Self-adaptive high-precision digital visual small signal detection equipment

Abstract

The utility model discloses a self-adaptive high-precision digital visual small signal detection device, which comprises a signal sensor, an amplifying circuit, a filter circuit, a processing circuit switching module, an analog-to-digital coarse converter, an analog-to-digital fine converter, a processor and a display. After the signal sensor collects a signal, the signal is amplified and filtered, the processing circuit switching module firstly gates the analog-to-digital coarse converter to obtain a coarse measurement value, the processor controls the analog-to-digital coarse converter to be switched to a proper analog-to-digital fine converter for further conversion according to the coarse measurement value, and a final result is displayed by the display. The utility model relates to the technical field of signal detection. According to the utility model, the problem that the existing small signal detection technology has a plurality of deficiencies in the aspects of precision, anti-interference capability, digital storage, adaptability to different detection requirements and the like is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal detection technical field especially, it relates to a kind of self-adapting high-precision digital visual little signal detection equipment. BACKGROUND

[0002] In the numerous fields of modern science and technology, small signal detection technology occupies a crucial position. For example, in the field of measuring instruments, accurate measurement of weak physical quantity changes relies on high-precision small signal detection; in medical equipment, accurate detection of weak physiological signals of the human body (such as electrocardiogram, electroencephalogram signals, etc.) is indispensable for disease diagnosis and treatment monitoring; in communication equipment, reliable small signal detection technology is needed to ensure communication quality for receiving and demodulating weak communication signals.

[0003] At present, the common small signal detection methods mainly have the following two types, but each has obvious shortcomings:

[0004] First, traditional circuits such as amplifiers and filters are used for detection, and the results are presented through instrument pointer method. This method has many drawbacks because it does not perform analog-to-digital conversion and only relies on pointer degrees to read the results. First, its precision is not high, the resolution of the pointer is limited, it is difficult to accurately reflect the change of small signal, and it is easy to cause measurement error. Second, the anti-interference ability is poor, and external environmental electromagnetic interference and other factors can easily affect the stability of the pointer, leading to inaccurate measurement results. Third, it cannot realize digital storage of results, which is not conducive to subsequent analysis, processing and long-term preservation of data, and it is difficult to meet the needs of the development of modern digital technology.

[0005] Second, the small signal is first amplified, filtered, etc., and then converted to digital display through analog-to-digital conversion. However, this method solves the problem of digital display to some extent, but still has defects. The analog-to-digital conversion chip itself has a certain resolution limit and cannot completely collect the actual value of the analog signal output by the signal channel unit. In the subsequent coherent demodulation and other signal processing processes, this incomplete collection will introduce errors and affect the accuracy of signal processing. Therefore, this method also has the problem of insufficient precision, and it is difficult to determine the true quality of the detected signal, and the entire detection system often only meets the detection requirements under certain conditions, lacks universality and flexibility, and is not up to the task when faced with complex and variable detection requirements.

[0006] In summary, the existing small signal detection technology has many shortcomings in terms of precision, anti-interference ability, digital storage, and adaptability to different detection requirements, and there is an urgent need for a new small signal detection device to overcome these defects to meet the growing demand for high-precision small signal detection in the development of modern science and technology. UTILITY MODEL CONTENTS

[0007] In order to solve the problems of the prior small signal detection technology in precision, anti-interference ability, digital storage and adaptability to different detection requirements, the utility model discloses a kind of self-adapting high-precision digital visual small signal detection equipment.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of self-adapting high-precision digital visual small signal detection equipment, comprising:

[0009] Signal sensor is used to collect signal to be detected;

[0010] Amplification circuit is connected with signal sensor, for amplifying signal;

[0011] Filter circuit is connected with amplification circuit, for filtering noise interference;

[0012] Processing circuit switching module is connected with filter circuit, for switching processing circuit to transmit signal to different analog-digital converter and process;

[0013] Analog-digital coarse converter is connected with processing circuit switching module, for initially converting analog signal into digital signal, and the analog range of conversion covers the range of equipment nominal;

[0014] Analog-digital fine converter is connected with processing circuit switching module, for converting analog signal into high-precision digital signal, and the analog measurement range of conversion is much smaller than analog-digital coarse converter, and the analog range of conversion of multiple analog-digital fine converters in system is the subset of the conversion range of analog-digital coarse converter, and the conversion range of analog-digital coarse converter is less than or equal to the union of the analog range of conversion of multiple analog-digital fine converters in system;

[0015] Processor is connected with analog-digital coarse converter and analog-digital fine converter, for receiving and processing digital signal, and simultaneously controlling circuit switching module to switch and select analog-digital conversion module according to processing result;

[0016] Display is connected with processor, for displaying signal value after processing.

[0017] Preferably, the processing circuit switching module adopts multi-channel analog switch to ensure that analog signal is not distorted and switched to different analog-digital conversion circuits.

[0018] Preferably, the analog-digital conversion is not limited to one layer of conversion, and after analog-digital fine conversion, the next round and more rounds of analog-digital fine conversion modules with smaller range are entered according to the result.

[0019] Preferably, when the processing circuit switching module selects the analog-digital coarse converter channel to convert, if the conversion result exceeds the range, the processor displays the out-of-range warning on the display; if the conversion result is within the range, the processor determines which range of the analog-digital fine converter needs to be selected for further conversion according to the value of the first analog-digital coarse conversion, and then drives the processing circuit switching module to switch to the corresponding analog-digital fine converter for conversion and present the result on the display.

[0020] Compared with the prior art, the utility model realizes the beneficial effect that:

[0021] 1、The utility model discloses a rough value is obtained through analog-digital coarse conversion, and further processing is switched to the appropriate analog-digital fine converter, effectively improve the measurement precision, solve the problem of traditional detection precision deficiency.

[0022] 2、The utility model discloses a filter circuit filters out noise, reduces the influence of external interference, compared with traditional pointer type detection method, the result is more accurate and reliable, can work stably in complex environment.

[0023] 3、The utility model discloses the realization signal digitization conversion and display, convenient for reading, storage, analysis and with other digital equipment cooperation, avoid human reading error, benefit automation processing.

[0024] 4、The utility model discloses the range of analog-digital coarse converter and fine converter can be switched automatically according to the signal size, adapts to different range small signal detection, and the application scene is wide.

[0025] 5、The utility model discloses analog-digital conversion mode can be nested, can carry out multiple precision conversion and improve precision as needed, satisfies the demand of high-precision detection scene.

[0026] 6、The utility model discloses the processing circuit switching module adopts multiple analog switches, ensures that the signal is not distorted switching, improves the overall performance and reliability of the equipment. DRAWINGS

[0027] The utility model will be further explained in detail in combination with the drawings and specific embodiments:

[0028] Figure 1 It is the overall structure schematic drawing of the utility model.

[0029] In the drawing: 1, signal sensor;2, amplifier circuit;3, filter circuit;4, processing circuit switching module;5, analog-digital coarse converter;6, analog-digital fine converter;7, processor;8, display. SPECIFIC EMBODIMENTS

[0030] The following embodiments of the present application are illustrated by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0031] Please refer to Figure 1 It is understood that the structure, proportion, size, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions that the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship is also considered as the scope of the present application without substantially changing the technical content.

[0032] The present application provides a technical solution: a self-adaptive high-precision digital visual small signal detection device, comprising:

[0033] The signal sensor 1 is used as a front-end component for acquiring the signal to be detected, and its type can be selected according to the specific detection object. For example, when detecting a sound signal, a microphone sensor is selected. The signal sensor 1 transmits the collected signal to be detected to the amplification circuit 2.

[0034] The amplification circuit 2 amplifies the weak signal from the signal sensor 1, enhances the signal strength for subsequent processing. The amplified signal then enters the filter circuit 3, which uses appropriate filtering techniques such as low-pass, high-pass, band-pass, etc. filter mode, effectively filters out noise interference in the signal, thereby obtaining a relatively pure analog signal.

[0035] The filtered analog signal reaches the processing circuit switching module 4. The processing circuit switching module 4 can select a high-quality multi-channel analog switch, which can ensure that the analog signal is not distorted during switching transmission, and accurately transmits the signal to different analog-to-digital converters. It is connected with the analog-to-digital coarse converter 5 and the analog-to-digital fine converter 6, and selects the appropriate analog-to-digital conversion channel according to the control instruction of the processor 7.

[0036] The analog-to-digital coarse converter 5 is responsible for the preliminary analog-to-digital conversion of the analog signal. The analog quantity range of its conversion is designed to cover the nominal range of the device, so that regardless of the size of the input signal, a rough measurement value can be given within its accuracy range. For example, if the device nominal range is -10V to +10V, the analog-to-digital coarse converter 5 can convert the analog signal within this range.

[0037] The analog-to-digital fine converter 6 is used to convert the analog signal into a high-precision digital signal. The analog measurement range of its conversion is much smaller than that of the analog-to-digital coarse converter 5, for example, the analog-to-digital coarse converter 5 has a range of -10V to +10V, and the analog-to-digital fine converter 6 can have a range of -1V to +1V, etc. The analog range of multiple analog-to-digital fine converters 6 is a subset of the conversion range of the analog-to-digital coarse converter 5, and the conversion range of the analog-to-digital coarse converter 5 is less than or equal to the union of the conversion ranges of all analog-to-digital fine converters 6, so that high-precision conversion of signals of different sizes can be achieved by switching.

[0038] The processor 7 receives digital signals from the analog-to-digital coarse converter 5 and the analog-to-digital fine converter 6. It judges the coarse measurement value from the analog-to-digital coarse converter 5, and controls the processing circuit switching module 4 to select the appropriate analog-to-digital fine converter 6 for further conversion according to the value size. The processor 7 is also responsible for processing the final high-precision digital signal, such as data correction, calculation, etc., and then transmitting the processed signal value to the display 8 for display. The display 8 uses appropriate display technology, such as liquid crystal display screen LCD or organic light-emitting diode display screen OLED, etc., to directly show the detection results to the user.

[0039] Taking the detection of a sound signal as an example, the microphone sensor 1 collects the sound signal, which is amplified by the amplification circuit 2 and then filtered by the filtering circuit 3 to remove noise interference. The processing circuit switching module 4 first switches the signal path to the analog-to-digital coarse converter 5.

[0040] The analog-to-digital coarse converter 5 converts the sound signal into a coarse measurement value. If the value exceeds the nominal range of the device, such as when the sound signal is too strong and the level exceeds the set range, the processor 7 judges and displays an out-of-range warning on the display 8, prompting the user that the signal is abnormal.

[0041] If the conversion result is within the range, the processor 7 obtains the coarse measurement value and judges which range of analog-to-digital fine converter 6 needs to be selected for further conversion according to the size of the value. For example, if the coarse measurement value is small, the processor 7 will drive the processing circuit switching module 4 to switch to a low-range analog-to-digital fine converter 6 for conversion.

[0042] The selected analog-to-digital fine converter 6 converts the sound signal into a high-precision digital signal result, which is processed by the processor 7 and accurately displayed on the display 8 with relevant parameters of the sound signal, such as level, frequency, etc., according to actual detection needs.

[0043] In addition, the analog-digital conversion of the utility model is not limited to the above-mentioned one layer coarse conversion and fine conversion mode. In actual application, if there is higher requirement on measurement accuracy, nested conversion can be carried out. Namely, after analog-digital fine conversion, according to the result, enter the next round or more rounds of analog-digital fine conversion module with smaller range, further improve the measurement accuracy. For example, the result after the first analog-digital fine conversion still has the space of improving the accuracy, can switch to the more accurate analog-digital fine conversion module again to carry out secondary or even multiple conversion, each conversion can more accurately acquire the detail information of the signal, thereby satisfying the complex demand of various high-precision signal detection. The flexible design makes the device can adapt to different fields, different accuracy requirement small signal detection task, plays an important role in the occasion such as measurement instrument, medical equipment, communication equipment and many other high-precision small signal detection.

[0044] The above embodiments only illustrate the principle and effect of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A self-adapting high-precision digital visualized small signal detection device, characterized in that, The application relates to a signal processing device, comprising: a signal sensor (1) for collecting a signal to be detected; an amplification circuit (2) connected with the signal sensor (1) for amplifying the signal; a filter circuit (3) connected with the amplification circuit (2) for filtering out noise interference; a processing circuit switching module (4) connected with the filter circuit (3) for switching the processing circuit to transmit the signal to different analog-digital converters for processing; an analog-digital coarse converter (5) connected with the processing circuit switching module (4) for initially converting an analog signal into a digital signal, wherein the analog quantity range converted by the analog-digital coarse converter (5) covers the range of the nominal quantity of the device; an analog-digital fine converter (6) connected with the processing circuit switching module (4) for converting an analog signal into a high-precision digital signal, wherein the analog quantity measurement range converted by the analog-digital fine converter (6) is much smaller than that of the analog-digital coarse converter (5), and the analog quantity range converted by a plurality of analog-digital fine converters (6) in the system is a subset of the analog quantity range converted by the analog-digital coarse converter (5), and the analog quantity range converted by the analog-digital coarse converter (5) is smaller than or equal to the union of the analog quantity ranges converted by the plurality of analog-digital fine converters (6) in the system; a processor (7) connected with the analog-digital coarse converter (5) and the analog-digital fine converter (6) for receiving and processing the digital signal, and simultaneously controlling the circuit switching module (4) to switch and select the analog-digital conversion module according to the processing result; a display (8) connected with the processor (7) for displaying the processed signal value.

2. The self-adapting high-precision digital visualized small signal detection device according to claim 1, characterized in that: The processing circuit switching module (4) adopts a multi-channel analog switch to ensure that the analog signal is not distorted when being switched to different analog-digital conversion circuits.

3. The self-adapting high-precision digital visualized small signal detection device according to claim 1, characterized in that: The analog-digital conversion is not limited to one layer of conversion, and after the analog-digital fine conversion, the result is entered into the next round and more rounds of the analog-digital fine conversion module with a smaller range.

4. The self-adapting high-precision digital visualized small signal detection device according to claim 1, characterized in that: When the processing circuit switching module (4) selects the channel of the analog-digital coarse converter (5) for analog-digital conversion, if the conversion result exceeds the range, the processor (7) judges and displays the out-of-range warning on the display (8); if the conversion result is within the range, the processor (7) judges which range of the analog-digital fine converter (6) needs to be selected for further conversion according to the value of the first analog-digital coarse conversion, and then drives the processing circuit switching module (4) to switch to the corresponding analog-digital fine converter (6) for conversion and presents the result on the display (8).

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