CN111220250A - Electronic scale, and scale pressing detection method and storage medium thereof - Google Patents
Electronic scale, and scale pressing detection method and storage medium thereof Download PDFInfo
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- CN111220250A CN111220250A CN202010247193.6A CN202010247193A CN111220250A CN 111220250 A CN111220250 A CN 111220250A CN 202010247193 A CN202010247193 A CN 202010247193A CN 111220250 A CN111220250 A CN 111220250A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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Abstract
The invention discloses an electronic scale, a weight detection method thereof and a storage medium, and belongs to the field of electronic scales. The electronic scale comprises a body, a main control module and at least one solar cell, wherein the solar cell is arranged on the weighing surface of the body and used for outputting an electric signal according to a received optical signal; the main control module is used for detecting the change of the electric signal output by the solar cell, determining the bearing state of the weighing surface according to the change of the electric signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface. According to the scheme, the solar cell arranged on the weighing surface is ingeniously reused, so that solar power supply is achieved, whether the pressure balance acts or not is detected by utilizing the characteristic that the solar cell is sensitive to the light intensity, the requirement on the lowest pressure balance weight of an object to be measured does not exist, the detection sensitivity of the pressure balance is improved, the user experience is improved, and meanwhile the system cost and the power consumption are reduced.
Description
Technical Field
The invention relates to the field of electronic scales, in particular to an electronic scale, a scale pressing detection method and a storage medium thereof.
Background
The pressure balance detection is also called weighing detection, and means that when a balance body is in a standby state, whether the balance body starts to bear a measured object is detected through a sensor, so that the balance body is awakened to measure the measured object. At present, an electronic scale mainly adopts a pressure sensor to carry out weighing detection, namely, the detected pressure is awakened when being larger than a weighing threshold value.
However, since the pressure-scale threshold is often much larger than the actual minimum measurement value, when the mass of the loaded object to be measured is smaller than the pressure-scale threshold, the electronic scale cannot be woken up from the standby state to work, and the pressure-scale is not sensitive to detection, which results in poor user experience.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an electronic scale, a method for detecting a scale, and a storage medium, so as to solve the technical problem that the detection of the scale by the electronic scale is not sensitive.
The technical scheme adopted by the invention for solving the technical problems is as follows:
according to an aspect of the present invention, there is provided an electronic scale including a body, a main control module and at least one solar cell, wherein:
the solar cell is arranged on the weighing surface of the body and used for outputting an electric signal according to the received optical signal;
the main control module is used for detecting the change of the electric signal output by the solar cell, determining the bearing state of the weighing surface according to the change of the electric signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface.
Preferably, the at least one solar cell is a plurality of solar cells, and the plurality of solar cells are arranged in an array or in a predetermined pattern.
Preferably, the solar cell is configured to output a current signal, a voltage signal or a power signal according to the received light signal.
Preferably, the at least one solar cell comprises a first solar cell arranged in a preset stepping area of the weighing surface and a second solar cell arranged in a preset non-stepping area; the main control module is specifically used for:
detecting the variation of a first electric signal output by a first solar cell and the variation of a second electric signal output by a second solar cell within a preset time;
and determining the bearing state of the weighing surface according to the difference between the variation of the first electric signal and the variation of the second electric signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface.
According to another aspect of the present invention, there is provided a method for detecting a weight scale, applied to the electronic scale, the method comprising:
detecting the change of an electric signal output by a solar cell arranged on a weighing surface of an electronic scale body;
and determining the loading state of the weighing surface according to the change of the electric signal, and adjusting the working state of the electronic scale according to the loading state of the weighing surface.
Preferably, the determining the load bearing state of the weighing surface according to the change of the electrical signal comprises:
detecting the variation of the electric signal output by the solar cell within a preset time;
determining the change rate of the electric signal according to the preset time length and the change quantity of the electric signal;
determining the bearing state of the weighing surface according to the change rate of the electric signals;
the change rate of the electrical signal is a change ratio or a change rate of a current value, a voltage value or a power value output by the solar cell within a preset time.
Preferably, the determining the load bearing state of the weighing surface according to the rate of change of the electrical signal comprises:
and when the change rate of the electric signal is within the preset loading change rate range, determining the bearing state of the weighing surface to be a loading state, otherwise, determining the bearing state of the weighing surface to be an unloaded state.
Preferably, the determining the load bearing state of the weighing surface according to the change of the electrical signal comprises:
detecting the variation of a first electric signal output by a first solar cell arranged in a preset trampling area of a weighing surface within a preset time and the variation of a second electric signal output by a second solar cell arranged in a preset non-trampling area;
and determining the bearing state of the weighing surface according to the difference between the variation of the first electric signal and the variation of the second electric signal.
Preferably, the adjusting the operating state of the electronic scale according to the loading state of the weight surface comprises:
when the load-bearing state of the weighing surface is determined to be a load state and the current working state of the electronic scale is a standby state, adjusting the working state of the electronic scale to be a running state;
and when the load bearing state of the weighing surface is determined to be an idle load state and the current working state of the electronic scale is determined to be a running state, adjusting the working state of the electronic scale to be a standby state.
According to yet another aspect of the present invention, there is provided an electronic scale comprising a memory, a processor, and a program stored on the memory and executable on the processor, the one or more programs when executed by the processor implementing the steps of the above-described pressure scale detection method.
According to yet another aspect of the present invention, there is provided a computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to perform the steps of the above-described press scale detection method.
According to the electronic scale, the pressure scale detection method and the storage medium provided by the invention, the solar cell is arranged on the weighing surface of the body, the solar cell outputs an electric signal according to the received optical signal, the main control module detects the change of the electric signal output by the solar cell, and the bearing state of the weighing surface is determined according to the change of the electric signal. The solar cell arranged on the weighing surface is ingeniously reused, solar power supply is achieved, the characteristic that the solar cell is sensitive to light intensity is used for detecting whether the pressure balance acts, the requirement on the lowest pressure balance weight of an object to be measured is avoided, the sensitivity of pressure balance detection is improved, and therefore user experience is improved while system cost and power consumption are reduced.
Drawings
Fig. 1 is a schematic structural diagram of an electronic scale according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an electronic scale according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electronic scale according to another embodiment of the present invention.
Fig. 4 is a flowchart of a method for detecting a pressure balance according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for detecting a pressure balance according to another embodiment of the present invention.
Fig. 6 is a flowchart of a method for detecting a pressure balance according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment, as shown in fig. 1, an electronic scale according to an embodiment of the present invention includes a body 10, a main control module 20, and at least one solar cell 30, wherein the main control module 20 and the solar cell 30 are electrically connected.
In this embodiment, the solar cell 30 is disposed on the weighing surface of the body 10, and outputs an electrical signal according to the received optical signal. The main control module 20 is configured to detect a change of an electrical signal output by the solar cell 30, determine a loading state of the weighing surface according to the change of the electrical signal, and adjust a working state of the electronic scale according to the loading state of the weighing surface.
In particular, the solar cell 30 may utilize photovoltaic materials to absorb light energy and convert it into electrical energy. The intensity of the electrical signal output by the solar cell 30 has a correlation with the intensity of the optical signal received by the solar cell. Specifically, when the received light signal of the ambient light is stronger, the electrical signal output by the solar cell 30 is stronger. The electrical signal output by the solar cell 30 may be at least one of a voltage value, a current value, or a power value.
Alternatively, only one solar cell 30 may be disposed on the weighing surface of the electronic scale body, or a plurality of solar cells 30 may be disposed on the weighing surface of the electronic scale body. When a plurality of solar cells 30 are provided, the plurality of solar cells 30 may be arranged in an array or in a predetermined pattern as needed.
Because the intensity of the electrical signal output by the solar cell 30 is in positive correlation with the intensity of the optical signal received by the solar cell, when a person steps on the weighing surface or the object to be measured is loaded on the weighing surface, the solar cell 30 is partially or completely shielded, the received optical signal is rapidly weakened, and the output electrical signal (voltage value, current value or power value) is also rapidly weakened accordingly. When a person or an object to be measured leaves the weighing surface, the intensity of the optical signal received by the solar cell 30 is restored to the ambient light intensity, and accordingly, the output electrical signal is also restored rapidly. Accordingly, the main control module 20 can detect the change of the electrical signal output by the solar cell 30, and further determine the bearing state of the weighing surface according to the change of the electrical signal. Specifically, when the electrical signal output by the solar cell 30 is decreased from large to small and then tends to be stable, it can be determined that the load-bearing state of the weighing surface is switched from the no-load state to the load-bearing state; on the contrary, when the electrical signal output by the solar cell 30 goes from small to large and then becomes stable, it can be determined that the load-bearing state of the weighing surface is switched from the load-bearing state to the no-load state.
The loading state of the weighing surface comprises a loading state and an idle state, the loading state refers to a state that a human body or an object to be measured is loaded on the weighing surface, and the idle state refers to a state that the human body and the object to be measured are not loaded on the weighing surface.
When the main control module 20 determines that the loading state of the weighing surface is switched from the loading state to the no-load state, and the current working state of the electronic scale is the running state, the working state of the electronic scale can be adjusted to the standby state, so that the power consumption of the electronic scale is saved. When the main control module 20 determines that the loading state of the weighing surface has been switched from the unloaded state to the loaded state, and the current working state of the electronic scale is in the standby state, the working state of the electronic scale may be adjusted to the running state, so as to wake up the electronic scale and start the measurement.
In this embodiment, the solar cell is used for detecting a bearing state of the weighing surface (i.e., detecting the weight scale), and is also used for supplying power to the electronic scale, so that the solar cell is maximally utilized. The solar cell that utilizes solar energy electronic scale itself to possess detects the pressure balance, and wireless additional setting is used for pressure sensor or photoelectric sensor that the pressure balance detected, also need not to carry out regularly scanning to the pressure sensor or photoelectric sensor of additional setting, consequently reducible system cost and consumption.
In the embodiment of the invention, the solar cell is arranged on the weighing surface of the body, the solar cell outputs an electric signal according to the received optical signal, and the main control module determines the bearing state of the weighing surface according to the change of the electric signal output by the solar cell. The solar cell arranged on the weighing surface is ingeniously reused, solar power supply is achieved, the characteristic that the solar cell is sensitive to light intensity is used for detecting whether the pressure balance acts, the requirement on the lowest pressure balance weight of an object to be measured is avoided, the sensitivity of pressure balance detection is improved, and therefore user experience is improved while system cost and power consumption are reduced.
In some embodiments, considering that the electronic scale determines that the electronic scale changes from the unloaded state to the loaded state or changes from the loaded state to the unloaded state, the variation of the electrical signal output by the solar cell 30 is related to the ambient light brightness of the environment where the electronic scale is located, and the variation is different or even may be greatly different under different environments. In addition, the change of the electrical signal may also be caused by the change of the environment, not necessarily caused by the change of the bearing state of the weighing surface, for example, the action of turning on and off the lamp in the night environment may cause the great change of the electrical signal. In order to avoid misjudgment, the main control module 20 detects the variation of the electrical signal output by the solar battery 30 within a preset time period; and determining the change rate of the electric signal according to the preset time length and the change amount of the electric signal, determining the bearing state of the weighing surface to be a loading state when the change rate of the electric signal is within a preset loading change rate range, and determining the bearing state of the weighing surface to be an unloaded state when the change rate of the electric signal is not within the preset loading change rate range.
The change rate of the electrical signal is a change ratio or a change rate of the electrical signal, such as a current value, a voltage value, or a power value, output by the solar cell 30 within a preset time period.
As an embodiment, when the change rate is the change ratio of the electric signal in the preset time period, the change of the loading state of the weighing surface due to the article/human body weighing scale is usually completed in a short time, and the preset time period may be a relatively short time range, for example, 0.5s-1min, in order to capture the change degree of the electric signal in the short time period. At this time, the preset load change rate range may be in the range of 15% to 100%. For example, when the intensity of the electric signal output from the solar cell 30 decreases by 50% within 30s, it can be determined that the load state of the weighing surface changes from the unloaded state to the loaded state.
As another embodiment, when the change rate is the change rate of the electrical signal within a preset time period, in order to identify a case where the ambient light changes slowly due to weather changes or changes in the placement position of the electronic scale, and the like, so as not to misjudge such a case as a change in the load bearing state of the weighing surface, the preset time period may be a relatively large time range, for example, 1min to 10 min. Therefore, the misjudgment of the detection of the pressure balance by the ambient light can be effectively avoided by judging the action of the pressure balance according to the relative value of the change rate (change ratio or change speed) of the electric signal.
In some embodiments, as shown in fig. 2, the number of the solar cells is at least two, that is, the electronic scale includes a body 10, a main control module 20, at least two solar cells (301 and 302), and a power module 40. The main control module 20, the at least two solar cells (301, 302) and the power module 40 are all electrically connected to each other.
Wherein, at least two solar cells (301, 302) are arranged on the weighing surface of the body 10, and are used for outputting a current signal, a voltage signal or a power signal according to the received optical signal, and outputting the current signal, the voltage signal or the power signal to the main control module 20 and the power module 40. The power module 40 is used for performing power conversion on the input electrical signals of the at least two solar cells (301, 302) and providing power for the main control module 20 and other modules.
In this embodiment, the first solar cell 301 includes at least one preset stepping area disposed on the weighing surface, and at least one second solar cell 302 disposed on a preset non-stepping area (for example, disposed at any at least one of four corners of the weighing surface), so that when a person steps on the weighing surface or a measured object loads the weighing surface, the first solar cell 301 is shielded by the preset stepping area, and thus the output first electrical signal is greatly changed, specifically, greatly attenuated; the second solar cell 302 is not shielded due to the predetermined non-treading area, so that the output second electrical signal is not changed significantly, i.e. the variation of the second electrical signal is small. At this time, the main control module 20 detects that the variation of the first electrical signal output by the first solar cell 301 is large, and the variation of the second electrical signal output by the second solar cell 302 is small. The main control module 20 can determine the bearing state of the weighing surface according to the difference between the variation of the first electrical signal and the variation of the second electrical signal. Because the variation value caused by the change of the environmental light is already offset in the difference value of the variation of the first electrical signal and the variation of the second electrical signal, when the variation difference is greater than a preset variation difference threshold, the bearing state of the weighing surface can be determined to be a loading state, and when the variation difference is less than the variation difference threshold, the bearing state of the weighing surface can be determined to be an unloaded state. The variation difference may be a difference between variation amounts of the first electrical signal and the second electrical signal, or a difference between a variation rate of the first electrical signal and a variation rate of the second electrical signal. Accordingly, the change difference threshold may be a difference threshold of the amount of change or a difference threshold of the rate of change.
When the main control module 20 determines that the load-bearing state of the weighing surface is switched to the no-load state and the current working state of the electronic scale is the running state, the working state of the electronic scale can be adjusted to the standby state, so that the power consumption of the electronic scale is saved. When the main control module 20 determines that the load-bearing state of the weighing surface is switched to the load-bearing state and the current working state of the electronic scale is the standby state, the working state of the electronic scale can be adjusted to the running state, so as to wake up the electronic scale and start the measurement.
In other preferred embodiments, considering an electronic scale using a single-panel solar cell for power supply, when the solar cell panel is shielded, the solar cell may fail to output or output insufficient power, and the scale body loses power and cannot work normally. Solar cell can adopt solar cell array to realize, tramples weighing surface or testee like this when the face of weighing that loads, and only partly solar cell panel is sheltered from and is used for the ballast to detect, and another part solar cell continues to carry out the power conversion and supplies power for the electronic scale to can ensure power supply, can realize the ballast again and detect.
In some embodiments, the second solar cell 302 disposed at the predetermined non-tread region may be replaced with a photosensitive element. Alternatively, the light sensitive element may be a photo resistor, a photo diode, a photo triode, a photo fet, or a photo thyristor. Taking the photo-resistor as an example, the resistance of the photo-resistor decreases as the intensity of light increases. Under the condition that the given voltage is unchanged, the stronger the illumination is, the larger the current flowing through the photoresistor is, namely, the current signal output by the photoresistor is positively correlated with the intensity of the light signal received by the photoresistor. Therefore, the light intensity change of the non-treading area can be determined by the photosensitive element, and the bearing state of the weighing surface can be judged in an auxiliary manner.
In other embodiments, as shown in fig. 3, at least two photosensitive elements 50 may be disposed on the weighing surface, including at least one first photosensitive element 501 disposed on a predetermined tread area of the weighing surface, and at least one second photosensitive element 502 disposed on a predetermined non-tread area (e.g., disposed at any at least one of four corners of the weighing surface). Thus, when a person steps on the weighing surface or the object to be weighed loads the weighing surface, the first photosensor 501 is shielded due to being in the preset stepping area, the second photosensor 502 is not shielded due to being in the preset non-stepping area, the variation of the first electrical signal output by the first photosensor 502 detected by the main control module 20 is larger, and the variation of the second electrical signal output by the second photosensor 502 is smaller. The main control module 20 can determine the bearing state of the weighing surface according to the difference between the variation of the first electrical signal and the variation of the second electrical signal. Because the variation value caused by the change of the environmental light is already offset in the difference value of the variation of the first electrical signal and the variation of the second electrical signal, when the variation difference is greater than a preset variation difference threshold, the bearing state of the weighing surface can be determined to be a loading state, and when the variation difference is less than the variation difference threshold, the bearing state of the weighing surface can be determined to be an unloaded state. The variation difference may be a difference between variation amounts of the first electrical signal and the second electrical signal, or a difference between a variation rate of the first electrical signal and a variation rate of the second electrical signal. Accordingly, the change difference threshold may be a difference threshold of the amount of change or a difference threshold of the rate of change.
In the embodiment of the invention, the pressure balance detection is further carried out by the first photosensitive element arranged in the preset treading area and the second photosensitive element arranged in the preset non-treading area, so that the influence of ambient light on the pressure balance detection is effectively avoided, and the accuracy of the pressure balance detection is ensured.
In one embodiment, the present invention further provides a method for detecting a pressure balance, as shown in fig. 4, the method comprising:
s101, detecting the change of an electric signal output by a solar cell arranged on a weighing surface of the electronic scale body.
Specifically, the intensity of the electrical signal output by the solar cell is correlated with the intensity of the optical signal received by the solar cell, and the correlation may be positive or negative. Taking the positive correlation as an example, when the received light signal of the ambient light is stronger, the electrical signal output by the solar cell is stronger. Wherein, the electrical signal output by the solar cell may be at least one of a voltage value, a current value or a power value.
Optionally, only one solar cell may be disposed on the weighing surface of the electronic scale body, or a plurality of solar cells may be disposed on the weighing surface of the electronic scale body. When a plurality of solar cells are provided, the plurality of solar cells may be arranged in an array or in a predetermined pattern as necessary. Taking the strength of the electrical signal output by the solar cell and the strength of the optical signal received by the solar cell as an example, when someone steps on the weighing surface or the weighing surface is loaded with the object to be measured, the sensing element is partially or completely blocked, the optical signal received by the sensing element is rapidly weakened, and the output electrical signal (voltage value, current value or power value) is also rapidly weakened accordingly. When the person or the measured object leaves the weighing surface, the intensity of the optical signal received by the sensing element is recovered to the intensity of the ambient light, and correspondingly, the output electric signal is also recovered rapidly. Accordingly, a change in the electric signal output from the solar cell can be detected.
And S102, determining the bearing state of the weighing surface according to the change of the electric signal.
Specifically, the bearing state of the weighing surface includes a loading state and an unloading state, the loading state refers to a state in which a human body or an object to be measured is loaded on the weighing surface, and the unloading state refers to a state in which the human body and the object to be measured are not loaded on the weighing surface.
Still taking the strength of the electrical signal output by the solar cell and the strength of the optical signal received by the solar cell as a positive correlation, when the change rule of the electrical signal output by the solar cell is from large to small and then tends to be stable, the bearing state of the weighing surface can be judged to be a loading state; on the contrary, when the change rule of the electric signal output by the solar cell is from small to large and then tends to be stable, the bearing state of the weighing surface can be judged to be the no-load state.
And S103, adjusting the working state of the electronic scale according to the loading state of the weight surface.
Specifically, when it is determined that the load bearing state of the weighing surface is an idle state and the current working state of the electronic scale is an operating state, the working state of the electronic scale can be adjusted to a standby state, so that the power consumption of the electronic scale is saved. When the load bearing state of the weighing surface is determined to be the load state and the current working state of the electronic scale is the standby state, the working state of the electronic scale can be adjusted to be the running state, so that the electronic scale is awakened and the measurement is started.
The method of the embodiment of the invention determines the bearing state of the weighing surface by detecting the change of the electric signal output by the solar cell, has no requirement on the lowest weighing weight of the object to be measured because the shading principle is adopted to detect whether the weighing scale acts, can immediately and effectively determine the bearing state of the weighing surface, and adjusts the working state of the electronic scale according to the bearing state of the weighing surface.
In some embodiments, considering that the electronic scale determines that the electronic scale changes from the unloaded state to the loaded state or changes from the loaded state to the unloaded state, the variation of the electrical signal output by the solar cell is related to the ambient light brightness of the environment where the electronic scale is located, and the variation is different or even may be greatly different under different environments. For example, under normal conditions, the outdoor illuminance on a fine day is between 3 and 30 Mulus, and the indoor illuminance on a fine day is only 100 to 1000 Mulus; the illuminance outside the cloudy day is 50-500 lux, and the illuminance inside the cloudy day is only 5-50 lux. Considering that the intensity difference of optical signals is large under different environments, the difference of electrical signals output by the solar cell is also large, for example, the outdoor illuminance is about 300 times more than that of the indoor environment in a sunny day, and when the electronic scale is placed outdoors and indoors, the variation difference of the electrical signals caused by the change of the bearing state of the electronic scale is about 300 times. Even in cloudy days, when the electronic scale is placed outdoors or indoors, the difference in the amount of change in the electric signal due to the change in the load state is about 10 times. In addition, the change of the electrical signal may also be caused by the change of the environment, not necessarily caused by the change of the bearing state of the weighing surface, for example, the action of turning on and off the lamp in the night environment may also cause the great change of the electrical signal. If the absolute value of the variation of the electric signal is adopted to judge whether the action of the weighing scale is inaccurate. In order to avoid the misjudgment of the pressure balance, the relative value of the change rate of the electric signal can be used for judging. And determining the change rate of the electric signal according to the preset time length and the change amount of the electric signal, determining the bearing state of the weighing surface to be a loading state when the change rate of the electric signal is within a preset loading change rate range, and determining the bearing state of the weighing surface to be an unloaded state when the change rate of the electric signal is not within the preset loading change rate range.
As shown in fig. 5, a method for detecting a pressure balance according to an embodiment of the present invention includes:
s201, detecting the variation of an electric signal output by a solar cell arranged on a weighing surface of the electronic scale body in a preset time.
S202, determining the change rate of the electric signal according to the preset time length and the change quantity of the electric signal.
The change rate of the electrical signal is the change proportion or the change rate of the electrical signal such as the current value, the voltage value or the power value output by the solar cell within the preset time length.
Taking the electrical signal output by the solar cell as the voltage signal as an example, if the voltage value output by the solar cell at the time t1 is V1, and the voltage value output by the solar cell at the time t2 is V2, the output voltage value change rate can be calculated as follows: V2-V1/V1(t2-t 1). Obviously, t2-t1 should be correlated with the time length of the operation of the pressure balance, t2-t1 is too long, no practical reference is made to the detection of the pressure balance, and a proper t2-t1 can be defined as a preset time length. Therefore, whether the pressure balance acts or not is judged according to the relative value of the change rate (the change proportion and the change rate in the preset time length) of the intensity (corresponding to the magnitude of the output electric signal) of the optical signal, and the influence of the ambient light can be eliminated.
S203, judging that the change rate of the electric signal is in a preset loading change rate range, if so, executing a step S204, otherwise, turning to the step S207.
And S204, determining the bearing state of the weighing surface as a loading state.
S205, judging whether the current state is a standby state, if so, executing the step S206, otherwise, returning to the step S201.
S206, adjusting the working state of the electronic scale to be the running state, and returning to the step S201.
And S207, determining the bearing state of the weighing surface to be an unloaded state.
And S208, judging whether the current state is the running state, if so, executing the step S209, otherwise, returning to the step S201.
S209, adjusting the working state of the electronic scale to a standby state.
In this embodiment, when the change rate is the change ratio of the electrical signal within the preset time period, the change of the load-bearing state of the weighing surface due to the article/human body weighing scale is usually completed within a short time period, and the preset time period may be a relatively short time range, for example, 0.5s-1min, in order to capture the change degree of the electrical signal within the short time period. At this time, the preset load change rate range may be in the range of 15% to 100%. For example, when the intensity of the electric signal output from the solar cell 30 decreases by 50% within 30s, it can be determined that the load state of the weighing surface changes from the unloaded state to the loaded state.
In this embodiment, when the change rate is the change rate of the electrical signal within the preset time period, in order to identify the condition that the ambient light changes slowly due to weather changes or changes in the placement position of the electronic scale, and so on, so as to avoid misjudging such condition as a change in the load bearing state of the weighing surface, the preset time period may be a relatively large time range, for example, 1min to 10 min. Therefore, the misjudgment of the detection of the pressure balance by the ambient light can be effectively avoided by judging the action of the pressure balance according to the relative value of the change rate of the electric signal.
In some embodiments, the present invention further provides a method for detecting a pressure balance, as shown in fig. 6, the method comprising:
s301, detecting the variation of a first electric signal output by a first solar cell arranged in a preset trampling area of a weighing surface in a preset time length and the variation of a second electric signal output by a second solar cell arranged in a preset non-trampling area.
Specifically, in order to better avoid misjudgment of the detection of the pressure balance, the number of the solar cells is set to be at least two, including at least one first solar cell arranged in a preset stepping area of the weighing surface and at least one second solar cell arranged in a preset non-stepping area (for example, arranged in any at least one of four corners of the weighing surface). Therefore, when a person treads a weighing surface or a measured object loads the weighing surface, the first solar cell is shielded due to the fact that the first solar cell is in the preset treading area, the second solar cell is not shielded due to the fact that the second solar cell is in the preset non-treading area, the variation of the first electric signal output by the first solar cell detected mainly is large, and the variation of the second electric signal output by the second solar cell is small.
S302, determining the bearing state of the weighing surface according to the variation of the first electric signal and the difference of the variation of the second electric signal.
Specifically, since the variation value caused by the ambient light variation has been offset from the difference between the variation of the first electrical signal and the variation of the second electrical signal, when the variation difference is greater than the preset variation difference threshold, the bearing state of the weighing surface can be determined to be the loading state, and when the variation difference is less than the variation difference threshold, the bearing state of the weighing surface can be determined to be the no-load state. The variation difference may be a difference between variation amounts of the first electrical signal and the second electrical signal, or a difference between a variation rate of the first electrical signal and a variation rate of the second electrical signal. Accordingly, the change difference threshold may be a difference threshold of the amount of change or a difference threshold of the rate of change.
And S303, adjusting the working state of the electronic scale according to the loading state of the weight surface.
Specifically, when it is determined that the load bearing state of the weighing surface is an idle state and the current working state of the electronic scale is an operating state, the working state of the electronic scale can be adjusted to a standby state, so that the power consumption of the electronic scale is saved. When the load bearing state of the weighing surface is determined to be the load state and the current working state of the electronic scale is the standby state, the working state of the electronic scale can be adjusted to be the running state, so that the electronic scale is awakened and the measurement is started. In the embodiment of the invention, the bearing state of the weighing surface is confirmed by the difference between the variation of the first electric signal output by the first solar cell arranged in the preset trampling area and the variation of the second electric signal output by the second solar cell arranged in the preset non-trampling area, so that the influence of ambient light on the detection of the pressure balance is effectively eliminated, and the accuracy of the detection of the pressure balance is ensured.
In addition, an embodiment of the present invention further provides an electronic scale, where the electronic scale includes a memory, a processor, and a program stored in the memory and executable on the processor, and when the program or programs are executed by the processor, the steps of the above-mentioned method for detecting a scale are implemented.
It should be noted that the electronic scale provided in the embodiment of the present invention belongs to the same technical concept as the embodiment of the pressure scale detection method, and specific implementation processes thereof are described in detail in the embodiment of the method, and technical features in the embodiment of the method are all correspondingly applicable in the embodiment, which is not described herein again.
In addition, the embodiment of the present invention further provides a computer-readable storage medium, where one or more computer programs are stored, and the one or more computer programs can be executed by one or more processors to implement the steps of the above-mentioned pressure balance detection method.
It should be noted that, in the computer-readable storage medium provided in the embodiment of the present invention, the computer program and the embodiment of the pressure balance detection method belong to the same technical concept, and specific implementation processes thereof are detailed in the embodiment of the method, and technical features in the embodiment of the method are applicable in this embodiment, which is not described herein again.
According to the electronic scale, the pressure scale detection method and the storage medium provided by the invention, the solar cell is arranged on the weighing surface of the body, the solar cell outputs an electric signal according to the received optical signal, the main control module detects the change of the electric signal output by the solar cell, and the bearing state of the weighing surface is determined according to the change of the electric signal. Because the shading principle is adopted to detect whether the pressure balance acts or not, the balance body system is started to measure, the lowest pressure balance weight of the measured object is not required, the detection sensitivity of the pressure balance is improved, and the user experience is improved.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by controlling the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.
Claims (11)
1. The utility model provides an electronic scale, includes the body, its characterized in that still includes main control module and at least one solar cell, wherein:
the solar cell is arranged on the weighing surface of the body and used for outputting an electric signal according to the received optical signal;
the main control module is used for detecting the change of the electric signal output by the solar cell, determining the bearing state of the weighing surface according to the change of the electric signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface.
2. The electronic scale according to claim 1, wherein the at least one solar cell is plural, and the plural solar cells are arranged in an array or in a predetermined pattern.
3. The electronic scale according to claim 1, wherein the solar cell is configured to output a current signal, a voltage signal, or a power signal based on the received light signal.
4. The electronic scale according to any one of claims 1-3, wherein the at least one solar cell includes a first solar cell disposed in a predetermined stepping area of the weighing surface and a solar cell disposed in a predetermined non-stepping area; the main control module is specifically configured to:
detecting the variation of a first electric signal output by the first solar cell and the variation of a second electric signal output by the second solar cell within a preset time period;
and determining the bearing state of the weighing surface according to the variation of the first electrical signal and the variation of the second electrical signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface.
5. A method for detecting a weight scale, applied to the electronic scale according to any one of claims 1 to 4, comprising:
detecting the change of an electric signal output by a solar cell arranged on a weighing surface of the electronic scale body;
and determining the bearing state of the weighing surface according to the change of the electric signal, and adjusting the working state of the electronic scale according to the bearing state of the weighing surface.
6. The method for detecting a weighing scale according to claim 5, wherein the detecting a change in an electrical signal output from a solar cell provided on a weighing surface of the electronic scale body, and determining a load state of the weighing surface based on the change in the electrical signal includes:
detecting the variation of the electric signal output by the solar cell within a preset time;
determining the change rate of the electric signal according to the preset time and the change quantity of the electric signal;
determining the bearing state of the weighing surface according to the change rate of the electric signal;
the change rate of the electric signal is the change ratio or the change rate of the current value, the voltage value or the power value output by the solar cell within the preset time length.
7. The method according to claim 6, wherein determining the load bearing status of the weighing surface according to the rate of change of the electrical signal comprises:
and when the change rate of the electric signal is within a preset loading change rate range, determining that the bearing state of the weighing surface is a loading state, otherwise, determining that the bearing state of the weighing surface is an unloaded state.
8. The method for detecting a weighing scale according to claim 6, wherein the detecting a change in an electrical signal output from a solar cell provided on a weighing surface of the electronic scale body, and determining a load state of the weighing surface based on the change in the electrical signal includes:
detecting the variation of a first electric signal output by a first solar cell arranged in a preset treading area of the weighing surface in a preset time and the variation of a second electric signal output by a second solar cell arranged in a preset non-treading area;
and determining the bearing state of the weighing surface according to the difference between the variation of the first electric signal and the variation of the second electric signal.
9. The method for testing a weighing scale according to any one of claims 5-8, wherein adjusting the operating status of the weighing scale according to the loading status of the weighing surface comprises:
when the load-bearing state of the weighing surface is determined to be a load state and the current working state of the electronic scale is a standby state, adjusting the working state of the electronic scale to be a running state;
and when the load bearing state of the weighing surface is determined to be an idle load state and the current working state of the electronic scale is determined to be a running state, adjusting the working state of the electronic scale to be a standby state.
10. An electronic scale comprising a memory, a processor, and one or more programs stored on the memory and executable on the processor, wherein the one or more programs when executed by the processor implement the steps of the pressure scale detection method of any one of claims 5-9.
11. A computer readable storage medium, having one or more programs stored thereon, the one or more programs being executable by one or more processors to perform the steps of the method of any one of claims 5-9.
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