Multifunctional signal processing device

Abstract

The utility model discloses a multifunctional signal processing device, which comprises an upper computer, an acquisition card, a PLC (Programmable Logic Controller) and a switching power supply, the upper computer is respectively connected with the acquisition card and the PLC, and the switching power supply is connected with the PLC; a DI interface of the PLC is connected with a DO channel of a tested piece, and outputs an excitation signal with a preset voltage value to the tested piece; a DO channel of the PLC is connected with a DI interface of the tested piece to obtain a DO signal of the tested piece; and the acquisition card is connected with the voltage output interface of the tested piece to acquire a voltage signal of the tested piece. According to the technical scheme of the utility model, the excitation and signal acquisition of the tested piece are realized, the function test of the tested equipment interface in different states is realized, and the effectiveness of the equipment interface can be detected at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit testing, in particular to a multifunctional signal processing device. Background Art

[0002] In order to test the functions of device interfaces, it is necessary to collect and process various different types of signals. And in order to test these different types of interfaces in the device, it is necessary to apply signal excitation to the interfaces of the device under test, and then test the interface functions in different states.

[0003] However, in the prior art, there is no corresponding device or system to provide different excitation signals for device interfaces respectively, and it is impossible to test the interface functions in different states. Summary of the Utility Model

[0004] Aiming at the above problems, the utility model provides a multifunctional signal processing device, which realizes the excitation and signal acquisition of the device under test through the interaction control between the upper computer, the PLC controller and the acquisition card, realizes the function test of the interfaces of the device under test in different states, and can detect the effectiveness of the device interfaces at the same time.

[0005] To achieve the above object, the utility model provides a multifunctional signal processing device, comprising: an upper computer, an acquisition card, a PLC controller and a switching power supply;

[0006] The upper computer is respectively connected to the acquisition card and the PLC controller, and the switching power supply is connected to the PLC controller;

[0007] The DI interface of the PLC controller is connected to the DO channel of the device under test to output an excitation signal with a preset voltage value to the device under test;

[0008] The DO channel of the PLC controller is connected to the DI interface of the device under test to obtain the DO signal of the device under test;

[0009] The acquisition card is connected to the voltage output interface of the device under test to obtain the voltage signal of the device under test.

[0010] In the above technical solution, preferably, the DI interface of the PLC controller is connected to the DO channel of the device under test through a fuse.

[0011] In the above technical solution, preferably, the DO channel of the PLC controller is connected to the DI interface of the device under test through an isolation relay.

[0012] In the above technical solution, preferably, the acquisition card is connected to the voltage output interface of the device under test through a signal isolator.

[0013] In the above technical solution, preferably, the PLC controller is connected to the host computer through an Ethernet cable, and the acquisition card is connected to the host computer through a PCIE interface.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the interactive control between the host computer, the PLC controller and the acquisition card, the excitation and signal acquisition of the device under test are realized, the functional test of the interface of the device under test in different states is realized, and the effectiveness of the device interface can be detected at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a multifunctional signal processing device disclosed in an embodiment of the present utility model.

[0016] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0017] 1. Host computer, 2. Acquisition card, 3. PLC controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0020] As Figure 1 shown, a multifunctional signal processing device provided by the present utility model includes: a host computer 1, an acquisition card 2, a PLC controller 3 and a switching power supply;

[0021] The host computer 1 is respectively connected to the acquisition card 2 and the PLC controller 3, and the switching power supply is connected to the PLC controller 3;

[0022] The DI interface of the PLC controller 3 is connected to the DO channel of the device under test to output an excitation signal with a preset voltage value to the device under test;

[0023] The DO channel of the PLC controller 3 is connected to the DI interface of the device under test to obtain the DO signal of the device under test;

[0024] The acquisition card 2 is connected to the voltage output interface of the device under test to obtain the voltage signal of the device under test.

[0025] In this embodiment, through the interaction control between the host computer 1, the PLC controller 3, and the acquisition card 2, the excitation of the DUT and signal acquisition are realized, the functional test of the DUT interface in different states is achieved, and the effectiveness of the device interface can be detected simultaneously.

[0026] Specifically, in this multi-functional signal processing device, it is mainly used to output and input signals to the DUT during the test. The output signal serves as the excitation voltage signal of the DUT, and the specific voltage value is adjusted according to the voltage range required by the DUT. For example, if the DUT needs to be tested with different voltage values in the range of 55V - 170V, a voltage control instruction is sent from the host computer 1 to the PLC controller 3, so that the DI interface of the PLC controller 3 outputs a voltage signal with the corresponding voltage value to the DUT.

[0027] In addition, during the signal input process, the DO signal of the DUT is obtained through the DO channel of the PLC controller 3, and the voltage signal of the DUT is obtained through the acquisition card 2. The host computer 1 determines the working state of the DUT based on the above-mentioned collected signals.

[0028] In the above embodiment, preferably, the DI interface of the PLC controller 3 is connected to the DO channel of the DUT through a fuse. When the current reaches the fuse melting current (such as 0.5A), fuse protection is performed to avoid damage to the DUT caused by high current.

[0029] In the above embodiment, preferably, the DO channel of the PLC controller 3 is connected to the DI interface of the DUT through an isolation relay. When the current exceeds a certain value, the circuit is interrupted to prevent damage to the DUT caused by excessive current.

[0030] In the above embodiment, preferably, the acquisition card 2 is connected to the voltage output interface of the DUT through a signal isolator, reducing the possibility that signal parameters such as the instantaneous value of the collected voltage signal, the peak-to-peak value of the continuous voltage waveform, and the frequency are affected.

[0031] In the above embodiment, preferably, the PLC controller 3 is connected to the host computer 1 through an Ethernet cable, the acquisition card 2 is connected to the host computer 1 through a PCIE interface, the input interface of the switching power supply is connected to the AC mains with a voltage of 220V and a frequency of 50Hz, and the output interface is connected to the power interface of the PLC controller 3.

[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multifunctional signal processing device, characterized in that, Including: A host computer, a data acquisition card, a PLC controller, and a switching power supply; The host computer is respectively connected to the data acquisition card and the PLC controller, and the switching power supply is connected to the PLC controller; The DI interface of the PLC controller is connected to the DO channel of the device under test to output an excitation signal with a preset voltage value to the device under test; The DO channel of the PLC controller is connected to the DI interface of the device under test to obtain the DO signal of the device under test; The data acquisition card is connected to the voltage output interface of the device under test to obtain the voltage signal of the device under test.

2. The multifunctional signal processing device according to claim 1, wherein The DI interface of the PLC controller is connected to the DO channel of the device under test through a fuse.

3. The multifunctional signal processing device according to claim 1, wherein The DO channel of the PLC controller is connected to the DI interface of the device under test through an isolation relay.

4. The multifunctional signal processing device according to claim 1, wherein The data acquisition card is connected to the voltage output interface of the device under test through a signal isolator.

5. The multifunctional signal processing device according to claim 1, wherein The PLC controller is connected to the host computer through an Ethernet cable, and the data acquisition card is connected to the host computer through a PCIE interface.

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