET D4. Therefore, pins 5-8 of MOSFET D4 output 3.3V-YZ. This 3.3V is then sent to the coils of relays J2 and J3. This function serves as a protection measure to effectively prevent relays J2 and J3 from malfunctioning in interference environments. Then, pin 17 of the main chip D1 is pulled high to 3.3V, which pulls up the base voltage of transistor V4, putting V4 in saturation. This is equivalent to the collector and emitter being connected, so the collector voltage approaches 0V. When the relay is conducting, the collector voltage approaches 0V, and the coil of relay J3 has a voltage of 3.3V. The contacts of relay J3 are open, and the power supply is sent to resistor R9 through the contacts of relay J3. The power supply is divided by resistors R9 and R8, and the voltage is 1 / 10 of the original voltage. For example, if the power supply voltage is 25V, it will become 2.5V after being divided by resistors R9 and R8, and then sent to the power output terminal SX2, which is the power distribution terminal under test. At this time, the power supply of the power distribution terminal under test (the signal DY-OUT+) is detected. The value is divided by resistors R3 and R4 and sent to AD chip D2. Then the value is sent to main chip D1. Main chip D1 determines whether there is a short circuit inside the power distribution terminal by detecting whether the amplitude sent by AD chip is 0.

[0038] If the value is 0, it indicates a short circuit in the power distribution terminal. In this case, the main chip D1 pulls pin 8 low to make the result display light V1 turn red, and at the same time pulls pin 10 low to make the buzzer J1 sound to warn the operator of a power abnormality.

[0039] If it is not 0, it proves that there is no short circuit and power can be supplied normally, then proceed to S6;

[0040] S6. Supply power to the power distribution terminal:

[0041] The main chip D1 pulls pin 18 high to 3.3V, which raises the base voltage of transistor V3, putting V3 in saturation. This is equivalent to the collector and emitter being connected, so the collector voltage approaches 0V. The coil of relay J2 now has 3.3V, and the contacts of J2 are open, supplying power to the power distribution terminal through the relay's contacts. Simultaneously, pin 9 is pulled low, causing the result indicator V2 to light up green, indicating that the power supply is functioning correctly.

[0042] The automated testing module described in this embodiment also has the function of testing 48V operating power supply. By pressing the switch 10 on the module, pin 13 of the main chip is pulled low, and the main chip D1 switches the mode to test the 48V operating power supply mode. The steps are the same as those for testing the 24V power supply, testing whether the 48V operating power supply of the power distribution terminal is within 48V±10%.

Claims

1. An automated test module for dual-power supply detection of a power distribution terminal, characterized in that, The detection circuit includes a power input terminal (1), a power output terminal (2), a result display lamp (3), a test switch (4), an AD chip (6), a main chip (7), a relay (8), and a power conversion chip (9). The power input terminal (1) is connected to the input terminal of the power conversion chip (9), the output terminal of the power conversion chip (9) is connected to the input terminal of the main chip (7), the input terminal of the AD chip (6) is connected to the power input terminal (1), the output terminal of the AD chip (6) is connected to the input terminal of the main chip (7), the output terminal of the test switch (4) is connected to the input terminal of the main chip (7), the input terminal of the relay (8) is connected to the power input terminal (1), the input terminals of the result display lamp (3) and the relay (8) are both connected to the output terminal of the main chip (7), and the output terminal of the relay (8) is connected to the power output terminal (2).

2. The automated test module for dual-power supply detection of a power distribution terminal according to claim 1, characterized in that, It also includes a switching switch (10) and a MOSFET, wherein the switching switch (10) is connected to the input terminal of the main chip (7), and the MOSFET is located between the relay (8) and the power conversion chip (9).

3. The automated test module for dual-power supply detection of a power distribution terminal according to claim 1, characterized in that, It also includes a housing (5), the power input terminal (1), the power output terminal (2), the result display lamp (3), the test switch (4) and the switching switch (10) are all located on the outside of the housing (5), and the detection circuit is located on the inside of the housing (5).

4. The automated test module for dual-power supply detection of a power distribution terminal according to claim 1, characterized in that, It also includes a buzzer, which is connected to the output of the main chip (7).

5. The automated test module for dual-power supply detection of a power distribution terminal according to claim 1, characterized in that, Both the test switch (4) and the toggle switch (10) are push-button switches.

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