Laser distance measuring sensor

Abstract

The utility model discloses a laser distance measuring sensor, which comprises an MCU (Microprogrammed Control Unit) controller, and a power supply module, a laser transmitting module, a laser receiving module and a voltage and current analog quantity conversion module which are all connected with the MCU controller, the laser receiving module is used for detecting a reflected signal of a laser signal reflected on a measured object, and the MCU controller is used for calculating a relative distance value of the measured object based on phase delay of the laser signal and the reflected signal and outputting the relative distance value to the voltage and current analog quantity conversion module. According to the invention, the MCU controls a sinusoidal signal with a fixed frequency to continuously modulate light emission of the laser emission module, circuit hardware converts a returned modulation reflection signal into a square wave signal, and the MCU compares pulse filling phases of emitted light and received light and calculates a distance value relative to the distance of a measured object to the driving digital display. And then circuit hardware is controlled to output voltage and current analog quantity and a relay, so that the convenience is improved.

Description

Technical Field

[0001] The utility model relates to the field of laser sensors, in particular to a laser distance measuring sensor. Background Art

[0002] Laser distance measuring sensors use electronic hardware to control a fixed frequency sinusoidal signal through an MCU to continuously modulate the light emission of the laser source. The phase difference generated by the round trip of the modulated laser to the target is converted into a square wave signal through circuit hardware. The MCU compares the pulse filling phase of the emitted light and the received light to calculate the target distance, and then controls the circuit hardware to output the switch quantity / voltage and current analog quantity and relay and supports RS485 communication, which is applicable to many fields. Existing laser distance measuring sensors cannot simulate voltage and current after measuring the distance. Utility Model Content

[0003] The main purpose of the utility model is to provide a laser distance measuring sensor, aiming to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the utility model proposes a laser ranging sensor including an MCU controller and a power module, a laser emitting module, a laser receiving module and a voltage-current analog conversion module all connected to the MCU controller, wherein the laser emitting module is used to generate a laser signal, the laser receiving module is used to detect a reflected signal of the laser signal after being reflected on the object to be measured, and the MCU controller is used to calculate the relative distance value of the object to be measured based on the phase delay between the laser signal and the reflected signal and output it to the voltage-current analog conversion module.

[0005] In one embodiment, the voltage-current analog quantity conversion module includes a voltage analog quantity output interface and a current analog quantity output interface, and both the voltage analog quantity output interface and the current analog quantity output interface are connected to the MCU controller.

[0006] In one embodiment, the power module includes a plurality of first capacitors, second capacitors, third capacitors and fourth capacitors which are arranged in parallel.

[0007] In one embodiment, the laser emission module includes a light emitting diode connected to the MCU controller.

[0008] In one embodiment, the MCU controller is connected to a control module.

[0009] In one embodiment, the laser receiving module includes an NPN transistor, a collector of the NPN transistor is connected to the power module, and an emitter of the NPN transistor is connected to the MCU controller.

[0010] In one embodiment, the laser receiving module further includes a fifth capacitor connected in parallel with the NPN transistor.

[0011] In one embodiment, the laser ranging sensor also includes a push-pull drive module connected to the MCU controller, the push-pull drive module includes two NPN / PNP switch quantity access ports, and the two NPN / PNP switch quantity access ports are respectively connected to a first transient suppression diode and a second transient suppression diode connected to the first transient suppression diode.

[0012] In one embodiment, the laser ranging sensor further includes a first relay and a second relay both connected to the MCU controller.

[0013] In one embodiment, the laser ranging sensor further includes a digital display screen connected to the MCU controller.

[0014] In the technical solution of the utility model, the laser distance sensor includes an MCU controller and a power module, a laser emitting module, a laser receiving module and a voltage and current analog conversion module all connected to the MCU controller, the laser emitting module is used to generate a laser signal, the laser receiving module is used to detect the reflected signal of the laser signal after being reflected on the measured object, and the MCU controller is used to calculate the relative distance value of the measured object based on the phase delay of the laser signal and the reflected signal and output it to the voltage and current analog conversion module. In the present application, the MCU controls the luminescence of the laser emitting module by continuously modulating the sine signal of a fixed frequency, and the returned modulated reflected signal is converted into a square wave signal by the circuit hardware. The MCU compares the pulse filling phase of the emitted light and the received light to calculate the relative distance value of the measured object distance drive digital display, and then controls the circuit hardware to output the voltage and current analog quantity and relay, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 The figure is a schematic diagram of the circuit principle of the laser ranging sensor according to the embodiment of the utility model.

[0017] Explanation of the accompanying drawings: 10, MCU controller; 20, power module; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; 30, laser emission module; 31, light emitting diode; 40, laser receiving module; 41, NPN transistor; 50, voltage and current analog conversion module; 51, voltage analog output interface; 52, current analog output interface; 60, control module; 70, digital display screen; 80, push-pull drive module; 81, NPN / PNP switch quantity access port; 83, first transient suppression diode; 84, second transient suppression diode; 85, first relay; 86, second relay.

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] Furthermore, the technical solutions of the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The utility model provides a laser distance measuring sensor.

[0024] like Figure 1As shown, the laser ranging sensor provided by the embodiment of the utility model includes an MCU controller 10 and a power module 20, a laser emitting module 30, a laser receiving module 40 and a voltage-current analog conversion module 50, all of which are connected to the MCU controller 10. The laser emitting module 30 is used to generate a laser signal, and the laser receiving module 40 is used to detect a reflected signal of the laser signal after being reflected on the object to be measured. The MCU controller 10 is used to calculate the relative distance value of the object to be measured based on the phase delay between the laser signal and the reflected signal and can output it to the voltage-current analog conversion module 50.

[0025] In this embodiment, the laser distance sensor includes an MCU controller 10 and a power module 20, a laser emitting module 30, a laser receiving module 40 and a voltage and current analog conversion module 50, all of which are connected to the MCU controller 10. The laser emitting module 30 is used to generate a laser signal, and the laser receiving module 40 is used to detect the reflected signal of the laser signal after being reflected on the object to be measured. The MCU controller 10 is used to calculate the relative distance value of the object to be measured based on the phase delay of the laser signal and the reflected signal and output it to the voltage and current analog conversion module 50. In the present application, the MCU controls the luminescence of the laser emitting module 30 by continuously modulating the sine signal of a fixed frequency, and the returned modulated reflected signal is converted into a square wave signal by the circuit hardware. The MCU compares the pulse filling phase of the emitted light and the received light to calculate the relative distance value of the distance of the object to be measured to drive the digital display, and then controls the circuit hardware to output the voltage and current analog quantity and the relay, thereby improving the convenience.

[0026] The laser distance measuring sensor further comprises a digital display screen 70 connected to the MCU controller 10 , so the measured relative distance value can be displayed on the digital display screen 70 for the user to view.

[0027] The voltage and current analog quantity conversion module 50 includes a voltage analog quantity output interface 51 and a current analog quantity output interface 52, and the voltage analog quantity output interface 51 and the current analog quantity output interface 52 are both connected to the MCU controller 10. The laser ranging sensor also includes a push-pull drive module 80 connected to the MCU controller 10, and the push-pull drive module 80 includes two NPN / PNP switch quantity access ports 81, and the two NPN / PNP switch quantity access ports 81 are respectively connected with a first transient suppression diode 83 and a second transient suppression diode 84 connected to the first transient suppression diode 83. In this embodiment, the output connection with two-way switch quantity output, voltage and current analog quantity output, and RS485 communication output two-wire pair interface can meet the requirements of multiple industries.

[0028] In the above embodiment, the power module 20 includes a plurality of first capacitors C1, second capacitors C2, third capacitors C3 and fourth capacitors C4 arranged in parallel. In this embodiment, the size and number of capacitors are not limited and can be adjusted as needed. The laser emitting module 30 includes a light emitting diode 31 connected to the MCU controller 10.

[0029] The MCU controller 10 is connected to a control module 60 , and the control module 60 has a plurality of modes for users to adjust.

[0030] The laser receiving module 40 includes an NPN transistor 41, the collector of which is connected to the power module 20, and the emitter of which is connected to the MCU controller 10. The laser receiving module 40 also includes a fifth capacitor connected in parallel with the NPN transistor 41. The laser ranging sensor also includes a first relay 85 and a second relay 86, both of which are connected to the MCU controller 10.

[0031] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A laser ranging sensor, characterized in that: The laser ranging sensor includes an MCU controller and a power module, a laser emitting module, a laser receiving module and a voltage-current analog conversion module all connected to the MCU controller. The laser emitting module is used to generate a laser signal, the laser receiving module is used to detect a reflected signal of the laser signal after being reflected on the object to be measured, and the MCU controller is used to calculate the relative distance value of the object to be measured based on the phase delay between the laser signal and the reflected signal and output it to the voltage-current analog conversion module.

2. The laser ranging sensor according to claim 1, characterized in that: The voltage-current analog quantity conversion module comprises a voltage analog quantity output interface and a current analog quantity output interface, and both the voltage analog quantity output interface and the current analog quantity output interface are connected to the MCU controller.

3. The laser ranging sensor according to claim 1, characterized in that: The power module includes a plurality of first capacitors, second capacitors, third capacitors and fourth capacitors which are arranged in parallel.

4. The laser ranging sensor according to claim 1, characterized in that: The laser emission module includes a light emitting diode connected to the MCU controller.

5. The laser ranging sensor according to claim 4, characterized in that: The MCU controller is connected to a control module.

6. The laser ranging sensor according to claim 1, characterized in that: The laser receiving module comprises an NPN transistor, a collector of the NPN transistor is connected to the power module, and an emitter of the NPN transistor is connected to the MCU controller.

7. The laser ranging sensor according to claim 6, characterized in that: The laser receiving module further includes a fifth capacitor connected in parallel with the NPN transistor.

8. The laser ranging sensor according to claim 1, characterized in that: The laser ranging sensor also includes a push-pull drive module connected to the MCU controller, the push-pull drive module includes two NPN / PNP switch quantity access ports, and the two NPN / PNP switch quantity access ports are respectively connected to a first transient suppression diode and a second transient suppression diode connected to the first transient suppression diode.

9. The laser ranging sensor according to claim 1, characterized in that: The laser ranging sensor also includes a first relay and a second relay both connected to the MCU controller.

10. The laser ranging sensor according to claim 1, characterized in that: The laser ranging sensor also includes a digital display screen connected to the MCU controller.

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