CN214703327U - Turbidity sensor - Google Patents
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- CN214703327U CN214703327U CN202121119542.2U CN202121119542U CN214703327U CN 214703327 U CN214703327 U CN 214703327U CN 202121119542 U CN202121119542 U CN 202121119542U CN 214703327 U CN214703327 U CN 214703327U
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Abstract
The embodiment of the application discloses a turbidity sensor, wherein a thermosensitive device in the turbidity sensor can output a first voltage signal according to the working environment temperature of a light-emitting device, a processing device can obtain a second voltage signal based on the first voltage signal for controlling the intensity of an optical signal emitted by the light-emitting device, wherein the higher the working environment temperature of the light-emitting device is, the larger the first voltage signal is, the larger the second voltage signal is, and under the same driving voltage signal, the higher the working environment temperature of the light-emitting device is, the smaller the intensity of the optical signal emitted by the light-emitting device is, so that when the working environment temperature is increased, the second voltage signal is enhanced, the intensity of the optical signal emitted by the light-emitting device caused by the increase of the working environment temperature is reduced, when the working environment temperature is reduced, the second voltage signal is reduced, the intensity of the optical signal emitted by the light-emitting device caused by the reduction of the working environment temperature is reduced, the light signal intensity emitted by the light-emitting device is stable, so that the accuracy of the turbidity sensor is high.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a turbidity sensor.
Background
Along with the improvement of the quality of life, intelligent household electrical appliances begin to gradually integrate into the life of people, wherein the intelligent household electrical appliances such as washing machines, dish washing machines and the like become very important intelligent household electrical appliances in the life of people, and great convenience is brought to the daily life of people.
When the existing intelligent household appliances such as washing machines and dish washing machines work specifically, the optimal washing time and the optimal usage amount of working substances are determined according to turbidity detection results of turbidity sensors in the intelligent household appliances such as washing machines and dish washing machines.
Under the general condition, turbidity sensor realizes turbidity according to the difference between the light signal intensity that this light signal that its transmission was received forms after the working material transmission in operational environment that it was through the light signal intensity that the turbidity detected, however at the concrete during operation of turbidity sensor, the light signal intensity of turbidity sensor transmission can change along with the change of the operational environment temperature that turbidity sensor is located, turbidity sensor operational environment temperature is different, the light signal intensity of turbidity sensor transmission is different, thereby make the turbidity test result that turbidity sensor obtained different, make turbidity sensor carry out the turbidity test result difference that the turbidity detected under the same operational environment of different temperatures, and then influence turbidity sensor's turbidity test result's accuracy. Therefore, how to improve the accuracy of the turbidity detection result of the turbidity sensor becomes a key point of research by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an embodiment of the present application provides a turbidity sensor, and a turbidity detection result of the turbidity sensor is high in accuracy.
In order to solve the above problem, the embodiment of the present application provides the following technical solutions:
a turbidity sensor, comprising:
the light emitting device emits light signals, and the intensity of the light signals emitted by the light emitting device is smaller when the working environment temperature of the light emitting device is higher under the same driving voltage signal;
the heat-sensitive device outputs a first voltage signal according to the temperature of the working environment where the light-emitting device is located;
the input end of the processing device is connected with the output end of the thermosensitive device, the output end of the processing device is connected with the input end of the light-emitting device, a second voltage signal is obtained based on the first voltage signal, the second voltage signal is output to the light-emitting device, and the intensity of the light signal emitted by the light-emitting device is controlled, wherein the higher the working environment temperature of the light-emitting device is, the larger the first voltage signal is, the larger the second voltage signal is, so that the influence of the working environment temperature of the light-emitting device on the intensity of the light signal emitted by the light-emitting device is reduced;
and the detection device is used for detecting the turbidity value of the working environment of the light-emitting device based on the intensity of the light signal formed after the light signal emitted by the light-emitting device is transmitted through the working environment of the light-emitting device.
Optionally, the processing device includes a processor, where the processor obtains a first temperature signal of a working environment where the light emitting device is located according to the first voltage signal, and obtains a second voltage signal according to the first temperature signal of the working environment where the light emitting device is located, where the first temperature signal of the working environment where the light emitting device is located is an analog signal representing a temperature of the working environment where the light emitting device is located.
Optionally, the processing device includes:
the input end of the first analog-to-digital conversion element is connected with the output end of the thermosensitive device, and the first voltage signal is converted into a first digital voltage signal;
a first input end of the processor is connected with an output end of the first analog-to-digital conversion element, the first digital voltage signal is input, a second temperature signal of a working environment where the light-emitting device is located is obtained based on the first digital voltage signal, and a second digital voltage signal is obtained according to the second temperature signal of the working environment where the light-emitting device is located, wherein the second temperature signal of the working environment where the light-emitting device is located is a digital signal representing the temperature of the working environment where the light-emitting device is located;
and the input end of the digital-to-analog conversion element is connected with the first output end of the processor, the output end of the digital-to-analog conversion element is connected with the input end of the light-emitting device, the second digital voltage signal is input, the second digital voltage signal is converted into the second voltage signal, and the second voltage signal is output to the light-emitting device.
Optionally, the processing device further includes a storage element, the processor has a second output end, an input end of the storage element is connected to the second output end of the processor, and stores a second temperature signal of an operating environment where the light-emitting device is located, and the processor also has a second input end, and an output end of the storage element is connected to the second input end of the processor.
Optionally, the detection device includes:
the optical signal intensity detection element is used for detecting the intensity of an optical signal formed after an optical signal emitted by the light-emitting device is transmitted through the working environment where the light-emitting device is located, and obtaining a third voltage signal based on the intensity of the optical signal formed after the optical signal emitted by the light-emitting device is transmitted through the working environment where the light-emitting device is located, wherein the third voltage signal is an analog signal representing the turbidity of the working environment where the light-emitting device is located;
and the interface element outputs the third voltage signal.
Optionally, the processing device includes a second analog-to-digital conversion element, and the detecting device includes:
the processor is provided with a third input end, the third input end of the processor is connected with the output end of the second analog-to-digital conversion element, a fourth digital voltage signal is output based on the third digital voltage signal, and the fourth digital voltage signal is a digital signal representing the turbidity of the working environment where the light-emitting device is located;
and the interface element outputs the fourth digital voltage signal.
Optionally, the light emitting device includes:
a first end of the light emitting element is an input end of the light emitting device, the second voltage signal is input, and a second end of the light emitting element is grounded through a first resistor;
and a first end of the first capacitor is connected with the first end of the light-emitting element, and a second end of the first capacitor is connected with the second end of the light-emitting element.
Optionally, the heat-sensitive device comprises:
the first end of the thermosensitive element is the input end of the thermosensitive device and is used for inputting the power supply voltage of the thermosensitive device, the second end of the thermosensitive element is the output end of the thermosensitive device and is used for outputting the first voltage signal, and the second end of the thermosensitive element is also grounded through a second resistor;
and the first end of the second capacitor is connected with the first end of the thermosensitive element, and the second end of the second capacitor is connected with the second end of the thermosensitive element.
Optionally, the optical signal strength detecting element includes:
a first end of the photosensitive element is an input end of the optical signal intensity detection element and inputs a power supply voltage of the optical signal intensity detection element, a second end of the photosensitive element is an output end of the optical signal intensity detection element and outputs the third voltage signal, and the second end of the photosensitive element is also grounded through a third resistor;
and the first end of the third capacitor is connected with the first end of the photosensitive element, and the second end of the third capacitor is connected with the second end of the photosensitive element.
Compared with the prior art, the technical scheme has the following advantages:
the technical scheme provided by the embodiment of the application comprises the following steps: the light emitting device comprises a light emitting device, a heat sensitive device, a processing device and a detection device, wherein the heat sensitive device can output a first voltage signal according to the temperature of the working environment where the light emitting device is located, the processing device can obtain a second voltage signal based on the first voltage signal, input the obtained second voltage signal into the light emitting device and control the intensity of a light signal emitted by the light emitting device, the first voltage signal is larger when the temperature of the working environment where the light emitting device is located is higher, the second voltage signal is larger, the intensity of the light signal emitted by the light emitting device is smaller when the temperature of the working environment where the light emitting device is located is higher under the same driving voltage signal, namely the variation trend of the signal intensity of the second voltage signal is the same as the variation trend of the temperature of the working environment where the light emitting device is located, and the variation trend of the intensity of the light signal emitted by the light emitting device is the same as the variation trend of the temperature of the working environment where the light emitting device is located The trend of the change is opposite.
Because the variation trend of the intensity of the optical signal emitted by the light emitting device is the same as the variation trend of the signal intensity of the second voltage signal, when the temperature of the working environment where the light emitting device is located in the turbidity sensor provided by the embodiment of the present application is increased, the signal intensity of the second voltage signal is increased, which can weaken the decrease of the intensity of the optical signal emitted by the light emitting device caused by the increase of the temperature of the working environment where the light emitting device is located, and when the temperature of the working environment where the light emitting device is located is decreased, the signal intensity of the second voltage signal is decreased, which can weaken the increase of the intensity of the optical signal emitted by the light emitting device caused by the decrease of the temperature of the working environment where the light emitting device is located, so that the turbidity sensor provided by the embodiment of the present application can reduce the influence of the temperature of the working environment where the light emitting device is located on the intensity of the optical signal emitted by the light emitting device, under the different operational environment temperature, the light signal intensity of illuminator transmission is more stable, and then makes turbidity sensor's turbidity test result's accuracy is higher, is favorable to turbidity sensor's practical application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a turbidity sensor provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another turbidity sensor provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another turbidity sensor provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another turbidity sensor provided in an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another turbidity sensor provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of a light-emitting device in a turbidity sensor according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of a temperature sensitive device in a turbidity sensor according to an embodiment of the present application;
FIG. 8 is a schematic diagram of an optical signal strength detection element in a turbidity sensor according to an embodiment of the present disclosure;
fig. 9 is a cross-sectional view of a turbidity sensor provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
Next, the present application will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present application, the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only examples, which should not limit the scope of the protection of the present application. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
As described in the background section, how to improve the accuracy of the turbidity detection result of the turbidity sensor becomes a research focus of those skilled in the art.
The basic working principle of the turbidity sensor is infrared photoelectric sensing, and the turbidity sensor has the advantages of wide application range, strong directivity, low power consumption, low cost and the like.
The turbidity sensor generally applied to the market at present consists of an infrared transmitting tube, an infrared photosensitive tube and a shell, wherein the infrared transmitting tube is used for transmitting optical signals, and the infrared photosensitive tube is used for receiving the optical signals transmitted by the infrared transmitting tube. During specific work, working substances in the working environment where the turbidity sensor is located are placed between the infrared transmitting tube and the infrared photosensitive tube, light signals transmitted by the infrared transmitting tube penetrate through the working substances and are received by the infrared photosensitive tube, the turbidity sensor can output voltage signals according to the intensity of the light signals received by the infrared photosensitive tube, and turbidity values of the working substances are obtained according to the voltage signals, so that turbidity values of the working environment where the turbidity sensor is located are obtained.
However, the optical signal intensity of infrared emission tube transmission among the current turbidity sensor can receive the influence of infrared emission tube place operational environment temperature, the optical signal intensity of different operational environment temperature launches is different, it is specific, under the unchangeable condition of infrared emission tube's driving voltage, the operational environment temperature that infrared emission tube locates risees, the optical signal intensity of infrared emission tube transmission reduces, on the contrary, the optical signal intensity reinforcing of infrared emission tube transmission, make turbidity sensor carry out the turbidity detection result that turbidity detected and obtained different to the working substance of same operational environment under the different temperatures, influence turbidity sensor's turbidity detection result, make the turbidity detection accuracy that turbidity sensor obtained relatively poor.
In order to solve the above problems, the conventional turbidity sensor usually compensates the voltage signal output by the turbidity sensor according to the intensity of the light signal received by the infrared photosensitive tube, however, this method also has disadvantages in that, because the intensity of the light signal output by the infrared transmitting tube of the turbidity sensor is different in the working environments with different temperatures, so that the intensity of the light signal received by the infrared photosensitive tube of the turbidity sensor is different, therefore, the compensation function when the turbidity sensor compensates the voltage signal output by the turbidity sensor should be different, but it is difficult to compensate the voltage signal output by the turbidity sensor by adjusting the compensation function in real time according to the temperature of the working environment where the infrared transmitting tube is located, so the conventional turbidity sensor usually compensates the voltage signal output by using a certain fixed compensation function, however, when the voltage signal output by the turbidity sensor is compensated by adopting a certain fixed compensation function, the signal intensity of the voltage signal obtained after the voltage signal output by the turbidity sensor is compensated and the signal intensity of the ideal voltage signal have large deviation, so that the turbidity detection result obtained by the turbidity sensor has large deviation, and the turbidity detection result of the turbidity sensor has poor accuracy.
Based on this, the present application embodiment provides a turbidity sensor, as shown in fig. 1, including:
the light emitting device 10 emits a light signal, and the intensity of the light signal emitted by the light emitting device 10 is smaller when the temperature of the working environment 00 in which the light emitting device 10 is located is higher under the same driving voltage;
the heat-sensitive device 20 outputs a first voltage signal V1 according to the temperature of the working environment 00 of the light-emitting device 10;
the input end of the processing device 30 is connected with the output end of the heat-sensitive device 20, the output end of the processing device 30 is connected with the input end of the light-emitting device 10, a second voltage signal V2 is obtained based on the first voltage signal V1, and the second voltage signal V2 is output to the light-emitting device 10, so as to control the intensity of the light signal emitted by the light-emitting device 10 through the second voltage signal V2, wherein the higher the temperature of the working environment 00 where the light-emitting device 10 is located is, the larger the first voltage signal V1 is, the larger the second voltage signal V2 is, so as to reduce the influence of the temperature of the working environment 00 where the light-emitting device 10 is located on the intensity of the light signal emitted by the light-emitting device 10;
the detecting device 50 detects the turbidity value of the working environment 00 of the light-emitting device 10 based on the intensity of the light signal formed after the light signal emitted by the light-emitting device 10 is transmitted through the working environment 00 of the light-emitting device 10, so that the turbidity sensor can detect and obtain the turbidity value of the working environment of the light-emitting device.
Specifically, in the embodiment of the present application, the turbidity sensor includes a light emitting device, a heat sensitive device, a processing device, and a detecting device, the heat sensitive device can output a first voltage signal according to a temperature of an operating environment where the light emitting device is located, the processing device can obtain a second voltage signal based on the first voltage signal, input the obtained second voltage signal into the light emitting device, and control an intensity of an optical signal emitted by the light emitting device, where the higher the temperature of the operating environment where the light emitting device is located, the larger the first voltage signal is, the larger the second voltage signal is, and the higher the temperature of the operating environment where the light emitting device is located is, the smaller the intensity of the optical signal emitted by the light emitting device is, that is, a variation trend of the signal intensity of the second voltage signal is the same as a variation trend of the temperature of the operating environment where the light emitting device is located, the variation trend of the intensity of the optical signal emitted by the light emitting device is opposite to the variation trend of the temperature of the working environment where the light emitting device is located, and the variation trend of the intensity of the optical signal emitted by the light emitting device is the same as the variation trend of the intensity of the signal of the second voltage signal, so that when the temperature of the working environment where the light emitting device is located in the turbidity sensor provided by the embodiment of the present application is increased, the intensity of the signal of the second voltage signal is increased, which can weaken the decrease of the intensity of the optical signal emitted by the light emitting device caused by the increase of the temperature of the working environment where the light emitting device is located, and when the temperature of the working environment where the light emitting device is located is decreased, the intensity of the signal of the second voltage signal is decreased, which can weaken the increase of the intensity of the optical signal emitted by the light emitting device caused by the decrease of the temperature of the working environment where the light emitting device is located, thereby make the turbidity sensor that this application embodiment provided can reduce the lighting device place operational environment temperature is right the influence of the light signal's of lighting device transmission intensity for turbidity sensor is under different operational environment temperatures, the light signal intensity of lighting device transmission is more stable, and then makes turbidity sensor's turbidity test result's accuracy is higher, is favorable to turbidity sensor's practical application.
On the basis of the above-mentioned embodiments, in the embodiments of the present application, when the turbidity sensor is specifically operated, when the temperature of the working environment of the light-emitting device in the turbidity sensor is higher, the thermosensitive device outputs a first voltage signal according to the temperature of the working environment of the light-emitting device, and inputting the first voltage signal into the processing device, wherein the processing device obtains a second voltage signal based on the first voltage signal, and the signal intensity of the second voltage signal is larger at the moment, namely, the driving voltage of the light-emitting device is larger at this time, the reduction of the intensity of the light signal emitted by the light-emitting device due to the temperature rise of the working environment of the light-emitting device can be weakened, thereby reducing the influence of the temperature of the working environment of the light-emitting device on the intensity of the light signal emitted by the light-emitting device; similarly, when the working environment temperature of the light emitting device is low, the signal intensity of the second voltage signal is low, that is, the driving voltage of the light emitting device is low, so that the intensity of the light signal emitted by the light emitting device can be weakened, and the intensity of the emitted light signal is enhanced due to the reduction of the working environment temperature of the light emitting device, so that the influence of the working environment temperature of the light emitting device on the intensity of the light signal emitted by the light emitting device can be reduced, the intensity stability of the light signal emitted by the light emitting device in the turbidity sensor is good, and the accuracy of the turbidity detection result of the turbidity sensor is high.
On the basis of the above embodiment, in this application embodiment, the turbidity sensor includes a detection device, the detection device can receive the light signal emitted by the light emitting device, and obtains the turbidity value of the working environment where the light emitting device is located according to the intensity of the received light signal, so that the turbidity sensor can detect and obtain the turbidity value of the working environment where the light emitting device is located.
Specifically, in the specific work of the turbidity sensor, the optical signal emitted by the light emitting device in the turbidity sensor penetrates through the working environment where the light emitting device is located and is received by the detection device, the detection device can obtain the turbidity value of the working environment where the light emitting device is located according to the intensity of the received optical signal, wherein when the detection device receives the optical signal emitted by the light emitting device, the intensity of the optical signal received by the detection device can be influenced by the turbidity degree of the working environment where the light emitting device is located, when the turbidity degree of the working environment where the light emitting device is located is relatively serious, the intensity of the optical signal received by the detection device is relatively weak, and when the turbidity degree of the working environment where the light emitting device is located is relatively light, the intensity of the optical signal received by the detection device is relatively strong, so that the detection device can obtain the turbidity of the working environment where the light emitting device is located according to the intensity of the optical signal emitted by the light emitting device The value of the intelligent household appliance with the turbidity sensor enables the intelligent household appliance with the turbidity sensor to determine the optimal washing time and the usage amount of working substances according to the turbidity degree of the working environment where the light-emitting device is located in the turbidity sensor, so that the energy conservation and the automation of the intelligent household appliance with the turbidity sensor are realized.
On the basis of the foregoing embodiment, in an embodiment of the present application, as shown in fig. 2, the processing device 30 includes a processor 34, where the processor 34 is configured to obtain a first temperature signal of an operating environment 00 where the light emitting device 10 is located according to the first voltage signal, obtain a second voltage signal according to the first temperature signal of the operating environment 00 where the light emitting device 10 is located, output the second voltage signal to the light emitting device 10, and drive the light emitting device 10 to emit a light signal, where the first temperature signal of the operating environment 00 where the light emitting device 10 is located is an analog signal representing a temperature of the operating environment 00 where the light emitting device 10 is located.
Specifically, in an embodiment of the present application, the obtaining, by the processor, a first temperature signal of an operating environment in which the light emitting device is located according to the first voltage signal, and obtaining, by the processor, a second voltage signal according to the first temperature signal of the operating environment in which the light emitting device is located includes: the processor obtains a first temperature signal of the working environment of the light-emitting device according to a function algorithm between the first voltage signal and the temperature of the working environment of the light-emitting device, and obtains a second voltage signal according to a function algorithm between the first temperature signal of the working environment of the light-emitting device and the driving voltage of the light-emitting device, wherein the second voltage signal is the driving voltage of the light-emitting device, so that the turbidity sensor can control the driving voltage of the light-emitting device according to the temperature of the working environment of the light-emitting device, and further control the intensity of the light signal emitted by the light-emitting device, and the influence of the temperature of the working environment of the light-emitting device on the intensity of the light signal emitted by the light-emitting device is reduced.
It should be noted that, on the basis of the above-mentioned embodiments, in the embodiment of the present application, as shown in fig. 2, the processing device includes a storage element 32, and the storage element 32 stores a function algorithm between the first voltage signal and the temperature of the working environment 00 of the light-emitting device 10 and a function algorithm between the temperature of the working environment 00 of the light-emitting device 10 and the driving voltage of the light-emitting device 10, wherein when the processor 34 obtains the first temperature signal of the working environment 00 of the light-emitting device 10 according to the first voltage signal, and obtains the second voltage signal according to the first temperature signal of the working environment 00 of the light-emitting device 10, the processor 34 calls the function algorithm between the first voltage signal stored in the storage element 32 and the temperature of the working environment 00 of the light-emitting device 10 and the working ring of the light-emitting device 10 stored in the storage element 32 A function algorithm between the temperature of the environment 00 and the driving voltage of the light emitting device 10, obtaining a first temperature signal of the working environment 00 of the light emitting device 10 based on the first voltage signal and the function algorithm between the first voltage signal and the temperature of the working environment 00 of the light emitting device 10, and obtaining the driving voltage of the light emitting device 10 based on the function algorithm between the temperature of the working environment 00 of the light emitting device 10 and the driving voltage of the light emitting device 10 and the first temperature signal, namely obtaining the second voltage signal, wherein the driving voltage of the light emitting device 10 is the second voltage signal.
Optionally, in an embodiment of the present application, the processing device in the turbidity sensor may include a storage element, and the function algorithm between the first voltage signal and the operating environment temperature of the light emitting device and the function algorithm between the driving voltage of the light emitting device and the operating environment temperature of the light emitting device may be stored in different storage areas of the storage element, but the present application is not limited thereto.
In another embodiment of the present application, as shown in fig. 3, the processing device 30 includes a first analog-to-digital converting element 31, an input terminal of the first analog-to-digital converting element 31 is connected to an output terminal of the temperature sensing device 20 to convert the first voltage signal into a first digital voltage signal; a processor 34, a first input end of the processor 34 is connected to the output end of the first analog-to-digital conversion element 31, so as to input the first digital voltage signal into the processor 34, so that the processor 34 can obtain a second temperature signal of the working environment 00 where the light-emitting device 10 is located according to the first digital voltage signal, and obtain a second digital voltage signal according to the second temperature signal of the working environment 00 where the light-emitting device 10 is located; an input end of the digital-to-analog conversion element 33 is connected to the first output end of the processor 34, an output end of the digital-to-analog conversion element 33 is connected to an input end of the light emitting device 10, the second digital voltage signal is input, the second digital voltage signal is converted into the second voltage signal, the second voltage signal is output to the light emitting device 10, and the light emitting device 10 is driven to emit a light signal.
Specifically, in an embodiment of the present application, the obtaining, by the processor, a second temperature signal of an operating environment in which the light emitting device is located according to the first digital voltage signal, and obtaining a second digital voltage signal according to the second temperature signal of the operating environment in which the light emitting device is located by the processor includes: the processor obtains a second temperature signal of the working environment of the light-emitting device according to a function algorithm between the first digital voltage signal and the temperature of the working environment of the light-emitting device, and obtains the second digital voltage signal according to a function algorithm between the second temperature signal of the working environment of the light-emitting device and the driving voltage of the light-emitting device. After the processor obtains the second digital voltage signal, the turbidity sensor converts the second digital voltage signal into the second voltage signal through the digital-to-analog conversion element in the processing device, and the second voltage signal is the driving voltage of the light-emitting device, so that the turbidity sensor can control the driving voltage of the light-emitting device according to the temperature of the working environment where the light-emitting device is located, and further control the intensity of the light signal emitted by the light-emitting device, so as to reduce the influence of the temperature of the working environment where the light-emitting device is located on the intensity of the light signal emitted by the light-emitting device.
On the basis of the above-mentioned embodiments, in an embodiment of the present application, as shown in fig. 3, the processing device 30 further includes a storage element 32, the processor 34 has a second output, an input of the storage element 32 is connected to the second output of the processor 34, the second temperature signal of the working environment 00 of the lighting device 10 is input, and the second temperature signal of the working environment 00 of the lighting device 10 input into the storage element 32 is stored, so that data loss of the second temperature signal of the working environment 00 of the lighting device 10 due to power failure or interference of other factors can be avoided, and a customer can determine an operating condition of the turbidity sensor according to the second temperature signal of the working environment 00 of the lighting device 10 stored in the storage element 32, therefore, when the sensor fails, the sensor can be found and solved in time, and the normal work of the turbidity sensor can be ensured.
In the embodiment of the present application, as shown in fig. 3, the processing device includes a storage element 32, the storage element 32 stores a function algorithm between the first digital voltage signal and the temperature of the operating environment 00 of the light emitting device 10, and a function algorithm between the temperature of the operating environment 00 of the light emitting device 10 and the driving voltage of the light emitting device 10, wherein when the processor 34 obtains the second temperature signal of the operating environment 00 of the light emitting device 10 according to the first digital voltage signal, and obtains the second digital voltage signal according to the second temperature signal of the operating environment 00 of the light emitting device 10, the processor 34 calls the function algorithm between the first digital voltage signal stored in the storage element 32 and the temperature of the operating environment 00 of the light emitting device 10, and the temperature of the operating environment 00 of the light emitting device 10 stored in the storage element 32 10 driving voltage, and obtaining a second temperature signal of the working environment 00 of the light emitting device 10 based on the first digital voltage signal and the function algorithm between the first digital voltage signal and the temperature of the working environment 00 of the light emitting device 10, and obtaining the second digital voltage signal based on the second temperature signal and the function algorithm between the temperature of the working environment 00 of the light emitting device 10 and the driving voltage of the light emitting device 10, the second digital voltage signal is in the form of a digital signal of the driving voltage of the light emitting device 10, and after the second digital voltage signal is obtained, the digital-to-analog conversion element 33 is further required to convert the second digital voltage signal into a second voltage signal, so as to obtain the second voltage signal, where the second voltage signal is the driving voltage of the light emitting device 10.
In addition, in this embodiment, as shown in fig. 3, the processor 34 further has a second input end, and the second input end of the processor 34 is connected to the output end of the storage element 32, so that the processor 34 can also call the second temperature signal of the working environment 00 of the light emitting device 10 stored in the storage element 32 according to an actual requirement, so as to obtain the driving voltage of the light emitting device 10 through the second temperature signal of the working environment 00 of the light emitting device 10 stored in the storage element 32, that is, obtain the second voltage signal.
Optionally, in an embodiment of the present application, the first analog-to-digital conversion element is a 12-bit high-precision analog-to-digital conversion element, and the digital-to-analog conversion element is a 12-bit high-precision digital-to-analog conversion element, but this application does not limit this, which is determined as the case may be.
It should be noted that, on the basis of the above embodiments, in an embodiment of the present application, the processing device in the turbidity sensor may include a storage element, and the second temperature signal of the working environment of the light-emitting device, the algorithm function between the first digital voltage signal and the working environment temperature of the light-emitting device, and the algorithm function between the driving voltage of the light-emitting device and the working environment temperature of the light-emitting device are stored in different storage areas of the storage element, but the present application is not limited thereto, and in other embodiments of the present application, the turbidity sensor may further include a plurality of storage elements, and the algorithm function between the second temperature signal of the working environment of the light-emitting device, the first digital voltage signal and the working environment temperature of the light-emitting device, and the algorithm function between the driving voltage of the light-emitting device and the working environment temperature of the light-emitting device Stored in different storage elements, as the case may be.
In the embodiment of the present application, a functional algorithm between the driving voltage of the light emitting device and the temperature of the operating environment where the light emitting device is located is as follows:
Vin＝A+B*EXP(T/C)
wherein, VinThe processor is configured to obtain the driving voltage of the light emitting device according to the temperature of the working environment of the light emitting device based on the above formula, where T is the second voltage signal, T is the temperature of the working environment of the light emitting device, and A, B, C is a correction parameter, so that the turbidity sensor can control the intensity of the light signal emitted by the light emitting device according to the temperature of the working environment of the light emitting device.
The turbidity sensor that this application embodiment provided, in the real work, the turbidity sensor output the light emitting device place operational environment's turbidity value can be analog value or digital value to make the customer can obtain according to the actual demand in the use the analog value or the digital value of light emitting device place operational environment's turbidity, perhaps the turbidity sensor output the light emitting device place operational environment's turbidity value also can be analog value and digital value, so that the customer can obtain simultaneously in the use the analog value and the digital value of light emitting device place operational environment's turbidity. On the basis of the above-described embodiment, therefore, in one embodiment of the present application, as shown in fig. 4, the detection device 50 comprises an optical signal intensity detection element 51, the optical signal intensity detection element 51 is used for receiving the optical signal emitted by the light-emitting device 10, and detecting the intensity of the optical signal formed by the optical signal emitted by the light-emitting device 10 after being transmitted through the working environment 00 where the light-emitting device 10 is located according to the received optical signal, and obtaining a third voltage signal V3 based on the intensity of the optical signal formed by the optical signal emitted by the light-emitting device 10 after being transmitted through the working environment 00 where the light-emitting device 10 is located, wherein the third voltage signal V3 is an analog signal, i.e. the third voltage signal V3 is an analog signal representing the turbidity of the operating environment 00 in which the light emitting device 10 is operated, so that the turbidity sensor can obtain the result of the analog signal of the turbidity of the working environment 00 in which the light-emitting device 10 is located; an interface element 52, an input end of the interface element 52 is connected to an output end of the optical signal strength detection element 51, the third voltage signal V3 obtained by the optical signal strength detection element 51 is input into the interface element 52, so as to output the third voltage signal V3 through the interface element 52, that is, the analog signal result of the operating environment 00 turbidity where the light-emitting device 10 is located is output through the interface element 52, so that when the turbidity sensor specifically operates, a customer can know the operating environment 00 turbidity where the light-emitting device 10 is located.
In another embodiment of the present application, as shown in fig. 5, the processing device 30 includes a second analog-to-digital converting element 35, the detecting device includes an optical signal intensity detecting element 51, the optical signal intensity detecting element 51 is configured to receive an optical signal formed by transmitting an optical signal emitted by the light emitting device 10 through the operating environment 00 where the light emitting device 10 is located, detect an intensity of the optical signal formed by transmitting the optical signal emitted by the light emitting device 10 through the operating environment 00 where the light emitting device 10 is located according to the received optical signal, obtain a third voltage signal V3 based on the intensity of the optical signal formed by transmitting the optical signal emitted by the light emitting device 10 through the operating environment 00 where the light emitting device 10 is located, the third voltage signal V3 is an analog signal, an output end of the optical signal intensity detecting element 51 is connected to an input end of the second analog-to-digital converting element 35, to convert the third voltage signal V3 into a third digital voltage signal, the processor 34 has a third input terminal, the third input terminal of the processor 34 is connected to the output terminal of the second analog-to-digital conversion element 35, the third digital voltage signal V3 is input, and a fourth digital voltage signal V4 is output based on the third digital voltage signal V3, that is, the third digital voltage signal V3 is converted into the fourth digital voltage signal V4, and the fourth digital voltage signal V4 is a digital signal representing the turbidity of the operating environment in which the light-emitting device 10 is located, so that the turbidity sensor can obtain a digital signal result representing the turbidity of the operating environment in which the light-emitting device 10 is located in 00 turbidity; an interface element 52, wherein the processor 34 further has a third output terminal, the third output terminal of the processor 34 is connected to the input terminal of the interface element 52, and the fourth digital voltage signal V4 is input into the interface element 52, so as to output the fourth digital voltage signal V4 through the interface element 52, that is, the result of outputting the digital signal of the operating environment 00 turbidity of the light-emitting device 10 through the interface element 52, so that when the turbidity sensor is specifically operated, a customer can know the operating environment 00 turbidity of the light-emitting device 10. It should be noted that, in the embodiment of the present application, the processor converts the third digital voltage signal into the fourth digital voltage signal, so as to convert the digital signal result of the turbidity of the operating environment where the light-emitting device 10 is located into the digital signal result according to the customer reading protocol, so that when the turbidity sensor specifically operates, a customer can know the turbidity of the operating environment 00 where the light-emitting device 10 is located.
In another embodiment of the present application, the detecting device in the turbidity sensor can output both the analog signal result of the turbidity of the operating environment in which the light-emitting device is located and the digital signal result of the turbidity of the operating environment in which the light-emitting device is located, that is, the turbidity sensor can simultaneously output the analog signal result and the digital signal result of the turbidity of the operating environment in which the light-emitting device is located, but the present application is not limited thereto, and the detecting device is determined as the case may be.
Optionally, in an embodiment of the present application, the second analog-to-digital conversion element is a 12-bit high-precision analog-to-digital conversion element, but the present application does not limit this, as the case may be.
In order to clearly understand the turbidity sensor provided in the embodiments of the present application, the following detailed descriptions will be provided for specific structures of the light-emitting device, the heat-sensitive device, and the optical signal intensity detecting element in the turbidity sensor.
Specifically, on the basis of any one of the above embodiments, in an embodiment of the present application, as shown in fig. 6, the light emitting device includes: the light emitting device comprises a light emitting element 11, a first resistor 12 and a first capacitor 13, wherein a first end of the light emitting element 11 is an input end of the light emitting device and is used for inputting a driving voltage of the light emitting device, that is, inputting the second voltage signal V2, a second end of the light emitting element 11 is grounded through the first resistor 12, a first end of the first capacitor 13 is connected with the first end of the light emitting element 11, and a second end of the first capacitor 13 is connected with a second end of the light emitting element 11. The first resistor 12 is connected to the second end of the light emitting element 11, and is configured to share a voltage across the light emitting element 11, so as to help avoid damage to the light emitting element 11 due to an excessive voltage across the light emitting element 11, and the first end and the second end of the first capacitor 13 are respectively connected to the first end and the second end of the light emitting element 11, so as to play a role of filtering, so as to help stabilize the voltage across the light emitting element 11, thereby helping to ensure that the intensity of an optical signal output by the light emitting device is relatively stable, and thus the accuracy of a turbidity detection result of the turbidity sensor is relatively high.
Optionally, in an embodiment of the present application, the light emitting element is an infrared emission tube, but the present application does not limit this, as the case may be. In one embodiment of the present application, the light emitting device includes one first resistor, but the present application is not limited thereto, and in other embodiments of the present application, the light emitting device may include at least two first resistors, as the case may be.
As shown in fig. 7, in one embodiment of the present application, the heat-sensitive device includes: the first end of the thermosensitive element 21 is an input end of the thermosensitive device, the power supply voltage VCC1 of the thermosensitive device is input, the second end is an output end of the thermosensitive device, the first voltage signal V1 is output, the second end of the thermosensitive element 21 is also grounded through the second resistor 22, the first end of the second capacitor 23 is connected with the first end of the thermosensitive element 21, and the second end is connected with the second end of the thermosensitive element 21. Wherein a first end of the second resistor 22 is connected to a second end of the thermistor 21, the second end of the second resistor 22 is grounded, so that the first voltage signal output by the thermosensitive device is the voltage difference between the two ends of the second resistor 22 to obtain the first voltage signal, and the first end of the second resistor 22 is connected to the second end of the thermal element 21, and the second end is grounded, so that the voltage on the thermal element 21 can be shared, which helps to avoid the thermal element 21 from being damaged due to the excessive voltage at the two ends, the first terminal and the second terminal of the second capacitor 23 are connected to the first terminal and the second terminal of the thermal element 21, respectively, and can perform a filtering function, which helps to stabilize the voltage across the thermal element 21, thereby helping to ensure that the first voltage signal V1 output by the heat-sensitive device is relatively stable. The second voltage signal is obtained according to the working environment temperature of the light-emitting device, and the working environment temperature of the light-emitting device is obtained according to the first voltage signal, so that the first voltage signal output by the thermosensitive device is stable, the second voltage signal can be stabilized, the intensity of the optical signal emitted by the light-emitting device is stabilized, and the turbidity detection result of the turbidity sensor is high in accuracy.
Optionally, in an embodiment of the present application, the thermosensitive element is a thermistor, but the present application does not limit this, as the case may be. In addition, in one embodiment of the present application, the thermosensitive device includes one second resistor, but the present application is not limited thereto, and in other embodiments of the present application, the thermosensitive device may include at least two second resistors, as the case may be.
As shown in fig. 8, in an embodiment of the present application, the optical signal intensity detecting element in the detecting device includes: the first end of the photosensitive element 56 is the input end of the optical signal strength detecting element, the power supply voltage VCC2 of the optical signal strength detecting element is input, the second end is the output end of the optical signal strength detecting element, the third voltage signal V3 is output, the second end of the photosensitive element 56 is also grounded through the third resistor 54, the first end of the third capacitor 55 is connected with the first end of the photosensitive element 56, and the second end is connected with the second end of the photosensitive element 56. Wherein, the first end of the third resistor 54 is connected to the second end of the photosensitive element 56, the second end of the third resistor 54 is grounded, so that the third voltage signal output by the optical signal strength detecting element is a voltage difference between two ends of the third resistor 54 to obtain the third voltage signal, and the first end of the third resistor 54 is connected to the second end of the photosensitive element 56, and the second end is grounded, and is also capable of sharing the voltage on the photosensitive element 56, so as to help avoid the photosensitive element 56 from being damaged due to the excessive voltages on the two ends, the first end and the second end of the third capacitor 55 are respectively connected to the first end and the second end of the photosensitive element 56, and are capable of playing a role of filtering, helping to stabilize the voltage on the photosensitive element 56, and thus helping to ensure that the third voltage signal V3 output by the optical signal strength detecting element is relatively stable, since the turbidity detection detecting element detects the turbidity of the working environment of the light-emitting device according to the third voltage signal V3 output by the optical signal intensity detecting element, and obtains the turbidity value of the working environment of the light-emitting device, the third voltage signal V3 output by the optical signal intensity detecting element is stable, which can help to make the turbidity detection result of the turbidity sensor more accurate.
Optionally, in an embodiment of the present application, the photosensitive element is a phototransistor, but the photosensitive element is not limited to this, as the case may be. In one embodiment of the present application, the optical signal strength detection element includes a third resistor, but the present application is not limited thereto, and in other embodiments of the present application, the optical signal strength detection element may include at least two third resistors, as the case may be.
It should be noted that, in order to clearly understand how the turbidity sensor obtains the temperature of the working environment of the light-emitting device according to the first voltage signal and then obtains the second voltage signal according to the temperature of the working environment of the light-emitting device, the following describes in detail the process of obtaining the first voltage signal according to the thermosensitive device in the above embodiment, obtaining the temperature of the working environment of the light-emitting device according to the first voltage signal, and then obtaining the second voltage signal according to the temperature of the working environment of the light-emitting device.
Specifically, as shown in fig. 7, the first voltage signal V1 output by the thermal sensing device is a voltage difference between two ends of the second resistor 22 in the thermal sensing device, and the power supply voltage VCC1 of the thermal sensing device and the resistance value of the second resistor 22 are determined values, the processing device in the turbidity sensor can obtain the resistance value of the thermistor in the thermal sensing device at a certain working environment temperature according to the power supply voltage VCC1 of the thermal sensing device, the resistance value of the second resistor 22 and the first voltage signal V1 input into the processing device, obtain the temperature of the working environment where the light emitting device is located according to the resistance value of the thermistor, and finally obtain the driving voltage of the light emitting device according to a function algorithm between the temperature of the working environment where the light emitting device is located and the driving voltage of the light emitting device, i.e. to obtain the second voltage signal (the function algorithm of the working environment temperature and the driving voltage of the light-emitting device is as described above).
It should be noted that, the calculation formula for obtaining the resistance value of the thermistor and obtaining the operating environment temperature of the light emitting device according to the first voltage signal is as follows:
Rntc＝((VCC1-(V1_temp*K))*R2)/(V1_temp*K)
T＝(1.0/(log(Rntc/R)/B+1/T1))-273.15
wherein R isntcIs the resistance value (unit: ohm) of the thermistor at the current temperature, and VCC1 is the power supply voltage (unit: volt) of the thermosensitive device1_tempIs a first voltage signal converted into a digital signal, K is the precision (unit: volt) when the first voltage signal is converted into the digital signal, R is2Is the resistance value (unit: ohm) of the second resistor, R is the resistance value (unit: ohm) of the thermistor when the working environment temperature of the light-emitting device is 25 ℃, B is the material constant (unit: Kelvin) of the thermistor, and T is the resistance value (unit: ohm) of the thermistor1When the working environment temperature of the light-emitting device is 25 ℃, the Kelvin temperature value, T, of the working environment of the light-emitting device1273.15+25 298.15, the processing device obtains the resistance value R of the thermistor at the current temperature by using the above calculation formulantcThen according to the resistance R of the thermistorntcAnd obtaining the temperature T of the working environment where the light-emitting device is located.
In an embodiment of the present application, based on any of the above-described embodiments, as shown in fig. 9, the turbidity sensor further comprises a circuit board 60, the light emitting device, the photosensitive device, the processing device and the detecting device are all integrated on the circuit board 60, wherein the optical center of the light emitting element 11 in the light emitting device on the circuit board 60 and the optical center of the light sensitive element 56 in the optical signal intensity detecting element on the circuit board 60 are located on the same horizontal line and fixed by a bracket 70, the light signal intensity detection element can receive the light signals output by the light-emitting device as much as possible, and the influence on the sensitivity of the turbidity sensor and the accuracy of a turbidity detection result of the turbidity sensor due to the fact that the light signals received by the light signal intensity detection element are less is avoided.
In addition, in the embodiment of the present application, the heat-sensitive element 21 in the heat-sensitive device is close to the light-emitting element 11 in the light-emitting device, on the premise of ensuring that the heat-sensitive element 21 is not in contact with the light-emitting element, the closer the heat-sensitive element 21 is to the light-emitting element, the better, so that the thermosensitive device can accurately output the first voltage signal according to the temperature of the working environment of the light-emitting device, because when the temperature distribution of the working environment of the light-emitting device is not uniform, the temperature of the environment closer to the light-emitting device has a greater influence on the intensity of the light signal output by the light-emitting device, therefore, the heat-sensitive element in the heat-sensitive device is close to the light-emitting element in the light-emitting device, so that the accuracy of the first voltage signal output by the heat-sensitive device is higher, and the accuracy of the turbidity detection result of the turbidity sensor is higher.
On the basis of any of the above embodiments, in an embodiment of the present application, as shown in fig. 9, the turbidity sensor further includes: the casing 80, the circuit board 60 and integrated on the circuit board the illuminator, photosensitive device, processing apparatus, detection device all are located in the casing, can avoid the turbidity sensor is when concrete during operation, disturbed by external environment.
In summary, the embodiments of the present application provide a turbidity sensor, which includes: the light-emitting device comprises a light-emitting device, a heat-sensitive device, a processing device and a detection device, wherein the heat-sensitive device can output a first voltage signal according to the temperature of the working environment of the light-emitting device, the processing device can obtain a second voltage signal based on the first voltage signal, input the obtained second voltage signal into the light-emitting device and control the intensity of an optical signal emitted by the light-emitting device, the first voltage signal is larger when the temperature of the working environment of the light-emitting device is higher, the second voltage signal is larger, and the intensity of the optical signal emitted by the light-emitting device is smaller when the temperature of the working environment of the light-emitting device is higher under the same driving voltage signal, so that the signal intensity of the second voltage signal is increased when the temperature of the working environment of the light-emitting device is higher, the light-emitting device can weaken the reduction of the intensity of the light signal emitted by the light-emitting device caused by the increase of the temperature of the working environment where the light-emitting device is located, when the temperature of the working environment where the light-emitting device is located is reduced, the signal intensity of the second voltage signal is reduced, and the enhancement of the intensity of the light signal emitted by the light-emitting device caused by the reduction of the temperature of the working environment where the light-emitting device is located can be weakened, so that the turbidity sensor provided by the embodiment of the application can reduce the influence of the temperature of the working environment where the light-emitting device is located on the intensity of the light signal emitted by the light-emitting device, the intensity of the light signal emitted by the light-emitting device is stable, the accuracy of the turbidity detection result of the turbidity sensor is high, and the practical application of the turbidity sensor is facilitated.
All parts in the specification are described in a mode of combining parallel and progressive, each part is mainly described to be different from other parts, and the same and similar parts among all parts can be referred to each other.
In the above description of the disclosed embodiments, features described in various embodiments in this specification can be substituted for or combined with each other to enable those skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A turbidity sensor, comprising:
the light emitting device emits light signals, and the intensity of the light signals emitted by the light emitting device is smaller when the working environment temperature of the light emitting device is higher under the same driving voltage signal;
the heat-sensitive device outputs a first voltage signal according to the temperature of the working environment where the light-emitting device is located;
the input end of the processing device is connected with the output end of the thermosensitive device, the output end of the processing device is connected with the input end of the light-emitting device, a second voltage signal is obtained based on the first voltage signal, the second voltage signal is output to the light-emitting device, and the intensity of the light signal emitted by the light-emitting device is controlled, wherein the higher the working environment temperature of the light-emitting device is, the larger the first voltage signal is, the larger the second voltage signal is, so that the influence of the working environment temperature of the light-emitting device on the intensity of the light signal emitted by the light-emitting device is reduced;
and the detection device is used for detecting the turbidity value of the working environment of the light-emitting device based on the intensity of the light signal formed after the light signal emitted by the light-emitting device is transmitted through the working environment of the light-emitting device.
2. The turbidity sensor according to claim 1, wherein the processing means comprises a processor, the processor obtains a first temperature signal of an environment in which the light-emitting device operates according to the first voltage signal, and obtains the second voltage signal according to the first temperature signal of the environment in which the light-emitting device operates, wherein the first temperature signal of the environment in which the light-emitting device operates is an analog signal representing a temperature of the environment in which the light-emitting device operates.
3. A turbidity sensor according to claim 1, wherein said processing means comprises:
the input end of the first analog-to-digital conversion element is connected with the output end of the thermosensitive device, and the first voltage signal is converted into a first digital voltage signal;
a first input end of the processor is connected with an output end of the first analog-to-digital conversion element, the first digital voltage signal is input, a second temperature signal of a working environment where the light-emitting device is located is obtained based on the first digital voltage signal, and a second digital voltage signal is obtained according to the second temperature signal of the working environment where the light-emitting device is located, wherein the second temperature signal of the working environment where the light-emitting device is located is a digital signal representing the temperature of the working environment where the light-emitting device is located;
and the input end of the digital-to-analog conversion element is connected with the first output end of the processor, the output end of the digital-to-analog conversion element is connected with the input end of the light-emitting device, the second digital voltage signal is input, the second digital voltage signal is converted into the second voltage signal, and the second voltage signal is output to the light-emitting device.
4. A turbidity sensor according to claim 3, wherein said processing means further comprises a memory element, said processor having a second output, said memory element having an input coupled to said processor second output for storing a second temperature signal of an environment in which said light emitting means is operated, said processor further having a second input, said memory element output coupled to said processor second input.
5. A turbidity sensor according to claim 1, wherein said detecting means comprises:
the optical signal intensity detection element is used for detecting the intensity of an optical signal formed after an optical signal emitted by the light-emitting device is transmitted through the working environment where the light-emitting device is located, and obtaining a third voltage signal based on the intensity of the optical signal formed after the optical signal emitted by the light-emitting device is transmitted through the working environment where the light-emitting device is located, wherein the third voltage signal is an analog signal representing the turbidity of the working environment where the light-emitting device is located;
and the interface element outputs the third voltage signal.
6. A turbidity sensor according to claim 2, wherein said processing means comprises a second analog-to-digital conversion element, and said detecting means comprises:
the processor is provided with a third input end, the third input end of the processor is connected with the output end of the second analog-to-digital conversion element, a fourth digital voltage signal is output based on the third digital voltage signal, and the fourth digital voltage signal is a digital signal representing the turbidity of the working environment where the light-emitting device is located;
and the interface element outputs the fourth digital voltage signal.
7. A turbidity sensor according to claim 5 or 6, wherein the light emitting means comprises:
a first end of the light emitting element is an input end of the light emitting device, the second voltage signal is input, and a second end of the light emitting element is grounded through a first resistor;
and a first end of the first capacitor is connected with the first end of the light-emitting element, and a second end of the first capacitor is connected with the second end of the light-emitting element.
8. A turbidity sensor according to claim 7, wherein the heat sensitive means comprises:
the first end of the thermosensitive element is the input end of the thermosensitive device and is used for inputting the power supply voltage of the thermosensitive device, the second end of the thermosensitive element is the output end of the thermosensitive device and is used for outputting the first voltage signal, and the second end of the thermosensitive element is also grounded through a second resistor;
and the first end of the second capacitor is connected with the first end of the thermosensitive element, and the second end of the second capacitor is connected with the second end of the thermosensitive element.
9. A turbidity sensor according to claim 8, wherein said optical signal intensity detecting element comprises:
a first end of the photosensitive element is an input end of the optical signal intensity detection element and inputs a power supply voltage of the optical signal intensity detection element, a second end of the photosensitive element is an output end of the optical signal intensity detection element and outputs the third voltage signal, and the second end of the photosensitive element is also grounded through a third resistor;
and the first end of the third capacitor is connected with the first end of the photosensitive element, and the second end of the third capacitor is connected with the second end of the photosensitive element.
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