Turbidity Measuring Method and Measuring System Based on Orthogonal Signal Modulation
A measurement method and orthogonal signal technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low measurement accuracy of water turbidity, and achieve the goal of solving the problem of low measurement accuracy of water turbidity, reducing influence, and improving measurement accuracy Effect
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Embodiment 1
[0035] In the related art, when measuring the turbidity of the water body by an optical method, the incident light intensity I before the incident water body is obtained. o , and the light intensity I of the transmitted beam from the body of water t , the incident light can be emitted by a light-emitting diode, and the transmitted light can be received by a photodetector. Turbidity T is used to represent the optical transparency of water, which can characterize the degree to which incident light is attenuated by water and suspended particles. According to the Beer-Lambert law, the detected transmitted light intensity I t The relationship between turbidity T and turbidity T is as follows:
[0036]
[0037] where k 1 and k 2 are parameters related to environmental factors (optical path, optical arrangement, temperature, size of substances and suspended particles, etc.). Through simple algebraic operations, the turbidity T can be expressed as:
[0038] T=-k 2 (lnI t -l...
Embodiment 2
[0098] According to an embodiment of the present invention, an embodiment of a turbidity measurement system based on quadrature signal modulation is provided, Figure 8 is a schematic diagram of an optional turbidity measurement system based on quadrature signal modulation according to an embodiment of the present invention, such as Figure 8 As shown, the measurement system includes:
[0099] The light emitter 81 is located on one side of the liquid to be measured 80, and is used to emit detection light according to the driving signal; the photodetector 82 is located on the other side of the liquid to be measured 80, and is used to receive the detection light obtained by penetrating the liquid to be measured. outgoing light, and generating a photoelectric signal according to the outgoing light; the controller 83, connected with the light emitter 81 and the photodetector 82, is used to generate a driving signal, and determine the turbidity of the liquid to be measured accordin...
Embodiment 3
[0106] According to an embodiment of the present invention, an embodiment of a device for measuring turbidity based on quadrature signal modulation is provided, Figure 9 is a schematic diagram of an optional turbidity measurement device based on quadrature signal modulation according to an embodiment of the present invention, such as Figure 9 As shown, the measuring device includes:
[0107] The generating module 91 is used to generate the driving signal of the optical transmitter, wherein the driving signal is a quadrature signal, which is used to drive the optical transmitter to emit detection light; the receiving module 92 is used to obtain the photoelectric signal generated by the photodetector, and the photoelectric detection The device is used to receive the outgoing light obtained by the detection light penetrating the liquid to be measured; the signal processing module 93 is used to determine the turbidity of the liquid to be measured according to the driving signal ...
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