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1.发明授权公开(公告)号：US11021180B2
公开(公告)日：2021-06-01
申请号：US15947143
申请日：2018-04-06
发明人： Brian Harp , Holger Schmidt , Stefan Fritschi , Jay Yocum
摘要： A railway road crossing warning system (10) including a railway road crossing control unit (18) that may be selectively set to a primary or a secondary mode of operation is provided. In the primary mode of operation, the railway road crossing control unit is responsive to a primary activation signal (21) received from a primary activation-signal source (22), such as a positive train control (PTC) system. In the event the primary activation signal from the primary activation-signal source is not available, railway road crossing control unit (18) is set to the secondary mode of operation, where the railway road crossing control unit is responsive to one or more signals (25) received from a secondary activation-signal source (26) including a railway-vehicle sensing system (28) electrically-decoupled from a railroad track (12). Disclosed embodiments maintain operational robustness in the presence of changing weather and avoid variable electrical ballast conditions that otherwise could develop across the rails, while providing a cost-effective and reliable backup capability for a PTC-started crossing system.
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公开(公告)号：US11866076B2
公开(公告)日：2024-01-09
申请号：US16476668
申请日：2017-06-02
发明人： Holger Schmidt , Brian Harp , Brian Joseph Hogan , A. Nathan Edds
CPC分类号： B61L1/187 , B61L1/185 , B61L1/188 , B61L23/044
摘要： Aspects of the disclosed embodiments generally relate to railway track circuits, in particular track circuits with continued distance monitoring and broken rail protection.
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3.发明授权公开(公告)号：US11713066B2
公开(公告)日：2023-08-01
申请号：US16497690
申请日：2017-03-29
发明人： Brian Harp , Holger Schmidt
CPC分类号： B61L29/32 , B61L29/22 , B61L29/282 , G01V3/10
摘要： A railroad crossing control system (100) includes a constant warning time device (40) with a control unit (50) configured to produce multiple signals, and a wheel sensing system (120) comprising at least one sensor (122) connected to a rail (20a, 20b) of a railroad track (20) at a predetermined position (P), wherein the wheel sensing system (120) detects a presence of railroad vehicle travelling on the railroad track (20) such that the at least one sensor (122) detects wheels of the railroad vehicle using electromagnetic fields, wherein the wheel sensing system (120) provides speed values of the railroad vehicle to the constant warning time device (40), and wherein the constant warning time device (40) produces a constant warning time signal for controlling a railroad crossing warning device in response to receiving the speed values of the wheel sensing system (120).
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公开(公告)号：US20220315071A1
公开(公告)日：2022-10-06
申请号：US17217214
申请日：2021-03-30
发明人： Holger Schmidt , Richard Bamfield
IPC分类号： B61L1/18
摘要： A grade crossing control system includes a track circuit with a grade crossing predictor (GCP) system coupled to rails of a railroad track at a grade crossing, wherein a railroad vehicle travelling on the railroad track causes a change of impedance when entering the track circuit, and wherein the GCP system generates grade crossing activation signals in response to the change of the impedance of the track circuit, wherein, for detecting the change of impedance, the GCP system includes a first transmitter transmitting a first signal over the track circuit and a first receiver detecting a first response signal, a second transmitter transmitting a second signal over the track circuit and a second receiver detecting a second response signal, wherein the first transmitter and the first receiver are preprogrammed to a first frequency, and wherein the second transmitter and the second receiver are preprogrammed to a second frequency.
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公开(公告)号：US11938978B2
公开(公告)日：2024-03-26
申请号：US17217214
申请日：2021-03-30
发明人： Holger Schmidt , Richard Bamfield
IPC分类号： B61L1/18
CPC分类号： B61L1/181
摘要： A grade crossing control system includes a track circuit with a grade crossing predictor (GCP) system coupled to rails of a railroad track at a grade crossing, wherein a railroad vehicle travelling on the railroad track causes a change of impedance when entering the track circuit, and wherein the GCP system generates grade crossing activation signals in response to the change of the impedance of the track circuit, wherein, for detecting the change of impedance, the GCP system includes a first transmitter transmitting a first signal over the track circuit and a first receiver detecting a first response signal, a second transmitter transmitting a second signal over the track circuit and a second receiver detecting a second response signal, wherein the first transmitter and the first receiver are preprogrammed to a first frequency, and wherein the second transmitter and the second receiver are preprogrammed to a second frequency.
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公开(公告)号：US20230264726A1
公开(公告)日：2023-08-24
申请号：US18043661
申请日：2020-11-04
发明人： Hartmut Guckel , Holger Schmidt , Richard Bamfield
CPC分类号： B61L29/226 , B61L29/286
摘要： A grade crossing control system (400, 600) includes a track circuit with a grade crossing predictor (GCP) system (40), and at least one auxiliary shunting device (420, 430) connected to the rails (20a, 20b) of the railroad track (20), wherein a railroad vehicle travelling on the railroad track (20) causes a change of impedance when entering the track circuit, wherein the at least one auxiliary shunting device (420, 430) detects a presence of the railroad vehicle travelling on the railroad track (20) and generates an auxiliary change of the impedance of the track circuit, and wherein the GCP system (40) generates grade crossing activation signals in response to the change of the impedance or the auxiliary change of the impedance of the track circuit. The auxiliary shunting device is provided to improve reliability in case of poor shunting. In a first implementation the auxiliary shunting device is an additional shunt (428) between rails and within the approaching distance (AL), wherein the shunt is switched on by a separate vehicle detector (422). In a second implementation the termination shunt (SI) is switched off by a vehicle detector (422) before the approaching distance (AL).
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公开(公告)号：US20230143765A1
公开(公告)日：2023-05-11
申请号：US17453883
申请日：2021-11-08
发明人： Holger Schmidt
IPC分类号： B61L23/00
CPC分类号： B61L23/007
摘要： A railroad crossing control system includes a grade crossing predictor system or grade crossing motion system with a combined crossing termination shunt, the combined crossing termination shunt including a housing, a first printed circuit board (PCB) comprising first circuitry and first rail terminals, a second printed circuit board (PCB) comprising second circuitry and second rail terminals, wherein the first PCB and the second PCB are positioned inside the housing, and wherein the first circuitry and the second circuitry are configured for a same frequency.
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公开(公告)号：US11420659B2
公开(公告)日：2022-08-23
申请号：US16343588
申请日：2016-11-15
发明人： Brian Harp , Holger Schmidt
摘要： A traffic control system (100) includes a railroad crossing control system (10) with a constant warning time device (40), a wheel sensing system (120) with a sensor (122) connected to a rail (20a, 20b) of a railroad track (20) at a predetermined position (P), and a communication network (140) interfacing with the railroad crossing control system (10) and the wheel sensing system (120) and adapted to transmit data. The wheel sensing system (120) provides speed values of a rail vehicle travelling on the railroad track (20), wherein the speed values are transmitted to the railroad crossing control system (10) via the communication network (140) for producing a preemption signal for the traffic signal control system (110). Further, a method for providing a preemption signal for a traffic signal control system (110) is described.
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公开(公告)号：US20210139059A1
公开(公告)日：2021-05-13
申请号：US16476668
申请日：2017-06-02
摘要： Aspects of the disclosed embodiments generally relate to railway track circuits, in particular track circuits with continued distance monitoring and broken rail protection.
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10.发明申请公开(公告)号：US20200017134A1
公开(公告)日：2020-01-16
申请号：US16497690
申请日：2017-03-29
发明人： Brian Harp , Holger Schmidt
摘要： A railroad crossing control system (100) includes a constant warning time device (40) with a control unit (50) configured to produce multiple signals, and a wheel sensing system (120) comprising at least one sensor (122) connected to a rail (20a, 20b) of a railroad track (20) at a predetermined position (P), wherein the wheel sensing system (120) detects a presence of railroad vehicle travelling on the railroad track (20) such that the at least one sensor (122) detects wheels of the railroad vehicle using electromagnetic fields, wherein the wheel sensing system (120) provides speed values of the railroad vehicle to the constant warning time device (40), and wherein the constant warning time device (40) produces a constant warning time signal for controlling a railroad crossing warning device in response to receiving the speed values of the wheel sensing system (120).
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