Voltage signal acquisition device

Abstract

The utility model discloses a voltage signal acquisition device, which comprises a voltage conversion module, a PLC (programmable logic controller), an upper computer and a switching power supply, the voltage conversion module comprises a voltage dividing assembly, and the voltage dividing assembly is connected with a voltage port to be acquired and converts a 0-50V direct-current voltage signal into a 0-10V direct-current voltage signal; the PLC is connected with the voltage dividing assembly, performs data conversion on the direct-current voltage signal converted by the voltage dividing assembly, and sends the converted data to the upper computer, so that the upper computer can perform analysis and conversion according to the received data to obtain a collected actual voltage value; and the switching power supply is respectively connected with the PLC and the voltage conversion module to supply power. According to the technical scheme of the utility model, analog quantity acquisition can be carried out in a bearing range, the monitoring of a voltage signal by an upper computer is realized, and the test requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit measurement, in particular to a device for collecting voltage signals. Background Art

[0002] During the test, it is necessary to collect DC voltage signals of 0 - 50V and process the signals through a host computer. However, the input voltage range of conventional DC voltage collection devices is generally 0 - 10V or ±10V, which cannot be monitored by the host computer and is insufficient to meet the test requirements. Summary of the Utility Model

[0003] In view of the above problems, the utility model provides a device for collecting voltage signals, which proportionally converts the DC voltage signal of 0 - 50V through a voltage conversion module, and performs analog quantity collection on the converted voltage signal within an acceptable range through a PLC controller, so as to realize the monitoring of the voltage signal by the host computer to meet the test requirements.

[0004] To achieve the above object, the utility model provides a device for collecting voltage signals, including: a voltage conversion module, a PLC controller, a host computer and a switching power supply;

[0005] The voltage conversion module includes a voltage dividing component, which is connected to the voltage port to be collected and converts the DC voltage signal of 0 - 50V into a DC voltage signal of 0 - 10V;

[0006] The PLC controller is connected to the voltage dividing component, converts the DC voltage signal converted by the voltage dividing component, and sends the converted data to the host computer, so that the host computer can perform parsing and conversion based on the received data to obtain the actual voltage value collected;

[0007] The switching power supply is respectively connected to the PLC controller and the voltage conversion module for power supply.

[0008] In the above technical solution, preferably, the voltage dividing component converts the collected DC voltage signal of 0 - 50V according to a ratio of 5:1 to obtain a DC voltage signal of 0 - 10V.

[0009] In the above technical solution, preferably, the voltage conversion module further includes an isolation component, which is connected to the voltage dividing component and realizes electrical isolation by means of optoelectronic coupling.

[0010] In the above technical solution, preferably, the input port of the switching power supply is connected to an AC power supply with a voltage of 220V and a frequency of 50HZ.

[0011] In the above technical solution, preferably, the PLC controller and the host computer are communicatively connected by using the MODBUS RTU protocol of the TCP bus.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The voltage conversion module converts the DC voltage signal of 0 - 50V proportionally, and the PLC controller collects the converted voltage signal within the tolerable range in analog quantity, realizing the monitoring of the voltage signal by the host computer and meeting the test requirements. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a voltage signal acquisition device disclosed in an embodiment of the present utility model.

[0014] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0015] 1. Voltage conversion module, 11. Voltage dividing component, 12. Isolation component, 2. PLC controller, 3. Host computer, 4. Switching power supply. Detailed Embodiments

[0016] 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. Apparently, 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.

[0017] The following further describes the present utility model in detail with reference to the drawings:

[0018] As Figure 1 shown, a voltage signal acquisition device provided by the present utility model includes: a voltage conversion module 1, a PLC controller 2, a host computer 3, and a switching power supply 4;

[0019] The voltage conversion module 1 includes a voltage dividing component 11, and the voltage dividing component 11 is connected to the voltage port to be collected and converts the DC voltage signal of 0 - 50V into a DC voltage signal of 0 - 10V;

[0020] The PLC controller 2 is connected to the voltage dividing component 11, converts the DC voltage signal converted by the voltage dividing component 11, and sends the converted data to the host computer 3, so that the host computer 3 can perform parsing and conversion according to the received data to obtain the actually collected voltage value;

[0021] The switching power supply 4 is respectively connected to the PLC controller 2 and the voltage conversion module 1 for power supply.

[0022] In this embodiment, the voltage conversion module 1 performs proportional conversion on the DC voltage signal of 0 - 50V, and the PLC controller 2 performs analog quantity acquisition on the converted voltage signal within the tolerable range, realizing the monitoring of the voltage signal by the upper computer 3 and meeting the test requirements.

[0023] Specifically, the analog quantity acquisition port of the PLC controller 2 is connected to the output port of the voltage conversion module 1. The input port of the voltage conversion module 1 is connected to the voltage signal, and the PLC controller 2 is connected to the upper computer 3 for communication control. Since the PLC controller 2 can only perform data conversion on the voltage signal of DC0 - 10V at most, therefore, it is necessary to first use the voltage conversion module 1 to convert the DC voltage signal of 0 - 50V into a voltage signal of the corresponding proportional voltage value of 0 - 10V.

[0024] In the above - mentioned embodiment, preferably, the voltage - dividing component 11 converts the collected DC voltage signal within the range of 0 - 50V according to a ratio of 5:1 to obtain a DC voltage signal within the range of 0 - 10V, enabling the PLC controller 2 to collect the DC voltage signal within the range of 0 - 50V, and obtaining the actual voltage value of the collected voltage signal through analysis and conversion by the upper computer 3.

[0025] In the above - mentioned embodiment, preferably, the voltage conversion module 1 further includes an isolation component 12. The isolation component 12 is connected to the voltage - dividing component 11 and realizes electrical isolation by means of opto - coupling, which can effectively cut off the ground wire loop and reduce the influence of electrical noise on the signal.

[0026] In the above - mentioned embodiment, preferably, the input port of the switching power supply 4 is connected to the AC mains with a voltage of 220V and a frequency of 50HZ.

[0027] In the above - mentioned embodiment, preferably, the communication connection between the PLC controller 2 and the upper computer 3 is realized by using the MODBUS RTU protocol of the TCP bus.

[0028] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A voltage signal acquisition device, characterized in that, Including: A voltage conversion module, a PLC controller, a host computer, and a switching power supply; The voltage conversion module includes a voltage dividing component, which is connected to the voltage port to be collected and converts a 0-50V DC voltage signal into a 0-10V DC voltage signal; The PLC controller is connected to the voltage dividing component, performs data conversion on the DC voltage signal converted by the voltage dividing component, and sends the converted data to the host computer, so that the host computer can perform parsing and conversion based on the received data to obtain the actual voltage value collected; The switching power supply is respectively connected to the PLC controller and the voltage conversion module for power supply.

2. The acquisition device for voltage signals according to claim 1, wherein The voltage dividing component converts the collected 0-50V DC voltage signal according to a ratio of 5:1 to obtain a 0-10V DC voltage signal.

3. The acquisition device for voltage signals according to claim 2, characterized in that, The voltage conversion module further includes an isolation component, which is connected to the voltage dividing component and realizes electrical isolation by means of optoelectronic coupling.

4. The acquisition device for voltage signals according to claim 3, characterized in that, The input port of the switching power supply is connected to an AC mains supply with a voltage of 220V and a frequency of 50HZ.

5. The acquisition device for voltage signals according to claim 4, wherein Communication connection between the PLC controller and the host computer is realized by using the MODBUS RTU protocol of the TCP bus.

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