Laser position detection system

Abstract

The utility model discloses a laser position detection system which comprises a laser detection unit and an acquisition and analysis unit. The laser detection unit comprises a laser detector and an optical filter arranged on the surface of the laser detector; light rays with different wavelengths of incident laser are filtered out through the optical filter, and the laser detector collects filtered laser signals; the acquisition and analysis unit comprises an acquisition card; the signal input end of the acquisition card is connected with the signal output end of the laser detector through a coaxial cable, and the signal output end of the acquisition card outputs a laser position signal. According to the utility model, the influence of environmental noise can be greatly reduced, more accurate signal data can be obtained, and the detection precision of the laser position can be improved.

Description

Technical Field

[0001] The utility model relates to the field of optical signal position monitoring, in particular to a laser position detection system. Background Art

[0002] Laser position detection plays an important role in many fields. It can realize position measurement and is used to locate and track targets, such as positioning and measurement in industrial production, robot navigation, lesion location in medical imaging, target detection and tracking in laser radar, etc. Laser position detection can achieve positioning and control, improve production efficiency, and promote technological development.

[0003] At present, the existing laser position detection devices or systems are easily interfered by environmental noise, resulting in inaccurate collected signal data, thus making the detection accuracy of the laser position low. Therefore, in order to reduce the interference of environmental noise, a new laser position detection system is urgently needed, which can significantly reduce the influence of environmental noise, obtain more accurate signal data, and improve the detection accuracy of the laser position. Utility Model Content

[0004] In view of this, the purpose of the utility model is to overcome the defects in the prior art and provide a laser position detection system that can significantly reduce the impact of environmental noise, obtain more accurate signal data, and improve the detection accuracy of the laser position.

[0005] The laser position detection system of the utility model comprises a laser detection unit and a collection and analysis unit;

[0006] The laser detection unit includes a laser detector and a filter arranged on the surface of the laser detector; the incident laser passes through the filter to filter out light of different wavelengths, and the laser detector collects the filtered laser signal;

[0007] The acquisition and analysis unit includes an acquisition card; a signal input end of the acquisition card is connected to a signal output end of a laser detector via a coaxial cable, and a signal output end of the acquisition card outputs a laser position signal.

[0008] Furthermore, the acquisition and analysis unit also includes a linear power supply; an input end of the linear power supply inputs alternating current, and an output end of the linear power supply is connected to a power input end of the laser detector.

[0009] Furthermore, the acquisition and analysis unit also includes a USB port; the laser position signal output by the signal output end of the acquisition card is output to the outside through the USB port.

[0010] Furthermore, the acquisition card, linear power supply and USB port are all arranged in the first shell.

[0011] Furthermore, a plurality of circular holes are arranged on the edge of the first shell.

[0012] Furthermore, the coaxial cable adopts an SMA plug.

[0013] Furthermore, the laser detector and the filter are both arranged in the second shell.

[0014] Furthermore, a plurality of threaded holes are provided on the edge of the second shell.

[0015] Furthermore, the filter has a threaded hole.

[0016] The beneficial effects of the utility model are as follows: a laser position detection system disclosed by the utility model reduces the interference of ambient light on the laser signal by setting a filter to filter out light of different wavelengths in the incident laser, and further reduces the influence of ambient noise during signal transmission by setting a coaxial cable to connect the acquisition card and the laser detector, thereby being able to obtain more accurate signal data, thereby improving the detection accuracy of the laser position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the structure of the detection system of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the laser detector of the utility model for collecting laser signals;

[0020] Among them, 1- linear power supply, 2- acquisition card, 3- power socket, 4- USB port, 5- aviation plug, 6- first SMA plug, 7- M6 threaded hole, 8- laser detector, 9- filter, 10- second SMA plug, 11- M6 through hole, 12- collimator, 13- laser, 14- power plug. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings of the specification, as shown in the figure:

[0022] The laser position detection system of the utility model comprises a laser detection unit and a collection and analysis unit;

[0023] The laser detection unit includes a laser detector 8 and a filter 9 disposed on the surface of the laser detector 8; the incident laser passes through the filter 9 to filter out light of different wavelengths, and the laser detector 8 collects the filtered laser signal;

[0024] The acquisition and analysis unit includes an acquisition card 2; the signal input end of the acquisition card 2 is connected to the signal output end of the laser detector 8 through a coaxial cable, and the signal output end of the acquisition card 2 outputs a laser position signal.

[0025] The present invention reduces the interference of ambient light on the laser signal by setting a filter 9 to filter out light of different wavelengths in the incident laser, and can effectively resist external electromagnetic interference by setting a coaxial cable, so as to obtain more accurate signal data, thereby improving the detection accuracy of the laser position.

[0026] Among them, the laser detector 8 can adopt the existing Hamamatsu S5991-01 PSD detector, whose surface shunt-type silicon optical semiconductor detection surface is provided with a pair of output electrodes x1, x2, y1, y2 in two orthogonal directions x and y. The output photocurrent of each electrode is linearly distributed according to the coordinate position of the irradiated light spot, and the position coordinates of the light spot on the detection surface can be calculated according to the four-way photocurrent signal.

[0027] The acquisition card 2 can use the existing NI acquisition card USB-6211, which can maintain high precision at high sampling rates; the acquisition card provides 16 analog inputs, 250kS / s single-channel sampling rate, 2 analog outputs, 8 digital input lines, 8 digital output lines, and each channel has 4 programmable input ranges (±0.2V-±10V), digital trigger, and 2 counters / timers. It can collect and analyze the four voltages of the laser detector 8, and finally obtain the position and FFT information of the incident laser; it ensures the real-time and accuracy of data refresh, and provides a means of observing data in the time domain and frequency domain.

[0028] In this embodiment, the acquisition and analysis unit also includes a linear power supply 1; the input end of the linear power supply 1 inputs alternating current, and the output end of the linear power supply 1 is connected to the power input end of the laser detector 8 through the aerial plug 5. In the linear power supply 1, the input AC signal is first converted into the required voltage through a transformer; then, the AC is converted into DC through a rectifier (such as a diode rectifier); the high-frequency fluctuation components in the DC signal are filtered out by a filter to ensure the stability and smoothness of the output voltage; finally, the stability of the output voltage is ensured by a voltage stabilizer, and the output voltage can remain constant even when the load changes or the input voltage fluctuates. By setting up a linear power supply 1, a stable power supply can be provided for the laser detector 8; using the aerial plug 5 as a connector, it has high durability, waterproofness and vibration resistance, and is particularly suitable for use in harsh environments.

[0029] In this embodiment, the acquisition and analysis unit further includes a USB port 4; the laser position signal outputted by the signal output end of the acquisition card 2 is outputted externally through the USB port 4. Using the USB port 4 to output the laser position signal can improve versatility, data transmission speed, facilitate connection, and improve the integration of the detection system, and can also support remote control and remote data transmission.

[0030] In this embodiment, the acquisition card 2, the linear power supply 1 and the USB port 4 are all arranged in the first housing. By integrating the acquisition card 2, the linear power supply 1 and the USB port 4 in the first housing, the compactness, reliability and maintenance convenience of the system can be improved, and the appearance of the system can also be made more complete.

[0031] In this embodiment, the edge of the first housing is provided with a plurality of circular holes, which may be M6 through holes 11. The M6 ​​through holes 11 can provide stronger connection and fixation, facilitate installation and maintenance, and enhance the reliability and stability of the system.

[0032] In this embodiment, the coaxial cable adopts an SMA plug. The SMA plug includes a first SMA plug 6 provided on the acquisition card 2 and a second SMA plug 10 provided on the laser detector 8. Selecting the SMA plug can provide stable, high-quality, high-frequency signal transmission, reduce signal transmission loss, and improve signal anti-interference ability.

[0033] In this embodiment, the laser detector 8 and the filter 9 are both arranged in the second housing. Integrating the laser detector 8 and the filter 9 in the second housing can provide protection, reduce interference, facilitate integration, save space and improve reliability, thus achieving high integration of the system.

[0034] By providing the first shell and the second shell to integrate various electronic components, the size of the device is further reduced, making it convenient to carry and quick to assemble.

[0035] In this embodiment, the edge of the second housing is provided with a plurality of threaded holes, which are M6 threaded holes 7. The threaded holes can provide a reliable fixing and connection method, facilitate the installation and removal of components, and enhance the stability and aesthetics of the system.

[0036] In this embodiment, the filter 9 has a threaded hole, which is convenient for users to disassemble, and users can choose filters of different wavelengths to meet different test conditions.

[0037] When the laser position detection system of the present invention is used, it is connected to a computer or a host computer through the USB port 4. After the laser 13 emits incident laser light through the collimating lens 12 and reaches the target surface of the laser detector 8, the change of the light spot position can be observed through the host computer software.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A laser position detection system, characterized in that: It includes a laser detection unit and an acquisition and analysis unit; The laser detection unit includes a laser detector and a filter arranged on the surface of the laser detector; the incident laser passes through the filter to filter out light of different wavelengths, and the laser detector collects the filtered laser signal; The acquisition and analysis unit includes an acquisition card; a signal input end of the acquisition card is connected to a signal output end of a laser detector via a coaxial cable, and a signal output end of the acquisition card outputs a laser position signal.

2. The laser position detection system according to claim 1, characterized in that: The acquisition and analysis unit also includes a linear power supply; an input end of the linear power supply inputs alternating current, and an output end of the linear power supply is connected to a power input end of the laser detector.

3. The laser position detection system according to claim 2, characterized in that: The acquisition and analysis unit also includes a USB port; the laser position signal output by the signal output end of the acquisition card is output to the outside through the USB port.

4. The laser position detection system according to claim 3, characterized in that: The acquisition card, linear power supply and USB port are all arranged on the first shell.

5. The laser position detection system according to claim 4, characterized in that: A plurality of circular holes are arranged on the edge of the first shell.

6. The laser position detection system according to claim 1, characterized in that: The coaxial cable adopts an SMA plug.

7. The laser position detection system according to claim 1, characterized in that: The laser detector and the filter are both arranged in the second housing.

8. The laser position detection system according to claim 7, characterized in that: A plurality of threaded holes are arranged on the edge of the second shell.

9. The laser position detection system according to claim 1, characterized in that: The filter has a threaded hole.

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