CN209946386U - Laser diode range finder suitable for extreme conditions - Google Patents
Laser diode range finder suitable for extreme conditions Download PDFInfo
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- CN209946386U CN209946386U CN201920504877.2U CN201920504877U CN209946386U CN 209946386 U CN209946386 U CN 209946386U CN 201920504877 U CN201920504877 U CN 201920504877U CN 209946386 U CN209946386 U CN 209946386U
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Abstract
The utility model provides a laser diode distance measuring machine suitable for extreme conditions, the laser emitting module in the utility model comprises a laser diode and a driving circuit, wherein, the laser diode is used as the light source of the laser diode distance measuring machine, the driving circuit is used for driving the laser emitting module to emit laser pulse signals, the laser emitting module is also provided with a temperature detecting module for detecting the temperature of the laser diode, the temperature detecting module feeds back the detected temperature signals to a control and information processing circuit component, the control and information processing circuit component is used for receiving distance measuring instructions sent by an upper computer and controlling the driving circuit to work after receiving the temperature signals sent by the temperature detecting module, the laser diode is ensured to emit the laser pulse signals under the premise of proper temperature, thereby the laser diode in the utility model is accurately locked in the required wave band range, the reliability and the effectiveness of the distance measuring performance of the laser distance measuring machine are greatly improved.
Description
Technical Field
The utility model belongs to laser rangefinder field, concretely relates to laser diode distancer suitable for extreme condition.
Background
A laser rangefinder is an instrument that accurately measures the distance to a target (also called laser rangefinder) using laser light. The laser range finder has the advantages of simple operation, high measurement precision, long working distance, strong anti-interference capability and the like, and is widely applied to military affairs and civil affairs. The laser wavelength commonly used for distance measurement in the market is generally selected according to optical characteristics such as strong atmospheric transmittance and eye safety, and the commonly used central wavelength is 905nm, 1064nm, 1550nm and the like. However, under extreme conditions, the central wavelength of the laser emitted by the laser diode drifts with the change of temperature, so that the optical receiving system with the narrow-band filtering effect cannot receive the laser echo with the corresponding wavelength, and communication obstruction is caused; however, an optical receiving system with a narrow-band filtering effect is not needed, the influence of sunlight on the distance measuring machine is increased, and the distance measuring performance of the laser distance measuring machine is reduced. Therefore, under the condition of extreme temperature, the distance measuring performance of the laser distance measuring machine in the market is not high, and even the laser distance measuring machine cannot work normally. Therefore, it is important for the laser rangefinder to ensure that the laser diode emits laser light at a constant temperature or within a suitable temperature range.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a laser diode distancer suitable for extreme condition for the accurate locking of laser diode is within requiring the wave band scope, great improvement laser diode distancer range finding performance reliability and validity.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a laser diode distance measuring machine suitable for extreme conditions comprises a laser emitting module, a laser receiving module, an optical subsystem and an electrical subsystem, wherein the optical subsystem comprises an emitting antenna and a receiving antenna, the electrical subsystem comprises a control and information processing circuit component, a power supply and a temperature control component, the laser diode distance measuring machine is connected with an upper computer and is used for carrying out laser distance measurement on a target object, and the laser emitting module comprises a laser diode and a driving circuit; the laser diode is used as a light source of the laser diode distance measuring machine, the driving circuit is used for driving the laser emitting module to emit laser pulse signals, the laser emitting module is also internally provided with a temperature detecting module used for detecting the temperature of the laser diode, and the temperature detecting module feeds the detected temperature signals back to the control and information processing circuit component;
the upper computer is used for sending a distance measuring instruction;
the power supply and temperature control assembly is used for supplying power to the control and information processing circuit assembly, the laser emitting module and the laser receiving module;
the transmitting antenna is used for projecting the laser pulse signal transmitted by the laser transmitting module to a target object;
the receiving antenna is used for receiving the echo laser pulse signal reflected by the target object and converging the echo laser pulse signal to the laser receiving module;
the laser receiving module is used for converting the echo laser pulse signal into an electric signal;
the control and information processing circuit component is used for receiving the distance measuring instruction sent by the upper computer, controlling the driving circuit to work after receiving the temperature signal sent by the temperature detection module and ensuring that the laser diode emits a laser pulse signal under the premise of proper temperature; the control and information processing circuit component is also used for processing the laser pulse signal and the echo laser pulse signal to obtain the distance information of the target object, and transmitting the distance information to an upper computer through a communication interface to finish laser ranging;
the power supply and temperature control assembly is respectively electrically connected with the control and information processing circuit assembly, the laser emitting module and the laser receiving module to realize power supply, the output end of the upper computer is sequentially connected with the power supply and temperature control assembly, the laser emitting module and the transmitting antenna, and the input end of the upper computer is sequentially connected with the control and information processing circuit assembly, the laser receiving module and the receiving antenna.
Further, the laser receiving module comprises an avalanche diode and a receiving circuit.
Compared with the prior art, the beneficial effects of the utility model are that: the laser emission module in the utility model comprises a laser diode and a drive circuit, wherein the laser diode is used as the light source of the laser diode distance measuring machine, the drive circuit is used for driving the laser emission module to emit laser pulse signals, the laser emission module is also provided with a temperature detection module for detecting the temperature of the laser diode, the temperature detection module feeds back the detected temperature signals to a control and information processing circuit component, the control and information processing circuit component is used for receiving distance measuring instructions sent by an upper computer and controlling the drive circuit to work after receiving the temperature signals sent by the temperature detection module, the laser diode is ensured to emit the laser pulse signals under the premise of proper temperature, thereby make the utility model provides a laser diode accurate locking is within requiring the wave band scope, great improvement laser range finder range finding performance reliability and validity.
Drawings
Fig. 1 is a schematic block diagram 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.
A laser diode distance measuring machine suitable for extreme conditions is disclosed as figure 1, and comprises a laser emitting module, a laser receiving module, an optical subsystem and an electrical subsystem, wherein the optical subsystem comprises an emitting antenna and a receiving antenna, the electrical subsystem comprises a control and information processing circuit component, a power supply and a temperature control component, the laser diode distance measuring machine is connected with an upper computer and is used for carrying out laser distance measurement on a target object, and the laser emitting module comprises a laser diode and a driving circuit; the following is a detailed description of the various components of the present invention:
the laser diode is used as a light source of the laser diode distance measuring machine, the driving circuit is used for driving the laser emitting module to emit laser pulse signals, the laser emitting module is also internally provided with a temperature detecting module used for detecting the temperature of the laser diode, and the temperature detecting module feeds the detected temperature signals back to the control and information processing circuit component; the utility model discloses design to solving laser diode and can taking place the temperature drift problem, adopt the semiconductor thermoelectric refrigerator to carry out the method of control to the laser diode temperature in the laser emission module, designed the temperature detection module who has high sampling precision and quick response speed with thermoelectric refrigerator as the core for laser diode accuracy locking is within the required wave band scope, great improvement laser range finder range finding performance reliability and validity;
the upper computer is used for sending a distance measuring instruction;
the power supply and temperature control assembly is used for supplying power to the control and information processing circuit assembly, the laser emitting module and the laser receiving module;
the transmitting antenna is used for projecting the laser pulse signal transmitted by the laser transmitting module to a target object;
the receiving antenna is used for receiving the echo laser pulse signal reflected by the target object and converging the echo laser pulse signal to the laser receiving module;
the laser receiving module is used for converting the echo laser pulse signal into an electric signal;
the control and information processing circuit component is used for receiving the distance measuring instruction sent by the upper computer, controlling the driving circuit to work after receiving the temperature signal sent by the temperature detection module and ensuring that the laser diode emits a laser pulse signal under the premise of proper temperature; the control and information processing circuit component is also used for processing the laser pulse signal and the echo laser pulse signal to obtain the distance information of the target object, and transmitting the distance information to an upper computer through a communication interface to finish laser ranging;
the power supply and temperature control assembly is respectively electrically connected with the control and information processing circuit assembly, the laser emitting module and the laser receiving module to realize power supply, the output end of the upper computer is sequentially connected with the power supply and temperature control assembly, the laser emitting module and the transmitting antenna, and the input end of the upper computer is sequentially connected with the control and information processing circuit assembly, the laser receiving module and the receiving antenna.
Further optimizing the scheme, the laser receiving module comprises an avalanche diode and a receiving circuit.
In the utility model, the voltage input by the power supply and the temperature control component is converted to supply power for the control and information processing circuit component, the laser emitting module and the laser receiving module; the temperature detection module in the laser emission module detects the temperature of the laser diode and feeds the temperature back to the control and information processing circuit component, the temperature control function is started, the laser diode is enabled to emit laser on the premise of proper temperature, the upper computer sends a distance measurement instruction, then the control and information processing circuit component drives the laser emission module to emit laser pulse signals, the laser pulse signals are projected to a detected target object through an emission antenna of the optical subsystem, echo laser signals reflected by the detected target object are gathered to the laser receiving module through a receiving antenna of the optical subsystem and converted into electric signals, then the control and information processing circuit processes the emitted laser pulse signals and the echo laser pulse signals to obtain distance information of the detected target object, and the distance information is transmitted to the upper computer through the communication interface to finish laser distance measurement.
The conversion formula of the distance information is as follows:
；
wherein L is the distance to be measured, c is the propagation speed of the laser in the atmosphere, t is the round-trip propagation time of the laser on the distance to be measured, c is a known quantity, and t is the quantity to be measured.
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 (2)
1. The utility model provides a laser diode distancer suitable for extreme condition, divides the system including laser emission module, laser receiving module, optics branch, and electricity, and optics divides the system to include transmitting antenna and receiving antenna, and electricity divides the system to include control and information processing circuit subassembly and power and temperature control component, and this laser diode distancer links to each other with the host computer and is used for carrying out laser ranging to target object, its characterized in that:
the laser emission module comprises a laser diode and a driving circuit, wherein the laser diode is used as a light source of the laser diode distance measuring machine, the driving circuit is used for driving the laser emission module to emit laser pulse signals, a temperature detection module used for detecting the temperature of the laser diode is further arranged in the laser emission module, and the temperature detection module feeds the detected temperature signals back to the control and information processing circuit component;
the upper computer is used for sending a distance measuring instruction;
the power supply and temperature control assembly is used for supplying power to the control and information processing circuit assembly, the laser emitting module and the laser receiving module;
the transmitting antenna is used for projecting the laser pulse signal transmitted by the laser transmitting module to a target object;
the receiving antenna is used for receiving the echo laser pulse signal reflected by the target object and converging the echo laser pulse signal to the laser receiving module;
the laser receiving module is used for converting the echo laser pulse signal into an electric signal;
the control and information processing circuit component is used for receiving the distance measuring instruction sent by the upper computer, controlling the driving circuit to work after receiving the temperature signal sent by the temperature detection module and ensuring that the laser diode emits a laser pulse signal under the premise of proper temperature; the control and information processing circuit component is also used for processing the laser pulse signal and the echo laser pulse signal to obtain the distance information of the target object, and transmitting the distance information to an upper computer through a communication interface to finish laser ranging;
the power supply and temperature control assembly is respectively electrically connected with the control and information processing circuit assembly, the laser emitting module and the laser receiving module to realize power supply, the output end of the upper computer is sequentially connected with the power supply and temperature control assembly, the laser emitting module and the transmitting antenna, and the input end of the upper computer is sequentially connected with the control and information processing circuit assembly, the laser receiving module and the receiving antenna.
2. A laser diode rangefinder as claimed in claim 1 wherein: the laser receiving module comprises an avalanche diode and a receiving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504877.2U CN209946386U (en) | 2019-04-15 | 2019-04-15 | Laser diode range finder suitable for extreme conditions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920504877.2U CN209946386U (en) | 2019-04-15 | 2019-04-15 | Laser diode range finder suitable for extreme conditions |
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| CN209946386U true CN209946386U (en) | 2020-01-14 |
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| CN201920504877.2U Active CN209946386U (en) | 2019-04-15 | 2019-04-15 | Laser diode range finder suitable for extreme conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740863A (en) * | 2021-09-26 | 2021-12-03 | 海南师范大学 | Laser radar system for realizing multi-line light emission/reception by high-brightness single tube |
-
2019
- 2019-04-15 CN CN201920504877.2U patent/CN209946386U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740863A (en) * | 2021-09-26 | 2021-12-03 | 海南师范大学 | Laser radar system for realizing multi-line light emission/reception by high-brightness single tube |
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