CN218412809U

CN218412809U - Automatic test tooling board of power panel

Info

Publication number: CN218412809U
Application number: CN202222387924.4U
Authority: CN
Inventors: 杨永旭; 耿永; 芮振雷
Original assignee: China Key System and Integrated Circuit Co Ltd
Current assignee: China Key System and Integrated Circuit Co Ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-01-31
Anticipated expiration: 2032-09-08

Abstract

The utility model relates to a power strip test technical field, concretely relates to automatic test frock board of power strip, include: the system comprises a singlechip minimum system circuit, a 220V mains supply connection control circuit, a DC-DC circuit, a relay attraction detection circuit, an entrance guard signal detection circuit, an NTC data acquisition circuit, a 5V voltage detection circuit and an LCD display circuit; the minimum system circuit of the single chip microcomputer is electrically connected with the 220V mains supply switch-on control circuit, the DC-DC circuit, the relay attraction detection circuit, the entrance guard signal detection circuit, the NTC data acquisition circuit, the 5V voltage detection circuit and the LCD display circuit respectively. So as to meet the requirement of automatic testing of the 4-spliced-board power panel. The testing method can obviously improve the testing efficiency, reduce the testing cost, effectively avoid misjudgment of testers and reduce the operation risk of operators.

Description

Automatic test tooling board of power panel

Technical Field

The utility model relates to a power strip test technical field, concretely relates to automatic test frock board of power strip.

Background

At present, with the development of science and technology, various home appliances and office equipment have been widely popularized in daily life. The hardware design of these products is generally divided into two modules, i.e., a power panel and a display panel. For example, the design concept is mostly adopted in the hardware design scheme of products such as cooking ranges, washing machines, refrigerators, microwave ovens, air conditioners, printers and the like. In the actual production and manufacturing process, the power panel and the display panel need to be subjected to functional testing, and the qualified test can be sent to an assembly center for complete machine assembly and testing. The existing power panel testing method is traditionally implemented through manual operation of personnel, the testing speed is low, and the testing state and results need to be observed in real time by personnel, so that automatic batch testing is difficult to realize, and due to the access of 220V mains supply, great hidden dangers exist for the personal safety of operators.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides an automatic test frock board of power strip to realize the automatic test demand of 4 makeup power strips. Meanwhile, the design of the tooling plate meets the compatibility test of derived models of the same products. The testing method can obviously improve the testing efficiency, reduce the testing cost, effectively avoid misjudgment of testers and reduce the operation risk of operators.

The utility model discloses a following technical scheme realizes:

an automated test tooling plate for a power strip, comprising: the system comprises a singlechip minimum system circuit, a 220V mains supply connection control circuit, a DC-DC circuit, a relay attraction detection circuit, an entrance guard signal detection circuit, an NTC data acquisition circuit, a 5V voltage detection circuit and an LCD display circuit; the minimum system circuit of the single chip microcomputer is electrically connected with the 220V mains supply switch-on control circuit, the DC-DC circuit, the relay attraction detection circuit, the entrance guard signal detection circuit, the NTC data acquisition circuit, the 5V voltage detection circuit and the LCD display circuit respectively.

Preferably, the IO port of the minimum system circuit of the single chip mainly includes an output control interface, a data acquisition interface, and a minimum peripheral interface.

Preferably, the 220V mains supply connection control circuit is used for controlling the power-on sequence of the 4 spliced power supply boards by the tooling board, and the DC-DC circuit is used for externally connecting a 220V-24V isolation voltage-stabilized power supply module to the tooling board and supplying power to the minimum system circuit of the single chip microcomputer.

Preferably, the testing device further comprises a signal pin circuit which is used for connecting the tooling board and the power supply board to be tested in an electrical relationship.

The beneficial effects of the utility model are that:

the utility model provides an automatic test frock board design of power strip to realize the automatic test demand of 4 makeup power strips. Meanwhile, the circuit design of the tooling plate meets the compatibility test of derived models of the same products. The testing method can obviously improve the testing efficiency, reduce the testing cost, effectively avoid misjudgment of testers and reduce the operation risk of operators.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a circuit module relationship diagram of a power panel/tooling board.

Fig. 2 is a circuit diagram of a minimum system of a tooling plate single chip microcomputer.

Fig. 3 is a circuit diagram of a tooling plate 220V commercial power connection control circuit.

FIG. 4 is a tooling plate DC-DC (24V-5V) circuit diagram.

Fig. 5 is a circuit diagram of a tooling plate 5V voltage detection.

Fig. 6 is a circuit diagram of a tooling plate relay pull-in detection circuit.

Fig. 7 is a circuit diagram of an LCD display of the tooling plate.

Fig. 8 is a circuit diagram of a signal pin of the tooling plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides an automatic test tooling board's of power strip technical scheme, as shown in FIG. 1, according to the actual circuit module of being surveyed the power strip, the circuit module of design tooling board includes singlechip minimum system circuit 100, 220V commercial power switch-on control circuit 200, DC-DC circuit (24V-5V) 300, relay actuation detection circuitry 400, entrance guard signal detection circuitry 500, NTC data acquisition circuit 600, 5V voltage detection circuitry 700 and LCD display circuit 800 8 modules altogether.

Wherein 4 makeup power strips of quilt survey mainly include: an AC-DC circuit (220V-5V), a fan motor control circuit, a heating pipe control circuit, an entrance guard signal circuit, a buzzer alarm circuit and an NTC temperature acquisition circuit. The design principle of the power board, the automatic test program, and the pcslayout layout are well known in the art, and therefore are not described in detail.

The minimum system circuit 100 of the single chip microcomputer of the tooling plate is shown in fig. 2, the main control MCU of the minimum system circuit of the single chip microcomputer selects a Saiyuan SC95F8616 single chip microcomputer, wherein an E3 electrolytic capacitor and a C5 capacitor filter power signals entering the single chip microcomputer, and a JP6 base is used for programming and burning a main chip. In order to meet the test requirements of the 4-spliced power panel, two 74HC138 chips are selected to expand IO ports. The IO port of the whole singlechip minimum system circuit is mainly divided into an output control interface, a data acquisition interface and a minimum peripheral interface. The output control interface comprises a mains supply connection control interface of RELY1-4, 12 paths of relay drive output interfaces of FAN1-4, HEATDD 1-4 and HEATU1-4, 4 interfaces of an LCD display module RS/RW/E/LCDRST, a buzzer Buzz interface, a debugging and burning interface CLK/DIO and the like; the data acquisition interface mainly comprises a VCCAD1-4 power supply voltage 5V detection interface, an NTC1-8 voltage value detection interface and a Port1-12 input signal detection interface; the minimum peripheral interface comprises a VCC interface and a DGND interface.

Fig. 3 shows a 220V commercial power connection control circuit 200, which is used for a tooling board to control the power-on sequence of a 4-spliced power panel, fig. 3 only shows a 220V commercial power connection control circuit of a power panel 1, and the rest 3 control circuits are the same as fig. 3. As can be known from FIG. 3, when the tooling board MCU sends the RELY1 signal, the Q2 triode with NPN type structure is conducted, the J1 relay is closed, the 220V commercial power ACL # is connected, and the power supply board 1 to be tested starts to supply power. The two ends of the relay J1 are connected with 1 diode D2 in parallel for relay protection, and connected with a red LED lamp bead D24 in parallel for relay suction state indication, and the LED is lightened when the relay is switched on.

The DC-DC circuit (24V-5V) 300 is shown in fig. 4, and the existing classical mature circuit is selected as the conversion circuit of this part and is used for the tooling board to connect with the 220V-24V isolation voltage-stabilized power supply module, and then the minimum system circuit (as shown in fig. 1) is supplied with power through the conversion circuit. And two ends of a C3 capacitor for outputting a 5V power supply are connected with a red LED lamp bead D23 in parallel for indicating the output of 5V voltage, and when the tooling plate is externally connected with a 220V-24V isolation voltage-stabilized power supply module and outputs 5V, the LED indicating lamp is lightened.

As shown in fig. 5, when the tooling board receives a 5V voltage signal QD1-5V from the power board 1 through the tooling lead, a voltage value of about 2.5V at the rear end of the R25 resistor can be acquired through two 10K voltage dividing resistors R25 and R26 on the tooling board by the single chip microcomputer VCCAD1 channel, which indicates that the 220V-5V circuit of the power board 1 functions normally. The 5V output test circuit of the power supply boards 2-4 is the same as that of FIG. 5.

The relay pull-in detection circuit 500 is shown in fig. 6, 2 heating pipes and 1 motor fan output on the power panel 1 are controlled by 3 relays, and during testing, corresponding relays on the power panel 1 need to be driven to be closed at first, and then whether the relays are closed or not is detected. The MCU on the tooling plate sends driving signals FAN1, HEATED 1 and HEATU1, and after the power panel 1 receives the driving signals, if the circuit welding is qualified, the corresponding relays are respectively closed. With reference to fig. 6, through thimble wiring on the automatic test tool, when the FAN1 drives the relay to close and introduces 220V commercial power, firstly, through power resistors R18 and R23 of rectifier diodes D7 and 32.4k 2W of the detection circuit, 1 resistor of 2K and a capacitor of 150Pf are respectively connected in parallel between pin 1 and pin 3 of the optocoupler U4, so that the voltage and current of the input optocoupler meet the requirements of 2.7V and 25mA, and at this time, the LED inside the optocoupler is turned on to generate an optical signal. Interface and digital power are gathered to 4, 5, 6 feet of opto-coupler are digit ground, singlechip respectively, and when the opto-coupler left side produced light signal, light signal was received on the opto-coupler right side for the inside triode of opto-coupler switches on, and the current value signal that port1 department can be gathered to singlechip IO port this moment is about 12mA, detects relay and silicon controlled rectifier closure promptly. The relay drive output detection circuit of FAN2-4, HEATDD 2-4 and HEATU2-4 is shown in figure 6.

LCD display circuit 800 as shown in fig. 7, the LCD display circuit is used for displaying test status information, and is implemented by software programming, such as: "test successful", "test failed", "relay opened", and "relay closed", etc. Wherein, E is an enabling signal of the control bus, R/W is a reading and writing selection signal of the control bus, RS is a data/command selection signal of the control bus, and LCDRST is a reset signal.

The signal pin circuit of the tooling plate is shown in fig. 8, and the signal pin circuit is mainly a tooling wiring part and is used for electrically connecting the tooling plate and a power supply plate to be tested. QD 1-5V-QD 4-5V are 5V acquisition test connection wires of the tested jointed board, NTC1-AD 1-NTC 1-AD8 are NTC acquisition test connection wires of the tested jointed board, and the part is directly connected with circuit test points of a power panel, FAN1-4, HEATDD 1-4 and HEATU1-4 are test connection wires of driving signals of the tested board.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an automatic test frock board of power strip which characterized in that includes: the system comprises a singlechip minimum system circuit, a 220V mains supply connection control circuit, a DC-DC circuit, a relay attraction detection circuit, an entrance guard signal detection circuit, an NTC data acquisition circuit, a 5V voltage detection circuit and an LCD display circuit; the minimum system circuit of the single chip microcomputer is electrically connected with the 220V mains supply switch-on control circuit, the DC-DC circuit, the relay attraction detection circuit, the entrance guard signal detection circuit, the NTC data acquisition circuit, the 5V voltage detection circuit and the LCD display circuit respectively.

2. The automatic test tooling plate of the power panel as claimed in claim 1, wherein the IO port of the minimum system circuit of the single chip mainly comprises an output control interface, a data acquisition interface and a minimum peripheral interface.

3. The automatic test tooling plate of the power panel as claimed in claim 1, wherein the 220V mains supply connection control circuit is used for the tooling plate to control the power-on sequence of the 4-panel power panel, and the DC-DC circuit is used for the tooling plate to externally connect a 220V-24V isolation and voltage-stabilized power supply module to supply power to the minimum system circuit of the single chip microcomputer.

4. The automated test tooling board of claim 1 further comprising signal pin circuitry for electrically interfacing the tooling board with a power board under test.