Non-polar high-precision rapid detection photoreceptor

Abstract

The utility model relates to a non-polar high-precision rapid detection photoreceptor, which comprises a non-polar voltage input circuit, an adder connected with the non-polar voltage input circuit, a photosensitive detection circuit connected with the adder, and a galvanostat and a current detection circuit which are connected with the photosensitive detection circuit, the galvanostat is connected with the current detection circuit; the non-polar voltage input circuit is used for automatically identifying and adapting to the positive and negative polarities of a power supply and ensuring the correct flow direction of input voltage; the galvanostat is used for stably controlling the current in the circuit and ensuring that the current is kept constant under various load changes; and the photosensitive detection circuit is used for detecting and measuring light intensity or illumination change and converting a light signal into an electric signal. According to the utility model, only two input lines are needed, and circuit control can be carried out by directly detecting input current more quickly and simply.

Description

Technical Field

[0001] This utility model relates to the field of photosensor technology, and in particular to a non-polar, high-precision, fast-detection photosensor. Background Technology

[0002] Traditional photosensors detect signals by taking a voltage input and then outputting a signal through another line. This multiple input / output lines lead to significant signal interference. Summary of the Invention

[0003] The purpose of this invention is to provide a non-polar, high-precision, fast-detection photosensor that can solve or at least alleviate one or more of the problems mentioned above and other issues existing in the prior art.

[0004] To achieve the above objectives, this utility model provides a non-polar, high-precision, fast-detection photosensor, wherein the photosensor comprises:

[0005] A non-polar voltage input circuit, an adder connected to the non-polar voltage input circuit, a photosensitive detection circuit connected to the adder, and a constant current device and a current detection circuit connected to the photosensitive detection circuit, wherein the constant current device is connected to the current detection circuit.

[0006] The non-polar voltage input circuit is used to automatically identify and adapt to the positive and negative polarities of the power supply, ensuring the correct direction of the input voltage flow; the constant current device stably controls the current in the circuit, ensuring that the current remains constant under various load changes; the photosensitive detection circuit is used to detect and measure light intensity or changes in illumination, converting the light signal into an electrical signal.

[0007] In the non-polarity high-precision fast detection photosensitive sensor described above, the non-polarity voltage input circuit includes switching diode D1 and switching diode D2. The pin of switching diode D1 is connected to an external power supply. The negative terminal of switching diode D1 is connected to the negative terminals of diode VS2, switching diode D2, and one end of capacitor C4. The positive terminal of switching diode D1 is connected to the positive terminals of diode VS2, switching diode D2, and the other end of capacitor C4.

[0008] In the non-polarity, high-precision, fast-detection photosensor described above, the adder includes operational amplifiers containing pins 1 and 2 of chip U1, pin 3 of chip U1, and chip U2. Chip U2 is a Zener diode. Pin 1 of chip U1 is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R1 is connected to pin 2 of chip U1 and one end of resistor R5. The other end of resistor R5 is grounded. The other end of resistor R2 is connected to pin 5 of chip U2 and one end of resistor R8. The other end of resistor R8 is connected to the photosensor detection circuit. Pin 3 of chip U1 is connected to one end of capacitor C3, the negative terminal of chip U2, and one end of resistor R3. The other end of capacitor C3 and the positive terminal of chip U2 are grounded. The other end of resistor R3 is connected to capacitor C1 and a 24V power supply. The other end of capacitor C1 is grounded. The 24V power supply is connected to pin 8 of chip U1, and pin 4 of chip U1 is grounded.

[0009] In the non-polarity high-precision fast detection photosensitive sensor described above, the photosensitive detection circuit includes a light-emitting diode LED2. The positive terminal of the photosensitive diode LED2 is connected to one end of resistor R13, one end of resistor R11, one end of resistor R9, one end of capacitor C2, and the other end of resistor R8. The other ends of resistor R13, resistor R11, resistor R9, and capacitor C2 are grounded. The negative terminal of the photosensitive diode LED2 is connected to pin 1 of chip U1.

[0010] In the non-polarity, high-precision, fast-detection photosensor described above, the constant current device includes an operational amplifier containing pins 5, 6, and 7 of chip U1. Pin 5 of chip U1 is connected to one end of resistor R6. The other end of resistor R6 is connected to one end of resistor R12 and the other end of capacitor C4. The other end of resistor R12 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of resistor R7, the anode of diode VS2, and pin 6 of chip U1. The other end of resistor R7 is connected to the emitter of transistor Q1. The collector of transistor Q1 is connected to one end of capacitor C4. The base of transistor Q1 is connected to the cathode of diode VS1 and one end of resistor R4. The other end of resistor R4 is connected to pin 7 of chip U1.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] According to this novel non-polar, high-precision, fast-detection photosensor, rapid detection requires only two input lines, enabling faster and simpler direct detection of input current for circuit control. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the non-polar, high-precision, fast-detection photosensor of this utility model.

[0014] Figure 2 This is a schematic diagram of the circuit structure of the non-polar, high-precision, fast-detection photosensor of this utility model.

[0015] In the diagram: 1. Non-polar voltage input circuit; 2. Adder; 3. Photosensitive detection circuit; 4. Constant current device; 5. Current detection circuit. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that in the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," and similar words used in the description of this utility model do not indicate any order, quantity, or importance, but are only used to distinguish different components, and therefore should not be construed as limiting this utility model.

[0018] Furthermore, it should be understood that, for ease of description, the dimensions of the individual components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0020] Figure 1 This is an overall structural diagram of the non-polar, high-precision, fast-detection photosensor of this utility model. The diagram shows the non-polar voltage input circuit 1, adder 2, photosensor detection circuit 3, constant current circuit 4, and current detection circuit 5 of the non-polar, high-precision, fast-detection photosensor.

[0021] like Figure 1-2 As shown, the non-polar voltage input circuit is connected to the adder, the adder is connected to the photosensitive detection circuit, the photosensitive detection circuit is connected to the constant current device and the current detection circuit, and the constant current device is connected to the circuit detection circuit.

[0022] Specifically, the non-polar voltage input circuit is used to automatically identify and adapt to the positive and negative polarities of the power supply, ensuring the correct direction of the input voltage flow; the constant current device stably controls the current in the circuit, ensuring that the current remains constant under various load changes; the photosensitive detection circuit is used to detect and measure light intensity or changes in illumination, converting the light signal into an electrical signal.

[0023] Furthermore, the non-polar voltage input circuit includes switching diodes D1 and D2. The pin of switching diode D1 is connected to the external power supply. The negative terminal of switching diode D1 is connected to the negative terminals of diode VS2, switching diode D2, and one end of capacitor C4. The positive terminal of switching diode D1 is connected to the positive terminals of diode VS2, switching diode D2, and the other end of capacitor C4.

[0024] In this configuration, pin 1 of the switching diode D1 is the positive terminal, pin 2 is the negative terminal, and pin 3 is connected to the power supply. Similarly, pin 1 of the switching diode D2 is the positive terminal, pin 2 is the negative terminal, and pin 3 is connected to the power supply.

[0025] Furthermore, the adder includes operational amplifiers located at pins 1, 2, and 3 of chip U1, and chip U2, which is a Zener diode. Pin 1 of chip U1 is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R1 is connected to pin 2 of chip U1 and one end of resistor R5. The other end of resistor R5 is grounded. The other end of resistor R2 is connected to pin 5 of chip U2 and one end of resistor R8. The other end of resistor R8 is connected to the photosensitive detection circuit. Pin 3 of chip U1 is connected to one end of capacitor C3, the negative terminal of chip U2, and one end of resistor R3. The other end of capacitor C3 and the positive terminal of chip U2 are grounded. The other end of resistor R3 is connected to capacitor C1 and the 24V power supply. The other end of capacitor C1 is grounded. The 24V power supply is connected to pin 8 of chip U1, and pin 4 of chip U1 is grounded.

[0026] Furthermore, the photosensitive detection circuit includes a light-emitting diode LED2. The positive terminal of the photosensitive diode LED2 is connected to one end of resistor R13, one end of resistor R11, one end of resistor R9, one end of capacitor C2, and the other end of resistor R8. The other ends of resistor R13, resistor R11, resistor R9, and capacitor C2 are grounded. The negative terminal of the photosensitive diode LED2 is connected to pin 1 of chip U1.

[0027] Furthermore, the constant current device includes the operational amplifier containing pins 5, 6, and 7 of chip U1. Pin 5 of chip U1 is connected to one end of resistor R6. The other end of resistor R6 is connected to one end of resistor R12 and the other end of capacitor C4. The other end of resistor R12 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of resistor R7, the positive terminal of diode VS2, and pin 6 of chip U1. The other end of resistor R7 is connected to the emitter of transistor Q1. The collector of transistor Q1 is connected to one end of capacitor C4. The base of transistor Q1 is connected to the negative terminal of diode VS1 and one end of resistor R4. The other end of resistor R4 is connected to pin 7 of chip U1.

[0028] Specifically, after the input passes through two BAV99 diodes (switching diodes D1 and D2), the input polarity issue is eliminated. The operational amplifiers at pins 1, 2, and 3 of chip U1, along with chip U2, form an adder to obtain a precise 5V. Changes in light intensity cause changes in the voltage across resistors R9, R11, and R13. Consequently, the voltage at pins 5 and 6 of chip U1 also changes. Simultaneously, the current in the constant current circuit formed by pins 5, 6, and 7 of chip U1 changes. Thus, the input current changes accordingly, and the microcontroller only needs to detect the input current value to perform control.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-polar, high-precision, fast-detection photosensor, characterized in that, The circuit includes a non-polar voltage input circuit (1), an adder (2) connected to the non-polar voltage input circuit (1), a photosensitive detection circuit (3) connected to the adder (2), a constant current device (4) and a current detection circuit (5) connected to the photosensitive detection circuit (3). The constant current device (4) is connected to the current detection circuit (5). The non-polar voltage input circuit (1) is used to automatically identify and adapt to the positive and negative polarities of the power supply to ensure the correct direction of the input voltage. The constant current device (4) stably controls the current in the circuit to ensure that the current remains constant under various load changes. The photosensitive detection circuit (3) is used to detect and measure the light intensity or light illumination changes and convert the light signal into an electrical signal.

2. The non-polar, high-precision, fast-detection photosensor according to claim 1, characterized in that, The non-polar voltage input circuit (1) includes a switching diode D1 and a switching diode D2. The pin of the switching diode D1 is connected to an external power supply. The negative terminal of the switching diode D1 is connected to the negative terminal of diode VS2, the negative terminal of the switching diode D2, and one end of capacitor C4. The positive terminal of the switching diode D1 is connected to the positive terminal of diode VS2, the positive terminal of the switching diode D2, and the other end of capacitor C4.

3. The non-polar, high-precision, fast-detection photosensor according to claim 2, characterized in that, The adder (2) includes the operational amplifiers where pins 1 and 2 and pin 3 of chip U1 are located, and chip U2. Chip U2 is a Zener diode. Pin 1 of chip U1 is connected to one end of resistor R2 and one end of resistor R1. The other end of resistor R1 is connected to pin 2 of chip U1 and one end of resistor R5. The other end of resistor R5 is grounded. The other end of resistor R2 is connected to pin 5 of chip U2 and one end of resistor R8. The other end of resistor R8 is connected to the photosensitive detection circuit. Pin 3 of chip U1 is connected to one end of capacitor C3, the negative terminal of chip U2, and one end of resistor R3. The other end of capacitor C3 and the positive terminal of chip U2 are grounded. The other end of resistor R3 is connected to capacitor C1 and a 24V power supply. The other end of capacitor C1 is grounded. The 24V power supply is connected to pin 8 of chip U1. Pin 4 of chip U1 is grounded.

4. A non-polar, high-precision, fast-detection photosensor according to claim 2 or 3, characterized in that, The photosensitive detection circuit (3) includes a light-emitting diode LED2. The positive terminal of the photosensitive diode LED2 is connected to one end of resistor R13, one end of resistor R11, one end of resistor R9, one end of capacitor C2, and the other end of resistor R8. The other ends of resistor R13, resistor R11, resistor R9, and capacitor C2 are grounded. The negative terminal of the photosensitive diode LED2 is connected to pin 1 of chip U1.

5. A non-polar, high-precision, fast-detection photosensor according to claim 2 or 3, characterized in that, The constant current device (4) includes an operational amplifier containing pins 5, 6, and 7 of chip U1. Pin 5 of chip U1 is connected to one end of resistor R6. The other end of resistor R6 is connected to one end of resistor R12 and the other end of capacitor C4. The other end of resistor R12 is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of resistor R7, the positive terminal of diode VS2, and pin 6 of chip U1. The other end of resistor R7 is connected to the emitter of transistor Q1. The collector of transistor Q1 is connected to one end of capacitor C4. The base of transistor Q1 is connected to the negative terminal of diode VS1 and one end of resistor R4. The other end of resistor R4 is connected to pin 7 of chip U1.

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