Elevator brake wheel rotation angle detection device and elevator brake braking capacity detection method

Abstract

The invention provides an elevator brake wheel rotation angle detection device and an elevator brake braking capacity detection method. The elevator brake wheel rotation angle detection device comprises a laser receiving and transmitting module, a reflection module arranged on an elevator brake wheel, a pulse data receiving and transmitting module and a braking signal generation module. The laser transceiver module emits laser and receives the laser reflected by the reflection module when carrying out a brake test on the elevator brake, generates a pulse digital signal and sends the pulse digital signal to the pulse data transceiver module; the pulse data receiving and transmitting module is used for carrying out coding emission and decoding receiving on the pulse digital signal from the laser receiving and transmitting module so as to wirelessly transmit the pulse digital signal to the brake signal generation module; and the brake signal generation module calculates the elevator brake wheel rotation number according to the pulse digital signal. According to the invention, accurate quantification of the rotation number of the brake wheel after the elevator brake is switched on is realized, the technical problem that the braking capacity of a machine-room-free and non-steel-wire-rope type elevator cannot be detected is solved, and the detection capacity for guaranteeing the operation safety of the elevator is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator safety detection, and in particular to an elevator brake wheel rotation angle detection device and an elevator brake ability detection method. Background Art

[0002] Braking capacity is the ultimate indicator of the technical condition of an elevator's brakes. Braking capacity inspection is essential for preventing accidents involving elevator slippage and injuries. The current TSG T7001-2023 inspection program only covers the inspection of brake geometry and condition, lacking any testing of elevator braking capacity.

[0003] The rotation angle of the brake wheel during an elevator's braking process is a key parameter reflecting brake performance. The smaller the rotation angle, the better the braking performance. Currently, most elevator suspension components are divided into two types: wire rope suspension and non-wire rope suspension. Wire rope suspension generally uses a wheel-type traction sheave with a pitch diameter greater than 320mm and a rated speed of 200 rpm. Non-wire rope suspension (such as covered belt elevators) typically uses a column-type traction sheave with a diameter of 120mm and a rated speed of up to 700 rpm. Therefore, it is impossible to visually determine the number of revolutions / angles the traction sheave continues to rotate after an emergency stop.

[0004] Currently, elevator braking force testing methods face a dilemma: testing actions are in place, but results are lacking. Judging elevator braking capacity remains subjective and based on intuition. The reasons for and against a failure vary widely, with no quantitative indicators, making it a controversial testing item. Summary of the Invention

[0005] To this end, the present invention provides an elevator brake wheel rotation angle detection device and an elevator brake braking capacity detection method, aiming to solve the technical problem in the prior art that it is difficult to accurately detect the braking capacity of the elevator brake.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] According to a first aspect of the present invention, the present invention provides an elevator brake wheel rotation angle detection device, the device comprising a laser transceiver module, a reflection module provided on the elevator brake wheel, a pulse data transceiver module, and a brake signal generating module; the laser transceiver module, the pulse data transceiver module, and the brake signal generating module are connected in sequence;

[0008] The reflection module is used to reflect the received light source;

[0009] The laser transceiver module is used to transmit original laser light to the reflective module and receive target laser light reflected by the reflective module when performing a brake test on the elevator brake, and generate a pulse digital signal according to the target laser light, and send the pulse digital signal to the pulse data transceiver module;

[0010] The pulse data transceiver module includes a pulse data encoding and transmitting circuit and a radio frequency data decoding and receiving circuit, which are respectively used to encode and transmit and decode and receive the pulse digital signal from the laser transceiver module, so as to realize wireless transmission of the pulse digital signal to the brake signal generating module;

[0011] The braking signal generating module is used to calculate the final number of revolutions / final rotation angle of the elevator braking wheel when performing a braking test based on the pulse digital signal.

[0012] Furthermore, the laser transceiver module includes a laser transceiver circuit, a laser emission cavity, and a laser return cavity;

[0013] The laser transceiver circuit includes a laser diode LD, a phototransistor Q307, a photodiode PD and a voltage comparator U3; the emitter of the phototransistor is connected to the voltage comparator U3;

[0014] The laser diode LD is disposed in the laser emission cavity and is used to emit original laser light toward the reflection module;

[0015] The photodiode PD is in the same package as the laser diode LD and is used to monitor the original laser from the laser diode LD and drive the laser diode LD using an automatic power control function;

[0016] The phototransistor Q307 is arranged in the laser return cavity and is used to receive the target laser reflected by the reflection module, and the emitter potential increases;

[0017] The voltage comparator U3 is configured to output a discrete pulse digital signal in response to an increase in the emitter potential of the phototransistor Q307 .

[0018] Furthermore, the laser transceiver circuit also includes a power supply BAT2, a capacitor C310, an electrolytic capacitor C301, an electrolytic capacitor C311, a resistor R301, a resistor R302, a resistor R311, a resistor R314, a resistor R324, a resistor R326, a resistor R330, a resistor R333, a potentiometer V301, a potentiometer V302, a diode D302, a diode D303, a transistor Q301, and a transistor Q302;

[0019] The collector of the phototransistor Q307 is connected to the power supply voltage, and is respectively connected to the anode of the laser diode LD, the cathode of the photodiode PD, the first end of the resistor R302, the anode of the electrolytic capacitor C301, the first end of the capacitor C310, the first end of the resistor R314, the first end of the resistor R311, the cathode of the diode D302, the anode of the diode D303, the cathode of the power supply BAT2 and the pulse data encoding transmission circuit, and is grounded; the emitter of the phototransistor Q307 is respectively connected to the second end of the resistor R314, the anode of the electrolytic capacitor C311 and the first end of the resistor R333;

[0020] The cathode of the laser diode LD is connected to the collector of the transistor Q302; the emitter of the transistor Q302 is respectively connected to the cathode of the electrolytic capacitor C301, the second end of the resistor R301, and the second end of the resistor R333 and is grounded, and the base is connected to the collector of the transistor Q301; the emitter of the transistor Q301 is connected to the second end of the resistor R302, and the base is connected to the first end of the potentiometer V301 and the anode of the laser diode LD; the first end of the resistor R301 is connected to the second end of the potentiometer V301;

[0021] The cathode of the electrolytic capacitor C311 is connected to the second end of the resistor R311, the anode of the diode D302, the cathode of the diode D303 and the inverting input terminal of the voltage comparator U3 respectively;

[0022] The input end of the voltage comparator U3 is respectively connected to the first end of the resistor R330, the first end of the resistor R326, and the first end of the potentiometer V302; the second end of the resistor R330 is connected to the power supply voltage; the second end of the potentiometer V302 is grounded;

[0023] The output end of the voltage comparator U3 is connected to the second end of the resistor R326 and the first end of the resistor R324 respectively; the second end of the resistor R324 is connected to the pulse data encoding transmission circuit;

[0024] The power pins of the voltage comparator U3 are respectively connected to the positive electrode of the power supply BAT2 and the pulse data encoding transmission circuit; the ground pin of the voltage comparator U3 is grounded.

[0025] Furthermore, the pulse data coding transmission circuit includes an integrated chip U2, a wireless transmission button K201, transistors Q201-204, a field effect transistor Q205, a resistor R1, a resistor R3, a resistor Rx, resistors R201-208, a power supply BAT, capacitors C201-204, a crystal oscillator X1, and an LED light;

[0026] The OSC pin of the integrated chip U2 is connected to the second end of the resistor Rx, the VCC pin is connected to the second end of the resistor R204 and the first end of the capacitor C204 respectively, the ground pin is connected to the second end of the capacitor C204 and grounded, the TXD pin is connected to the first end of the resistor R206, and the K2 pin is connected to the first end of the wireless transmission button K201, the first end of the resistor R203 and the collector of the transistor Q204 respectively; the second end of the resistor R203 is grounded;

[0027] The positive electrode of the LED lamp is connected to the second end of the resistor R205, and the negative electrode is grounded; the first end of the resistor R205 is respectively connected to the first end of the resistor R204 and the collector of the transistor Q201; the base of the transistor Q201 is respectively connected to the second end of the resistor R202 and the first end of the resistor R201, and the emitter is respectively connected to the second end of the resistor R201 and the positive electrode of the power supply BAT;

[0028] The emitter of the transistor Q204 is connected to the second end of the wireless transmission button K201 and the first end of the resistor R202 respectively, and the base is connected to the first end of the resistor D207; the second end of the resistor R207 is connected to the drain of the field effect transistor Q205;

[0029] The gate of the field effect transistor Q205 is respectively connected to the first end of the resistor R1 and the second end of the resistor R3, and the source is respectively connected to the second end of the resistor R1, the emitter of the transistor Q202 and the laser transceiver circuit, and is grounded; the first electrode of the resistor R3 is connected to the laser transceiver circuit;

[0030] The base of the transistor Q202 is connected to the second end of the resistor R206, and the collector is respectively connected to the second end of the capacitor C203, the signal end of the crystal oscillator X1, and the emitter of the transistor Q203; the first pin of the crystal oscillator X1 is respectively connected to the base of the transistor Q203 and the first end of the resistor R208, and the second pin is respectively connected to the positive electrode of the power supply BAT, the second end of the resistor R208, the first end of the capacitor C202, the second end of the capacitor C201, and the collector of the transistor Q203;

[0031] The second end of the capacitor C202 is connected to the first end of the capacitor C203; the first end of the resistor C201 is connected to the antenna.

[0032] Furthermore, the radio frequency data decoding and receiving circuit includes integrated chips U100-101, wireless receiving button K101, indicator light LE101, capacitors C100-107, crystal oscillator X100, resistors R100-102, transistor Q101, and induction coils L100-101;

[0033] The ANT pin of the integrated chip U100 is respectively connected to the second end of the capacitor C101 and the first end of the induction coil L101, the VCC pin is connected to the first end of the capacitor C102 and is connected to the power supply voltage, the CTH pin is connected to the first end of the capacitor C103, the DO pin is connected to the RFIN pin of the integrated chip U101, the SHUT pin is connected to the second end of the capacitor C106 and is grounded, the CAGC pin is connected to the first end of the capacitor C106, the RO pin is connected to the first pin of the crystal oscillator X100, and the GND pin is grounded; the second pin of the crystal oscillator X100 is grounded;

[0034] The first end of the induction coil L100 is respectively connected to the first end of the capacitor C101, the first end of the capacitor C100 and the antenna, and the second end is respectively connected to the second end of the capacitor C100, the second end of the induction coil L101, the second end of the capacitor C102, the second end of the capacitor C103 and the braking signal generating module;

[0035] The VCC pin of the integrated chip U101 is respectively connected to the first end of the resistor R102, the first end of the capacitor C104, the first end of the capacitor C105, the first end of the resistor R100 and the brake signal generating module; the GND pin is respectively connected to the second end of the capacitor C104, the second end of the capacitor C105 and grounded; the VT pin is respectively connected to the first end of the wireless receiving button K101 and the first end of the capacitor C107; the D3 pin is connected to the first end of the resistor R101; the second end of the resistor R102 is respectively connected to the collector of the transistor Q101 and the brake signal generating module;

[0036] The base of the transistor Q101 is connected to the second end of the resistor R101, and the emitter is respectively connected to the second end of the capacitor C107, the second end of the wireless receiving button K101, the negative electrode of the indicator light LE101 and grounded; the positive electrode of the indicator light LE101 is connected to the second end of the resistor R100.

[0037] Furthermore, the braking signal generating module includes a braking signal output circuit; the braking signal output circuit includes a single-chip microcomputer MPU4, an inverting drive integrated chip U5-6, and a relay KA1; the single-chip microcomputer MPU4, the inverting drive integrated chip U5, the inverting drive integrated chip U6, and the relay KA1 are connected in sequence;

[0038] The input end of the single-chip microcomputer MPU4 is connected to the radio frequency data decoding and receiving circuit, which is used to receive the pulse digital signal and count the pulse digital signal. When the preset value is reached, the output end of the single-chip microcomputer MPU4 changes from a high level to a low level.

[0039] The inverting drive integrated chip U5 is used to invert the low-level input from the single-chip microcomputer MPU4 to obtain a high-level signal, and send it to the integrated chip U6;

[0040] The inverting drive integrated chip U6 is used to invert the high-level signal from the inverting drive integrated chip U5 and output a low-level signal to the relay KA1;

[0041] The relay KA1 is arranged in series on the elevator safety circuit, and is used to respond to the low-level signal from the inverter drive integrated chip U6 to break the electric shock and cut off the elevator safety circuit.

[0042] Furthermore, the braking signal generating module further includes a single chip reset circuit and a display circuit; the single chip reset circuit and the display circuit are respectively connected to the single chip MPU4;

[0043] The single chip reset circuit is used to reset the single chip MPU4 to a preset initial state when an abnormality occurs during operation, so as to ensure the stable operation of the single chip MPU4;

[0044] The display circuit is used to display the final number of revolutions / final rotation angle of the elevator brake wheel and / or output a prompt tone.

[0045] Furthermore, the reflective module adopts a reflective patch; and / or,

[0046] If the elevator brake wheel is a wheel-type traction wheel, the reflection module is arranged at the end surface of the traction wheel and protrudes from the wheel rim;

[0047] If the elevator brake wheel is a column-type traction wheel, the reflection module is arranged at a blank area beside the traction wheel covering belt.

[0048] Furthermore, the laser transceiver module further includes a convex lens;

[0049] The convex lens is disposed between the laser return cavity and the reflection module, and is used to focus the target laser reflected by the reflection module and irradiate the focus onto the phototransistor Q307 in the laser return cavity.

[0050] According to a second aspect of the present invention, the present invention provides a method for detecting the braking capacity of an elevator brake, which is applied to the elevator brake wheel rotation angle detection device as described in any one of the first aspects of the present invention, comprising:

[0051] When performing a brake test on the elevator brake, the laser transceiver module transmits an original laser to the reflective module, receives a target laser reflected by the reflective module, generates a pulse digital signal according to the target laser, and sends the pulse digital signal to the pulse data encoding transmission circuit;

[0052] The pulse data encoding and transmitting circuit encodes the pulse digital signal from the laser transceiver module to obtain a radio frequency signal, and transmits it through the antenna;

[0053] The radio frequency data decoding and receiving circuit receives the radio frequency signal through the antenna, decodes the radio frequency signal to obtain the pulse digital signal, and sends the pulse digital signal to the braking signal generating module;

[0054] The brake signal generating module calculates the final number of revolutions / final rotation angle of the elevator brake wheel during the brake test according to the pulse digital signal;

[0055] Obtaining model parameters of the elevator brake wheel, and evaluating the braking capacity of the elevator brake according to the final number of revolutions / the final rotation angle; and / or,

[0056] Historical test data of the elevator brake wheel is obtained, and the braking capacity of the elevator brake is compared according to the final number of revolutions / the final rotation angle.

[0057] The present invention adopts the above technical solution and has at least the following beneficial effects:

[0058] The present invention proposes an elevator brake wheel rotation angle detection device and an elevator brake braking capacity detection method, the device including a laser transceiver module, a reflection module provided on the elevator brake wheel, a pulse data transceiver module and a brake signal generating module; the laser transceiver module, the pulse data transceiver module and the brake signal generating module are connected in sequence; the reflection module is used to reflect the received light source; the laser transceiver module is used to transmit the original laser to the reflection module and receive the target laser reflected by the reflection module when performing a brake test on the elevator brake, and generate a pulse digital signal based on the target laser, and send the pulse digital signal to the pulse data transceiver module; the pulse data transceiver module includes a pulse data encoding and transmitting circuit and a radio frequency data decoding and receiving circuit, which are respectively used to encode and transmit and decode and receive the pulse digital signal from the laser transceiver module to realize wireless transmission of the pulse digital signal to the brake signal generating module; the brake signal generating module is used to calculate the final number of revolutions / final rotation angle of the elevator brake wheel during the brake test based on the pulse digital signal. The present invention can achieve accurate quantification of the number of rotations of the brake wheel after the elevator brake is applied, overcome the technical difficulty of being unable to check the braking capacity of machine room-less and non-wire rope elevators, and greatly improve the safety of elevator operation.

[0059] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0061] Figure 1 The figure shows a schematic structural diagram of an elevator brake wheel rotation angle detection device provided by an embodiment of the present invention;

[0062] Figure 2 A circuit schematic diagram of a laser transceiver circuit provided in one embodiment of the present invention is shown;

[0063] Figure 3 FIG2 shows a circuit schematic diagram of a pulse data coding transmission circuit provided by an embodiment of the present invention;

[0064] Figure 4 A circuit schematic diagram of a radio frequency data decoding and receiving circuit provided in one embodiment of the present invention is shown;

[0065] Figure 5 FIG2 shows a circuit schematic diagram of a brake signal output circuit provided by an embodiment of the present invention;

[0066] Figure 6 A flow chart of a method for detecting the braking capacity of an elevator brake provided in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0067] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0068] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0069] The embodiment of the present invention provides an elevator brake wheel rotation angle detection device, such as Figure 1 As shown, it can at least include: a laser transceiver module 10, a reflection module 20 arranged on the elevator brake wheel, a pulse data transceiver module 30 and a brake signal generating module 40; the laser transceiver module 10, the pulse data transceiver module 30, and the brake signal generating module 40 are connected in sequence.

[0070] Among them, the reflection module 20 can be used to reflect the received light source; the laser transceiver module 10 can be used to transmit the original laser to the reflection module 20 and receive the target laser reflected by the reflection module 20 when performing a brake test on the elevator brake, and generate a pulse digital signal according to the target laser, and send the pulse digital signal to the pulse data transceiver module 30; the pulse data transceiver module 30 includes a pulse data encoding and transmitting circuit 310 and a radio frequency data decoding and receiving circuit 320, which are respectively used to encode and transmit and decode and receive the pulse digital signal from the laser transceiver module 10, so as to realize the wireless transmission of the pulse digital signal to the brake signal generating module 40; the brake signal generating module 40 can be used to calculate the final number of revolutions / final rotation angle of the elevator brake wheel during the brake test based on the pulse digital signal.

[0071] The operating principle of the embodiment of the present invention is as follows: During a brake test on an elevator brake, a laser transceiver module 10 illuminates a reflector module 20 mounted on the brake wheel with a laser beam and converts the reflected laser light into a pulsed digital signal. Because the laser transceiver module 10 and the brake signal generator module 40 are located far apart, making wired communication difficult, a pulsed data transceiver module 30 is provided to enable wireless transmission of the pulsed digital signal between the laser transceiver module 10 and the brake signal generator module 40. The brake signal generator module 40 measures the rotational speed of the brake wheel / traction sheave based on the pulsed digital signal. When the rotational speed reaches a preset value, the brake signal generator module 40 sends a brake signal to the elevator brake control cabinet, applying the brake. After the brake wheel stops rotating, the rotational angle of the elevator traction sheave / brake wheel is calculated by subtracting the preset value from the currently displayed rotational speed.

[0072] Further, if Figure 2 As shown, the laser transceiver module 10 may include a laser transceiver circuit, a laser emission cavity, and a laser return cavity; the laser transceiver circuit includes a laser diode LD, a phototransistor Q307, a photodiode PD, and a voltage comparator U3; the emitter of the phototransistor is connected to the voltage comparator U3; the laser diode LD is arranged in the laser emission cavity, and is used to emit original laser light to the reflection module 20; the photodiode PD is in the same package as the laser diode LD, and is used to monitor the original laser light from the laser diode LD and drive the laser diode LD using the automatic power control function; the phototransistor Q307 is arranged in the laser return cavity, and is used to receive the target laser light reflected by the reflection module 20, and the emitter potential increases; the voltage comparator U3 is used to output a discrete pulse digital signal in response to the increase in the emitter potential of the phototransistor Q307.

[0073] In addition, the laser transceiver module 10 may further include a convex lens; the convex lens is arranged between the laser return cavity and the reflection module 20, and is used to focus the target laser reflected by the reflection module 20 and irradiate it on the phototransistor Q307 in the laser return cavity.

[0074] Specifically, the laser transceiver module 10 may also include a power supply BAT2, a capacitor C310, an electrolytic capacitor C301, an electrolytic capacitor C311, a resistor R301, a resistor R302, a resistor R311, a resistor R314, a resistor R324, a resistor R326, a resistor R330, a resistor R333, a potentiometer V301, a potentiometer V302, a diode D302, a diode D303, a transistor Q301, and a transistor Q302. The collector of the phototransistor Q307 is connected to the power supply voltage, and is respectively connected to the positive electrode of the laser diode LD, the negative electrode of the photodiode PD, the first end of the resistor R302, the positive electrode of the electrolytic capacitor C301, the first end of the capacitor C310, the first end of the resistor R314, the first end of the resistor R311, the negative electrode of the diode D302, the positive electrode of the diode D303, the negative electrode of the power supply BAT2 and the pulse data encoding transmission circuit 310, and is grounded; ... The emitter of transistor Q307 is connected to the second end of resistor R314, the positive electrode of electrolytic capacitor C311, and the first end of resistor R333 respectively; the cathode of laser diode LD is connected to the collector of transistor Q302; the emitter of transistor Q302 is connected to the negative electrode of electrolytic capacitor C301, the second end of resistor R301, and the second end of resistor R333 respectively and grounded, and the base is connected to the collector of transistor Q301; the emitter of transistor Q301 is connected to resistor R302 The second end of the resistor R301 is connected to the second end of the potentiometer V301, and the base is connected to the first end of the potentiometer V301 and the positive electrode of the laser diode LD; the first end of the resistor R301 is connected to the second end of the potentiometer V301; the negative electrode of the electrolytic capacitor C311 is respectively connected to the second end of the resistor R311, the positive electrode of the diode D302, the negative electrode of the diode D303 and the reverse input end of the voltage comparator U3; the input end of the voltage comparator U3 is respectively connected to the first end of the resistor R330, the first end of the resistor R326, and the first end of the potentiometer V302; the second end of the resistor R330 is connected to the power supply voltage; the second end of the potentiometer V302 is grounded; the output end of the voltage comparator U3 is respectively connected to the second end of the resistor R326 and the first end of the resistor R324; the second end of the resistor R324 is connected to the pulse data coding transmission circuit 310; the power pins of the voltage comparator U3 are respectively connected to the positive electrode of the power supply BAT2 and the pulse data coding transmission circuit 310; the ground pin of the voltage comparator U3 is grounded.

[0075] Because laser diodes have the characteristics of small spot size and high optical density, the present embodiment utilizes a laser diode (hereinafter referred to as LD) as a point light source, emitting a high-brightness spot with a wavelength of 635 nm, a diameter of approximately 3 mm, and an illumination of 600 lux as the primary laser light. This spot then illuminates a reflective module 20 mounted on the surface of the elevator brake wheel. Part of the laser light is reflected by reflective module 20 and focused by a convex lens before illuminating a phototransistor Q307 within the laser return cavity. As a result, the collector and emitter resistances of phototransistor Q307 decrease, causing its emitter potential to increase. This continuously varying analog signal is coupled to the inverting input of voltage comparator U3 via electrolytic capacitor C311. Pin 5 of voltage comparator U3's input terminal, connected in series with resistor R330 and potentiometer V302, provides a fixed potential, which is compared with the potential at pin 6 of the inverting input terminal, resulting in a discrete pulse digital signal being output at pin 7.

[0076] It is understandable that, in practical applications, the sensitivity of receiving light can be changed by manually adjusting the value of the potentiometer V302. For example, in places with high light intensity such as outdoors, the resistance of the potentiometer V302 can be appropriately reduced.

[0077] Figure 2 The photodiode (PD) in the laser diode is the receiver and feedback device for the target laser. Its function is to receive and monitor the laser light emitted by the laser diode (LD) to achieve APC (Auto Power Control) to drive the laser diode. The photodiode (PD) is built into the same package as the laser diode (LD), enabling it to receive light from the laser diode. The photodiode (PD) is used to provide feedback and monitor the output of the laser diode (LD), ensuring that the output of the laser diode (LD) maintains the desired constant optical power. It can be understood that when the power of the laser diode LD increases, the current flowing through the potentiometer V301 increases, the base potential of the transistor Q301 increases, the base current of the transistor Q302 decreases, and the current flowing through the laser diode LD decreases, thereby reducing the power of the laser diode LD; conversely, when the power of the laser diode LD decreases, the current of the photodiode PD decreases, the current of the potentiometer V301 decreases, and the voltage drop across it is proportional to its current. Therefore, the voltage drop across the potentiometer V301 decreases, the base potential of the transistor Q301 decreases, the current flowing through the resistor R302 increases, the base current of the transistor Q302 increases, the collector potential decreases, the current flowing through the laser diode LD increases, and the output power increases.

[0078] Furthermore, the embodiment of the present invention takes into account that the driving host of the machine room-less elevator is installed in the elevator shaft, while the emergency operation panel is often located outside the shaft at a position that is easily accessible to personnel. The two are not in the same space, so the distance between the laser transceiver module 10 on the driving host and the brake signal generating module 40 at the elevator emergency operation panel is relatively far, and the data is no longer suitable for wired transmission. When using short-range wireless communication to control the transmission of digital signals, if Bluetooth or WiFi modules are used, the cost is high and the AT command configuration is relatively cumbersome. If infrared sensors are used, the communication distance is short and is easily affected by the angle and cannot penetrate walls. Therefore, the embodiment of the present invention adopts a wireless module based on a 315MHz communication frequency, namely a pulse data transceiver module 30, which includes a pulse data encoding transmitting circuit 310 and a radio frequency data decoding receiving circuit 320 for wirelessly transmitting pulse digital signals. It has the advantages of simple operation, strong penetration, and low standby power consumption.

[0079] like Figure 3, which is a circuit schematic diagram of the pulse data coding transmission circuit 310. Specifically, the pulse data coding transmission circuit 310 may include an integrated chip U2, a wireless transmission button K201, transistors Q201-204, a field effect transistor Q205, a resistor R1, a resistor R3, a resistor Rx, resistors R201-208, a power supply BAT, capacitors C201-204, a crystal oscillator X1, and an LED light; the OSC pin of the integrated chip U2 is connected to the second end of the resistor Rx, the VCC pin is connected to the second end of the resistor R204 and the first end of the capacitor C204 respectively, and the ground pin is connected to the second end of the capacitor C204 and grounded. The TXD pin is connected to the first end of the resistor R206, and the K2 pin is respectively connected to the first end of the wireless transmission button K201, the first end of the resistor R203 and the collector of the transistor Q204; the second end of the resistor R203 is grounded; the positive electrode of the LED lamp is connected to the second end of the resistor R205, and the negative electrode is grounded; the first end of the resistor R205 is respectively connected to the first end of the resistor R204 and the collector of the transistor Q201; the base of the transistor Q201 is respectively connected to the second end of the resistor R202 and the first end of the resistor R201, and the emitter is respectively connected to the second end of the resistor R201. The emitter of transistor Q204 is connected to the second end of wireless transmission button K201 and the first end of resistor R202 respectively, and the base is connected to the first end of resistor D207; the second end of resistor R207 is connected to the drain of field effect transistor Q205; the gate of field effect transistor Q205 is connected to the first end of resistor R1 and the second end of resistor R3 respectively, and the source is connected to the second end of resistor R1, the emitter of transistor Q202 and the laser transceiver circuit respectively, and is grounded; the first electrode of resistor R3 is connected to the laser transceiver circuit; the base of transistor Q202 is connected The second end and the collector of resistor R206 are respectively connected to the second end of capacitor C203, the signal end of crystal oscillator X1, and the emitter of transistor Q203; the first pin of crystal oscillator X1 is respectively connected to the base of transistor Q203 and the first end of resistor R208, and the second pin is respectively connected to the positive electrode of power supply BAT, the second end of resistor R208, the first end of capacitor C202, the second end of capacitor C201, and the collector of transistor Q203; the second end of capacitor C202 is connected to the first end of capacitor C203; and the first end of resistor C201 is connected to the antenna.

[0080] It should be noted that to increase the transmission distance of the RF signal, the embodiment of the present invention uses an independent 12V battery for power supply. The pulse data encoding transmission circuit 310 (wireless transmitter) can be constructed using the EV1527 (integrated chip U2) from EV Corporation in the United States, plus a simple peripheral circuit. Pin 7 of the integrated chip U2 is used as a key input, includes an internal grounding resistor, and is connected to an external 10KΩ resistor, which is then connected to the power supply via a key. When a high-level pulse digital signal is collected from the laser transceiver module 10, this pulse digital signal is applied to the gate of the N-channel field-effect transistor Q205. The source and drain of the field-effect transistor Q205 are conductive, and the transistor Q204 is saturated and conductive due to the grounded base. As a result, the base of PNP transistor Q201 reaches a low potential, saturating transistor Q201 and conducting. A high level is then applied to the corresponding pins, such as the power supply terminal of integrated chip U2. This triggers pin 4 of integrated chip U2 to output the corresponding data string, which is then transmitted through a 315 MHz oscillator circuit comprised of transistors Q202 (amplifier), Q203, and crystal oscillator X1, forming a radio frequency signal. In the absence of high-level pulses, the embodiment of the present invention is depowered and integrated chip U2 is in a zero-power state.

[0081] Further, if Figure 4As shown, it is a circuit schematic diagram of the radio frequency data decoding and receiving circuit 320, which may specifically include integrated chips U100-101, a wireless receiving button K101, an indicator light LE101, capacitors C100-107, a crystal oscillator X100, resistors R100-102, a transistor Q101, and induction coils L100-101; the ANT pin of the integrated chip U100 is respectively connected to the second end of the capacitor C101 and the first end of the induction coil L101, the VCC pin is connected to the first end of the capacitor C102 and is connected to the power supply voltage, the CTH pin is connected to the first end of the capacitor C103, the DO pin is connected to the RFIN pin of the integrated chip U101, the SHUT pin is connected to the second end of the capacitor C106 and is grounded, the CAGC pin is connected to the first end of the capacitor C106, the RO pin is connected to the first pin of the crystal oscillator X100, and the GND pin is grounded; the second pin of the crystal oscillator X100 is grounded; the first end of the induction coil L100 is respectively connected to the first end of the capacitor C101, the first end of the capacitor C100 and the antenna, and the second The VCC pins of the integrated chip U101 are respectively connected to the first end of the resistor R102, the first end of the capacitor C104, the first end of the capacitor C105, the first end of the resistor R100 and the brake signal generating module 40, the GND pins are respectively connected to the second end of the capacitor C104, the second end of the capacitor C105 and grounded, and the VT pins are respectively connected to the second end of the capacitor C104, the second end of the capacitor C105 and grounded. Connect the first end of the wireless receiving button K101 and the first end of the capacitor C107, and the D3 pin is connected to the first end of the resistor R101; the second end of the resistor R102 is respectively connected to the collector of the transistor Q101 and the brake signal generating module 40; the base of the transistor Q101 is connected to the second end of the resistor R101, and the emitter is respectively connected to the second end of the capacitor C107, the second end of the wireless receiving button K101, the negative pole of the indicator light LE101 and grounded; the positive pole of the indicator light LE101 is connected to the second end of the resistor R100.

[0082] In this embodiment of the present invention, the RF data decoding and receiving circuit 320 (wireless receiver) is composed of two integrated circuits: WF480RA (integrated chip U100) and RH2762A-K (integrated chip U101), along with a small number of peripheral components. The WF480RA is a highly integrated, ultra-low-power, single-chip RF receiving chip designed by Shenzhen Weifengheng Technology Co., Ltd. All high-frequency signal reception functions are integrated on-chip, and all RF and IF tuning are automatically performed within the chip. The RF signal from the receiving antenna of integrated chip U100 is input via pin 2, and the RF data output from pin 5 is fed into pin 2 of integrated chip U101 (a universal decoding chip RH2762A-K manufactured by Ruihe Electronic Appliance Factory in Taishan City, Guangdong Province). The decoded high-level pulse is output from output terminal pin 6 and inverted by transistor Q101 for output.

[0083] It should be noted that the wireless receiver (RF data decoding and receiving circuit 320) in this embodiment of the present invention has a pairing function to ensure that only the paired wireless transmitter (pulse data encoding and transmitting circuit 310) can control the receiver. In actual operation, press button K101 on the wireless receiver (press for <0.5 seconds) and the blue indicator light LE101 next to button K101 will light up, indicating that the device enters the waiting state for pairing. Within 6 seconds, press button K201 on the wireless transmitter and continue transmitting until the blue indicator light LE101 on the wireless receiver flashes three times, indicating that pairing is successful. The successful pairing data can be stored in the EEPROM memory built into the integrated chip U101.

[0084] Furthermore, the braking signal generating module 40 includes a braking signal output circuit, a single chip microcomputer reset circuit and a display circuit.

[0085] like Figure 5 The figure shows a schematic diagram of the brake signal output circuit. Specifically, the brake signal output circuit includes a single-chip microcontroller (MCU) MPU4, inverting driver integrated chips U5-6, and relay KA1. The MCU MPU4, inverting driver integrated chip U5, inverting driver integrated chip U6, and relay KA1 are connected in sequence. The input of the MCU MPU4 is connected to a radio frequency data decoding and receiving circuit 320, which receives and counts pulse digital signals. When a preset value is reached, the output of the MCU MPU4 changes from a high level to a low level. The inverting driver integrated chip U5 inverts the low-level input from the MCU MPU4 to generate a high-level signal, which is then sent to integrated chip U6. The inverting driver integrated chip U6 inverts the high-level signal from the inverting driver integrated chip U5 and outputs a low-level signal to relay KA1. Relay KA1 is connected in series with the elevator safety circuit and is designed to disconnect the circuit in response to the low-level signal from the inverting driver integrated chip U6, thereby severing the elevator safety circuit.

[0086] Optionally, the brake signal output circuit in this embodiment of the present invention is implemented using a 51-bit single-chip microcomputer (MPU4) with the 89C54RD+ chip as its core. The pulse digital signal from the laser transceiver circuit 10 is sent to port P1.0 of the single-chip microcomputer MPU4 via the pulse data transceiver module 30. MPU4 then counts the pulses generated by each rotation of the elevator traction sheave / brake wheel. When the count reaches a preset value (e.g., 300), port P1.4 of the single-chip microcomputer MPU4 changes from a high level to a low level. The high-level signal, inverted by CD4069 (inverting drive integrated circuit U5), is then sent to pin 7 of the high-current inverter driver integrated circuit ULN2003 (inverting drive integrated circuit U6). Pin 10 then outputs a low level, energizing relay KA1, which is connected in series with the elevator safety circuit. The break contact disconnects the elevator safety circuit, de-energizing the elevator drive unit and applying the brake. The single-chip microcomputer MPU4 then outputs a buzzer and displays the final number of rotations of the traction sheave.

[0087] Optionally, the microcontroller reset circuit and display circuit in the embodiment of the present invention are separately connected to the microcontroller MPU4. The microcontroller reset circuit is used to reset the microcontroller MPU4 to a preset initial state if an abnormality occurs during operation, thereby ensuring stable operation of the microcontroller MPU4. The display circuit is used to display the final number of revolutions / final rotation angle of the elevator brake wheel and output a prompt tone. The display circuit is preferably a three-digit digital tube display circuit. In actual operation, three independent key pulse software codes (+1, +10, +100) can also be preset in the microcontroller MPU4 to ensure pulse counting.

[0088] At present, most types of elevator suspension components are divided into two types: wire rope suspension and non-wire rope suspension. The setting position of the reflective device 20 is different for different types of elevator suspension components. Preferably, the reflective device 20 can use a high-reflectivity reflective patch. For wire rope suspension, a paper double-sided adhesive tape with a bandwidth of about 5mm can be used to stick it on the end face of the traction sheave, and the reflective patch must protrude at least 5mm from the rim. For non-wire rope (such as coated belt) elevators, the traction sheave is generally a column-type traction sheave. Because its two end faces are hidden in the bearing box and difficult to access, the reflective patch is generally made of high-reflectivity silver gold foil paper and stuck on the blank area next to the coating tape. It should be noted that the high-reflectivity reflective patch means that its ability to reflect light is higher than the inherent reflectivity of the working surface of the traction sheave. Furthermore, in actual operation, the laser transceiver module 10 can be mounted on the main drive unit. This makes it independent of whether the elevator being inspected has a machine room or not. Even for elevators without a machine room, the collected pulse signals can be wirelessly transmitted to the brake signal generation unit, completely overcoming the difficulty of inspecting the braking capacity of elevators without a machine room or non-wire rope systems. Specifically, a magnetic bracket can be used to secure and adjust the laser transceiver module 10 so that its emitted laser spot illuminates the reflective patch at a distance of approximately 100 mm.

[0089] Through the present invention, an elevator brake wheel rotation angle detection device is proposed, which performs elevator brake wheel rotation angle detection based on laser reflection counting. By irradiating the reflection mark set on the brake wheel with a laser beam and using a single-chip microcomputer to measure the number of returned pulses, the current number of revolutions / rotation angle of the brake wheel can be displayed, realizing low-cost and non-contact measurement.

[0090] Based on the specific application of the above elevator brake wheel rotation angle detection device, the embodiment of the present invention also provides an elevator brake braking ability detection method, such as Figure 6 As shown, it may at least include the following steps S601 to S605:

[0091] Step S601: When performing a brake test on an elevator brake, the laser transceiver module transmits an original laser to the reflector module, receives a target laser reflected by the reflector module, generates a pulse digital signal based on the target laser, and sends the pulse digital signal to the pulse data encoding transmission circuit;

[0092] Step S602: The pulse data encoding and transmitting circuit encodes the pulse digital signal from the laser transceiver module to obtain a radio frequency signal, and transmits it through the antenna;

[0093] Step S603: The radio frequency data decoding and receiving circuit receives the radio frequency signal through the antenna, decodes the radio frequency signal to obtain a pulse digital signal, and sends the pulse digital signal to the braking signal generating module;

[0094] Step S604: The brake signal generating module calculates the final number of revolutions / final rotation angle of the elevator brake wheel during the brake test according to the pulse digital signal;

[0095] Step S605, obtain the model parameters of the elevator brake wheel, and evaluate the braking capacity of the elevator brake according to the final number of revolutions / final rotation angle; and / or, obtain historical test data of the elevator brake wheel, and compare the braking capacity of the elevator brake according to the final number of revolutions / final rotation angle.

[0096] During regular inspections of elevators, the embodiments of the present invention can be used to evaluate the braking capacity of the elevator brake wheel in combination with the specific model parameters of the elevator. The braking capacity of elevators with the same model and parameters can also be compared. For lever drum brakes that need to be disassembled for maintenance, the braking capacity before and after disassembly can be compared to prevent blind disassembly that reduces the required braking capacity, and also provide a comparison base for next year's tests. In accordance with the current inspection regulations TSG T7001-2023, which stipulate regular inspection items of 125% rated load braking test that is only conducted once every 6 years, it is even more necessary to record the historical number of revolutions of the traction wheel after the brake is powered off, and compare it with the next valuable test to observe changes in the braking capacity of the elevator brake and adjust the elevator operation and maintenance recommendations in a timely manner.

[0097] It should be noted that for other corresponding descriptions of the functional modules involved in the elevator brake braking capacity detection method provided in the embodiment of the present invention, reference can be made to Figure 1 The corresponding description of the device shown will not be repeated here.

[0098] Those skilled in the art will clearly understand that the specific working processes of the systems, devices, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and for the sake of brevity, they will not be further described here.

[0099] In addition, the functional units in various embodiments of the present invention may be physically independent of each other, or two or more functional units may be integrated together, or all functional units may be integrated into a single processing unit. The above-mentioned integrated functional units may be implemented in the form of hardware, software, or firmware.

[0100] Those skilled in the art will understand that if the integrated functional unit is implemented in the form of software and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can essentially or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, which includes a number of instructions for enabling a computing device (such as a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention when running the instructions. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0101] Alternatively, all or part of the steps of implementing the aforementioned method embodiments may be accomplished by hardware associated with program instructions (such as a computing device such as a personal computer, a server, or a network device), and the program instructions may be stored in a computer-readable storage medium. When the program instructions are executed by a processor of a computing device, the computing device executes all or part of the steps of the method described in each embodiment of the present invention.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that within the spirit and principles of the present invention, they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate from the scope of protection of the present invention.

Claims

1. An elevator brake wheel rotation angle detection device, characterized in that: The device includes a laser transceiver module, a reflection module provided on the elevator brake wheel, a pulse data transceiver module and a brake signal generating module; the laser transceiver module, the pulse data transceiver module and the brake signal generating module are connected in sequence; The reflection module is used to reflect the received light source; The laser transceiver module is used to transmit original laser light to the reflective module and receive target laser light reflected by the reflective module when performing a brake test on the elevator brake, and generate a pulse digital signal according to the target laser light, and send the pulse digital signal to the pulse data transceiver module; The pulse data transceiver module includes a pulse data encoding and transmitting circuit and a radio frequency data decoding and receiving circuit, which are respectively used to encode and transmit and decode and receive the pulse digital signal from the laser transceiver module, so as to realize wireless transmission of the pulse digital signal to the brake signal generating module; The braking signal generating module is used to calculate the final number of revolutions / final rotation angle of the elevator braking wheel when performing a braking test based on the pulse digital signal.

2. The device according to claim 1, characterized in that The laser transceiver module includes a laser transceiver circuit, a laser emission cavity, and a laser return cavity; The laser transceiver circuit includes a laser diode LD, a phototransistor Q307, a photodiode PD and a voltage comparator U3; the emitter of the phototransistor is connected to the voltage comparator U3; The laser diode LD is disposed in the laser emission cavity and is used to emit original laser light toward the reflection module; The photodiode PD is in the same package as the laser diode LD and is used to monitor the original laser from the laser diode LD and drive the laser diode LD using an automatic power control function; The phototransistor Q307 is arranged in the laser return cavity and is used to receive the target laser reflected by the reflection module, and the emitter potential increases; The voltage comparator U3 is configured to output a discrete pulse digital signal in response to an increase in the emitter potential of the phototransistor Q307 .

3. The device according to claim 2, characterized in that The laser transceiver circuit also includes a power supply BAT2, a capacitor C310, an electrolytic capacitor C301, an electrolytic capacitor C311, a resistor R301, a resistor R302, a resistor R311, a resistor R314, a resistor R324, a resistor R326, a resistor R330, a resistor R333, a potentiometer V301, a potentiometer V302, a diode D302, a diode D303, a transistor Q301, and a transistor Q302; The collector of the phototransistor Q307 is connected to the power supply voltage, and is respectively connected to the anode of the laser diode LD, the cathode of the photodiode PD, the first end of the resistor R302, the anode of the electrolytic capacitor C301, the first end of the capacitor C310, the first end of the resistor R314, the first end of the resistor R311, the cathode of the diode D302, the anode of the diode D303, the cathode of the power supply BAT2 and the pulse data encoding transmission circuit, and is grounded; the emitter of the phototransistor Q307 is respectively connected to the second end of the resistor R314, the anode of the electrolytic capacitor C311 and the first end of the resistor R333; The cathode of the laser diode LD is connected to the collector of the transistor Q302; the emitter of the transistor Q302 is respectively connected to the cathode of the electrolytic capacitor C301, the second end of the resistor R301, and the second end of the resistor R333 and is grounded, and the base is connected to the collector of the transistor Q301; the emitter of the transistor Q301 is connected to the second end of the resistor R302, and the base is connected to the first end of the potentiometer V301 and the anode of the laser diode LD; the first end of the resistor R301 is connected to the second end of the potentiometer V301; The cathode of the electrolytic capacitor C311 is connected to the second end of the resistor R311, the anode of the diode D302, the cathode of the diode D303 and the inverting input terminal of the voltage comparator U3 respectively; The input end of the voltage comparator U3 is respectively connected to the first end of the resistor R330, the first end of the resistor R326, and the first end of the potentiometer V302; the second end of the resistor R330 is connected to the power supply voltage; the second end of the potentiometer V302 is grounded; The output end of the voltage comparator U3 is connected to the second end of the resistor R326 and the first end of the resistor R324 respectively; the second end of the resistor R324 is connected to the pulse data encoding transmission circuit; The power pins of the voltage comparator U3 are respectively connected to the positive electrode of the power supply BAT2 and the pulse data encoding transmission circuit; the ground pin of the voltage comparator U3 is grounded.

4. The device according to claim 1, characterized in that The pulse data coding transmission circuit includes an integrated chip U2, a wireless transmission button K201, transistors Q201-204, a field effect transistor Q205, a resistor R1, a resistor R3, a resistor Rx, resistors R201-208, a power supply BAT, capacitors C201-204, a crystal oscillator X1, and an LED light; The OSC pin of the integrated chip U2 is connected to the second end of the resistor Rx, the VCC pin is connected to the second end of the resistor R204 and the first end of the capacitor C204 respectively, the ground pin is connected to the second end of the capacitor C204 and grounded, the TXD pin is connected to the first end of the resistor R206, and the K2 pin is connected to the first end of the wireless transmission button K201, the first end of the resistor R203 and the collector of the transistor Q204 respectively; the second end of the resistor R203 is grounded; The positive electrode of the LED lamp is connected to the second end of the resistor R205, and the negative electrode is grounded; the first end of the resistor R205 is respectively connected to the first end of the resistor R204 and the collector of the transistor Q201; the base of the transistor Q201 is respectively connected to the second end of the resistor R202 and the first end of the resistor R201, and the emitter is respectively connected to the second end of the resistor R201 and the positive electrode of the power supply BAT; The emitter of the transistor Q204 is connected to the second end of the wireless transmission button K201 and the first end of the resistor R202 respectively, and the base is connected to the first end of the resistor D207; the second end of the resistor R207 is connected to the drain of the field effect transistor Q205; The gate of the field effect transistor Q205 is respectively connected to the first end of the resistor R1 and the second end of the resistor R3, and the source is respectively connected to the second end of the resistor R1, the emitter of the transistor Q202 and the laser transceiver circuit, and is grounded; the first electrode of the resistor R3 is connected to the laser transceiver circuit; The base of the transistor Q202 is connected to the second end of the resistor R206, and the collector is respectively connected to the second end of the capacitor C203, the signal end of the crystal oscillator X1, and the emitter of the transistor Q203; the first pin of the crystal oscillator X1 is respectively connected to the base of the transistor Q203 and the first end of the resistor R208, and the second pin is respectively connected to the positive electrode of the power supply BAT, the second end of the resistor R208, the first end of the capacitor C202, the second end of the capacitor C201, and the collector of the transistor Q203; The second end of the capacitor C202 is connected to the first end of the capacitor C203; the first end of the resistor C201 is connected to the antenna.

5. The device according to claim 1, characterized in that The radio frequency data decoding and receiving circuit includes integrated chips U100-101, wireless receiving button K101, indicator light LE101, capacitors C100-107, crystal oscillator X100, resistors R100-102, transistor Q101, and induction coils L100-101; The ANT pin of the integrated chip U100 is respectively connected to the second end of the capacitor C101 and the first end of the induction coil L101, the VCC pin is connected to the first end of the capacitor C102 and is connected to the power supply voltage, the CTH pin is connected to the first end of the capacitor C103, the DO pin is connected to the RFIN pin of the integrated chip U101, the SHUT pin is connected to the second end of the capacitor C106 and is grounded, the CAGC pin is connected to the first end of the capacitor C106, the RO pin is connected to the first pin of the crystal oscillator X100, and the GND pin is grounded; the second pin of the crystal oscillator X100 is grounded; The first end of the induction coil L100 is respectively connected to the first end of the capacitor C101, the first end of the capacitor C100 and the antenna, and the second end is respectively connected to the second end of the capacitor C100, the second end of the induction coil L101, the second end of the capacitor C102, the second end of the capacitor C103 and the braking signal generating module; The VCC pin of the integrated chip U101 is respectively connected to the first end of the resistor R102, the first end of the capacitor C104, the first end of the capacitor C105, the first end of the resistor R100 and the brake signal generating module; the GND pin is respectively connected to the second end of the capacitor C104, the second end of the capacitor C105 and grounded; the VT pin is respectively connected to the first end of the wireless receiving button K101 and the first end of the capacitor C107; the D3 pin is connected to the first end of the resistor R101; the second end of the resistor R102 is respectively connected to the collector of the transistor Q101 and the brake signal generating module; The base of the transistor Q101 is connected to the second end of the resistor R101, and the emitter is respectively connected to the second end of the capacitor C107, the second end of the wireless receiving button K101, the negative electrode of the indicator light LE101 and grounded; the positive electrode of the indicator light LE101 is connected to the second end of the resistor R100.

6. The device according to claim 1, characterized in that The braking signal generating module includes a braking signal output circuit; the braking signal output circuit includes a single-chip microcomputer MPU4, an inverting drive integrated chip U5-6, and a relay KA1; the single-chip microcomputer MPU4, the inverting drive integrated chip U5, the inverting drive integrated chip U6, and the relay KA1 are connected in sequence; The input end of the single-chip microcomputer MPU4 is connected to the radio frequency data decoding and receiving circuit, which is used to receive the pulse digital signal and count the pulse digital signal. When the preset value is reached, the output end of the single-chip microcomputer MPU4 changes from a high level to a low level. The inverting drive integrated chip U5 is used to invert the low-level input from the single-chip microcomputer MPU4 to obtain a high-level signal, and send it to the integrated chip U6; The inverting drive integrated chip U6 is used to invert the high-level signal from the inverting drive integrated chip U5 and output a low-level signal to the relay KA1; The relay KA1 is arranged in series on the elevator safety circuit, and is used to respond to the low-level signal from the inverter drive integrated chip U6 to break the electric shock and cut off the elevator safety circuit.

7. The device according to claim 6, characterized in that The braking signal generating module further includes a single chip reset circuit and a display circuit; the single chip reset circuit and the display circuit are respectively connected to the single chip MPU4; The single chip reset circuit is used to reset the single chip MPU4 to a preset initial state when an abnormality occurs during operation, so as to ensure the stable operation of the single chip MPU4; The display circuit is used to display the final number of revolutions / final rotation angle of the elevator brake wheel and / or output a prompt tone.

8. The device according to claim 1, characterized in that The reflective module uses a reflective patch; and / or, If the elevator brake wheel is a wheel-type traction wheel, the reflection module is arranged at the end surface of the traction wheel and protrudes from the wheel rim; If the elevator brake wheel is a column-type traction wheel, the reflection module is arranged at a blank area beside the traction wheel covering belt.

9. The device according to any one of claims 2 to 8, characterized in that: The laser transceiver module further includes a convex lens; The convex lens is disposed between the laser return cavity and the reflection module, and is used to focus the target laser reflected by the reflection module and irradiate the focus onto the phototransistor Q307 in the laser return cavity.

10. A method for detecting the braking capacity of an elevator brake, characterized in that: The elevator brake wheel rotation angle detection device according to any one of claims 1 to 9 comprises: When performing a brake test on the elevator brake, the laser transceiver module transmits an original laser to the reflective module, receives a target laser reflected by the reflective module, generates a pulse digital signal according to the target laser, and sends the pulse digital signal to the pulse data encoding transmission circuit; The pulse data encoding and transmitting circuit encodes the pulse digital signal from the laser transceiver module to obtain a radio frequency signal, and transmits it through the antenna; The radio frequency data decoding and receiving circuit receives the radio frequency signal through the antenna, decodes the radio frequency signal to obtain the pulse digital signal, and sends the pulse digital signal to the braking signal generating module; The brake signal generating module calculates the final number of revolutions / final rotation angle of the elevator brake wheel during the brake test according to the pulse digital signal; Obtaining model parameters of the elevator brake wheel, and evaluating the braking capacity of the elevator brake according to the final number of revolutions / the final rotation angle; and / or, Historical test data of the elevator brake wheel is obtained, and the braking capacity of the elevator brake is compared according to the final number of revolutions / the final rotation angle.

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