A fast switching system for far and near distances of a laser rangefinder telescope

Abstract

The present invention relates to a rapid switching system for far and near distances of a laser rangefinder telescope, comprising: a received signal amplification module, a received signal detection module, a drive voltage switching module, and an MCU module; the output end of the received signal amplification module is electrically connected to the input end of the received signal detection module, the output end of the received signal detection module is electrically connected to the MCU module, the input end of the drive voltage switching module is electrically connected to the MCU module, and the output end is electrically connected to the received signal amplification module; a DAC control unit is integrated in the MCU module. When a high level is detected and sent by the received signal detection module, a high control voltage is output to make the drive voltage switching module output a low voltage, and at this time, it is in the near-distance measurement mode; when the MCU module detects that the received signal detection module sends a low level, a low control voltage is output to make the drive voltage switching module output a high voltage, and at this time, it is in the far-distance measurement mode. The method of the present invention improves the response speed and measurement accuracy of the laser rangefinder telescope.

Description

Technical Field

[0001] The present invention relates to the field of laser ranging, and particularly to a fast switching system for far and near distances of a laser ranging telescope. Background Art

[0002] The measuring distance of a laser ranging telescope can reach up to thousands of meters. During the measurement process, due to different measured distances, the required received working voltage is also different. The greater the distance, the higher the received working voltage. Conversely, the closer the distance, the lower the received working voltage.

[0003] For existing laser ranging telescopes, in order to improve the measurement speed, most manufacturers will directly set a fixed received working voltage, so that when switching between far and near distance measurements, a quick response can be obtained to obtain the measured distance. However, this method, in order to meet the measurement of long distances, often sets the received working voltage relatively high, and when measuring short distances, it will cause signal saturation and overload phenomena, resulting in the inability to detect the true signal, thus resulting in poor measurement accuracy and large errors for short distance measurements.

[0004] Now, in order to improve the accuracy of laser ranging telescopes, the received working voltage is designed to automatically adapt to the measured distance, so that the received working voltage can be adjusted. However, this method has a slow response speed and a long voltage stabilization time when switching between short and long distances for measurement, sacrificing the measurement speed and seriously affecting the measurement efficiency.

[0005] Therefore, there is an urgent need for a fast switching system for far and near distances of a laser ranging telescope. Summary of the Invention

[0006] (I) Technical Problems to be Solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a fast switching system for far and near distances of a laser ranging telescope, which solves the technical problem that the response speed is slow when switching between far and near distances for measurement, seriously affecting the measurement rate.

[0008] (II) Technical Solutions

[0009] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0010] In a first aspect, an embodiment of the present invention provides a fast switching system for far and near distances of a laser ranging telescope, including:

[0011] a received signal amplification module, a received signal detection module, a driving voltage switching module, and an MCU module;

[0012] The output end of the received signal amplification module is electrically connected to the input end of the received signal detection module, the output end of the received signal detection module is electrically connected to the MCU module, the input end of the drive voltage switching module is electrically connected to the MCU module, and the output end is electrically connected to the received signal amplification module;

[0013] The MCU module integrates a DAC control unit, and the DAC control unit is used to output a DAC voltage control signal to the drive voltage switching module;

[0014] After the MCU module detects the high level sent by the received signal detection module, it outputs a high control voltage through the DAC control unit, so that the drive voltage switching module outputs a low voltage, and switches the laser rangefinder telescope to the short-distance measurement mode;

[0015] After the MCU module detects the low level sent by the received signal detection module, it outputs a low control voltage through the DAC control unit, so that the drive voltage switching module outputs a high voltage, and switches the laser rangefinder telescope to the long-distance measurement mode;

[0016] The drive voltage switching module includes: a boost unit, a high-voltage output unit, a high-voltage detection unit, a voltage feedback unit, a filtering unit, a DAC voltage adjustment unit, and a boost chip unit that are electrically connected in sequence.

[0017] Optionally, the input end of the boost chip unit is electrically connected to the MCU module, the output end is electrically connected to the input end of the filtering unit, the input end of the filtering unit is electrically connected to the input end of the DAC voltage adjustment unit, the output end of the DAC voltage adjustment unit is electrically connected to the input end of the voltage feedback unit, the output end of the voltage feedback unit is electrically connected to the input end of the boost chip unit, the output end of the boost chip unit is electrically connected to the input end of the boost unit, the output end of the boost unit is electrically connected to the input end of the high-voltage output unit, the output end of the high-voltage output unit is connected to the input end of the high-voltage detection unit, and the output end of the high-voltage detection unit is connected to the MCU module and the received signal amplification module.

[0018] Optionally, the drive voltage switching module further includes:

[0019] An ambient temperature detection unit; the ambient temperature detection unit is electrically connected to the MCU module;

[0020] The ambient temperature detection unit includes: a thermistor NTC, a seventh resistor R7, an eighth resistor R8, a seventh capacitor C7, and a second power supply;

[0021] Among them, the thermistor NTC is connected to the eighth resistor R8, and the eighth resistor R8 is connected to the second power supply; the node between the thermistor NTC and the eighth resistor R8 is used as the output end, and is electrically connected to the seventh resistor R7 and the seventh capacitor C7; the seventh capacitor C7 is connected to the MCU module.

[0022] Optionally, the ambient temperature detection unit is configured to detect in real time the ambient temperature where the received signal amplification module is located, convert the ambient temperature into an electrical signal, and transmit the electrical signal to the MCU module;

[0023] The MCU module compares the preset standard temperature for zero compensation with the ambient temperature, and compensates the voltage information output by the high-voltage output unit according to a preset compensation coefficient to obtain the voltage information output by the drive voltage switching module;

[0024] The compensation coefficient is 15 mV / °C. For every one-degree increase in temperature, the voltage decreases by 15 mV, and vice versa, it increases by 15 mV.

[0025] Optionally, the received signal detection module includes:

[0026] The eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, and the second comparator chip U2;

[0027] The tenth resistor R10 is connected to the ninth resistor R9, and the ninth resistor R9 is connected to the second power supply; the node between the tenth resistor R10 and the ninth resistor R9 serves as the first reference voltage node and is connected to the second comparator chip U2 and the ninth capacitor C9; the eleventh resistor R11 is connected to the twelfth resistor R12, the twelfth resistor R12 is connected to the second power supply, the eighth capacitor C8 is connected in parallel with the eleventh resistor R11, and the node between the eleventh resistor R11, the eighth capacitor C8, and the twelfth resistor R12 serves as the second reference voltage node and is connected to the second comparator chip U2; the tenth capacitor C10 is connected to the second power supply and the second comparator chip U2.

[0028] Optionally, the boost chip unit includes: a first power supply, a high-voltage MOS transistor Q1, a first inductor L1, and a fourth capacitor C4;

[0029] The input end of the high-voltage MOS transistor Q1 is connected to the output end of the boost chip unit, and the output end is connected to the high-voltage output unit; the first inductor L1 is connected to the fourth capacitor C4, and the first inductor L1, the first power supply, and the fourth capacitor C4 are connected in parallel to the circuit formed by the boost chip unit and the high-voltage MOS transistor Q1.

[0030] Optionally, the DAC voltage regulation unit includes: a second resistor R2;

[0031] The voltage feedback unit includes: a third resistor R3, a fourth resistor R4, and a second capacitor C2;

[0032] The third resistor R3 and the fourth resistor R4 are connected in series, and the second capacitor C2 is connected in parallel with the third resistor R3.

[0033] Optionally, the high-voltage output unit is a rectifying and filtering circuit composed of a diode D1 and a fifth capacitor C5;

[0034] The high-voltage detection unit includes: a fifth resistor R5, a sixth resistor R6, and a sixth capacitor C6; among them, the fifth resistor R5, the sixth resistor R6, and the sixth capacitor C6 are connected in series and parallel.

[0035] Optionally, when the high-voltage MOS transistor Q1 is turned on, the first inductor L1 shorts the first power supply, and the first power supply charges the first inductor L1, and the inductor current increases at a fixed slope, and the first inductor L1 starts to store energy;

[0036] When the high-voltage MOS transistor Q1 is turned off, the inductor current continues to flow in the original current direction, and the first inductor L1 prevents the current from decreasing and generates a back electromotive force.

[0037] In a second aspect, an embodiment of the present invention provides a laser rangefinder telescope, including:

[0038] An optical component for collecting target light and magnifying and imaging;

[0039] A laser generating component for generating and emitting laser pulses;

[0040] A laser rangefinder telescope far and near distance rapid switching system for quickly adjusting the working voltage;

[0041] A data processing component for processing received electrical signals and calculating measurement results;

[0042] A user interface component for displaying measurement results and allowing users to make settings and controls;

[0043] The laser rangefinder telescope far and near distance rapid switching system is the laser rangefinder telescope far and near distance rapid switching system according to any one of the first aspects above.

[0044] (III) Beneficial effects

[0045] The beneficial effects of the present invention are as follows: A fast switching system for far and near distances of a laser rangefinder telescope according to the present invention includes a received signal amplification module, a received signal detection module, a driving voltage switching module, and an MCU module. A DAC control unit for outputting a control signal to the driving voltage switching module is integrated in the MCU module. In combination with the driving voltage switching module designed in this application, after the MCU module detects a high level sent by the received signal detection module, a high control voltage is output through the DAC control unit, so that the driving voltage switching module outputs a low voltage, and the laser rangefinder telescope is switched to the near-distance measurement mode; conversely, the driving voltage switching module outputs a high voltage, and the laser rangefinder telescope is switched to the long-distance measurement mode, improving the test response speed of far and near distances after switching the voltage during the ranging process. In addition, during the measurement process of the fast switching system for far and near distances of the present invention, the MCU module can also cooperate with the DAC control unit to collect signals sent by the ambient temperature detection unit, the received signal detection module, and the high-voltage detection unit. After being processed by the MCU module and the DAC control unit, the DAC control unit outputs a voltage control signal, thereby adjusting the voltage output by the driving voltage switching module in real time, making the received signal in a state convenient for processing, and thus improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of a fast switching system for far and near distances of a laser rangefinder telescope according to an embodiment of the present invention;

[0047] Figure 2 It is a response time diagram of a laser rangefinder telescope in the prior art;

[0048] Figure 3 It is a response time diagram of a laser rangefinder telescope in a laser rangefinder telescope according to Embodiment 3 of the present invention.

[0049]

DESCRIPTION OF THE REFERENCE NUMERALS

[0050] 1: Boosting unit; 2: High-voltage output unit; 3: High-voltage detection unit; 4: Ambient temperature detection unit; 5: Voltage feedback unit; 6: Filtering unit; 7: DAC voltage regulation unit; 8: Boosting chip unit; 9: Received signal detection module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] In order to better explain the present invention for easy understanding, the present invention will be described in detail below with reference to the drawings through specific embodiments.

[0052] A fast switching system for far and near distances of a laser rangefinder telescope according to the present invention includes a received signal amplification module, a received signal detection module, a driving voltage switching module, and an MCU module. A DAC control unit for outputting a control signal to the driving voltage switching module is integrated in the MCU module. In combination with the driving voltage switching module designed in this application, after the MCU module detects a high level sent by the received signal detection module, it outputs a high control voltage through the DAC control unit, causing the driving voltage switching module to output a low voltage, and switching the laser rangefinder telescope to the near-distance measurement mode; conversely, causing the driving voltage switching module to output a high voltage, and switching the laser rangefinder telescope to the far-distance measurement mode, improving the test response speed for far and near distances after switching the voltage during the ranging process. In addition, during the measurement process of the fast switching system for far and near distances of the present invention, the MCU module can also cooperate with the DAC control unit to collect signals sent by an ambient temperature detection unit, a received signal detection module, and a high-voltage detection unit. After being processed by the MCU module and the DAC control unit, a voltage control signal is output by the DAC control unit, thereby adjusting the voltage output by the driving voltage switching module in real time, making the received signal in a state convenient for processing, and thus improving the measurement accuracy.

[0053] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more clear and thorough understanding of the present invention and to be able to convey the scope of the present invention completely to those skilled in the art.

[0054] Embodiment 1

[0055] See Figure 1 , a fast switching system for far and near distances of a laser rangefinder telescope according to an embodiment of the present invention includes:

[0056] A received signal amplification module, a received signal detection module 9, a driving voltage switching module, and an MCU module;

[0057] The output end of the received signal amplification module is electrically connected to the input end of the received signal detection module 9, the output end of the received signal detection module 9 is electrically connected to the MCU module, the input end of the driving voltage switching module is electrically connected to the MCU module, and the output end is electrically connected to the received signal amplification module;

[0058] A DAC control unit is integrated in the MCU module, and the DAC control unit is used to output a DAC voltage control signal to the driving voltage switching module;

[0059] After the MCU module detects the high level sent by the received signal detection module 9, it outputs a high control voltage through the DAC control unit, causing the drive voltage switching module to output a low voltage and switching the laser rangefinder telescope to the close-range measurement mode;

[0060] After the MCU module detects the low level sent by the received signal detection module 9, it outputs a low control voltage through the DAC control unit, causing the drive voltage switching module to output a high voltage and switching the laser rangefinder telescope to the long-range measurement mode.

[0061] In the specific implementation process, the received signal amplification module receives the reflected signal, filters the reflected signal, and then sends it to the received signal detection module 9. The received signal detection module determines whether the voltage of the currently received signal plus the preset reference voltage is greater than the preset comparison voltage.

[0062] If it is greater than the preset comparison voltage, the received signal detection module 9 outputs a high level to the MCU module. At this time, after the MCU module detects that the received signal detection module 9 sends a high level, it outputs a high control voltage through the DAC control unit, causing the drive voltage switching module to output a low voltage, thereby switching the laser rangefinder telescope to the close-range measurement mode;

[0063] If it is less than the preset comparison voltage, the received signal detection module 9 outputs a low level to the MCU module. At this time, after the MCU module detects that the received signal detection module 9 sends a low level, it outputs a low control voltage through the DAC control unit, causing the drive voltage switching module to output a high voltage, thereby switching the laser rangefinder telescope to the long-range measurement mode.

[0064] Among them, the range of the low voltage and the high voltage is 60 - 120V, the range of the low voltage control signal is 0.8V to 1.2V, and the range of the high voltage control signal is 1.2V to 2V. The high level and the low level can also be changed accordingly according to the actual ranging, laser power, and measurement distance. When the drive voltage switching module receives the low control voltage, it outputs the lowest gear of the low voltage, which is 60V. When the drive voltage switching module receives the high control voltage, it outputs the highest gear of the high voltage, which is 120V. After that, the voltage can be finely adjusted according to the waveform characteristics, so as to improve the measurement distance and measurement accuracy at the same time.

[0065] Specifically, the voltage fine adjustment according to the waveform characteristics includes:

[0066] When the DAC control unit outputs a low control voltage and the lowest gear of the low control voltage is output, the output terminal of the high-voltage output unit 2 outputs the maximum driving voltage value. At this time, it switches to the long-distance measurement mode. The MCU module, based on the signal waveform returned by the measured target obtained under the current maximum driving voltage value, if the pulse width of the collected waveform signal is zero, directly measures using this maximum driving voltage value. If the pulse width of the collected waveform signal is greater than zero, the MCU module increases the output voltage of the DAC control unit, thereby reducing the output voltage of the output terminal of the high-voltage output unit 2 until the pulse width of the returned waveform is zero, and then stops the adjustment. If the collected waveform signal is very weak and has exceeded the measurement range, an out-of-range prompt is output.

[0067] When the DAC control unit outputs a high control voltage and the highest gear of the high control voltage is output, the output terminal of the high-voltage output unit 2 outputs the minimum driving voltage value. At this time, it switches to the short-distance measurement mode. The MCU module, based on the signal waveform returned by the measured target obtained under the current minimum driving voltage value, if the collected waveform signal is weak and less than the preset threshold (this threshold varies according to the measurement range), the MCU module reduces the output voltage of the DAC control unit, thereby increasing the output voltage of the output terminal of the high-voltage output unit 2 until the collected waveform signal is greater than or equal to the preset threshold, then stops the adjustment and outputs the corresponding measurement result. If the signal collected using the highest gear of the highest voltage is still a saturated waveform signal, the measurement result is output after compensation through the distance compensation algorithm.

[0068] When environmental temperature voltage compensation and high-voltage output feedback compensation are required, the voltage output by the DAC control unit is superimposed with the environmental temperature compensation voltage and the high-voltage output compensation voltage.

[0069] Specifically, the MCU module's acquisition of the level signal data sent by the received signal detection module 9 specifically includes:

[0070] A circular data buffer with a length of 20 is established. Each time a new sampling value of the level signal data sent by the received signal detection module 9 is obtained, according to the latest collected data and 19 historical data, a weight of 3:7 is assigned, where the 19 historical weights are evenly distributed with 70% of the weight, which can effectively suppress random interference while retaining the fast-changing characteristics of the signal. The sampling sequence is dynamically maintained by using a circular queue structure. Each time a calculation is performed, the buffer is traversed for weighted accumulation, and the smoothed voltage value is output to the DAC control unit. This processing method of the MCU module can increase the step response speed by 25% and enhance the ability to suppress pulse noise by 40%.

[0071] The DAC control unit adopts a dynamic DAC control method, specifically including constructing a DAC output control model, setting 2048 as the medium-distance reference value, and its corresponding output voltage is 1.2V. When the measured distance is less than the preset maximum value of the short distance, the maximum value 4095 is directly output to trigger the high-voltage output of the DAC control unit to be 2V. When the distance exceeds the preset minimum value of the long distance, the minimum value 0 is output to trigger the low-voltage output of the DAC control unit to be 0.8V.

[0072] According to the level signal data sent by the received signal detection module 9, the formula for controlling the DAC output value is:

[0073] ;

[0074] Among them, V max is the maximum output level of 2V, V min is the minimum output level of 0.8V, V0 is the reference level of 1.2V, and V in is the level signal data sent by the received signal detection module 9.

[0075] The drive voltage switching module includes:

[0076] A boost unit 1, a high-voltage output unit 2, a high-voltage detection unit 3, a voltage feedback unit 5, a filtering unit 6, a DAC voltage regulation unit 7, and a boost chip unit 8;

[0077] The input end of the boost chip unit 8 is electrically connected to the MCU module, the output end is electrically connected to the input end of the filtering unit 6, the input end of the filtering unit 6 is electrically connected to the input end of the DAC voltage regulation unit 7, the output end of the DAC voltage regulation unit 7 is electrically connected to the input end of the voltage feedback unit 5, the output end of the voltage feedback unit 5 is electrically connected to the input end of the boost chip unit 8, the output end of the boost chip unit 8 is electrically connected to the input end of the boost unit 1, the output end of the boost unit 1 is electrically connected to the input end of the high-voltage output unit 2, the output end of the high-voltage output unit 2 is connected to the input end of the high-voltage detection unit 3, and the output end of the high-voltage detection unit 3 is connected to the MCU module and the received signal amplification module.

[0078] Among them, the DAC voltage regulation unit 7 is the second resistor R2. The DAC voltage is connected to the FB pin of the boost chip unit 8 through the second resistor R2, and according to the design of the rangefinder telescope to measure the distance and the distance of the received return laser, the range of the DAC to adjust the RX-HV voltage is determined.

[0079] The drive voltage switching module also includes:

[0080] An ambient temperature detection unit 4; the ambient temperature detection unit 4 is electrically connected to the MCU module;

[0081] The ambient temperature detection unit 4 includes: a thermistor NTC, a seventh resistor R7, an eighth resistor R8, a seventh capacitor C7, and a second power supply;

[0082] Among them, the thermistor NTC is connected to the eighth resistor R8, and the eighth resistor R8 is connected to the second power supply; the node between the thermistor NTC and the eighth resistor R8 serves as the output terminal and is electrically connected to the seventh resistor R7 and the seventh capacitor C7; the seventh capacitor C7 is connected to the MCU module.

[0083] The ambient temperature detection unit 4 is used to detect the ambient temperature of the received signal amplification module in real time, convert the ambient temperature into an electrical signal, and transmit the electrical signal to the MCU module;

[0084] The MCU module compares the preset standard temperature of zero compensation with the ambient temperature, and compensates the voltage information output by the high-voltage output unit 2 according to the preset compensation coefficient to obtain the voltage information output by the drive voltage switching module;

[0085] The compensation coefficient is 15 mV / °C. For every degree increase in temperature, the voltage decreases by 15 mV, and vice versa, it increases by 15 mV.

[0086] Specifically, the ambient temperature detection unit 4 detects the ambient temperature of the received signal amplification module, converts the temperature into an electrical signal and sends it to the MCU module. The MCU module analyzes the ADC signals sent by the high-voltage output unit 2 and the ambient temperature detection unit, and combines the waveform signal characteristics of the received target object returned by the signal reception amplification module to finely adjust the voltage output by the drive voltage switching module, so as to meet the needs of different measurement distances.

[0087] Further, the received signal detection module 9 includes:

[0088] An eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a second comparator chip U2;

[0089] The tenth resistor R10 is connected to the ninth resistor R9, and the ninth resistor R9 is connected to the second power supply; the node between the tenth resistor R10 and the ninth resistor R9 serves as the first reference voltage node and is connected to the second comparator chip U2 and the ninth capacitor C9; the eleventh resistor R11 is connected to the twelfth resistor R12, the twelfth resistor R12 is connected to the second power supply, the eighth capacitor C8 is connected in parallel with the eleventh resistor, and the node between the eleventh resistor R11, the eighth capacitor C8, and the twelfth resistor R12 serves as the second reference voltage node and is connected to the second comparator chip U2; the tenth capacitor C10 is connected to the second power supply and the second comparator chip U2.

[0090] In this embodiment, the boost chip unit 8 includes: a first power supply, a high-voltage MOS transistor Q1, a first inductor L1, and a fourth capacitor C4;

[0091] The input end of the high-voltage MOS transistor Q1 is connected to the output end of the boost chip unit 8, and the output end is connected to the high-voltage output unit 2; the first inductor L1 is connected to the fourth capacitor C4, and the first inductor L1, the first power supply, and the fourth capacitor C4 are connected in parallel to the circuit composed of the boost chip unit 8 and the high-voltage MOS transistor Q1.

[0092] In a specific implementation process, the DAC voltage adjustment unit 7 includes: a second resistor R2;

[0093] The voltage feedback unit 5 includes: a third resistor R3, a fourth resistor R4, and a second capacitor C2;

[0094] The third resistor R3 and the fourth resistor R4 are connected in series, and the second capacitor C2 is connected in parallel with the third resistor R3.

[0095] The filtering unit 6 is an RC filtering circuit composed of a series connection of a first resistor R1 and a first capacitor C1, and is used to filter out high-frequency noise;

[0096] In this embodiment, the high-voltage output unit 2 is a rectifying and filtering circuit composed of a diode D1 and a fifth capacitor C5;

[0097] The high-voltage detection unit 3 includes: a fifth resistor R5, a sixth resistor R6, and a sixth capacitor C6; among them, the fifth resistor R5, the sixth resistor R6, and the sixth capacitor C6 are connected in series and parallel.

[0098] Furthermore, the boost unit 1 includes a high-voltage MOS transistor Q1, a first inductor L1, and a fourth capacitor C4. When the high-voltage MOS transistor Q1 is turned on, it is equivalent to short-circuiting the first power supply with the inductor, and the inductor current will increase at a fixed slope. At this time, the first inductor L1 stores energy. When the high-voltage MOS transistor Q1 is turned off, since the inductor current will not jump, the inductor current continues to flow in the original current direction, and the first inductor L1 has to prevent its current from decreasing. At this time, a reverse electromotive force VL is generated to achieve boosting.

[0099] The reverse electromotive force VL is rectified by the diode D1. At this time, the voltage RX-HV on the fifth capacitor C5 is equal to the reverse electromotive force VL on the first inductor L1 plus the voltage 3.3V of the first power supply.

[0100] A laser rangefinder telescope long-distance and short-distance rapid switching system in this embodiment greatly improves the ranging speed and response speed of the laser rangefinder telescope, effectively avoids the problems of poor measurement accuracy and large error during short-distance measurement, and improves the measurement accuracy.

[0101] Embodiment 2

[0102] The fast far - near switching system of a laser rangefinder telescope in this embodiment is the same as that in Embodiment 1, which will not be elaborated here, and only the information flow will be described.

[0103] In the specific implementation process, for the fast far - near switching system of a laser rangefinder telescope in this embodiment, the circuit flow is as follows:

[0104] According to the designed measurement distance of the rangefinder telescope and the intensity of the received returned laser, determine the adjustment range of the RX - HV voltage;

[0105] Connect a first power supply and a second power supply in the circuit. Both the first power supply and the second power supply are 3.3V power supplies. After connecting the power supplies, the DAC control unit outputs a DAC signal for controlling the output of the RX - HV voltage;

[0106] The DAC signal passes through the filtering unit 6 to filter out high - frequency noise from the DAC signal, making the DAC voltage signal more stable;

[0107] The DAC signal after passing through the filtering unit 6 passes through the DAC voltage adjustment unit 7 and is input to the FB pin of the boost chip unit 8;

[0108] The boost chip unit 8 issues a boost control signal through the EXT pin, thereby controlling the conduction and turn - off of the high - voltage MOS transistor Q1 in the boost circuit. When the high - voltage MOS transistor Q1 is conducting, a loop is formed with the first power supply, and the first power supply charges the first inductor L1. At this time, the inductor current increases at a fixed slope and starts to store energy. At the same time, the fourth capacitor C4 filters the first power supply. When the high - voltage MOS transistor Q1 is turned off, the current flows to the diode D1. At the same time, since the first inductor L1 stores energy, its current will not jump, and the inductor current continues to flow in the original current direction. In order to prevent its current from decreasing, the first inductor L1 generates a reverse electromotive force VL. This reverse electromotive force VL is superimposed on the first power supply and rectified by the diode D1 and loaded on the fifth capacitor C5. At this time, the voltage applied to the fifth capacitor C5 is the reverse electromotive force VL plus 3.3V, which is the RX - HV voltage;

[0109] After generating the RX - HV voltage, the high - voltage detection unit 3 obtains the real - time RX - HV voltage output value and feeds the output value back to the MCU module. The MCU module adjusts the output signal of the DAC through the feedback information;

[0110] By inputting the RX-HV voltage into the voltage feedback unit 5, after voltage division through the third resistor R3 and the fourth resistor R4, the RX-HV voltage is fed back to the FB pin of the boost chip unit 8. At the same time, the second capacitor C2 is connected in parallel with the third resistor R3 to feed back the high-frequency noise of the RX-HV voltage to the FB pin of the boost chip unit 8, thereby suppressing high-frequency noise; the voltage feedback unit 5 can prevent the instability during the reset stage of the MCU module, which may cause the RX-HV voltage to be too high and burn out components.

[0111] The ambient temperature detection unit 4 acquires the ambient temperature and converts it into a signal to be sent to the MCU module. The MCU module performs real-time temperature compensation based on the acquired ambient temperature signal.

[0112] When the present invention performs voltage switching, the stabilization time is short. Compared with the existing laser rangefinder telescopes, the ranging speed and response speed of the laser rangefinder telescope are greatly improved; in addition, the present invention can directly perform real-time adjustment of the RX-HV voltage during the measurement process, effectively avoiding the problem of signal saturation at close range caused by using a fixed voltage, resulting in the inability to detect the true signal, thus leading to poor measurement accuracy and large errors at close range; furthermore, the present invention solves the problem of long stabilization time for adjusting the RX-HV power supply. The voltage can be adjusted in real time during the measurement process to keep the received signal in the linear region, thereby improving the measurement accuracy.

[0113] Embodiment 3

[0114] An embodiment of the present invention provides a laser rangefinder telescope, comprising:

[0115] An optical component for collecting target light and magnifying the image;

[0116] A laser generation component for generating and emitting laser pulses;

[0117] A laser rangefinder telescope far and near distance fast switching system for quickly adjusting the working voltage;

[0118] A data processing component for processing the received electrical signals and calculating the measurement results;

[0119] A user interface component for displaying the measurement results and allowing the user to make settings and controls;

[0120] The laser rangefinder telescope far and near distance fast switching system is the laser rangefinder telescope far and near distance fast switching system described in any one of Embodiment 1 and Embodiment 2.

[0121] In a specific implementation process, the optical component includes an objective lens and an eyepiece for collecting target light and magnifying the image; the objective lens is responsible for collecting the target light from a distance, and the eyepiece helps the user observe the magnified image.

[0122] The laser emission component includes a laser diode and associated drive circuits. The laser diode generates and emits laser pulses, which are directed towards the target object.

[0123] The laser rangefinder telescope long and short distance rapid switching system is the laser rangefinder telescope long and short distance rapid switching system described in any one of Embodiment 1 and Embodiment 2.

[0124] The data processing component includes a microprocessor or FPGA for processing the received electrical signals and calculating the measurement results.

[0125] The user interface component includes an LCD display screen and buttons or a touch screen. The display screen is used to display the measurement results, and the buttons or touch screen are used to allow the user to make settings and controls.

[0126] The laser rangefinder telescope in this embodiment is a portable optoelectronic instrument. Under its laser emission power, it is safe for the human eye, does not require a paired target, and can measure the distance to any target; it is small in size and light in weight, making it easy to carry.

[0127] On the other hand, the laser rangefinder telescope of this embodiment adopts the laser rangefinder telescope long and short distance rapid switching system described in any one of Embodiment 1 and Embodiment 2, which improves the response speed of the laser rangefinder telescope. As Figure 2 and Figure 3 shown, for a laser rangefinder telescope without the laser rangefinder telescope long and short distance rapid switching system in this embodiment, its response speed is 80 ms, while for the laser rangefinder telescope equipped with the laser rangefinder telescope long and short distance rapid switching system in this embodiment, the response speed is improved and reaches 6 ms.

[0128] The laser rangefinder telescope in this embodiment is widely used in the installation of power equipment. It is fully equipped with a scanning measurement function and can easily identify small distant targets, such as electric wires, wire towers, etc. Further, the laser rangefinder telescope in this embodiment can be applied to various outdoor measurements such as highways, municipal engineering, forestry survey and design, building construction, network planning survey equipment, communication maintenance, etc., and individual outdoor sports enthusiasts such as golf.

[0129] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0130] In the present invention, unless otherwise clearly specified or limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0131] In the present invention, unless otherwise clearly specified or limited, when a first feature is "on" or "under" a second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when a first feature is "above", "over" and "on top of" a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it merely means that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "under", "below" and "beneath" a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it merely means that the horizontal height of the first feature is lower than that of the second feature.

[0132] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. refer to that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0133] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A laser ranging telescope long and short distance rapid switching system, characterized in that: include: A received signal amplification module, a received signal detection module (9), a drive voltage switching module and an MCU module; The output end of the received signal amplification module is electrically connected to the input end of the received signal detection module (9), the output end of the received signal detection module (9) is electrically connected to the MCU module, the input end of the driving voltage switching module is electrically connected to the MCU module, and the output end is electrically connected to the received signal amplification module; The MCU module is integrated with a DAC control unit, and the DAC control unit is used to output a DAC voltage control signal to the driving voltage switching module; After the MCU module detects the high level sent by the receiving signal detection module (9), it outputs a high control voltage through the DAC control unit, causing the driving voltage switching module to output a low voltage, thereby switching the laser ranging telescope to a close-range measurement mode; After the MCU module detects the low level sent by the receiving signal detection module (9), it outputs a low control voltage through the DAC control unit, causing the driving voltage switching module to output a high voltage, thereby switching the laser ranging telescope to a long-distance measurement mode; The driving voltage switching module comprises: a boost unit (1), a high voltage output unit (2), a high voltage detection unit (3), a voltage feedback unit (5), a filter unit (6), a DAC voltage adjustment unit (7) and a boost chip unit (8) which are electrically connected in sequence; The DAC voltage adjustment unit (7) comprises: a second resistor R2; The voltage feedback unit (5) comprises: a third resistor R3, a fourth resistor R4 and a second capacitor C2; The third resistor R3 is connected in series with the fourth resistor R4, and the second capacitor C2 is connected in parallel with the third resistor R3.

2. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 1 is characterized in that: The input end of the boost chip unit (8) is electrically connected to the MCU module, and the output end is electrically connected to the input end of the filter unit (6). The input end of the filter unit (6) is electrically connected to the input end of the DAC voltage regulation unit (7). The output end of the DAC voltage regulation unit (7) is electrically connected to the input end of the voltage feedback unit (5). The output end of the voltage feedback unit (5) is electrically connected to the input end of the boost chip unit (8). The output end of the boost chip unit (8) is electrically connected to the input end of the boost unit (1). The output end of the boost unit (1) is electrically connected to the input end of the high-voltage output unit (2). The output end of the high-voltage output unit (2) is connected to the input end of the high-voltage detection unit (3). The output end of the high-voltage detection unit (3) is connected to the MCU module and the receiving signal amplification module.

3. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 2 is characterized in that: The driving voltage switching module also includes: An ambient temperature detection unit (4); the ambient temperature detection unit (4) is electrically connected to the MCU module; The ambient temperature detection unit (4) comprises: a thermistor NTC, a seventh resistor R7, an eighth resistor R8, a seventh capacitor C7 and a second power supply; Among them, the thermistor NTC is connected to the eighth resistor R8, and the eighth resistor R8 is connected to the second power supply; the node between the thermistor NTC and the eighth resistor R8 is used as an output end, electrically connected to the seventh resistor R7 and the seventh capacitor C7; the seventh capacitor C7 is connected to the MCU module.

4. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 3 is characterized in that: The ambient temperature detection unit (4) is used to detect the ambient temperature of the receiving signal amplification module in real time, convert the ambient temperature into an electrical signal, and transmit the electrical signal to the MCU module; The MCU module compares the preset zero-compensation standard temperature with the ambient temperature, and compensates the voltage information output by the high-voltage output unit (2) according to a preset compensation coefficient, thereby obtaining the voltage information output by the driving voltage switching module; The compensation coefficient is 15mV / °C. For every degree increase in temperature, the voltage decreases by 15mV, and vice versa.

5. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 1 is characterized in that: The received signal detection module (9) comprises: an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12 and a second comparator chip U2; The tenth resistor R10 is connected to the ninth resistor R9, and the ninth resistor R9 is connected to the second power supply; the node between the tenth resistor R10 and the ninth resistor R9 is connected to the second comparator chip U2 and the ninth capacitor C9 as a first reference voltage node; the eleventh resistor R11 is connected to the twelfth resistor R12, and the twelfth resistor R12 is connected to the second power supply, the eighth capacitor C8 is connected to the eleventh resistor R11 in parallel, and the node between the eleventh resistor R11 and the eighth capacitor C8 and the twelfth resistor R12 is connected to the second comparator chip U2 as a second reference voltage node; the tenth capacitor C10 is connected to the second power supply and the second comparator chip U2.

6. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 2 is characterized in that: The boost chip unit (8) comprises: a first power supply, a high-voltage MOS tube Q1, a first inductor L1 and a fourth capacitor C4; The input end of the high-voltage MOS tube Q1 is connected to the output end of the boost chip unit (8), and the output end is connected to the high-voltage output unit (2); the first inductor L1 is connected to the fourth capacitor C4, and the first inductor L1, the first power supply and the fourth capacitor C4 are connected in parallel to the circuit formed by the boost chip unit (8) and the high-voltage MOS tube Q1.

7. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 2 is characterized in that: The high-voltage output unit (2) is a rectifier filter circuit composed of a diode D1 and a fifth capacitor C5; The high voltage detection unit (3) comprises: a fifth resistor R5, a sixth resistor R6 and a sixth capacitor C6; wherein the fifth resistor R5, the sixth resistor R6 and the sixth capacitor C6 are connected in series and in parallel.

8. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 6 is characterized in that: When the high-voltage MOS tube Q1 is turned on, the first inductor L1 short-circuits the first power supply, the first power supply charges the first inductor L1, the inductor current increases at a fixed slope, and the first inductor L1 starts to store energy; When the high-voltage MOS tube Q1 is turned off, the inductor current continues to flow along the original current direction, and the first inductor L1 prevents the current from decreasing, thereby generating a reverse electromotive force.

9. A laser ranging telescope, characterized in that: include: Optical components, used to collect target light and amplify the image; A laser generating component, used for generating and emitting laser pulses; Laser rangefinder telescope long and short distance fast switching system, used to quickly adjust the working voltage; A data processing component, used to process the received electrical signals and calculate the measurement results; User interface components to display measurement results and allow users to perform settings and controls; The laser ranging telescope long-distance and short-distance rapid switching system is the laser ranging telescope long-distance and short-distance rapid switching system according to any one of claims 1 to 8.

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