Photoelectric detection processing system of colloidal gold analyzer

Abstract

The utility model discloses a photoelectric detection processing system, belongs to the technical field of colloidal gold analysis equipment, and particularly relates to a photoelectric detection processing system of a colloidal gold analyzer, which comprises a detection module, an operational amplification module, an integrated logarithmic amplification module, a filtering module and a buffer isolation module, the output end of the detection module is connected with the input end of the transport amplification module, the input end of the integrated logarithmic amplification module is connected with the output end of the operational amplification module, and the input end of the filtering module is connected with the output end of the integrated logarithmic amplification module. The input end of the buffer isolation module is connected with the output end of the filtering module, and the output end of the buffer isolation module outputs signals to a controller. The noise suppression device has excellent noise suppression capability, can well amplify the signals to ensure the stability of the signals, filters the generated noise-containing signals, and improves the noise suppression efficiency. And the filtering signal can basically keep useful components of the original signal and is relatively smooth.

Description

TECHNICAL FIELD

[0001] The utility model discloses a photoelectricity detection processing system belongs to colloidal gold analysis equipment technical field, specifically related to a colloidal gold analysis appearance photoelectricity detection processing system. BACKGROUND

[0002] Colloidal gold analysis appearance is usually used for immunochromatography detection, such as rapid diagnostic test paper, such as early pregnancy detection, infectious disease detection etc. They detect the signal on test paper through optical method, such as the intensity change of reflected light or transmitted light, to judge the result. Among them, colloidal gold analysis appearance detects through photoelectricity detection module, and the principle of photoelectricity detection module is to utilize photoelectric device to convert the radiation signal of light into electric signal and carry out information processing. But in photoelectricity detection circuit, the interference such as background noise, stray light incidence exists to the weak signal that is detected. On the other hand, the internal noise of photoelectric device, the capacitance and resistance etc. in circuit will disturb the received signal, and the preamplification circuit in circuit will not only introduce new noise, but also amplify noise signal, resulting in unstable detection signal and thus affecting detection quality and accuracy. UTILITY MODEL CONTENT

[0003] The utility model discloses a colloidal gold analysis appearance photoelectricity detection processing system, solves the problem mentioned above.

[0004] Technical scheme: a colloidal gold analysis appearance photoelectricity detection processing system, comprising: comprising: detection module, operational amplification module, integrated logarithmic amplification module, filter module and buffer isolation module;

[0005] In further embodiments, the output end of the detection module is connected with the input end of the transport amplification module, the input end of the integrated logarithmic amplification module is connected with the output end of the operational amplification module, the input end of the filter module is connected with the output end of the integrated logarithmic amplification module, the input end of the buffer isolation module is connected with the output end of the filter module, and the output end of the buffer isolation module outputs a signal to a controller.

[0006] In further embodiments, the detection module is composed of a photodiode D1.

[0007] In further embodiments, the operational amplification module is composed of an operational amplifier.

[0008] In further embodiments, the integrated logarithmic amplification module is composed of an integrated logarithmic amplification chip.

[0009] In further embodiments, the filter module is composed of a low-noise high-speed operational amplifier.

[0010] In further embodiments, the buffer isolation module is composed of a voltage follower.

[0011] In further embodiments, the operational amplifier module comprises: an operational amplifier U1, a resistor R1, a capacitor C1, a resistor VR1;

[0012] The non-inverting input of the operational amplifier U1 is connected to the negative electrode of the photodiode D1, one end of the resistor R1 and one end of the capacitor C1, the inverting input of the operational amplifier U1 is grounded, the positive power supply end of the operational amplifier U1 inputs voltage VCC5, the negative power supply end of the operational amplifier U1 inputs voltage VCC-5 and is connected to the control end of the resistor VR1, the high clamping voltage of the operational amplifier U1 is connected to one end of the resistor VR1, the low clamping voltage of the operational amplifier U1 is connected to the other end of the resistor VR1, and the output end of the operational amplifier U1 is connected to the other end of the resistor R1 and the other end of the capacitor C1 and outputs a signal.

[0013] In further embodiments, the integrated logarithmic amplification module comprises: a resistor R2, a resistor VR2, a resistor R3, a resistor R4, a voltage stabilizing tube D1, a capacitor C2, a resistor R5, a resistor R6, an integrated logarithmic amplification chip U2;

[0014] One end of the resistor R2 is connected to the output end of the operational amplifier U1 and inputs a signal, the No. 1 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the resistor R2, the No. 14 pin of the integrated logarithmic amplification chip U2 is connected to one end of the resistor R3 and one end of the capacitor C2, the other end of the resistor R3 is connected to one end of the resistor VR2, the No. 8 pin of the integrated logarithmic amplification chip U2 is connected to the control end and the other end of the resistor VR2, the negative electrode of the voltage stabilizing tube D1 and one end of the resistor R4, the positive electrode of the voltage stabilizing tube D1 is grounded, the other end of the resistor R4 inputs voltage VCC, the No. 5 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the capacitor C2 and one end of the resistor R5, the No. 4 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the resistor R5 and one end of the resistor R6, the No. 9 pin of the integrated logarithmic amplification chip U2 inputs negative voltage VCC5, the No. 6 pin of the integrated logarithmic amplification chip U2 inputs positive voltage VCC5, the No. 11 pin, No. 13 pin, No. 10 pin and No. 3 pin of the integrated logarithmic amplification chip U2 are grounded, and the No. 7 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the resistor R6 and outputs a signal.

[0015] In further embodiments, the filter module comprises: a resistor R7, a capacitor C3, a resistor R8, a capacitor C4, a resistor RV3, a resistor RV4, a resistor RV5, a capacitor C8, a capacitor C9, a capacitor C6, a capacitor C7, a resistor R9, a low-noise high-speed operational amplifier U4;

[0016] One end of the resistor R7 is connected with the No. 7 pin of the integrated logarithmic amplification chip U2 and inputs a signal, the other end of the resistor R7 is connected with one end of the resistor R8 and one end of the capacitor C3, one end of the capacitor C5 is connected with one end of the capacitor C4, the other end of the resistor R8 and one end and a control end of the resistor RV4, the other end of the capacitor C3 is grounded, the other end of the capacitor C4 is grounded, the non-inverting input end of the low-noise high-speed operational amplifier U4 is connected with the other end of the capacitor C5 and one end and a control end of the resistor RV3, the other end of the resistor RV3 is grounded, the inverting input end of the low-noise high-speed operational amplifier U4 is connected with one end of the resistor R9 and one end of the resistor RV5, the other end and a control end of the resistor RV5 are grounded, the positive power supply end of the low-noise high-speed operational amplifier U4 is connected with one end of the capacitor C9, one end of the capacitor C8 and inputs a voltage VCC5, the other end of the capacitor C9 and the other end of the capacitor C8 are grounded, the negative power supply end of the low-noise high-speed operational amplifier U4 is connected with one end of the capacitor C6, one end of the capacitor C7 and inputs a voltage VCC-5, the other end of the capacitor C6 and the other end of the capacitor C7 are grounded, and the output end of the low-noise high-speed operational amplifier U4 is connected with the other end of the resistor RV4 and the other end of the resistor R9 and outputs a signal.

[0017] In further embodiments, the buffer isolation module comprises: a voltage follower U3A; the non-inverting input end of the voltage follower U3A is connected with the output end of the low-noise high-speed operational amplifier U4, and the inverting input end of the voltage follower U3A is connected with the output end and outputs a signal.

[0018] Beneficial effects: the utility model has excellent noise suppression ability, can amplify signal well and guarantee signal stability, filters the generated noise signal, the filtered signal can basically retain the useful components of the original signal and is relatively smooth, so that the utility model can guarantee the stability and accuracy of the photoelectric signal, thereby improving the detection quality and accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of the utility model.

[0020] Figure 2 It is the circuit diagram of the utility model. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0024] A kind of colloidal gold analyzer photoelectric detection processing system, the photoelectric detection processing system includes: detection module, operational amplifier module, integrated logarithmic amplification module, filter module and buffer isolation module;

[0025] In one embodiment, as shown in Figure 1 The output end of the detection module is connected with the input end of the transport amplification module, the input end of the integrated logarithmic amplification module is connected with the output end of the operational amplifier module, the input end of the filter module is connected with the output end of the integrated logarithmic amplification module, the output end of the buffer isolation module is connected with the output end of the filter module, and the output end of the buffer isolation module outputs a signal to the controller.

[0026] In one embodiment, as shown in Figure 2 The detection module is composed of a photodiode D1.

[0027] In one embodiment, as shown in Figure 2 The operational amplification module is composed of an operational amplifier.

[0028] In one embodiment, as shown in Figure 2 The integrated logarithmic amplification module is composed of an integrated logarithmic amplification chip.

[0029] In one embodiment, as shown in Figure 2 The filter module is composed of a low-noise high-speed operational amplifier.

[0030] In one embodiment, as shown in Figure 2 The buffer isolation module is composed of a voltage follower.

[0031] In one embodiment, as shown in Figure 2 The operational amplification module includes: an operational amplifier U1, a resistor R1, a capacitor C1, and a resistor VR1.

[0032] The inverting input terminal of the operational amplifier U1 is connected to the negative electrode of the photodiode D1, one end of the resistor R1, and one end of the capacitor C1, the non-inverting input terminal of the operational amplifier U1 is grounded, the positive power supply terminal of the operational amplifier U1 inputs a voltage VCC5, the negative power supply terminal of the operational amplifier U1 inputs a voltage VCC-5 and is connected to the control terminal of the resistor VR1, the high clamping voltage of the operational amplifier U1 is connected to one end of the resistor VR1, the low clamping voltage of the operational amplifier U1 is connected to the other end of the resistor VR1, and the output terminal of the operational amplifier U1 is connected to the other end of the resistor R1 and the other end of the capacitor C1 and outputs a signal.

[0033] In one embodiment, as shown in Figure 2 The integrated logarithmic amplification module includes: a resistor R2, a resistor VR2, a resistor R3, a resistor R4, a voltage stabilizing tube D1, a capacitor C2, a resistor R5, a resistor R6, and an integrated logarithmic amplification chip U2.

[0034] One end of resistor R2 is connected to the output terminal of operational amplifier U1 and is also the input signal. Pin 1 of integrated logarithmic amplifier chip U2 is connected to the other end of resistor R2. Pin 14 of integrated logarithmic amplifier chip U2 is simultaneously connected to one end of resistor R3 and one end of capacitor C2. The other end of resistor R3 is connected to one end of resistor RV2. Pin 8 of integrated logarithmic amplifier chip U2 is simultaneously connected to the control terminal and the other end of resistor RV2, the negative terminal of Zener diode D1, and one end of resistor R4. The positive terminal of Zener diode D1 is grounded. The other end of resistor R4 is connected to the input voltage V. Pin 5 of the integrated logarithmic amplifier chip U2 is connected to the other end of capacitor C2 and one end of resistor R5. Pin 4 of the integrated logarithmic amplifier chip U2 is connected to the other end of resistor R5 and one end of resistor R6. Pin 9 of the integrated logarithmic amplifier chip U2 receives a negative voltage VCC5. Pin 6 of the integrated logarithmic amplifier chip U2 receives a positive voltage VCC5. Pins 11, 13, 10, and 3 of the integrated logarithmic amplifier chip U2 are grounded. Pin 7 of the integrated logarithmic amplifier chip U2 is connected to the other end of resistor R6 and outputs a signal.

[0035] In one embodiment, such as Figure 2 As shown, the filtering module includes: resistor R7, capacitor C3, resistor R8, capacitor C4, resistor RV3, resistor RV4, resistor RV5, capacitor C8, capacitor C9, capacitor C6, capacitor C7, resistor R9, and low-noise high-speed operational amplifier U4.

[0036] One end of resistor R7 is connected to pin 7 of the integrated logarithmic amplifier chip U2 and receives the input signal. The other end of resistor R7 is simultaneously connected to one end of resistor R8 and one end of capacitor C3. One end of capacitor C5 is simultaneously connected to one end of capacitor C4, the other end of resistor R8, one end of resistor RV4, and the control terminal. The other end of capacitor C3 is grounded, and the other end of capacitor C4 is grounded. The non-inverting input terminal of the low-noise high-speed operational amplifier U4 is simultaneously connected to the other end of capacitor C5, one end of resistor RV3, and the control terminal. The other end of resistor RV3 is grounded. The inverting input terminal of the low-noise high-speed operational amplifier U4 is simultaneously connected to resistor R9. One end of the capacitor is connected to one end of the resistor RV5, and the other end of the resistor RV5 and the control terminal are grounded. The positive power supply terminal of the low-noise high-speed operational amplifier U4 is simultaneously connected to one end of the capacitor C9 and one end of the capacitor C8, with an input voltage of VCC5. The other ends of the capacitor C9 and the other ends of the capacitor C8 are grounded. The negative power supply terminal of the low-noise high-speed operational amplifier U4 is simultaneously connected to one end of the capacitor C6 and one end of the capacitor C7, with an input voltage of VCC-5. The other ends of the capacitor C6 and the other ends of the capacitor C7 are grounded. The output terminal of the low-noise high-speed operational amplifier U4 is simultaneously connected to the other end of the resistor RV4 and the other end of the resistor R9, and outputs a signal.

[0037] In one embodiment, such as Figure 2 As shown, the buffer isolation module includes: a voltage follower U3A; the non-inverting input of the voltage follower U3A is connected to the output of the low-noise high-speed operational amplifier U4, and the inverting input of the voltage follower U3A is connected to the output and outputs a signal.

[0038] Working principle: the utility model discloses when working, photodiode D1 adopts the photodiode of photoelectric voltage mode, under this mode, photodiode is in zero bias state, there is no dark current, and noise is lower, and photodiode D1 gathers signal and exports to operational amplifier module, in weak light signal detection, because the input light power is usually between 0 and dozens of nW, and the photoelectric current of photoelectric detector output is between several and dozens of nA, so the operational amplifier module is used as the front stage operational amplifier, and operational amplifier U1 is amplified, and resistor RV1 is adjusted amplification multiple, and the operational amplifier module exports signal after completing amplification, and the signal output by the circuit is only mV order, and the signal needs to be further amplified by low-noise preamplifier circuit working stably, and is amplified twice through integrated logarithmic amplification module, and integrated logarithmic amplification chip U2 does logarithmic operation to the ratio of two input currents, has voltage amplifier internally, and the amplification multiple can be adjusted through external resistance, and then the signal is exported to filter module, filters noise, extracts the effective signal, and finally keeps the stability and amplifies the signal through buffer isolation module.

[0039] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A colloidal gold analyzer photoelectric detection processing system, characterized in that, The photoelectric detection processing system comprises a detection module, an operational amplification module, an integrated logarithmic amplification module, a filtering module and a buffer isolation module. An output end of the detection module is connected with an input end of the operational amplification module, an input end of the integrated logarithmic amplification module is connected with an output end of the operational amplification module, an input end of the filtering module is connected with an output end of the integrated logarithmic amplification module, an input end of the buffer isolation module is connected with an output end of the filtering module, and an output end of the buffer isolation module outputs a signal to a controller.

2. The photoelectric detection processing system of the colloidal gold analyzer according to claim 1, wherein, The detection module is composed of a photodiode D1.

3. The photoelectric detection processing system of the colloidal gold analyzer according to claim 1, wherein, The operational amplification module is composed of an operational amplifier.

4. The photoelectric detection processing system of the colloidal gold analyzer according to claim 1, wherein, The integrated logarithmic amplification module is composed of an integrated logarithmic amplification chip.

5. The photoelectric detection processing system of the colloidal gold analyzer according to claim 1, wherein, The filtering module is composed of a low-noise high-speed operational amplifier.

6. The photoelectric detection processing system of the colloidal gold analyzer according to claim 1, wherein, The buffer isolation module is composed of a voltage follower.

7. The photoelectric detection processing system of the colloidal gold analyzer according to claim 2, wherein, The operational amplification module comprises an operational amplifier U1, a resistor R1, a capacitor C1 and a resistor VR1. An inverting input end of the operational amplifier U1 is connected with a negative electrode of the photodiode D1, one end of the resistor R1 and one end of the capacitor C1, a non-inverting input end of the operational amplifier U1 is grounded, a positive power supply end of the operational amplifier U1 inputs a voltage VCC5, a negative power supply end of the operational amplifier U1 inputs a voltage VCC-5 and is connected with a control end of the resistor VR1, a high clamping voltage of the operational amplifier U1 is connected with one end of the resistor VR1, a low clamping voltage of the operational amplifier U1 is connected with the other end of the resistor VR1, and an output end of the operational amplifier U1 is connected with the other end of the resistor R1 and the other end of the capacitor C1 and outputs a signal.

8. The photoelectric detection processing system of the colloidal gold analyzer according to claim 7, wherein, The integrated logarithmic amplification module comprises a resistor R2, a resistor VR2, a resistor R3, a resistor R4, a voltage stabilizing tube D1, a capacitor C2, a resistor R5, a resistor R6 and an integrated logarithmic amplification chip U2. One end of the resistor R2 is connected to the output of the operational amplifier U1 and inputs a signal, the No. 1 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the resistor R2, the No. 14 pin of the integrated logarithmic amplification chip U2 is simultaneously connected to one end of the resistor R3 and one end of the capacitor C2, the other end of the resistor R3 is connected to one end of the resistor RV2, the No. 8 pin of the integrated logarithmic amplification chip U2 is simultaneously connected to the control end and the other end of the resistor RV2, the negative electrode of the stabilizing tube D1 and one end of the resistor R4, the positive electrode of the stabilizing tube D1 is grounded, the other end of the resistor R4 inputs a voltage VCC, the No. 5 pin of the integrated logarithmic amplification chip U2 is simultaneously connected to the other end of the capacitor C2 and one end of the resistor R5, the No. 4 pin of the integrated logarithmic amplification chip U2 is simultaneously connected to the other end of the resistor R5 and one end of the resistor R6, the No. 9 pin of the integrated logarithmic amplification chip U2 inputs a negative voltage VCC5, the No. 6 pin of the integrated logarithmic amplification chip U2 inputs a positive voltage VCC5, the No. 11 pin, the No. 13 pin, the No. 10 pin and the No. 3 pin of the integrated logarithmic amplification chip U2 are grounded, and the No. 7 pin of the integrated logarithmic amplification chip U2 is connected to the other end of the resistor R6 and outputs a signal.

9. The photoelectric detection processing system of the colloidal gold analyzer according to claim 8, wherein, The filter module comprises a resistor R7, a capacitor C3, a resistor R8, a capacitor C4, a resistor RV3, a resistor RV4, a resistor RV5, a capacitor C8, a capacitor C9, a capacitor C6, a capacitor C7, a resistor R9 and a low-noise high-speed operational amplifier U4. One end of the resistor R7 is connected with No. 7 pin of the integrated logarithmic amplification chip U2 and inputs signal, the other end of the resistor R7 is connected with one end of the resistor R8 and one end of the capacitor C3, one end of the capacitor C5 is connected with one end of the capacitor C4, the other end of the resistor R8 and one end and control end of the resistor RV4, the other end of the capacitor C3 is grounded, the other end of the capacitor C4 is grounded, the non-inverting input end of the low-noise high-speed operational amplifier U4 is connected with the other end of the capacitor C5 and one end and control end of the resistor RV3, the other end of the resistor RV3 is grounded, the inverting input end of the low-noise high-speed operational amplifier U4 is connected with one end of the resistor R9 and one end of the resistor RV5, the other end and control end of the resistor RV5 is grounded, the positive power supply end of the low-noise high-speed operational amplifier U4 is connected with one end of the capacitor C9 and one end of the capacitor C8 and inputs voltage VCC5, the other end of the capacitor C9 and the other end of the capacitor C8 is grounded, the negative power supply end of the low-noise high-speed operational amplifier U4 is connected with one end of the capacitor C6 and one end of the capacitor C7 and inputs voltage VCC-5, the other end of the capacitor C6 and the other end of the capacitor C7 is grounded, the output end of the low-noise high-speed operational amplifier U4 is connected with the other end of the resistor RV4 and the other end of the resistor R9 and outputs signal.

10. The photoelectric detection processing system of the colloidal gold analyzer according to claim 9, wherein, The buffer isolation module comprises a voltage follower U3A, the non-inverting input end of the voltage follower U3A is connected with the output end of the low-noise high-speed operational amplifier U4, and the inverting input end of the voltage follower U3A is connected with the output end and outputs signal.

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