Sensor system capable of improving sampling precision and refrigerator

Abstract

The invention discloses a sensor system capable of improving sampling precision and a refrigerator, the sensor system capable of improving the sampling precision comprises a plurality of sensors capable of jointly collecting the same to-be-measured parameter, the sampling precision of all the sensors is the same, and the sampling ranges of all the sensors are different from one another. The sampling range of at least one sensor is within the sampling range of the other sensor, and the sensor system is matched with the range of to-be-measured parameters to select the sensor with the corresponding sampling range for acquisition. Compared with the prior art, on the basis that the sampling cost is not increased, the sampling precision can be improved, and the technical problem caused by too large sampling errors is avoided.

Description

Technical Field

[0001] This invention relates to the field of refrigeration temperature control, and in particular to a sensor system and refrigerator that improves sampling accuracy. Background Technology

[0002] The temperature sensor used in the refrigerator is a universal type, meaning that the same sensor is used in both the refrigerator and freezer compartments. The resistance range is 0~120K, corresponding to a temperature of -50℃~70℃. The disadvantage of this type of sensor is that the acquisition accuracy is relatively low. The temperature range of the refrigerator compartment is 2℃~8℃, and the temperature range of the freezer compartment is -16℃~-33℃. The temperature difference between the two compartments is too large, and using the same temperature sensor will result in a large temperature difference.

[0003] Because sensors with a wide measurement range require more data to be written, while software memory is limited, the software can only read and transmit temperature changes to corresponding values. Currently, the temperature collected by the software differs from the actual temperature by about 0.5℃. If a high-precision temperature sensor is used, the cost will be about 10 times higher than that of existing sensors (about 1 yuan for a regular sensor and about 10 yuan for a high-precision sensor), making widespread adoption impossible. The refrigerator compartment has the highest temperature accuracy requirements; if the temperature is too low, fruits and vegetables risk freezing, and if the temperature is too high, meat in the refrigerator compartment risks spoilage. Therefore, precise temperature control is needed to optimize the storage function of the refrigerator compartment.

[0004] Therefore, how to improve the accuracy of temperature acquisition without using high-precision sensors is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] To address the problem of large sampling errors in critical temperature ranges inside refrigerators using ordinary sensors in existing technologies, this invention proposes a sensor system and refrigerator with improved sampling accuracy.

[0006] The technical solution of the present invention is to propose a sensor system for improving sampling accuracy, comprising multiple sensors that can jointly acquire the same parameter to be measured, all of which have the same sampling accuracy and different sampling ranges, and at least one of which has a sampling range within the sampling range of another sensor. The sensor system selects a sensor with a corresponding sampling range to acquire the parameter to be measured within the range of the parameter to be measured.

[0007] Furthermore, the sensor system includes a first sensor and a second sensor, and the second sampling range corresponding to the second sensor is greater than the first sampling range corresponding to the first sensor;

[0008] When the first sensor and the second sensor collect the same parameter to be measured, the first sampling range of the first sensor for the parameter to be measured is within the second sampling range of the second sensor for the parameter to be measured.

[0009] Furthermore, when the parameter to be measured is within the first sampling range, the sensor system uses the first sensor for sampling and the second sensor for auxiliary verification.

[0010] When the parameter to be measured is within the second sampling range and outside the first sampling range, the sensor system uses the second sensor for sampling.

[0011] Furthermore, the parameter to be measured is a temperature parameter, and the first sensor has a first sampling range of (2℃, 8℃) for the temperature parameter, and the second sensor has a second sampling range of (-10℃, 15℃) for the temperature parameter.

[0012] Furthermore, both the first sensor and the second sensor use an 8-bit machine to write the parameters to be measured.

[0013] Furthermore, the sensor system includes a third sensor, a fourth sensor, and a fifth sensor, and the fourth sampling range corresponding to the fourth sensor is greater than the third sampling range corresponding to the third sensor, and the fifth sampling range corresponding to the fifth sensor is greater than the fourth sampling range corresponding to the fourth sensor.

[0014] When the third sensor, the fourth sensor, and the fifth sensor collect the same parameter to be measured, the third sampling range of the third sensor for the parameter to be measured is within the fourth sampling range of the fourth sensor for the parameter to be measured, and the fourth sampling range of the fourth sensor for the parameter to be measured is within the fifth sampling range of the fifth sensor for the parameter to be measured.

[0015] Furthermore, when the parameter to be measured is within the third sampling range, the sensor system uses the third sensor for sampling and uses the fourth and fifth sensors for auxiliary verification.

[0016] When the parameter to be measured is in the fourth sampling range and outside the third sampling range, the sensor system uses the fourth sensor for sampling and the fifth sensor for auxiliary verification.

[0017] When the parameter to be measured is within the fifth sampling range and outside the fourth sampling range, the sensor system uses the fifth sensor for sampling.

[0018] Furthermore, the parameter to be measured is a temperature parameter, the third sensor has a third sampling range of (2℃, 8℃) for the temperature parameter, the fourth sensor has a fourth sampling range of (-10℃, 20℃) for the temperature parameter, and the fifth sensor has a fifth sampling range of (-50℃, 70℃) for the temperature parameter.

[0019] Furthermore, the third, fourth, and fifth sensors all use an 8-bit machine to write the parameters to be measured.

[0020] The present invention also proposes a refrigerator having a sensor system for collecting the temperature of the refrigerator compartment and the freezer compartment, the sensor system employing the aforementioned sensor system.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] 1. This invention improves the accuracy of temperature acquisition by combining a wide-range ordinary sensor and a narrow-range ordinary sensor, while eliminating the need for a high-precision sensor and avoiding increased acquisition costs.

[0023] 2. The present invention can also set three sensors with different ranges to set different sampling accuracies for different temperature ranges, thereby realizing a more refined temperature monitoring strategy and adapting to complex refrigeration systems. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the sensor data acquisition selected in the first embodiment of the present invention;

[0026] Figure 2 This is a flowchart illustrating a specific implementation of the present invention in its first embodiment;

[0027] Figure 3 This is a schematic diagram of the sensor used for data acquisition in the second embodiment of the present invention;

[0028] Figure 4 This is a flowchart illustrating a specific implementation of the present invention in its second embodiment. Detailed Implementation

[0029] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be 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 present invention and are not intended to limit the present invention.

[0030] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0031] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Currently, refrigerators use general-purpose sensors (i.e., wide-range ordinary sensors) with relatively low data acquisition accuracy. The temperature range of the refrigerator compartment is 2℃~8℃, while the temperature range of the freezer compartment is -16℃~-33℃. The temperature difference between the two compartments is significant. When using the same sensor to collect temperature data in the refrigerator compartment, the collected temperature, after software processing, will differ from the actual temperature by about 0.5℃. This relatively large error may affect the refrigerator's temperature control. While using high-precision sensors for temperature sampling could improve accuracy, it would greatly increase the cost of data acquisition.

[0033] To address the aforementioned problems, the design concept of this invention is to use two ordinary sensors for joint data acquisition. One sensor is a wide-range sensor, and the other is a narrow-range sensor. The range of the narrow-range sensor is precisely matched with the temperature range of the refrigerator compartment. When acquiring temperature data for the refrigerator compartment, using the narrow-range sensor can improve sampling accuracy.

[0034] Based on the above design concept, the sensor system for improving sampling accuracy proposed in this invention includes multiple sensors that can jointly acquire the same parameter to be measured;

[0035] All sensors have the same sampling accuracy, and all sensors have different sampling ranges. At least one sensor's sampling range is within the sampling range of another sensor. The sensor system selects the sensor with the corresponding sampling range to collect data for the range of the parameter to be measured.

[0036] Through this design, the present invention can achieve the beneficial effects described above:

[0037] By improving the accuracy of temperature acquisition and eliminating the use of high-precision sensors, the cost of data acquisition was avoided.

[0038] Here, the sampling accuracy corresponds to the number of bits written by the sensor. The sensors in the solution provided in this invention all have a writing bit of 256 bits, that is, they are written by an 8-bit machine, which falls into the category of low-cost ordinary sensors.

[0039] For high-precision sensors, the number of bits written to the sensor may reach 512 bits or even 1024 bits. This allows for more bits to be written to the same temperature range, thereby achieving higher precision sampling. However, a higher number of bits will lead to higher costs.

[0040] This invention achieves higher accuracy by using multiple 8-bit sensors for joint sampling. For example, when used in a refrigerator, if the internal temperature needs to be collected, the temperature range is -50℃ to 70℃. Writing this data to an 8-bit sensor can result in significant errors when collecting the temperature inside the refrigerator compartment (range 2℃ to 8℃). This invention combines this with a narrow-range sensor (whose range corresponds exactly to the temperature range of 2℃ to 8℃) for joint sampling. The sampling accuracy remains the same, and the data is still written to an 8-bit sensor, but the temperature range corresponding to each bit is smaller, thus improving the sampling accuracy.

[0041] This invention provides two embodiments for achieving high-precision sampling within a temperature range of 2℃ to 8℃, and for setting different sampling accuracies for different temperature ranges. For the first embodiment, the solution is as follows:

[0042] The sensor system includes a first sensor and a second sensor, and the second sampling range corresponding to the second sensor is greater than the first sampling range corresponding to the first sensor.

[0043] When the first sensor and the second sensor collect the same parameter to be measured, the first sampling range of the parameter to be measured by the first sensor is located within the second sampling range of the parameter to be measured by the second sensor.

[0044] The parameter to be measured is a temperature parameter. The first sampling range of the first sensor for the temperature parameter is (2℃, 8℃), and the second sampling range of the second sensor for the temperature parameter is (-10℃, 15℃).

[0045] Both the first and second sensors mentioned above use an 8-bit machine to write the parameters to be measured;

[0046] The following example illustrates the method for improving data acquisition accuracy:

[0047] Assuming the original wide-range second sensor for data acquisition has a resistance range of 0-120kΩ, and it is written using an 8-bit machine with 256 bits, the corresponding resistance range within a temperature range of 2℃~8℃ is 4.3-5.8kΩ, as shown in the table below:

[0048] Temperature (°C) Resistance value (kΩ) 2 5.873 2.5 5.728 3 5.587 3.5 5.45 4 5.315 4.5 5.186 5 5.06 5.5 4.937 6 4.818 6.5 4.702 7 4.589 7.5 4.479 8 4.372

[0049] That is, for the wide-range second sensor, its resistance change is 5.8-4.3=1.5kΩ within the temperature range of 2℃~8℃. Since the resistance range of the second sensor is 0-120kΩ, its corresponding bit depth is 256 bits. Therefore, when the wide-range second sensor is used to collect data in the temperature range of 2℃~8℃, the corresponding bit depth is only 256 / 120*1.5=3.2 bits.

[0050] By shortening the measurement range to 2℃~8℃ and then using the same 256-bit first sensor for writing, the resistance value corresponding to the temperature range of 2℃~8℃ can be written in 256 bits. Compared with the original 3.2 bits, the data acquisition space is increased, which can improve the sampling accuracy.

[0051] For the original wide-range second sensor, its sampling accuracy is 0.5℃ (i.e., each bit is written as 0.5℃). The range of 2-8℃ is divided into 12 0.5℃, so each 0.5℃ is about 125Ω, that is, each bit is 125Ω.

[0052] For the narrow-range first sensor, its resistance change is 1.5kΩ and the number of bits written is 256, so each bit is approximately (5.8-4.3)kΩ / 256≈5.8Ω;

[0053] Let the sampling accuracy of the narrow-range first sensor be X, which satisfies the following relationship:

[0054] 125 / 0.5 = 5.8 / X;

[0055] X = 0.023;

[0056] That is, by using a single sensor with a narrow temperature range of 2℃ to 8℃ to collect data, the acquisition accuracy can reach 0.023℃, which is about 20 times higher than the previous 0.5℃.

[0057] That is, based on the technical solution of the first embodiment above, when the present invention collects data for a temperature range of 2℃ to 8℃, it can improve the sampling accuracy by about 20 times by using the first sensor, which can well adapt to the temperature monitoring in the refrigerator compartment. The second sensor is used to collect temperature data outside the first sampling range, so as to realize wide-range temperature monitoring.

[0058] In this first embodiment, a total of two sensors are used, namely the first sensor and the second sensor. Please refer to [link to relevant documentation]. Figure 1 The logic for selecting a sensor for sampling is as follows:

[0059] Start sampling;

[0060] Is the parameter to be measured within the first sampling range?

[0061] If so, the first sensor is used for sampling, and the second sensor is used for auxiliary verification;

[0062] If not, then a second sensor will be used for sampling;

[0063] This is because, although the sampling accuracy of the measured parameter within the first sampling range can be greatly improved by setting the first sensor (narrow-range sensor), its sampling range limitation means that it can only collect the measured parameter within the first sampling range. Therefore, when the measured parameter is within the first sampling range, it can be sampled by the first sensor to improve the sampling accuracy, and the second sensor can be used for auxiliary verification to determine whether the first sensor is faulty and ensure the reliability of the sampled data.

[0064] When the parameter to be measured is within the second sampling range but outside the first sampling range, a second sensor is required for sampling to ensure a wide range of temperature sampling.

[0065] Figure 2 To implement the specific process of this first embodiment, the sensor and controller are first initialized, and then the first sensor is set to a first sampling range (2℃, 8℃).

[0066] Set the second sensor: second sampling range (-10℃, 15℃);

[0067] Set thresholds: Tlow=2℃, Thigh=8℃;

[0068] Then, the temperature values ​​are read through the first sensor and the second sensor respectively to obtain temperature values ​​T1 and T2;

[0069] Determine whether T1 and T2 are within the first sampling range (2℃, 8℃);

[0070] If so, the first sensor will be used as the primary data acquisition source for high-precision data processing, and the second sensor will be used as an auxiliary reference.

[0071] If not, the second sensor will be enabled as the primary data acquisition source for temperature monitoring and control, and will continue to read data in standby mode.

[0072] Finally, the processed temperature value (T1 or T2) is sent to the refrigerator's display module / control system for precise temperature control.

[0073] The above is a specific solution of the first embodiment of the present invention. As can be seen from the above settings, when a wide range of temperature acquisition is required, it can be acquired by the second sensor. When a high-precision temperature acquisition is required within a narrow range, it can be acquired by the first sensor. Furthermore, in the process of implementing the above solution, there is no need to set up a high-precision sensor, which reduces the design cost.

[0074] For Example 2, the solution is as follows:

[0075] The sensor system includes a third sensor, a fourth sensor, and a fifth sensor, and the fourth sampling range corresponding to the fourth sensor is greater than the third sampling range corresponding to the third sensor, and the fifth sampling range corresponding to the fifth sensor is greater than the fourth sampling range corresponding to the fourth sensor.

[0076] When the third, fourth, and fifth sensors collect the same parameter to be measured, the third sampling range of the parameter to be measured by the third sensor is within the fourth sampling range of the parameter to be measured by the fourth sensor, and the fourth sampling range of the parameter to be measured by the fourth sensor is within the fifth sampling range of the parameter to be measured by the fifth sensor.

[0077] The parameter to be measured is the temperature parameter. The third sampling range of the third sensor for the temperature parameter is (2℃, 8℃), the fourth sampling range of the fourth sensor for the temperature parameter is (-10℃, 20℃), and the fifth sampling range of the fifth sensor for the temperature parameter is (-50℃, 70℃).

[0078] The third, fourth, and fifth sensors all use an 8-bit machine to write the parameters to be measured.

[0079] The following example illustrates the method for improving data acquisition accuracy:

[0080] Assuming the original wide-range fifth sensor used for data acquisition has a resistance range of 0-120kΩ, and the data is written using an 8-bit machine with 256 bits, the corresponding resistance range within a temperature range of 2℃~8℃ is 4.3-5.8kΩ, as shown in the table below:

[0081] Temperature (°C) Resistance value (kΩ) 2 5.873 2.5 5.728 3 5.587 3.5 5.45 4 5.315 4.5 5.186 5 5.06 5.5 4.937 6 4.818 6.5 4.702 7 4.589 7.5 4.479 8 4.372

[0082] That is, for the wide-range fifth sensor, its resistance change is 5.8-4.3=1.5kΩ within the temperature range of 2℃~8℃. Since the resistance range of the fifth sensor is 0-120kΩ, its corresponding bit depth is 256 bits. Therefore, when the wide-range fifth sensor is used to collect data in the temperature range of 2℃~8℃, the corresponding bit depth is only 256 / 120*1.5=3.2 bits.

[0083] By shortening the measurement range to 2℃~8℃ and then using a third sensor of the same 256 bits for writing, the resistance value corresponding to the temperature range of 2℃~8℃ can be written in 256 bits. Compared with the original 3.2 bits, the data acquisition space is increased, which can improve the sampling accuracy.

[0084] For the original wide-range fifth sensor, its sampling accuracy is 0.5℃ (i.e., each bit is written as 0.5℃). The range of 2-8℃ is divided into 12 0.5℃, so each 0.5℃ is about 125Ω, that is, each bit is 125Ω.

[0085] For a narrow-range third sensor, its resistance change is 1.5kΩ and the number of bits written is 256, so each bit is approximately (5.8-4.3)kΩ / 256≈5.8Ω;

[0086] Let the sampling accuracy of the narrow-range third sensor be X, which satisfies the following relationship:

[0087] 125 / 0.5 = 5.8 / X;

[0088] X = 0.023;

[0089] This means that a third sensor with a narrow temperature range of 2℃ to 8℃ is used to collect data separately, and the data collection accuracy can reach 0.023℃, which is about 20 times higher than the previous 0.5℃.

[0090] For the fourth sensor with a medium range, its resistance change is 6kΩ (according to the corresponding resistance table, the resistance change corresponding to the temperature range of -10℃ to 20℃ is 6kΩ), and the number of bits written is 256, so each bit is approximately 6kΩ / 256≈23.4Ω.

[0091] Let the sampling accuracy of the fourth sensor in the medium range be Y, which satisfies the following relationship:

[0092] 125 / 0.5 = 23.4 / Y;

[0093] Y=0.094;

[0094] That is, by using a fourth sensor with a medium range of temperature of -10℃ to 20℃ to collect data independently, the acquisition accuracy can reach 0.096℃, which is about 5.2 times higher than the previous 0.5℃.

[0095] The calculations above show that when the temperature is within the third sampling range, sampling through the third sensor achieves the highest sampling accuracy, which is about 20 times higher than that of a regular sensor. When the temperature is within the fourth sampling range but not within the third sampling range, sampling through the fourth sensor achieves relatively high sampling accuracy, which is about 5.2 times higher than that of a regular sensor. When the temperature is within the fifth sampling range but not within the fourth sampling range, sampling through the fifth sensor can achieve temperature acquisition over a wide range.

[0096] In other words, based on the technical solution of the second embodiment, the present invention can set different sampling accuracies for different temperature ranges, thereby realizing a more refined temperature monitoring strategy and adapting to complex refrigeration systems.

[0097] In this second embodiment, a total of three sensors are used: the third sensor, the fourth sensor, and the fifth sensor. Please refer to [link to relevant documentation]. Figure 3 The logic for selecting a sensor for sampling is as follows:

[0098] Start sampling;

[0099] Is the parameter to be measured within the third sampling range?

[0100] If so, the third sensor is used for sampling, and the fourth and fifth sensors are used for auxiliary verification.

[0101] If not, then further determine whether it is within the fourth sampling range;

[0102] If so, the fourth sensor is used for sampling, and the fifth sensor is used for auxiliary verification;

[0103] If not, then a fifth sensor will be used for sampling.

[0104] This is because the third sampling range has the highest sampling accuracy. If the sample is within the third sampling range, it is preferable to use the third sensor for sampling. The sampling accuracy in the fourth sampling range is relatively higher than that in the fifth sampling range. When the parameter to be measured is not in the third sampling range but is in the fourth sampling range, the fourth sensor with higher sampling accuracy should be selected for sampling. If the parameter to be measured is only in the fifth sampling range and not in the fourth sampling range, it can only be sampled through the fifth sensor.

[0105] This technical solution allows for different sampling accuracies to be set for different temperature ranges, thereby enabling a more refined temperature monitoring strategy that can adapt to complex refrigeration systems.

[0106] Figure 4 To implement the specific process of this second embodiment, the sensor and controller are first initialized, and then the third sensor is set: the third sampling range (2℃, 8℃).

[0107] Set the fourth sensor: fourth sampling range (-10℃, 20℃);

[0108] Set the fifth sensor: fifth sampling range (-50℃, 70℃);

[0109] Set thresholds: Tlow1=2℃, Thigh1=8℃, Tlow2=-10℃, Thigh2=20℃;

[0110] Then, temperature values ​​T3, T4, and T5 are obtained by reading the temperature values ​​through the third, fourth, and fifth sensors respectively.

[0111] Determine whether T3, T4, and T5 are within the third sampling range (2℃, 8℃);

[0112] If so, the third sensor will be used as the primary data acquisition source for high-precision data processing, while the fourth and fifth sensors will be used as auxiliary references.

[0113] If not, further determine whether T3, T4, and T5 are within the fourth sampling range (-10℃, 20℃);

[0114] If so, the fourth sensor will be used as the primary data acquisition source for high-precision data processing, and the fifth sensor will be used as an auxiliary reference.

[0115] If not, the fifth sensor will be enabled as the primary data acquisition source for temperature monitoring and control, and will be continuously read in standby mode.

[0116] Finally, the processed temperature value (T3, T4, or T5) is sent to the refrigerator's display module / control system for precise temperature control.

[0117] The above is a specific solution of the second embodiment of the present invention. As can be seen from the above settings, the present invention sets different sampling accuracies for different temperature ranges, thereby realizing a more refined temperature monitoring strategy and adapting to complex refrigeration systems.

[0118] Based on the technical solutions of the first and second embodiments, the present invention has at least the following beneficial effects:

[0119] 1. This invention improves the accuracy of temperature acquisition by combining a wide-range ordinary sensor and a narrow-range ordinary sensor, while eliminating the need for a high-precision sensor and avoiding increased acquisition costs.

[0120] 2. The present invention can also set three sensors with different ranges to set different sampling accuracies for different temperature ranges, thereby realizing a more refined temperature monitoring strategy and adapting to complex refrigeration systems.

[0121] The present invention also proposes a refrigerator having the above-described sensor system for collecting the temperature of the refrigerator compartment and the freezer compartment, the sensor system employing the above-described sensor system.

[0122] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sensor system for improving sampling accuracy, comprising multiple sensors capable of jointly acquiring the same measured parameter, characterized in that, All the sensors have the same sampling accuracy, and all the sensors have different sampling ranges. At least one of the sensors has a sampling range within the sampling range of another sensor. The sensor system selects the sensor with the corresponding sampling range to collect data for the range of the parameter to be measured.

2. The sensor system for improving sampling accuracy according to claim 1, characterized in that, The sensor system includes a first sensor and a second sensor, and the second sampling range corresponding to the second sensor is greater than the first sampling range corresponding to the first sensor. When the first sensor and the second sensor collect the same parameter to be measured, the first sampling range of the first sensor for the parameter to be measured is within the second sampling range of the second sensor for the parameter to be measured.

3. The sensor system for improving sampling accuracy according to claim 2, characterized in that, When the parameter to be measured is within the first sampling range, the sensor system uses the first sensor for sampling and the second sensor for auxiliary verification. When the parameter to be measured is within the second sampling range and outside the first sampling range, the sensor system uses the second sensor for sampling.

4. The sensor system for improving sampling accuracy according to claim 2, characterized in that, The parameter to be measured is a temperature parameter. The first sampling range of the first sensor for the temperature parameter is (2℃, 8℃), and the second sampling range of the second sensor for the temperature parameter is (-10℃, 15℃).

5. The sensor system for improving sampling accuracy according to claim 4, characterized in that, Both the first sensor and the second sensor use an 8-bit machine to write the parameters to be measured.

6. The sensor system for improving sampling accuracy according to claim 1, characterized in that, The sensor system includes a third sensor, a fourth sensor, and a fifth sensor, wherein the fourth sampling range corresponding to the fourth sensor is greater than the third sampling range corresponding to the third sensor, and the fifth sampling range corresponding to the fifth sensor is greater than the fourth sampling range corresponding to the fourth sensor. When the third sensor, the fourth sensor, and the fifth sensor collect the same parameter to be measured, the third sampling range of the third sensor for the parameter to be measured is within the fourth sampling range of the fourth sensor for the parameter to be measured, and the fourth sampling range of the fourth sensor for the parameter to be measured is within the fifth sampling range of the fifth sensor for the parameter to be measured.

7. The sensor system for improving sampling accuracy according to claim 6, characterized in that, When the parameter to be measured is within the third sampling range, the sensor system uses the third sensor for sampling and uses the fourth and fifth sensors for auxiliary verification. When the parameter to be measured is in the fourth sampling range and outside the third sampling range, the sensor system uses the fourth sensor for sampling and the fifth sensor for auxiliary verification. When the parameter to be measured is within the fifth sampling range and outside the fourth sampling range, the sensor system uses the fifth sensor for sampling.

8. The sensor system for improving sampling accuracy according to claim 6, characterized in that, The parameter to be measured is a temperature parameter. The third sampling range of the third sensor for the temperature parameter is (2℃, 8℃), the fourth sampling range of the fourth sensor for the temperature parameter is (-10℃, 20℃), and the fifth sampling range of the fifth sensor for the temperature parameter is (-50℃, 70℃).

9. The sensor system for improving sampling accuracy according to claim 8, characterized in that, The third, fourth, and fifth sensors all use an 8-bit machine to write the parameters to be measured.

10. A refrigerator, wherein the refrigerator has a sensor system for collecting temperatures in the refrigerator compartment and the freezer compartment, characterized in that, The sensor system described in any one of claims 1 to 9 is used.

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