WO2020253672A1 - 能够防止丢轴的计轴方法、计轴系统及计轴设备 - Google Patents

能够防止丢轴的计轴方法、计轴系统及计轴设备 Download PDF

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WO2020253672A1
WO2020253672A1 PCT/CN2020/096316 CN2020096316W WO2020253672A1 WO 2020253672 A1 WO2020253672 A1 WO 2020253672A1 CN 2020096316 W CN2020096316 W CN 2020096316W WO 2020253672 A1 WO2020253672 A1 WO 2020253672A1
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wheel
time
signal
pulse width
axle
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PCT/CN2020/096316
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English (en)
French (fr)
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郭丰明
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深圳科安达电子科技股份有限公司
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Priority claimed from CN201910523635.2A external-priority patent/CN110304108B/zh
Priority claimed from CN201910523642.2A external-priority patent/CN110304109B/zh
Application filed by 深圳科安达电子科技股份有限公司 filed Critical 深圳科安达电子科技股份有限公司
Publication of WO2020253672A1 publication Critical patent/WO2020253672A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/16—Devices for counting axles; Devices for counting vehicles

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  • the invention relates to the technical field of railway signals, in particular to an axle counting method, axle counting system and axle counting equipment capable of preventing axle loss.
  • the track circuit method In the railway transportation system, in order to check the train occupancy status of the track section or the switch section, the track circuit method is generally used. However, in areas with special environments, because the track circuit cannot reliably check the occupancy/vacancy of the section, the axle counting technology is introduced, and the electromagnetic induction type axle counting sensor is used to check between two or more detection points. According to the number of axles in the zone, it is judged whether there is a car occupied in the zone.
  • the two sensing circuits SI and SII respectively induce and form pulse signals. Since the train wheels pass through the two magnetic heads of the wheel sensor one after another, the two pulse signals must meet the characteristics of overlap in order to be considered as a valid wheel sensor axle counting signal. As shown in Figure 1, the two pulse signals The phase relationship of represents the direction of wheel movement, and the system uses this to identify the direction of wheel movement.
  • the purpose of the present invention is to provide an axle counting method, axle counting system and axle counting device that can prevent axle loss in view of the above-mentioned defects of the prior art.
  • the technical solution of the present invention is as follows: provide an axle counting method capable of preventing axle loss, characterized in that the axle counting method includes:
  • S3 Determine a compensation value according to the preset first compensation strategy according to the time difference, so as to compensate the pulse width of the second wheel induction signal.
  • the first compensation strategy is: when the time difference is less than or equal to the first time threshold, the compensation value is the first compensation time value; when the time difference is greater than the first time threshold, the compensation value is the second compensation Time value.
  • the axle counting method further includes between step S2 and step S3:
  • step S21 Obtain the pulse width of the second wheel sensing signal, and when the pulse width of the second wheel sensing signal is less than or equal to the preset width threshold, go to step S3; when the pulse width of the second wheel sensing signal is greater than the preset width threshold When, step S3 is not executed.
  • the axle counting method further includes:
  • step S0 specifically includes:
  • the axle counting method further includes: S4, filtering the axle counting signal of the wheel sensor according to the first wheel induction signal and the compensated second wheel induction signal.
  • axle counting system capable of preventing axle loss
  • axle counting system comprising:
  • a signal acquisition module for acquiring the first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor
  • the detection calculation module is configured to detect the first time when the first wheel induction signal has a pulse and the second time when the second wheel induction signal has a pulse, and determine the time difference between the first time and the second time;
  • the compensation module is used to determine the compensation value according to the preset first compensation strategy according to the time difference, so as to compensate the pulse width of the second wheel induction signal.
  • the axle counting system further includes:
  • a pulse width detection module for acquiring the pulse width of the second wheel induction signal
  • the compensation module is also used to compensate the pulse width of the second wheel induction signal when the pulse width of the second wheel induction signal is less than or equal to the preset width threshold; when the pulse width of the second wheel induction signal is greater than the preset width threshold, When the width threshold is set, the pulse width of the second wheel induction signal is not compensated.
  • the axle counting system further includes:
  • the strategy formulation module is used for detecting and determining the first compensation strategy according to the operating data of the wheel sensor in response to the change in the operating state of the wheel sensor.
  • axle counting device capable of preventing axle loss
  • axle counting device comprising:
  • At least two wheel sensors including two magnetic heads;
  • the induction circuit connected with the magnetic head is used to form an axis pulse signal according to the change of the magnetic field of the magnetic head;
  • Pulse width compensation circuit used to compensate the pulse width of the input signal
  • Memory used to store instructions
  • a processor for executing the instructions
  • the execution of the instructions when executed on the processor includes the following processes:
  • a compensation value is determined according to a preset first compensation strategy, and the pulse width compensation circuit is controlled to compensate the pulse width of the second wheel induction signal.
  • the beneficial effect of the present invention is that the axle counting method, axle counting system and axle counting device of the present invention are based on the time difference between the appearance of two pulses in the axle counting signal of the wheel sensor, and the compensation value is determined according to the first compensation strategy.
  • the pulse width of the generated pulse is compensated to reduce the scenario where the rising and falling edges of the SI pulse completely cover the SII pulse to prevent losing axis.
  • Fig. 1 is a schematic diagram of the formation of the axle counting signal of the wheel sensor in the present invention.
  • Fig. 2 is a waveform acquisition diagram when the axle counting signal of the wheel sensor in the present invention loses axle.
  • Fig. 3 is a pulse diagram when the axle counting signal of the wheel sensor of the present invention loses axle.
  • Fig. 4 is a flowchart of the axle counting method capable of preventing axle loss according to Embodiment 1 of the present invention.
  • Fig. 5 is a schematic diagram of the pulse width compensation of the axle counting signal of the wheel sensor in the present invention.
  • Fig. 6 is a flowchart of an axle counting method capable of preventing axle loss according to Embodiment 2 of the present invention.
  • Fig. 7 is a schematic diagram of the axle pulse formed when the wheel reverses after passing the wheel sensor in the present invention.
  • Fig. 8 is a flowchart of an axle counting method capable of preventing axle loss according to Embodiment 3 of the present invention.
  • Fig. 9 is a structural block diagram of an axle counting system capable of preventing axle loss according to Embodiment 4 of the present invention.
  • Fig. 10 is a structural block diagram of an axle counting system capable of preventing axle loss according to the fifth embodiment of the present invention.
  • Fig. 11 is a block diagram of the axle counting system capable of preventing axle loss according to the sixth embodiment of the present invention.
  • Fig. 12 is a structural block diagram of an axle counting device capable of preventing axle loss according to Embodiment 7 of the present invention.
  • Embodiment 1 of the present invention provides an axle counting method capable of preventing axle loss. As shown in FIG. 4, the axle counting method includes:
  • S101 Acquire a first wheel sensing signal and a second wheel sensing signal of the two sensing circuits of the wheel sensor.
  • S102 Detect a first time when a pulse occurs in the first wheel induction signal and a second time when a pulse occurs in the second wheel induction signal, and determine a time difference between the first time and the second time.
  • S103 Determine a compensation value according to the preset first compensation strategy according to the time difference, so as to compensate the pulse width of the second wheel induction signal.
  • step S101 the first wheel sensing signal and the second wheel sensing signal are both pulse signals, and the two partially overlap.
  • step S102 refer to FIG. 5, the pulse widths of the first wheel sensing signal and the second wheel sensing signal are T 1 and T 2 respectively, and the pulse widths of the first wheel sensing signal and the second wheel sensing signal are detected respectively.
  • step S103 the time difference T 3 is substituted into the first compensation strategy to calculate the compensation value T 5 , and the pulse width of the second wheel induction signal is compensated.
  • the compensated pulse width is T 2 +T 5 to avoid being affected by the first wheel
  • the induction signal is completely covered, and after compensation, it complies with the superposition rule of two pulse signals in the axle counting signal of the wheel sensor to avoid the phenomenon of axle loss.
  • the first compensation strategy is: when the time difference T 3 is less than or equal to the first time threshold, the compensation value T 5 is the first compensation time value; when the time difference T 3 is greater than the first time threshold, The compensation value T 5 is the second compensation time value.
  • Embodiment 2 of the present invention provides an axle counting method capable of preventing axle loss. As shown in FIG. 6, the axle counting method includes:
  • S201 Acquire the first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor.
  • S202 Detect a first time when a pulse occurs in the first wheel induction signal and a second time when a pulse occurs in the second wheel induction signal, and determine a time difference between the first time and the second time.
  • step S203 Obtain the pulse width of the second wheel sensing signal, and when the pulse width of the second wheel sensing signal is less than or equal to the preset width threshold, go to step S204; when the pulse width of the second wheel sensing signal is greater than the preset width threshold At this time, it ends, and step S204 is not executed.
  • S204 Determine a compensation value according to the preset first compensation strategy according to the time difference, so as to compensate the pulse width of the second wheel induction signal.
  • step S203 when the pulse width of the second wheel sensing signal is less than or equal to the preset width threshold, it is determined that the train speed is normal and no train deceleration occurs.
  • the pulse width of the second wheel sensing signal can be compensated; when the pulse width of the second wheel sensing signal is greater than the preset width threshold, it is judged that the train is decelerating, stopping, or reversing. The pulse width of the wheel induction signal is compensated.
  • Embodiment 3 of the present invention provides an axle counting method capable of preventing axle loss. Please refer to FIG. 8.
  • the axle counting method includes:
  • S301 In response to a change in the operating state of the wheel sensor, detect and determine the first compensation strategy according to the operating data of the wheel sensor.
  • S302 Acquire the first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor.
  • S303 Detect the first time when the first wheel induction signal has a pulse and the second time when the second wheel induction signal has a pulse, and determine the time difference between the first time and the second time.
  • S304 Determine a compensation value according to the preset first compensation strategy according to the time difference, so as to compensate the pulse width of the second wheel induction signal.
  • S305 Filter the axle counting signal of the wheel sensor according to the first wheel sensing signal and the compensated second wheel sensing signal.
  • Step S301 specifically includes the following steps:
  • S3012 Detect the pulse width of the first wheel sensing signal and the pulse width of the second wheel sensing signal, and determine the pulse width difference between the first wheel sensing signal and the second wheel sensing signal.
  • S3013 Detect a first time when a pulse occurs in the first wheel induction signal and a second time when a pulse occurs in the second wheel induction signal, and determine a time difference between the first time and the second time.
  • S3014 Perform statistical analysis on the pulse width difference and the time difference, and determine the first compensation strategy according to the statistical analysis result.
  • the applicant found that the axle counting signals of all wheel sensors The pulse width difference of the two pulse signals is less than the first compensation time value.
  • the first compensation strategy is determined as follows: when the time difference T 3 is less than or equal to the first time threshold, the compensation value T 5 is the first compensation time value; when the time difference T 3 is greater than the first time threshold, the compensation value T 5 is the second compensation time value.
  • Embodiment 4 of the present invention provides an axle counting system that can prevent axle loss.
  • the axle counting system includes: a signal acquisition module 10, a detection calculation module 20, and a compensation module 30.
  • the signal acquisition The module 10 is used to obtain the first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor;
  • the detection calculation module 20 is used to detect the first moment when the pulse of the first wheel sensing signal appears and the first time The second moment when the pulse of the two-wheel induction signal appears, determines the time difference between the first moment and the second moment;
  • the compensation module 30 is configured to determine the compensation value according to the time difference according to the preset first compensation strategy, so as to The pulse width of the second wheel induction signal is compensated.
  • the first wheel sensing signal and the second wheel sensing signal are both pulse signals, and the two partially overlap.
  • the pulse widths of the first wheel sensing signal and the second wheel sensing signal are respectively T 1 and T 2 , and the detection calculation module 20 is used to detect pulses of the first wheel sensing signal and the second wheel sensing signal.
  • the compensation module 30 is used to substitute the time difference T 3 into the first compensation strategy to calculate the compensation value T 5 , to compensate the pulse width of the second wheel induction signal, and the compensated pulse width is T 2 +T 5 to avoid being affected by the first wheel
  • the induction signal is completely covered, and after compensation, it complies with the superposition rule of two pulse signals in the axle counting signal of the wheel sensor to avoid the phenomenon of axle loss.
  • the first compensation strategy is: when the time difference T 3 is less than or equal to the first time threshold, the compensation value T 5 is the first compensation time value; when the time difference T 3 is greater than the first time threshold, The compensation value T 5 is the second compensation time value.
  • Embodiment 5 of the present invention provides an axle counting system that can prevent axle loss.
  • the axle counting system includes: a signal acquisition module 10, a detection calculation module 20, a compensation module 30, and a pulse width detection module 40.
  • the signal acquisition module 10 is used to acquire the first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor;
  • the detection calculation module 20 is used to detect the first wheel sensing signal pulse Determine the time difference between the first time and the second time at a time and the second time when the second wheel induction signal has a pulse;
  • the pulse width detection module 40 is used to obtain the pulse width of the second wheel induction signal;
  • the module 30 is used for determining the compensation value according to the preset first compensation strategy when the pulse width of the second wheel induction signal is less than or equal to the preset width threshold value, so as to compensate the pulse of the second wheel induction signal.
  • the width is compensated; when the pulse width of the second wheel induction signal is greater than the preset width threshold, the pulse width of
  • the pulse width detection module 40 is provided in this embodiment to obtain the pulse width of the second wheel sensing signal before performing the pulse width compensation on the second wheel sensing signal.
  • the pulse width of the second wheel sensing signal is less than or equal to
  • the width threshold is preset, it is judged that the train is running at a normal speed, and the train does not decelerate, stop, or reverse, and the pulse width of the second wheel induction signal can be compensated; when the pulse width of the second wheel induction signal is greater than the preset
  • the width threshold is used, it is judged that the train has decelerated, stopped, or reversed, and the pulse width of the second wheel induction signal is not compensated.
  • Embodiment 6 of the present invention provides an axle counting system that can prevent axle loss.
  • the axle counting system includes: a strategy formulation module 50, a signal acquisition module 10, a detection calculation module 20, and a compensation module 30 ,
  • the strategy formulation module 50 is used to detect and determine the first compensation strategy according to the operating data of the wheel sensor in response to changes in the operating state of the wheel sensor;
  • the signal acquisition module 10 is used to acquire two transmissions of the wheel sensor The first wheel induction signal and the second wheel induction signal of the sensor circuit;
  • the detection calculation module 20 is used to detect the first time when the first wheel induction signal has a pulse and the second time when the second wheel induction signal has a pulse, The time difference between the first time and the second time is determined;
  • the compensation module 30 is configured to determine a compensation value according to the time difference according to a preset first compensation strategy, so as to compensate the pulse width of the second wheel induction signal.
  • the strategy formulation module 50 includes: an acquisition unit 501, a first detection calculation unit 502, a second detection calculation unit 503, and a statistics and formulation unit 504, wherein the monitoring unit 501 is configured to respond to changes in the operating state of the wheel sensors, The first wheel sensing signal and the second wheel sensing signal of the two sensing circuits of the wheel sensor are acquired through the signal acquisition module 10; the first detection calculation unit 502 is used to detect the pulse width of the first wheel sensing signal and the first wheel sensing signal.
  • the pulse width of the second wheel induction signal is used to determine the pulse width difference between the first wheel induction signal and the second wheel induction signal;
  • the second detection calculation unit 503 is used to detect the first moment of the pulse of the first wheel induction signal and the The second time when the pulse of the second wheel induction signal appears, the time difference between the first time and the second time is determined;
  • the statistics and formulation unit 504 is used to perform statistical analysis on the pulse width difference and the time difference, and according to the statistical analysis result Determine the first compensation strategy.
  • the applicant found that the axle counting signals of all wheel sensors The pulse width difference of the two pulse signals is less than the first compensation time value.
  • the first compensation strategy is determined as follows: when the time difference T 3 is less than or equal to the first time threshold, the compensation value T 5 is the first compensation time value; when the time difference T 3 is greater than the first time threshold, the compensation value T 5 is the second compensation time value.
  • Embodiment 7 of the present invention provides an axle counting device that can prevent axle loss.
  • the axle counting device includes: at least two wheel sensors, a sensing circuit, a pulse width compensation circuit, and a command storage device. Memory, and a processor for executing instructions.
  • each wheel sensor includes two magnetic heads, the induction circuit and the magnetic head are arranged in a one-to-one correspondence, and the induction circuit is used to form an axis pulse signal according to the change of the magnetic field of the magnetic head.
  • the pulse width compensation circuit is used to compensate the pulse width of the input signal.
  • the processor is a central processing unit for processing various instructions.
  • the second processor can be a central processing unit (CPU), a digital signal processor (DSP), one or more processor cores, a single-core processor, or dual-core processing Processors, multi-core processors, microprocessors, host processors, controllers, multiple processors or controllers, chips, microchips, one or more circuits, loops, logic units, integrated circuits (ICs), dedicated ICs ( ASIC) or any other suitable multi-purpose or dedicated processor or controller.
  • CPU central processing unit
  • DSP digital signal processor
  • processor cores a single-core processor
  • dual-core processing Processors multi-core processors
  • microprocessors microprocessors
  • host processors controllers
  • multiple processors or controllers chips
  • microchips one or more circuits, loops, logic units, integrated circuits (ICs), dedicated ICs ( ASIC) or any other suitable multi-purpose or dedicated processor or controller.
  • ASIC dedicated ICs
  • the execution of the instruction when executed on the processor includes the following processes:
  • a compensation value is determined according to a preset first compensation strategy, and the pulse width compensation circuit is controlled to compensate the pulse width of the second wheel induction signal.
  • the axle counting device further includes: a filter circuit for filtering axle counting signals of the wheel sensors.
  • execution of the instruction when executed on the processor further includes the following process:
  • the pulse width compensation circuit When the pulse width of the second wheel induction signal is less than or equal to the preset width threshold, the pulse width compensation circuit is controlled to compensate the pulse width of the second wheel induction signal; when the pulse width of the second wheel induction signal is greater than the preset width threshold When the width threshold is set, the pulse width compensation circuit is controlled not to compensate the pulse width of the second wheel induction signal.
  • execution of the instruction when executed on the processor further includes the following process:

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Abstract

一种能够防止丢轴的计轴方法，包括：获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号(S101、S201、S302)；检测第一车轮感应信号出现脉冲的第一时刻(t 1)和第二车轮感应信号出现脉冲的第二时刻(t 2)，确定第一时刻(t 1)和第二时刻(t 2)之间的时间差(T 3) (S102、S202、S303)；根据时间差(T 3)，按照预设的第一补偿策略确定补偿值(T 5)，以对第二车轮感应信号的脉冲宽度(T 2)进行补偿(S103、S204、S304)。有益效果：以车轮传感器的计轴信号中两个脉冲出现的时间差(T 3)为基础，按照第一补偿策略确定补偿值(T 5)以对后产生的脉冲的脉冲宽度(T 2)进行补偿，避免SI脉冲上升沿和下降沿完全覆盖SII脉冲，从而防止丢轴。

Description

能够防止丢轴的计轴方法、计轴系统及计轴设备 【技术领域】
本发明涉及铁路信号技术领域，具体涉及一种能够防止丢轴的计轴方法、计轴系统及计轴设备。
【背景技术】
在铁路运输系统中，为检查轨道区段或道岔区段的列车占用状态，一般采用轨道电路方式。然而，在环境特殊的地区，由于轨道电路无法可靠地进行区段占用/空闲的检查，因此，引入了计轴技术，通过使用电磁感应式的计轴传感器，检查两个或多个检测点之间的轴数情况，判断区段内是否有车占用。
车轮跨越车轮传感器时，两个传感电路SⅠ和SⅡ分别感应形成脉冲信号。由于列车车轮先后经过车轮传感器的两个磁头，于是，两路脉冲信号必须满足有先后有重叠的特征，才被认为是有效的车轮传感器的计轴信号，如图1所示，两路脉冲信号的相位关系代表车轮的运动方向，系统以此来识别车轮运行方向。
在列出运营过程中发现车轮传感器计轴存在丢轴的现象，测量到丢轴时车轮传感器形成的波形如下图2和图3所示，形成的信号波形中SI脉冲上升沿和下降沿完全覆盖SII脉冲，不符合图1车轮传感器的计轴信号中两路脉冲信号的叠加规则，则出现丢轴情况。
鉴于此，克服以上现有技术中的缺陷，提供一种新的能够防止丢轴的计轴方法成为本领域亟待解决的技术问题。
【发明内容】
本发明的目的在于针对现有技术的上述缺陷，提供一种能够防止丢轴的计轴方法、计轴系统及计轴设备。
本发明的技术方案如下：提供一种能够防止丢轴的计轴方法，其特征 在于，所述计轴方法包括：
S1，获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
S2，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
S3，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
优选地，所述第一补偿策略为：当所述时间差小于或等于第一时间阈值时，补偿值为第一补偿时间值；当所述时间差大于第一时间阈值时，补偿值为第二补偿时间值。
优选地，所述计轴方法在步骤S2和步骤S3之间还包括：
S21，获取所述第二车轮感应信号的脉冲宽度，当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，进入步骤S3；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，不执行步骤S3。
优选地，所述计轴方法还包括：
S0，响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略。
优选地，步骤S0具体包括：
响应于所述车轮传感器运行状态变化，对车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号进行实时监测；
检测所述第一车轮感应信号的脉冲宽度和所述第二车轮感应信号的脉冲宽度，确定第一车轮感应信号和第二车轮感应信号的脉冲宽度差；
检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
对所述脉冲宽度差和所述时间差进行统计分析，根据统计分析结果确定所述第一补偿策略。
所述计轴方法还包括：S4，根据所述第一车轮感应信号和补偿后的所述第二车轮感应信号对所述车轮传感器的计轴信号进行过滤。
本发明的另一技术方案如下：提供一种能够防止丢轴的计轴系统，所述计轴系统包括：
信号采集模块，用于获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
检测计算模块，用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；以及
补偿模块，用于根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
优选地，所述计轴系统还包括：
脉冲宽度检测模块，用于获取所述第二车轮感应信号的脉冲宽度；
所述补偿模块还用于当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，对所述第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，不对所述第二车轮感应信号的脉冲宽度进行补偿。
优选地，所述计轴系统还包括：
策略制定模块，用于响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略。
本发明的另一技术方案如下：提供一种能够防止丢轴的计轴设备，所述计轴设备包括：
至少两个车轮传感器，所述车轮传感器包括两个磁头；
与所述磁头连接的感应电路，用于根据磁头的磁场变化形成轴脉冲信号；
脉冲宽度补偿电路，用于对输入信号的脉冲宽度进行补偿；
用于存储指令的存储器；
用于执行所述指令的处理器；
所述指令在所述处理器上执行时执行包括以下各个过程：
获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应 信号；
检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
根据所述时间差，按照预设的第一补偿策略确定补偿值，控制所述脉冲宽度补偿电路对所述第二车轮感应信号的脉冲宽度进行补偿。
本发明的有益效果在于：本发明的计轴方法、计轴系统及计轴设备，以车轮传感器的计轴信号中两个脉冲出现的时间差为基础，按照第一补偿策略确定的补偿值对后产生的脉冲的脉冲宽度进行补偿，减少SI脉冲上升沿和下降沿完全覆盖SII脉冲的情景，以防止丢轴。
【附图说明】
图1是本发明中车轮传感器的计轴信号形成的原理图。
图2是本发明中车轮传感器的计轴信号丢轴时的波形采集图。
图3是本发明中车轮传感器的计轴信号丢轴时的脉冲图。
图4是本发明实施例1的能够防止丢轴的计轴方法的流程图。
图5是本发明中车轮传感器的计轴信号脉冲宽度补偿的原理图。
图6是本发明实施例2的能够防止丢轴的计轴方法的流程图。
图7是本发明中车轮经过车轮传感器后倒退时形成的轴脉冲示意图。
图8是本发明实施例3的能够防止丢轴的计轴方法的流程图。
图9是本发明实施例4的能够防止丢轴的计轴系统的结构框图。
图10是本发明实施例5的能够防止丢轴的计轴系统的结构框图。
图11是本发明实施例6的能够防止丢轴的计轴系统的结构框图。
图12是本发明实施例7的能够防止丢轴的计轴设备的结构框图。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图和具体实施例对本发明作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
为了使本揭示内容的叙述更加详尽与完备，下文针对本发明的实施方式与具体实施例提出了说明性的描述；但这并非实施或运用本发明具体实 施例的唯一形式。实施方式中涵盖了多个具体实施例的特征以及用以建构与操作这些具体实施例的方法步骤与其顺序。然而，亦可利用其它具体实施例来达成相同或均等的功能与步骤顺序。
实施例1
本发明实施例1提供了一种能够防止丢轴的计轴方法，请参阅图4所示，所述计轴方法包括：
S101，获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号。
S102，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差。
S103，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
在步骤S101中，第一车轮感应信号和第二车轮感应信号均为脉冲信号，二者部分重叠。
在步骤S102中，请参阅图5所示，第一车轮感应信号和第二车轮感应信号的脉冲宽度分别为T 1和T 2，分别检测第一车轮感应信号和第二车轮感应信号出现脉冲的第一时刻t 1和第二时刻t 2，计算时间差T 3＝t 2-t 1。
在步骤S103中，将时间差T 3代入第一补偿策略中计算补偿值T 5，对第二车轮感应信号的脉冲宽度进行补偿，补偿后的脉冲宽度为T 2+T 5，避免被第一车轮感应信号完全覆盖，补偿后符合车轮传感器的计轴信号中两路脉冲信号的叠加规则，避免丢轴现象出现。
具体地，所述第一补偿策略为：当所述时间差T 3小于或等于第一时间阈值时，补偿值T 5为第一补偿时间值；当所述时间差T 3大于第一时间阈值时，补偿值T 5为第二补偿时间值。
实施例2
本发明实施例2提供了一种能够防止丢轴的计轴方法，请参阅图6所示，所述计轴方法包括：
S201，获取车轮传感器的两个传感电路的第一车轮感应信号和第二车 轮感应信号。
S202，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差。
S203，获取所述第二车轮感应信号的脉冲宽度，当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，进入步骤S204；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，结束，不执行步骤S204。
S204，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
本实施例在实施例1的基础上，请参阅图7所示，考虑到列车碾压车轮未过、列车倒退情况的出现，当上述情况出现时还对后出现的第二车轮感应信号进行脉冲宽度补偿，容易出现误判。因此，在对第二车轮感应信号进行脉冲宽度补偿之前，在步骤S203中，当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，判断列车行驶速度为正常速度，未出现列车减速、停车、倒退的情况，可以对第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，判断列车出现减速、停车、倒退的情况，不对第二车轮感应信号的脉冲宽度进行补偿。
实施例3
本发明实施例3提供了一种能够防止丢轴的计轴方法，请参阅图8所示，所述计轴方法包括：
S301，响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略。
S302，获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号。
S303，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差。
S304，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
S305，根据所述第一车轮感应信号和补偿后的所述第二车轮感应信号 对所述车轮传感器的计轴信号进行过滤。
步骤S301具体包括如下步骤：
S3011，响应于所述车轮传感器运行状态变化，对车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号进行实时监测。
S3012，检测所述第一车轮感应信号的脉冲宽度和所述第二车轮感应信号的脉冲宽度，确定第一车轮感应信号和第二车轮感应信号的脉冲宽度差。
S3013，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差。
S3014，对所述脉冲宽度差和所述时间差进行统计分析，根据统计分析结果确定所述第一补偿策略。
通过监测每一个车轮传感器的计轴信号中两个脉冲信号，计算两个脉冲信号的时间差和脉冲宽度差，对时间差和脉冲宽度差进行统计分析，申请人发现，所有车轮传感器的计轴信号中两个脉冲信号的脉冲宽度差均满足小于第一补偿时间值。
因此，确定第一补偿策略为：当所述时间差T 3小于或等于第一时间阈值时，补偿值T 5为第一补偿时间值；当所述时间差T 3大于第一时间阈值时，补偿值T 5为第二补偿时间值。
实施例4
本发明实施例4提供了一种能够防止丢轴的计轴系统，请参阅图9所示，所述计轴系统包括：信号采集模块10、检测计算模块20和补偿模块30，其中，信号采集模块10用于获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；检测计算模块20用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；补偿模块30用于根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
在本实施例中，第一车轮感应信号和第二车轮感应信号均为脉冲信号，二者部分重叠。
请参阅图5所示，第一车轮感应信号和第二车轮感应信号的脉冲宽度分别为T 1和T 2，检测计算模块20用于分别检测第一车轮感应信号和第二车轮感应信号出现脉冲的第一时刻t 1和第二时刻t 2，计算时间差T 3＝t 2-t 1。
补偿模块30用于将时间差T 3代入第一补偿策略中计算补偿值T 5，对第二车轮感应信号的脉冲宽度进行补偿，补偿后的脉冲宽度为T 2+T 5，避免被第一车轮感应信号完全覆盖，补偿后符合车轮传感器的计轴信号中两路脉冲信号的叠加规则，避免丢轴现象出现。
具体地，所述第一补偿策略为：当所述时间差T 3小于或等于第一时间阈值时，补偿值T 5为第一补偿时间值；当所述时间差T 3大于第一时间阈值时，补偿值T 5为第二补偿时间值。
实施例5
本发明实施例5提供了一种能够防止丢轴的计轴系统，请参阅图10所示，所述计轴系统包括：信号采集模块10、检测计算模块20、补偿模块30和脉冲宽度检测模块40，其中，信号采集模块10用于获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；检测计算模块20用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；脉冲宽度检测模块40用于获取所述第二车轮感应信号的脉冲宽度；补偿模块30用于当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，不对所述第二车轮感应信号的脉冲宽度进行补偿。
本实施例在实施例4的基础上，请参阅图7所示，考虑到列车碾压车轮未过、列车倒退情况的出现，当上述情况出现时还对后出现的第二车轮感应信号进行脉冲宽度补偿，容易出现误判。因此，本实施例设置了脉冲宽度检测模块40，在对第二车轮感应信号进行脉冲宽度补偿之前，获取所述第二车轮感应信号的脉冲宽度，当第二车轮感应信号的脉冲宽度小于或 等于预设宽度阈值时，判断列车行驶速度为正常速度，未出现列车减速、停车、倒退的情况，可以对第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，判断列车出现减速、停车、倒退的情况，不对第二车轮感应信号的脉冲宽度进行补偿。
实施例6
本发明实施例6提供了一种能够防止丢轴的计轴系统，请参阅图11所示，所述计轴系统包括：策略制定模块50、信号采集模块10、检测计算模块20和补偿模块30，其中，策略制定模块50用于响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略；信号采集模块10用于获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；检测计算模块20用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；补偿模块30用于根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
具体地，策略制定模块50包括：获取单元501、第一检测计算单元502和第二检测计算单元503和统计及制定单元504，其中，监测单元501用于响应于所述车轮传感器运行状态变化，通过信号采集模块10获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；第一检测计算单元502用于检测所述第一车轮感应信号的脉冲宽度和所述第二车轮感应信号的脉冲宽度，确定第一车轮感应信号和第二车轮感应信号的脉冲宽度差；第二检测计算单元503用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；统计及制定单元504用于对所述脉冲宽度差和所述时间差进行统计分析，根据统计分析结果确定所述第一补偿策略。
通过采集每一个车轮传感器的计轴信号中两个脉冲信号，计算两个脉冲信号的时间差和脉冲宽度差，对时间差和脉冲宽度差进行统计分析，申请人发现，所有车轮传感器的计轴信号中两个脉冲信号的脉冲宽度差均满 足小于第一补偿时间值。
因此，确定第一补偿策略为：当所述时间差T 3小于或等于第一时间阈值时，补偿值T 5为第一补偿时间值；当所述时间差T 3大于第一时间阈值时，补偿值T 5为第二补偿时间值。
实施例7
本发明实施例7提供了一种能够防止丢轴的计轴设备，请参阅图12所示，所述计轴设备包括：至少两个车轮传感器、感应电路、脉冲宽度补偿电路、用于存储指令的存储器、以及用于执行指令的处理器。
其中，每个车轮传感器包括两个磁头，感应电路与磁头一一对应设置，感应电路用于根据磁头的磁场变化形成轴脉冲信号。脉冲宽度补偿电路用于对输入信号的脉冲宽度进行补偿。
处理器为中央处理器，用于处理各种指令，第二处理器可以是中央处理单元(CPU)、数字信号处理器(DSP)、一个或多个处理器内核、单核处理器、双核处理器、多核处理器、微处理器、主机处理器、控制器、多个处理器或控制器、芯片、微芯片、一个或多个电路、回路、逻辑单元、集成电路(IC)、专用IC(ASIC)或任何其它合适的多用或专用处理器或控制器。
其中，所述指令在所述处理器上执行时执行包括以下各个过程：
获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
根据所述时间差，按照预设的第一补偿策略确定补偿值，控制所述脉冲宽度补偿电路对所述第二车轮感应信号的脉冲宽度进行补偿。
进一步地，所述计轴设备还包括：过滤电路，用于对所述车轮传感器的计轴信号进行过滤。
进一步地，所述指令在所述处理器上执行时还执行包括以下过程：
获取所述第二车轮感应信号的脉冲宽度；
当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，控制所述脉冲宽度补偿电路对所述第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，控制所述脉冲宽度补偿电路不对所述第二车轮感应信号的脉冲宽度进行补偿。
进一步地，所述指令在所述处理器上执行时还执行包括以下过程：
响应于所述车轮传感器运行状态变化，对车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号进行实时监测；
检测所述第一车轮感应信号的脉冲宽度和所述第二车轮感应信号的脉冲宽度，确定第一车轮感应信号和第二车轮感应信号的脉冲宽度差；
检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
对所述脉冲宽度差和所述时间差进行统计分析，根据统计分析结果确定所述第一补偿策略。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (10)

  1. 一种能够防止丢轴的计轴方法，其特征在于，所述计轴方法包括：
    S1，获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
    S2，检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
    S3，根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
  2. 根据权利要求1所述的能够防止丢轴的计轴方法，其特征在于，所述第一补偿策略为：当所述时间差小于或等于第一时间阈值时，补偿值为第一补偿时间值；当所述时间差大于第一时间阈值时，补偿值为第二补偿时间值。
  3. 根据权利要求1所述的能够防止丢轴的计轴方法，其特征在于，所述计轴方法在步骤S2和步骤S3之间还包括：
    S21，获取所述第二车轮感应信号的脉冲宽度，当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，进入步骤S3；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，不执行步骤S3。
  4. 根据权利要求1所述的能够防止丢轴的计轴方法，其特征在于，所述计轴方法还包括：
    S0，响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略。
  5. 根据权利要求4所述的能够防止丢轴的计轴方法，其特征在于，步骤S0具体包括：
    响应于所述车轮传感器运行状态变化，对车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号进行实时监测；
    检测所述第一车轮感应信号的脉冲宽度和所述第二车轮感应信号的脉冲宽度，确定第一车轮感应信号和第二车轮感应信号的脉冲宽度差；
    检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
    对所述脉冲宽度差和所述时间差进行统计分析，根据统计分析结果确定所述第一补偿策略。
  6. 根据权利要求3所述的能够防止丢轴的计轴方法，其特征在于，
    所述计轴方法还包括：S4，根据所述第一车轮感应信号和补偿后的所述第二车轮感应信号对所述车轮传感器的计轴信号进行过滤。
  7. 一种能够防止丢轴的计轴系统，其特征在于，所述计轴系统包括：
    信号采集模块，用于获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
    检测计算模块，用于检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；以及
    补偿模块，用于根据所述时间差，按照预设的第一补偿策略确定补偿值，以对所述第二车轮感应信号的脉冲宽度进行补偿。
  8. 根据权利要求7所述的能够防止丢轴的计轴系统，其特征在于，所述计轴系统还包括：
    脉冲宽度检测模块，用于获取所述第二车轮感应信号的脉冲宽度；
    所述补偿模块还用于当第二车轮感应信号的脉冲宽度小于或等于预设宽度阈值时，对所述第二车轮感应信号的脉冲宽度进行补偿；当第二车轮感应信号的脉冲宽度大于预设宽度阈值时，不对所述第二车轮感应信号的脉冲宽度进行补偿。
  9. 根据权利要求7所述的能够防止丢轴的计轴系统，其特征在于，所述计轴系统还包括：
    策略制定模块，用于响应于所述车轮传感器运行状态变化，检测并根据所述车轮传感器的运行数据确定所述第一补偿策略。
  10. 一种能够防止丢轴的计轴设备，其特征在于，所述计轴设备包括：
    至少两个车轮传感器，所述车轮传感器包括两个磁头；
    与所述磁头连接的感应电路，用于根据磁头的磁场变化形成轴脉冲信号；
    脉冲宽度补偿电路，用于对输入信号的脉冲宽度进行补偿；
    用于存储指令的存储器；
    用于执行所述指令的处理器；
    所述指令在所述处理器上执行时执行包括以下各个过程：
    获取车轮传感器的两个传感电路的第一车轮感应信号和第二车轮感应信号；
    检测所述第一车轮感应信号出现脉冲的第一时刻和所述第二车轮感应信号出现脉冲的第二时刻，确定第一时刻和第二时刻之间的时间差；
    根据所述时间差，按照预设的第一补偿策略确定补偿值，控制所述脉冲宽度补偿电路对所述第二车轮感应信号的脉冲宽度进行补偿。
PCT/CN2020/096316 2019-06-17 2020-06-16 能够防止丢轴的计轴方法、计轴系统及计轴设备 WO2020253672A1 (zh)

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