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Circuit of electrochemical sensor as well as use method and application of circuit

A sensor and electrochemical technology, applied in the field of circuit design of electrochemical sensors, can solve the problems of slowing down battery consumption, difficulty in miniaturization of sensors, and product performance that cannot meet the requirements of use, so as to avoid excessive power loss and ensure performance effect

Pending Publication Date: 2021-12-24
杭州亿联康医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution not only increases the cost, but also makes it difficult to miniaturize the design of the sensor
There are also some schemes that choose a compromise method, that is, select medium-performance components (including operational amplifiers) in the measurement circuit, which can indeed slow down the consumption of some batteries and prolong the service life of the battery, but in the measurement signal. Significant sacrifices are also made in performance, and even the performance of the product cannot meet the requirements of use

Method used

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  • Circuit of electrochemical sensor as well as use method and application of circuit
  • Circuit of electrochemical sensor as well as use method and application of circuit
  • Circuit of electrochemical sensor as well as use method and application of circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1 is the circuit and method of use of the two-electrode type electrochemical sensor of the present invention, the circuit is as Figure 1b shown. Sensor is an electrochemical sensor, C is a counter electrode, and W is a working electrode. The non-inverting input terminal 3 of the operational amplifier U1 of the circuit 100a inputs a reference voltage Vref, and is connected to the counter electrode C through the inverting input terminal 4 and the output terminal 1 of the operational amplifier U1. The non-inverting input terminal 5 of the operational amplifier U2 of the circuit 200 b inputs another voltage Vbis, and is connected to the working electrode W through the inverting input terminal 6 and output terminal 7 of the operational amplifier U2 and the switch 900 . Vref and Vbis are different, so a bias voltage is applied between the working electrode W and the counter electrode C. The non-inverting input terminal 5 of the operational amplifier U3 of the ci...

Embodiment 2

[0048] Embodiment 2 is the circuit and usage method of the three-electrode type electrochemical sensor described in the present invention, and the circuit is as Figure 2b shown. Sensor is an electrochemical sensor, R is a reference electrode, C is a counter electrode, and W is a working electrode. The non-inverting input terminal 3 of the operational amplifier U1 of the circuit 100b inputs a reference voltage Vref, and is connected to the reference electrode R through the inverting input terminal 4 of the operational amplifier U1, and the output terminal 7 of U1 is connected to the counter electrode C, so that when the sensor works Form a loop. The non-inverting input terminal 5 of the operational amplifier U2 of the circuit 200 b inputs another voltage Vbis, and is connected to the working electrode W through the inverting input terminal 6 and output terminal 7 of the operational amplifier U2 and the switch 900 . The non-inverting input terminal 5 of the operational amplif...

Embodiment 3

[0050] Embodiment 3 is the circuit and method of use of the four-electrode type electrochemical sensor, the circuit is as Figure 3b shown. Sensor is an electrochemical sensor, R is a reference electrode, C is a counter electrode, W is a working electrode, and A is an auxiliary electrode. Embodiment 3 and Embodiment 2 are basically the same, the difference is that it is necessary to add a circuit and a switch on the auxiliary electrode A: the circuit 300b is used for the auxiliary electrode A to maintain the bias voltage; the circuit 310 is used for the auxiliary electrode when the sensor is working Signal measurement of A; switch 900b, used for switching the auxiliary electrode circuit when the sensor is in standby and working. Therefore, the operational amplifiers U1, U2, and U4 in this embodiment may use low-power devices as described in Embodiment 1; the operational amplifiers U3 and U5 may use high-performance devices as described in Embodiment 1. Similarly, when the se...

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PUM

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Abstract

The invention relates to a circuit of an electrochemical sensor and a use method of the circuit.The circuit comprises an electrochemical sensor, a control circuit and a measuring circuit, and a change-over switch is arranged between the control circuit and the measuring circuit; the control circuit provides bias voltage for the electrode of the electrochemical sensor, is a low-power-consumption circuit and comprises a low-power-consumption operational amplifier. The measuring circuit comprises a low-noise and high-precision operational amplifier which is used for signal detection when the electrochemical sensor works. When the electrochemical sensor does not work, the stability of the sensor can be kept, frequent battery replacement caused by too fast electric quantity loss can be avoided, and long stabilization time of the sensor after battery replacement can be avoided; when the electrochemical sensor works, low noise and high precision of a measurement result are ensured. The circuit is low in power consumption and high in detection precision, and can be applied to the detection of electrochemical sensors for gas concentrations, such as exhaled gas nitric oxide concentration.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to a circuit design and use method of an electrochemical sensor. Background technique [0002] Electrochemical sensors have many advantages such as high efficiency, simplicity, sensitivity, speed, easy miniaturization, integration, and low power consumption. In recent years, with the rapid development of electrochemistry, materials science, biology and other related disciplines, electrochemical sensors Sensors have been widely used in the automotive industry, environmental monitoring, food safety, clinical diagnosis and other fields. [0003] The working principle of the electrochemical sensor is to place the substance to be tested in an electrochemical reaction cell in an appropriate form, measure the change of its electrochemical parameters (such as potential, current, conductance), and realize the determination of the content of the substance to be tested. Electrochemical sensors c...

Claims

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Application Information

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IPC IPC(8): G01N27/416
CPCG01N27/416
Inventor 胡锡江章子毅王天星
Owner 杭州亿联康医疗器械有限公司