TWI755045B - Water quality sensing device and sensing method for vegetable and fruit cleaning - Google Patents

Abstract

The present invention relates to a water quality sensing device and a sensing method for washing vegetables and fruits, which are arranged inside a preset electronic device with a function of washing vegetables and fruits, comprising: a micro-control unit and a signal processing circuit to output a control signal; A sensing combination unit receives and detects the washing water produced by washing vegetables and fruits. The sensing combination unit further includes: a color sensor, a turbidity sensor and an ultraviolet light sensor. The sensing combination unit Receive the control signal of the signal processing circuit to activate, and detect a washing water color value, a washing water turbidity value and a washing water UV light value after the vegetables and fruits are washed, and the washing water color value and a clean water color value are combined Comparing and judging to obtain a color residual value, the vegetables and fruits are continuously washed and diluted so that the color residual value of the washing water is less than the color value of the clear water multiplied by a first preset ratio, and the washing water turbidity value and a clear water turbidity value Do a comparison and judgment to obtain a residual turbidity value, the vegetables and fruits are washed and diluted continuously so that the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset ratio, the ultraviolet light value of the washing water and a The ultraviolet light value of clean water is compared and judged to obtain a pesticide residue value, and the vegetables and fruits are continuously washed and diluted so that the pesticide residual value of the washing water is less than the ultraviolet light value of clean water multiplied by a third preset ratio.

Description

Water quality sensing device and sensing method for washing vegetables and fruits

The present invention provides a water quality sensing device and sensing method for washing vegetables and fruits, especially a composite sensing combination unit composed of a color sensor, a turbidity sensor and an ultraviolet sensor, which is used to The sequence of detection of vegetable juice liquid, sediment attached to the surface of vegetables and fruits, and pesticide attached to the surface of vegetables and fruits, because the present invention only turns on one sensor at a time to sense a single item and continuously cleans until the item is lower than the preset value, and the opening and closing have been completed. After the sensor, the next unexecuted sensor is turned on, so that the sensor is not interfered by other sensors and is more accurate in its judgment, and further achieves the purpose of saving water, electricity and time during cleaning.

According to the press, in recent years, food safety issues have gradually attracted attention, and consumers have become more and more concerned about whether there are pesticide residues in fruits and vegetables. However, pesticides are divided into systemic and non-systemic pesticides. Some non-systemic pesticides can be removed from the surface of fruits and vegetables after being washed with tap water for a preset time. Therefore, based on common sense, modern people will use artificial methods to wash fruits and vegetables with water, while those who are more particular will use vegetable and fruit washing machines for more detailed cleaning. , in order to achieve better cleaning effect.

Known domestic and foreign patents and related documents point out that some popular and commonly used pesticides have an absorption reaction with ultraviolet light, so as to detect the pesticide residues on the surface of vegetables and fruits. Vegetable and fruit surface After detection of pesticide residues, the cleaning operation is carried out. However, the value sensed by only a single fluorescent detector is not accurate enough, because the fluorescent sensor will be disturbed by non-pesticide substances such as sand, debris, juice and other non-pesticide substances on vegetables and fruits, and the wrongly sensed value will be detected. It will mislead the fluorescent sensor to judge that there are still pesticide residues, causing the user or the vegetable and fruit cleaning device to need to continue cleaning, resulting in excessive waste of water, electricity and time.

Therefore, in view of the above-mentioned problems and deficiencies, the inventor collected relevant information, and after multiple evaluations and considerations, the invention of the water quality sensing device and sensing method for washing vegetables and fruits was born.

The main purpose of the present invention is to provide a water quality sensing device for washing vegetables and fruits, which is arranged inside a preset electronic device with a function of washing vegetables and fruits, including: a micro-control unit and a signal processing circuit to output a control signal; a The sensing combination unit receives and detects the washing water generated by washing vegetables and fruits. The sensing combination unit further includes: a color sensor, a turbidity sensor and an ultraviolet light sensor. The sensing combination unit receives The control signal of the signal processing circuit is activated, and detects a color value of washing water, a turbidity value of washing water and a UV light value of washing water after washing vegetables and fruits, and compares the color value of washing water with a color value of clean water Judging to obtain a color residual value, the vegetables and fruits are washed and diluted continuously so that the color residual value of the washing water is less than the color value of the clean water multiplied by a first preset ratio, and the turbidity value of the washing water is compared with a clear water turbidity value. A comparative judgment is made to obtain a residual turbidity value. The vegetables and fruits are continuously washed and diluted so that the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset ratio. The ultraviolet light value of the washing water is equal to a clear water. The ultraviolet light value is compared and judged to obtain a pesticide residue value, and the vegetables and fruits are continuously washed and diluted so that the pesticide residue value of the washing water is less than the ultraviolet light value of the clean water multiplied by a third preset ratio. by The composite sensing unit composed of the aforementioned color sensor, turbidity sensor, and ultraviolet light sensor is used to sequentially detect vegetable juice liquid, sediment attached to the surface of vegetables and fruits, and pesticide attached to the surface of vegetables and fruits, because the present invention Only turn on one sensor at a time to sense a single item and keep cleaning until the item is lower than the preset value. After opening and closing the executed sensor, the next unexecuted sensor is turned on, so that the sensor can judge It is more accurate without interference from other sensors, and further achieves the purpose of saving water, electricity and time when cleaning.

The secondary purpose of the present invention is that the color value of the washing water detected by the color sensor is returned to the micro-control unit, and an amplifying circuit that amplifies the signal value is electrically connected between the two and the analog signal An analog/digital converter converted into a digital signal, and the color sensor is composed of a first light transmitter and a first light receiver, and the wavelength range of the light emitted by the first light transmitter is 400~ Visible light composed of 700nm RGB three colors, and the first preset ratio range is between 0.01~10.

Another object of the present invention is that the turbidity value of the washing water detected by the turbidity sensor is returned to the micro-control unit, and an amplifying circuit that amplifies the signal value is electrically connected between the two and that An analog/digital converter that converts an analog signal into a digital signal, and the turbidity sensor is composed of a second light transmitter and a second light receiver, and the wavelength range of light emitted by the second light transmitter is 800-1000 nm infrared light, and the second preset ratio range is between 0.01-10.

Another object of the present invention is that the ultraviolet light value of the washing water detected by the ultraviolet light sensor is returned to the micro-control unit, and an amplifying circuit that amplifies the signal value is electrically connected between the two, and An analog/digital converter that converts analog signals into digital signals, and the ultraviolet light sensor is composed of a third light transmitter and a third light receiver, and the third light emission The wavelength range of the light emitted by the device is ultraviolet light in the range of 200-300 nm, and the third preset ratio range is between 0.01-10.

Another object of the present invention is that the micro-control unit is further electrically connected with a storage unit for storing detected values, and is electrically connected to a system port of a predetermined electronic device, so that the micro-control unit and the The default electronic device performs a bidirectional signal transmission.

1: Default electronics

11: Micro Control Unit

12: Signal processing circuit

13: Sensing combination unit

131: Color Sensor

1311: First Light Emitter

1312: First Optical Receiver

132: Turbidity sensor

1321: Second Light Emitter

1322: Second Optical Receiver

133: UV light sensor

1331: Third Light Emitter

1332: Third Optical Receiver

14: Amplifier circuit

15: Analog/Digital Converters

16: Storage unit

17: System port

21: The washing water generated by the preset electronic device for cleaning vegetables and fruits is collected in a preset accommodating tank

22: The color sensor located inside the preset electronic device receives the control signal of the signal processing circuit and starts, and detects a color value of washing water in the preset accommodating tank, the color value of washing water and a color value of clean water Make a comparative judgment to obtain a color residual value, and the vegetables and fruits are continuously washed and diluted to reduce the color residual value of the washing water

23: Whether the color residual value of the washing water is less than the color value of the clean water multiplied by a first preset ratio

24: The turbidity sensor located inside the preset electronic device receives the control signal of the signal processing circuit, and controls the color sensor to turn off, then activates the turbidity sensor, and detects the preset capacity Set the turbidity value of one of the washing water in the tank, and compare the turbidity value of the washing water with the turbidity value of a clear water. to obtain a residual turbidity value, and the vegetables and fruits are continuously washed and diluted to reduce the residual turbidity value of the washing water

25: Whether the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset ratio

26: The ultraviolet light sensor located inside the preset electronic device receives the control signal of the signal processing circuit, and controls the turbidity sensor to turn off, then activates the ultraviolet light sensor, and detects the preset The ultraviolet light value of a washing water in the holding tank, the ultraviolet light value of the washing water is compared with the ultraviolet light value of a clean water to obtain a pesticide residue value, and the vegetables and fruits are continuously washed and diluted to reduce the pesticide residue value of the washing water.

27: Whether the pesticide residue value is less than the UV value of the clear water multiplied by a third preset ratio

28: Finish cleaning

[Fig. 1] is a functional block diagram of the water quality sensing device for washing vegetables and fruits according to the present invention.

[Fig. 2] is a flowchart of the implementation of the first part of the water quality measurement method for washing vegetables and fruits according to the present invention.

[Fig. 3] is a flow chart of the implementation of the second part of the water quality measurement method for washing vegetables and fruits according to the present invention.

In order to achieve the above objects and effects, the technical means and structures adopted by the present invention are described in detail with reference to the preferred embodiments of the present invention, and the features and functions are as follows, so as to be fully understood.

Please refer to FIG. 1, which is a functional block diagram of the water quality sensing device for washing vegetables and fruits according to the present invention. It can be clearly seen from the figure that the water quality sensing device for washing vegetables and fruits of the present invention is installed on One of the functions is preset inside the electronic device 1 . The preset electronic device 1 includes: a micro-control unit 11 , a signal processing circuit 12 , a sensing combination unit 13 , an amplifier circuit 14 , and an analog/translation converter 15 , a storage unit 16 and a system connection port 17, its main components and features are described in detail as follows:

The micro-control unit 11 is used for generating an output command after performing data processing operations.

The signal processing circuit 12 is used for receiving the output command of the microcontroller 11 and converted into a control signal.

The sensing combination unit 13 receives and detects the washing water generated by washing vegetables and fruits, and the sensing combination unit 13 includes a color sensor 131 for sensing vegetable juice liquid, and a turbidity sensor for sensing the sediment attached to the surface of vegetables and fruits. The sensor 132 and the UV sensor 133 for sensing the pesticides attached to the surface of vegetables and fruits, and the activation sequence is the color sensor 131, the turbidity sensor 132 and the UV sensor 133. The functions of each sensor are disclosed as follows :

The color sensor 131 is activated by receiving the control signal from the signal processing circuit 12, and detects a color value of washing water after the vegetables and fruits are washed, and compares the color value of the washing water with a color value of clean water (the color value of the washing water). Subtract the difference value of the color value of the clean water) to obtain a color residual value, and the vegetables and fruits are washed and diluted continuously so that the color residual value of the washing water is less than the color value of the clean water multiplied by a first preset ratio and returned to the micro-controller Unit 11, and its formula is as follows: ABS|RGB(N)-RGB _water |>0.1* RGB _water with color residue; ABS|RGB(N)-RGB _water |<0.1* RGB _water without color residue; in the above formula: RGB(N) is the color value of washing water; RGB _water is the color value of clean water.

The color value of the washing water detected by the color sensor 131 is sent back to the micro-control unit 11, and an amplifying circuit (Amplifying Circuit) 14 for amplifying the signal value is electrically connected between the two and an analog signal An analog to digital converter (Analog to Digital Converter, ADC) 15 converted into a digital signal, and the color sensor 131 is composed of a first light transmitter 1311 and a first light receiver 1312, and the color sensor 131 is composed of a first light transmitter 1311 and a first light receiver 1312. A light emitter 1311 emits visible light composed of three colors of RGB (Red, Green, Blue) with a wavelength range of 400-700 nm, and the first predetermined ratio range is between 0.01-10 , but its best practice ratio is 0.1.

The turbidity sensor 132 receives the control signal from the signal processing circuit 12, and controls the color sensor 131 to turn off, then activates the turbidity sensor 132, and detects the turbidity of a washing water after washing vegetables and fruits The turbidity value of the washing water is compared with the turbidity value of a clear water (the difference between the turbidity value of the washing water minus the turbidity value of the clear water) to obtain a residual turbidity value. The residual turbidity value of water is smaller than the turbidity value of clean water multiplied by a second preset ratio and returned to the micro-control unit 11, and the formula is as follows: ABS|TBS(N)-TBS _water | >0.1* TBS _water ; no sediment residue ABS|TBS(N)-TBS _water |<0.1* TBS _water ; in the above formula: TBS(N) is the turbidity value of washing water; TBS _water is the turbidity color value of clean water.

The turbidity value of the washing water detected by the turbidity sensor 132 is returned to the micro-control unit 11, and an amplifying circuit 14 that amplifies the signal value is electrically connected between the two and converts the analog signal into An analog/digital converter 15 for digital signals, and the turbidity sensor 132 is composed of a second light transmitter 1321 and a second light receiver 1322, and the wavelength of light emitted by the second light transmitter 1321 The range is 800-1000nm infrared light, and the second preset ratio range is between 0.01-10, but the best implementation ratio is 0.1.

The ultraviolet light sensor 133 receives the control signal from the signal processing circuit 12, and controls the turbidity sensor 132 to turn off, then activates the ultraviolet light sensor 133, and detects the ultraviolet light of a washing water after washing vegetables and fruits The light value, the UV light value of the washing water is compared with the UV light value of a clean water (the difference between the UV light value of the washing water minus the UV light value of the clean water) to obtain a pesticide residue value. The pesticide residue value of the water is smaller than the UV value of the clear water multiplied by a third preset ratio and returned to the micro-control unit 11, and the formula is as follows: there is pesticide residue ABS|UVS(N)-UVS _water |>0.1 * UVS _water ; no pesticide residues ABS|UVS(N)-UVS _water |<0.1* UVS _water ; In the above formula: UVS(N) is the UV value of washing water; UVS _water is the UV value of clean water.

The ultraviolet light value of the washing water detected by the ultraviolet light sensor is returned to the micro-control unit 11, and an amplifying circuit 14 that amplifies the signal value is electrically connected between the two, and the analog signal is converted into An analog/digital converter 15 for digital signals, and the ultraviolet light sensor 133 is composed of a third light transmitter 1331 and a third light receiver 1332, and the wavelength of light emitted by the third light transmitter 1331 The range of ultraviolet light is 200-300 nm, and the third preset ratio range is between 0.01-10, but the best implementation ratio is 0.1.

The micro-control unit 11 is further electrically connected to a storage unit 16 for storing detected values, and is electrically connected to a system port 17 of a predetermined electronic device 1 , so that the micro-control unit 11 A two-way signal transmission is performed with the preset electronic device 1 .

The aforementioned sensing combination unit 13 includes a color sensor 131 for sensing vegetable juice juice, a turbidity sensor 132 for sensing sediment attached to the surface of vegetables and fruits, and an ultraviolet light sensor 133 for sensing pesticides attached to the surface of vegetables and fruits. According to the different positioning of the pre-set electronic device 1 with the function of cleaning vegetables and fruits, the price and the high-end product are different. For example, the high-end default electronic device 1 also includes a color sensor 131, a turbidity sensor 132, and an ultraviolet light sensor 133, which can sequentially detect vegetable juice liquid, sediment attached to the surface of vegetables and fruits, and vegetables and fruits. Pesticides are attached to the surface. Since the three sensors have independent sensing functions, the high-end preset electronic device 1 can accurately sense the residues of vegetable juice, sediment and pesticides in a short period of time, and can save water at the same time. and power saving function. On the contrary, the cheap default electronic device 1 only includes two sensors: the turbidity sensor 132 and the ultraviolet light sensor 133, so it can only detect the sediment adhered to the surface of vegetables and fruits and the pesticide adhered to the surface of vegetables and fruits in sequence. , because it lacks the detection function of vegetable juice, so when the turbidity sensor 132 is executed first, the turbidity sensor 132 is susceptible to the interference of the vegetable juice and causes misjudgment, so the sensing time of the turbidity sensor 132 is executed. It will be elongated. Although the function and effect of the cheap default electronic device 1 for sensing sediment and pesticide residues are the same as those of the high-end default electronic device 1, its disadvantage is that the consumption of water and electricity increases accordingly. The low-priced default electronic device 1 and the high-end default electronic device 1 are both implementable aspects of the present invention, so they are both proposed for protection.

Please refer to Figures 2 and 3, which are the first and second part of the implementation flow chart of the water quality measurement method for washing vegetables and fruits of the present invention, and please refer to Figure 1 at the same time. In a preset electronic device 1, the preset electronic device 1 includes a micro-control unit 11, a signal processor 12, a color sensor 131, a turbidity sensor 132, and an ultraviolet light sensor 133, It includes the following steps:

Step 21 : The washing water generated by the preset electronic device for washing vegetables and fruits is collected in a preset accommodating tank.

Step 22: The color sensor inside the preset electronic device receives the control signal of the signal processing circuit and starts, and detects a color value of washing water in the preset accommodating tank, the color value of washing water and a color of clean water The value is compared and judged to obtain a color residual value, and the vegetables and fruits are continuously washed and diluted to reduce the color residual value of the washing water.

Step 23: Is the color residual value of the washing water smaller than the color value of the clean water multiplied by a first preset ratio? If yes, go to step 24; if so, go to step 22.

Step 24: The turbidity sensor inside the preset electronic device receives the control signal of the signal processing circuit, and controls the color sensor to turn off, then activates the turbidity sensor, and detects the preset The turbidity value of a washing water in the accommodating tank, the turbidity value of the washing water is compared with the turbidity value of a clear water to obtain a residual turbidity value, and the vegetables and fruits are continuously washed and diluted to reduce the turbidity of the washing water. residual value.

Step 25: Whether the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset ratio? If yes, go to step 26; if so, go to step 24.

Step 26: The ultraviolet light sensor located inside the preset electronic device receives the control signal of the signal processing circuit, and controls the turbidity sensor to turn off, then activates the ultraviolet light sensor, and detects the predetermined Set the ultraviolet light value of a washing water in the holding tank, and compare the ultraviolet light value of the washing water with the ultraviolet light value of a clean water to obtain a pesticide residue value, and the vegetables and fruits are continuously washed and diluted to reduce the pesticide residue in the washing water. value.

Step 27: Is the pesticide residue value less than the UV value of the clear water multiplied by a third preset ratio? If yes, go to step 28; if so, go to step 26.

Step 28: Finish cleaning.

From the disclosure of the above-mentioned Figures 1 to 3, it can be understood that the present invention provides a water quality sensing device and a sensing method for washing vegetables and fruits, which are arranged inside a preset electronic device with a function of washing vegetables and fruits, including: a The micro-control unit and a signal processing circuit output a control signal; a sensing combination unit receives and detects the washing water generated by washing vegetables and fruits, and the sensing combination unit further includes: a color sensor, a turbidity sensor and an ultraviolet light sensor, the sensing combination unit is activated by receiving the control signal of the signal processing circuit, and detects a washing water color value, a washing water turbidity value and a washing water ultraviolet light after the vegetables and fruits are washed The color value of the washing water is compared with a color value of clean water to obtain a color residual value. The vegetables and fruits are continuously washed and diluted so that the color residual value of the washing water is less than the color value of the clean water multiplied by a first preset ratio. , and the turbidity value of the washing water is compared with the turbidity value of a clear water to obtain a residual turbidity value. The vegetables and fruits are continuously washed and diluted so that the residual turbidity value of the washing water is less than the turbidity value of the clear water multiplied by a In the second preset ratio, the UV light value of the washing water is compared with the UV light value of a clear water to obtain a pesticide residue value. The vegetables and fruits are continuously washed and diluted so that the pesticide residue value of the washing water is less than the clear water purple value. The external light value is multiplied by a third predetermined ratio. The composite sensing unit composed of the aforementioned color sensor, turbidity sensor and UV light sensor is used to sequentially detect the vegetable juice liquid, the sediment attached to the surface of the vegetable and fruit, and the pesticide attached to the surface of the vegetable and fruit, because The present invention only turns on one sensor at a time to sense a single item and continuously cleans it until the item is lower than the preset value. After opening and closing the sensor that has been executed, the next unexecuted sensor is turned on, so that the sensor can be sensed. The device judgment is more accurate without interference from other sensors, and further achieves the purpose of saving water, electricity and time when cleaning. The present invention has excellent practicability when applied to electronic devices such as vegetable and fruit washing machines, and can be sold in the commercial market with great success. Therefore, a patent application is filed to seek patent protection.

The above are only the preferred embodiments of the present invention, which do not limit the patent scope of the present invention. Therefore, any simple modifications and equivalent structural changes made by using the contents of the description and drawings of the present invention should be similarly included in the present invention. Within the scope of the patent, I agree to Chen Ming.

To sum up, the above-mentioned water quality sensing device and sensing method for washing vegetables and fruits of the present invention can indeed achieve its efficacy and purpose when it is used. Therefore, the present invention is an invention with excellent practicability and is in line with the application for a patent for invention. If you have any doubts, please do not hesitate to send a letter for instructions, and the inventor will make every effort to cooperate, which is really appreciated.

1: Default electronics

11: Micro Control Unit

12: Signal processing circuit

13: Sensing combination unit

131: Color Sensor

1311: First Light Emitter

1312: First Optical Receiver

132: Turbidity sensor

1321: Second Light Emitter

1322: Second Optical Receiver

133: UV light sensor

1331: Third Light Emitter

1332: Third Optical Receiver

14: Amplifier circuit

15: Analog/Digital Converters

16: Storage unit

17: System port

Claims (13)

A water quality sensing device for washing vegetables and fruits, which is arranged inside a preset electronic device with the function of washing vegetables and fruits, comprising: a micro-control unit for generating an output command after data processing operation; a signal processing circuit, It is used to receive the output command of the micro-control unit and convert it into a control signal; a sensing combination unit, which receives and detects the washing water produced by washing vegetables and fruits, and further includes: a turbidity sensor, which receives the The control signal of the signal processing circuit is activated, and a turbidity value of the washing water after the vegetables and fruits are washed is detected, and the turbidity value of the washing water is compared with a turbidity value of clean water to obtain a residual turbidity value. Washing and diluting so that the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset ratio and sent back to the micro-control unit, and the turbidity sensor detects the turbidity of the washing water The value is sent back to the micro-control unit, and the amplifying circuit for amplifying the signal value and the analog/digital converter for converting the analog signal into a digital signal are electrically connected between the two; and an ultraviolet light sensor , which receives the control signal of the signal processing circuit, and controls the turbidity sensor to turn off and then activates the ultraviolet light sensor, and detects a washing water ultraviolet light value after the vegetables and fruits are washed, the washing water ultraviolet light The value is compared with a clear water UV light value to obtain a pesticide residue value. The vegetables and fruits are continuously washed and diluted so that the pesticide residue value in the washing water is less than the clear water UV light value multiplied by a third preset ratio and returned to The micro-control unit, and the ultraviolet light value of the washing water detected by the ultraviolet light sensor is returned to the micro-control unit, and an amplifying circuit for amplifying the signal value is electrically connected between the two, and An analog/digital converter that converts an analog signal to a digital signal. The water quality sensing device for washing vegetables and fruits as claimed in claim 1, wherein the sensing combination unit further comprises a color sensor, which receives the control signal from the signal processing circuit and activates, and detects a washing water after washing the vegetables and fruits. Color value, the color value of the washing water is compared with a color value of clean water to obtain a color residual value. The vegetables and fruits are continuously washed and diluted so that the color residual value of the washing water is less than the color value of the clean water multiplied by a first preset value. The ratio is sent back to the micro-control unit, and the color sensor is activated before the turbidity sensor, and the turbidity sensor is activated after the color sensor is turned off, and the color The color value of the washing water detected by the sensor is sent back to the micro-control unit, and an amplifying circuit for amplifying the signal value and an analog/digital signal for converting the analog signal into a digital signal are electrically connected between the two. converter. The water quality sensing device for washing vegetables and fruits as claimed in claim 2, wherein the color sensor is composed of a first light transmitter and a first light receiver, and the wavelength range of the light emitted by the first light transmitter is 400 Visible light composed of RGB three colors of ~700nm, and the first preset ratio range is between 0.01~10. The water quality sensing device for washing vegetables and fruits as claimed in claim 1, wherein the turbidity sensor is composed of a second light emitter and a second light receiver, and the wavelength range of the light emitted by the second light emitter is 800~1000nm infrared light, and the second preset ratio range is between 0.01~10. The water quality sensing device for washing vegetables and fruits as claimed in claim 1, wherein the ultraviolet light sensor is composed of a third light emitter and a third light receiver, and the wavelength range of the light emitted by the third light emitter is 200~300nm ultraviolet light, and the third preset ratio range is between between 0.01 and 10. The water quality sensing device for washing vegetables and fruits as claimed in claim 1, wherein the micro-control unit is further electrically connected with a storage unit for storing detected values, and is electrically connected with a system port of a predetermined electronic device, so as to Make a bidirectional signal transmission between the micro-control unit and the preset electronic device. A method for sensing water quality for washing vegetables and fruits, which is applied to a preset electronic device with a function of washing vegetables and fruits. The preset electronic device includes a micro-control unit, a signal processor, a color sensor, and a turbidity sensor. A detector, an ultraviolet light sensor, includes the following steps: (a) the washing water generated by the preset electronic device for cleaning vegetables and fruits is collected in a preset accommodating tank; (b) the preset electronic device is located inside the device. The turbidity sensor receives the control signal of the signal processing circuit, and detects a turbidity value of washing water in the preset accommodating tank, and compares the turbidity value of the washing water with a turbidity value of clean water to determine Obtain a residual turbidity value, and the vegetables and fruits are continuously washed and diluted to reduce the residual turbidity value of the washing water; (c) whether the residual turbidity value of the washing water is less than the turbidity value of the clean water multiplied by a second preset value ratio? If yes, go to step (d); if yes, go to step (b); (d) the ultraviolet light sensor inside the preset electronic device receives the control signal of the signal processing circuit, and controls the turbidity After the sensor is turned off, the ultraviolet light sensor is activated, and a washing water ultraviolet light value in the preset container is detected, and the washing water ultraviolet light value is compared with a clear water ultraviolet light value to obtain 1 pesticide residue value, and the vegetables and fruits are continuously washed and diluted to reduce the pesticide residue value in the washing water; (e) Is the pesticide residue value less than the UV value of the clear water multiplied by a third preset ratio? If yes, perform step (f); if not, perform step (d); and (f) end the cleaning. The method for sensing the water quality of washing vegetables and fruits as claimed in claim 7, further comprising a step (a1) between the steps (a) and (b), wherein the color sensor inside the preset electronic device receives the signal and processes it The control signal of the circuit is activated, and a color value of washing water in the preset container is detected, and the color value of the washing water is compared with a color value of clean water to obtain a color residual value, and the vegetables and fruits are washed and diluted continuously. In order to reduce the color residual value of washing water. According to the method for sensing the water quality of washing vegetables and fruits of claim 8, after the step (a1) is completed, a step (a2) is further executed to determine whether the color residual value of the washing water is less than the color value of the clean water multiplied by one The first preset ratio? If yes, go to step (b); if so, go to step (a1). The method for sensing the water quality of washing vegetables and fruits as claimed in claim 8, wherein the color value of the washing water detected by the color sensor in the step (a1) is sent back to the micro-control unit, and moreover, the electrical power between the two is carried out. an amplifying circuit that amplifies the signal value and an analog/digital converter that converts the analog signal into a digital signal are sexually connected, and the color sensor is composed of a first light transmitter and a first light receiver, and The first light emitter emits visible light composed of RGB three colors with a wavelength range of 400-700 nm, and the first predetermined ratio range is between 0.01-10. The method for sensing the water quality of washing vegetables and fruits as claimed in claim 7, wherein the turbidity value of the washing water detected by the turbidity sensor in the step (b) is returned to the micro-control unit, and more particularly An amplifying circuit for amplifying the signal value and an analog/digital converter for converting the analog signal into a digital signal are electrically connected between the two, and the turbidity sensor is a second light emitter and a second It is composed of a light receiver, and the second light transmitter emits infrared light with a wavelength range of 800-1000 nm, and the second preset ratio range is between 0.01-10. The method for sensing the water quality of vegetable and fruit washing as claimed in claim 7, wherein the ultraviolet light value of the washing water detected by the ultraviolet light sensor in the step (d) is returned to the micro-control unit, and more particularly related to the two An amplifying circuit for amplifying the signal value and an analog/digital converter for converting the analog signal into a digital signal are electrically connected between them, and the ultraviolet light sensor is a third light transmitter and a third light receiver and the wavelength range of the light emitted by the third light emitter is ultraviolet light in the range of 200-300 nm, and the third preset ratio range is between 0.01-10. The sensing method for washing water quality of vegetables and fruits as claimed in claim 7, wherein the micro-control unit is further electrically connected with a storage unit for storing detected values, and is electrically connected with a system port of a predetermined electronic device, so as to Make a bidirectional signal transmission between the micro-control unit and the preset electronic device.

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