High-precision sensor with material tower environment compensation function

Abstract

The utility model discloses a high-precision sensor with a material tower environment compensation function, which relates to the technical field of sensors and comprises a processor M1, an illumination acquisition unit, a differential amplification unit and a low-pass filtering unit. The processor M1 is provided with a clock end CLK, a signal input end A0, a processing initial end A1 and a processing completion end A2; the signal output end of the illumination acquisition unit is connected with the signal input end A0 of the processor M1, the input end and the output end of the differential amplification unit are correspondingly connected to the processing initial end A1 of the processor M1 and the input end of the low-pass filtering unit respectively, and the output end of the low-pass filtering unit is connected to the processing completion end A2 of the processor M1; and the clock end CLK of the processor M1 is connected to the time sequence input end of the illumination acquisition unit. According to the utility model, the illumination loss caused by shielding is effectively compensated, the negative influence of the shielding problem of the material tower structure is reduced, and the material tower structure has the advantages of reducing the shielding error of illumination acquisition and enhancing the adaptability of the acquisition environment.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a high-precision sensor with a material tower environmental compensation function. Background Technology

[0002] In applications involving light acquisition in material handling towers, sensors are typically installed outdoors to monitor environmental data in real time. However, this installation method presents several challenges, particularly in temperature control and compensation. Existing light acquisition sensors for material handling towers often suffer from prolonged shading due to the tower's structural design. Furthermore, the intensity and angle of sunlight vary significantly throughout the day and across different geographical locations, resulting in the sensor surface absorbing less sunlight than the actual amount received by the material. Consequently, the temperature readings collected by the sensor are far lower than the actual temperature. Additionally, the lightweight requirements of these applications necessitate a simplified sensor design that compensates for reduced light intensity. Utility Model Content

[0003] This invention provides a high-precision sensor with a tower environment compensation function, which solves the problem that when a sensor in a tower system is blocked, the light intensity is lower than the actual light intensity due to the lack of light compensation.

[0004] This utility model is achieved through the following technical solution:

[0005] A high-precision sensor with a tower environment compensation function includes a main controller, a light acquisition unit, a differential amplification unit, and a low-pass filter unit. The main controller is configured as a processor M1, which has a clock terminal CLK, a signal input terminal A0, a processing initiation terminal A1, and a processing completion terminal A2. The signal output terminal of the light acquisition unit is connected to the signal input terminal A0 of the processor M1. The input and output terminals of the differential amplification unit are respectively connected to the processing initiation terminal A1 of the processor M1 and the input terminal of the low-pass filter unit. The output terminal of the low-pass filter unit is connected to the processing completion terminal A2 of the processor M1. The clock terminal CLK of the processor M1 is connected to the timing input terminal of the light acquisition unit.

[0006] In existing light-collecting sensors for material towers, the structural design of the tower causes the tower frame to continuously block the sensor for extended periods. Furthermore, the intensity and angle of sunlight vary significantly throughout the day and across different geographical locations. This results in the sensor surface absorbing less sunlight than the material actually receives, leading to a much lower temperature reading than the actual temperature. Therefore, this invention provides a high-precision sensor with tower environmental compensation functionality to address the problem of lower-than-actual light intensity readings due to the lack of light compensation when using a blocked sensor in a material tower system.

[0007] Furthermore, the light acquisition unit includes a light sensor M2, a first resistor R1, a second resistor R2, a third resistor R3, and a first capacitor C1; the light sensor M2 is provided with an address input terminal ADDR, a timing input terminal SCL, a bidirectional transmission terminal SDA, and an interrupt output terminal DVI, wherein the bidirectional transmission terminal SDA is set as the signal output terminal of the light acquisition unit;

[0008] The address input terminal ADDR is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded; the timing input terminal SCL is connected to the clock terminal CLK and one end of the third resistor R3 at the same point, and the other end of the third resistor R3 is connected to one end of the second resistor R2 at the same point and connected to the VCC voltage source; the other end of the second resistor R2 is connected to the bidirectional transmission terminal SDA and the signal input terminal A0 at the same point; the interrupt output terminal DVI is connected in series with the first capacitor C1 and the ground terminal in sequence.

[0009] Furthermore, the differential amplifier unit includes a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first amplifier U1, and a second amplifier U2;

[0010] One end of the second capacitor C2 is connected to one end of the fifth resistor R5, one end of the fourth resistor R4, and the initial processing terminal A1 at the same point, and this connection point is designated as endpoint Z. Endpoint Z is set as the input terminal of the differential amplifier unit, and the other end of the fourth resistor R4 is connected to one end of the seventh resistor R7. The other end of the second capacitor C2 is connected to the other end of the fifth resistor R5 and the non-inverting input terminal of the first amplifier U1 at the same point. The inverting input terminal of the first amplifier U1 is connected in series with the sixth resistor R6 and the ground terminal in sequence. The output terminal of the first amplifier U1 is connected to the other end of the seventh resistor R7 and the non-inverting input terminal of the second amplifier at the same point, and the inverting input terminal of the second amplifier U2 is connected in series with the eighth resistor R8 and the ground terminal in sequence. The output terminal of the second amplifier U2 is set as the output terminal of the differential amplifier unit and connected to the input terminal of the low-pass filter unit.

[0011] Furthermore, the differential amplification unit also includes a clamping protection branch, which includes a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first diode Q1, and a second diode Q2.

[0012] Terminals E and F are provided between the fourth resistor R4 and the seventh resistor R7. The other end of the fourth resistor R4 is connected to terminal E along with the anode of the first diode Q1, the cathode of the second diode Q2, one end of the fourth capacitor C4, and one end of the third capacitor C3. The other end of the third capacitor C3 is connected to terminal F along with one end of the seventh resistor R7 and one end of the tenth resistor R10. Diode voltage sources are provided for the cathode of the first diode Q1 and the anode of the second diode Q2. Terminal K is provided between the output terminal of the second amplifier U2 and the input terminal of the low-pass filter unit. The other end of the fourth capacitor C4 is connected to terminal K along with one end of the ninth resistor R9 and the output terminal of the second amplifier U2. The other end of the ninth resistor R9 is connected to the same point along with the other end of the tenth resistor R10 and one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is grounded.

[0013] Furthermore, the low-pass filter unit includes a twelfth resistor, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fifth capacitor C5, a sixth capacitor C6, and a third amplifier U3;

[0014] One end of the thirteenth resistor R13 is set as the input terminal of the low-pass filter unit and connected to the output terminal of the differential amplifier unit. The other end of the thirteenth resistor R13 is connected to one end of the sixth capacitor C6 and one end of the fourteenth resistor R14 at the same point. The other end of the fourteenth resistor R14 is connected to one end of the fifth capacitor C5 and the inverting input terminal of the third amplifier U3 at the same point. The other end of the fifth capacitor C5 is grounded. The non-inverting input terminal of the third amplifier U3 is connected to one end of the twelfth resistor R12 and one end of the fifteenth resistor R15 at the same point. The other end of the fifteenth resistor R15 is grounded. The other end of the twelfth resistor R12 is connected to the output terminal of the third amplifier U3, the other end of the sixth capacitor C6, and the processing completion terminal A2 at the same point. The connection point is set as endpoint H. Endpoint Z is set as the output terminal of the low-pass filter unit.

[0015] Furthermore, amplifier voltage sources are provided at the positive power supply terminals of the first amplifier U1 and the second amplifier U2, and at the negative power supply terminals of the first amplifier U1 and the second amplifier U2.

[0016] Furthermore, the optical sensor M2 uses a BH1750 optical sensor.

[0017] Furthermore, the amplifier voltage source connected to the first amplifier U1 and the amplifier voltage source connected to the second amplifier U2 are both set to 12V.

[0018] Furthermore, the diode voltage source of the first diode Q1 and the diode voltage source of the second diode Q2 are both set to 12V.

[0019] The components and modules mentioned above are all existing technologies. This utility model organically combines them to achieve new technical effects.

[0020] Compared with the prior art, this invention effectively compensates for light loss caused by shading by collecting real-time illumination data and combining it with differential amplification compensation. It also reduces the negative impact of the shading problem of the tower structure causing the light received by the sensor to be lower than the actual light intensity. This invention has the advantages of reducing the shading error of light acquisition and the beneficial effect of enhancing the environmental adaptability of the light acquisition sensor. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0024] Example 1

[0025] like Figure 1 As shown, a high-precision sensor with a tower environment compensation function includes a main controller, a light acquisition unit, a differential amplifier unit, and a low-pass filter unit. The main controller is configured as a processor M1, which has a clock terminal CLK, a signal input terminal A0, a processing initiation terminal A1, and a processing completion terminal A2. The signal output terminal of the light acquisition unit is connected to the signal input terminal A0 of the processor M1. The input and output terminals of the differential amplifier unit are respectively connected to the processing initiation terminal A1 of the processor M1 and the input terminal of the low-pass filter unit. The output terminal of the low-pass filter unit is connected to the processing completion terminal A2 of the processor M1. The clock terminal CLK of the processor M1 is connected to the timing input terminal of the light acquisition unit.

[0026] Furthermore, the light acquisition unit includes a light sensor M2, a first resistor R1, a second resistor R2, a third resistor R3, and a first capacitor C1; the light sensor M2 is provided with an address input terminal ADDR, a timing input terminal SCL, a bidirectional transmission terminal SDA, and an interrupt output terminal DVI, wherein the bidirectional transmission terminal SDA is set as the signal output terminal of the light acquisition unit;

[0027] The address input terminal ADDR is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded; the timing input terminal SCL is connected to the clock terminal CLK and one end of the third resistor R3 at the same point, and the other end of the third resistor R3 is connected to one end of the second resistor R2 at the same point and connected to the VCC voltage source; the other end of the second resistor R2 is connected to the bidirectional transmission terminal SDA and the signal input terminal A0 at the same point; the interrupt output terminal DVI is connected in series with the first capacitor C1 and the ground terminal in sequence.

[0028] Furthermore, the differential amplifier unit includes a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first amplifier U1, and a second amplifier U2;

[0029] One end of the second capacitor C2 is connected to one end of the fifth resistor R5, one end of the fourth resistor R4, and the initial processing terminal A1 at the same point, and this connection point is designated as endpoint Z. Endpoint Z is set as the input terminal of the differential amplifier unit, and the other end of the fourth resistor R4 is connected to one end of the seventh resistor R7. The other end of the second capacitor C2 is connected to the other end of the fifth resistor R5 and the non-inverting input terminal of the first amplifier U1 at the same point. The inverting input terminal of the first amplifier U1 is connected in series with the sixth resistor R6 and the ground terminal in sequence. The output terminal of the first amplifier U1 is connected to the other end of the seventh resistor R7 and the non-inverting input terminal of the second amplifier at the same point, and the inverting input terminal of the second amplifier U2 is connected in series with the eighth resistor R8 and the ground terminal in sequence. The output terminal of the second amplifier U2 is set as the output terminal of the differential amplifier unit and connected to the input terminal of the low-pass filter unit.

[0030] Furthermore, the differential amplification unit also includes a clamping protection branch, which includes a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first diode Q1, and a second diode Q2.

[0031] Terminals E and F are provided between the fourth resistor R4 and the seventh resistor R7. The other end of the fourth resistor R4 is connected to terminal E along with the anode of the first diode Q1, the cathode of the second diode Q2, one end of the fourth capacitor C4, and one end of the third capacitor C3. The other end of the third capacitor C3 is connected to terminal F along with one end of the seventh resistor R7 and one end of the tenth resistor R10. Diode voltage sources are provided for the cathode of the first diode Q1 and the anode of the second diode Q2. Terminal K is provided between the output terminal of the second amplifier U2 and the input terminal of the low-pass filter unit. The other end of the fourth capacitor C4 is connected to terminal K along with one end of the ninth resistor R9 and the output terminal of the second amplifier U2. The other end of the ninth resistor R9 is connected to the same point along with the other end of the tenth resistor R10 and one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is grounded.

[0032] Furthermore, the low-pass filter unit includes a twelfth resistor, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fifth capacitor C5, a sixth capacitor C6, and a third amplifier U3;

[0033] One end of the thirteenth resistor R13 is set as the input terminal of the low-pass filter unit and connected to the output terminal of the differential amplifier unit. The other end of the thirteenth resistor R13 is connected to one end of the sixth capacitor C6 and one end of the fourteenth resistor R14 at the same point. The other end of the fourteenth resistor R14 is connected to one end of the fifth capacitor C5 and the inverting input terminal of the third amplifier U3 at the same point. The other end of the fifth capacitor C5 is grounded. The non-inverting input terminal of the third amplifier U3 is connected to one end of the twelfth resistor R12 and one end of the fifteenth resistor R15 at the same point. The other end of the fifteenth resistor R15 is grounded. The other end of the twelfth resistor R12 is connected to the output terminal of the third amplifier U3, the other end of the sixth capacitor C6, and the processing completion terminal A2 at the same point. The connection point is set as endpoint H. Endpoint Z is set as the output terminal of the low-pass filter unit.

[0034] During operation, the light acquisition unit is used to acquire the light signal indicating the current level of sunlight received by the sensor. The address input terminal ADDR is used to set the I²C device address of M2, facilitating identification by the main controller M1. The timing input terminal SCL receives the clock signal CLK for synchronous data transmission. The bidirectional transmission SDA is used for data interaction with the signal input terminal A0 of the main controller M1. The interrupt output terminal DVI provides an interrupt signal, triggering processing when the light intensity exceeds or falls below a set threshold. The first resistor R1 is used to set the I²C device address of the light sensor M2 to avoid conflicts. The second resistor R2 and the third resistor R3 serve as pull-up resistors for the I²C bus, ensuring the signal integrity of the SDA and SCL lines and improving anti-interference capability. The second resistor R2 stabilizes data transmission, and the third resistor R3 stabilizes the clock signal. The first capacitor C1 is used for filtering and noise reduction and eliminating high-frequency interference, and is connected in series to the interrupt output terminal DVI to reduce false triggering. It should be noted that, as a preferred embodiment, the light sensor M2 in this example uses a BH1750 light sensor, which has a VCC port and a ground port connected to it. A reference temperature value is stored internally in the main processor M1 as the target temperature value. This reference temperature value can be pre-stored via EEPROM / Flash and can be dynamically adjusted according to the environment. The main processor M1 reads the current light intensity provided by the light acquisition unit, compares it with the built-in target correction light temperature, calculates the temperature difference, and marks it as an error compensation value used to adjust the final temperature reading.

[0035] The main processor M1 converts the error compensation value into an error signal for amplification to obtain the final temperature reading that needs adjustment. The error signal between the temperature measured by the sensor and the target rectified illumination temperature may be very small, especially when the illumination intensity is close to the target value, resulting in a very weak error in the signal processing. To clearly identify and adjust the temperature, these weak error signals must be amplified. The differential amplifier unit is used to amplify the error signal. The second capacitor C2 forms an RC filter network to eliminate high-frequency noise, and the fourth resistor R4 and the fifth resistor R5 affect the input impedance to improve signal coupling. The first amplifier U1 initially amplifies the signal; its inverting input is connected to the sixth resistor R6 to form a reference voltage divider network and set the reference voltage for stabilizing the first-order amplification process. The second amplifier U2 directly generates the final amplified error signal, representing a more precise second-order amplification of the error signal, further ensuring that the temperature compensation signal has sufficient dynamic range and improving the accuracy of illumination temperature correction. The seventh resistor R7 and the eighth resistor R8 are used to control the gain of the second amplifier U2, adjust the amplification factor of the error signal, and avoid overcompensation or undercompensation.

[0036] Example 2

[0037] like Figure 1 As shown, the differential amplifier unit also includes a clamping protection branch. In this branch, the third capacitor C3 and the fourth capacitor C4 are used for filtering and energy storage to smooth voltage fluctuations in the circuit and provide a certain amount of transient charge reserve for the diodes. The ninth resistor R9 and the tenth resistor R10 are used to regulate current flow, ensuring the diodes operate under appropriate conditions and preventing excessive current from damaging the circuit. The eleventh resistor R11 provides a safe path to ground when the current is too high. The first diode Q1 and the second diode Q2 act as clamps under different voltage conditions; that is, when the voltage exceeds a preset threshold, the diodes conduct, limiting the voltage and preventing damage to the circuit due to excessive voltage. The positive and negative clamping protection circuit protects the amplifier and subsequent circuits. When the input voltage exceeds the normal operating range, the first diode Q1 and the second diode Q2 begin to conduct, forming a clamping voltage that limits the voltage to a set safe range. Simultaneously, the first diode Q1 and the second diode Q2 share the clamping protection for positive and negative voltages, preventing excessively high or low voltages at the input terminal and ensuring the stability of other components in the circuit.

[0038] The low-pass filter unit is used to filter out high-frequency noise and unwanted high-frequency signals, ensuring a smooth signal from the differential amplifier unit. The thirteenth resistor R13 and the fourteenth resistor R14 are used to adjust the voltage divider and form a filter network with the sixth capacitor C6. The fifteenth resistor R15 provides a negative feedback path for the third amplifier U3, ensuring its stable operation and also adjusting the amplitude of the input signal to prevent it from becoming too large. After the signal enters the low-pass filter unit, it undergoes preliminary filtering through the fourteenth resistor R14 and the fifth capacitor C5 to remove high-frequency noise. The inverting input terminal of the third amplifier U3 is connected to the fourteenth resistor R14 and the fifth capacitor C5, receiving the pre-filtered signal. The third amplifier U3 does not amplify the signal. At this time, the function of the third amplifier is limited to providing a buffer; its main task is to ensure that the signal is smoothly transmitted from the input to the output, avoiding signal distortion or reduced signal strength. In this mode, the third amplifier U3 is equivalent to a voltage follower, its main task being to ensure that the input signal is transmitted stably and without distortion to the subsequent low-pass filter unit and control system. This approach is suitable for situations where signal strength and quality need to be maintained, but gain is not required. The twelfth resistor R12 is used to provide voltage distribution and feedback control at the non-inverting input of the third amplifier U3, ensuring that the amplifier's input signal is stable and undistorted, thereby enabling a smooth signal output.

[0039] Example 3

[0040] like Figure 1As shown, amplifier voltage sources are provided at the positive power terminals of the first amplifier U1 and the second amplifier U2, and at the negative power terminals of the first amplifier U1 and the second amplifier U2; the amplifier voltage sources connected to the first amplifier U1 and the second amplifier U2 are both set to 12V; the diode voltage sources of the first diode Q1 and the second diode Q2 are both set to 12V.

[0041] Both the positive and negative terminals of the power supplies for the first amplifier U1 and the second amplifier U2 are connected to a 12V voltage source. This ensures that the amplifiers can operate stably within a certain voltage range. A 12V voltage typically provides sufficient operating voltage, enabling the amplifiers to perform precise signal processing. Insufficient power supply voltage can lead to unstable output signals, gain distortion, or voltage saturation. A 12V power supply is a common choice, ensuring that the amplifiers' operation is not limited by voltage. The voltage sources for the first diode Q1 and the second diode Q2 are also set to 12V. Their main function is to limit voltage, preventing excessive voltage from entering the circuit and thus protecting other electronic components from damage. The 12V voltage source provides an appropriate forward voltage for the diodes, allowing them to function normally and perform their clamping function. During operation, the diodes conduct or cut off according to the magnitude and direction of the current. When the voltage reaches a certain threshold, the diodes can promptly conduct or cut off, protecting the circuit from overvoltage damage. During operation, the first amplifier U1 receives and processes the signal to be corrected provided by the initial terminal A1, primarily for primary gain, compressing the input dynamic range to the linear response region, and constructing a primary amplification circuit with the ground reference voltage to extract the original error voltage. The second amplifier U2 further amplifies and processes the output signal of U1 to further enhance the signal, while providing voltage drive capability, adapting to the subsequent low-pass filtering, and outputting a higher resolution error signal. This effectively improves the detection sensitivity of small error voltages (such as small temperature changes caused by changes in illumination), avoids the loss of subtle change details due to insufficient gain in single-stage amplification, enhances the system's response capability to low illumination compensation, and thus improves the accuracy of compensation. The combined design of the first amplifier U1 and the second amplifier U2 through a precision resistor network and cascaded amplification makes the output signal purer, helping to improve the authenticity and accuracy of the final temperature compensation data. Therefore, the first amplifier U1 and the second amplifier U2 in the differential amplification unit not only undertake the task of detecting and amplifying the error signal, but also provide high-resolution, high-stability, and high-consistency high-precision illumination compensation data support for the entire sensing system.

[0042] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-precision sensor with a tower environment compensation function, comprising a main controller, characterized in that, It also includes a light acquisition unit, a differential amplification unit, and a low-pass filter unit; the main controller is configured as a processor M1, which is equipped with a clock terminal CLK, a signal input terminal A0, a processing initiation terminal A1, and a processing completion terminal A2; the signal output terminal of the light acquisition unit is connected to the signal input terminal A0 of the processor M1, the input terminal and output terminal of the differential amplification unit are respectively connected to the processing initiation terminal A1 of the processor M1 and the input terminal of the low-pass filter unit, and the output terminal of the low-pass filter unit is connected to the processing completion terminal A2 of the processor M1; the clock terminal CLK of the processor M1 is connected to the timing input terminal of the light acquisition unit.

2. The high-precision sensor with tower environment compensation function according to claim 1, characterized in that, The light acquisition unit includes a light sensor M2, a first resistor R1, a second resistor R2, a third resistor R3, and a first capacitor C1; the light sensor M2 is provided with an address input terminal ADDR, a timing input terminal SCL, a bidirectional transmission terminal SDA, and an interrupt output terminal DVI, wherein the bidirectional transmission terminal SDA is set as the signal output terminal of the light acquisition unit; The address input terminal ADDR is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded; the timing input terminal SCL is connected to the clock terminal CLK and one end of the third resistor R3 at the same point, and the other end of the third resistor R3 is connected to one end of the second resistor R2 at the same point and connected to the VCC voltage source; the other end of the second resistor R2 is connected to the bidirectional transmission terminal SDA and the signal input terminal A0 at the same point; the interrupt output terminal DVI is connected in series with the first capacitor C1 and the ground terminal in sequence.

3. A high-precision sensor with a material tower environmental compensation function according to claim 1, characterized in that, The differential amplifier unit includes a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first amplifier U1, and a second amplifier U2; One end of the second capacitor C2 is connected to one end of the fifth resistor R5, one end of the fourth resistor R4, and the initial processing terminal A1 at the same point, and this connection point is designated as endpoint Z. Endpoint Z is set as the input terminal of the differential amplifier unit, and the other end of the fourth resistor R4 is connected to one end of the seventh resistor R7. The other end of the second capacitor C2 is connected to the other end of the fifth resistor R5 and the non-inverting input terminal of the first amplifier U1 at the same point. The inverting input terminal of the first amplifier U1 is connected in series with the sixth resistor R6 and the ground terminal in sequence. The output terminal of the first amplifier U1 is connected to the other end of the seventh resistor R7 and the non-inverting input terminal of the second amplifier at the same point, and the inverting input terminal of the second amplifier U2 is connected in series with the eighth resistor R8 and the ground terminal in sequence. The output terminal of the second amplifier U2 is set as the output terminal of the differential amplifier unit and connected to the input terminal of the low-pass filter unit.

4. A high-precision sensor with a material tower environmental compensation function according to claim 3, characterized in that, The differential amplification unit also includes a clamping protection branch, which includes a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first diode Q1, and a second diode Q2. Terminals E and F are provided between the fourth resistor R4 and the seventh resistor R7. The other end of the fourth resistor R4 is connected to terminal E along with the anode of the first diode Q1, the cathode of the second diode Q2, one end of the fourth capacitor C4, and one end of the third capacitor C3. The other end of the third capacitor C3 is connected to terminal F along with one end of the seventh resistor R7 and one end of the tenth resistor R10. Diode voltage sources are provided for the cathode of the first diode Q1 and the anode of the second diode Q2. Terminal K is provided between the output terminal of the second amplifier U2 and the input terminal of the low-pass filter unit. The other end of the fourth capacitor C4 is connected to terminal K along with one end of the ninth resistor R9 and the output terminal of the second amplifier U2. The other end of the ninth resistor R9 is connected to the same point along with the other end of the tenth resistor R10 and one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is grounded.

5. A high-precision sensor with a material tower environmental compensation function according to claim 1, characterized in that, The low-pass filter unit includes a twelfth resistor, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fifth capacitor C5, a sixth capacitor C6, and a third amplifier U3; One end of the thirteenth resistor R13 is set as the input terminal of the low-pass filter unit and connected to the output terminal of the differential amplifier unit. The other end of the thirteenth resistor R13 is connected to one end of the sixth capacitor C6 and one end of the fourteenth resistor R14 at the same point. The other end of the fourteenth resistor R14 is connected to one end of the fifth capacitor C5 and the inverting input terminal of the third amplifier U3 at the same point. The other end of the fifth capacitor C5 is grounded. The non-inverting input terminal of the third amplifier U3 is connected to one end of the twelfth resistor R12 and one end of the fifteenth resistor R15 at the same point. The other end of the fifteenth resistor R15 is grounded. The other end of the twelfth resistor R12 is connected to the output terminal of the third amplifier U3, the other end of the sixth capacitor C6, and the processing completion terminal A2 at the same point. The connection point is set as endpoint H. Endpoint Z is set as the output terminal of the low-pass filter unit.

6. A high-precision sensor with a material tower environmental compensation function according to claim 3, characterized in that, The positive power supply terminals of the first amplifier U1 and the second amplifier U2, and the negative power supply terminals of the first amplifier U1 and the second amplifier U2, are all equipped with amplifier voltage sources.

7. A high-precision sensor with a material tower environmental compensation function according to claim 2, characterized in that, The optical sensor M2 uses a BH1750 optical sensor.

8. A high-precision sensor with a material tower environmental compensation function according to claim 6, characterized in that, The amplifier voltage source connected to the first amplifier U1 and the amplifier voltage source connected to the second amplifier U2 are both set to 12V.

9. A high-precision sensor with a material tower environmental compensation function according to claim 4, characterized in that, The diode voltage source of the first diode Q1 is set to 12V.

10. A high-precision sensor with a tower environment compensation function according to claim 4, characterized in that, The diode voltage source of the second diode Q2 is set to 12V.

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