Search

CN-224202566-U - Laser receiving circuit and electronic equipment

CN224202566UCN 224202566 UCN224202566 UCN 224202566UCN-224202566-U

Abstract

The application relates to the technical field of laser receiving and discloses a laser receiving circuit and electronic equipment, wherein the laser receiving circuit comprises a laser receiver, a switch conversion module and a comparison operational amplifier module, the switch conversion module is respectively connected with the laser receiver and the comparison operational amplifier module and comprises a first conversion branch and a second conversion branch which respectively support different resistance access, the laser receiver is used for receiving a laser illumination signal and converting the laser illumination signal through the first conversion branch to obtain a first voltage signal input to the comparison operational amplifier module, the second conversion branch is used for providing a second voltage signal input to the comparison operational amplifier module, and the comparison operational amplifier module is used for outputting a level signal for indicating laser receiving when the first voltage signal is larger than the second voltage signal. The laser receiving circuit can detect laser illumination signals in different illumination scenes, meets the application requirements of multiple products, reduces the repeated design and management of multiple circuits, and reduces the maintenance cost.

Inventors

  • SHU CAN

Assignees

  • 深圳市优必选科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250523

Claims (10)

  1. 1. The laser receiving circuit is characterized by comprising a laser receiver, a switch conversion module and a comparison operational amplifier module; The switch conversion module is respectively connected with the laser receiver and the comparison operational amplifier module and comprises a first conversion branch and a second conversion branch which respectively support different resistance access; the laser receiver is used for receiving a laser illumination signal and converting the laser illumination signal through the first conversion branch to obtain a first voltage signal input to the comparison operational amplifier module; The second conversion branch is used for providing a second voltage signal input to the comparison operational amplifier module; The comparison operational amplifier module is used for outputting a level signal for indicating laser receiving when the first voltage signal is larger than the second voltage signal.
  2. 2. The laser receiving circuit according to claim 1, wherein the first switching branch includes a plurality of first switching access units arranged in parallel, and the second switching branch includes a plurality of second switching access units arranged in parallel; The first parallel nodes of the first switch access units are respectively connected with the laser receiver and the comparison operational amplifier module, and the second parallel nodes of the first switch access units are grounded; and the first parallel nodes of the second switch access units are connected with a power supply, and the second parallel nodes of the second switch access units are connected with the comparison operational amplifier module.
  3. 3. The laser receiving circuit according to claim 2, wherein at least one of the switch-in units is turned on in each of the switching branches.
  4. 4. The laser receiving circuit according to claim 2, wherein each of the switch-in units includes an in-resistance and a switch arranged in series; when the switch is in a conducting state, the access resistor is in an access state; When the switch is in an off state, the switch-in resistor is in a non-switch-in state.
  5. 5. The laser receiving circuit according to claim 1, wherein the respective switch states in each of the switching branches are configured according to the type of lighting environment scene in which the circuit is located.
  6. 6. The laser receiving circuit of claim 1, wherein the comparing op-amp module comprises a comparator, a feedback resistor, a first matching resistor, and a second matching resistor; The non-inverting input end of the comparator is connected with the first end of the first matching resistor, the inverting input end of the comparator is connected with the first end of the second matching resistor, the second end of the first matching resistor is connected with the laser receiver, and the second end of the second matching resistor is grounded; And a first end of the feedback resistor is connected with the non-inverting input end of the comparator, and a second end of the feedback resistor is connected with the output end of the comparator.
  7. 7. The laser receiving circuit according to claim 6, wherein the comparing op-amp module further comprises an output resistor; the output end of the comparator is connected with the output resistor.
  8. 8. The laser receiving circuit according to claim 6, wherein the comparator is an in-phase hysteresis comparator.
  9. 9. An electronic device comprising a laser light emitting source and a laser light receiving circuit as claimed in any one of claims 1 to 8.
  10. 10. The electronic device of claim 9, wherein the laser light emitting source is a red laser light emitting source.

Description

Laser receiving circuit and electronic equipment Technical Field The present application relates to the field of laser receiving technologies, and in particular, to a laser receiving circuit and an electronic device. Background The laser receiving circuit is a circuit that converts a received laser signal into an electrical signal and outputs a level signal when a laser is detected. The core function of the system is to capture laser signals and output a definite high-low level signal after signal processing for triggering a subsequent control logic or an alarm system. The existing laser receiving processing circuit designs in the market only design a set of solidified resistance value circuit, the design can only detect the laser illuminance in a certain range, and the design has certain limitation, and when the environmental light difference of the place or the place is too large, the product cannot work normally, so that a lot of erroneous judgment is caused. Disclosure of utility model In view of this, the embodiment of the application provides a laser receiving circuit and an electronic device, which can effectively solve the problem that the application of multiple scenes cannot be flexibly adapted. In a first aspect, an embodiment of the present application provides a laser receiving circuit, including a laser receiver, a switch conversion module, and a comparison operational amplifier module; The switch conversion module is respectively connected with the laser receiver and the comparison operational amplifier module and comprises a first conversion branch and a second conversion branch which respectively support different resistance access; the laser receiver is used for receiving a laser illumination signal and converting the laser illumination signal through the first conversion branch to obtain a first voltage signal input to the comparison operational amplifier module; The second conversion branch is used for providing a second voltage signal input to the comparison operational amplifier module; The comparison operational amplifier module is used for outputting a level signal for indicating laser receiving when the first voltage signal is larger than the second voltage signal. In a first possible embodiment of the first aspect, the first switching branch comprises a plurality of first switch-in units arranged in parallel, and the second switching branch comprises a plurality of second switch-in units arranged in parallel; The first parallel nodes of the first switch access units are respectively connected with the laser receiver and the comparison operational amplifier module, and the second parallel nodes of the first switch access units are grounded; and the first parallel nodes of the second switch access units are connected with a power supply, and the second parallel nodes of the second switch access units are connected with the comparison operational amplifier module. In a second possible embodiment of the first aspect, at least one of the switch-on units is switched on in each of the switching branches. In a third possible embodiment of the first aspect, each of the switch-on units comprises a switch-on resistor and a switch arranged in series; when the switch is in a conducting state, the access resistor is in an access state; When the switch is in an off state, the switch-in resistor is in a non-switch-in state. In a fourth possible embodiment of the first aspect, the respective switch state in each of the switching branches is configured according to the type of lighting environment scene in which the circuit is located. In a fifth possible embodiment of the first aspect, the comparing op-amp module includes a comparator, a feedback resistor, a first matching resistor, and a second matching resistor; The non-inverting input end of the comparator is connected with the first end of the first matching resistor, the inverting input end of the comparator is connected with the first end of the second matching resistor, the second end of the first matching resistor is connected with the laser receiver, and the second end of the second matching resistor is grounded; And a first end of the feedback resistor is connected with the non-inverting input end of the comparator, and a second end of the feedback resistor is connected with the output end of the comparator. In a sixth possible embodiment of the first aspect, the comparing op-amp module further includes an output resistor; the output end of the comparator is connected with the output resistor. In a seventh possible embodiment of the first aspect, the comparator is an in-phase hysteresis comparator. In a second aspect, an embodiment of the present application provides an electronic device, including a laser emission source and the above-mentioned laser receiving circuit. In a first possible embodiment of the second aspect, the laser emitting source is a red laser emitting source. The embodiment of the application has the following benefici