CN105455757A - Turbidity detection system with calibration function, detection method and dish washing machine - Google Patents
Turbidity detection system with calibration function, detection method and dish washing machine Download PDFInfo
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- CN105455757A CN105455757A CN201410441240.5A CN201410441240A CN105455757A CN 105455757 A CN105455757 A CN 105455757A CN 201410441240 A CN201410441240 A CN 201410441240A CN 105455757 A CN105455757 A CN 105455757A
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Abstract
The invention discloses a turbidity detection system with the calibration function and belongs to the technical field of washing. The detection system is designed in order to solve the problem of turbidity signal detection deviation, caused by pollutants, of a turbidity sensor. The detection system comprises a control unit, the turbidity sensor and a calibration unit, wherein the turbidity sensor and the calibration unit are connected with the control unit. The control unit presets the turbidity voltage signal standard value and the calibration deviation value range of clear water, compares a received voltage signal detected value, detected by the turbidity sensor, of washing water with the turbidity voltage signal standard value, and controls the calibration unit to started or stopped according to whether the difference value or the specific value of the voltage signal detected value and the turbidity voltage signal standard value is within the calibration deviation range or not. The calibration unit is used for adjusting the voltage signal detected value to reach or be close to the turbidity voltage signal standard value. The invention further discloses a detection method to which the detection program is applied and a dish washing machine. The calibration unit can adjust the voltage signal detected value, detected by the turbidity sensor, of the washing water to reach or be close to the turbidity voltage signal standard value, and then automatic calibration of the turbidity sensor is achieved.
Description
Technical field
The invention belongs to washing technology field, relate to a kind of Turbidity measurement system with calibration function, detection method and apply the dish-washing machine of this detection method.
Background technology
Because turbidity transducer is in the lower middle portion of tank, dish-washing machine is after washing a period of time, if the water hardness is high, some incrustation scales can be produced on the surface of turbidity transducer, equally also may cause turbidity transducer surface contamination because the material of some viscosity blocks, will there is deviation with the signal of original setting in the signal that the turbidity transducer of surface contamination is transferred to master control borad, such master control borad judges that the washing procedure provided also there will be deviation.
Concrete, turbidity transducer feeds back to the magnitude of voltage of master control borad can be inaccurate.Such as: under normal circumstances, the voltage preset value of clear water is 4.7V, after but there is incrustation scale on turbidity transducer surface, the voltage of clear water may become about 3V, then in the process of washing, turbidity transducer reads once the magnitude of voltage under dirty washings state again, and when Non-scale, the magnitude of voltage of addle is 3V, when having incrustation scale, the magnitude of voltage of dirty washings is 1.5V.If turbidity transducer surface does not have incrustation scale, voltage difference before and after washing is 4.7-3=1.7V, if there is incrustation scale on turbidity transducer surface, voltage difference before and after washing may become about 3-1.5=1.5V, under washing state same like this, there are two kinds of different differences, master control borad will take different washing procedures according to different differences, thus cause dish-washing machine to judge the clean level of washings in inaccurate washing process, so just there will be situation about not washing clean, bring inconvenience.
Summary of the invention
An object of the present invention proposes a kind of Turbidity measurement system that can realize the band calibration function of turbidity transducer automatic calibration.
Two of object of the present invention proposes a kind of detection method solving washings Turbidity measurement and occur deviation.
Three of object of the present invention proposes a kind of clean level that accurately can judge washings, and clean result is good, facilitates the dish-washing machine of Consumer's Experience.
For reaching this object, the present invention by the following technical solutions:
The invention provides a kind of Turbidity measurement system with calibration function, the turbidity transducer comprising control unit and be connected with described control unit, also comprise the alignment unit be connected with described control unit; Wherein,
Control unit, preset turbidity voltage signal standard value and the calibration deviate scope of clear water, and the turbidity voltage signal standard value receiving described turbidity transducer and detect the voltage signal detected value that exports of washings and clear water is contrasted, within the scope of described calibration deviate, unlatching or the closedown of described alignment unit whether is controlled according to both difference or ratio;
Alignment unit, the voltage signal detected value detected for regulating described turbidity transducer reaches or close to described turbidity voltage signal standard value.
Further, described alignment unit comprises filtration module and voltage transformation module, the input of described filtration module is connected with the output of described control unit, the output of described filtration module is connected with the input of described voltage transformation module, and the output of described voltage transformation module is connected with described turbidity transducer.
Further, the Turbidity measurement system of described band calibration function also comprises the warning device be connected with described control unit;
When the difference of the voltage signal detected value that described turbidity transducer detects and described turbidity voltage signal standard value higher than described calibration deviate scope or both ratio lower than described calibration deviate scope time, described control unit controls described warning device and sends alarm, the turbidity transducer that prompting user cleans described turbidity transducer or more renews.
Present invention also offers a kind of detection method of Turbidity measurement system of band calibration function described above, comprise the following steps:
S1: described control unit presets turbidity voltage signal standard value and the calibration deviate scope of clear water, and also turbidity transducer described in timing receipt detects the turbidity voltage signal detected value of washings;
S2: described turbidity voltage signal detected value and described turbidity voltage signal standard value contrast by described control unit, the difference of both judgements or ratio, whether within the scope of described calibration deviate, if so, then open described alignment unit; If not, then described alignment unit is closed.
Further, described step S2 comprises the following steps:
S203: described control unit judges that the difference of described turbidity voltage signal detected value and described turbidity voltage signal standard value is whether within the scope of described calibration deviate, if so, then performs step S204;
S204: open described alignment unit, described control unit timing receives the turbidity voltage signal detected value after the calibration of described turbidity transducer detection again;
S205: described control unit judges that whether the difference of the turbidity voltage signal detected value after calibrating and described turbidity voltage signal standard value is lower than described calibration deviate scope, if so, then performs step S206 again; If not, described step S204 is returned;
S206: close described alignment unit.
Further, described step S2 is further comprising the steps of:
In described step S203, if described control unit judges that the difference of described turbidity voltage signal detected value and described turbidity voltage signal standard value is higher than described calibration deviate scope, then perform step S209;
S209: start described warning device, the turbidity transducer that prompting user cleans described turbidity transducer or more renews.
Further, described step S2 comprises the following steps:
S303: described control unit judges that the ratio of described turbidity voltage signal detected value and described turbidity voltage signal standard value is whether within the scope of described calibration deviate, if so, then performs step S304;
S304: open described alignment unit, described control unit timing receives the turbidity voltage signal detected value after the calibration of described turbidity transducer detection again;
S305: described control unit judges that whether the ratio of the turbidity voltage signal detected value after calibrating and described turbidity voltage signal standard value is higher than described calibration deviate scope, if so, then performs step S306 again; If not, described step S304 is returned;
S306: close described alignment unit.
Further, described step S2 is further comprising the steps of:
In described step S303, if described control unit judges that the ratio of described turbidity voltage signal detected value and described turbidity voltage signal standard value is lower than described calibration deviate scope, then perform step S309;
S309: start described warning device, the turbidity transducer that prompting user cleans described turbidity transducer or more renews.
Further, the turbidity voltage signal detected value of turbidity transducer detection washings described in described control unit timing receipt and the timing of described control unit receive the turbidity voltage signal detected value after the calibration of described turbidity transducer detection again, are specially described control unit receives the detection of described turbidity transducer turbidity voltage signal detected value every 5-20s.
Invention further provides a kind of dish-washing machine, described dish-washing machine can apply detection method described above.
Beneficial effect of the present invention is:
The invention provides a kind of Turbidity measurement system with calibration function, the control unit of this detection system can detect according to turbidity transducer unlatching or the closedown whether difference of the voltage signal detected value of washings and the turbidity voltage signal standard value of default clear water or ratio control alignment unit within the scope of default calibration deviate, to be reached by alignment unit regulation voltage signal detected value or close to turbidity voltage signal standard value, have modified the Turbidity measurement deviation of signal of the turbidity transducer that pollutant causes, achieve the automatic calibration of turbidity transducer.
Present invention also offers a kind of detection method, this detection method comprises the following steps: S1: control unit presets turbidity voltage signal standard value and the calibration deviate scope of clear water, and the timing of timing receipt turbidity transducer detects the turbidity voltage signal detected value of washings; S2: turbidity voltage signal detected value and turbidity voltage signal standard value contrast by control unit, the difference of both judgements or ratio, whether calibrating within the scope of deviate, if so, then open alignment unit; If not, then alignment unit is closed.This detection method solves the turbid ity signal detection error problem that turbidity transducer causes due to pollutant, reaches the effect that balance incrustation scale stops.
Present invention also offers a kind of dish-washing machine, this dish-washing machine can apply detection method described above.This dish-washing machine achieves the clean level accurately judging washings, effectively improves clean result, facilitates Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Turbidity measurement system of the embodiment of the present invention one with calibration function;
Fig. 2 is the structural representation of the embodiment of the present invention one turbidity transducer;
Fig. 3 is the workflow diagram of the detection method of the Turbidity measurement system of the band calibration function that the embodiment of the present invention two provides;
Fig. 4 is the workflow diagram of the detection method of the Turbidity measurement system of the band calibration function that the embodiment of the present invention three provides.
In figure, 1, control unit; 2, turbidity transducer; 21, optical transmitting set; 22, light absorber; 3, alignment unit; 31, filtration module; 32, voltage transformation module.
Detailed description of the invention
Specifically introduce the structure of the Turbidity measurement system with calibration function in the present invention below by following examples and accompanying drawing, and apply the detection method of this Turbidity measurement system.
Embodiment one:
Present embodiments provide a kind of Turbidity measurement system with calibration function, the structure of the Turbidity measurement system of this band calibration function as depicted in figs. 1 and 2, it turbidity transducer 2 comprising control unit 1 and be connected with control unit 1.As shown in Figure 2, turbidity transducer 2 comprises optical transmitting set 21 and light absorber 22, and optical transmitting set 21 is connected with control unit 1 respectively with light absorber 22.When turbidity transducer 2 surface has incrustation scale or adhesive contaminant, first the light that optical transmitting set 21 is launched stopped or scattering, and then through the scattered radiation of water body on light absorber 22, so, the turbid ity signal intensity that light absorber 22 receives will weaken, and the turbid ity signal feeding back to control unit 1 reduces equally, so, cause turbidity transducer 2 to occur turbid ity signal detection error, finally cause turbid ity signal detected value inaccurate.In addition, the crest of optical transmitting set 21 and light absorber 22 is equal, can obtain better Detection results.
In use accurately cannot detect the problem of turbid ity signal in order to solve turbidity transducer 2, the application circuit of turbidity transducer 2 increases alignment unit 3.As shown in Figure 1, alignment unit 3 comprises filtration module 31 and voltage transformation module 32, the input of filtration module 31 is connected with the output of control unit 1, the output of filtration module 31 is connected with the input of voltage transformation module 32, and the output of voltage transformation module 32 is connected with turbidity transducer 2.
Wherein, control unit 1 presets turbidity voltage signal standard value and the calibration deviate scope of clear water, and the turbidity voltage signal standard value receiving turbidity transducer 2 and detect voltage signal detected value that washings export and clear water is contrasted, within the scope of calibration deviate, unlatching or the closedown of alignment unit 3 whether is controlled according to both difference or ratio.The voltage signal detected value that the unlatching of alignment unit 3 then can regulate turbidity transducer 2 to detect reaches or close to turbidity voltage signal standard value.So, have modified the Turbidity measurement deviation of signal of the turbidity transducer that pollutant causes, achieve the automatic calibration of turbidity transducer.
Such as, when the surperficial Non-scale of turbidity transducer 2 (i.e. clear water), the voltage signal detected value detected is 4.7V, when turbidity transducer 2 surface has incrustation scale, the shading degree of incrustation scale makes the perception degree of turbidity transducer 2 at least reduce by 30%, the voltage signal detected value detected is less than 3.3V, control unit 1 PWM port that can control in alignment unit 3 circuit produces adjusts wide pulse signal, the voltage of optical transmitting set 21 in turbidity transducer 2 is heightened, when voltage-regulation is to the turbidity voltage signal standard value preset, stop regulating, thus achieve the calibration of turbidity transducer 2 pairs of Turbidity measurement deviation of signals.
Turbidity measurement system with calibration function also comprises the warning device be connected with control unit 1.The voltage signal detected value detected when turbidity transducer 2 and the difference of turbidity voltage signal standard value are higher than calibrating deviate scope or both ratio lower than when calibrating deviate scope, control unit 1 controls warning device and sends alarm, the turbidity transducer 2 that prompting user cleans turbidity transducer 2 or more renews.
The control unit of the present embodiment can detect according to turbidity transducer unlatching or the closedown whether difference of the voltage signal detected value of washings and the turbidity voltage signal standard value of default clear water or ratio control alignment unit within the scope of default calibration deviate, to be reached by alignment unit regulation voltage signal detected value or close to turbidity voltage signal standard value, have modified the Turbidity measurement deviation of signal of the turbidity transducer that pollutant causes, achieve the automatic calibration of turbidity transducer.
Embodiment two:
Present embodiments provide a kind of detection method, adopt the Turbidity measurement system of the band calibration function described in embodiment one to carry out the Turbidity measurement of washings.To be applied in dish-washing machine, as shown in Figure 3, this detection method comprises the following steps:
S201: control unit 1 presets the turbidity voltage signal standard value V of clear water
0with calibration deviate scope △ V.Such as, the turbidity voltage signal standard value V of clear water
0=4.7, calibration deviate scope △ V are set to [1.4,2.5).
S202: dish-washing machine enters clear water, when water level is higher than turbidity transducer 2, dish-washing machine suspends 35s, and control unit 1 receives every 5s the turbidity voltage signal detected value V that turbidity transducer 2 detects washings
n.
S203: control unit 1 judges △ V
n'=V
n-V
0whether calibration deviate scope △ V be [1.4,2.5) in, if so, then execution step S204; If not, then step S208 is performed.
S204: open alignment unit 3, the turbidity voltage signal detected value V of control unit 1 after 5s receives the calibration of turbidity transducer 2 detection again
n+1.
S205: control unit 1 judges △ V
n+1'=V
n+1-V
0whether lower than calibration deviate scope △ V be [1.4,2.5), if so, then execution step S206; If not, then execution step S204 is returned.
S206: close alignment unit 3.
S207: dish-washing machine carries out general washing operation.
S208: control unit 1 judges △ V
n'=V
n-V
0whether higher than calibration deviate scope △ V be [1.4,2.5), if so, then execution step S209; If not, then step S207 is performed.
S209: start warning device, the turbidity transducer that prompting user cleans turbidity transducer 2 or more renews.
The present embodiment control unit is by judging whether the turbidity transducer detection turbidity voltage signal detected value of washings and the difference of turbidity voltage signal standard value are calibrating the unlatching or closedown that control alignment unit within the scope of deviate, and alignment unit adjustable voltage value detection signal reaches or close to turbidity voltage signal standard value, solve the turbid ity signal detection error problem that turbidity transducer causes due to pollutant, reach the effect that balance incrustation scale stops.
Embodiment three:
Present embodiments provide another kind of detection method, equally, adopt the Turbidity measurement system of the band calibration function described in embodiment one to carry out the Turbidity measurement of washings.To be applied in dish-washing machine, as shown in Figure 4, this detection method comprises the following steps:
S301: control unit 1 presets the turbidity voltage signal standard value V of clear water
0with calibration deviate scope f.Such as, the turbidity voltage signal standard value V of clear water
0=4.7, f is the ratio that turbidity transducer 2 detects the turbidity voltage signal detected value of washings and the turbidity voltage signal standard value of clear water, can be set to [0.5,0.7).
S302: dish-washing machine enters clear water, when water level is higher than turbidity transducer 2, dish-washing machine suspends 35s, and control unit 1 receives every 5s the turbidity voltage signal detected value V that turbidity transducer 2 detects washings
n.
S303: control unit 1 judges f
n'=V
n/ V
0whether calibration deviate scope f be [0.5,0.7) in, if so, then execution step S304; If not, then step S308 is performed.
S304: open alignment unit 3, the turbidity voltage signal detected value V of control unit 1 after 5s receives the calibration of turbidity transducer 2 detection again
n+1.
S305: control unit 1 judges f
n+1'=V
n+1/ V
0whether higher than calibration deviate scope f be [0.5,0.7), if so, then execution step S306; If not, then execution step S304 is returned.
S306: close alignment unit 3.
S307: dish-washing machine carries out general washing operation.
S308: control unit 1 judges f
n'=V
n/ V
0whether lower than calibration deviate scope f be [0.5,0.7), if so, then execution step S309; If not, then step S307 is performed.
S309: start warning device, the turbidity transducer that prompting user cleans turbidity transducer 2 or more renews.
With embodiment two unlike: the present embodiment control unit then by judging whether the ratio of turbidity voltage signal detected value and turbidity voltage signal standard value that turbidity transducer detects washings is calibrating the unlatching or closedown that control alignment unit within the scope of deviate, and alignment unit adjustable voltage value detection signal reaches or close to turbidity voltage signal standard value.The present embodiment solves the turbid ity signal detection error problem that turbidity transducer causes due to pollutant equally, reaches the effect that balance incrustation scale stops.
Control unit of the present invention be not limited to every 5s receive turbidity transducer detect turbidity voltage signal detected value, can also in 5-20s arbitrary time carry out timing detect, its concrete interval time can according to real work needs arbitrarily arrange.
The present invention is not limited to and adopts embodiment two and the detection method described in embodiment three, other can also be adopted to have the detection method of similar operation principle, the clean level that dish-washing machine accurately judges washings can be met, effectively promote clean result, facilitate the requirement of Consumer's Experience.
In addition, the Turbidity measurement system of band calibration function of the present invention and detection method are not limited to and are applied in dish-washing machine, can also being applied in washing machine or other washing facilitys, occurring the problem of deviation for solving washings Turbidity measurement, promote clean result, facilitate Consumer's Experience.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. the Turbidity measurement system with calibration function, the turbidity transducer (2) comprising control unit (1) and be connected with described control unit (1), is characterized in that: also comprise the alignment unit (3) be connected with described control unit (1); Wherein,
Control unit (1), preset turbidity voltage signal standard value and the calibration deviate scope of clear water, and the turbidity voltage signal standard value that described turbidity transducer (2) detects the voltage signal detected value that exports of washings and clear water will be received contrast, within the scope of described calibration deviate, unlatching or the closedown of described alignment unit (3) whether is controlled according to both difference or ratio;
Alignment unit (3), the voltage signal detected value for regulating described turbidity transducer (2) to detect reaches or close to described turbidity voltage signal standard value.
2. the Turbidity measurement system of band calibration function according to claim 1, it is characterized in that: described alignment unit (3) comprises filtration module (31) and voltage transformation module (32), the input of described filtration module (31) is connected with the output of described control unit (1), the output of described filtration module (31) is connected with the input of described voltage transformation module (32), and the output of described voltage transformation module (32) is connected with described turbidity transducer (2).
3. the Turbidity measurement system of band calibration function according to claim 1 and 2, is characterized in that: the Turbidity measurement system of described band calibration function also comprises the warning device be connected with described control unit (1);
When the difference of the voltage signal detected value that described turbidity transducer (2) detects and described turbidity voltage signal standard value higher than described calibration deviate scope or both ratio lower than described calibration deviate scope time, described control unit (1) controls described warning device and sends alarm, the turbidity transducer (2) that prompting user cleans described turbidity transducer (2) or more renews.
4. a detection method for the Turbidity measurement system of the band calibration function as described in as arbitrary in claim 1-3, is characterized in that: comprise the following steps:
S1: described control unit (1) presets turbidity voltage signal standard value and the calibration deviate scope of clear water, and turbidity transducer described in timing receipt (2) detects the turbidity voltage signal detected value of washings;
S2: described turbidity voltage signal detected value and described turbidity voltage signal standard value contrast by described control unit (1), whether the difference of both judgements or ratio is within the scope of described calibration deviate, if so, described alignment unit (3) is then opened; If not, then described alignment unit (3) is closed.
5. detection method according to claim 4, is characterized in that: described step S2 comprises the following steps:
S203: described control unit (1) judges that the difference of described turbidity voltage signal detected value and described turbidity voltage signal standard value is whether within the scope of described calibration deviate, if so, then performs step S204;
S204: open described alignment unit (3), described control unit (1) timing receives the turbidity voltage signal detected value after the calibration that described turbidity transducer (2) detects again;
S205: described control unit (1) judges that whether the difference of the turbidity voltage signal detected value after calibrating and described turbidity voltage signal standard value is lower than described calibration deviate scope, if so, then performs step S206 again; If not, described step S204 is returned;
S206: close described alignment unit (3).
6. detection method according to claim 5, is characterized in that: described step S2 is further comprising the steps of:
In described step S203, if described control unit (1) judges that the difference of described turbidity voltage signal detected value and described turbidity voltage signal standard value is higher than described calibration deviate scope, then perform step S209;
S209: start described warning device, the turbidity transducer that prompting user cleans described turbidity transducer (2) or more renews.
7. detection method according to claim 4, is characterized in that: described step S2 comprises the following steps:
S303: described control unit (1) judges that the ratio of described turbidity voltage signal detected value and described turbidity voltage signal standard value is whether within the scope of described calibration deviate, if so, then performs step S304;
S304: open described alignment unit (3), described control unit (1) timing receives the turbidity voltage signal detected value after the calibration that described turbidity transducer (2) detects again;
S305: described control unit (1) judges that whether the ratio of the turbidity voltage signal detected value after calibrating and described turbidity voltage signal standard value is higher than described calibration deviate scope, if so, then performs step S306 again; If not, described step S304 is returned;
S306: close described alignment unit (3).
8. detection method according to claim 7, is characterized in that: described step S2 is further comprising the steps of:
In described step S303, if described control unit (1) judges that the ratio of described turbidity voltage signal detected value and described turbidity voltage signal standard value is lower than described calibration deviate scope, then perform step S309;
S309: start described warning device, the turbidity transducer that prompting user cleans described turbidity transducer (2) or more renews.
9. according to the arbitrary described detection method of claim 5-8, it is characterized in that: turbidity transducer (2) described in described control unit (1) timing receipt detect the turbidity voltage signal detected value of washings and described control unit (1) timing again receive the calibration that described turbidity transducer (2) detects after turbidity voltage signal detected value, be specially described control unit (1) and receive every 5-20s the turbidity voltage signal detected value that described turbidity transducer (2) detects.
10. a dish-washing machine, is characterized in that: described dish-washing machine can apply as arbitrary in claim 4-9 as described in detection method.
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