WO2020253673A1 - Axle counting apparatus, and axle counting system - Google Patents

Abstract

An axle counting apparatus (2) and an axle counting system. The axle counting apparatus (2) performs shaping, by means of a shaping module (22), on sensing signals of sensing units (111, 112, 121, 122), and generates shaped signals. The shaping module (22) comprises shaping units (221-224) correspondingly connected one-to-one to the sensing units (111, 112, 121, 122), a first output port (225), and a second output port (226). A processing module (23) is connected to the first output port (225), and an isolation output module (25) is connected to the second output port (226) and the processing module (23). The processing module (23) uses a 2-out-of-2 architecture to detect a waveform of the shaped signals, and provides a redundancy output of an axle pulse signal or an occupation signal. The occupation signal indicates an abnormal train occupation condition. An axle counting signal is determined according to the axle pulse signal, and axle counting is performed according to the axle counting signal, so as to determine whether a section is occupied or idle, and control the section to be closed or open.

Description

Axle counting equipment and axle counting system 【Technical Field】

The invention relates to the technical field of railway signals, in particular to an axle counting device and an axle counting system.

【Background technique】

Railway transportation has become our main long-distance transportation tool. Therefore, the railway transportation process requires precise monitoring. In the railway transportation system, the use status of the section must be monitored accurately in real time. When the occupancy status of the section is detected, the section can be closed to prevent other trains from entering the running section. How can the section start the section when it is idle? Use of segments. In order to check the occupancy/vacancy status of the track section, an axle counting device is introduced. By checking the number of axles between the axle counting points in the section, it is judged whether there is a car in the section.

The principle of the axle counting equipment is to set two axle counting points in the interval, and set a wheel sensor on the track of each axle counting point. The sensor signal of the wheel sensor is used to sense whether there is a car passing by, and then the number of wheels in the interval is counted. Judge the occupancy of the section, when the train is occupied, the train moves in, and when the section is free, the running train leaves.

However, there is currently a lack of data analysis to be more accurate and comprehensive, timely feedback control, accurate monitoring of the use status of the wheel sensors at the axle counting point (including short circuit, disconnection and derailment), and timely feedback control to close the use of this section, and The section axle counting equipment that accurately monitors and feedbacks the occupancy/vacancy status of axle counting points, so as to ensure the accurate monitoring and timely feedback control of section axle counting equipment to ensure the safety of rail train operation.

In view of this, to overcome the above shortcomings in the prior art, an axle counting device and an axle counting system are provided to solve the current shortcomings.

[Content of the invention]

The technical solution of the present invention is as follows: Provide an axle counting device, the axle counting device access terminal is connected to a wheel sensor, the wheel sensor includes two sensing units for generating induction signals, and the axle counting device output terminal Connected with the axle counter board and the output board respectively, the axle counter device includes:

A shaping module connected to the wheel sensor, the shaping module comprising: a shaping unit, a first output port, and a second output port arranged in a one-to-one correspondence with the sensing unit, one end of the shaping unit and the sensing unit The other end is connected to the first output port and the second output port respectively. The shaping unit is used to generate a shaping signal or a fault signal according to the sensing signal, and the shaping signal is output from the first output port. The failure signal is output from the second output port;

The processing module connected to the shaping module includes: two processing units, each of which is connected to the first output port, and a communication connection between the two processing units, the processing unit is used to detect the shaping signal When the two processing units detect that the shaping signal conforms to the shaft pulse rule, the shaping signal is output as the shaft pulse signal; when the two processing units detect that the pulse width of the shaping signal is greater than the predetermined When setting the threshold, output the occupied signal;

An isolated output module respectively connected to the second output port of the processing module and the shaping module, and the isolated output module is used to output the fault signal to the axle counter and output the axle pulse signal to The axle counter board and the occupancy signal are output to the output board.

Preferably, each shaping unit includes: four voltage comparison circuits, each of the voltage comparison circuits is provided with a voltage threshold, each of the voltage comparison circuits includes a first output terminal and a second output terminal, and the four voltage comparison circuits The voltage comparison circuit is sequentially connected through the first output terminal, and the second output terminals are all connected to the processing module,

The first voltage comparison circuit receives the sensing signal, and when the voltage of the sensing signal is higher than a first threshold voltage, it outputs a fault signal to the isolation output module; otherwise, it outputs the voltage of the sensing signal To the second voltage comparison circuit; when the voltage of the sensing signal is lower than the second threshold voltage, output the fault signal to the isolation output module, otherwise, output the voltage of the sensing signal to the third voltage comparison Circuit; when the voltage of the sensing signal is lower than the third threshold voltage, the output is idle to the processing module, otherwise, the voltage of the sensing signal is output to the fourth voltage comparison circuit; when the voltage of the sensing signal Higher than the fourth threshold voltage, output an occupied pulse to the processing module,

Wherein, the first threshold voltage is higher than the fourth threshold voltage, the fourth threshold voltage is higher than the third threshold voltage, and the third threshold voltage is higher than the second threshold voltage.

Preferably, the first voltage comparison circuit is provided with the first threshold voltage for detecting the disconnection/short-circuit state of the sensing unit;

The second voltage comparison circuit is provided with the second threshold voltage for detecting the off-rail state of the sensing unit;

The third voltage comparison circuit is provided with the third threshold voltage for detecting the idle state of the sensing unit;

The fourth voltage comparison circuit is provided with the fourth threshold voltage for detecting the occupied state of the sensing unit.

Preferably, the isolated output module includes a first photocoupler, a second photocoupler, and a third photocoupler, and the first photocoupler is connected to the axle counter board for isolating and outputting the axle pulse Signal; the second photocoupler is connected to the axle counter board for isolating and outputting the fault signal; the third photocoupler is connected to the output board for isolating and outputting the occupancy signal.

Preferably, the axle counting device further includes a prompt module for indicating the working status of the axle counting device.

Preferably, the axle counting equipment further includes an internal power supply module, which is connected to the two wheel sensors for powering the two wheel sensors; the internal power supply module includes four power supply units, each One end of the power supply unit is correspondingly connected to a sensing unit, and the power supply unit is used to provide a constant current source for the sensing unit.

Preferably, the internal power supply module further includes a protection unit, an isolation unit, and a voltage stabilizing unit connected in sequence. The protection unit receives an external direct current and converts the external direct current into four independent power sources through the isolation unit. The independent power supply corresponds to a voltage stabilizing unit, and the voltage stabilizing unit adjusts the voltage of the independent power source to the power supply unit to generate a constant current source to supply the induction unit.

Another technical solution of the present invention is as follows: an axle counting system is provided, and the axle counting system includes:

The wheel sensor is arranged on the axle counting point of the section, and the wheel sensor includes two sensing units for generating sensor signals;

An amplifier board connected to two wheel sensors, the amplifier board includes: a shaping module, a processing module, and an isolated output module, the shaping module includes: a shaping unit, a first output port and a The second output port, one end of the shaping unit is connected to the sensing unit, and the other end is respectively connected to the first output port and the second output port, the shaping unit is used to shape the sensing signal and generate a shaping signal or Fault signal, the shaping signal is output from the first output port, and the failure signal is output from the second output port; the processing module is connected to the shaping module, and the processing module includes: two processing units Each processing unit is connected to the first output port, and the two processing units are in communication connection. The processing unit is used to detect the waveform of the shaping signal and output the corresponding pulse signal according to the detection result. When the two When the processing unit detects that the shaped signal conforms to the shaft pulse rule, output the shaped signal as an axis pulse signal; when the two processing units detect that the pulse width of the shaped signal is greater than the preset threshold, output the first occupation signal; The isolated output module is respectively connected to the second output port of the processing module and the shaping module, and the isolated output module is used to output the fault signal to the axle counter board and output the axle pulse signal To the axle counter board, and output the first occupancy signal to the output board;

The axle counter connected to the amplifier board is used to identify the running direction of the train and calculate the number of wheels according to the axle counting signals of the wheel sensors, and to judge whether the section is occupied or free according to the number of wheels of the two wheel sensors. When the judgment result is occupied When the second occupancy signal is output, when the judgment result is idle, the idle signal is output, wherein the axle counting signal of the wheel sensor includes the axle pulse signals corresponding to the two sensing units;

The output boards respectively connected to the amplifying board and the axle counter board are used for controlling the closing or opening of the section according to the first occupation signal, the second occupation signal or the idle signal.

Preferably, the output board includes a judgment and selection module for triggering the use of the first drive-off section according to the occupancy signal of the axle counter, or for triggering according to the idle signal of the axle counter The second drive turns on the normal use of the interval.

Preferably, the axle counting system further includes a zero-resetting board, which is connected to the axle counting board and the output board;

And/or, the axle counting system further includes a power supply board, the power supply board includes a first power supply module and a second power supply module, and the first power supply module is the amplifier board, the axle counter board, and the complex The zero board and the output board provide direct current, and the second power supply module provides direct current for the axle counter, the zero reset board and the output board.

The beneficial effect of the present invention is that the axle counting device and axle counting system of the present invention shape the sensing signal by setting a shaping module connected to the sensing unit to generate a shaping signal, and the processing module connected to the shaping unit uses two out of two. The structure is used to detect the waveform of the shaping signal, and finally the axis pulse signal or the occupation signal is redundantly output. Among them, the occupancy signal is abnormal occupancy (non-normal occupancy of the train), the axle counting signal is determined according to the axle pulse signal, and axle counting is performed according to the axle counting signal to determine whether the section is occupied or idle, and to control the closing and opening of the section . The application of axle counting equipment to axle counting equipment can ensure the accuracy of section axle counting. At the same time, it can quickly respond to the failure of axle counting equipment, distinguish between abnormal occupation and normal occupation (normal occupation of train wheels), and ensure the operation of trains. safety.

【Explanation of drawings】

Fig. 1 is a schematic diagram of the structure of the axle counting device of the first embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the shaping module of the axle counting equipment according to the first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a shaping unit in the shaping module of the axle counting device according to Embodiment 1 of the present invention.

4 is a schematic diagram of the structure of the isolated output module of the axle counting device according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the internal power supply module of the axle counting device according to Embodiment 1 of the present invention.

Fig. 6 is a schematic structural diagram of an axle counting system according to the second embodiment of the present invention.

Fig. 7 is a schematic diagram of the structure of the axle counter plate in the axle counter system of the second embodiment of the present invention.

Fig. 8 is a schematic diagram of the structure of the output plate in the axle counting system of the second embodiment of the present invention.

【Detailed ways】

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description for the embodiments and specific examples of the present invention; this is not the only way to implement or use the specific embodiments of the present invention. The implementation manners cover the features of multiple specific embodiments, and the method steps and sequences used to construct and operate these specific embodiments. However, other specific embodiments can also be used to achieve the same or equal functions and sequence of steps.

Example 1

As shown in Fig. 1, Fig. 1 shows the structure diagram of the axle counting equipment according to the first embodiment of the present invention. The axle counting device 2 includes a shaping module 22, as shown in FIG. 2, which is a structural diagram of the shaping module of the axle counting device according to an embodiment of the present invention. The shaping module 22 includes shaping units 221-224 connected to the sensing units 111, 112, 121, 122 in one-to-one correspondence, a first output port 225 and a second output port 226, a processing module 23 connected to the first output port 225, and The isolated output module 25 connected to the second output port 226 and the processing module 23, an internal power module 24 for supplying power to the sensing units 111, 112, 121, 122; and a prompt module for detecting whether the axle counting device is working properly twenty one.

Among them, each shaping unit 221-224 includes a voltage comparison circuit 2201-2204. The first voltage comparison circuit 2201, the second voltage comparison circuit 2202, and the third voltage comparison circuit 2203 all include a first output terminal A and a second output terminal. B, the fourth voltage comparison circuit 2204 includes a first output terminal A. As shown in FIG. 4, FIG. 4 shows the structure diagram of the shaping unit 221 of the axle counting equipment according to the embodiment of the present invention. The structure of the shaping units 222-224 is the same as the shaping unit 221. The shaping unit 221 includes a first voltage comparison circuit 2201, a second voltage comparison circuit 2202, a third voltage comparison circuit 2203, and a fourth voltage comparison circuit 2204 connected in sequence, and the first output terminal A is used to output the generated fault signal and the shaping signal Specifically, the second output terminal B of the first voltage comparison circuit 2201 is connected to the input terminal of the second voltage comparison circuit 2202, and the second output terminal B of the second voltage comparison circuit 2202 is connected to the input terminal of the third voltage comparison circuit 2203 Connected, the second output terminal B of the third voltage comparison circuit 2203 is connected to the input terminal of the fourth voltage comparison circuit 2204.

The first voltage comparison circuit 2201 is used to detect the disconnection status of the sensing units 111, 112, 121, and 122, and is provided with a first threshold voltage. When the voltage of the sensing signal is higher than the first threshold voltage, it passes through the first output terminal A outputs the fault signal to the isolation output module, otherwise the voltage of the sensing signal is output to the second voltage comparison circuit 2202 through the second output terminal B;

The second voltage comparison circuit 2202 is used to detect the off-rail state of the sensing units 111, 112, 121 and 122, and is provided with a second threshold voltage. When the voltage of the sensing signal is lower than the second threshold voltage, it passes through the first output terminal A Output the fault signal to the isolated output module, otherwise output the voltage of the sensing signal to the third voltage comparison circuit through the second output terminal B;

The third voltage comparison circuit 2203 is used to detect the occupancy state of the sensing units 111, 112, 121, and 122, and is provided with a third threshold voltage. When the voltage of the sensing signal is lower than the third threshold voltage, it is output through the first output terminal A Idle to the processing module, otherwise output the sensing signal to the fourth voltage comparison circuit 2204 through the second output terminal B;

The fourth voltage comparison circuit 2204 is used to detect the occupancy state of the sensing units 111, 112, 121, and 122, and is provided with a fourth threshold voltage. When the voltage of the sensing signal is higher than the fourth threshold voltage, it passes through the first output terminal A, Output occupied pulse to the processing module.

In order to further determine whether the wheel sensor is in an occupied or idle state, the state of the sensing signal is determined according to the change trend of the sensing signal voltage. If the voltage of the sensing signal is between the third threshold voltage and the fourth threshold voltage, it indicates that the sensing units 111, 112, 121, and 122 are in the state transition process. When the voltage of the sensing signal is in an upward trend, it indicates that the sensing units 111, 112, 121, and 122 are in the process of transitioning from idle to occupied state. When the voltage of the sensing signal is in a downward trend, it indicates that the sensing unit is in an occupied state. Idle state transition process.

The present invention includes 4 voltage comparison circuits in the shaping unit, and each voltage comparison circuit is provided with a threshold voltage. When the sensing unit is in a short circuit/disconnection state, the sensing signal voltage detected by the shaping unit is higher than the first threshold voltage , The shaping unit outputs a fault signal; when the sensing unit is off-rail, the sensing signal voltage detected by the shaping unit is lower than the second threshold voltage, and the shaping unit outputs a failure signal; when the sensing unit is in an idle state, the shaping unit detects The voltage of the sensing signal is between the second threshold voltage and the third threshold voltage, and the output of the shaping unit is idle; when the sensing unit is in an occupied state, it is detected that the voltage of the sensing signal is between the fourth threshold voltage and the first threshold voltage , The shaping unit outputs a single pulse with a certain pulse width, which is an occupied pulse.

In the absence of faults (short circuit, open circuit and derailment), if there is no car in the interval, it will always output idle, if there is a car in the interval, the output is occupied.

In the event of a fault (short circuit, open circuit and off-rail), the output is a fault signal. If there is a fault signal, it can be directly output to the axle counter through the second output port 226, and then output the occupied signal to the output board, turning off the use of the section and prohibiting other trains from entering the station.

The shaping module of the present invention can directly output the fault signals generated by the short circuit, open circuit and derailment of the induction unit in the axle counting process, and quickly respond to the fault, so as to ensure the safety during the running of the train.

The processing module 23 includes a processing unit 231 and a processing unit 232. The processing unit 231 and the processing unit 232 can respectively receive four groups of shaped signals, detect and identify the waveforms of the shaped signals, and generate corresponding pulse signals according to the detection results. The processing unit 231 and the processing unit 232 may both be CPUs. When the processing unit 231 and the processing unit 232 both detect that the shaping signal is a complete pulse waveform and the pulse width is less than the first preset threshold, it indicates that the induction unit is normally occupied by the train, and the shaping signal is output as an axle pulse signal (AZ signal), The shaft pulse signal is a regular pulse; when the processing unit 231 and the processing unit 232 both detect that the pulse width formed by the shaping signal waveform exceeds the second preset threshold, it indicates that the sensing unit is abnormally occupied (that is, the sensing unit Occupied by other than the train), output the first occupied signal (AK signal). The processing unit 231 and the processing unit 232 are in communication connection, and only when the detection results of the two processing units 231 and 232 are consistent, the AZ signal or the AK signal is redundantly output.

The processing module of the present invention adopts a two-out-of-two architecture. Through two CPUs, each CPU independently detects the waveforms of the 4 shaping signals output by the shaping unit, and independently generates 4 sets of pulse signals, and compares whether the detection results of the two CPUs are Consistent (that is, whether they are all AZ signals or all AK signals), if yes, the detection result of the CPU is redundantly output. The two out of two architecture can ensure the accuracy of the waveform detection process.

As shown in Fig. 4, Fig. 4 shows the structure diagram of the isolated output module of the axle counting device according to the embodiment of the present invention. The isolated output module 25 includes photocouplers 251-253. Both the photocoupler 251 and the photocoupler 252 are connected to the axle counter board 3, the photocoupler 253 is connected to the output board 4, and the axle counter board 3 is connected to the output board 4. The photocoupler 251 can output the axle pulse signal to the axle counter board 3, the photocoupler 252 can output the fault signal to the axle counter board 3, and the photocoupler 253 can output the occupation signal to the output board 4.

As shown in Fig. 5, Fig. 5 shows the structure diagram of the internal power supply module of the axle counting device according to the embodiment of the present invention.

The internal power module of the axle counting device of the present invention can provide four independent constant current sources to respectively supply the corresponding four sensing units, without being interfered by the external power supply, and can reflect the impedance change of the sensing unit as a voltage change.

Example 2

As shown in Fig. 6, Fig. 6 shows a structural diagram of an axle counting system according to an embodiment of the present invention. Axle counting equipment includes outdoor equipment and indoor equipment. The outdoor equipment includes wheel sensors 11 and 12 on the two axle counting track rails of the section, which are used to detect train wheels. The wheel sensors 11 and 12 include two sensing units, the sensing units 111, 112, 121, 122 respectively generate a sensor signal. The indoor equipment includes the axle counting device 2 connected to the wheel sensors 11, 12. The axle counting device 2 is the axle counting device 2 of embodiment 1. For details, please refer to the description of embodiment 1, which will not be repeated here. In this embodiment In the example, the axle counting device 2 is placed in the magnifying board, and the function of the axle counting device 2 is equivalent to the magnifying board. For ease of description, the axle counting device 2 is the magnifying board; the axle counting board 3 connected to the axle counting device 2 is The output board 4 connected to the axle counting device 2 and the axle counting board 3; the zero reset board 5 connected to the axle counting board 3 and the output board 4; for the axle counting device 2, the axle counting board 3, the output board 4, and the reset Power board 6 powered by zero board 5.

The axle counting board 3 can judge the running direction of the train and count the number of wheels according to the two axle pulse signals of the wheel sensors, which is the axle counting signal, and then judge the occupancy/idle status of the section. If occupied, output the second occupancy signal to the output board 4. If idle, output idle signal to output board 4.

The output board 4 can control the section to be closed according to the first and second occupancy signals and prohibit the train from entering the station, or control the section to open according to the idle signal to allow the train to enter the station.

The zero reset board 5 can clear the data of the output board 4 and the axle counter 3 according to the conditions set by the user, or manually control the data of the output board 4 and the axle counter 3 to reset, such as setting a reset button, Press the reset button to reset manually.

As shown in Fig. 7, Fig. 7 shows the structure diagram of the axle counter in the second embodiment of the present invention. The axle counter 3 includes a first judgment module 31 and a second judgment module 32. The first judgment module 31 and the second judgment module 32 are connected through the output terminal C of the first judgment module 31, and the output terminal of the second judgment module 32 D Connect output board 4. The first judgment module 31 is used to identify the running direction of the train and calculate the number of wheels according to the axle counting signal of the wheel sensor, wherein the axle counting signal of the wheel sensor includes the axle pulse signals of the two sensing units of the wheel sensor; the second judgment module 32 According to the number of wheels, determine the occupancy/idle state of the section.

The axle counting board 3 axle counting process: When the first judgment module 31 receives the axle pulse signal, it compares the time sequence of the axle pulse signals (AZ signals) generated by the two sensing units of the wheel sensor to judge the direction of train movement, and The number of wheels is calculated according to the number of axle pulse signals of the wheel sensor, and then the number of wheels is output to the second judgment module 32 through the output terminal C.

The second judgment module 32 judges the occupied/idle state of the section according to the number of wheels. For example, when the number of wheels meets the preset number, the section is in the occupied state, and the output terminal D outputs the second occupancy signal to the output board 4; otherwise, the section is in the idle state and outputs the idle signal to the output board 4.

The output board 4 is connected with the amplifier board 2 and the axle counter board 3, as shown in FIG. 8, which shows the structure diagram of the output board in the embodiment of the present invention. The output board 4 can receive the first occupancy signal generated by the abnormal occupancy of the amplifying board 2, and can also receive the second occupancy signal/idle signal output by the axle counter board 3 according to the axle counter signal to determine the interval occupancy/idle state. The judgment and selection module 41 of the output board 4 can trigger the first drive 42 to close the use of the section according to the first and second occupancy signals, prohibit other trains from entering the station, or can trigger the second drive 43 to open the section according to the idle signal Normal use, allowing trains to enter the station.

In addition, the axle counting system also includes a zero-resetting board 5, which is connected to the axle-counting board 3 and the output board 4, and the data of the axle-counting board 3 and the output board 4 can be cleared through the zero-resetting board 5. For example, when the number of wheels on the axle counter output board changes to meet the conditions, the zero reset board 5 automatically clears the data on the axle counter 3 and the output board 4, or you can manually control the reset board 5 to control the axle counter 3 and output The data of board 4 can be cleared. For example, after the axle counting system has eliminated the fault, it can be cleared manually.

The axle counting system also includes a power supply board 6. The power supply board 6 is a two-in-one power supply, including two power supplies of the first voltage and the second voltage. It provides the second power supply for the amplifier board 2, the axle counting board 3, the output board 4 and the zero reset board 5. The direct current of one voltage also provides direct current of the second voltage for the axle counter board 3, the output board 4 and the zero reset board 5.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims (10)

1. An axle counting device, characterized in that the access end of the axle counting device is connected to a wheel sensor, the wheel sensor includes two sensing units for generating induction signals, and the output end of the axle counting device is connected to the axle counter plate. Respectively connected with the output board, the axle counting equipment includes:

   A shaping module connected to the wheel sensor, the shaping module comprising: a shaping unit, a first output port, and a second output port arranged in a one-to-one correspondence with the sensing unit, one end of the shaping unit and the sensing unit The other end is connected to the first output port and the second output port respectively. The shaping unit is used to generate a shaping signal or a fault signal according to the sensing signal, and the shaping signal is output from the first output port. The failure signal is output from the second output port;

   The processing module connected to the shaping module includes: two processing units, each of which is connected to the first output port, and a communication connection between the two processing units, the processing unit is used to detect the shaping signal When the two processing units detect that the shaping signal conforms to the shaft pulse rule, the shaping signal is output as the shaft pulse signal; when the two processing units detect that the pulse width of the shaping signal is greater than the predetermined When setting the threshold, output the occupied signal;

   An isolated output module respectively connected to the second output port of the processing module and the shaping module, and the isolated output module is used to output the fault signal to the axle counter and output the axle pulse signal to The axle counter board and the occupancy signal are output to the output board.
2. The axle counting device according to claim 1, wherein each shaping unit comprises: four voltage comparison circuits, each of the voltage comparison circuits is provided with a voltage threshold, and each of the voltage comparison circuits includes a first An output terminal and a second output terminal, the four voltage comparison circuits are connected in sequence through the first output terminal, and the second output terminals are all connected to the processing module,

   The first voltage comparison circuit receives the sensing signal, and when the voltage of the sensing signal is higher than a first threshold voltage, it outputs a fault signal to the isolation output module; otherwise, it outputs the voltage of the sensing signal To the second voltage comparison circuit; when the voltage of the sensing signal is lower than the second threshold voltage, output the fault signal to the isolation output module, otherwise, output the voltage of the sensing signal to the third voltage comparison Circuit; when the voltage of the sensing signal is lower than the third threshold voltage, the output is idle to the processing module, otherwise, the voltage of the sensing signal is output to the fourth voltage comparison circuit; when the voltage of the sensing signal Higher than the fourth threshold voltage, output an occupied pulse to the processing module,

   Wherein, the first threshold voltage is higher than the fourth threshold voltage, the fourth threshold voltage is higher than the third threshold voltage, and the third threshold voltage is higher than the second threshold voltage.
3. The axle counting device according to claim 2, wherein the first voltage comparison circuit is provided with the first threshold voltage for detecting the disconnection/short-circuit state of the sensing unit;

   The second voltage comparison circuit is provided with the second threshold voltage for detecting the off-rail state of the sensing unit;

   The third voltage comparison circuit is provided with the third threshold voltage for detecting the idle state of the sensing unit;

   The fourth voltage comparison circuit is provided with the fourth threshold voltage for detecting the occupied state of the sensing unit.
4. The axle counting device according to claim 1, wherein the isolated output module includes a first photocoupler, a second photocoupler, and a third photocoupler, the first photocoupler and the counter The shaft plate is connected to output the shaft pulse signal; the second photocoupler is connected to the shaft counter plate to output the fault signal; the third photocoupler is connected to the output plate Connected to output the occupied signal in isolation.
5. The axle counting device according to claim 1, wherein the axle counting device further comprises a prompt module for indicating the working status of the axle counting device.
6. The axle counting device according to claim 1, wherein the axle counting device further comprises an internal power supply module, and the internal power supply module is connected to the two wheel sensors and is used for powering the two wheel sensors; The internal power supply module includes four power supply units, and one end of each power supply unit is correspondingly connected to an induction unit, and the power supply unit is used to provide a constant current source for the induction unit.
7. The axle counting device according to claim 6, wherein the internal power supply module further comprises a protection unit, an isolation unit, and a voltage stabilizing unit connected in sequence, and the protection unit receives external direct current, and the The external direct current is converted into four independent power sources, and each independent power source corresponds to a voltage stabilizing unit, and the voltage stabilizing unit adjusts the voltage of the independent power source to the power source unit to generate a constant current source to supply the induction unit.
8. An axle counting system, characterized in that the axle counting system includes:

   The wheel sensor is arranged on the axle counting point of the section, and the wheel sensor includes two sensing units for generating sensor signals;

   An amplifier board connected to two wheel sensors, the amplifier board includes: a shaping module, a processing module, and an isolated output module, the shaping module includes: a shaping unit, a first output port and a The second output port, one end of the shaping unit is connected to the sensing unit, and the other end is respectively connected to the first output port and the second output port, the shaping unit is used to shape the sensing signal and generate a shaping signal or Fault signal, the shaping signal is output from the first output port, and the failure signal is output from the second output port; the processing module is connected to the shaping module, and the processing module includes: two processing units Each processing unit is connected to the first output port, and the two processing units are in communication connection. The processing unit is used to detect the waveform of the shaping signal and output the corresponding pulse signal according to the detection result. When the two When the processing unit detects that the shaped signal conforms to the shaft pulse rule, output the shaped signal as an axis pulse signal; when the two processing units detect that the pulse width of the shaped signal is greater than the preset threshold, output the first occupation signal; The isolated output module is respectively connected to the second output port of the processing module and the shaping module, and the isolated output module is used to output the fault signal to the axle counter board and output the axle pulse signal To the axle counter board, and output the first occupancy signal to the output board;

   The axle counter connected to the amplifier board is used to identify the running direction of the train and calculate the number of wheels according to the axle counting signals of the wheel sensors, and to judge whether the section is occupied or free according to the number of wheels of the two wheel sensors. When the judgment result is occupied When the second occupancy signal is output, when the judgment result is idle, the idle signal is output, wherein the axle counting signal of the wheel sensor includes the axle pulse signals corresponding to the two sensing units;

   The output boards respectively connected to the amplifying board and the axle counter board are used for controlling the closing or opening of the section according to the first occupation signal, the second occupation signal or the idle signal.
9. The axle counting system according to claim 8, wherein the output board includes a judgment and selection module for triggering the use of the first drive-off interval according to the occupation signal of the axle counting board, or for The normal use of the second driving on section is triggered according to the idle signal of the axle counter.
10. The axle counting system according to claim 8, characterized in that the axle counting system further comprises a zero reset board, the zero reset board is connected to the axle counting board and the output board;

    And/or, the axle counting system further includes a power supply board, the power supply board includes a first power supply module and a second power supply module, and the first power supply module is the amplifier board, the axle counter board, and the complex The zero board and the output board provide direct current, and the second power supply module provides direct current for the axle counter, the zero reset board and the output board.

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