Automatic control system special for product aging heating

Abstract

The utility model discloses an automatic control system specially used for product aging heating, comprising a controller and a touch display screen connected with the controller, the controller is connected with an expansion module which converts signals into 4-20mA standard signals, the expansion module is connected with a plurality of temperature transmitters, and the expansion module adopts an EM20-2-4 expansion module. According to the utility model, a temperature signal is converted into a 4-20mA standard signal to enter the controller, the controller carries out constant temperature control according to the aging temperature set on the touch screen, and meanwhile, aging data of an aging product is collected in a communication manner and displayed on the touch screen in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic control, and in particular relates to an automatic control system specially used for product aging heating. Background Art

[0002] Electronic product aging test is a test method that simulates the environmental impact of a product during long-term use to ensure the reliability and stability of the product. Electronic product aging test is an accelerated environmental stress screening process that simulates various environmental factors that may be encountered during long-term use by continuously operating electronic products under specific temperature, humidity, voltage, current and other conditions.

[0003] At present, PLC controllers are often used in combination with analog modules to collect multi-channel temperature sensor signals, perform temperature PID operations, and output signals to control independent voltage regulators to change the output power of the resistance heating load, thereby achieving the purpose of constant temperature. Although this method is highly versatile, it also leads to a lot of functional waste and high costs. Summary of the invention

[0004] The purpose of the utility model is to provide an automatic control system dedicated to product aging heating. The system converts the temperature signal into a 4-20mA standard signal and enters the controller. The controller performs constant temperature control according to the aging temperature set on the touch screen, and at the same time communicates and collects the aging data of the aging product and displays it on the touch screen in real time.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An automatic control system specially used for product aging heating comprises a controller and a touch display screen connected to the controller, wherein the controller is connected to an expansion module, and the expansion module is connected to several temperature transmitters, wherein the expansion module adopts an EM20-2-4 expansion module.

[0007] Furthermore, the controller adopts an SR40 main controller.

[0008] Furthermore, the touch display screen adopts a TPC1570GN touch screen.

[0009] Furthermore, an emergency stop button is connected between the controller and the touch display screen.

[0010] The utility model converts the temperature collected by the temperature sensor into a 4-20mA standard signal, has strong anti-interference ability, is not easily interfered by external factors, is convenient for accurate measurement and adjustment in temperature control, and is beneficial to the performance of product aging tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the SR40 main controller of the present utility model.

[0013] Figure 3 This is a schematic diagram of the EM20-2-4 expansion module structure of the utility model.

[0014] Figure 4 It is a schematic diagram of the touch display screen display of the present utility model. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, the present embodiment provides an automatic control system specially used for product aging heating, including a controller, a touch screen, a temperature transmitter and an extension module. The controller, the touch screen and the temperature changer are all common modules of existing automatic control equipment. The present embodiment improves the connection method between the temperature transmitter and the controller. The present embodiment connects an extension module between the controller and the temperature changer. The temperature collected by the temperature transmitter is converted into a 4-20mA standard signal through the extension module, which can provide more accurate data in the temperature transmission process, which is beneficial to the product aging test.

[0016] The controller of this embodiment specifically adopts SR40 main controller, which is connected to the touch display screen through a network cable. The touch display screen adopts TPC1570GN touch screen, which is connected to the SR40 main controller through a 232 to 485 module. The SR40 main controller and TPC1570GN touch screen of this embodiment are also provided with an emergency stop button, such as Figure 2 As shown, the emergency stop button can be used to control the emergency stop operation of the touch display screen.

[0017] like Figure 3 As shown, the expansion module of this embodiment specifically adopts the EM20-2-4 expansion module. The EM20-2-4 expansion module is a device for increasing the number of digital input / output points of a programmable logic controller (PLC). The input device of this embodiment is a temperature transmitter. This embodiment is provided with 5 temperature transmitters, which can measure the temperature signals of 5 positions. The temperature signal is converted into a 4-20mA standard signal through the EM20-2-4 expansion module and then enters the SR40 main controller. The SR40 main controller collects the acquired temperature signal and sends it to the touch screen for display, so that the test personnel can timely understand the temperature of the test site and change the temperature through other drive devices. In this embodiment, the temperature signal is converted into a 4-20mA standard signal through the EM20-2-4 expansion module, which reduces signal interference, makes the acquired signal more accurate, and thus makes the data of the aging test more accurate.

[0018] This embodiment uses a 24V power supply to power the entire system. The final display result of the system is as follows Figure 4 shown.

[0019] The above is only a preferred implementation of the utility model, but the protection scope of the utility model is not limited thereto, and any modification and replacement based on the technical solution and utility model concept provided by the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic control system dedicated to product aging heating, comprising a controller and a touch screen connected to the controller, characterized in that: The controller is connected to an expansion module for converting the signal into a 4-20mA standard signal, and the expansion module is connected to several temperature transmitters, wherein the expansion module adopts an EM20-2-4 expansion module.

2. According to claim 1, an automatic control system dedicated to product aging heating is characterized in that: The controller adopts SR40 main controller.

3. An automatic control system specially used for product aging heating according to claim 2, characterized in that: The touch display screen adopts a TPC1570GN touch screen.

4. The automatic control system specially used for product aging heating according to claim 3, characterized in that: An emergency stop button is connected between the controller and the touch display screen.

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