Circuit for receiving displacement signal and changing working state according to displacement value

Abstract

The utility model provides a circuit which receives a displacement signal and changes a working state according to a displacement value. Comprising a displacement sensing circuit, an oscillating circuit, a feedback amplifying circuit, a filter circuit, a switching circuit and a temperature compensating circuit which are respectively connected between a pin 1 and a pin 3, the displacement sensing circuit is sequentially connected with the feedback amplifying circuit, the oscillating circuit and the switching circuit, and an anode and a cathode of an output end of the switching circuit are respectively connected with a pin 2 and the pin 3. According to the utility model, the displacement process of the displacement sensor is directly received through the induction coil, the use of software is reduced, the response is rapid, a voltage signal changes with a displacement signal in high real time, and a rear-end circuit can rapidly receive and feed back the signal; and the debugging performance and the maintainability are good.

Description

Technical Field

[0001] This utility model relates to a circuit that receives displacement signals and changes its operating state according to the displacement value. Background Technology

[0002] In many industrial production and automated control systems, it is often necessary to receive displacement signals from objects and output different signals based on the displacement values ​​to adjust the operating state of the equipment. However, domestically produced displacement detection and signal control circuits currently have many problems. For example, some circuits have low accuracy in recognizing displacement signals and cannot accurately obtain the displacement value, leading to inaccurate subsequent control actions; some circuits have slow response speeds and cannot quickly, accurately, and stably change the operating state based on the displacement value after detection. Therefore, developing a circuit that can accurately receive displacement values ​​and quickly, accurately, and stably change the operating state based on the displacement values ​​is of great significance.

[0003] For example, the magnetic induction switch disclosed in CN2676497Y activates the switch circuit by generating an induced electromotive force when a relative displacement occurs between the magnet and the induction coil, thus turning on the output terminal. This reduces the control process of data acquisition and transmission, and directly controls the switch circuit. However, it cannot adjust the switch state based on the displacement progress of the displacement sensor. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a circuit that receives displacement signals and changes its working state according to the displacement value.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a circuit for receiving displacement signals and changing its operating state according to the displacement value; it includes a displacement sensing circuit, an oscillation circuit, a feedback amplification circuit, a filter circuit, a switching circuit, and a temperature compensation circuit connected between pins 1 and 3 respectively. The displacement sensing circuit is connected in sequence to the feedback amplification circuit, the oscillation circuit, and the switching circuit. The positive and negative terminals of the output of the switching circuit are connected to pins 2 and 3 respectively. The displacement sensing circuit includes a first mutual inductance coil L1 and a second mutual inductance coil L2. The primary side of the first mutual inductance coil L1 is connected in series with the primary side of the second mutual inductance coil L2 in the forward direction, and the secondary side of the first mutual inductance coil L1 is connected in series with the secondary side of the second mutual inductance coil L2 in the reverse direction. The unused end of the first mutual inductance coil is connected to pin 1, and the unused end of the second mutual inductance coil L2 is connected to the oscillation circuit. The two ends of the series connection between the secondary side of the first mutual inductance coil L1 and the second mutual inductance coil L2 are connected in parallel with the temperature compensation circuit. Pins 1 and 3 are connected to the positive and negative terminals of a 28V power supply respectively, and pin 2 is connected to the load.

[0007] The oscillation circuit includes a transistor V2. The collector of transistor V2 is connected to the second mutual inductor. The emitter is connected to pin 3 through resistor R25. The base is connected to resistor R5, capacitor C4, and resistor R6 respectively. Resistor R5 is connected to pin 1. Resistor R6 is connected to the anode of diode V11. The cathode of diode V11 is connected to pin 3. Capacitor C4 is connected to the feedback amplifier circuit. The collector of transistor V2 is connected to the primary side of the second mutual inductor and is connected to the base of transistor V3 through capacitor C5.

[0008] The feedback amplifier circuit includes a transistor V1. The base of transistor V1 is connected to the output terminal of the displacement sensor circuit through parallel capacitors C2 and C8. The collector is connected to pin 1 through resistor R3 and coupled to the oscillation circuit through capacitor C4. The emitter is connected to pin 3 through parallel capacitor C3 and resistor R4.

[0009] The filter circuit includes a polarized capacitor C1. The positive terminal of the polarized capacitor C1 is connected to pin 1 through resistors R16 and R26 in sequence, and the negative terminal is connected to pin 3.

[0010] The contacts of resistors R16 and R26 are also connected to the cathode of Zener diode V8, the anode of Zener diode V8 is connected to the cathode of Zener diode V9, and the anode of Zener diode V9 is connected to pin 3.

[0011] The switching circuit includes transistors V3, V4, and V5. The base of transistor V3 is connected to resistor R14 and capacitor C5. Capacitor C5 is connected to the collector of transistor V2. Resistor R14 is connected to the rear terminal of resistor R16. The collector of transistor V3 is connected to resistors R17 and R18 in sequence. The junction between resistors R17 and R18 is also connected to the negative terminal of polarized capacitor C6. The positive terminal of polarized capacitor C6 is connected to pin 1. Transistor V3... The emitter of transistor C4 is connected to pin 3. The base of transistor V4 is connected to resistors R18 and R19. Resistor R19 and the emitter of transistor C4 are connected to pin 1. The collector of transistor V4 is connected to resistor R23 and the base of transistor V5 through resistor R21. The collector of transistor V5 is connected to pin 1 through diode V7 and resistor R24. The anode of diode V7 is also connected to pin 2. The emitter of transistor V5 is connected to pin 3.

[0012] The temperature compensation circuit includes resistors R9 to R13 connected in series. Resistors R9 and R13 are respectively connected to the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R10 and R11 is also connected to the oscillation circuit. The contact of resistors R11 and R12 is also connected to the contact between the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R12 and R13 is also connected to pin 3.

[0013] The advantages of this invention are as follows: by directly receiving the displacement process of the displacement sensor through the induction coil, the use of software is reduced, the response is rapid, the voltage signal follows the displacement signal in real time, the back-end circuit can quickly receive and feed back the signal, and it has good debuggability and maintainability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the principle of this utility model. Detailed Implementation

[0015] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0016] A circuit for receiving displacement signals and changing its operating state according to the displacement value includes a displacement sensing circuit, an oscillation circuit, a feedback amplification circuit, a filter circuit, a switching circuit, and a temperature compensation circuit connected between pins 1 and 3. The displacement sensing circuit is sequentially connected to the feedback amplification circuit, the oscillation circuit, and the switching circuit. The positive and negative output terminals of the switching circuit are connected to pins 2 and 3, respectively. The displacement sensing circuit includes a first mutual inductance coil L1 and a second mutual inductance coil L2. The primary side of the first mutual inductance coil L1 is connected in forward series with the primary side of the second mutual inductance coil L2, and the secondary side of the first mutual inductance coil L1 is connected in reverse series with the secondary side of the second mutual inductance coil L2. The unused end of the first mutual inductance coil is connected to pin 1, and the unused end of the second mutual inductance coil L2 is connected to the oscillation circuit. The two ends of the series connection between the secondary side of the first mutual inductance coil L1 and the second mutual inductance coil L2 are connected in parallel with the temperature compensation circuit. Pins 1 and 3 are connected to the positive and negative terminals of a 28V power supply, respectively, and pin 2 is connected to the load. The displacement signal provided by the displacement sensor changes the gap between itself and the magnetic conductor, thereby altering the magnetic flux coupling between the primary and secondary windings, and thus changing the voltage on the secondary winding. When the displacement signal provided by the displacement sensor moves past the midpoint of the displacement sensing circuit, the voltage output by the displacement sensing circuit changes phase by 180°, thereby controlling the switching circuit to turn on and off.

[0017] Furthermore, the oscillation circuit includes a transistor V2. The collector of transistor V2 is connected to the second mutual inductor, the emitter is connected to pin 3 via resistor R25, and the base is connected to resistor R5, capacitor C4, and resistor R6. Resistor R5 is connected to pin 1, and resistor R6 is connected to the anode of diode V11. The cathode of diode V11 is connected to pin 3, and capacitor C4 is connected to the feedback amplifier circuit. The collector of transistor V2 is connected to the primary side of the second mutual inductor and, through capacitor C5, to the base of transistor V3. A frequency signal is generated by the inductance and capacitor C5 on the primary side of the displacement sensing circuit and sent to the base of transistor V3, thereby controlling the switching circuit.

[0018] Furthermore, the feedback amplifier circuit includes a transistor V1. The base of transistor V1 is connected to the output of the displacement sensor circuit through parallel capacitors C2 and C8. The collector is connected to pin 1 through resistor R3 and coupled to the oscillation circuit through capacitor C4. The emitter is connected to pin 3 through parallel capacitor C3 and resistor R4. The feedback process is achieved through the secondary winding in the displacement sensing circuit and coupled to the oscillation circuit through capacitor C4.

[0019] Furthermore, the filter circuit includes a polarized capacitor C1. The positive terminal of the polarized capacitor C1 is connected to pin 1 in sequence through resistors R16 and R26, and the negative terminal is connected to pin 3, forming a Γ-type filter.

[0020] Furthermore, the contacts of resistors R16 and R26 are also connected to the cathode of Zener diode V8, the anode of Zener diode V8 is connected to the cathode of Zener diode V9, and the anode of Zener diode V9 is connected to pin 3.

[0021] Furthermore, the switching circuit includes transistors V3, V4, and V5. The base of transistor V3 is connected to resistor R14 and capacitor C5, respectively. Capacitor C5 is connected to the collector of transistor V2. Resistor R14 is connected to the rear terminal of resistor R16. The collector of transistor V3 is connected to resistors R17 and R18 in sequence. The junction between resistors R17 and R18 is also connected to the negative terminal of polarized capacitor C6. The positive terminal of polarized capacitor C6 is connected to pin 1. The emitter of transistor V3 is connected to pin 3. The base of transistor V4... The collector of transistor V4 is connected to resistors R18 and R19 respectively. Resistor R19 and the emitter of transistor C4 are connected to pin 1. The collector of transistor V4 is connected to resistor R23 and the base of transistor V5 through resistor R21. The collector of transistor V5 is connected to pin 1 through diode V7 and resistor R24. The anode of diode V7 is also connected to pin 2. The emitter of transistor V5 is connected to pin 3. The current pulse travels from the collector of transistor V2 through capacitor C5 to the base of transistor V3 and is detected as a DC signal. This signal is amplified by transistors V4 and V5 to control the operation of the electrical equipment. The electrical equipment is connected between the power supply + (pin 1) and the collector of transistor V5.

[0022] The temperature compensation circuit includes resistors R9 to R13 connected in series. Resistors R9 and R13 are respectively connected to the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R10 and R11 is also connected to the oscillation circuit. The contact of resistors R11 and R12 is also connected to the contact between the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R12 and R13 is also connected to pin 3.

[0023] The displacement sensing circuit of this invention receives the displacement signal provided by the displacement sensor and changes the magnetic flux coupling between the primary and secondary windings, that is, changes the voltage on the secondary winding.

[0024] Switching operating states: The voltage signal transmitted from the displacement sensing circuit to the feedback amplifier circuit is amplified by the feedback amplifier circuit to enable the switching circuit to operate; when the displacement sensor moves past the midpoint of the displacement sensing circuit coil, the voltage phase output by the displacement sensing circuit will change by 180°, causing the switching circuit to stop operating.

[0025] like Figure 1As shown, the displacement sensing circuit has two mutual inductance coils. The first mutual inductance coil is a coil with the same pole, and the second mutual inductance coil is a coil with opposite poles. When the circuit starts working, after supplying a 28V DC power supply voltage to the input terminal (pin 1), the output voltage of the internal displacement sensing circuit is amplified by the feedback amplifier circuit, which then activates the switching circuit (turns on). Subsequently, transistors V4 and V5 conduct in succession, forming a path between the line output terminal (pin 2) and the power supply (pin 3). As the displacement signal provided by the displacement sensor continues to increase, it changes the gap between the sensor and the magnetic conductor, thereby changing the magnetic flux coupling between the primary and secondary windings, i.e., changing the voltage on the secondary winding. When the displacement signal provided by the displacement sensor moves past the midpoint of the displacement sensing circuit, the phase of the voltage output by the displacement sensing circuit changes by 180°. At this time, the voltage output by the displacement sensing circuit is amplified by the feedback amplifier circuit, causing the switching circuit to stop working (turns off). Transistors V4 and V5 are in the cutoff state, and the line output terminal (pin 2) and the power supply (pin 3) do not form a path.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model. Technologies and structures not described in detail in this utility model are all known technologies.

Claims

1. A circuit that receives a displacement signal and changes its operating state according to the displacement value, characterized in that: The system includes a displacement sensing circuit, an oscillation circuit, a feedback amplification circuit, a filter circuit, a switching circuit, and a temperature compensation circuit, all connected between pins 1 and 3. The displacement sensing circuit is sequentially connected to the feedback amplification circuit, the oscillation circuit, and the switching circuit. The positive and negative output terminals of the switching circuit are connected to pins 2 and 3, respectively. The displacement sensing circuit includes a first mutual inductance coil L1 and a second mutual inductance coil L2. The primary side of the first mutual inductance coil L1 is connected in forward series with the primary side of the second mutual inductance coil L2, and the secondary side of the first mutual inductance coil L1 is connected in reverse series with the secondary side of the second mutual inductance coil L2. The unused end of the first mutual inductance coil is connected to pin 1, and the unused end of the second mutual inductance coil L2 is connected to the oscillation circuit. The two ends of the series connection between the secondary side of the first mutual inductance coil L1 and the second mutual inductance coil L2 are connected in parallel with the temperature compensation circuit. Pins 1 and 3 are connected to the positive and negative terminals of a 28V power supply, respectively, and pin 2 is connected to the load.

2. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 1, characterized in that: The oscillation circuit includes a transistor V2. The collector of transistor V2 is connected to the second mutual inductor. The emitter is connected to pin 3 through resistor R25. The base is connected to resistor R5, capacitor C4, and resistor R6 respectively. Resistor R5 is connected to pin 1. Resistor R6 is connected to the anode of diode V11. The cathode of diode V11 is connected to pin 3. Capacitor C4 is connected to the feedback amplifier circuit. The collector of transistor V2 is connected to the primary side of the second mutual inductor and is connected to the base of transistor V3 through capacitor C5.

3. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 2, characterized in that: The feedback amplifier circuit includes a transistor V1. The base of transistor V1 is connected to the output terminal of the displacement sensor circuit through parallel capacitors C2 and C8. The collector is connected to pin 1 through resistor R3 and coupled to the oscillation circuit through capacitor C4. The emitter is connected to pin 3 through parallel capacitor C3 and resistor R4.

4. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 1, characterized in that: The filter circuit includes a polarized capacitor C1. The positive terminal of the polarized capacitor C1 is connected to pin 1 through resistors R16 and R26 in sequence, and the negative terminal is connected to pin 3.

5. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 4, characterized in that: The contacts of resistors R16 and R26 are also connected to the cathode of Zener diode V8, the anode of Zener diode V8 is connected to the cathode of Zener diode V9, and the anode of Zener diode V9 is connected to pin 3.

6. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 1, characterized in that: The switching circuit includes transistors V3, V4, and V5. The base of transistor V3 is connected to resistor R14 and capacitor C5. Capacitor C5 is connected to the collector of transistor V2. Resistor R14 is connected to the rear terminal of resistor R16. The collector of transistor V3 is connected to resistors R17 and R18 in sequence. The junction between resistors R17 and R18 is also connected to the negative terminal of polarized capacitor C6. The positive terminal of polarized capacitor C6 is connected to pin 1. Transistor V3... The emitter of transistor C4 is connected to pin 3. The base of transistor V4 is connected to resistors R18 and R19. Resistor R19 and the emitter of transistor C4 are connected to pin 1. The collector of transistor V4 is connected to resistor R23 and the base of transistor V5 through resistor R21. The collector of transistor V5 is connected to pin 1 through diode V7 and resistor R24. The anode of diode V7 is also connected to pin 2. The emitter of transistor V5 is connected to pin 3.

7. The circuit for receiving displacement signals and changing its operating state according to the displacement value as described in claim 1, characterized in that: The temperature compensation circuit includes resistors R9 to R13 connected in series. Resistors R9 and R13 are respectively connected to the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R10 and R11 is also connected to the oscillation circuit. The contact of resistors R11 and R12 is also connected to the contact between the secondary side of the first mutual inductance coil and the secondary side of the second mutual inductance coil. The contact of resistors R12 and R13 is also connected to pin 3.

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