CN115144341A

CN115144341A - Flexible wearable quantum dot spectrum sensor circuit

Info

Publication number: CN115144341A
Application number: CN202210364088.XA
Authority: CN
Inventors: 刘兆海; 刘向; 陶治; 匡文剑; 黄昱凌
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-10-04

Abstract

The invention relates to a flexible wearable quantum dot spectrum sensor circuit, which comprises a signal acquisition module, a signal processing module and a signal processing module, wherein the signal acquisition module is used for acquiring optical signals and then processing the optical signals into analog signals; the power supply module is used for controlling the power supply of the signal acquisition module; the analog-to-digital conversion chip is used for receiving an analog signal, converting the analog signal into a digital signal and outputting the digital signal to the digital signal processor for information processing; the signal acquisition module, the power module and the analog-to-digital conversion chip are all integrated on the flexible fpc substrate, so that the sensor circuit has a flexible wearable function. The quantum dot spectrum detector, the acquisition module, the power supply module and the analog-to-digital conversion chip are integrated on the flexible fpc substrate, so that the circuit is simplified, the quantum dot spectrum detector can be applied to a flexible wearable device, the application range of the quantum dot spectrum sensor is greatly expanded, and meanwhile, the sensitivity of the circuit is improved and the noise is reduced by adopting the Feampere-grade input bias current operational amplifier and using high-resistance feedback.

Description

Flexible wearable quantum dot spectrum sensor circuit

Technical Field

The invention relates to the technical field of spectrum sensors, in particular to a flexible wearable quantum dot spectrum sensor circuit.

Background

At present, no matter in the industrial production or living field, the sensor has been greatly applied, and the rapid detection instrument for identifying information such as metal components, content, corrosion and the like in the industrial field has been greatly developed, while the traditional sensor has large volume, is very heavy and expensive to use, cannot meet the requirement of portability and cannot be applied to the wearable field.

Present quantum dot spectral sensor can be accurate quick discernment metal content, gas composition, be convenient for equip on a large scale to expand the range of application of quick detection technique in industrial field, quantum dot spectral sensor has small characteristics with low costs simultaneously, can wide application in life detection area, but solitary quantum dot spectral sensor circuit structure is complicated, can not satisfy the multi-scene and use, consequently, this application provides a flexible wearable quantum dot spectral sensor circuit in order to solve above-mentioned problem.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a flexible wearable quantum dot spectrum sensor circuit, which is designed by taking a flat grating-free quantum dot spectrum detector based on a TFT integrated sensing core as a core, has a simple circuit structure, can be applied to a flexible wearable device, and greatly expands the application range of the sensor.

In order to achieve the purpose, the invention provides the following technical scheme: a flexible wearable quantum dot spectrum sensor circuit comprises a signal acquisition module, a signal processing module and a signal processing module, wherein the signal acquisition module is used for acquiring optical signals and then processing the optical signals into analog signals; the power supply module is used for controlling the power supply of the signal acquisition module; the analog-to-digital conversion chip is used for receiving an analog signal, converting the analog signal into a digital signal and outputting the digital signal to the digital signal processor for information processing; the signal acquisition module, the power module and the analog-to-digital conversion chip are integrated on the flexible fpc substrate, so that the sensor circuit has a flexible wearable function.

Further, the signal acquisition module comprises a Feampere-grade input bias current operational amplifier, an instrument amplifier and a quantum dot spectrum detector.

Furthermore, the output end of the quantum dot spectrum detector is in signal connection with the input end of a Feampere-grade input bias current operational amplifier, a feedback loop is arranged in the Feampere-grade input bias current operational amplifier and used for amplifying signals and reducing noise, the output end of the Feampere-grade input bias current operational amplifier is in signal connection with the input end of an instrument amplifier, the output end of the instrument amplifier is in signal connection with the input end of an analog-to-digital conversion chip, and the instrument amplifier amplifies the signals, so that the signal amplitude meets the requirements of the analog-to-digital conversion chip.

Further, the power module comprises a synchronous rectification boost IC and a polarity reversal power converter.

Further, a feedback loop with a capacitor is arranged in the synchronous rectification boosting IC to reduce noise of an external power supply, and the polarity inversion power supply converter provides positive and negative voltages required by the FeiAmp level input bias current operational amplifier.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

this flexible wearable quantum dot spectrum sensor circuit, through with quantum dot spectrum detector, collection module, power module, the analog-to-digital conversion chip is integrated to flexible fpc base plate, simplify the circuit, make quantum dot spectrum detector can apply to flexible wearable device in, very big expansion quantum dot spectrum sensor's application range, and simultaneously, adopt the input bias current operational amplifier of class of flying an ampere to improve circuit sensitivity and use high resistance feedback noise reduction, in addition, still adopt low noise power module, reduce the influence of the noise of power to quantum dot spectrum sensor.

Drawings

FIG. 1 is a schematic circuit diagram of the present invention;

FIG. 2 is a pcb layout and a manufactured flexible sensing circuit designed and completed by the present invention;

FIG. 3 is a waveform diagram illustrating sensor signal detection according to the present invention;

FIG. 4 shows the signal detection results of the quantum dot spectrum detector under different environments.

In the figure: the system comprises a 1-Fei' an-level input bias current operational amplifier, a 2-meter amplifier, a 3-synchronous rectification boosting IC, a 4-polarity-reversal power converter, a 5-analog-to-digital conversion chip, a 6-flexible fpc substrate and a 7-quantum-dot spectral detector.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the flexible wearable quantum dot spectrum sensor circuit comprises a signal acquisition module, a power module, an analog-to-digital conversion chip 5 and a flexible fpc substrate 6, wherein the signal acquisition module is used for acquiring optical signals and then processing the optical signals into analog signals, the power module is used for controlling power supply of the signal acquisition module, the analog-to-digital conversion chip 5 is used for receiving the analog signals, converting the analog signals into digital signals and then outputting the digital signals to a digital signal processor for information processing, and the signal acquisition module, the power module and the analog-to-digital conversion chip 5 are all integrated on the flexible fpc substrate 6 to enable the sensor circuit to have a flexible wearable function.

The signal acquisition module comprises a Feian level input bias current operational amplifier 1, an instrument amplifier 2 and a quantum dot spectrum detector 7, wherein the output end of the quantum dot spectrum detector 7 is in signal connection with the input end of the Feian level input bias current operational amplifier 1, a feedback loop is arranged in the Feian level input bias current operational amplifier 1 and used for amplifying signals and reducing noise, the output end of the Feian level input bias current operational amplifier 1 is in signal connection with the input end of the instrument amplifier 2, the output end of the instrument amplifier 2 is in signal connection with the input end of an analog-to-digital conversion chip 5, the instrument amplifier 2 amplifies the signals to enable the signal amplitude to meet the requirements of the analog-to-digital conversion chip 5, and when the signal acquisition module works, the signals of the quantum dot spectrum detector 7 manufactured on a TFT film are read through the Feian level input bias current operational amplifier 1, noise is reduced through the feedback loop, the acquired and amplified signals are amplified through the instrument amplifier 2 and then transmitted to the analog-to-digital conversion chip 5 to be converted into digital signals for processing.

The power module comprises a synchronous rectification boosting IC3 and a polarity inversion power converter 4, a feedback loop with a capacitor is arranged in the synchronous rectification boosting IC3, noise of an external power supply can be reduced by the aid of the built-in feedback loop with the capacitor, noise of a sensor is reduced, signal-to-noise ratio is improved, sensitivity of the sensor is improved, and the polarity inversion power converter 4 provides positive and negative voltages required by the FeiAmp level input bias current operational amplifier 1.

The quantum dot spectrum detector 7 collects optical signals and then transmits the signals into a signal input end of the FeiAmp level input bias current operational amplifier 1, the FeiAmp level input bias current operational amplifier 1 amplifies the signals through a feedback loop and simultaneously reduces noise, the output signal of the FeiAmp level input bias current operational amplifier 1 is further amplified through an instrument amplifier 2 to enable the signal amplitude to meet the requirements of an analog-to-digital conversion chip 5, meanwhile, a synchronous rectification boosting IC3 reduces external power supply noise through feedback with a capacitor, a polarity inversion power supply converter 4 provides positive and negative voltages required for the FeiAmp level input bias current operational amplifier 1, the analog-to-digital conversion chip 5 converts the input analog signals into digital signals and outputs the digital signals to a digital signal processor for information processing, all devices on a flexible fpc substrate 6 can normally operate as shown in figures 3 and 4, meanwhile, the higher sensitivity of the quantum dot spectrum detector 7 is kept, and a bendable circuit can realize a flexible wearable function through the flexible fpc substrate 6, and the use convenience and application range of the sensor are greatly improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A flexible wearable quantum dot spectrum sensor circuit is characterized by comprising

The signal acquisition module is used for acquiring optical signals and then processing the optical signals into analog signals;

the power supply module is used for controlling the power supply of the signal acquisition module;

the analog-to-digital conversion chip (5) is used for receiving an analog signal, converting the analog signal into a digital signal and outputting the digital signal to the digital signal processor for information processing;

the flexible fpc substrate (6), the signal acquisition module, the power module and the analog-to-digital conversion chip (5) are integrated on the flexible fpc substrate (6) so that the sensor circuit has a flexible wearable function.

2. The flexible wearable quantum dot spectral sensor circuit of claim 1, wherein: the signal acquisition module comprises a flying safety level input bias current operational amplifier (1), an instrument amplifier (2) and a quantum dot spectrum detector (7).

3. The flexible wearable quantum dot spectroscopic sensor circuit of claim 2, wherein: the output end of the quantum dot spectral detector (7) is in signal connection with the input end of the FeiAmp level input bias current operational amplifier (1), a feedback loop is arranged in the FeiAmp level input bias current operational amplifier (1) and used for reducing noise while amplifying signals, the output end of the FeiAmp level input bias current operational amplifier (1) is in signal connection with the input end of the instrument amplifier (2), the output end of the instrument amplifier (2) is in signal connection with the input end of the analog-to-digital conversion chip (5), and the instrument amplifier (2) amplifies the signals to enable the signal amplitude to meet the requirements of the analog-to-digital conversion chip (5).

4. The flexible wearable quantum dot spectral sensor circuit of claim 1, wherein: the power supply module comprises a synchronous rectification boost IC (3) and a polarity inversion power supply converter (4).

5. The flexible wearable quantum dot spectral sensor circuit of claim 4, wherein: the synchronous rectification boost IC (3) is internally provided with a feedback loop with a capacitor and used for reducing noise of an external power supply, and the polarity inversion power supply converter (4) provides positive and negative voltages required by the FeiAmp-level input bias current operational amplifier (1).