Multifunctional input and output type signal interface module device

Abstract

The utility model relates to a multifunctional input and output type signal interface module device, which comprises a power supply conversion module, an input acquisition module and an output current circuit, the input end of the power supply conversion module is connected with an external power supply, and the output end of the power supply conversion module is divided into two paths to be respectively used by the input acquisition module and the output current circuit; the rear-end signal acquisition equipment of the direct-current interface or the rear-end signal acquisition equipment of the voltage interface is connected with the input end of the input acquisition module; the input acquisition module filters and amplifies a DC voltage signal or a DC current signal and then sends the DC voltage signal or the DC current signal to the CPU to digitize an analog signal, the CPU carries out PWM output on the signal, the signal is isolated by the isolation chip and enters the output current circuit after passing through the rear-end modulation-demodulation circuit, and a corresponding signal is output. According to the utility model, input of various signal types and output of various signal types are supported, and when a direct current signal in a specified range is accessed, the situation that a product cannot work due to the fact that a voltage signal or a current signal is not distinguished is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of signal interfaces, in particular to a multifunctional input-output signal interface module device. Background Art

[0002] With the rapid development of electronic technology and communication technology, the functions of modern electronic equipment and systems are becoming increasingly complex. Signal interface, as a key link in information exchange between devices, has become particularly important. Traditional signal interface modules usually have single functions and are difficult to adapt to diverse application requirements, especially when multiple types of signals need to be processed simultaneously.

[0003] At present, the common signal interface modules on the market can usually only process specific types of signals, such as current signals or voltage signals, and different types of signals require different interface modules to process. This not only increases the complexity and cost of system design, but also brings inconvenience in practical applications.

[0004] like Figure 1 As shown, when the input is a DC signal, connect terminals 1-2; when the input is a two-wire transmitter signal, connect terminals 3-4.

[0005] In addition, with the rapid development of industrial automation and other fields, the demand for interconnection between devices is increasing. This requires signal interface modules to have higher integration and flexibility, support input and output of multiple signal types, simplify system design, and improve work efficiency.

[0006] Therefore, there is an urgent need for a multifunctional signal interface module that can integrate multiple functions and support multiple types of signal input and output to meet the signal processing needs of modern electronic equipment and systems. Utility Model Content

[0007] The utility model designs a multifunctional input-output signal interface module device, which solves the technical problems of the signal interface module in the prior art, such as single function, poor adaptability and complex system design. Specifically, the existing signal interface module mainly has the following technical problems: single function, poor scalability, high cost and large space occupation.

[0008] In order to solve the above-mentioned technical problems, the utility model adopts the following solutions:

[0009] A multifunctional input-output signal interface module device comprises a power conversion module, an input acquisition module and an output current circuit, wherein the input end of the power conversion module is connected to an external power supply, and the output end of the power conversion module is divided into two paths for use by the input acquisition module and the output current circuit respectively; a rear-end signal acquisition device of a DC interface or a rear-end signal acquisition device of a voltage interface is connected to the input end of the input acquisition module; the input acquisition module filters and amplifies a DC voltage signal or a DC current signal, and then sends it to a CPU to digitize an analog signal, and the CPU performs PWM output on the signal, which enters the output current circuit after being isolated by an isolation chip and a back-end modulation and demodulation circuit to output a corresponding signal.

[0010] Preferably, the input acquisition module includes a signal acquisition circuit, a current acquisition and conversion circuit, a CPU control circuit, a PWM output circuit and an input switching circuit; the signal acquisition circuit consists of two signal channels, which are switched by the CPU control circuit under the control of the input switching circuit, and the two signal channels are divided into a DC current channel and a DC voltage channel; the current conversion circuit digitizes the analog current from the signal acquisition circuit and divides it into two paths and transmits them to the CPU control circuit and the PWM output circuit respectively; the CPU control circuit is responsible for the enable switching of the input switching circuit, the processing of the digitized signal of the current acquisition and conversion circuit, and the control of the output signal of the PWM output circuit; the PWM output circuit transmits the signal processed by the CPU control circuit to the front stage of the isolation chip; the PWM waveform output by the CPU control circuit through the PWM output circuit is isolated and transmitted by the isolation chip, and then converted into a DC voltage by the output shaping circuit.

[0011] Preferably, the user uses configuration software to customize the input signal type and output signal type, the input current signal range is -100mA to 100mA, the input voltage signal range is -50V to 50V; the output current signal range is 0-20mA, and the output voltage signal range is 0-10V.

[0012] Preferably, the output current circuit includes an output shaping circuit, a voltage-current conversion circuit and an output switching module circuit. The output shaping circuit is connected to the back stage of the isolation chip. The voltage-current conversion circuit converts the DC voltage of the output shaping circuit into a DC current and transmits it to the output switching module circuit for output. The CPU control circuit can control the output switching module circuit.

[0013] Preferably, the power conversion module includes a voltage conversion circuit, a transformer coil drive circuit, a transformer and an AC voltage rectifier and filter circuit; the external 20-35VDC power supply is stabilized by the voltage conversion circuit and output to the transformer drive circuit, and the transformer drive circuit transfers the DC voltage after voltage conversion to the AC voltage rectifier and filter circuit through the transformer in an AC manner.

[0014] Preferably, the AC voltage rectification and filtering circuit includes an input channel AC voltage rectification and filtering circuit and an output channel AC voltage rectification and filtering circuit. The output channel AC voltage rectification and filtering circuit supplies the processed signal to the output shaping circuit, and the input channel voltage rectification and filtering circuit supplies the processed signal to the signal conversion circuit.

[0015] The multifunctional input-output signal interface module device has the following beneficial effects:

[0016] (1) The utility model supports multiple signal type inputs and multiple signal type outputs. When a DC signal within a specified range is connected, there is no need to cause the product to fail to work due to failure to distinguish between voltage and current signals.

[0017] (2) Since the present invention adopts embedded technology, the interface signal type and the output signal type are set by the internal CPU control circuit, and the user can customize the configuration.

[0018] (3) The utility model can also monitor the input signal and output signal types in real time and indicate them through indicator lights of different colors.

[0019] (4) The solution of the utility model supports one input and one output.

[0020] (5) The utility model can support the input and output of various types of signals and has an interface module with high integration, good scalability and adaptability to simplify system design, reduce costs and reduce space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : Schematic diagram of transmitter signal interface in the prior art;

[0022] Figure 2 : Schematic diagram of the signal interface of the utility model multifunctional input and output signal interface module device;

[0023] Figure 3 : A circuit block diagram of a multifunctional input-output signal interface module device of the utility model.

[0024] Description of reference numerals:

[0025] 1—power conversion module;

[0026] 2—Input acquisition module;

[0027] 3—output current circuit;

[0028] 11—voltage conversion circuit, through which the external 20-35VDC power supply is stabilized;

[0029] 12—Transformer coil drive circuit;

[0030] 13—Transformer;

[0031] 14—input channel AC voltage rectification and filtering circuit, which provides the processed signal to the signal conversion circuit;

[0032] 15—output channel AC voltage rectification and filtering circuit, which supplies the processed signal to the output shaping circuit;

[0033] 21—Signal acquisition circuit, which controls switching through an input switching circuit;

[0034] 22—Current acquisition and conversion circuit, which digitizes the analog signal and transmits it to the CPU control circuit;

[0035] 23—CPU control circuit, responsible for the control of signal acquisition circuit, the processing of digitalized signals of current acquisition and conversion circuit, the control of output signals of PWM output circuit, the enabling switching of input switching circuit and the control of output switching module circuit;

[0036] 24—PWM output circuit, the CPU transmits the PWM output after signal processing to the front stage of the isolation chip;

[0037] 25—input switching circuit, accepting the enable control of the CPU control circuit, completing the switching of the signal acquisition circuit;

[0038] 31—output shaping circuit, the PWM waveform output by the CPU control circuit is isolated and transmitted by the isolation chip and then converted into a DC voltage by this circuit;

[0039] 32—voltage-current conversion circuit, directly transmits or converts the DC voltage of the output shaping circuit into a DC current and transmits it to the output switching module circuit;

[0040] 33 - output switching module circuit, receives the control signal of the CPU control circuit, and outputs the transmitted DC voltage signal or DC current signal. DETAILED DESCRIPTION

[0041] Combine the following Figures 2 to 3 , the utility model is further described:

[0042] like Figure 1 As shown, the input of the utility model is connected to terminals 3-4, whether it is a DC current signal or a DC voltage signal. The input voltage and current range are customized through the configuration software to complete the signal collection; similarly, the output voltage signal and current signal can also be customized through the configuration software.

[0043] The user uses the configuration software to customize the input signal type and output signal type. The input current signal range is -100mA~100mA, the input voltage signal range is -50V~50V; the output current signal range is 0-20mA, and the output voltage signal range is 0-10V.

[0044] like Figure 3 As shown, the utility model multifunctional input-output signal interface module device comprises a power conversion module 1, an input acquisition module 2 and an output current circuit 3. The input end of the power conversion module 1 is connected to an external power supply, and the output end of the power conversion module 1 is divided into two paths for use by the input acquisition module 2 and the output current circuit 3 respectively; the back-end signal acquisition device of the DC interface or the back-end signal acquisition device of the voltage interface is connected to the input end of the input acquisition module 2; the input acquisition module 2 filters and amplifies the DC voltage signal or the DC current signal, and then sends it to the CPU to digitize the analog signal. The CPU performs PWM output on the signal, and after isolation by the isolation chip and the back-end modulation and demodulation circuit, it enters the output current circuit 3 and outputs the corresponding signal.

[0045] The input acquisition module 2 includes a signal acquisition circuit 21, a current acquisition and conversion circuit 22, a CPU control circuit 23, a PWM output circuit 24 and an input switching circuit 25; the signal acquisition circuit 21 is composed of two signal channels, which are switched by the CPU control circuit 23 under the control of the input switching circuit 25, and the two signal channels are divided into a DC current channel and a DC voltage channel; the current conversion circuit 22 digitizes the analog current from the signal acquisition circuit 21 and divides it into two paths and transmits them to the CPU control circuit 23 and the PWM output circuit 24 respectively; the CPU control circuit 23 is responsible for the enable switching of the input switching circuit 25, the processing of the digitized signal of the current acquisition and conversion circuit 22, and the control of the output signal of the PWM output circuit 24; the PWM output circuit 24 transmits the signal processed by the CPU control circuit 23 to the front stage of the isolation chip; the PWM waveform output by the CPU control circuit 23 through the PWM output circuit 24 is isolated and transmitted by the isolation chip, and then converted into a DC voltage by the output shaping circuit 31.

[0046] The user uses the configuration software to customize the input signal type and output signal type. The input current signal range is -100mA~100mA, the input voltage signal range is -50V~50V; the output current signal range is 0-20mA, and the output voltage signal range is 0-10V.

[0047] The output current circuit 3 includes an output shaping circuit 31, a voltage-current conversion circuit 32 and an output switching module circuit 33. The output shaping circuit 31 is connected to the back stage of the isolation chip. The voltage-current conversion circuit 32 converts the DC voltage of the output shaping circuit 31 into a DC current and transmits it to the output switching module circuit 33 for output. The CPU control circuit 23 can control the output switching module circuit 33.

[0048] The power conversion module 1 includes a voltage conversion circuit 11, a transformer coil drive circuit 12, a transformer 13 and an AC voltage rectifier filter circuit; the external 20-35VDC power supply is stabilized by the voltage conversion circuit 11 and output to the transformer drive circuit 12, and the transformer drive circuit 12 transfers the DC voltage after voltage conversion to the AC voltage rectifier filter circuit in an AC manner through the transformer 13. The AC voltage rectifier filter circuit includes an input channel AC voltage rectifier filter circuit 14 and an output channel AC voltage rectifier filter circuit 15, the output channel AC voltage rectifier filter circuit 15 supplies the processed signal to the output shaping circuit 31, and the input channel voltage rectifier filter circuit 14 supplies the processed signal to the signal conversion circuit 22.

[0049] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A multifunctional input-output signal interface module device, comprising a power conversion module (1), an input acquisition module (2) and an output current circuit (3), characterized in that: The input end of the power conversion module (1) is connected to an external power supply, and the output end of the power conversion module (1) is divided into two paths for use by the input acquisition module (2) and the output current circuit (3) respectively; The back-end signal acquisition device of the DC interface or the back-end signal acquisition device of the voltage interface is connected to the input end of the input acquisition module (2); the input acquisition module (2) filters and amplifies the DC voltage signal or the DC current signal, and then sends it to the CPU to digitize the analog signal. The CPU performs PWM output on the signal, and after isolation by the isolation chip and back-end modulation and demodulation circuit, the signal enters the output current circuit (3) and outputs the corresponding signal; The input acquisition module (2) comprises a signal acquisition circuit (21), a current acquisition and conversion circuit (22), a CPU control circuit (23), a PWM output circuit (24) and an input switching circuit (25); The signal acquisition circuit (21) is composed of two signal channels, which are switched by the input switching circuit (25) controlled by the CPU control circuit (23). The two signal channels are divided into a direct current channel and a direct voltage channel. The current conversion circuit (22) digitizes the analog current from the signal acquisition circuit (21) and divides it into two channels, which are respectively transmitted to the CPU control circuit (23) and the PWM output circuit (24). The CPU control circuit (23) is responsible for enabling and switching the input switching circuit (25), processing the digitized signal of the current acquisition and conversion circuit (22), and controlling the output signal of the PWM output circuit (24). The PWM output circuit (24) transmits the signal processed by the CPU control circuit (23) to the front stage of the isolation chip. The PWM waveform output by the CPU control circuit (23) through the PWM output circuit (24) is isolated and transmitted by the isolation chip, and then converted into a direct current voltage by the output shaping circuit (31).

2. The multifunctional input / output signal interface module device according to claim 1, characterized in that: The user uses the configuration software to customize the input signal type and output signal type. The input current signal range is -100mA~100mA, the input voltage signal range is -50V~50V; the output current signal range is 0-20mA, and the output voltage signal range is 0-10V.

3. The multifunctional input / output signal interface module device according to claim 2, characterized in that: The output current circuit (3) comprises an output shaping circuit (31), a voltage-current conversion circuit (32) and an output switching module circuit (33); the output shaping circuit (31) is connected to the rear stage of the isolation chip; the voltage-current conversion circuit (32) converts the DC voltage of the output shaping circuit (31) into a DC current and transmits it to the output switching module circuit (33) for output; and the CPU control circuit (23) is capable of controlling the output switching module circuit (33).

4. The multifunctional input / output signal interface module device according to claim 3, characterized in that: The power conversion module (1) comprises a voltage conversion circuit (11), a transformer coil drive circuit (12), a transformer (13) and an AC voltage rectification and filtering circuit; an external 20-35VDC power supply is stabilized by the voltage conversion circuit (11) and output to the transformer drive circuit (12); the transformer drive circuit (12) transmits the converted DC voltage to the AC voltage rectification and filtering circuit in an AC manner through the transformer (13).

5. The multifunctional input / output signal interface module device according to claim 4, characterized in that: The AC voltage rectification and filtering circuit comprises an input channel AC voltage rectification and filtering circuit (14) and an output channel AC voltage rectification and filtering circuit (15). The output channel AC voltage rectification and filtering circuit (15) supplies the processed signal to the output shaping circuit (31), and the input channel voltage rectification and filtering circuit (14) supplies the processed signal to the signal conversion circuit (22).

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