Long and short distance fast switching system of laser ranging telescope

Abstract

The invention relates to a long and short distance rapid switching system for a laser ranging telescope. The system comprises a received signal amplification module, a received signal detection module, a driving voltage switching module and an MCU module. The output end of the received signal amplification module is electrically connected with the input end of the received signal detection module, the output end of the received signal detection module is electrically connected with the MCU module, the input end of the driving voltage switching module is electrically connected with the MCU module, and the output end is electrically connected with the received signal amplification module; a DAC (Digital-to-Analog Converter) control unit is integrated in the MCU module, and outputs a high control voltage when detecting that the received signal detection module sends a high level, so that the driving voltage switching module outputs a low voltage, and at the moment, a close-range measurement mode is adopted; and when the MCU module detects that the received signal detection module sends a low level, the MCU module outputs a low control voltage, so that the driving voltage switching module outputs a high voltage, and at the moment, a long-distance measurement mode is adopted. According to the method, the response speed and the measurement precision of the laser ranging telescope are improved.

Description

Technical Field

[0001] The invention relates to the field of laser ranging, and in particular to a system for quickly switching between long and short distances of a laser ranging telescope. Background Art

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

[0003] In order to improve the measurement speed, most manufacturers of existing laser ranging telescopes will directly set a fixed receiving operating voltage, so that when switching between long-distance and short-distance measurements, they can get a quick response and obtain the measured distance. However, this method often sets a higher receiving operating voltage to meet the needs of long-distance measurements. When measuring short distances, it will cause signal saturation and overload, resulting in the inability to detect the real signal, which leads to poor short-distance measurement accuracy and large errors.

[0004] In order to improve the accuracy of laser ranging telescopes, the receiving working voltage is designed to automatically adapt to the measuring distance, so that the receiving 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 distance measurements, which sacrifices the measurement speed and seriously affects the measurement efficiency.

[0005] Therefore, there is an urgent need for a system for quickly switching between long and short distances for a laser ranging telescope. Summary of the invention

[0006] 1. Technical issues to be resolved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a laser ranging telescope long-distance and short-distance rapid switching system, which solves the technical problem that the existing long-distance and short-distance switching measurement has a slow response speed and seriously affects the measurement rate.

[0007] (II) Technical solution In order to achieve the above object, the main technical solutions adopted by the present invention include: In a first aspect, an embodiment of the present invention provides a system for quickly switching between long and short distances of a laser ranging telescope, comprising: Received signal amplification module, received signal detection module, drive voltage switching module and MCU module; The output end of the receiving signal amplification module is electrically connected to the input end of the receiving signal detection module, the output end of the receiving signal detection module 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 receiving 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, it outputs a high control voltage through the DAC control unit, so that the driving voltage switching module outputs a low voltage, and the laser ranging telescope is switched to a close-range measurement mode; After the MCU module detects the low level sent by the receiving signal detection module, it outputs a low control voltage through the DAC control unit, so that the driving voltage switching module outputs a high voltage, and the laser ranging telescope is switched to a long-distance measurement mode; The driving voltage switching module comprises: a boost unit, a high voltage output unit, a high voltage detection unit, a voltage feedback unit, a filtering unit, a DAC voltage regulating unit and a boost chip unit which are electrically connected in sequence.

[0008] Optionally, the input end of the boost chip unit is electrically connected to the MCU module, and the output end is electrically connected to the input end of the filter unit, the input end of the filter unit is electrically connected to the input end of the DAC voltage regulation unit, the output end of the DAC voltage regulation 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 receiving signal amplification module.

[0009] Optionally, the driving voltage switching module further includes: Ambient temperature detection unit; the ambient temperature detection unit is electrically connected to the MCU module; 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; 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.

[0010] Optionally, the ambient temperature detection unit 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 according to a preset compensation coefficient to obtain 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.

[0011] Optionally, the received signal detection module includes: 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.

[0012] Optionally, the boost chip unit includes: 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, 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 composed of the boost chip unit and the high-voltage MOS tube Q1.

[0013] Optionally, the DAC voltage adjustment unit includes: a second resistor R2; The voltage feedback unit includes: 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.

[0014] Optionally, the high voltage output unit is a rectifier filter circuit composed of a diode D1 and a fifth capacitor C5; The high voltage detection unit includes: 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.

[0015] Optionally, 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.

[0016] In a second aspect, an embodiment of the present invention provides a laser ranging telescope, comprising: 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 described in any one of the first aspects above.

[0017] (III) Beneficial effects The invention has the beneficial effects as follows: a laser ranging telescope long-distance and short-distance fast switching system of the invention comprises a receiving signal amplification module, a receiving signal detection module, a driving voltage switching module and an MCU module, and a DAC control unit for outputting a control signal to the driving voltage switching module is integrated in the MCU module, and in combination with the driving voltage switching module designed by the present application, the MCU module outputs a high control voltage through the DAC control unit after detecting a high level sent by the receiving signal detection module, so that the driving voltage switching module outputs a low voltage, and the laser ranging telescope is switched to a short-distance measurement mode; conversely, the driving voltage switching module outputs a high voltage, and the laser ranging telescope is switched to a long-distance measurement mode, thereby improving the long-distance and short-distance test response speed after switching the voltage during the ranging process; in addition, the long-distance and short-distance fast switching system of the invention can also collect signals sent by the ambient temperature detection unit, the receiving signal detection module and the high-voltage detection unit through the MCU module in cooperation with the DAC control unit during the measurement process, and 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, so that the received signal is in a state that is easy to process, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a system for quickly switching between long and short distances for a laser ranging telescope according to an embodiment of the present invention; Figure 2 is a response time diagram of a laser ranging telescope in the prior art; Figure 3This is a response time diagram of a laser ranging telescope in a laser ranging telescope in Example 3 of the present invention.

[0019] [Description of Reference Numerals] 1: Boost unit; 2: High voltage output unit; 3: High voltage detection unit; 4: Ambient temperature detection unit; 5: Voltage feedback unit; 6: Filter unit; 7: DAC voltage adjustment unit; 8: Boost chip unit; 9: Received signal detection module. DETAILED DESCRIPTION

[0020] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0021] The invention discloses a laser ranging telescope long-distance and short-distance fast switching system, which comprises a receiving signal amplifying module, a receiving signal detecting module, a driving voltage switching module and an MCU module, and a DAC control unit for outputting a control signal to the driving voltage switching module is integrated in the MCU module, and the driving voltage switching module designed in the present application is combined, so that after the MCU module detects a high level sent by the receiving signal detecting module, the DAC control unit outputs a high control voltage, so that the driving voltage switching module outputs a low voltage, and the laser ranging telescope is switched to a short-distance measurement mode; conversely, the driving voltage switching module outputs a high voltage, and the laser ranging telescope is switched to a long-distance measurement mode, thereby improving the long-distance and short-distance test response speed after the voltage is switched during the ranging process. In addition, during the measurement process, the long-distance and short-distance fast switching system of the invention can also collect signals sent by an ambient temperature detection unit, a receiving signal detection module and a high-voltage detection unit through the MCU module in cooperation with the DAC control unit, and 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, so that the received signal is in a state that is easy to process, thereby improving the measurement accuracy.

[0022] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying 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 clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0023] Example 1

[0024] See also Figure 1 A laser ranging telescope long-distance and short-distance rapid switching system according to an embodiment of the present invention comprises: Received signal amplification module, received signal detection module 9, drive voltage switching module and MCU module; The output end of the receiving signal amplification module is electrically connected to the input end of the receiving signal detection module 9, the output end of the receiving 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 receiving signal amplification module; The MCU module is integrated with a DAC control unit, which 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, 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, and switching the laser ranging telescope to a long-distance measurement mode.

[0025] In the specific implementation process, the receiving signal amplifying module receives the reflected signal, and sends the reflected signal to the receiving signal detection module 9 after filtering. The receiving signal detection module determines whether the voltage of the currently received signal is greater than the preset comparison voltage after the preset reference voltage is superimposed.

[0026] 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, so that the driving voltage switching module outputs a low voltage, thereby switching the laser ranging telescope to the close-range measurement mode; 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, so that the driving voltage switching module outputs a high voltage, thereby switching the laser ranging telescope to the long-distance measurement mode.

[0027] Among them, the range of low voltage and high voltage is 60-120V, the range of low voltage control signal is 0.8V~1.2V, the range of high voltage control signal is 1.2V~2V, and the high level and low level can also be changed accordingly according to the actual distance measurement, laser power and measurement distance. When the driving voltage switching module receives a low control voltage, it outputs the lowest low voltage of 60V, and when the driving voltage switching module receives a high control voltage, it outputs the highest high voltage of 120V. After that, the voltage can be fine-tuned according to the waveform characteristics, thereby improving the measurement distance and the measurement accuracy.

[0028] Specifically, voltage fine-tuning according to waveform characteristics includes: When the DAC control unit outputs a low control voltage, the lowest gear of the low control voltage is output, and the output end of the high voltage output unit 2 outputs the maximum driving voltage value. At this time, it is switched to the long-distance measurement mode. The MCU module obtains the signal waveform returned by the measured target under the current maximum driving voltage value. If the pulse width of the acquired waveform signal is zero, the maximum driving voltage value is directly used for measurement. If the pulse width of the acquired waveform signal is greater than zero, the MCU module increases the output voltage of the DAC control unit, and then reduces the output voltage of the output end of the high voltage output unit 2 until the pulse width of the returned waveform is zero, and then stops adjusting; if the acquired waveform signal is very weak and has exceeded the range, an over-range prompt is output; When the DAC control unit outputs a high control voltage, the highest gear of the high control voltage is output, and the output end of the high voltage output unit 2 outputs the minimum driving voltage value. At this time, it switches to the close-range measurement mode. The MCU module obtains the signal waveform returned by the measured target under the current minimum driving voltage value. If the acquired waveform signal is weak and less than the preset threshold (the threshold is different depending on the range), the MCU module reduces the output voltage of the DAC control unit, and then increases the output voltage of the output end of the high voltage output unit 2 until the acquired waveform signal is greater than or equal to the preset threshold. The adjustment is stopped and the corresponding measurement result is output; if the signal acquired by 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.

[0029] When ambient temperature voltage compensation and high voltage output feedback compensation are required, the voltage output by the DAC control unit is superimposed with the ambient temperature compensation voltage and the high voltage output compensation voltage.

[0030] Specifically, the MCU module collects the level signal data sent by the receiving signal detection module 9, specifically including: A circular data buffer with a length of 20 is established. Each time a new level signal data sampling value sent by the receiving signal detection module 9 is obtained, a weight of 3:7 is assigned according to the latest collected data and 19 historical data, among which 19 historical weights are evenly distributed with a weight of 70%, which can effectively suppress random interference while retaining the rapid change characteristics of the signal. The sampling sequence is dynamically maintained by adopting 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. The MCU module processing method can increase the step response speed by 25%, and the ability to suppress pulse noise is enhanced by 40%.

[0031] The DAC control unit adopts a dynamic DAC control method, which specifically includes 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 close-distance maximum value, 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 long-distance minimum value, the minimum value 0 is output to trigger the low voltage output of 0.8V of the DAC control unit.

[0032] According to the level signal data sent by the receiving signal detection module 9, the formula for controlling the DAC output value is: ; Among them, V max The maximum output level is 2V, V min The minimum output level is 0.8V, V0 is the reference level 1.2V, V in It is the level signal data sent by the receiving signal detection module 9.

[0033] The driving voltage switching module includes: 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; 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.

[0034] Among them, the DAC voltage adjustment unit 7 is the second resistor R2, and the DAC voltage is connected to the FB pin of the boost chip unit 8 through the second resistor R2, and the distance measured according to the design of the ranging telescope and the distance of the received return laser are determined to determine the range of the DAC adjustment RX-HV voltage.

[0035] The driving voltage switching module also includes: Ambient temperature detection unit 4; the ambient temperature detection unit 4 is electrically connected to the MCU module; 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; 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, electrically connected to the seventh resistor R7 and the seventh capacitor C7; the seventh capacitor C7 is connected to the MCU module.

[0036] 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 the preset compensation coefficient, and obtains the voltage information output by the driving voltage switching module; The compensation coefficient is 15mV / ℃. For every degree increase in temperature, the voltage decreases by 15mV, and vice versa.

[0037] Specifically, the ambient temperature detection unit 4 detects the ambient temperature of the receiving signal amplification module, and converts the temperature into an electrical signal and sends it to the MCU module. The MCU module analyzes the ADC signal sent by the high-voltage output unit 2 and the ambient temperature detection unit, and combines the waveform signal characteristics of the target object received by the signal receiving and amplifying module to fine-tune the voltage output by the driving voltage switching module to meet the needs of different measurement distances.

[0038] Furthermore, the received signal detection module 9 includes: 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 used as a first reference voltage node to connect the second comparator chip U2 and the ninth capacitor C9; 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 in parallel, and the node between the eleventh resistor R11 and the eighth capacitor C8 and the twelfth resistor R12 is used as a second reference voltage node to connect the second comparator chip U2; the tenth capacitor C10 is connected to the second power supply and the second comparator chip U2.

[0039] In this embodiment, the boost chip unit 8 includes: 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 composed of the boost chip unit 8 and the high-voltage MOS tube Q1.

[0040] In a specific implementation process, the DAC voltage adjustment unit 7 includes: a second resistor R2; The voltage feedback unit 5 includes: a third resistor R3, a fourth resistor R4 and a second capacitor C2; The third resistor R3 and the fourth resistor R4 are connected in series, and the second capacitor C2 and the third resistor R3 are connected in parallel.

[0041] The filter unit 6 is an RC filter circuit composed of a first resistor R1 and a first capacitor C1 connected in series, and is used to filter out high-frequency noise; In this embodiment, 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 includes: 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.

[0042] Furthermore, the boost unit 1 includes a high-voltage MOS tube Q1, a first inductor L1 and a fourth capacitor C4. When the high-voltage MOS tube Q1 is turned on, it is equivalent to short-circuiting the first power supply with an inductor, and the inductor current will increase at a fixed slope, and the first inductor L1 is storing energy. When the high-voltage MOS tube 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 will prevent its current from decreasing, and a reverse electromotive force VL will be generated to achieve boosting.

[0043] 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.

[0044] The laser ranging telescope long-distance and short-distance rapid switching system of the present embodiment greatly improves the ranging speed and response speed of the laser ranging telescope, effectively avoids the problems of poor measurement accuracy and large errors during close-distance measurement, and improves the measurement accuracy.

[0045] Example 2

[0046] The laser ranging telescope long-distance and short-distance rapid switching system in this embodiment is the laser ranging telescope long-distance and short-distance rapid switching system in Example 1, which will not be described here in detail, and only the information flow will be described.

[0047] In a specific implementation process, a laser ranging telescope long-distance and short-distance rapid switching system of this embodiment has a circuit flow as follows: The adjustment range of the RX-HV voltage is determined based on the distance measured by the design of the range-finding telescope and the intensity of the received return laser. A first power supply and a second power supply are connected to the circuit, and both the first power supply and the second power supply are 3.3V power supplies; after the power supply is connected, the DAC control unit outputs a DAC signal for controlling the RX-HV voltage output; The DAC signal passes through the filter unit 6 to filter out high-frequency noise from the DAC signal, making the DAC voltage signal more stable; The DAC signal after the filter unit 6 passes through the DAC voltage adjustment unit 7 and is input to the FB pin of the boost chip unit 8; The boost chip unit 8 sends a boost control signal through the EXT pin, thereby controlling the on and off of the high-voltage MOS tube Q1 in the boost circuit; when the high-voltage MOS tube Q1 is turned on, the first power supply forms a loop, 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 tube 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 will generate a reverse electromotive force VL. After the reverse electromotive force VL is superimposed on the first power supply, it is 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; After the RX-HV voltage is generated, 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, and the MCU module adjusts the output signal of the DAC according to the feedback information; By inputting the RX-HV voltage into the voltage feedback unit 5 and dividing the voltage 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 the high-frequency noise. The voltage feedback unit 5 can prevent the MCU module from being unstable during the reset phase, which may cause the RX-HV voltage to be too high and burn out the components.

[0048] The ambient temperature detection unit 4 acquires the ambient temperature, converts it into a signal and sends it to the MCU module. The MCU module performs real-time temperature compensation according to the acquired ambient temperature signal.

[0049] The present invention has a short stabilization time when performing voltage switching, and compared with the existing laser ranging telescope, the ranging speed and response speed of the laser ranging telescope are greatly improved; in addition, the present invention can directly adjust the RX-HV voltage in real time during the measurement process, effectively avoiding the saturation of close-range signals caused by the use of a fixed voltage, resulting in the inability to detect the real signal, thereby causing the problem of poor close-range measurement accuracy and large errors; further, the present invention solves the problem of long stabilization time for adjusting the RX-HV power supply, and the voltage can be adjusted in real time during the measurement process to make the received signal in a linear region, thereby improving the measurement accuracy.

[0050] Example 3

[0051] An embodiment of the present invention provides a laser ranging telescope, comprising: 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 described in any one of Example 1 and Example 2.

[0052] In a specific implementation process, the optical component includes an objective lens and an eyepiece, which are used to collect target light and magnify the image; the objective lens is responsible for collecting target light from a distance, while the eyepiece helps the user observe the magnified image.

[0053] The laser emission assembly consists of a laser diode and associated drive circuitry. The laser diode generates and emits laser pulses that are directed toward the target object.

[0054] 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 described in any one of Example 1 and Example 2.

[0055] The data processing component includes a microprocessor or FPGA to process the received electrical signals and calculate the measurement results.

[0056] The user interface assembly includes an LCD display and buttons or a touch screen, the display is used to display the measurement results, and the buttons or the touch screen are used to allow the user to set up and control.

[0057] The laser ranging telescope in this embodiment is a portable optoelectronic instrument. Its laser emission power is safe for human eyes, does not require matching targets, and can measure the distance of any target. It is small in size, light in weight, and easy to carry.

[0058] On the other hand, the laser ranging telescope of this embodiment adopts the laser ranging telescope long-distance and short-distance rapid switching system described in any one of Embodiment 1 and Embodiment 2, which improves the response speed of the laser ranging telescope. Figure 2 and Figure 3 As shown, the laser ranging telescope without the laser ranging telescope long-distance fast switching system in this embodiment has a response speed of 80ms, while the laser ranging telescope equipped with the laser ranging telescope long-distance fast switching system in this embodiment improves the response speed, and its response speed reaches 6ms.

[0059] The laser rangefinder telescope in this embodiment is widely used in the installation of power equipment. The whole system is equipped with scanning and measuring functions, which can easily identify small targets in the distance, such as electric wires, electric wire towers, etc. Furthermore, the laser rangefinder telescope in this embodiment can be applied to various outdoor measurements such as highways, municipal engineering, forestry survey and design, construction, network planning and survey equipment, communication maintenance, and golf and other personal outdoor sports enthusiasts.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify 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.

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 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.

8. 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.

9. The laser ranging telescope long-distance and short-distance rapid switching system according to claim 6, 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.

10. 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 9.

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