A carrier structure, a scaffold monitoring device and a monitoring system

Abstract

The utility model relates to the field of scaffold deformation monitoring, especially a carrier structure, scaffold monitoring device and monitoring system, including first hoop body, one end of first hoop body has the hinge joint of second hoop body, is provided with the clamping hole between first hoop body and second hoop body, and the non -hinge joint end between first hoop body and second hoop body is provided with locking piece, the non -hinge joint end of first hoop body integrally extends and has the bearing part, is provided with the mounting groove on the bearing part, and the mounting groove is detachably installed with the cover plate at the slot mouth, the deformation of the main force position and the weak position of deformation of scaffold is monitored based on laser offset angle, replaces traditional manual measurement / line monitoring, solves the problem of low artificial efficiency, heavy workload, data lag, insufficient precision, and the convenience of layout is higher.

Description

Technical Field

[0001] This utility model relates to the field of scaffold deformation monitoring, and in particular to a carrier structure, scaffold monitoring device and monitoring system. Background Technology

[0002] In the on-site construction system of power engineering projects, scaffolding is a core temporary safety facility that ensures the safety of workers and supports the construction work. However, due to its structural characteristics, scaffolding needs to be composed of a large number of members spliced ​​together at nodes. This complex structure means that when the scaffolding is subjected to load changes and environmental influences, once local deformation or overall instability occurs, it may quickly trigger a chain reaction, leading to a major construction safety accident and posing a direct and serious threat to the lives of on-site workers.

[0003] Traditional scaffolding safety monitoring methods mainly rely on regular manual inspections, which have many shortcomings such as high workload, discontinuous monitoring, and delayed response. Some methods use contact sensors for monitoring, which have problems such as difficult wiring, easy damage, and high power consumption, making it difficult to meet the needs of long-term real-time monitoring. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is: how to provide a carrier structure, scaffolding monitoring device and monitoring system that are easy to deploy and can monitor scaffolding deformation in real time.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a carrier structure, including a first hoop, a second hoop hinged to one end of the first hoop, a clamping hole provided between the first hoop and the second hoop, and a locking member provided between the non-hinged ends of the first hoop and the second hoop; a bearing portion integrally extends from the non-hinged end of the first hoop, and an installation groove is provided on the bearing portion, and a cover plate is detachably installed at the opening of the installation groove.

[0006] In a preferred embodiment of the carrier structure of this utility model: the first hoop includes a first arc-shaped segment with a hinged end, and a transition segment integrally extends from the other end of the first arc-shaped segment. The transition segment gradually thickens in the direction away from the first arc-shaped segment, and a bearing portion integrally extends from the end of the transition segment away from the first arc-shaped segment. The cross-section of the bearing portion is rectangular, and the thickness of the bearing portion and the end of the transition segment away from the first arc-shaped segment are the same. An installation groove is provided at the end of the bearing portion away from the transition segment.

[0007] In a preferred embodiment of the carrier structure described in this utility model: the second hoop includes a second arc-shaped segment, the first arc-shaped segment and the second arc-shaped segment have the same shape and are arranged opposite to each other, so that a clamping hole is formed between the first arc-shaped segment and the second arc-shaped segment, the second arc-shaped segment has a hinge end that is hinged to the first arc-shaped segment, and the other end of the second arc-shaped segment integrally extends a straight segment, the thickness of the straight segment is the same as the thickness of the second arc-shaped segment.

[0008] In a preferred embodiment of the carrier structure of this utility model: a first through hole is provided on the transition section of the first hoop, and a second through hole is provided on the straight section of the second hoop, with the first through hole and the second through hole being positioned correspondingly; the locking member includes a first bolt passing through the first through hole and the second through hole, and a wing nut is threaded onto the first bolt.

[0009] In a preferred embodiment of the carrier structure described in this utility model: the first through hole is a circular hole, and the second through hole is a strip-shaped hole arranged along the length of the straight section.

[0010] In a preferred embodiment of the carrier structure described in this utility model: the cover plate is detachably installed at the opening of the mounting groove by means of a second bolt, and a sealing part extends integrally outward from the end of the bearing part away from the transition section, and a sealing groove adapted to the sealing part is provided on the cover plate.

[0011] The beneficial effects of this utility model are as follows: the carrier structure adopts a clamping structure that integrates external components into the first clamp and the second clamp, and uses the clamping structure to lock and fix it on the scaffolding poles. This allows the external components to be conveniently placed at the required locations on the scaffolding, and it can adapt to scaffolding poles of different thicknesses.

[0012] In response to the problems existing in scaffolding monitoring, this utility model also proposes a scaffolding monitoring device, including a carrier structure and a deformation monitoring component, wherein the deformation monitoring component is installed on the bearing part of the first hoop.

[0013] In a preferred embodiment of the scaffolding monitoring device of this utility model: the bearing portion of the first hoop has a first surface and a second surface perpendicular to the axis of the clamping hole. Mounting holes are provided on both the first and second surfaces, and the axes of the mounting holes on the first and second surfaces coincide. The deformation monitoring component includes: a laser emitting element comprising a laser tube fixed in one of the mounting holes, with the laser emitted by the laser tube facing away from the other mounting hole; a laser receiving element comprising a silicon photonic sensor fixed in the other mounting hole; and a main board fixed in a mounting groove, connected to the laser tube and the silicon photonic sensor.

[0014] In a preferred embodiment of the scaffolding monitoring device of this utility model: the deformation monitoring component further includes a power supply, which is fixed on the bearing part, and the power supply is connected to the laser emitting element, the laser receiving element and the main board.

[0015] This utility model also proposes a scaffolding monitoring system, including: a control module; a laser emitting module, wherein a laser modulation circuit is connected between the laser emitting module and the control module; a laser receiving module, wherein a programmable threshold comparator is provided between the laser receiving module and the control module; and a power supply module, wherein the power supply module is connected to the control module, the laser emitting module, and the laser receiving module.

[0016] The beneficial effects of this utility model are as follows: it adopts laser offset angle monitoring to monitor the deformation of the main load-bearing parts and weak deformation parts of the scaffold, replacing the traditional manual measurement / wire monitoring, and solving the problems of low efficiency, large workload, data lag and insufficient accuracy of manual monitoring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein: Figure 1 A schematic diagram of the carrier structure is shown; Figure 2 A schematic diagram of the first hoop is shown; Figure 3 A schematic diagram of the second hoop is shown; Figure 4 A schematic diagram of the cover plate structure is shown; Figure 5 A schematic diagram of the scaffolding monitoring device is shown. Figure 6 A structural schematic diagram is shown for monitoring the upper members of the scaffolding. Figure 7 A block diagram of the monitoring system is shown. Figure 8 The circuit schematic of the laser emitting module is shown. Figure 9 The circuit diagram of the programmable threshold comparator connected to the silicon sensor is shown. Figure 10 The circuit diagram at comparator U2 of the programmable threshold comparator is shown; Figure 11 The circuit diagram of the digital-to-analog conversion section of the programmable threshold comparator is shown. Detailed Implementation

[0018] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0020] Reference Figures 1 to 4 This embodiment provides a carrier structure, including a first hoop 1, with a second hoop 2 hinged to one end of the first hoop 1, a clamping hole 3 between the first hoop 1 and the second hoop 2, and a locking member 4 between the non-hinged ends of the first hoop 1 and the second hoop 2; a bearing portion 11 extends integrally from the non-hinged end of the first hoop 1, and an installation groove 12 is provided on the bearing portion 11, with a cover plate 13 detachably installed at the opening of the installation groove 12.

[0021] The aforementioned carrier structure is used to conveniently deploy external devices on the scaffold. Specifically, the first hoop 1 and the second hoop 2 form a clamping structure, which can be fixed to various members of the scaffold. The equipment is fixed to the desired location on the scaffold through this clamping structure. A bearing part 11 is provided on the first hoop 1 for installing external devices, such as alarm devices, data acquisition devices, and lighting devices, so that these external devices and the clamping structure are integrated. The clamping structure fixes the external devices to the members of the scaffold where they need to be deployed, thus enabling convenient deployment of external devices on the scaffold.

[0022] Specifically, refer to Figure 1 and Figure 2 For the first hoop 1, the first hoop 1 includes a first arc-shaped segment 14, the first arc-shaped segment 14 has a hinge end for hinge connection with the second hoop 2, and the other end of the first arc-shaped segment 14 integrally extends a transition segment 15, the transition segment 15 gradually thickens in the direction away from the first arc-shaped segment 14, and the end of the transition segment 15 away from the first arc-shaped segment 14 integrally extends a bearing portion 11, the cross-section of the bearing portion 11 is rectangular, and the thickness of the bearing portion 11 and the end of the transition segment 15 away from the first arc-shaped segment 14 is the same, and the end of the bearing portion 11 away from the transition segment 15 is provided with a mounting groove 12.

[0023] Integrating external components into the clamping structure necessitates that the clamping structure have sufficient installation space. Traditional clamping structures are generally ring-shaped, which makes it difficult to provide effective installation space. Using an overall thickened clamp to provide installation space results in a larger overall size and weight of the equipment, reducing its stability and potentially impacting the workers' workspace. This application optimizes the structure of the first clamping body 1. The first clamping body 1 specifically includes three parts: a first arc-shaped segment 14, a transition segment 15, and a load-bearing part 11. The first arc-shaped segment 14 cooperates with the second clamping body 2 to form clamping holes 3 for holding scaffolding members, thus achieving its installation and fixing function. Its cross-sectional diameter is relatively... The transition section 15 is relatively small, and it integrally connects the first arc-shaped section 14 and the bearing part 11. Through the gradual thickening of the transition section 15, a smooth transition is achieved from the first arc-shaped section 14 to the bearing part 11, ultimately making the overall thickness of the bearing part 11 larger. An installation groove 12 is provided on the bearing part 11 to meet the installation space requirements of external devices. Through this design, the overall volume and weight of the clamp structure are not significantly increased while meeting the installation space requirements of external devices, making it more convenient and stable to use. The first arc-shaped section 14, the transition section 15 and the bearing part 11 are integrated and smoothly transitioned, making manufacturing easier and mechanical strength higher.

[0024] Reference Figures 1 to 3 For the second hoop 2, the second hoop 2 includes a second arc-shaped segment 21. The first arc-shaped segment 14 and the second arc-shaped segment 21 have the same shape and are arranged opposite to each other, so that a clamping hole 3 is formed between the first arc-shaped segment 14 and the second arc-shaped segment 21. The second arc-shaped segment 21 has a hinge end that is hinged to the first arc-shaped segment 14. The other end of the second arc-shaped segment 21 integrally extends a straight segment 22. The thickness of the straight segment 22 is the same as the thickness of the second arc-shaped segment 21.

[0025] The second hoop 2 is designed to fit the first hoop 1. It does not bear the installation of external components, so its cross-sectional diameter and the first arc segment 14 can be designed to be the same, both being thinner than the bearing part 11.

[0026] Furthermore, refer to Figures 1 to 3 The first hoop 1 has a first through hole 16 on the transition section 15. The first through hole 16 is a round hole. The second hoop 2 has a second through hole 23 on the straight section 22. The second through hole 23 is a strip-shaped hole along the length of the straight section 22. The first through hole 16 and the second through hole 23 are in corresponding positions. The locking member 4 includes a first bolt 41 that passes between the first through hole 16 and the second through hole 23. A wing nut 42 is threaded onto the first bolt 41.

[0027] The transition section 15 serves to smoothly transition between the first arc-shaped section 14 and the load-bearing section. At the same time, it cooperates with the straight section 22 of the second hoop 2 to lock and fix the hoop structure after it is fully fitted onto the scaffold member by the locking member 4. The locking member 4 specifically includes a first bolt 41, which passes through the first through hole 16 and the second through hole 23 in sequence and is then tightened by a wing nut 42. The first through hole 16 is a circular hole adapted to the first bolt 41 to limit the lateral movement of the first bolt 41. The second through hole 23 is a strip-shaped hole to accommodate the locking and fixing of scaffold members of different thicknesses.

[0028] Furthermore, refer to Figure 4 The cover plate 13 is detachably installed at the opening of the mounting groove 12 by means of the second bolt 17. The end of the bearing part 11 away from the transition section 15 extends outward integrally with a sealing part 111. The cover plate 13 is provided with a sealing groove 131 that matches the sealing part 111.

[0029] The sealing part 111 is specifically an annular sealing protrusion that protrudes outward around the opening of the mounting groove 12. The sealing part 111 is embedded in the sealing groove 131 of the cover plate 13, which improves the overall sealing performance after installation and helps to improve the protection of the devices installed in the mounting groove 12.

[0030] Example 2, refer to Figure 5 and Figure 6 A scaffolding monitoring device is used to monitor the deformation of the main load-bearing parts and the weak deformation parts of the scaffolding. It includes a carrier structure and a deformation monitoring component 5, which is installed on the load-bearing part 11 of the first hoop 1.

[0031] The deformation monitoring component 5 is specifically arranged as follows: the bearing part 11 of the first hoop 1 has a first surface 18 and a second surface 19 perpendicular to the axis of the clamping hole 3. Both the first surface 18 and the second surface 19 are provided with mounting holes 110, and the axes of the mounting holes 110 on the first surface 18 and the mounting holes 110 on the second surface 19 coincide. The deformation monitoring component 5 includes a laser emitting element 51, which includes a laser tube 511. The laser tube 511 is fixed in one of the mounting holes 110, and the laser emitted by the laser tube 511 faces away from the other mounting hole 110. The laser receiving element 52 includes a silicon photonic sensor 521, which is fixed in the other mounting hole 110. The main board 53 is fixed in the mounting groove 12 and is connected to the laser tube 511 and the silicon photonic sensor 521.

[0032] In addition, the deformation monitoring component 5 also includes a power supply 54, which is fixed on the support 11. The power supply 54 is connected to the laser emitting element 51, the laser receiving element 52 and the main board 53 to supply power to the device.

[0033] The monitoring principle is as follows: Two monitoring devices are used, which are fixed on both sides of the monitoring point of the scaffold member by a clamp structure. The monitoring point is generally the main load-bearing part and the weak deformation part of the scaffold. In the two monitoring devices, the laser tube 511 of one monitoring device is directly facing the silicon photonic sensor 521 of the other monitoring device, so that the laser emitted by the laser tube 511 irradiates the silicon photonic sensor 521. When deformation occurs at the monitoring point, the relative position of the two monitoring devices changes, causing the position of the laser tube 511 irradiating the silicon photonic sensor 521 to shift. The deformation of the monitoring point is determined by this shift.

[0034] The monitoring device is equipped with a laser tube 511 that emits laser light and a silicon photoelectric sensor 521 that receives laser light. When the laser tube 511 is working, the monitoring device is the transmitter and its silicon photoelectric sensor 521 is not working. The other corresponding monitoring device is the receiver, and its silicon photoelectric sensor 521 is working while the laser tube 511 is not working. That is, a single device can switch between "transmit / receive" modes without distinguishing between the master and slave units. The same structural scheme can be used, which improves installation efficiency and utilization.

[0035] Example 3, referring to Figures 7 to 11 A scaffolding monitoring system includes: a control module; a laser emitting module, wherein a laser modulation circuit is connected between the laser emitting module and the control module; a laser receiving module, wherein a programmable threshold comparator is provided between the laser receiving module and the control module; and a power supply module, wherein the power supply module is connected to the control module, the laser emitting module, and the laser receiving module.

[0036] The control module includes an MCU chip, model CH572; the laser emitting module includes a laser tube, and a laser modulation circuit is connected between the laser tube and the MCU chip; the laser receiving module includes a silicon photoelectric sensor, and a programmable threshold comparator is connected between the silicon photoelectric sensor and the MCU chip; the power supply module includes an amorphous silicon solar panel, a battery, and an energy harvesting module, which collects energy from the amorphous silicon solar panel or battery to power the system.

[0037] For laser emitting modules, such as Figure 8In the laser modulation circuit, a PMOS transistor Q1 (AO3401A) is used as the switching device for the laser tube H2 to realize on-off control of laser emission. The source of the PMOS is connected to VCC, the drain is connected to the positive electrode of the laser tube, and the negative electrode of the laser tube is grounded. The control signal LASER_EMISSION is output by the main control MCU, and is connected to the gate of the PMOS through the current limiting resistor R12 (10Ω). R13 (1MΩ) is a gate pull-up resistor, which connects the gate and VCC. The turn-on condition of the PMOS is that the gate voltage is lower than the source voltage by a certain threshold (i.e., VGS < Vth, negative voltage). When the MCU outputs a low level (0V), the gate of the PMOS is at 0V while the source is at VCC, so VGS = -VCC, which meets the turn-on condition, Q1 is turned on, and the laser tube is powered to emit light. When the MCU outputs a high level (VCC), the gate is pulled to VCC, VGS ≈ 0V, the PMOS is turned off, and the laser is extinguished. The diode D1 (1N4148W) is connected across R12, with the anode connected to the MCU output terminal (LASER_EMISSION) and the cathode connected to the gate of the PMOS. When the MCU switches from "low level" to "high level", the gate voltage rises slowly due to the presence of R12, resulting in a delay in turning off the PMOS. At this time, D1 is forward-conducted, so that the high level output by the MCU directly and quickly charges the gate capacitance of the PMOS, thereby accelerating the rising speed of the gate voltage and speeding up the PMOS turn-off process. The function of D1 is to accelerate gate charging (from 0V to VCC) to make the PMOS exit the conduction state faster. It does not discharge charges, but provides a charging path to compensate the current limiting effect of R12 and improve the switching speed. R13 ensures that when the MCU does not output or at the moment of system power-on, the gate of the PMOS is at a high level and in the off state, preventing accidental turn-on.

[0038] For the laser receiving module, such as Figures 9 to 11As shown, the programmable threshold comparator is used to implement the detection and threshold comparison functions of the optical signal. The silicon crystal sensor is connected through interface H1. Pin 1 of H1 is connected to one end of capacitor C17 (100nF). The other end of C17 is connected to one end of resistor R24 ​​(1MΩ), one end of resistor R25 (1MΩ), and the subsequent LIGHT_SENSOR_IN signal node. Pin 2 of H1 is connected to ground (GND). The other end of R24 is connected to SENSOR_VCC, and the other end of R25 is connected to GND. Capacitor C17 acts as DC blocking, and resistors R24 and R25 form a voltage divider circuit. After preliminary processing of the signal input from the silicon sensor, the LIGHT_SENSOR_IN signal is obtained. Pin 3 (VIN+) of comparator U2 (model RS8551XF) is connected to the LIGHT_SENSOR_IN signal, pin 4 (VIN−) is connected to the LIGHT_SENSOR_THRESHOLD_DAC signal, pin 5 (V+) is connected to SENSOR_VCC, and a capacitor C5 (100nF) is connected between SENSOR_VCC and GND for filtering. Pin 1 (VOUT) outputs the LIGHT_SENSOR_IRQ signal. Comparator U2 compares the LIGHT_SENSOR signal with the LIGHT_SENSOR_THRESHOLD_DAC signal. When the LIGHT_SENSOR_IN signal voltage is higher than the LIGHT_SENSOR_THRESHOLD_DAC signal voltage, U2 outputs the corresponding LIGHT_SENSOR_IRQ signal. Pin 3 (VDD) of the digital-to-analog converter (DAC) chip U3 (model MCP4725A0T−E / CH) is connected to SENSOR_VCC, and capacitor C6 (with a capacitance of [value missing]) is connected between SENSOR_VCC and GND. Pin 1 (100nF) is used for filtering. Pin 2 (VSS) is connected to GND. Pin 1 (VOUT) outputs the LIGHT_SENSOR_THRESHOLD_DAC signal. Pins 4 (SDA) and 5 (SCL) are connected to the external SDA and SCL signals respectively to receive control signals via the I2C bus. Pin 6 (A0) is connected to GND. The external system sends control commands to U3 via the I2C bus (SDA and SCL signals). U3 generates the corresponding LIGHT_SENSOR_THRESHOLD_DAC threshold voltage signal according to the command, providing a comparison reference for comparator U2.

[0039] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A carrier structure, characterized in that: It includes a first hoop (1), one end of which is hinged to a second hoop (2), a clamping hole (3) is provided between the first hoop (1) and the second hoop (2), and a locking member (4) is provided between the non-hinged ends of the first hoop (1) and the second hoop (2). The non-hinged end of the first hoop (1) is integrally extended with a bearing part (11), and the bearing part (11) is provided with a mounting groove (12), and a cover plate (13) is detachably installed at the groove opening of the mounting groove (12).

2. The carrier structure according to claim 1, characterized in that: The first hoop (1) includes a first arc-shaped segment (14), the first arc-shaped segment (14) has a hinge end, and a transition segment (15) extends integrally from the other end of the first arc-shaped segment (14). The transition segment (15) gradually thickens in the direction away from the first arc-shaped segment (14). A bearing portion (11) extends integrally from the end of the transition segment (15) away from the first arc-shaped segment (14). The cross-section of the bearing portion (11) is rectangular, and the thickness of the bearing portion (11) and the end of the transition segment (15) away from the first arc-shaped segment (14) is the same. An installation groove (12) is provided at the end of the bearing portion (11) away from the transition segment (15).

3. The carrier structure according to claim 2, characterized in that: The second hoop (2) includes a second arc segment (21). The first arc segment (14) and the second arc segment (21) have the same shape and are arranged opposite to each other, so that a clamping hole (3) is formed between the first arc segment (14) and the second arc segment (21). The second arc segment (21) has a hinge end that is hinged to the first arc segment (14). The other end of the second arc segment (21) has an integrally extended straight segment (22). The thickness of the straight segment (22) is the same as the thickness of the second arc segment (21).

4. The carrier structure according to claim 3, characterized in that: The first hoop (1) has a first through hole (16) on the transition section (15) and the second hoop (2) has a second through hole (23) on the straight section (22). The first through hole (16) and the second through hole (23) are in corresponding positions. The locking member (4) includes a first bolt (41) passing between the first through hole (16) and the second through hole (23), and a wing nut (42) is threaded onto the first bolt (41).

5. The carrier structure according to claim 4, characterized in that: The first through hole (16) is a round hole, and the second through hole (23) is a strip hole arranged along the length direction of the straight section (22).

6. The carrier structure according to claim 5, characterized in that: The cover plate (13) is detachably installed at the opening of the mounting groove (12) by the second bolt (17). The bearing part (11) extends outward integrally from the end away from the transition section (15) with a sealing part (111). The cover plate (13) is provided with a sealing groove (131) that is adapted to the sealing part (111).

7. A scaffolding monitoring device, characterized in that: The carrier structure includes any one of claims 1 to 6, and further includes a deformation monitoring component (5), which is installed on the bearing part (11) of the first hoop (1).

8. The scaffolding monitoring device according to claim 7, characterized in that: The first hoop (1) has a first surface (18) and a second surface (19) perpendicular to the axis of the clamping hole (3) on its bearing part (11). Mounting holes (110) are provided on both the first surface (18) and the second surface (19), and the axes of the mounting holes (110) on the first surface (18) and the second surface (19) coincide. The deformation monitoring component (5) includes... A laser emitting element (51) includes a laser tube (511), which is fixed in one of the mounting holes (110), and the laser emitted by the laser tube (511) faces away from the other mounting hole (110). A laser receiving element (52) includes a silicon photoelectric sensor (521) which is fixed in another mounting hole (110); The motherboard (53) is fixed in the mounting slot (12) and is connected to the laser tube (511) and the silicon photonic sensor (521).

9. The scaffolding monitoring device according to claim 8, characterized in that: The deformation monitoring component (5) also includes a power supply (54), which is fixed on the support (11) and connected to the laser emitting element (51), the laser receiving element (52) and the motherboard (53).

10. A scaffolding monitoring system, characterized in that: include, Control module; A laser emitting module, wherein a laser modulation circuit is connected between the laser emitting module and the control module; A laser receiving module, wherein a programmable threshold comparator is provided between the laser receiving module and the control module; A power supply module is connected to a control module, a laser emitting module, and a laser receiving module.

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