CN217424394U - Zero-full-position adjusting system of sensor - Google Patents
Zero-full-position adjusting system of sensor Download PDFInfo
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- CN217424394U CN217424394U CN202222144238.4U CN202222144238U CN217424394U CN 217424394 U CN217424394 U CN 217424394U CN 202222144238 U CN202222144238 U CN 202222144238U CN 217424394 U CN217424394 U CN 217424394U
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Abstract
The utility model discloses a zero-full-position adjusting system of a sensor, which adopts a temperature compensation voltage-dividing module consisting of a thermistor and a fixed resistor, thereby generating a reference voltage of temperature compensation as a reference voltage corresponding to the zero position of the sensor, and the zero position output of the sensor is compensated by a preset temperature curve in the opposite direction under the influence of temperature; the output voltage of the sensor changes from minimum to maximum, and changes from maximum to minimum after inverse amplification, and the voltage is subjected to subtraction operation with reference voltage through an operational amplifier and is amplified in proportion to the temperature compensation of the reference voltage, so that the temperature compensation in the full-range is realized; because the reference voltage is equal to the zero-position voltage, the operation of adjusting the full position of the sensor cannot influence the zero-adjusting result, and the zero-full position adjustment can be completed at one time without repeatedly adjusting the zero position and the full position according to the operation steps of firstly adjusting the zero position and then adjusting the full position.
Description
Technical Field
The utility model relates to an electron technology and zero full position field of adjusting, concretely relates to zero full position governing system of sensor.
Background
The sensor is influenced by the change of the measured physical quantity, the physical characteristic of the self sensitive element changes, the output electric signal changes along with the change of the measured physical quantity, the electric signal can be caused by the difference of the sensitive degree of the element or the difference of the measuring range, the output current or the voltage of the electric signal is required to change in a specified range to adapt to the range of the subsequent sampling or gauge head measuring range, and the adjusting process can be divided into zero adjustment (called zero adjustment for short) for setting the minimum value and full adjustment (called full adjustment for short) for setting the maximum value.
When the physical quantity detected by the sensor is at a low point, the corresponding output voltage signal of the sensor is zero voltage, the voltage is combined with non-zero voltage in most fields, and the voltage is used as the non-zero minimum value output by the sensor and is used for indicating that the sensor is in a normal working state and the detected quantity is in a low state. For analog output sensors, signal output ranges of 1-5V voltage, 2.1-7.2V voltage, and 4-20 mA current are common, wherein the current output is usually converted from voltage output.
The zero setting process usually needs to attenuate or reduce the amplification factor of the signal, while the full setting process needs to amplify or increase the amplification factor of the signal, so that the zero setting and the full setting mutually affect each other, and the zero setting and the full setting need to be repeatedly adjusted for many times to simultaneously meet the precision requirements of the zero position and the full position.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the zero full level of sensor is adjusted the difficulty, and aim at provides a zero full level governing system of sensor, because of zero adjustment and full influence each other among the solution prior art, leads to the zero full level of sensor to be difficult to the problem of adjusting.
The utility model discloses a following technical scheme realizes:
a zero-full level adjusting system of a sensor comprises the sensor, a zero adjusting module, an amplifying module, a temperature compensation voltage dividing module, a reference buffering module and a full level adjusting and outputting module;
the sensor is electrically connected with the zero-position adjusting module, the zero-position adjusting module is electrically connected with the amplifying module, the temperature compensation voltage dividing module is electrically connected with the reference buffering module, the reference buffering module and the amplifying module are both electrically connected with the zero-full-position and output module, and the output end of the zero-full-position and output module is the output end of the zero-full-position adjusting system.
Further, temperature compensation voltage division module includes resistance R4, ground resistance R5, resistance R6 and thermistor RT, resistance R4's one end is connected with outside constant voltage power supply V1's output, resistance R4's the other end is connected with resistance R5's one end and ground resistance R6 respectively, just resistance R4's the other end and benchmark buffering module electric connection, resistance R5's the other end is connected with thermistor RT's one end, thermistor RT's the other end ground connection.
Further, the reference buffer module includes an operational amplifier OP1, a non-inverting input terminal of the operational amplifier OP1 is connected to the other terminal of the resistor R4, an inverting input terminal of the operational amplifier OP1 is connected to an output terminal thereof, and an output terminal of the operational amplifier OP1 is electrically connected to the full level adjustment and output module.
Further, the zero adjustment module comprises a zero adjustment sliding resistor RP1, a first fixed end of the zero adjustment sliding resistor RP1 is connected with the output end of the sensor, a second fixed end of the zero adjustment sliding resistor RP1 is grounded, and a sliding end of the zero adjustment sliding resistor RP1 is electrically connected with the amplification module.
Further, the amplifying module comprises a grounded capacitor C1 and an operational amplifier OP2, a non-inverting input terminal of the operational amplifier OP2 is connected with a sliding terminal of the grounded capacitor C1 and a sliding terminal of the zero adjustment sliding resistor RP1, an inverting input terminal of the operational amplifier OP2 is connected with an output terminal thereof, and an output terminal of the operational amplifier OP2 is electrically connected with the full level adjustment and output module.
Further, the full-level adjustment and output module comprises a full-level adjustment sliding resistor RP2, a resistor R1, a resistor R7 and an operational amplifier OP 3;
one end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier OP3, the first fixed end of the full-level adjusting sliding resistor RP2 is connected with the output end of the operational amplifier OP2, the second fixed end of the full-level adjusting sliding resistor RP2 is connected with the sliding end of the full-level adjusting sliding resistor RP2, the second fixed end of the full-level adjusting sliding resistor RP2 is connected with the inverting input end of the operational amplifier OP3 and one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is the output end of the zero full-level and the output module.
Further, the amplifying module comprises a resistor R2, a grounding resistor R3, a resistor R8, a resistor R9 and an operational amplifier OP 2;
one end of the resistor R8 is connected with the sliding end of the zero adjustment sliding resistor RP1, the other end of the resistor R8 is connected with one end of the resistor R9 and the inverting input end of the operational amplifier OP2, the non-inverting input end of the operational amplifier OP2 is connected with one ends of the grounding resistor R3 and the resistor R2, the other end of the resistor R2 is connected with the reference voltage Vref, the other end of the resistor R9 is connected with the output end of the operational amplifier OP2, and the output end of the operational amplifier OP2 is electrically connected with the full-level adjustment and output module.
Further, the voltage at the sliding end of the zero adjustment sliding resistor RP1 is denoted as a voltage V5, the voltage at the output end of the operational amplifier OP1 is denoted as a voltage V3, and the absolute value of the reference voltage Vref minus the voltage V5 is less than or equal to the voltage V3.
Further, the full-level regulation and output module comprises a full-level regulation sliding resistor RP2, a resistor R1, a resistor R7, a resistor R10 and an operational amplifier OP 3;
one end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is connected with one end of the resistor R10 and the non-inverting input end of the operational amplifier OP3, the other end of the resistor R10 is electrically connected with the output end of the operational amplifier OP2, the inverting input end of the operational amplifier OP3 is connected with one end of the resistor R1 and the first fixed end of the full-position adjusting sliding resistor RP2, the first fixed end and the sliding end of the full-position adjusting sliding resistor RP2 are both grounded, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is the output end of the zero full-position and output module.
Further, the thermistor RT is provided as a platinum resistor.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model provides a zero-full-position adjusting system of a sensor, which adopts a temperature compensation voltage-dividing module consisting of a thermistor and a fixed resistor, thereby generating a reference voltage of temperature compensation, and the reference voltage is used as a reference voltage corresponding to the zero position of the sensor, and the zero position output of the sensor is compensated by a preset temperature curve in the opposite direction under the influence of temperature; the output voltage of the sensor changes from minimum to maximum, and changes from maximum to minimum after inverse amplification, and the voltage is subjected to subtraction operation with reference voltage through an operational amplifier and is amplified in proportion to the temperature compensation of the reference voltage, so that the temperature compensation in the full-range is realized; because the reference voltage is equal to the zero-position voltage, the operation of adjusting the full position of the sensor cannot influence the zero-adjusting result, and the zero-full position adjustment can be completed at one time without repeatedly adjusting the zero position and the full position according to the operation steps of firstly adjusting the zero position and then adjusting the full position.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a zero-full-position adjusting system of a sensor according to the present invention.
Fig. 2 is a first exemplary diagram of a zero-full-position adjustment system of a sensor according to the present invention.
Fig. 3 is a second exemplary diagram of a zero-full-position adjusting system of a sensor according to the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1, a zero-full level adjustment system of a sensor includes a sensor, a zero adjustment module, an amplification module, a temperature compensation voltage division module, a reference buffer module, and a full level adjustment and output module.
The sensor is electrically connected with the zero-position adjusting module, the zero-position adjusting module is electrically connected with the amplifying module, the temperature compensation voltage-dividing module is electrically connected with the reference buffering module, the reference buffering module and the amplifying module are both electrically connected with the zero-full-position and output module, and the output end of the zero-full-position and output module is the output end of the zero-full-position adjusting system.
For non-temperature sensors, temperature changes often affect the physical characteristics of the sensor, and thus affect the accuracy of the sensor, so temperature compensation needs to be performed on the sensor to compensate for output deviation caused by temperature changes.
If the output voltage of the sensor decreases with increasing temperature, temperature compensation is performed using the first example shown in fig. 2 to offset the deviation caused by the increase in temperature.
As shown in fig. 2, the temperature compensation voltage division module includes a resistor R4, a ground resistor R5, a resistor R6, and a thermistor RT, one end of the resistor R4 is connected to an output end of the external regulated power supply V1, the other end of the resistor R4 is connected to one end of the resistor R5 and the ground resistor R6, the other end of the resistor R4 is electrically connected to the reference buffer module, the other end of the resistor R5 is connected to one end of the thermistor RT, and the other end of the thermistor RT is grounded.
By changing the resistance values of the resistor R4, the ground resistor R5, and the resistor R6, the temperature change rate of the output reference voltage can be changed. The voltage at the other end of the resistor R4 is denoted as voltage V2, and the voltage V2 serves as a reference voltage corresponding to the null position of the sensor (i.e., the voltage of the null position of the sensor at normal temperature).
It should be noted that, in addition to the temperature compensation voltage division module described in this embodiment, reference voltages may be generated by other sensors and corresponding peripheral circuits, for example, a humidity sensor and a peripheral circuit may be used to generate a humidity compensation reference voltage to eliminate the influence of humidity on the sensor output.
In one possible embodiment, the reference buffer module includes an operational amplifier OP1, a non-inverting input terminal of the operational amplifier OP1 is connected to the other terminal of the resistor R4, an inverting input terminal of the operational amplifier OP1 is connected to an output terminal thereof, and an output terminal of the operational amplifier OP1 is electrically connected to the full level adjustment and output module.
The voltage at the output terminal of the operational amplifier OP1 is denoted as voltage V3, and after the voltage V2 is buffered by the operational amplifier OP1, the voltage V3 is outputted to maintain the load stability.
In a possible implementation manner, the null adjustment module comprises a null adjustment sliding resistor RP1, a first fixed end of the null adjustment sliding resistor RP1 is connected with the output end of the sensor, a second fixed end of the null adjustment sliding resistor RP1 is grounded, and a sliding end of the null adjustment sliding resistor RP1 is electrically connected with the amplification module.
In fig. 2, the other end of the first fixed end of the null adjustment sliding resistor RP1 is a sensor, and the illustrated sensor is a capacitive liquid level sensor, which is only used for example and is not described again.
In one possible implementation, the amplifying module includes a grounded capacitor C1 and an operational amplifier OP2, a non-inverting input terminal of the operational amplifier OP2 is connected to a sliding terminal of the grounded capacitor C1 and the zero adjustment sliding resistor RP1, a non-inverting input terminal of the operational amplifier OP2 is connected to an output terminal thereof, and an output terminal of the operational amplifier OP2 is electrically connected to the full level adjustment and output module.
In one possible implementation, the full-level adjustment and output module includes a full-level adjustment sliding resistor RP2, a resistor R1, a resistor R7, and an operational amplifier OP 3;
one end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier OP3, the first fixed end of the full-level adjusting sliding resistor RP2 is connected with the output end of the operational amplifier OP2, the second fixed end of the full-level adjusting sliding resistor RP2 is connected with the sliding end of the full-level adjusting sliding resistor RP2, the second fixed end of the full-level adjusting sliding resistor RP2 is respectively connected with the inverting input end of the operational amplifier OP3 and one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is zero full-level and the output end of the output module.
The voltage V2 is a reference voltage subjected to temperature compensation and also serves as a zero voltage, and the voltage is buffered by the operational amplifier OP1 to output a voltage V3, so that V3= V2; the voltage V4 is the sensor output voltage, and is amplified after the voltage division of the sliding resistor RP1 and the operational amplifier OP2 are adjusted by null adjustment, so that the voltage V6 output by the operational amplifier OP2 is always less than or equal to the voltage V2, therefore:
V7 = （V3-V6）×（R1÷RP2）+ V3
where V7 represents the voltage at the output of the operational amplifier OP 3.
When the sensor sensing physical quantity is at the minimum value, the voltage V4 output by the sensor is the minimum, R2= R3= R4= R5 in the circuit, then V6= Vref-V5, and when the zero adjustment adjusting sliding resistance RP1 is adjusted to make V6= V3, V7 = V3 outputs the minimum voltage to realize zero adjustment.
When the sensed physical quantity of the sensor changes from minimum to maximum, the voltage V4 output by the sensor gradually increases, the position of the adjusted zero adjustment sliding resistor RP1 is kept unchanged, and the voltage V6 gradually decreases. When the voltage V4 output by the sensor reaches the maximum, the voltage V6 has the minimum value, and the full-position adjusting sliding resistor RP2 is adjusted, so that the voltage V7 reaches the full-position voltage, and the full-position adjustment is completed.
If the output voltage of the sensor increases with increasing temperature, temperature compensation is performed using the second example shown in fig. 3 to offset the deviation caused by the increase in temperature.
In fig. 3, the other end of the first fixed end of the null adjustment sliding resistor RP1 is a sensor, and the structures in the illustrated example are a bridge and an operational amplifier inside the sensor, which are only used for example and are not described again.
As shown in fig. 3, the amplifying module includes a resistor R2, a ground resistor R3, a resistor R8, a resistor R9, and an operational amplifier OP 2.
One end of a resistor R8 is connected with the sliding end of a zero adjustment sliding resistor RP1, the other end of a resistor R8 is respectively connected with one end of a resistor R9 and the inverting input end of an operational amplifier OP2, the non-inverting input end of the operational amplifier OP2 is respectively connected with one end of a grounding resistor R3 and one end of a resistor R2, the other end of the resistor R2 is connected with a reference voltage Vref, the other end of the resistor R9 is connected with the output end of the operational amplifier OP2, and the output end of the operational amplifier OP2 is electrically connected with a full-level adjustment and output module.
In one possible embodiment, the voltage at the sliding terminal of the zeroing sliding resistor RP1 is denoted as voltage V5, the voltage at the output terminal of the operational amplifier OP1 is denoted as voltage V3, and the absolute value of the reference voltage Vref minus the voltage V5 is less than or equal to the voltage V3.
In one possible implementation, the full-level adjustment and output module includes a full-level adjustment sliding resistor RP2, a resistor R1, a resistor R7, a resistor R10, and an operational amplifier OP 3.
One end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is respectively connected with one end of the resistor R10 and the non-inverting input end of the operational amplifier OP3, the other end of the resistor R10 is electrically connected with the output end of the operational amplifier OP2, the inverting input end of the operational amplifier OP3 is respectively connected with one end of the resistor R1 and the first fixed end of the full-level adjusting sliding resistor RP2, the first fixed end and the sliding end of the full-level adjusting sliding resistor RP2 are both grounded, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is zero full-level and the output end of the output module.
In one possible embodiment, the thermistor RT is provided as a platinum resistor.
The utility model provides a zero full position governing system of sensor adopts the temperature compensation voltage divider module that thermistor and fixed resistance constitute to produce temperature compensation's reference voltage, as the reference voltage that the zero-bit of sensor corresponds, and the influence of sensor zero-bit output by the temperature is compensated by the temperature curve that presets in the opposite direction; the output voltage of the sensor changes from minimum to maximum, and changes from maximum to minimum after inverse amplification, and the voltage is subjected to subtraction operation with reference voltage through an operational amplifier and is amplified in proportion to the temperature compensation of the reference voltage, so that the temperature compensation in the full-range is realized; because the reference voltage is equal to the zero-position voltage, the operation of adjusting the full position of the sensor cannot influence the zero-adjusting result, and the zero-full position adjustment can be completed at one time without repeatedly adjusting the zero position and the full position according to the operation steps of firstly adjusting the zero position and then adjusting the full position.
The utility model discloses a theory of operation does:
a temperature compensation voltage division module consisting of a thermistor RT and a fixed resistor is used for dividing voltage of the stabilized voltage power supply V1 to obtain a reference voltage V2 which changes along with temperature, and parameters of the thermistor RT and the temperature compensation voltage division module are selected to enable the change curve of the reference voltage to be opposite to the temperature curve of the sensor. The voltage V2 output by the sensor is attenuated by the zero adjustment sliding resistor RP1, is amplified in reverse phase by the amplification module, and then is input into the full adjustment and output module. By adjusting the zero adjustment sliding resistor RP1, when the sensor is at the zero point, the voltage V6 is equal to the reference voltage V2, the zero voltage which does not change along with the gain of the operational amplifier OP3 is obtained, and meanwhile, the temperature influence of the sensor is compensated because the zero voltage changes along with the temperature. And adjusting the full-level adjusting sliding resistor RP2 to ensure that the output voltage of the operational amplifier OP3 reaches a full-level value when the sensor output is maximum, and at the moment, because the zero-setting working principle is that the sensor voltage is equal to the reference voltage, the output is equal to the reference voltage after offset, the zero-setting result is not influenced in the full-setting process.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A zero-full level adjusting system of a sensor is characterized by comprising the sensor, a zero adjusting module, an amplifying module, a temperature compensation voltage dividing module, a reference buffering module and a full level adjusting and outputting module;
the sensor is electrically connected with the zero-position adjusting module, the zero-position adjusting module is electrically connected with the amplifying module, the temperature compensation voltage dividing module is electrically connected with the reference buffering module, the reference buffering module and the amplifying module are both electrically connected with the zero-full-position and output module, and the output end of the zero-full-position and output module is the output end of the zero-full-position adjusting system.
2. The zero-full-level regulation system of the sensor according to claim 1, wherein the temperature compensation voltage division module comprises a resistor R4, a ground resistor R5, a resistor R6 and a thermistor RT, one end of the resistor R4 is connected with the output end of an external regulated power supply V1, the other end of the resistor R4 is respectively connected with one end of a resistor R5 and the ground resistor R6, the other end of the resistor R4 is electrically connected with the reference buffer module, the other end of the resistor R5 is connected with one end of the thermistor RT, and the other end of the thermistor RT is grounded.
3. The system of claim 2, wherein the reference buffer module comprises an operational amplifier OP1, a non-inverting input of the operational amplifier OP1 is connected to the other end of the resistor R4, an inverting input of the operational amplifier OP1 is connected to the output thereof, and the output of the operational amplifier OP1 is electrically connected to the full level adjustment and output module.
4. The system of claim 3, wherein the null adjustment module comprises a null adjustment sliding resistor RP1, a first fixed end of the null adjustment sliding resistor RP1 is connected to the output end of the sensor, a second fixed end of the null adjustment sliding resistor RP1 is connected to ground, and a sliding end of the null adjustment sliding resistor RP1 is electrically connected to the amplification module.
5. The system of claim 4, wherein the amplifying module comprises a grounded capacitor C1 and an operational amplifier OP2, the non-inverting input terminal of the operational amplifier OP2 is connected to the grounded capacitor C1 and the sliding terminal of the null adjustment sliding resistor RP1, the inverting input terminal of the operational amplifier OP2 is connected to the output terminal thereof, and the output terminal of the operational amplifier OP2 is electrically connected to the full-level adjustment and output module.
6. The zero-full adjustment system of sensor of claim 5, wherein the full adjustment and output module comprises a full adjustment sliding resistor RP2, a resistor R1, a resistor R7, and an operational amplifier OP 3;
one end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier OP3, the first fixed end of the full-level adjusting sliding resistor RP2 is connected with the output end of the operational amplifier OP2, the second fixed end of the full-level adjusting sliding resistor RP2 is connected with the sliding end of the full-level adjusting sliding resistor RP2, the second fixed end of the full-level adjusting sliding resistor RP2 is connected with the inverting input end of the operational amplifier OP3 and one end of the resistor R1, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is the output end of the zero full-level and the output module.
7. The zero-full-level adjustment system of the sensor according to claim 4, wherein the amplification module comprises a resistor R2, a ground resistor R3, a resistor R8, a resistor R9, and an operational amplifier OP 2;
one end of the resistor R8 is connected with the sliding end of the zero adjustment sliding resistor RP1, the other end of the resistor R8 is connected with one end of the resistor R9 and the inverting input end of the operational amplifier OP2, the non-inverting input end of the operational amplifier OP2 is connected with one ends of the grounding resistor R3 and the resistor R2, the other end of the resistor R2 is connected with the reference voltage Vref, the other end of the resistor R9 is connected with the output end of the operational amplifier OP2, and the output end of the operational amplifier OP2 is electrically connected with the full-level adjustment and output module.
8. The system of claim 7, wherein the voltage across the sliding end of the zero adjustment sliding resistor RP1 is represented as voltage V5, the voltage across the output end of the operational amplifier OP1 is represented as voltage V3, and the absolute value of the voltage V5 subtracted from the reference voltage Vref is less than or equal to voltage V3.
9. The zero-full-level regulation system of the sensor according to claim 8, wherein the full-level regulation and output module comprises a full-level regulation sliding resistor RP2, a resistor R1, a resistor R7, a resistor R10 and an operational amplifier OP 3;
one end of the resistor R7 is connected with the output end of the operational amplifier OP1, the other end of the resistor R7 is connected with one end of the resistor R10 and the non-inverting input end of the operational amplifier OP3, the other end of the resistor R10 is electrically connected with the output end of the operational amplifier OP2, the inverting input end of the operational amplifier OP3 is connected with one end of the resistor R1 and the first fixed end of the full-position adjusting sliding resistor RP2, the first fixed end and the sliding end of the full-position adjusting sliding resistor RP2 are both grounded, the other end of the resistor R1 is connected with the output end of the operational amplifier OP3, and the output end of the operational amplifier OP3 is the output end of the zero full-position and output module.
10. The system for zero-full adjustment of a sensor according to any one of claims 2-9, characterized in that said thermistor RT is provided as a platinum resistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222144238.4U CN217424394U (en) | 2022-08-16 | 2022-08-16 | Zero-full-position adjusting system of sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222144238.4U CN217424394U (en) | 2022-08-16 | 2022-08-16 | Zero-full-position adjusting system of sensor |
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| CN217424394U true CN217424394U (en) | 2022-09-13 |
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