Photoelectric rotating speed sensor with broken line detection circuit

Abstract

The utility model provides a photoelectric rotating speed sensor with a broken line detection circuit, which relates to the technical field of rail vehicle-mounted speed measurement and comprises a shell assembly, the shell assembly is composed of a shell and a coupler, the shell is arranged at the top of a mounting surface, and the coupler penetrating through the shell is arranged at the bottom of the mounting surface. The pressure transmitter test interface has the remarkable beneficial effects that in the aspect of fault advanced detection, the sensor wire breakage condition can be detected before a vehicle is started, potential safety hazards and operation problems caused by sensor faults in the vehicle operation process are killed in the bud state, the driving safety is ensured, and the maintenance efficiency is improved. Through clear high and low level indication, maintenance personnel can quickly position a fault channel, the maintenance time is greatly shortened, the operation efficiency of a railway vehicle is powerfully improved, and from the aspect of system reliability, the test interface can effectively guarantee normal transmission of sensor data, so that a railway vehicle operation control system is more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle speed measurement technology, and in particular to a photoelectric speed sensor with a wire breakage detection circuit. Background Technology

[0002] In railway vehicle operation, photoelectric speed sensors play a crucial role, as they are used to measure key parameters such as wheel speed, providing data support for vehicle operation control and safety monitoring.

[0003] However, during routine maintenance and after vehicles enter the parking lot, there are many factors that may cause sensor cables to break, such as accidental contact with maintenance tools or scratches when vehicles enter the parking lot. In addition, after routine maintenance is completed, connectors may also be disconnected due to human factors. Furthermore, existing detection methods cannot detect sensor cable breaks when the vehicle is not running.

[0004] This could lead to the vehicle being unable to accurately obtain information such as rotation speed after starting and running due to sensor disconnection, affecting the normal operation and safety performance of the vehicle.

[0005] Therefore, this utility model proposes a photoelectric speed sensor with a wire breakage detection circuit. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a photoelectric speed sensor with a wire breakage detection circuit.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a photoelectric speed sensor with a wire breakage detection circuit, comprising:

[0008] The housing assembly consists of a housing and a coupling. The housing is disposed on the top of the mounting surface, and the coupling is disposed on the bottom of the mounting surface, penetrating the housing.

[0009] It also includes a protective cover, on the outside of which a detection component is provided. The detection component consists of a grating and a photoelectric module located in a groove on the top of the housing. The photoelectric module is arranged in a ring around the outside of the grating.

[0010] Furthermore, a total of three photoelectric modules are provided, and the three photoelectric modules are arranged in a ring, with the included angle between any two adjacent photoelectric modules being equal.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the three photoelectric modules are evenly distributed in a ring with equal included angles. This layout can accurately collect light with no blind spots in 360°, greatly improve the range and efficiency of light signal reception, effectively reduce signal blind spots, ensure stable operation of the system, and meet the needs of use in complex environments in multiple scenarios.

[0012] Further, the diameter of the photoelectric module is greater than the diameter of the grating, and the diameter of the photoelectric module is less than the diameter of the opening at the top of the shell.

[0013] The beneficial effect of the above further scheme is that the diameter of the photoelectric module is greater than the diameter of the grating, which can fully cover the grating signal and efficiently receive it, and the diameter of the photoelectric module is less than the diameter of the opening at the top of the shell, which facilitates accurate installation in the shell, ensures protection, optimizes light collection, and improves the overall performance and stability of the device.

[0014] Further, the top of the shell is provided with a protective cover outside the grating and the photoelectric module.

[0015] The beneficial effect of the above further scheme is that the protective cover is provided at the top of the shell, which can effectively block dust, water vapor and other impurities, prevent them from eroding the grating and the photoelectric module, prolong the service life of the elements, also buffer accidental impact, reduce the risk of damage, ensure normal operation of the device, and improve the overall reliability.

[0016] Further, the protective cover is provided with an upper cover outside.

[0017] The beneficial effect of the above further scheme is that the protective cover is provided with an upper cover outside, which can further strengthen the protection, block more foreign matter, prevent dust and debris from entering, reduce damage to internal elements, and at the same time, resist sun and rain to some extent, avoid aging of the protective cover, and ensure stable operation of the device, prolong the service life of the device.

[0018] Further, the bottom of the shaft coupling is provided with a transmission square shaft.

[0019] The beneficial effect of the above further scheme is that the transmission square shaft is provided at the bottom of the shaft coupling, which effectively enhances the power transmission, the square shaft structure is stable, adapts to various connection requirements, ensures efficient and stable power transmission, reduces power loss and deviation, improves the operation efficiency of the device, makes the associated machinery run more smoothly, and reduces the failure rate of the device.

[0020] Further, one side of the shell is provided with a tail cable, and the other end of the tail cable is provided with a tail cable connector.

[0021] The beneficial effect of the above further scheme is that the tail cable and the tail cable connector are provided on one side of the shell, which greatly facilitates the connection of the device, the tail cable is flexible, and adapts to complex installation environment; the tail cable connector is connected stably, ensuring stable and reliable signal and power transmission, easily realizing quick docking between devices, reducing wiring difficulty, and improving system integration efficiency.

[0022] Compared with the prior art, the advantages and positive effects of the utility model are that:

[0023] The pressure transmitter test interface has remarkable beneficial effects, in the aspect of early fault detection, can detect the sensor disconnection before the vehicle starts, and kills the security risks and operation problems caused by sensor faults in the vehicle operation in the bud state, ensures the driving safety, improves the maintenance efficiency, through the clear high and low level indication, the maintenance personnel can quickly locate the fault channel, greatly shortens the maintenance time, and effectively improves the operation efficiency of the railway vehicle, from the system reliability, the test interface can effectively guarantee the normal transmission of sensor data, makes the railway vehicle operation control system more stable and reliable, and provides solid guarantee for the safe and efficient operation of the railway vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view of the photoelectric rotating speed sensor with the disconnection detection circuit of the utility model;

[0025] Figure 2 It is a split view of the photoelectric rotating speed sensor with the disconnection detection circuit of the utility model;

[0026] Figure 3 It is a top view of the photoelectric rotating speed sensor with the disconnection detection circuit of the utility model;

[0027] Figure 4 It is a side view of the photoelectric rotating speed sensor with the disconnection detection circuit of the utility model.

[0028] REFERENCE NUMERALS

[0029] 1, shell assembly;11, shell;111, mounting surface;12, shaft coupling;13, transmission square shaft;

[0030] 2, detection assembly;21, grating;22, photoelectric module;

[0031] 3, protective cover;4, upper cover;

[0032] 5, tail cable;51, tail cable connector. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] As shown in Figures 1-4 The utility model provides a technical scheme: a photoelectric rotating speed sensor with disconnection detection circuit, comprising:

[0035] The shell assembly 1 is composed of a shell 11 and a shaft coupling 12, the shell 11 is arranged at the top of the mounting surface 111, and the shaft coupling 12 is arranged at the bottom of the mounting surface 111 and penetrates the shell 11;

[0036] The detection assembly 2 is composed of a grating 21 arranged at the top of the shell 11 and a photoelectric module 22 arranged outside the grating 21.

[0037] The three photoelectric modules 22 are arranged in a ring shape, and the included angle between the two adjacent photoelectric modules 22 is equal. The three photoelectric modules 22 are uniformly distributed in a ring shape, and the included angle is equal. Such layout can protect the cover to accurately collect light without dead angle, greatly improve the light signal receiving range and efficiency, effectively reduce the signal blind area, ensure the stable operation of the system, and meet the use requirements in complex environments in multiple scenes.

[0038] The diameter of the photoelectric module 22 is greater than the diameter of the grating 21, and the diameter of the photoelectric module 22 is less than the diameter of the opening at the top of the shell 11. The diameter of the photoelectric module 22 is greater than that of the grating 21, which can fully cover the signal of the grating 21 and efficiently receive it. The diameter of the photoelectric module 22 is less than the diameter of the opening at the top of the shell 11, which facilitates accurate installation in the shell 11, ensures protection, optimizes light collection, and improves the overall performance and stability of the equipment.

[0039] A protective cover 3 is arranged outside the grating 21 and the photoelectric module 22 at the top of the shell 11. The protective cover 3 arranged at the top of the shell 11 can effectively block dust, water vapor and other impurities, prevent them from eroding the grating 21 and the photoelectric module 22, prolong the service life of the elements, buffer accidental impact, reduce the risk of damage, ensure the normal operation of the equipment, and improve the overall reliability.

[0040] An upper cover 4 is arranged outside the protective cover 3. The upper cover 4 arranged outside the protective cover 3 can further strengthen protection, block more foreign matter, prevent dust and debris from entering, reduce damage to internal elements, and at the same time, resist sun and rain to some extent, avoid aging of the protective cover 3, and ensure stable operation of the equipment to prolong the service life of the equipment.

[0041] A transmission square shaft 13 is arranged at the bottom of the shaft coupling 12. The transmission square shaft 13 arranged at the bottom of the shaft coupling 12 effectively enhances power transmission, the square shaft structure is stable, adapts to various connection requirements, ensures efficient and stable power transmission, reduces power loss and deviation, improves equipment operation efficiency, makes the associated mechanical operation smoother, and reduces equipment failure rate.

[0042] The shell 11 is provided with a tail cable 5 on one side, and the other end of the tail cable 5 is provided with a tail cable connector 51; the shell 11 is provided with the tail cable 5 and the tail cable connector 51 on one side, which greatly facilitates equipment connection; the tail cable 5 is flexible and can be arranged in complex installation environments; the tail cable connector 51 is stable and reliable in connection, and can ensure stable and reliable signal and power transmission, easily realize rapid docking between devices, reduce wiring difficulty, and improve system integration efficiency.

[0043] In the utility model, the transmission shaft and the rotation shaft of the wheel are reliably connected to ensure that the wheel can drive the transmission shaft to rotate synchronously when the wheel rotates, the grating 21 is installed on the transmission shaft to rotate with the transmission shaft, the photoelectric module 22 is installed at a suitable position to ensure that it can accurately scan the grating 21, when the wheel rotates, the photoelectric module 22 outputs a pulse signal, the signal is filtered and shaped by a signal conditioning circuit and then input into a microcontroller, the microcontroller counts the pulse signal through a built-in counter and calculates the rotation speed and other motion parameters of the wheel according to the counting result and time interval.

[0044] In the utility model, the current detection circuit is connected: linear optocoupler HCNR22011 is selected as a current-voltage conversion element, the light-emitting diode of the primary side of the linear optocoupler is connected with a sampling resistor Rs in series and then connected into the power supply circuit of the sensor channel, when the power supply current passes through the sampling resistor Rs, a voltage drop proportional to the current is generated, the voltage drop makes the light-emitting diode of the primary side of the linear optocoupler emit light, the phototransistor of the secondary side of the linear optocoupler converts the light signal into a current signal, and then the current signal is converted into a voltage signal Vo1 through a load resistor RL, the voltage signal Vo1 represents the power supply current of the sensor channel, and the subsequent comparison circuit is connected for processing.

[0045] In the utility model, the voltage detection circuit is connected: the resistance voltage dividing circuit composed of two high-precision metal film resistors R1 and R2 is still adopted, the two resistors are connected in series between the positive and negative electrodes of the power supply of the sensor channel, and the voltage at the two ends of the resistor R2 is output as a detection voltage Vo2; the voltage signal is directly connected to the subsequent comparison circuit.

[0046] The utility model discloses a current detection circuit and voltage detection circuit, two voltage comparators, the same phase input end of first voltage comparator connects the voltage signal Vo1 of current detection circuit output, opposite phase input end connects the output end of the voltage division circuit that is composed of two precision adjustable resistance, through the resistance of adjusting this two resistance, set the lower limit threshold Vref1 of current, the same phase input end of second voltage comparator connects the voltage signal Vo2 of voltage detection circuit output, opposite phase input end connects the output end of the voltage division circuit that is composed of another two precision adjustable resistance, through the resistance of adjusting this two resistance, set the lower limit threshold Vref2 of voltage, the output end of two voltage comparators is connected to two input ends of a AND gate circuit respectively, when Vo1 is greater than Vref1 and Vo2 is greater than Vref2, and the circuit output high level, indicates that sensor line is normal, otherwise, output low level, indicate that there is the breakage fault of line.

[0047] The utility model discloses a current detection circuit and voltage detection circuit, two voltage comparators, the same phase input end of first voltage comparator connects the voltage signal Vo1 of current detection circuit output, opposite phase input end connects the output end of the voltage division circuit that is composed of two precision adjustable resistance, through the resistance of adjusting this two resistance, set the lower limit threshold Vref1 of current, the same phase input end of second voltage comparator connects the voltage signal Vo2 of voltage detection circuit output, opposite phase input end connects the output end of the voltage division circuit that is composed of another two precision adjustable resistance, through the resistance of adjusting this two resistance, set the lower limit threshold Vref2 of voltage, the output end of two voltage comparators is connected to two input ends of a AND gate circuit respectively, when Vo1 is greater than Vref1 and Vo2 is greater than Vref2, and the circuit output high level, indicates that sensor line is normal, otherwise, output low level, indicate that there is the breakage fault of line.

[0048] As Figures 1-4As shown, the current detection process: when the sensor channel has a power supply current passing through, a voltage drop is generated on the sampling resistor Rs, so that the light-emitting diode of the linear photocoupler HCNR201 primary side emits light, and the photosensitive transistor of the secondary side converts the light signal into a current signal, and then converts it into a voltage signal Vo1 through the load resistor RL, the size of this Vo1 signal is proportional to the power supply current, reflecting the current condition of the sensor channel, the voltage detection process: the resistor voltage dividing circuit divides the power supply voltage of the sensor channel according to the voltage dividing ratio of R1 and R2, and obtains the detection voltage Vo2, which represents the size of the power supply voltage of the sensor channel, the comparison and judgment process: the first voltage comparator compares the Vo1 signal output by the current detection circuit with the set current lower limit threshold Vref1, if Vo1 is greater than Vref1, it means that the current is above the lower limit of the normal range, otherwise, the current may be abnormal, similarly, the second voltage comparator compares the Vo2 signal output by the voltage detection circuit with the set voltage lower limit threshold Vref2, if Vo2 is greater than Vref2, it means that the current is above the lower limit of the normal range, otherwise, the voltage may be abnormal, only when Vo1 is greater than Vref1 and Vo2 is greater than Vref2, the AND gate circuit outputs high level, indicating that the sensor line is normal, as long as one of the comparators outputs low level, the AND gate circuit outputs low level, indicating that there is a line breakage fault, the output result process: the output signal of the AND gate circuit controls the switching circuit composed of NPN triode, and then determines the high and low level of the output of the line breakage detection port, the port is connected with the IO input port of the vehicle-mounted system, the vehicle-mounted system reads the level state of the port in real time, when detecting high level, the vehicle-mounted system determines that the sensor line is normal, when detecting low level, the vehicle-mounted system determines that there is a line breakage fault, then, the vehicle-mounted system transmits the result of the sensor self-checking state to the DMI display screen through the internal communication network, on the DMI display screen, the driver is reported the self-checking state of the sensor in the form of intuitive graphics or text, for example, display "sensor normal" or "sensor [corresponding channel] line breakage fault" and other information, so that the driver can understand the working condition of the sensor in time, so as to take corresponding measures.

[0049] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments shall fall within the protection scope of the present application.

Claims

1. An optical tachometer provided with a broken wire detection circuit, characterized by comprising: a light source; a light receiving element; a light path; a light path interruption means; a light path interruption detection means; and a light path interruption detection signal output means. Include: The shell assembly (1) is composed of a shell (11) and a shaft coupling (12), the shell (11) is arranged on the top of the mounting surface (111), the bottom of the mounting surface (111) is provided with the shaft coupling (12) penetrating the shell (11); It also includes a protective cover (3), the outer side of the protective cover (3) is provided with a detection assembly (2), the detection assembly (2) is composed of a grating (21) arranged at the top of the shell (11) groove and a photoelectric module (22), the photoelectric module (22) is annularly distributed on the outer side of the grating (21).

2. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: The photoelectric module (22) is provided with three, and the three photoelectric modules (22) are annularly distributed, and the included angle between the two adjacent photoelectric modules (22) is equal.

3. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: The diameter of the photoelectric module (22) is greater than the diameter of the grating (21), and the diameter of the photoelectric module (22) is less than the diameter of the opening at the top of the shell (11).

4. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: The top of the shell (11) is provided with a protective cover (3) outside the grating (21) and the photoelectric module (22).

5. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: The outer side of the protective cover (3) is provided with an upper cover (4).

6. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: The bottom of the shaft coupling (12) is provided with a driving square shaft (13).

7. The optical tachometer sensor with a broken wire detection circuit according to claim 1, characterized in that: One side of the shell (11) is provided with a tail cable (5), and the other end of the tail cable (5) is provided with a tail cable connector (51).

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