Novel laser range finder

Abstract

According to the technical scheme, the novel laser range finder comprises a range finder body, the range finder body is provided with a control part, a range finding part, an acousto-optic part and a power supply part, the range finding part, the acousto-optic part and the power supply part are matched with the control part, and the control part comprises an MCU control circuit and a switch button circuit. The MCU control circuit is provided with a single-chip microcomputer U3 electrically connected with the MCU control circuit, the switch button circuit is provided with a control switch K1 and a control button S1 electrically connected with the single-chip microcomputer U3, the range finder body is further provided with a communication part matched with the control part, and the communication part comprises a Bluetooth communication circuit electrically connected with the MCU control circuit. The Bluetooth communication circuit comprises a Bluetooth communication chip U5, a Bluetooth antenna ANT1 and a PMOS tube Q8, wherein the Bluetooth antenna ANT1 and the PMOS tube Q8 are electrically connected with the Bluetooth communication chip U5. The device has the advantages of being simple in structure, having the Bluetooth function, transmitting and storing the measured quantity in real time, saving time and labor, having the projection effect, and improving the accuracy and convenience of distance measurement.

Description

Technical Field

[0001] The utility model relates to a rangefinder, in particular to a novel laser rangefinder. Background Art

[0002] A laser rangefinder is an instrument that uses modulated laser parameters to measure the distance to a target. During use, a worker typically holds the rangefinder with the laser head pointing toward the object being measured. The rangefinder then calculates the distance from the laser head to the object.

[0003] However, when measuring distance, the existing laser rangefinder can only temporarily store the measurement data in the rangefinder, which means that the user can only record the relevant measurement data manually, which is time-consuming and labor-intensive, affecting the user experience. At the same time, the existing laser rangefinder has the problem that it is difficult for the user to quickly capture the position of the target object during use.

[0004] At the same time, when using the existing laser rangefinder, since the user is far away from the distance measurement target object, the laser rangefinder cannot quickly and accurately capture the position of the distance measurement target object, thereby reducing the accuracy and convenience of laser ranging.

[0005] Therefore, it is very necessary to improve the existing laser rangefinder. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the utility model provides a new type of laser rangefinder with a simple structure. By setting a Bluetooth communication circuit, the rangefinder body has a Bluetooth function and can be connected to a host computer, and the measured quantity is transmitted and stored in real time, which saves time and effort. At the same time, an auxiliary projection circuit is provided so that the rangefinder body has a projection effect, which makes it easier for users to quickly capture the distance measurement target object during the distance measurement process, thereby improving the accuracy and convenience of the distance measurement.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a novel laser rangefinder, comprising a rangefinder body, the rangefinder body being provided with a control part and a ranging part, an acousto-optic part and a power supply part adapted to the control part, the control part comprising an MCU control circuit and a switch button circuit electrically connected to the MCU control circuit, the MCU control circuit being provided with a single-chip microcomputer U3 electrically connected thereto, the switch button circuit being provided with a control switch K1 and a control button S1 electrically connected to the single-chip microcomputer U3, the rangefinder body being further provided with a communication part adapted to the control part, the communication part comprising a Bluetooth communication circuit electrically connected to the MCU control circuit, the Bluetooth communication circuit comprising a Bluetooth communication chip U5 and a Bluetooth antenna ANT1 and a PMOS tube Q8 electrically connected to the Bluetooth communication chip U5.

[0008] By adopting the above technical solution, the rangefinder body is equipped with Bluetooth function by adding a Bluetooth communication circuit, so that the rangefinder body can communicate with a host computer such as a mobile phone APP to achieve the effect of real-time transmission and storage of measurement data.

[0009] The utility model is further configured as follows: the ranging part includes a ranging control circuit and a three-axis phase sensing circuit adapted to the ranging control circuit; the ranging control circuit includes an NPN transistor Q19, a PMOS transistor Q18 and a laser ranging module J2 electrically connected to each other; the three-axis phase sensing circuit is provided with a three-axis phase sensor U4 electrically connected to the single-chip microcomputer U3; the three-axis phase sensor U4 is electrically connected to the single-chip microcomputer U3 through an SDA port and an SCL port.

[0010] By adopting the above technical solution, the ranging control circuit performs laser ranging on the distance between the rangefinder body and the measurement target by controlling the operating state of the laser ranging module J2. The three-axis phase sensing circuit senses whether the position of the rangefinder body has changed, and plays an auxiliary role in the ranging control circuit. When the position of the rangefinder body changes, it can prompt the ranging control circuit to re-measure the distance in a timely manner, thereby improving the accuracy of the ranging result of the rangefinder body.

[0011] The utility model is further configured as follows: the sound and light part is provided with an information display circuit and a sound prompt circuit adapted to the information display circuit, the information display circuit includes a PMOS tube Q13 and an LCD display screen J1 electrically connected to the PMOS tube, and the sound prompt circuit is provided with an NPN transistor Q15 and a buzzer LS1 electrically connected to the NPN transistor Q15.

[0012] By adopting the above technical solution, the LCD display screen J1 is used to display the working status of the body and the distance measurement result data, which is convenient for users to use. The buzzer LS1 generates a prompt sound when the working status of the rangefinder body changes, which is convenient for users to use.

[0013] The utility model is further configured as follows: the power supply part is provided with a battery circuit and a charging control circuit and an LDO power supply circuit electrically connected to the battery circuit; the battery circuit is provided with a battery interface BAT and a lithium battery detachably connected to the battery interface BAT.

[0014] By adopting the above technical solution, the lithium battery generates the battery voltage VBAT used for charging or discharging through the battery interface BAT. The lithium battery has a built-in thermistor. The microcontroller U3 is connected to the battery interface BAT through the VBAT_TEMP port to detect the battery temperature. The charging control circuit controls and manages the charging process of the lithium battery.

[0015] The utility model is further configured as follows: the charging control circuit is provided with a USB charging sub-circuit and a charging control sub-circuit electrically connected to each other; the USB charging sub-circuit is provided with a charging interface USB1 and a power management chip U8 electrically connected to each other; the USB charging sub-circuit generates a charging power supply voltage VCC through the charging structure USB1 and the power management chip U8; the charging control sub-circuit is provided with an NMOS tube Q14, a PMOS tube Q1, resistors R6, R13 and a power management chip U2 electrically connected to each other; the charging control sub-circuit generates a battery voltage VBAT through the power management chip U2; the charging control sub-circuit is further provided with resistors R9, R11 and an NMOS tube Q2 electrically connected to the power management chip U2.

[0016] By adopting the above technical solution, the charging interface USB1 makes it convenient for users to charge the rangefinder body. The USB charging sub-circuit generates a charging power supply voltage VCC through the charging structure USB1 and the power management chip U8. The microcontroller U3 controls the NMOS tube Q14 and the PMOS tube Q1 to be turned on through the OV_CHG port, so that the power management chip U2 outputs the battery voltage VBAT and the lithium battery is charged. At the same time, the microcontroller U3 controls the on and off of the NMOS tube Q2 through the PROG_EN port, thereby changing the resistance value at pin 2 of the power management chip U2 and thus controlling the size of the charging current. The microcontroller U3 also controls whether the power management chip U2 is working through the CHG_EN port, and reads the charging status of the power management chip U2 through the CHG port.

[0017] The utility model is further configured as follows: the LDO power supply circuit is provided with a voltage stabilizing subcircuit and a charging power supply subcircuit and a battery power supply subcircuit electrically connected to the voltage stabilizing subcircuit; the voltage stabilizing subcircuit is provided with an LDO voltage stabilizing chip U1; the voltage stabilizing subcircuit outputs a regulated power supply voltage VCCMCU after being stabilized by the LDO voltage stabilizing chip U1; the input end of the charging power supply subcircuit is electrically connected to the charging power supply voltage VCC, and the output end is electrically connected to the input end of the LDO voltage stabilizing chip U1; and the battery power supply subcircuit is provided with a PMOS tube Q3.

[0018] By adopting the above technical solution, the voltage stabilization sub-circuit stabilizes the charging power supply voltage VCC input by the charging power supply sub-circuit or the battery voltage VBAT input by the battery power supply sub-circuit through the LDO voltage regulator chip U1, and then outputs a regulated power supply voltage VCCMCU. The regulated power supply voltage VCCMCU provides a stable operating voltage for each chip in the rangefinder body, so that each chip in the rangefinder body can operate normally when charging or the battery is charged. The battery power supply sub-circuit controls the on-off of the PMOS tube Q3 through the VBAT_IN port, thereby controlling whether the battery voltage VBAT supplies power to the input end of the LDO voltage regulator chip U1. The VBAT_IN port is driven and controlled by the PWR_ON port of the microcontroller U3. That is, when the rangefinder body is charging, the microcontroller U3 controls the PMOS tube Q3 to turn off, and the battery voltage VBAT stops supplying power to the LDO voltage regulator chip. Conversely, when not charging, the PMOS tube is turned on, and the battery voltage VBAT continues to supply power to the LDO voltage regulator chip U1.

[0019] The utility model is further configured as follows: the power supply part also includes a battery detection circuit and a charging detection circuit electrically connected to the MCU control circuit, the battery detection circuit is provided with an NMOS tube Q9, resistors R33, and R38 electrically connected to each other, and the charging detection circuit is provided with an NMOS tube Q10.

[0020] By adopting the above technical solution, the battery voltage VBAT is sampled to determine the stability of the battery voltage VBAT. The change in the charging power supply voltage VCC generated by the charging of the power supply part controls whether the NMOS transistor Q10 is turned on or off. Then, the CHG_DET port is used to detect whether the power supply part is charging, thereby ensuring the normal operation of the power supply part.

[0021] The utility model is further configured as follows: the communication part also includes an MCU burning circuit and a Bluetooth burning circuit electrically connected to the MCU control circuit and the Bluetooth communication circuit respectively, the MCU burning circuit is provided with an MCU burning interface J6, and the Bluetooth burning circuit is provided with a Bluetooth burning interface J7.

[0022] By adopting the above technical solution, the operating program of the microcontroller U3 is burned through the MCU burning interface J7, which facilitates the normal use of the MCU control circuit. The operating program of the Bluetooth communication chip U5 is burned through the Bluetooth burning interface J7, which facilitates the use of the Bluetooth communication circuit.

[0023] The present invention is further configured as follows: the distance measuring part further includes an auxiliary projection circuit, and the auxiliary projection circuit is provided with an NPN transistor Q17, a PMOS transistor Q7 and a projection module J4 electrically connected to each other.

[0024] By adopting the above technical solution, the microcontroller U3 controls the NPN transistor Q17 and the PMOS transistor Q7 to be turned on through the +LR_EN port (pin 33), so that the projection module J4 can project, thereby facilitating the user to quickly capture the target object during the ranging process, thereby improving the accuracy and convenience of ranging.

[0025] The utility model is further configured as follows: the communication part is also provided with any one of a WIFI communication circuit, a Zigbee communication circuit, a LoRa communication circuit, and a NB-loT communication circuit; the WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit can all be connected to the host computer via wireless communication; the WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit are respectively provided with a WIFI module, a Zigbee module, a LoRa module, and a NB-loT module.

[0026] By adopting the above technical solution, the reliability of the communication part in the rangefinder body and the user convenience are improved through WIFI communication circuit, Zigbee communication circuit, LoRa communication circuit and NB-loT communication circuit.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. By adding a Bluetooth communication circuit, the rangefinder body has Bluetooth function, so that the rangefinder body can communicate with the host computer such as the mobile phone APP to achieve the effect of real-time transmission and storage of measurement data;

[0029] 2. By adding an auxiliary projection circuit, the rangefinder body has a projection effect, which makes it easier for users to quickly capture the target object during the ranging process, thereby improving the accuracy and convenience of ranging. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a circuit principle block diagram of Example 1.

[0031] Figure 2 for Figure 1 Circuit schematic diagram of the MCU control circuit.

[0032] Figure 3 for Figure 1 The circuit schematic diagram of the switch button circuit.

[0033] Figure 4 for Figure 1 Circuit diagram of the ranging control circuit.

[0034] Figure 5 for Figure 1 Circuit schematic diagram of the three-axis phase sensing circuit.

[0035] Figure 6 for Figure 1 The information in the figure shows the circuit schematic diagram of the circuit.

[0036] Figure 7 for Figure 1 Circuit schematic diagram of the sound prompt circuit.

[0037] Figure 8 for Figure 1 Circuit diagram of the battery circuit.

[0038] Figure 9 for Figure 1 Circuit diagram of the USB charging sub-circuit.

[0039] Figure 10 for Figure 1 Circuit schematic diagram of the charging control subcircuit.

[0040] Figure 11 for Figure 1 The schematic diagram of the LDO power supply circuit.

[0041] Figure 12 for Figure 1 Figure 2. Schematic diagram of the battery detection circuit.

[0042] Figure 13 for Figure 1 Circuit schematic diagram of the charging detection circuit.

[0043] Figure 14 for Figure 1 Circuit schematic diagram of the Bluetooth communication circuit.

[0044] Figure 15 for Figure 1 The circuit schematic diagram of the MCU burning circuit.

[0045] Figure 16 for Figure 1 The circuit schematic diagram of the Bluetooth burning circuit.

[0046] Figure 17 This is a circuit principle block diagram of embodiment 2

[0047] Figure 18 for Figure 17 Circuit schematic diagram of the auxiliary projection circuit.

[0048] Figure numerals: 1. Control part; 11. MCU control circuit; 12. Switch button circuit; 2. Distance measurement part; 21. Distance measurement control circuit; 22. Three-axis phase sensing circuit; 23. Auxiliary projection circuit; 3. Sound and light part; 31. Information display circuit; 32. Sound prompt circuit; 4. Power supply part; 41. Battery circuit; 42. Charging control circuit; 421. USB charging sub-circuit; 422. Charging control sub-circuit; 43. LDO power supply circuit; 431. Voltage stabilization sub-circuit; 432. Charging power supply sub-circuit; 433. Battery power supply sub-circuit; 44. Battery detection circuit; 45. Charging detection circuit; 5. Communication part; 51. Bluetooth communication circuit; 52. MCU burning circuit; 53. Bluetooth burning circuit. DETAILED DESCRIPTION

[0049] The present invention will be described in further detail below with reference to the accompanying drawings.

[0050] Example 1: This embodiment discloses a new type of laser rangefinder, such as Figure 1 As shown, the rangefinder body includes a control part 1 and a distance measuring part 2, an acousto-optic part 3 and a power supply part 4 adapted to the control part 1. The rangefinder body is also provided with a communication part 5 adapted to the control part 1.

[0051] like Figure 2 and 3 As shown, the control part 1 includes an MCU control circuit 11 and a switch button circuit 12 electrically connected to the MCU control circuit 11. The MCU control circuit 11 is provided with a single-chip microcomputer U3 electrically connected thereto. The MCU control circuit 11 plays a comprehensive control and processing role on the rangefinder body through the single-chip microcomputer U3. The switch button circuit 12 is provided with a control switch K1 and a control button S1 electrically connected to the single-chip microcomputer U3. The switch button circuit 12 controls the working state of the single-chip microcomputer U3 through the control switch K1 and the control button S1.

[0052] The single-chip computer U3 adopts the BAT32G135GE40NB type medium-micro ultra-low-power multi-function microcontroller, which integrates an A / D converter, a temperature sensor, a comparator, and a programmable gain amplifier. The A / D converter can be used to collect external sensor signals and cooperate with the ADC detection circuit to reduce the system design cost; the temperature sensor can realize real-time monitoring of the external ambient temperature; the comparator integrated in the chip can support high-speed and low-speed working modes, and can be used for battery monitoring in low-speed mode; it also has excellent low-power performance, supports two low-power modes, sleep and deep sleep, and has a flexible design suitable for battery-powered low-power devices.

[0053] like Figure 4 and 5As shown, the ranging part 2 includes a ranging control circuit 21 and a three-axis phase sensing circuit 22 adapted to the ranging control circuit 21. The ranging control circuit 21 performs laser ranging on the distance between the rangefinder body and the measurement target. The three-axis phase sensing circuit 22 senses whether the position of the rangefinder body has changed, thereby assisting the ranging control circuit 21. When the position of the rangefinder body changes, it can prompt the ranging control circuit 21 to re-measure the distance in a timely manner, thereby improving the accuracy of the ranging result of the rangefinder body.

[0054] like Figure 4 As shown, the ranging control circuit 21 includes an NPN transistor Q19, a PMOS transistor Q18 and a laser ranging module J2 that are electrically connected to each other. The single-chip microcomputer U3 controls whether the laser ranging module J2 performs the laser ranging working state through the POWEN port (pin 31), and then the single-chip microcomputer U3 controls the on and off of the NPN transistor Q19 and the PMOS transistor Q18 through the LR_EN port (pin 36), thereby controlling whether the laser ranging module J2 performs the laser ranging result signal transmission. When the laser ranging result signal is transmitted, the laser ranging result signal is transmitted to the single-chip microcomputer U3 through the TX1 port (pin 37) and RX1 port (pin 38) of the single-chip microcomputer U3 for comprehensive control processing.

[0055] like Figure 5 As shown, the three-axis phase sensing circuit 22 is provided with a three-axis phase sensor U4 electrically connected to the single-chip microcomputer U3. The three-axis phase sensor U4 is electrically connected to the single-chip microcomputer U3 through the SDA port and the SCL port, thereby transmitting the position information sensed by the three-axis phase sensor U4 to the single-chip microcomputer U3 for comprehensive control processing. The three-axis phase sensor U4 uses the DA28EC type. The three-axis phase sensor is a sensor that can measure the phase change of an object in three directions (X, Y, and Z axes). It combines the functions of multiple sensors such as accelerometers, gyroscopes, and magnetometers. By sensing the tiny vibrations of the object in three directions and converting them into electrical signals, it measures acceleration and velocity, and then senses whether the position of the rangefinder body changes during ranging.

[0056] like Figure 6 and 7As shown, the sound and light part 3 is provided with an information display circuit 31 and a sound prompt circuit 32 adapted to the information display circuit 31. The information display circuit 31 includes a PMOS transistor Q13 and an LCD display screen J1 electrically connected to the PMOS transistor. The single-chip microcomputer U3 controls the on-off of the PMOS transistor Q13 through the BLK_EN port (pin 34), thereby controlling whether the LCD display screen J1 is displaying. In addition, the single-chip microcomputer U3 controls the LCD display screen J1 to display various information of the rangefinder body through the LCD_SCLK port, LCD_SDO, LCD_CS, and LCD_RSI port. The LCD display screen J1 is used to display the working status of the body and the ranging result data for user convenience. The sound prompt circuit 32 is provided with an NPN transistor Q15 and a buzzer LS1 electrically connected to the NPN transistor Q15. The single-chip microcomputer U3 controls the on-off of the NPN transistor Q15 through the BEEP port (pin 13) to drive the buzzer LS1 to produce a prompt sound indicating the change of the working status of the rangefinder body, for user convenience.

[0057] like Figures 8 to 11 As shown, the power supply part 4 is provided with a battery circuit 41 and a charging control circuit 42 and an LDO power supply circuit 43 electrically connected to the battery circuit 41 .

[0058] like Figure 8 As shown, the battery circuit 41 is provided with a battery interface BAT and a lithium battery detachably connected to the battery interface BAT. The lithium battery generates a battery voltage VBAT used for charging or discharging through the battery interface BAT. The lithium battery has a thermistor inside. The microcontroller U3 is connected to the battery interface BAT through the VBAT_TEMP port (pin 27) to detect the battery temperature.

[0059] like Figure 9 and 10 As shown, the charging control circuit 42 is provided with a USB charging sub-circuit 421 and a charging control sub-circuit 422 which are electrically connected to each other.

[0060] like Figure 9 As shown, the USB charging sub-circuit 421 is provided with a charging interface USB1 and a power management chip U8 that are electrically connected to each other. The power management chip U8 adopts the HP2604 power IC. The charging interface USB1 facilitates the user to charge the rangefinder body. The USB charging sub-circuit 421 generates a charging power supply voltage VCC through the charging structure USB1 and the power management chip U8.

[0061] like Figure 10As shown, the charging control sub-circuit 422 is provided with an NMOS tube Q14, a PMOS tube Q1, resistors R6, R13 and a power management chip U2 electrically connected to each other. The power management chip U2 adopts the HP4556 battery linear charging IC. The single-chip microcomputer U3 controls the on-off of the NMOS tube Q14 and the PMOS tube Q1 through the OV_CHG port (pin 35) to generate a charging input voltage VCHG input to the pin 4 of the power management chip U2. When the single-chip microcomputer U3 gives a high-level signal through the OV_CHG port, the NMOS tube Q14 is turned on, and the resistors R6 and R13 divide the voltage to generate a low-level signal, and the PMOS tube Q1 is turned on to obtain the charging input voltage VCHG so that the power management chip U2 outputs the battery voltage VBAT. The lithium The battery is charged. Conversely, if the OV_CHG port gives a low-level signal, the NMOS tube Q14 is not turned on, and the corresponding PMOS tube Q1 is also not turned on. The power management chip U2 stops outputting the battery voltage VBAT, that is, the lithium battery stops charging. The charging control sub-circuit 422 is also provided with resistors R9, R11 and NMOS tube Q2 electrically connected to the power management chip U2. The microcontroller U3 controls the on and off of the NMOS tube Q2 through the PROG_EN port (pin 19), thereby changing the resistance value at pin 2 of the power management chip U2 and thus controlling the size of the charging current. The microcontroller U3 also controls whether the power management chip U2 is working through the CHG_EN port (pin 22), and reads the charging status of the power management chip U2 through the CHG port (pin 7).

[0062] like Figure 11As shown, the LDO power supply circuit 43 is provided with a voltage stabilizing sub-circuit 431 and a charging power supply sub-circuit 432 and a battery power supply sub-circuit 433 electrically connected to the voltage stabilizing sub-circuit 431. The voltage stabilizing sub-circuit 431 is provided with an LDO voltage stabilizing chip U1. The LDO voltage stabilizing chip U1 adopts an LP3993 ultra-low power LDO voltage regulator. The voltage stabilizing sub-circuit 431 stabilizes the charging power supply voltage VCC input by the charging power supply sub-circuit 432 or the battery voltage VBAT input by the battery power supply sub-circuit 433 through the LDO voltage stabilizing chip U1 and then outputs a regulated power supply voltage VCCMCU. The regulated power supply voltage VCCMCU provides a stable operating voltage for each chip in the rangefinder body, so that the rangefinder body Each chip can work normally when charging or the battery is charged. The input end of the charging power supply circuit 432 is electrically connected to the charging power supply voltage VCC, and the output end is electrically connected to the input end of the LDO voltage regulator chip U1. The battery power supply circuit 433 is provided with a PMOS tube Q3. The battery power supply circuit 433 controls the on and off of the PMOS tube Q3 through the VBAT_IN port, thereby controlling whether the battery voltage VBAT supplies power to the input end of the LDO voltage regulator chip U1. The VBAT_IN port is driven and controlled by the PWR_ON port (pin 30) of the microcontroller U3. That is, when the rangefinder body is charging, the microcontroller U3 controls the PMOS tube Q3 to be turned off, and when not charging, the PMOS tube is turned on.

[0063] like Figure 12 and 13 As shown, the power supply part 4 also includes a battery detection circuit 44 and a charging detection circuit 45 electrically connected to the MCU control circuit 11. The battery detection circuit 44 is provided with an NMOS transistor Q9, resistors R33, and R38 electrically connected to each other. The microcontroller U3 controls the on and off of the NMOS transistor Q9 through the BAT_EN port (pin 25). When the NMOS transistor is turned on, the resistors R33 and R38 divide the battery voltage VBAT, so that the microcontroller U3 samples the battery voltage VBAT through the BAT_ADC port (pin 26). The charging detection circuit 45 is provided with an NMOS transistor Q10. That is, the change in the charging power supply voltage VCC generated by whether the power supply part 4 is charging controls whether the NMOS transistor Q10 is turned on or off, so that the microcontroller U3 can detect whether the power supply part 4 is charging through the CHG_DET port (pin 6), thereby ensuring the normal operation of the power supply part 4.

[0064] like Figure 14As shown, the communication part 5 includes a Bluetooth communication circuit 51 electrically connected to the MCU control circuit 11, and the Bluetooth communication circuit 51 includes a Bluetooth communication chip U5 and a Bluetooth antenna ANT1 and a PMOS tube Q8 electrically connected to the Bluetooth communication chip U5. The Bluetooth antenna ANT1 facilitates the Bluetooth communication chip U5 to send and receive signals. The microcontroller U3 drives the PMOS tube Q8 through the BLE_ON port (pin 24) to control whether Bluetooth communication is performed. The rangefinder body is given Bluetooth function by adding the Bluetooth communication circuit 51, so that the rangefinder body can communicate with the host computer such as the mobile phone APP to achieve the effect of real-time transmission and storage of measurement data. The Bluetooth communication chip U5 adopts the MHCB12S type BLE-Mesh module based on the BLE5.2 communication standard for Xiaomi IoT hardware SDK development.

[0065] like Figure 15 and 16 As shown, the communication part 5 also includes an MCU burning circuit 52 and a Bluetooth burning circuit 53, which are electrically connected to the MCU control circuit 11 and the Bluetooth communication circuit 51 respectively. The MCU burning circuit 52 is provided with an MCU burning interface J6, and the MCU burning interface J7 is electrically connected to the single-chip microcomputer U3 through the SWDCK port and the SWDIO port. The running program of the single-chip microcomputer U3 is burned through the MCU burning interface J7, which facilitates the normal use of the MCU control circuit 11. The Bluetooth burning circuit 53 is provided with a Bluetooth burning interface J7, which is electrically connected to the Bluetooth communication chip U5 through the BLE_SWDIO port, the BLE_SWDCK port and the BLE_RST port. The running program of the Bluetooth communication chip U5 is burned through the Bluetooth burning interface J7, which facilitates the use of the Bluetooth communication circuit 51.

[0066] Example 2: This example is based on Example 1. Figure 17 and 18 As shown, the ranging part 2 also includes an auxiliary projection circuit 23. The auxiliary projection circuit 23 is provided with an NPN transistor Q17, a PMOS transistor Q7 and a projection module J4 that are electrically connected to each other. The microcontroller U3 controls the on-off of the NPN transistor Q17 and the PMOS transistor Q7 through the +LR_EN port (pin 33), thereby controlling whether the projection module J4 performs the projection effect. The rangefinder body is provided with the auxiliary projection circuit 23 to facilitate the user to quickly capture the ranging target object during the ranging process, thereby improving the accuracy and convenience of ranging.

[0067] Embodiment 3. Based on embodiment 1 or 2, the communication part 5 of this embodiment is further provided with any one of a WIFI communication circuit, a Zigbee communication circuit, a LoRa communication circuit, and a NB-loT communication circuit. The WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit can all be connected to the host computer via wireless communication. The WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit are respectively provided with a WIFI module, a Zigbee module, a LoRa module, and a NB-loT module. The reliability of the communication part 5 in the rangefinder body and the convenience of user use are improved through the WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel laser rangefinder, comprising a rangefinder body, characterized in that: The rangefinder body is provided with a control part (1) and a distance measuring part (2), an acousto-optic part (3) and a power supply part (4) adapted to the control part (1). The control part (1) includes an MCU control circuit (11) and a switch button circuit (12) electrically connected to the MCU control circuit (11). The MCU control circuit (11) is provided with a single chip microcomputer U3 electrically connected to the MCU control circuit. The switch button circuit (12) is provided with a control switch K1 and a control button S1 electrically connected to the single chip microcomputer U3. The rangefinder body is also provided with a communication part (5) adapted to the control part (1). The communication part (5) includes a Bluetooth communication circuit (51) electrically connected to the MCU control circuit (11). The Bluetooth communication circuit (51) includes a Bluetooth communication chip U5 and a Bluetooth antenna ANT1 and a PMOS tube Q8 electrically connected to the Bluetooth communication chip U5.

2. A novel laser rangefinder according to claim 1, characterized in that: The distance measuring part (2) includes a distance measuring control circuit (21) and a three-axis phase sensing circuit (22) adapted to the distance measuring control circuit (21), wherein the distance measuring control circuit (21) includes an NPN transistor Q19, a PMOS transistor Q18 and a laser distance measuring module J2 electrically connected to each other, and the three-axis phase sensing circuit (22) is provided with a three-axis phase sensor U4 electrically connected to the single-chip microcomputer U3, and the three-axis phase sensor U4 is electrically connected to the single-chip microcomputer U3 via an SDA port and an SCL port.

3. A novel laser rangefinder according to claim 1, characterized in that: The sound and light part (3) is provided with an information display circuit (31) and a sound prompt circuit (32) adapted to the information display circuit (31); the information display circuit (31) includes a PMOS transistor Q13 and an LCD display screen J1 electrically connected to the PMOS transistor; the sound prompt circuit (32) is provided with an NPN transistor Q15 and a buzzer LS1 electrically connected to the NPN transistor Q15.

4. A novel laser rangefinder according to claim 1, characterized in that: The power supply part (4) is provided with a battery circuit (41), a charging control circuit (42) and an LDO power supply circuit (43) electrically connected to the battery circuit (41), and the battery circuit (41) is provided with a battery interface BAT and a lithium battery detachably connected to the battery interface BAT.

5. A novel laser rangefinder according to claim 4, characterized in that: The charging control circuit (42) is provided with a USB charging subcircuit (421) and a charging control subcircuit (422) electrically connected to each other. The USB charging subcircuit (421) is provided with a charging interface USB1 and a power management chip U8 electrically connected to each other. The USB charging subcircuit (421) generates a charging power supply voltage VCC through the charging structure USB1 and the power management chip U8. The charging control subcircuit (422) is provided with an NMOS tube Q14, a PMOS tube Q1, resistors R6, R13 and a power management chip U2 electrically connected to each other. The charging control subcircuit (422) generates a battery voltage VBAT through the power management chip U2. The charging control subcircuit (422) is also provided with resistors R9, R11 and an NMOS tube Q2 electrically connected to the power management chip U2.

6. A novel laser rangefinder according to claim 5, characterized in that: The LDO power supply circuit (43) is provided with a voltage stabilizing subcircuit (431) and a charging power supply subcircuit (432) and a battery power supply subcircuit (433) electrically connected to the voltage stabilizing subcircuit (431). The voltage stabilizing subcircuit (431) is provided with an LDO voltage stabilizing chip U1. The voltage stabilizing subcircuit (431) outputs a regulated power supply voltage VCCMCU after voltage stabilization by the LDO voltage stabilizing chip U1. The input end of the charging power supply subcircuit (432) is electrically connected to the charging power supply voltage VCC, and the output end is electrically connected to the input end of the LDO voltage stabilizing chip U1. The battery power supply subcircuit (433) is provided with a PMOS tube Q3.

7. A novel laser rangefinder according to claim 6, characterized in that: The power supply part (4) further includes a battery detection circuit (44) and a charging detection circuit (45) electrically connected to the MCU control circuit (11); the battery detection circuit (44) is provided with an NMOS tube Q9, resistors R33 and R38 electrically connected to each other; and the charging detection circuit (45) is provided with an NMOS tube Q10.

8. The novel laser rangefinder according to claim 1, characterized in that: The communication part (5) further includes an MCU burning circuit (52) and a Bluetooth burning circuit (53) which are electrically connected to the MCU control circuit (11) and the Bluetooth communication circuit (51), respectively. The MCU burning circuit (52) is provided with an MCU burning interface J6, and the Bluetooth burning circuit (53) is provided with a Bluetooth burning interface J7.

9. A novel laser rangefinder according to any one of claims 1 to 8, characterized in that: The distance measuring part (2) also includes an auxiliary projection circuit (23), and the auxiliary projection circuit (23) is provided with an NPN transistor Q17, a PMOS transistor Q7 and a projection module J4 that are electrically connected to each other.

10. The novel laser rangefinder according to claim 9, characterized in that: The communication part (5) is further provided with any one of a WIFI communication circuit, a Zigbee communication circuit, a LoRa communication circuit, and a NB-loT communication circuit. The WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit can all be connected to the host computer via wireless communication. The WIFI communication circuit, the Zigbee communication circuit, the LoRa communication circuit, and the NB-loT communication circuit are respectively provided with a WIFI module, a Zigbee module, a LoRa module, and a NB-loT module.

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