CN215297568U

CN215297568U - Adjustable ADC collection system

Info

Publication number: CN215297568U
Application number: CN202120499479.3U
Authority: CN
Inventors: 沈炜
Original assignee: Hangzhou Yuming Electronic Technology Co ltd
Current assignee: Hangzhou Yuming Electronic Technology Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-12-24
Anticipated expiration: 2031-03-09

Abstract

The utility model discloses an adjustable ADC acquisition device, wherein, a signal detection circuit is used for detecting the signal type of a circuit to be detected and transmitting detection data to an MCU; the MCU controls an output channel of the channel selection circuit according to the data transmitted by the signal detection circuit, and a first output end of the channel selection circuit transmits the received signal to the ADC module after filtering and amplifying the signal by the filter circuit and the signal amplification circuit in sequence; the ADC module converts the received signal and outputs the converted signal to the MCU; the isolation module performs photoelectric isolation between the ADC module and the MCU; the second output end of the channel selection circuit transmits the received signal to the input end of the isolation module. The utility model discloses a set up signal detection circuit, passageway selection circuit and MCU cooperation and realized the detection and the lane output to the circuit signal that awaits measuring, can judge the signal type fast to select different output channel, improve signal acquisition speed, improve collection efficiency.

Description

Adjustable ADC collection system

Technical Field

The utility model belongs to the technical field of the electronic circuit, especially, relate to an adjustable ADC collection system.

Background

In the field of electronic product production, electronic product finished products or semi-products are usually tested to perform quality inspection on the electronic products. The quantity that the test process needs to gather is the relevant electric current and the voltage of electronic product, and the test process is that the corresponding port of using measurement integrated circuit board to be connected to electronic product, then gathers electric current and voltage, converts analog into digital signal through the ADC conversion function of measurement integrated circuit board, then uploads digital signal to the host computer, utilizes the host computer to carry out the analysis to the electric current and the voltage data that gather.

The ADC acquisition system requires a stable power environment to ensure that the ADC acquisition system is not affected by other parts of the circuit. In addition, the ADC acquisition system is directly connected with an external signal, so that external interference is easily brought to the MCU control system, and the stability of the system is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adjustable ADC acquisition device, which realizes the detection and the channel output of the circuit signal to be detected by the cooperation of a signal detection circuit, a channel selection circuit and an MCU; the signal type can be judged quickly, different output channels are selected, the signal acquisition speed is increased, and the acquisition efficiency is improved.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to an adjustable ADC acquisition device, which comprises a signal detection circuit, an ADC module, an isolation module and an MCU; the input end of the signal detection circuit is electrically connected with the circuit to be detected; one end of the signal detection circuit is electrically connected with the MCU; the MCU is electrically connected with a channel selection circuit; the signal detection circuit is used for detecting the signal type of the circuit to be detected and transmitting detection data to the MCU; the signal of the circuit to be detected is transmitted to the input end of the channel selection circuit through the signal detection circuit; the signal types comprise digital signals and analog signals; the MCU controls an output channel of the channel selection circuit according to data transmitted by the signal detection circuit, and the output channel comprises a first output end and a second output end; the first output end of the channel selection circuit transmits the received signal to the ADC module after the signal is filtered and amplified by the filter circuit and the signal amplification circuit in sequence; the ADC module converts the received signal and outputs the converted signal to the MCU; the isolation module is connected between the ADC module and the MCU, and the isolation module performs photoelectric isolation between the ADC module and the MCU; the second output end of the channel selection circuit transmits the received signal to the input end of the isolation module; the ADC module is also electrically connected with a clock chip, and the clock chip is used for providing clock signals for the ADC module; the MCU is electrically connected with a communication module and is in information interaction with the upper computer through the communication module.

Furthermore, the filter circuits all adopt low-pass filters; the filter circuit carries out filtering processing on the received current signal.

Further, the signal amplification circuit amplifies the filtered current signal.

Further, the ADC module performs data acquisition according to a clock signal provided by the clock chip; the root-mean-square jitter of the clock signal generated by the clock chip is less than 400 fs.

Further, the communication module is an RS485 communication module.

Further, the isolation module adopts an optical coupler.

The utility model discloses following beneficial effect has:

the utility model discloses a set up signal detection circuit, passageway selection circuit and MCU cooperation, realized the detection and the lane output to the circuit signal that awaits measuring, can judge the signal type fast to select different output channel, improve signal acquisition speed, improve collection efficiency.

Drawings

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

Fig. 1 is a system block diagram of an adjustable ADC acquisition device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1, the utility model relates to an adjustable ADC collecting device, which comprises a signal detection circuit, an ADC module, an isolation module and an MCU; the input end of the signal detection circuit is electrically connected with the circuit to be detected; one end of the signal detection circuit is electrically connected with the MCU; the MCU is electrically connected with a channel selection circuit;

the signal detection circuit is used for detecting the signal type of the circuit to be detected and transmitting detection data to the MCU;

the signal of the circuit to be detected is transmitted to the input end of the channel selection circuit through the signal detection circuit; the signal types comprise digital signals and analog signals;

the MCU controls an output channel of the channel selection circuit according to the data transmitted by the signal detection circuit, and the output channel comprises a first output end and a second output end; the first output end outputs an analog signal, and the second output end outputs a digital signal;

the first output end of the channel selection circuit transmits the received signal to the ADC module after filtering and amplifying the signal by the filter circuit and the signal amplifying circuit in sequence; the ADC module converts the received signal and outputs the converted signal to the MCU; the filter circuits all adopt low-pass filters; the filter circuit carries out filtering processing on the received current signal; the signal amplification circuit amplifies the filtered current signal;

the isolation module is connected between the ADC module and the MCU, and the isolation module carries out photoelectric isolation between the ADC module and the MCU; the isolation module adopts an optical coupler;

the second output end of the channel selection circuit transmits the received signal to the input end of the isolation module;

the ADC module is also electrically connected with a clock chip, and the clock chip is used for providing a clock signal for the ADC module; the ADC module acquires data according to a clock signal provided by the clock chip; the root-mean-square jitter of a clock signal generated by the clock chip is less than 400 fs;

the MCU is electrically connected with a communication module and is in information interaction with the upper computer through the communication module; the communication module is an RS485 communication module.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable ADC acquisition device is characterized by comprising a signal detection circuit, an ADC module, an isolation module and an MCU; the input end of the signal detection circuit is electrically connected with the circuit to be detected; one end of the signal detection circuit is electrically connected with the MCU; the MCU is electrically connected with a channel selection circuit;

the MCU controls an output channel of the channel selection circuit according to data transmitted by the signal detection circuit, and the output channel comprises a first output end and a second output end;

the first output end of the channel selection circuit transmits the received signal to the ADC module after the signal is filtered and amplified by the filter circuit and the signal amplification circuit in sequence; the ADC module converts the received signal and outputs the converted signal to the MCU;

the isolation module is connected between the ADC module and the MCU, and the isolation module performs photoelectric isolation between the ADC module and the MCU;

the ADC module is also electrically connected with a clock chip, and the clock chip is used for providing clock signals for the ADC module;

the MCU is electrically connected with a communication module and is in information interaction with the upper computer through the communication module.

2. The adjustable ADC acquisition device of claim 1, wherein the filter circuits are low pass filters; the filter circuit carries out filtering processing on the received current signal.

3. The adjustable ADC acquisition device of claim 1, wherein the signal amplification circuit amplifies the filtered current signal.

4. The adjustable ADC acquisition device according to claim 1, wherein the ADC module performs data acquisition according to a clock signal provided by a clock chip; the root-mean-square jitter of the clock signal generated by the clock chip is less than 400 fs.

5. The adjustable ADC acquisition device of claim 1, wherein the communication module is an RS485 communication module.

6. An adjustable ADC acquisition device according to claim 1, wherein said isolation module employs an optocoupler.