CN212515025U - Light-emitting detection circuit suitable for self-checking of laser range finder - Google Patents
Light-emitting detection circuit suitable for self-checking of laser range finder Download PDFInfo
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- CN212515025U CN212515025U CN202020934511.1U CN202020934511U CN212515025U CN 212515025 U CN212515025 U CN 212515025U CN 202020934511 U CN202020934511 U CN 202020934511U CN 212515025 U CN212515025 U CN 212515025U
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Abstract
The utility model provides a light-emitting detection circuitry suitable for laser range finder self-checking, including MCU minimum system and MCU control circuit, still include light signal detection circuitry, MCU minimum system and MCU control circuit connect gradually, wherein, light signal detection circuitry carries out real-time detection to laser range finder's transmitting module, and produce corresponding digital signal and feed back to MCU minimum system along with the transmitting module light-emitting, MCU minimum system receives and begins the timing through MCU control circuit drive time-recorder after the digital signal, and reasonable in design, and each module and circuit mutually support, the logic is inseparable, and is high-efficient, quick, self-adaptation ability is strong, thereby can improve pulsed laser range finding's precision, reduce the lower problem of range finding precision because of detecting light-emitting signal untimely often causing.
Description
Technical Field
The utility model belongs to the technical field of laser photoelectricity, concretely relates to light-emitting detection circuitry suitable for laser range finder self-checking.
Background
The laser ranging mode is divided into pulse type laser ranging and phase type laser ranging, and the pulse type laser ranging has the advantages of long testing distance and simple signal processing. The working principle of the traditional pulse type laser ranging is as follows: the laser emits an optical signal to the measured target, then receives the optical signal reflected by the target, and calculates the distance of the target by measuring the time of the optical signal passing back and forth.
The pulse type laser ranging mainly comprises a laser emitting module, a laser receiving module, a counting module and a power supply module. The laser emitting module emits laser and starts counting, and when the echo is received and the counting is ended, an effective light emitting detection circuit is needed to detect when the laser emits light. At present, most laser detection circuits in the market have poor detection results, detected signals are different in size and time, and the analog-to-digital conversion speed is low, so that the laser ranging precision is poor.
SUMMERY OF THE UTILITY MODEL
In view of the current light-emitting detection circuitry is relatively poor to the response ability that laser instrument light-emitting detected, the utility model provides a light-emitting detection circuitry suitable for laser range finder self-checking to improve pulsed laser rangefinder's precision, reduce because of detecting the lower problem of range finding precision that light-emitting signal did not reach often and cause.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a light-emitting detection circuit suitable for self-detection of a laser range finder comprises an MCU minimum system, an MCU control circuit and an optical signal detection circuit, wherein the optical signal detection circuit, the MCU minimum system and the MCU control circuit are sequentially connected, the optical signal detection circuit carries out real-time detection on an emitting module of the laser range finder, generates a corresponding digital signal along with light-emitting of the emitting module and feeds the digital signal back to the MCU minimum system, and the MCU minimum system drives a timer to start timing through the MCU control circuit after receiving the digital signal;
the optical signal detection circuit comprises an operational amplifier U1, a photodiode D1, a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6 and a capacitor C1, wherein a pin 1 of the operational amplifier U1 is connected to a MCU minimum system through a resistor R4, a pin 4 of the operational amplifier U1 is grounded, a pin 3 of the operational amplifier U1 is divided into two branches through the resistor R5, one branch is grounded through a resistor R6, the other branch is connected with a driving voltage through the photodiode D1, the resistor R5 is directly connected with the anode of the photodiode D1, a pin 8 of the operational amplifier U1 is connected to a power supply voltage, a resistor R2 is connected between the pin 8 and the pin 2 of the operational amplifier U1 in series, and two ends of the resistor R2 are connected with the resistor R1 and the capacitor C1 respectively and then are grounded together.
Further, the MCU minimum system adopts an STM32 series single chip microcomputer.
Furthermore, the 5 pin and the 6 pin of the MCU minimum system are connected with the crystal oscillator Y1 together and then grounded.
Furthermore, the 5 pin and the 6 pin of the MCU minimum system are also connected with the capacitor C4 and the capacitor C3 respectively and then grounded.
Furthermore, a pin 7 of the MCU minimum system is a reset port, and a pin 1 of the MCU minimum system is used to connect to a power supply voltage.
Further, the power supply voltage is +3.3V, and the driving voltage is + 20V.
Furthermore, the MCU minimum system is respectively connected with a debugging interface and an ARM decoupling capacitor.
Further, the model of the operational amplifier U1 is LM2904DR 2G.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an optical signal detection circuitry carries out real-time detection to laser rangefinder's transmitting module, and produce corresponding digital signal and feed back to MCU minimum system along with the transmitting module light-emitting, MCU minimum system receives behind the digital signal and begins the timing through MCU control circuit drive time-recorder, and reasonable in design, and each module and circuit mutually support, the logic is inseparable, the response is high-efficient, fast, self-adaptability is strong, thereby can improve pulsed laser rangefinder's precision, reduce because of detecting the lower problem of range finding precision that the light-emitting signal is not in time to cause.
Drawings
FIG. 1 is a schematic block diagram of a light detection circuit suitable for self-detection of a laser rangefinder;
fig. 2 is a schematic circuit diagram of the optical signal detection circuit of the present invention;
fig. 3 is a schematic circuit diagram of the MCU minimum system of the present invention.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will combine the drawings in the present invention to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.
The utility model provides a light-emitting detection circuitry suitable for laser range finder self-checking, as shown in figure 1, including MCU minimum system and MCU control circuit, still include optical signal detection circuitry, MCU minimum system and MCU control circuit connect gradually, wherein, optical signal detection circuitry carries out real-time detection to laser range finder's emission module to produce corresponding digital signal and feed back to MCU minimum system along with the emission module light-emitting, MCU minimum system is the circuit core, start timing through MCU control circuit drive time-recorder after MCU minimum system receives digital signal. The utility model discloses light-emitting detection circuitry is the important circuit that improves laser rangefinder range finding precision, and its reliability that detects light-emitting signal is stronger, and is just bigger to the help that promotes the range finding precision.
As shown in fig. 2, the optical signal detection circuit includes an operational amplifier U1, a photodiode D1, a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6, and a capacitor C1, where a pin 1 of the operational amplifier U1 is connected to the MCU minimum system through a resistor R4, a pin 4 of the operational amplifier U1 is grounded, a pin 3 of the operational amplifier U1 is divided into two branches through the resistor R5, one of the two branches is grounded through the resistor R6, the other branch is connected to a driving voltage through the photodiode D1, the resistor R5 is directly connected to the anode of the photodiode D1, a pin 8 of the operational amplifier U1 is connected to a supply voltage, a resistor R2 is connected in series between the pin 8 and the pin 2 of the operational amplifier U1, and both ends of the resistor R2 are connected to the resistor R1 and the capacitor C1 respectively and then are grounded together.
Further optimizing the scheme, as shown in fig. 3, the MCU minimum system employs an STM32 series single chip microcomputer, and in this embodiment, an STM32F101CBT6 is specifically employed.
Further optimizing the scheme, the 5 pin and the 6 pin of the MCU minimum system are connected with the crystal oscillator Y1 together and then grounded.
Further optimizing the scheme, the 5 pin and the 6 pin of the MCU minimum system are respectively connected with the capacitor C4 and the capacitor C3 and then grounded.
Further optimizing this scheme, 7 feet of MCU minimum system are the port that resets, and 1 foot of MCU minimum system is used for connecting supply voltage.
Further optimizing the scheme, the power supply voltage is +3.3V, and the driving voltage is + 20V.
Further optimizing the scheme, the MCU minimum system is respectively connected with a debugging interface and an ARM decoupling capacitor.
Further optimizing the scheme, the model of the operational amplifier U1 is LM2904DR 2G.
When the laser range finder is used for measuring, the light-emitting detection is not timely, so that the time calculation error is large, the precision of a target distance value is greatly influenced, and even light-emitting signals cannot be detected seriously, so that the range finder loses the most basic range finding function. And the utility model provides a light-emitting detection circuitry carries out real-time detection to laser rangefinder's transmitting module through light signal detection circuitry to produce corresponding digital signal and feed back to MCU minimum system along with the transmitting module light-emitting, MCU minimum system receives behind the digital signal through MCU control circuit drive time-recorder and begins the timing, reasonable in design, the good reliability, the degree of accuracy is high, can improve whole range finding precision.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a light-emitting detection circuitry suitable for laser rangefinder self-checking, includes MCU minimum system and MCU control circuit, its characterized in that: the laser range finder comprises a laser range finder, and is characterized by further comprising an optical signal detection circuit, wherein the optical signal detection circuit, the MCU minimum system and the MCU control circuit are sequentially connected, the optical signal detection circuit is used for detecting a transmitting module of the laser range finder in real time, generating a corresponding digital signal along with the light emitted by the transmitting module and feeding the digital signal back to the MCU minimum system, and the MCU minimum system drives a timer to start timing through the MCU control circuit after receiving the digital signal;
the optical signal detection circuit comprises an operational amplifier U1, a photodiode D1, a resistor R1, a resistor R2, a resistor R4, a resistor R5, a resistor R6 and a capacitor C1, wherein a pin 1 of the operational amplifier U1 is connected to a MCU minimum system through a resistor R4, a pin 4 of the operational amplifier U1 is grounded, a pin 3 of the operational amplifier U1 is divided into two branches through the resistor R5, one branch is grounded through a resistor R6, the other branch is connected with a driving voltage through the photodiode D1, the resistor R5 is directly connected with the anode of the photodiode D1, a pin 8 of the operational amplifier U1 is connected to a power supply voltage, a resistor R2 is connected between the pin 8 and the pin 2 of the operational amplifier U1 in series, and two ends of the resistor R2 are connected with the resistor R1 and the capacitor C1 respectively and then are grounded together.
2. A light-emitting detection circuit suitable for self-detection of a laser range finder as claimed in claim 1, wherein: and the MCU minimum system adopts an STM32 series single chip microcomputer.
3. A light-emitting detection circuit suitable for self-detection of a laser range finder as claimed in claim 2, wherein: and 5 pins and 6 pins of the MCU minimum system are connected with a crystal oscillator Y1 together and then grounded.
4. A light-emitting detection circuit suitable for self-detection of a laser range finder as claimed in claim 3, wherein: and the 5 pin and the 6 pin of the MCU minimum system are also connected with a capacitor C4 and a capacitor C3 respectively and then grounded.
5. A light-emitting detection circuit suitable for self-detection of a laser range finder according to claim 4, wherein: and a pin 7 of the MCU minimum system is a reset port, and a pin 1 of the MCU minimum system is used for connecting power supply voltage.
6. A light-emitting detection circuit suitable for self-detection of a laser range finder according to claim 5, wherein: the power supply voltage is +3.3V, and the driving voltage is + 20V.
7. A light-emitting detection circuit suitable for self-detection of a laser range finder according to claim 6, wherein: and the MCU minimum system is respectively connected with a debugging interface and an ARM decoupling capacitor.
8. A light-emitting detection circuit suitable for self-detection of a laser range finder as claimed in claim 7, wherein: the model of the operational amplifier U1 is LM2904DR 2G.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020934511.1U CN212515025U (en) | 2020-05-28 | 2020-05-28 | Light-emitting detection circuit suitable for self-checking of laser range finder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020934511.1U CN212515025U (en) | 2020-05-28 | 2020-05-28 | Light-emitting detection circuit suitable for self-checking of laser range finder |
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| CN212515025U true CN212515025U (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522017A (en) * | 2020-05-28 | 2020-08-11 | 洛阳顶扬光电技术有限公司 | Light-emitting detection circuit suitable for self-checking of laser range finder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111522017A (en) * | 2020-05-28 | 2020-08-11 | 洛阳顶扬光电技术有限公司 | Light-emitting detection circuit suitable for self-checking of laser range finder |
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