一种用于位置敏感传感器的信号处理电路
By designing differential subtraction and addition circuits in the signal processing circuit, the signal of the position-sensitive sensor is processed, solving the problem that the existing technology cannot simultaneously obtain the light spot displacement and light spot intensity, and realizing the simultaneous measurement of light spot displacement and light spot intensity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINGAN LEAGUE TECHNICIAN COLLEGE (XINGAN LEAGUE SECONDARY VOCATIONAL EDUCATION CENT)
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing resistance/voltage (R/V) conversion methods cannot simultaneously acquire information on spot displacement and spot intensity, resulting in incomplete signal processing for position-sensitive sensors.
A signal processing circuit was designed, including a signal conversion circuit, a differential subtraction circuit, and a differential addition circuit. By performing differential voltage signal conversion, amplification, and addition operations on the electrical signal output by the position-sensitive sensor, the circuit reflects the light spot displacement and light spot intensity, respectively.
Simultaneous measurement of spot displacement and spot intensity was achieved, improving the comprehensiveness and accuracy of signal processing.
Smart Images
Figure CN224521025U_ABST
Abstract
Claims
1. A signal processing circuit for a position sensitive sensor, characterized by, include: A position-sensitive sensor, wherein the output terminal of the position-sensitive sensor is connected to the input terminal of a signal conversion circuit; The output of the signal conversion circuit is connected to the differential subtraction circuit and the differential addition circuit, respectively. The signal conversion circuit is used to convert the electrical signal output by the position-sensitive sensor into a differential voltage signal; the differential subtraction circuit is used to amplify the differential voltage signal to form a first pre-processed signal; and the differential addition circuit is used to perform addition operations on the differential voltage signal to form a second pre-processed signal.
2. A signal processing circuit for a position sensitive sensor according to claim 1, wherein, The signal conversion circuit includes: The first operational amplifier (D1) has its inverting input connected to pin 8 of the position-sensitive sensor, and its non-inverting input grounded. The fifth resistor (R5) has one end connected to the inverting input terminal of the first operational amplifier (D1) and the other end connected to the output terminal of the first operational amplifier (D1). A fifth capacitor (C5), one end of which is connected to one end of a fifth resistor (R5), and the other end of which is connected to the other end of a fifth resistor (R5); The first capacitor (C1) has one end connected to the output terminal of the first operational amplifier (D1), and the other end grounded.
3. A signal processing circuit for a position sensitive sensor according to claim 2, wherein, The signal conversion circuit further includes: The second operational amplifier (D2) has its inverting input connected to pin 4 of the position-sensitive sensor, and its non-inverting input grounded. The third resistor (R3) has one end connected to the inverting input terminal of the second operational amplifier (D2), and the other end connected to the output terminal of the second operational amplifier (D2). A sixth capacitor (C6), one end of which is connected to one end of a third resistor (R3), and the other end of which is connected to the other end of a third resistor (R3); The second capacitor (C2) has one end connected to the output terminal of the second operational amplifier (D2), and the other end grounded.
4. A signal processing circuit for a position sensitive sensor according to claim 3, wherein, The first and fifth pins of the position-sensitive sensor are both connected to one end of the second resistor (R2), and the other end of the second resistor (R2) is connected to the power supply; one end of the fourth resistor (R4) is connected to one end of the second resistor (R2), and the other end of the fourth resistor (R4) is grounded.
5. A signal processing circuit for a position sensitive sensor according to claim 4, wherein, The differential subtraction circuit includes: The third operational amplifier (D3) has its inverting input connected to one end of the tenth resistor (R10), and the other end of the tenth resistor (R10) connected to the output of the second operational amplifier (D2); the non-inverting input of the third operational amplifier (D3) is grounded. The ninth resistor (R9) has one end connected to the inverting input terminal of the third operational amplifier (D3) and the other end connected to the output terminal of the second operational amplifier (D2). The sixth resistor (R6) has one end connected to one end of the tenth resistor (R10), and the other end connected to the output terminal of the third operational amplifier (D3). The third capacitor (C3) has one end connected to the output terminal of the third operational amplifier (D3), and the other end grounded.
6. A signal processing circuit for a position sensitive sensor according to claim 5, wherein, The differential adder circuit includes: The fourth operational amplifier (D4) has its non-inverting input connected to one end of the eleventh resistor (R11), and the other end of the eleventh resistor (R11) connected to the output of the first operational amplifier (D1); the fourth operational amplifier (D4) has its inverting input connected to one end of the seventh resistor (R7), and the other end of the seventh resistor (R7) connected to the output of the second operational amplifier (D2). The first resistor (R1) is connected to one end of the seventh resistor (R7), and the other end of the first resistor (R1) is connected to one end of the fourth capacitor (C4). The other end of the second capacitor (C2) is connected to the first resistor (R1).
7. A signal processing circuit for a position sensitive sensor according to claim 6, wherein, The differential adder circuit further includes: The eighth resistor (R8) has one end connected to the non-inverting input of the fourth operational amplifier (D4), and the other end grounded.