Railroad health monitoring device, and related methods of use

Abstract

A rail health monitoring device has: a housing; a magnetic rail connector; a rail characteristic sensor; a long- range radio wave transceiver configured to receive and transmit data to a remote server; and a controller configured to encode and compress raw data, which comprises timestamped signals from the rail characteristic sensor, into output data packets and to transmit the output data packets at predetermined intervals to the remote server via the long-range radio wave transceiver.

Description

RAILROAD HEALTH MONITORING DEVICE, AND RELATED METHODS OF USETECHNICAL FIELD

[0001] This document relates to railroad health monitoring devices and related methods of use.BACKGROUND

[0002] The following paragraphs are not an admission that anything discussed in them is prior art or part of the knowledge of persons skilled in the art.

[0003] Derailment mitigation devices using temperature disclosed in U.S. patent publication no.2024 / 0425091 are magnetically fixed on the side of a railroad track to measure deflection and temperature. Hot boxes or hot bearing detectors (HBD) are also used to measure the temperature of the journal bearings of a train, from which rail temperature is commonly inferred.SUMMARY

[0004] A rail health monitoring device is disclosed comprising: a housing; a magnetic rail connector; a rail characteristic sensor; a long-range radio wave transceiver configured to receive from and transmit data to a remote server; and a controller configured to encode and compress raw data, which comprises timestamped signals from the rail characteristic sensor, into output data packets and to transmit the output data packets at predetermined intervals to the remote server via the long-range radio wave transceiver.

[0005] A method is disclosed comprising: monitoring a characteristic of a rail of a railroad, using one or more sensors enclosed within a housing that is magnetically mounted to a side of the rail; encoding and compressing raw data, which comprises timestamped signals from the one or more sensors, into output data packets, using a controller; and transmitting the output data packets at predetermined intervals to a remote server.

[0006] A rail health monitoring apparatus is disclosed comprising: a housing attached to the rail, the housing containing a sensor system, a communications system, and a power source.

[0007] A method is disclosed of monitoring rail track parameters or characteristics consisting of the following steps: measuring the rail characteristic with a rail characteristic sensor and encoding the measured and computed data and transmitting it through long range radio wave communication apparatus; receiving and decoding the data at a remote location; enabling the data to be displayed on a laptop computer or other display device.

[0008] A method is disclosed of measuring the acceleration of the rail in three axes as a train passes over the rail and encoding the measured and computed data and transmitting it through long range radio wave communication apparatus; receiving and decoding the data at a remote location; and enabling the data to be displayed on a laptop computer or other display device.

[0009] The disclosed rail health monitoring devices include embodiments designed to overcome the limitations of current methods by providing a comprehensive, accurate, and scalable solution for railtemperature measurement and rail health metrics. Various of these embodiments may have one or more of the following benefits discussed below.

[0010] Rapid Deployment: The rail health monitoring device can be quickly installed on rail tracks without interrupting railroad operations and without requiring specialized knowledge or tools. The magnetic mounting mechanism allows for easy installation and removal, minimizing operational disruptions and enabling immediate temperature monitoring.

[0011] Relocatable: The rail health monitoring device can be easily redeployed to different locations, allowing operators to identify and monitor trouble spots more effectively. This flexibility is crucial for adaptive monitoring and addressing specific areas of concern on the rail network.

[0012] Self-contained and Independent: Powered by a long-lasting lithium-thionyl chloride battery, the rail health monitoring device operates independently and communicates data directly to the cloud via satellite and cellular networks without the need for gateway devices. This ensures continuous and reliable data collection even in remote or hard-to-reach areas, eliminating the need for external power sources or solar panels.

[0013] Dual Redundant Sensors: The use of dual redundant temperature sensors ensures high accuracy and reliability of temperature measurements, reducing the risk of errors and providing confidence in the data collected. The sensors offer precise readings with a resolution of 0.25 degrees Celsius and accuracy of + / -0.5 degrees Celsius.

[0014] Predictive Analysis: By integrating real-time data with predictive models, the Rail health monitoring device may enable proactive maintenance and reduces the risk of track failures. This feature enhances the overall safety and efficiency of rail network operations by allowing for timely interventions and preventive measures.

[0015] Environmental Resilience: Designed to withstand harsh environmental conditions, the Rail health monitoring device may be IP65 (Ingress Protection 65) rated for waterproof and dust-tight protection. It operates effectively in extreme temperatures ranging from -40°C to +85°C, as well as in conditions involving rain, snow, and ice. This robustness ensures reliable performance in diverse and challenging environments.

[0016] Robustness and Minimal Maintenance: Built to be robust and durable, the Rail health monitoring device can withstand the rigors of the rail environment, including extreme temperatures, vibration, and rough handling. It requires minimal maintenance, ensuring long-term reliable operation and reducing maintenance costs.

[0017] Real-time Data and Alerts: The data received by the remote computing device / remote server via the long range radio wave transceiver may provide real-time temperature data and automated alerts, allowing for timely interventions and reducing unnecessary disruptions. The data is integrated into a cohesive monitoring system accessible via a web-based GIS dashboard, PC, or mobile applications. This integration facilitates effective decision-making and operational efficiency.

[0018] Enhanced Data Security and Accessibility: The Rail health monitoring device may employ advanced encryption algorithms to ensure the confidentiality and integrity of the data. Secure access iscontrolled through login credentials and user management. Data can also be exported in various formats, such as CSV (Comma Separated Values) and JSON (JavaScript Object Notation), for further analysis and integration with other systems.

[0019] Advanced Communication Capabilities: Supporting both satellite and cellular communication technologies, the Rail health monitoring device ensures reliable data transmission in a variety of environments, including remote areas where traditional cellular coverage may be limited. This dual communication capability enhances the device's versatility and reliability.

[0020] Near Field Communication (NFC): The device includes NFC technology for easy device management, data access, and activation. This feature simplifies interactions with the device, particularly in field-deploy able applications, and provides an additional layer of convenience and usability.

[0021] By addressing these critical issues, the rail health monitoring device enhances the ability of railroad operators to monitor and maintain track geometry, thereby improving safety, reducing operational costs, and enhancing the overall efficiency of rail networks.

[0022] In various embodiments, there may be included any one or more of the following features:The long-range radio wave transceiver is configured to transmit the output data directly to and receive data directly from, a satellite. The long-range radio wave transceiver comprises a low-earth-orbit satellite transceiver. The long-range radio wave transceiver is further configured to receive and the controller is configured to implement one or more of: configuration parameters for adjusting sensing intervals or transmission schedules; and diagnostic queries and responses. The rail characteristic sensor comprises an orientation sensor. The rail characteristic sensor comprises a vibration sensor. The rail characteristic sensor comprises a sensor configured to measure one or more of orientation and vibration. The sensor comprises an accelerometer. The raw data sent to the controller comprises signals, from the sensor, that include information on one or more of tilt, velocity, acceleration, displacement, and vibration modes, of the rail. The accelerometer comprises a triaxial accelerometer configured to provide data that includes both: (i) static orientation data of the rail; and (ii) dynamic vibration data of the rail under traffic. A global navigation satellite system (GNSS) positioning module, and the raw data comprises signals, from the global positioning module, that include information on device location and timestamp. The controller is configured to adjust a transmission schedule of predetermined intervals based on risk level. The controller is configured to change the predetermined intervals of transmission when one or more signals included in the raw data change between risk ranges. The controller is configured to reduce the predetermined intervals of transmission when one or more signals included in the raw data change from a lower risk range to a higher risk range. The rail characteristic sensor comprises a rail temperature sensor. The rail temperature sensor is configured to be in thermal communication with a rail when the rail health monitoring device is mounted to the rail. The rail temperature sensor is thermally isolated from the rest of the rail health monitoring device. The rail temperature sensor is located in a thermal well defined by an external surface of the housing. The thermal well comprises a thermally conductive liner encircled by a thermally insulative liner. The rail temperature sensor is configured to bias against the rail when the rail health monitoring device is mounted to the rail. An internal battery. The device is configured to be self-powered independent of any external power source. A supercapacitor that is: configured to charge over time via theinternal battery; and provide power to the long-range radio wave transceiver. The controller is configured for low power operation by: entering a sleep mode in between data collection and transmission; and following a sampling and transmission schedule of predetermined intervals. The magnetic rail connector is configured to couple to a web of a rail in use. A top face of the housing is sloped out of horizontal to direct ice, snow, and rain off of the top face. A satellite antenna embedded within the housing; and in which the housing is configured to be radio frequency transparent. The housing comprises a pressure equalizing vent impermeable to liquid and solid transfer. Two or more rail temperature sensors. A rail health monitoring system comprising the rail health monitoring device deployed on a rail of a railroad. The remote server, which is connected to: receive and decode the output data packets; transmit configuration parameters, and diagnostic queries; and store information from the output data packets in a database. Reversibly installing the housing on the side of the rail. Monitoring comprises sampling the one or more sensors according to a predetermined schedule. The one or more sensors comprise a rail temperature sensor. Buffering the raw data in a non-volatile memory. Decoding and decompressing the output data packets. Storing information from the output data packets on a remote database. Operating the controller on a power management cycle where one or both the controller and a long range radio wave transceiver are cycled between: a sleep mode in between data readings and transmissions; and a wake mode during data readings and transmissions.

[0023] The foregoing summary is not intended to summarize each potential embodiment or every aspect of the subject matter of the present disclosure. These and other aspects of the device and method are set out in the claims.BRIEF DESCRIPTION OF THE FIGURES

[0024] Embodiments will now be described with reference to the figures, in which like reference characters denote like elements, by way of example, and in which: Fig. 1 is an end elevation view of a rail health monitoring device with a housing, magnetic rail connector and rail characteristic sensor, installed on a rail. Fig. 2 is a front-side view of the rail health monitoring device of Fig. 1. Fig. 3 is a front-side perspective view of the rail health monitoring device of Fig. 1, with the rail health monitoring device illustrated separately from the rail. Fig. 4 is a rear-side perspective view of the rail health monitoring device of Fig. 3. Fig. 5 is an exploded view of the rail health monitoring device of Fig. 3. Fig. 6 is a section view taken along the 6-6 section lines of Fig. 2, of the connection between the housing and magnetic rail connector of the rail health monitoring device. Fig. 7 is a section view taken along the 7-7 section lines of Fig. 2, of the connection between the housing and magnetic rail connector of the rail health monitoring device, without the rail illustrated. Fig. 8 is a close-up section view taken along the 8-8 section lines of Fig. 2, of a magnet of the magnetic rail connector, with the rail not shown. Fig. 9 is a top view of the rail health monitoring device of Fig. 1, with the housing removed from the rail health monitoring device for illustrative purposes. Fig. 10 is a schematic view of a rail health monitoring system, incorporating a plurality of rail health monitoring devices deployed on a railroad in communication with a remote server via a satellite system, and configured to serve data to a plurality of mobile devices. Fig. 11 is a front-side perspective view of the rail health monitoring device of Fig. 3, with the housing removed for illustrative purposes, and illustrated separately from the rail. Fig. 12 is a front-side perspectiveview of the rail health monitoring device of Fig. 11, with a battery of the rail health monitoring device removed for illustrative purposes. Fig. 13 is a perspective view of the base of the rail health monitoring device of Fig.12. Fig. 14 is a front-side perspective view of an upper portion of the rail health monitoring device of Fig. 12, with the housing and an antenna mount of the rail health monitoring device removed for illustrative purposes. Fig. 15 is an end perspective view of the rail health monitoring device of Fig. 11. Fig. 16 is a top view of the rail health monitoring device of Fig. 11. Fig. 17 is a first end elevation view of the rail health monitoring device of Fig. 11. Fig. 18 is a second end elevation view of the rail health monitoring device of Fig. 11. Fig. 19 is a front-side view of the rail health monitoring device of Fig. 11. Fig. 20 is a bottom view of the rail health monitoring device of Fig. 11. Fig. 21 is a section view taken along the 21-21 section lines of Fig. 2, with the rail not shown. Fig. 22 is a section view taken along the 22-22 section lines of Fig. 2, with the rail not shown. Fig. 23 is a rear-side view of the rail health monitoring device of Fig. 3, with a mount that forms the magnetic rail connector removed. Fig. 24 is a front-side view of the rail health monitoring device of Fig. 3, with the housing removed and a PCBA (Printed Circuit Board Assembly) of the rail health monitoring device exposed. Fig. 25 is a perspective view of a rail temperature sensor with a flexible fan part and a rigid PCB (Printed Circuit Board) part. Fig. 26 is a perspective view of the rail temperature sensor of Fig. 25 installed in the PCBA of Fig. 24. Fig. 27 is a top view of the rail temperature sensor and PCBA of Fig. 26. Fig. 28 is a chart of representative data obtained from the rail health monitoring device. Fig. 29 is a screenshot from a mobile application depicting a graphical representation of representative data obtained from the rail health monitoring device. Fig. 30 is a screenshot from a mobile application depicting the location of the selected rail health monitoring device. Fig. 31 is a screenshot of an email sent from a remote server containing raw data received from the rail health monitoring device.DETAILED DESCRIPTION

[0025] Immaterial modifications may be made to the embodiments described here without departing from what is covered by the claims.

[0026] Railroad operators face significant challenges in maintaining the safety and efficiency of rail networks due to gaps in track geometry knowledge, particularly related to rail temperature and the difference between actual rail temperature and rail neutral temperature. Accurate rail temperature measurement is beneficial for tracking and sometimes preventing track-related failures, yet current methods are often inaccurate, labor-intensive, and lack scalability. These limitations lead to increased operational costs, disruptions, and potential safety hazards.

[0027] Monitoring rail temperature is important for railroad operators due to the significant impact of temperature fluctuations on rail safety and infrastructure integrity. Rail temperature fluctuations may cause a variety of problems. Thermal expansion and contraction of the rail may lead to rail buckling or rail fractures. High rail temperatures may cause rail expansion, which may lead to rail buckling. Buckled rails pose severe derailment risks, especially on Continuous Welded Rail (CWR) tracks without expansion joints. Low rail temperatures may lead to rail contraction, which may increase tensile stresses that can cause rail fractures, posing major safety hazards. An important aspect of rail temperature management is the ability to maintain thecorrect Stress-Free Temperature (SFT) or temperature range. Ensuring the rail remains at its neutral temperature range may minimize excessive tensile or compressive stresses that can lead to rail buckling or fractures. Temperature changes can induce longitudinal forces in rails, which necessitates monitoring of the rail to prevent track misalignment and maintain structural integrity. Monitoring rail temperature thus helps prevent derailments by enabling timely interventions when temperatures reach critical levels. Temperature variations can disrupt rail operations and accurate monitoring allows for preventive measures to be put into place, which can reduce service interruptions. Continuous rail temperature monitoring can thus play a key role in maintenance planning and cost reduction. Monitoring rail temperature may also enable predictive maintenance by identifying potential issues early, which not only cuts costs but also enhances the allocation of maintenance resources. Precise temperature data may allow for more accurate speed restrictions to trains, which may help maintain safety. Variations in temperature can also help to detect structural flaws, allowing for early maintenance interventions to preserve track integrity. Variations in temperature can also improve the understanding of how environmental factors can impact rail temperature, aiding in the development of more resilient rail infrastructure.

[0028] There are several methods currently employed to measure rail temperature, each with its own advantages and limitations. Hot box way side temperature monitoring systems in railroads detect overheated wheel bearings ("hot boxes") on passing trains to prevent equipment failure and derailments. These systems use infrared sensors mounted along the tracks to continuously scan axle temperatures and alert operators to dangerous heat levels in real time. One common variation of the foregoing is referred to as the Hot Box Air Temperature Adjustment, where an operator estimates rail temperature by adding 15°C to the ambient air temperature measured at hot box detectors. This method is inherently inaccurate as it does not reflect the true thermal conditions of the rail. The measurements taken within hot box detectors are also heavily influenced by external environmental factors such as solar radiation, shade, wind, and rain, often resulting in significant estimation errors. Manual temperature measurement techniques are also widely used. Handheld infrared thermometers allow for spot checks of rail surface temperature and are appreciated for their ease of use. However, the accuracy of handheld infrared thermometers depends on rail surface conditions and the device’s calibration, as these devices rely on emissivity. Moreover, the manual operation of the handheld infrared thermometers restricts how frequently and consistently they can be used. Similarly, manually deployed and read contact gauges require direct placement and reading, which can introduce delays and human error, limiting their efficiency. Another approach to measure rail temperature involves the use of fixed temperature sensors such as thermocouples and Resistance Temperature Detectors (RTDs). Fixed temperature sensors may be mounted directly on different parts of the rail, such as the head, web, or foot, to provide continuous or periodically read temperature data. While these sensors offer a high level of accuracy, they demand proper installation and regular maintenance to remain effective, which can limit their practicality for large-scale implementation. Dial gauges also fall into this category, though they can be attached directly to the rail, they are prone to maintenance issues, require careful calibration, and rely on manual interpretation and record keeping.

[0029] Remote sensing technologies may provide more advanced, non-contact options. Infrared cameras, which can be mounted on trains, drones, or trackside structures, capture thermal images of the rail across long distances. Infrared cameras are useful for identifying broader temperature profiles, but their performance can be compromised by environmental contaminants like dirt, debris, and adverse weather. In addition, Internet of Things (loT) devices have become increasingly popular and may include autonomous sensors. These autonomous sensors, often solar-powered, continuously collect and transmit temperature data short distances via cellular networks. Although the autonomous sensors provide valuable real-time monitoring, they come with a high initial setup cost and require consistent maintenance of off -rail components such as batteries, solar panels, and communication gateways. Trackside weather stations represent another method for estimating rail temperatures. These stations measure ambient conditions and use predictive models to estimate the temperature of the rail. While useful for understanding broader environmental impacts, this method lacks precision and cannot accurately account for localized rail temperature variations. Advanced monitoring systems like Fiber Optic Distributed Temperature Sensing (DTS) offer high-resolution, continuous temperature monitoring over extended distances using fiber optic cables laid along the rail. The fiber optic DTS system is highly effective in detecting localized anomalies and provides detailed data, but it involves substantial installation effort and cost, making it impractical for widespread use across entire rail networks. Any system that incorporates a dependency on cellular networks or remote receiving stations for transmission to satellite or other remote communications are inherently limited in deploy ability in remote areas.

[0030] Implementing an effective rail characteristic monitoring system involves addressing several key challenges and considerations. One aspect is the integration of real-time data and alerts into operational decision-making processes. Automated alerts and dashboard systems enable railway operators to respond quickly and precisely to temperature-related issues, reducing unnecessary disruptions and enhancing overall safety and efficiency. Accuracy and calibration of the rail temperature sensors are important to overall temperature monitoring system. For temperature readings to be reliable, sensors must be correctly installed and regularly maintained. Environmental factors such as dust, oil, solar exposure, and physical damage can affect sensor performance, making periodic calibration vital to ensure continued accuracy. Data integration is another consideration with. With multiple types of sensors and monitoring technologies often in use, combining their outputs into a unified system is necessary for coherent analysis and effective decision-making. Real-time data integration is especially valuable for timely response and predictive analytics.

[0031] To ensure effective and reliable rail temperature monitoring, devices must be engineered for high durability and low maintenance in the harsh operating conditions characteristic of railway environments. This includes resistance to extreme ambient temperatures (ranging from -40°C to +56°C), direct sunlight, moisture, vibration, dust, oil contamination, and mechanical shocks from rail operations. Sensor accuracy depends on proper calibration and installation, both of which can be influenced by environmental and operational factors. Furthermore, battery-powered monitoring units must be designed for energy efficiency, as frequent data transmission and continuous sensing can rapidly deplete power reserves. Extended battery life is essential for autonomous deployment, particularly in remote areas where regular maintenance is impractical.

[0032] Deployment challenges also arise from the physical and logistical aspects of installing fixed monitoring systems. Variations in rail profiles and the unique topography of each site necessitate tailored installation procedures, which may require specialized tools and skilled labor. Reliable network connectivity — via cellular, radio, or other communication channels — is critical for real-time data transmission and system responsiveness yet can be difficult to establish in remote or isolated regions. Integrating sensor data into a unified platform with automated alerts and dashboards enables real-time operational decision-making and targeted intervention. Therefore, environmental resilience, network reliability, and data integration capabilities are all fundamental to the successful implementation of a comprehensive railroad temperature monitoring solution.

[0033] Referring to Figs. 1-24, a rail health monitoring device 10 is illustrated, comprising a housing12, a magnetic rail connector (such as mount 46), a rail characteristic sensor such as a temperature sensor 70, a radio wave transceiver 154, and a controller 108. The housing 12 may enclose the components within a protective shroud that is resistant to weather extremes and environmental contaminants. The magnetic rail connector may reversibly and durably connect the device 10 to a rail 198 of a railroad in use. A rail characteristic sensor in a railroad monitoring context is a device used to detect and measure one or more of various physical and mechanical properties of the rail, such as temperature, strain, vibration, rail orientation, profile, wear, alignment, and surface defects. The temperature sensor 70 may comprise a rail temperature sensor that is configured and oriented to sense a temperature of the rail 198. Referring to Fig. 10, the transceiver 154 may comprise a long-range radio wave transceiver configured to receive from and transmit data to a remote server 224. Referring to Figs. 1-24, transceiver 154 may facilitate satellite communications via the satellite antenna 126 and ability to send and receive data to and from the cloud 232. The controller 108, may be a microcontroller, and may be configured to encode and compress raw data. The raw data may comprise timestamped signals from the rail temperature sensor 70, and any other onboard sensors. Raw data may be processed into output data packets that are transmitted at predetermined intervals to the remote server 224 via the long-range radio wave transceiver 154. The rail health monitoring device 10 may be deployed in use on a rail 198 of a railroad, such as on a rail web 202 of the rail 198.

[0034] Referring to Figs. 1 and 2, a railroad structure comprises a pair of rails 198 configured to support and guide rail vehicles along a track. The rail 198 includes an upper portion known as the rail head 200, which provides the primary contact surface for train wheels and is designed to withstand high mechanical loads and wear. Extending downward from the rail head 200 is the rail web 202, a vertical section that connects the rail head 200 to the rail foot 208 and provides structural support, distributing stresses between the head and the foot. The rail web 202 may include a primary radius 204 at the junction with the rail head 200 to reduce stress concentrations, as well as a secondary radius 206 near the connection to the rail foot 208 to enhance durability and reduce fatigue. The mount 46 may incorporate two further radii top and bottom to ensure that the device 10 can be mounted to rail 198 as small as 95 lb. (standard rail size). The device side of the mount 46 may be hollow and contains the electronics printed circuit board assembly (PCBA 98) and permits the electronics to be potted to further improve the environmental protection of the electronics. The rail foot 208 forms the base of the rail 198 and serves to stabilize and secure the rail to the underlying track structure, such as sleepers or ties,typically through fastening systems. This combination of geometrical features ensures the rail 198 maintains mechanical integrity and reliable performance under dynamic loading conditions characteristic of railroad operations.

[0035] Referring to Figs. 1-5, the rail health monitoring device 10 has its internal parts enclosed within a protective housing 12 designed to withstand the environmental and mechanical stresses typical of railway installations. The housing 12 may comprise a sloped roof 14 that facilitates water / oil runoff and prevents accumulation of debris, thereby enhancing weather resistance. The upper surface of the roof 14 of the cover 24 may be sloped, which has proven to aid the shedding of water, snow and ice. Shedding of water, snow and ice helps ensure that radiated emissions from the satellite antenna 126 are not dampened by the presence of liquid water, similarly for signals received by both satellite and GPS antennas, 126 and 174, respectively. Snow and ice are very effectively shed during daylight hours from solar heating and the purposefully smooth and coated cover. The protective coating has also been selected to resist Ultraviolet (UV) ageing. A sturdy base 16 may provide structural stability and support the internal components of the device. The housing 12 may includes side 18, front 20, and rear 22 panels that collectively form an enclosed chamber that shields internal electronics from physical impact, dust, and moisture. The design and orientation of these components collectively ensure environmental resilience, mechanical protection, and serviceability of the monitoring device in demanding rail environments.

[0036] Referring to Figs. 1, 5, 6, and 7 the housing 12 may be formed of a mount 46 and a removable cover 24 that may be secured together and reversibly separated to allow authorized access for maintenance or calibration while maintaining a sealed environment during operation. The cover 24 in the example shown includes the roof 14, base 16, sides 18 and front 20, and the mount 46 forms the rear 22. The cover 24 may define an open end 26 configured to define the interior in which the substantial bulk of internal components reside within when the housing 12 is assembled. The mount 46 may define a peripheral edge 28 that defines a mount cavity 27, for example structured to mount various parts of the internal components of device 10 as described further below. The combination of mount 46 and cover 24 may provide for a means not only to enclose the electronics, battery 184 and antennas 126 and 174 but to space the antennas 126 and 174 away from the head of the rail 198 and provide a clear sky view of antennas 126 and 174 to satellites 222.

[0037] Referring to Figs. 1, 5, 6, and 7 the cover 24 may be attached to the mount 46 by a suitable mechanism, such as via corresponding lips. In the example shown, an internal lip 52 on an upper edge of a peripheral shelf 50 of the mount 46 may be structured to be engaged, for example in a friction fit or latching configuration, by a corresponding catch well 32 in an overhang 30 of the cover 24. The lip 52 and catch well 32 may form peripheral structures that encircle the respective openings defined by the mount 46 and cover 24 or may be provided in a series of clips spaced about such peripheries. A latch or clip embodiment may eliminate a need for screws in the vicinity of the GPS and satellite antennas, 174 and 126 respectively (metal screws have been proven through testing to lead to antenna degraded communications performance). The cover 24 and mount 46 may be sealed together, for example the lip “catch” or “well” (catch well 32) feature may works in conjunction with a circumferential O-ring 34 seal, in a corresponding groove or grooves 36, between the cover 24 and mount 46 to seal the unit from water and dirt transfer. The cover 24 may be angled relative to the uppermount lip 52 and then swung down to fit to the mount 46. The lip 52 may be designed to prevent the top / roof 14 of the cover 24 moving away from the mount 46 by the forces from O-ring 34 or device 10 removal from the rail 198. The specific geometry of the lip 52 and catch “well” 32 in the cover 24 have been designed to provide clearance during the cover 24 transition from being angled and then seated. Referring to Fig. 16, the mount retaining lip 52 width and depth are illustrated. The relative spacing of the antennas 126 and 174 from the base mount ensures that interference of aluminum, if the base mount is manufactured from aluminum to the radiation pattern of the antennas 126 and 174 is minimised.

[0038] Referring to Fig. 7, the cover 24 may be retained, and the O-ring 34 compressed by one or more fasteners, such as a pair of screws 42. Screws 42 may be located at suitable points, such as either side of the cover 24 in recessed pockets or sockets 40. These sockets 40, which may be defined by respective bosses 44, may help in part to retain and guide the socket head cap screws 42 and also protect the heads from dirt and damage when the device 10 is in operation. Sockets 40 may be accessible from the exterior of the housing 12 via comer recesses 38 in the cover 24. In this view of the front 20 face of the cover 24, the cover 24 to mount screws 42 may be clearly seen bottom left and right, the pressure relief lower vent 90 mid centerline. The sides 18 of the cover 24 were purposefully inclined at an angle (5 degrees) along with an inclination of the front 20 face and the debossed logo and device name, to clearly indicate the correct orientation of the device 10 (so that it is not inadvertently placed upside down).

[0039] Referring to Figs. 1, 4, 5, 7, and 8, a rail health monitoring device 10 may include a suitable magnetic rail mount 46. Mount 46 may be specifically configured to couple to the web 202 of a rail 198 in use, enabling secure, reversible installation without requiring permanent modification to the rail structure. The device 10 may be configured to sit, in use, below a horizontal plane defined in use by an underside of a rail head 200 of the rail 198, to avoid interfering with the axle or wheel structure of an overpassing train. The mount 46 may define a rail-contacting surface such as rear 22 that is contoured to engage the rail web 202, for example with a curved profile in partial or full conformance a corresponding exterior profile of the web 202 of the rail 198. In other cases, the rail-contacting surface may be planar. The rear 22 face of the mount 46 may be curved with a radius (14”) that meets the curve of standard rail 198 profiles and helps ensure that the magnets 54 are in close proximity to the rail 198 for strength of attachment. The magnetic mounting of the device 10 to the rail limits the time and eliminates the need for permits required for permanent installation. The size and strength of the magnets 54 used in the embodiment shown has been determined from trials. Prior embodiments with smaller magnets 54 showed that with vibrations found in rail operation that the device 10 would slip down the web 202 of the rail 198 and may become detached.

[0040] Referring to Figs. 1, 4, 5, 7, and 8, mount 46 may incorporate one or more, such as four rare earth magnets 54, embedded in steel cups 56. Rare earth magnets are strong permanent magnets made from alloys of rare earth elements, such as neodymium or samarium-cobalt, known for their exceptionally high magnetic strength and resistance to demagnetization. They are widely used in applications requiring compact, powerful magnets, including sensors, motors, and electronic devices. These magnets 54 permit the device 10 to be attached to and retained on the rail web 202 between rail head 200 and rail foot 208. One or more magnets 54, preferably a high-strength rare earth magnet, may be housed within respective magnet cups 56 positioned inrespective cup recesses 68 in the rail-contacting surface / rear 22. The steel cups 56 concentrate the magnetic field and limit stray magnetic fields rearwards that may impact electronics performance. The magnets 54 are solely retained in the cups 56 by their magnetic force. Each magnet cup 56 may be secured within the housing 12 using a cup retaining fastener 60 that includes a head 61 and shaft 63, and that upon advancement draws a retaining spacer 62 against cup 56 ensuring stable placement. Each spacer 62 may be supported by a tapered bore 58 in cup 56. Each shaft 63 may be received by a threaded bore 66 that guide installation of the fastener and reinforce structural stability. An optional adhesive 64 (Fig. 7) may be applied to enhance holding force in high-vibration environments. In the example shown, each magnet 54 is formed of a flat ring that magnetically secures to the cup 56 and whose external surfaces are exposed for direct contact with the rail web 202 in use. Each cup 56 may have suitable properties, for example, the steel cups 56 may be nickel plated for environmental protection and are mounted in pockets / recesses 68 in the rear 22 (rail side) face of the mount 46. The mount 46 may be manufactured from aluminum and anodized for environmental protection (corrosion prevention) as well as to withstand the rough railroad environment. These cups 56 may be held in place with screws / fasteners 60 and spacers 62 or adhesives 64. The mount 46 may also be manufactured from 3D Additive Manufacturing (AM) plastic or cast Urethane, or using other suitable materials. The disclosed configuration allows the rail temperature sensor to be biased directly against the rail 198 when mounted, ensuring accurate thermal contact, with the resilience of the potting compound providing the biasing function. The overall assembly may permit reliable, tool-free attachment of the monitoring device 10 to the side of the rail while maintaining consistent sensor pressure and alignment for accurate, real-time temperature measurement.

[0041] Referring to Figs. 1, 4, 5, 7, and 8, the mount 46 may be structured to facilitate reversible separation of the mount 46 from the rail 198, for example the mount 46 may incorporates a slot 48 sized to fit a head of a flathead screwdriver to facilitate manual alignment or removal. The mount 46 may incorporate two features (slots 48) on the left and right sides 18 for insertion of flat blade screwdrivers to help break the magnetic contact of the device 10 with the rail 198. This can be accomplished with a blade insert and twist.

[0042] Referring still to Figs. 4 and 21, accurate measurement of rail temperature may be important for effective rail condition monitoring, particularly in applications such as track buckling prevention and maintenance scheduling. To achieve reliable data, the temperature sensor may need to be placed in direct physical contact with the rail surface, rather than positioned near the rail or exposed to ambient air. Sensors placed in proximity to, but not in contact with, the rail are susceptible to fluctuations in ambient temperature, solar radiation, wind, and other environmental variables that can result in significant deviations from the actual rail temperature. Direct contact ensures thermal conduction between the sensor and the rail material, providing real-time readings that reflect the true thermal state of the rail. This method minimizes latency, improves accuracy, and ensures that critical thresholds are correctly detected, which is vital for ensuring track safety and the timely implementation of operational responses.

[0043] Referring still to Figs. 4 and 21, the one or more sensors of the device 10 may comprise a rail temperature sensor 70. The rail temperature sensor 70 may be positioned within a dedicated temperature sensor recess 76 that may be formed in an external portion of the device housing 12, for example in the rear 22 of themount 46. The recess 76 may optionally be lined with thermal well, such as a brass thermal well 72, which may serve as a thermally conductive interface to facilitate efficient heat transfer from the rail to the sensor. A thermal well may be a structure designed to house a temperature sensor in such a way that it facilitates accurate measurement of the temperature of an adjacent medium — such as a solid surface, liquid, or gas — while providing protection and mechanical stability to the sensor. In general, a thermal well serves as an interface between the environment being measured and the sensing element, optimizing thermal conduction to the sensor while optionally providing thermal isolation from surrounding components. Fig. 21 clearly shows the potting of the thermal well 72 (cartridge brass to minimize corrosion and maintain excellent thermal conductivity between rail 198 and potted temperature sensor 70.) The thermal well 72 may incorporate a relief cut to aid in its retention within the urethane or silicone potting horizontally.

[0044] Referring to Figs. 4 and 21, the thermal well may have suitable features. In the context of a rail health monitoring device, a thermal well may comprise a thermally conductive enclosure or sleeve, such as one made from brass, copper, or aluminum, into which the temperature sensor is inserted. To enhance thermal communication between the rail temperature sensor 70 and the thermal well 72, a thermally conductive potting compound 80 may be disposed within the recess 76. This compound may be selected from thermally conductive epoxies, silicones, or urethanes, that provide both mechanical stability and efficient thermal transfer. The thermal well 72 provides thermal mass to even out potential short temperature fluctuations. This provides a level of thermal isolation between the mount 46 and the temperature sensor 70. This outer compound may serve to protect the internal sensor assembly from moisture, dust, vibration, and thermal cycling, while contributing to mechanical integrity. In some embodiments, alternative sealing or encapsulation methods — such as gaskets, elastomeric overmolding, or mechanical retention features — may be utilized instead of or in combination with potting compounds. The rail side of the thermal well 72 stands proud of the mount rear 22 face so that it under all normal circumstances makes contact with the rail 198 and is pressed up against the rail 198 via the forces applied in the magnetic attachment of the device 10 to the rail 198. The soft mount permits a measure of flex but always a positive force to ensure contact.

[0045] Referring to Figs. 4 and 21, to further isolate the temperature sensor thermally from other components within the rail health monitoring device, a thermal well insulating potting compound 78 may be employed surrounding the thermal well 72. This insulating material may include low thermal conductivity materials such as silicone foams, aerogels, urethanes, or polymer-based thermal barriers. The temperature sensor enclosure may be embedded within a recess in the device housing and may be filled or surrounded by potting compounds that either enhance heat transfer (thermally conductive) or prevent heat loss / gain from other sources (thermally insulative). The thermal well ensures that the temperature sensor remains in consistent thermal contact with the rail or other monitored component, enabling precise temperature readings while protecting the sensor from mechanical stress, contaminants, and electrical interference.

[0046] Referring to Figs. 12, 14, 21, and 25-27, the temperature sensor may be configured to have suitable characteristics. There may be provided one or more rail temperature sensors 70 in some cases. In some cases, plural temperature sensors may be provided on a single part, such as the dual temperature sensor 162 potted within the center cavity of the thermal well 72 with a thermally conductive potting material (such assilicone). A dual temperature sensor 162 may also provide a means of managing stresses between the temperature sensor 70 and thermal well 72 and main PCBA 98 from thermal expansion and contraction given the environmental thermal extremes and rates of change seen by the device 10. A PCBA (Printed Circuit Board Assembly) is a printed circuit board (PCB) populated with electronic components that are soldered or mounted onto the board to create a functional electronic device. It serves as the foundation for electrical connectivity and component integration within devices such as sensors, controllers, and communication modules. The dual digital temperature sensor 162 may be incorporated onto a separate PCBA 98 and connected to the main PCBA 98 via a flex cable. This along with the potting design permits the temperature sensor 70 to float to a limited degree relative to the main fixed PCBA 98. The dual digital sensor 162 enables temperature plausibility checks and redundancy of one of the primary measurements of the device 10.

[0047] Referring to Figs. 12, 14, 21, and 25-27, the dual temperature sensor 162 may be provided as part of an assembly that has a flexible section, such as a flexible fan-shaped PCBA connector attached to a rigid sensor. The dual temperature sensor 162 may include a temperature sensor printed circuit board assembly (PCBA) 166 that may be partially embedded within a T-shaped sensor PCB recess 164 formed in the PCBA 98 of the controller of the device. The sensor assembly may comprise both a rigid PCB part 170 (PCBA 166) and a floating flex connection such as a flexible fan part 168, which may extend outward from the main body of the sensor to enable thermal contact with surfaces that are spaced apart or geometrically offset. Providing flexibility in the sensor 162 may improve the ability to bias the sensor against the rail in use, as the sensor has an inherent ability to move. The flexible fan part 168 may be formed from a suitable material, such as polyimide or other high-temperature flexible substrates to conform to curved or irregular surfaces, while the rigid PCB part 170 may provide mechanical support and electrical connectivity. The rigid part may be embedded in potting compound 80. The two temperature sensing elements may be mounted at the distal ends of the rigid part 170, enabling simultaneous and redundant temperature monitoring adjacent the rail when deployed. The flexible or fan part 168 may permit the sensor to be anchored at an angle, such as 90 degrees relative to an axis of the rigid part, securing the part 168 on the PCBA 98 while the part 170 extends at an angle normal to the PCBA 98. A flexible temperature sensor anchored on a PCBA offers the advantage of conforming to non-planar or spatially separated surfaces while maintaining reliable electrical connectivity and mechanical stability through the rigid PCB base. This configuration enables accurate temperature sensing in complex geometries without compromising durability or integration with other device electronics. This dualsensor configuration may improve thermal profiling of the rail and enhance overall measurement accuracy for predictive maintenance or thermal load analysis. In alternative embodiments, the dual temperature sensor 162 may be implemented using thermocouples, resistance temperature detectors (RTDs), or semiconductor-based temperature sensors, depending on performance requirements, form factor constraints, and environmental conditions.

[0048] Referring to Fig. 10, many rail lines extend through remote or sparsely populated regions — such as rural areas, mountainous terrain, or undeveloped industrial corridors — where cellular infrastructure is limited, unreliable, or entirely absent. As a result, there is a need for rail-side monitoring devices to incorporate long-range wireless communication capabilities that do not rely on cellular networks. These devices must beable to transmit collected data — such as temperature, vibration, or positional metrics — over long distances directly to centralized monitoring and reporting stations. This capability supports real-time alerting, remote diagnostics, and system-wide integration, enabling railway operators to maintain safe and efficient operations across expansive and infrastructure -poor territories.

[0049] Referring to Figs. 5, 9, 11, 15, 16, 17, 18, 19, and 21, the rail health monitoring device 10 may include a long-range radio wave transceiver 154 configured to transmit and receive data wirelessly for remote monitoring and control. In some embodiments, this transceiver may be integrated within the device housing 12 and operably connected to an onboard data processing system such as the microcontroller 108. Microcontroller 108 may be provided with an integrated cellular transceiver. The satellite antenna 126 may be switched for or augmented by a cellular antenna. The selection of satellite or cellular is made via an RF interconnection with multiple RF connectors 88. The transceiver 154 may support one or more communication technologies, including satellite, cellular, or other long-range protocols, depending on deployment environment and infrastructure availability. The housing 12 or part of it such as an upper window defined in the cover 24 may be configured to be radio-frequency (RF) transparent to allow effective signal transmission without external antenna exposure, using materials such as RF -permeable polymers or coated composites.

[0050] Referring to Figs. 5, 9, 10, 11, 15, 16, 17, 18, 19, and 21, in certain embodiments, the long- range radio wave transceiver may be a satellite transceiver 154 designed to communicate directly with orbiting satellites 222. The long-range radio-wave transceiver may in some cases comprise an L-band or S-band satellite modem (e.g., an Iridium™ transceiver), optionally backed up by LTE-M / NB-IoT (long Term Evolution Machine Type Communication and NarrowBand-Intemet of Things). The satellite transceiver 154 may be operably connected to a satellite antenna 126 embedded within the housing 12. The antenna 126 may have suitable parts, such as a ceramic patch 130 mounted as a ground plane, with a radiating element 136 to enable high-frequency signal propagation. This antenna assembly may be retained within the device using an antenna mount 138 or a tilted antenna mount 140 to optimize the radiation angle for satellite communication. The main dual antennas mount 140 may be tilted from horizontal to optimize the position of the antennas 126 and 174 radiation patterns relative to the head 200 of the rail 198 and the base mount. This is a further purposeful combined feature of the top of the slanted cover 24. The antennas mount 138 incorporates a dual snap clip feature 142 into the plastic to reduce the number of fasteners required to assemble the unit. This further eliminates the risk of service technicians damaging the potted electronics assembly though overtightening or cross threading screws into the aluminum or plastic mount. The snap features 142 have been incorporated into the 3D Additive Manufactured (AM) antenna mount 138, reducing the need for complicated injection molds. The antenna mount 138 slides and snaps onto two buttons 146 that are affixed with screws 148 to the base mount at the factory. The base of the buttons 146 may be relieved 150 to permit the electronics potting to flow into the retaining screw cavity to seal any path for moisture through the screw threads from above. The clip guide and retention features of the buttons 146 protrude from the potting. Mechanical features such as retaining screws 134, fasteners 156, pern nuts 158 (a type of self-clinching fastener designed to be permanently pressed into thin metal sheets, typically during manufacturing, to provide strong, reusable, and load-bearing internal threads for mating hardware like screws or bolts), and a snap feature 142 or slip feature 144 may ensure theassembly remains secure under vibration and thermal cycling. An antenna cable 145 and SMA satellite connector 160 may provide a low-loss electrical connection between the antenna and the satellite transceiver. An antenna mount Button 146 and button retaining fastener / screws 148 may be provided. In some configurations, a purposeful gap 152, such as about 5 mm, and a relief slot 150 may be included to manage thermal and electromagnetic isolation. The spacing of the radiating portion or element 136 of the satellite patch antenna 126 may be specifically placed to be a suitable gap 152, such as 5 mm, from the inner surface of the cover 24. The cover 24 may be relieved with a thinner section to help minimize the impact to the radiation pattern yet retain mechanical strength to withstand the rigors of railroad operations. The cover 24 material may be made of a suitable material such as plastic, i.e. non-metallic to be as transparent to the electromagnetic transmission of RF signals as possible yet retaining an environmental protection to the device internals.

[0051] Referring to Fig. 9, the device 10 is illustrated on a rail 198 to show the relative positioning of the bi-directional satellite (for example a satellite from the Iridium™ network) and GPS antennas 174 and 126, respectively, relative to the rail 198. Both antennas 126 and 174 may be horizontally displaced from the rail head 200 horizontally to optimize between antennas 126 and 174 performance and physical device dimensions (to keep the center mass of the device 10 closer to the rail 198, preventing it from being knocked or peeled off the rail 198). The relative positioning of the antennas 126 and 174 may be important. Both GPS and satellite antenna functions, respectively, may operate in the L l-Band (~1.5 GHz). Experiments have shown that GPS antenna 174 can negatively affect the satellite antenna 126 performance when transmitting if positioned within the radiating pattern of the satellite antenna 126. The patch of the GPS antenna 174 has been purposefully positioned to be lower than the satellite antenna ground plane 128 (as seen from a side elevation view). Both antennas 126 and 174 may be held in place in a plastic antennas mount 138. The satellite antenna 126 may be retained by two plastic screws 134 and the GPS antenna 174 by Kapton tape 182 (through slots 180 in the mount). Both are nonconductive and minimize impact to the radiation pattern of the antennas 126 and 174.

[0052] Referring to Figs. 5, 9, 10, 11, 15, 16, 17, 18, 19, and 21, in one configuration, the satellite transceiver 154 may comprise a low-earth-orbit (LEO) satellite transceiver, enabling near-real-time data transmission with reduced latency and lower power requirements compared to geostationary systems. Low Earth Orbit (LEO) satellite communications utilize satellites positioned at altitudes typically ranging from 500 to 2,000 kilometers above the Earth's surface. Due to their proximity to Earth, LEO satellites offer significantly lower latency and faster signal round-trip times compared to geostationary satellites, making them well-suited for time-sensitive data transmission. These satellites move rapidly relative to the Earth's surface, requiring ground-based or device-mounted transceivers to track or hand off communications across multiple satellites in a constellation. LEO satellite networks enable reliable, wide-area connectivity in regions lacking terrestrial infrastructure, making them ideal for applications such as remote monitoring, asset tracking, and rail-side communications in isolated environments. The use of LEO satellite networks allows the device to maintain connectivity even in remote or infrastructure -poor environments, such as rural or mountainous rail corridors. The transceiver may also support downlink capabilities, allowing the device (controller) to receive configuration updates, diagnostic queries, and scheduling commands for dynamic adjustment of sensing and reporting intervals. Overall, the long-range radio wave transceiver may be configured to receive from andtransmit data to a remote server independent from local infrastructure, for example via direct contact with a satellite. The transceiver may permit communications directly to a satellite or other remote node without a terrestrial gateway, permitting the device to be used anywhere on the planet regardless of the presence or absence of a gateway device.

[0053] Referring to Figs. 1 and 5, alternatively or additionally, the long-range radio wave transceiver154 may comprise a cellular communication module capable of connecting to terrestrial LTE, 5G, or private industrial cellular networks. In such embodiments, the transceiver may use an internal or external antenna system optimized for cellular frequencies. In some cases, the device 10 may use both communication methods - for example the satellite transceiver 154 may be configured for primary direct uplink, and the cellular provided as a secondary. The choice between satellite and cellular communication — or the use of both in a hybrid design — may depend on factors such as cost, power availability, latency requirements, and regional connectivity.

[0054] Referring to Fig. 21, regardless of the communication method used, the transceiver system may include signal conditioning, filtering, and shielding components such as the metal shield 132 to ensure electromagnetic compatibility with the rest of the device. The transceiver may be managed by firmware that handles data formatting, error correction, handshaking protocols, and secure transmission. Integration of the transceiver into the device allows for robust, remote telemetry and control, supporting both continuous monitoring and responsive field management of rail conditions and infrastructure. The long-range radio wave transceiver 154 may be further configured to receive and the controller is configured to implement configuration parameters for adjusting sensing intervals or transmission schedules. The long-range radio wave transceiver 154 may be further configured to receive and implement diagnostic queries and responses.

[0055] Referring to Figs. 2, 3, 5, 21, 23, and 24, the rail health monitoring device 10 may include a pressure relief vent 90 integrated into the housing cover 24. This vent may be useful for preventing a buildup of internal pressure due to temperature fluctuations, altitude changes, or environmental heating, which could otherwise compromise the structural integrity of the housing or damage sensitive internal components such as sensors and electronics. The vent 90 may be hydrophobic and oleophobic. Its purpose may be to ensure that the pressure within the enclosure is equalized to prevent positive and negative pressures from affecting the seal of the outer enclosure O-ring 34 between mount 46 and cover 24. Over and under pressure can lead to extrusion of the O-ring 34 and ingress of water and dirt into the seal surfaces that over cycles leads to failure of the seal. The vent 90 may also permit the enclosure to “breathe” which has been shown by industry to minimize the likelihood of moisture condensing in the enclosure as water vapor may diffuse out in equilibrium with the outside environment. Enclosures without vents and exposed to temperature cycles tend to accumulate condensation.

[0056] The pressure relief vent 90 may be specifically designed to be permeable to gases while remaining impermeable to liquids, dust, and other contaminants. This selective permeability allows the vent to maintain the internal atmospheric balance without sacrificing ingress protection, enabling the device to maintain an IP65 or higher rating. GORE™ material may be used for the vent, which typically refers to specialized membranes or venting materials made by W. L. Gore & Associates, known for their use ofexpanded polytetrafluoroethylene (ePTFE). These materials are widely used in industrial, automotive, electronics, and medical applications due to their unique combination of properties. The membrane may contain billions of microscopic pores that are large enough to allow gases (like air or vapor) to pass through but small enough to block liquids and solid contaminants such as dust, dirt, and water. GORE™ materials may repel water and many oils, making them ideal for sealing enclosures exposed to harsh environments. ePTFE may be highly resistant to chemical degradation, UV exposure, and temperature extremes, maintaining performance over long service lives. In applications like electronics enclosures or sensor housings, GORE™ vent membranes allow pressure equalization while maintaining environmental sealing, preventing condensation and stress on seals or internal components. Referring to Figs. 2, 3, 5, 21, 23, and 24, the interface between the pressure relief vent 90 and the housing cover 24 may be formed in a suitable fashion. For example, the interface may include using a snap feature 92 in combination with an O-ring seal 94, ensuring a secure, vibrationresistant fit that conforms to the specifications provided by the vent manufacturer. The O-ring seal 94 may provide a redundant environmental seal, enhancing protection against water or particulate ingress while supporting the long-term durability of the vent interface. The cover 24 itself may be produced using an additive manufacturing (3D AM) process, although alternate embodiments may use traditional fabrication techniques such as plastic injection molding or urethane casting to meet cost, scalability, or material-specific performance requirements. Integrating a pressure equalizing vent into the device housing ensures environmental robustness and operational reliability in harsh and dynamic rail environments.

[0057] Global Navigation Satellite System (GNSS) refers to a collection of satellite constellations that transmit timing and positioning data to receivers on or near the Earth’s surface. GNSS includes the well- known global position satellite (GPS) system. Prominent GNSS systems include the United States’ GPS, Russia’s GLONASS, the European Union’s Galileo, and China’s BeiDou. These systems operate by continuously broadcasting radio signals containing the satellite’s position and precise time. A GNSS-enabled device uses a GNSS receiver module to detect signals from multiple satellites — typically at least four are needed for a three-dimensional fix (latitude, longitude, and altitude). By calculating the time delay between the transmission and reception of each satellite’s signal, the receiver determines the distance to each satellite. Using trilateration, the receiver combines these distances with known satellite positions to compute the device’s precise real-time location.

[0058] Referring to Figs. 9, 16, 20, and 23, the rail health monitoring device may include a global navigation satellite system (GNSS) positioning module configured to determine the geographic location of the device when deployed in the field. In the context of a rail health monitoring device, the GNSS module captures this positional data and associates it with a timestamp, enabling accurate geolocation of sensor measurements and events. This capability is crucial for mapping infrastructure health across the rail network, enabling remote diagnostics, event correlation, asset tracking, and integration with centralized monitoring systems. A GPS / GNSS Global Navigation Satellite System may be carefully selected to minimize its current draw and minimize time to first fix for cold starts. In conjunction with the accelerometer 104, the device 10 can determine when to acquire a new fix should the device be relocated. The GNSS subsystem may comprise a GNSS module 178 operably connected to a GNSS antenna 174 and associated GNSS radiating element 176. As identifiedpreviously, the PCBA 98 may incorporate two RF connectors 88 that protrude from the potting to connect either a satellite or cellular antenna 126 and GPS antenna 174. A purposeful space between the outer edge of the PCBA 65 and the inner wall of the base mount permits the potting to seal the edge of the PCB FR4 composite material and prevent moisture ingress. The antenna may be mounted using a GNSS antenna adapter 172 to ensure correct orientation and mechanical retention within the housing. This system enables the device to acquire satellite signals and compute precise location data, which may include latitude, longitude, altitude, and corresponding timestamps. The raw data from the GNSS module may be stored locally or transmitted wirelessly to a central monitoring system, allowing for accurate geolocation of sensor readings and device status over time. Additional features, such as a Kapton™ tape 182 inserted into a Kapton™ tape slot 180, may provide thermal or electrical insulation to protect sensitive GNSS components from environmental conditions or interference. Kapton™ tape is a high-performance polyimide film tape developed by DuPont, widely used in electronics, aerospace, and industrial applications due to its unique combination of thermal, electrical, and chemical resistance properties. Such tape may be made from polyimide film and coated with a silicone adhesive on one side.

[0059] A remote monitoring device, such as one used for rail infrastructure, may use one of several types of power sources depending on the deployment environment, power requirements, and system design. If available, the device can be connected to an external power supply, such as a trackside AC or DC power line. This provides continuous energy but is often impractical in remote locations due to the lack of nearby infrastructure or the high cost of running dedicated power lines. A solar panel can charge a rechargeable battery or capacitor within the device. While solar is renewable and suitable for long-term operation, it requires consistent sunlight and can be unreliable in shaded, cloudy, or snowy conditions. It also increases device size and complexity. Techniques such as vibration or thermal energy harvesting can generate small amounts of power from the local environment. However, these methods typically provide low and inconsistent energy levels, making them insufficient for devices with higher power needs or real-time communication requirements. A sealed internal battery offers a compact, self-contained power source that can provide consistent and reliable energy over extended periods. This approach eliminates dependence on external infrastructure, reduces installation complexity, and enhances device robustness by eliminating exposed connectors or moving parts.

[0060] Battery power is often the most effective and practical choice for remote monitoring devices in rail environments. It enables true independence from infrastructure, making the device easily deploy able in remote or hard-to-access areas. Batteries can deliver stable and predictable power, supporting critical functions such as high-frequency sensing, data logging, GNSS positioning, and long-range wireless communication (e.g., via satellite). Additionally, modem lithium-based batteries offer long service lives, wide operating temperature ranges, and high energy densities, enabling years of maintenance-free operation. Combined with powerefficient electronics and transmission scheduling, battery power ensures the monitoring system remains reliable, low -maintenance, and fully autonomous.

[0061] Referring to Figs. 5, 7, 9, 11, 12, 13, and 15-22, the rail health monitoring device 10 may comprise an internal battery. The rail health monitoring device 10 may comprise an internal battery 184 configured to supply power to the device in a fully self-contained manner, enabling operation independent ofany external power source. This self-powered configuration allows the device to function reliably in remote or infrastructure-poor environments where access to trackside power is unavailable or impractical. The battery 184 may be mechanically and electrically integrated into the housing via battery terminals 186 and held securely using battery clips 188 and retainer clips 189, which may be configured to withstand vibration and shock typical of rail-side deployments. A battery contact tab 193 may facilitate electrical connectivity to the power management circuitry, while an insulating washer 190 and spacer 194 may be used to prevent short circuits and ensure proper mechanical spacing. The assembly may be secured using low -profile screws 192 to maintain a compact form factor and allow for ease of service or replacement. This integrated battery system ensures continuous power availability for sensing, data logging, and wireless transmission functions across a wide range of operational conditions. The battery may be selected and operated to permit a charge to last for more than one, in some cases more than two years without changing or charging batteries.

[0062] The battery 184 may have suitable characteristics. The battery 184 is retained in a spring loaded battery clip 188. Further clips 189 can be added to the two battery retainer clips 188 to keep them closed and prevent the spring clips 188 from opening. To prevent the battery 184 from being inserted in reverse polarity, a red insulating washer 190 has been added to the positive terminal 186 of the battery clip 188. This provides visual confirmation and if the battery 184 is inserted backwards, physically prevents the negative terminal 186 of the battery 184 making contact with the positive battery contact. The battery clip 188 is soldered into the PCBA 98 (Printed Circuit Board Assembly) and retained with two low profile socket head cap screws 192. The battery clip 188 may be spaced off the PCBA 98 with two spacers 194 that incorporate relief slots to permit the potting compound to seal the threads of the clip retaining screws 192 and ensure the clip 188 and battery 184 remain above the potting. The retaining screws 192 into the base mount ensure forces from retaining the battery 184 and handling are transferred to the base mount and not the soldered tabs of the battery contacts. The battery contact tabs 193 may be electrically insulated from the battery clip 188 with use of lengths of heat shrink (not shown) to prevent electrical shorting of the battery 184 with the clip 188.

[0063] In a satellite-communicable rail health monitoring device, power draw is a critical design consideration due to the high energy demands of satellite communication components and the need for longterm autonomous operation in remote environments. The most significant power consumption typically occurs during data transmission events, where the satellite transceiver (e.g., a low-earth-orbit module) requires a high peak current to establish uplink communication with orbiting satellites. This transient power demand may be managed through capacitive buffering and high-discharge-rate battery cells to ensure voltage stability. In contrast, the device may enter a low-power or sleep state between transmissions, during which only essential subsystems such as the real-time clock, GNSS synchronization, or internal diagnostics remain active. Power management firmware governs the sensing and transmission intervals, optimizing the duty cycle to minimize overall energy consumption without compromising data fidelity. Advanced implementations may dynamically adjust reporting frequency based on event thresholds or remote configuration updates received via downlink, further conserving power. The resulting power budget enables the device to operate for extended periods — ranging from months to years — on a single internal battery pack, even in environments where recharging or maintenance is impractical.

[0064] Referring to Fig. 23, the rail health monitoring device 10 may comprise a supercapacitor system. The system may be housed within a designated supercapacitor chamber 110, which contains one or more supercapacitors 112. These supercapacitors may be configured to charge gradually from the internal battery 184 during periods of low activity and subsequently deliver high-current bursts of power to the long- range radio wave transceiver 154 during data transmission events. Supercapacitors — also referred to as ultracapacitors — are electrochemical storage devices known for their exceptionally high power density, fast charge and discharge rates, and long cycle life. In this implementation, the supercapacitors 112 may be used to buffer the internal power system, effectively offloading peak power demands from the battery 184. This arrangement helps to minimize voltage drops and extend battery lifespan by preventing excessive current draw during satellite communication events, which typically represent the most power-intensive operation of the device. The supercapacitor chamber 110 may be thermally and mechanically isolated to protect the supercapacitors from environmental stressors, while also ensuring efficient integration with the surrounding power and communication subsystems. By incorporating a supercapacitor-based energy buffer, the device achieves greater energy efficiency, system reliability, and autonomy, especially in infrastructure -free, remote rail environments where power conservation is critical. Super or ultra capacitors may manage peak and average current draw from the battery 184 with charging and current limiting managed by integrated circuits. Currents exceeding the peak draw or average draw on the battery 184 quite significantly reduce battery life. Battery current and voltage and capacity are accurately measured using an integrated battery monitor.

[0065] Referring to Figs. 5, 12, 14, 19, and 21-24, the rail health monitoring device may comprise an integrated controller 108. A suitable controller 108, such as a microcontroller (MCU), may be configured to manage sensing operations, data processing, power regulation, and communication scheduling. A microcontroller is a compact integrated circuit designed to execute programmed instructions, typically combining a processor core, memory (such as flash and RAM), and input / output peripherals on a single chip. MCUs are well-suited for embedded applications due to their low power consumption, cost-effectiveness, and real-time processing capabilities. Alternatives to a microcontroller may include digital signal processors (DSPs) for more complex signal processing tasks, field-programmable gate arrays (FPGAs) for customizable hardware acceleration, or application-specific integrated circuits (ASICs) designed for highly optimized, dedicated functions.

[0066] Referring to Figs. 5, 12, 14, 19, and 21-24, the controller 108 may have suitable components. The controller 108 may include embedded flash memory 116 for storing firmware and logging sensor data, as well as a real-time clock to maintain accurate time-stamping. It may interface with various sensors and modules, including a battery monitor 113 to continuously assess battery 184 health and power status. The controller 108 and related components may be mounted on a printed circuit board assembly (PCBA) 98, which may also support additional elements such as an LED indicator 100, a serial connector 102 for wired communication or debugging, and a vibration sensor or accelerometer 104 for monitoring track conditions. The Light Emitting Diode (LED) 100 may be potted and may be activated to indicate either device health and diagnostics through a heartbeat and pulsing. The LED indicator 100 may be turned off to extend battery life when the device 10 is closed. The external serial terminal connector 102 may be provided for programming anddebugging and monitoring the device 10. A low -noise amplifier (LNA) receiver circuit 106 may be included on the PCBA 98 to enhance signal sensitivity for wireless communications. This entire assembly may be housed within a potting cavity 125 and encapsulated with potting compound 122 to protect against moisture, dust, vibration, and other environmental stressors. The board edge cap 114 and mounting screws 124 help secure the PCBA 98 within the housing, ensuring mechanical stability during rail-side deployment. The controller 108 may communicate with an embedded SIM (eSIM) 118. The electronic SIM (subscriber identity module) 118 IC may store identification information for cellular networks. The controller 108 may comprise non-volatile memory for raw and analyzed data and diagnostics storage.

[0067] The microcontroller 108 may control all functions of the device 10 but also facilitates edge computing and running of on board analyses and modelling to reduce data to key results to be encoded in small packets and sent via satellite of cellular connections to the cloud 232. Smaller, compressed data packets, along with putting the microcontroller 108 in sleep modes between required activities further minimizes current draw and maximizes battery life. The microcontroller 108 may maintain a Real Time Clock (RTC) such that data collected is timestamped. The RTC may be adjusted with incoming time provided by the GPS (Global Positioning System) receiver upon successful acquisition of GPS signals.

[0068] Referring to Figs. 5, 12, 14, 19, and 21-24, the controller 108 may be further configured to encode and compress raw data — comprising signals, from the rail temperature sensor and other sensors such as the accelerometer 104, and that are timestamped — into output data packets optimized for transmission. These data packets may then be transmitted at predetermined intervals to a remote server via the long-range radio wave transceiver, enabling efficient and reliable remote monitoring of rail conditions. The controller may manage power consumption by placing subsystems into low-power or sleep modes during inactivity and activating higher power modules, such as the satellite transceiver, according to configurable duty cycles or sensor-triggered events. Through this architecture, the controller supports robust, autonomous operation of the rail health monitoring device, facilitating reliable data acquisition, processing, compression, and long-range wireless communication in remote rail environments. In a low-power remote rail health monitoring device, packetizing and encoding / compressing data may be beneficial for efficient and reliable wireless transmission while minimizing energy consumption. Raw sensor data, which may include timestamped measurements from temperature sensors, vibration sensors, and GNSS modules, is first aggregated and formatted into discrete data packets by the device’s controller. Packetizing organizes the data into manageable units with defined headers, payloads, and error-checking codes, facilitating accurate transmission and reception. Encoding techniques, such as forward error correction (FEC), and encryption, may be applied to improve data integrity over noisy or unreliable communication channels. Compression algorithms, tailored for low-power embedded systems, reduce the overall data size by eliminating redundancy and encoding patterns within the sensor data. This reduction in packet size directly lowers the transmission duration and the required radio power, significantly conserving battery life. The controller may dynamically adjust the compression level and packet size based on available power, communication link quality, and data priority, balancing the trade-off between data fidelity and energy efficiency. Collectively, these data handling strategies enable long-term autonomous operation ofthe rail health monitoring device in remote environments where power resources are limited and reliable data reporting is critical.

[0069] The controller may comprise an electronic means of switching the battery 184 on and off. This may be driven by the embedded microcontroller 108 to turn off the device or on and off via the integrated NFC functionality, whereby a mobile device 234 communicates with the microcontroller 108 via the embedded dynamic NFC tag integrated circuit. Further mechanisms may be incorporated to turn on and off internal loads to further minimize battery current draw and extend battery life. These include a GPS receiver, a supercap charger, and a satellite transceiver 154.

[0070] The controller 108 may be configured to respond and adapt to rail conditions. The controller108 may be configured to respond and adapt to rail conditions by dynamically adjusting operational parameters by balancing risk with optimization of performance and power consumption. For example, the controller 108 may modify power-saving modality and modify transmission intervals based on sensor data. Specifically, the controller 108 may be configured to adjust a transmission schedule of predetermined intervals based on risk level, for example to reduce the predetermined intervals between data transmissions when one or more signals included in the raw data indicate a change from a lower risk range to a higher risk range, thereby initiating more frequent reporting under critical conditions. The reduction or change in interval time may be selected according to a range of plural risk levels, with higher risk levels warranting shorter reporting periods. For example, the controller 108 may, in normal operation, report every hour on a particular set of data. However, upon detecting a rail temperature above a particular threshold, such as a low to medium risk threshold, the controller 108 may decrease reporting interval time to 30 minutes, as the temperature has passed into a medium risk range. Upon detecting that the rail temperature has passed above a further threshold, such as a medium to high threshold, the controller 108 may decrease reporting intervals to 15 minutes. Other reporting intervals shorter or longer may be used. Plural ranges may be used, and the controller 108 is also configured to increase the intervals when the risk level drops. Additionally, the controller 108 may control the monitoring process by sampling one or more sensors according to a predetermined schedule, allowing for efficient and timely acquisition of rail condition data. The sampling intervals may be selected based on various factors, such as the type of sensor, or risk level. A sampling interval for a GPS module may be once a day, whereas a sampling interval for temperature may be every fifteen minutes.

[0071] Referring to Fig. 14, the rail characteristic sensor of the device 10 may comprise an orientation sensor. Orientation sensors are devices used to detect and measure the angular position or movement of an object relative to a reference frame, often providing critical data on tilt, rotation, and vibration. These sensors may include gyroscopes, magnetometers, inclinometers, and accelerometers, each employing different physical principles to determine orientation or motion characteristics. Among these, accelerometers possess the ability to measure linear acceleration forces along one or more axes, enabling detection of changes in velocity, inclination, and vibration. An accelerometer typically consists of a microelectromechanical system (MEMS) structure that converts mechanical motion into electrical signals, which are then processed by the device’s controller to infer orientation or dynamic movement. In rail health monitoring applications, an accelerometercan provide valuable data regarding track vibrations, impacts, and shifts in alignment, helping to identify potential faults or stress points in the rail infrastructure.

[0072] Vibration sensors are specialized devices designed to detect oscillations and mechanical vibrations within structures or machinery, providing important insights into operational health and structural integrity. An accelerometer can function effectively as a vibration sensor by measuring rapid changes in acceleration caused by vibrational forces acting on the monitored object. In railroad applications, accelerometers detect track vibrations induced by passing trains, environmental factors, or structural anomalies such as cracks or loose fasteners. By capturing and analyzing vibration signatures, the accelerometer-based vibration sensor can identify irregular patterns or spikes indicative of potential rail defects or maintenance needs. This real-time monitoring enables proactive intervention, enhancing safety and reliability in rail operations.

[0073] An accelerometer serves as a versatile sensor capable of providing both dynamic and static orientation information, which may be beneficial for comprehensive railroad monitoring. Static orientation data from the accelerometer can reveal the tilt or inclination of rail components relative to gravity, allowing detection of track misalignment, settlement, or deformation over time. Dynamic data, on the other hand, captures rapid changes in acceleration due to vibrations, shocks, or impacts, which are critical for identifying transient events such as passing trains, sudden track shifts, or impacts from external sources. By combining static and dynamic orientation measurements, the accelerometer enables continuous assessment of rail health, facilitating early detection of structural issues and supporting predictive maintenance strategies that enhance rail safety and operational efficiency.

[0074] Referring to Fig. 14, the device 10 may comprise one or more accelerometers 104. The accelerometer 104 may be located at a suitable position, such as on the PCBA 98, and may collect dynamic and / or static data. The accelerometer may comprise a triaxial accelerometer. A tri-axial accelerometer measures acceleration along three orthogonal axes — typically X, Y, and Z — providing comprehensive data on movement and orientation in three-dimensional space. This capability allows for accurate detection of complex vibrations, tilts, and dynamic forces affecting a monitored structure such as a railroad track. A triaxial accelerometer may be configured to provide data that includes both: (i) static orientation data of the rail; and (ii) dynamic vibration data of the rail under traffic. The data from the accelerometer 104 may be combined with the data from the temperature sensor to form part of the raw data that is received and processed by the controller 108. Thus, the raw data sent to the controller 108 may comprise signals, from the orientation sensor, that include information on one or more of tilt, velocity, acceleration, displacement, and vibration modes, of the rail. A vibration mode may include information on one or more amplitude and direction at specific frequencies. In some cases, the controller will be used to process the raw data prior to sending to the transceiver, for example acceleration data may be received and used by the controller to compute vibration modes, and the vibration modes is sent to the transceiver rather than the raw acceleration data.

[0075] A triaxial accelerometer 104 may enable a variety of functions. Dynamic analyses can assess relative track voiding and pump, lateral wheel set tracking, vibrations from defective bearings and wheel flat spots. The accelerometer 104 has been carefully positioned next to a PCBA 98 mounting point to maximizetransfer of accelerations from the rail 198 to the sensor through the PCBA 98 and base mount. The PCBA 98 potting further reduces unwanted signals from any PCBA 98 flex under vibration loads.

[0076] Referring to Figs. 1 and 4, the cover 24 of the rail health monitoring device 10 may be designed to provide clear identification and communication features that improve operator interaction and device management. The cover 24 may incorporate a debossed logo and device description on the front 20 face to clearly identify the unit to operators who may be unfamiliar with its purpose or authorized presence on the rail 198. This identification helps prevent unintended removal or unnecessary operator inquiries, which experience has shown can occur when unidentifiable objects are placed on the rail.

[0077] The device 10 may integrate near-field communication (NFC) technology to facilitate secure, short-range wireless interactions between the device and authorized personnel. The cover 24 may include a debossed NFC wayfinding mark 82 located on the right-hand side 18 (as viewed from the mount front 20), conforming to universal wayfinding standards defined by the NFC Forum, which indicates where NFC communication may be established. NFC enables quick access to device information, configuration settings, diagnostics, or firmware updates via a compatible mobile device. This wayfinding mark 82 aligns with the NFC antenna 84 mounted to the side of the printed circuit board assembly (PCBA) 98, allowing communication through the NFC dynamic tag RC 86, with an RF connector 88 facilitating connectivity. The PCBA 98 may thus incorporate an NFC Near Field Communications antenna 84, for example on the right hand side. This may be either embodied as a soldered antenna or fully integrated with the main PCBA 98 as a flexure (PCBA has a flex middle layer with traces between the trace antenna and the main PCBA circuitry.) The NFC antenna 84 may be placed such that its active trace portion of the antenna 84 is below the ground plane of the GPS antenna 174 to reduce the potential for interference. Furthermore, it was placed to ensure the embedded trace antenna 174 is spaced sufficiently far from the base mount to minimize the mount’s impact on the antennas 174 radiation pattern.

[0078] Furthermore, the cover 24 may be designed to mitigate environmental effects that could impact sensor accuracy, specifically solar heating. By selecting a light-colored material for the cover 24, the device 10 minimizes solar heat absorption, ensuring that temperature measurements reflect the actual rail 198 conditions rather than heat generated by the device itself. This design consideration enhances the accuracy and reliability of the rail temperature monitoring function under varying environmental conditions.

[0079] Referring to Figure 10, an example rail health monitoring system is illustrated comprising a plurality of rail health monitoring devices 10 deployed along a railroad to monitor rail conditions in real-time. Each device 10 may collect sensor data and transmits encoded and compressed output data packets wirelessly to a remote server 224 via a satellite 222 communication link. The system architecture supports extensive geographic coverage, enabling monitoring of remote rail segments where traditional communication infrastructure may be unavailable. The remote server 224 may be configured to receive and decode the output data packets transmitted by the rail health monitoring devices 10. Upon decoding, the server may store the extracted information in a database 230 for further analysis and historical record-keeping. The system may include memory 226 for buffering raw data and program module code (compiled or script) on the devices or the server to ensure data integrity during transmission delays or interruptions. Decoding and decompressing of theoutput data packets occur either on the server or an associated cloud computing platform 232, facilitating scalable data processing and management. Furthermore, processed rail condition information may be accessible via a display 228 connected adjacent the server 224 or may be accessible remotely via one or more plural mobile devices 234, enabling authorized personnel to remotely monitor rail status, receive alerts, and make informed maintenance decisions based on real-time and historical data.

[0080] Referring to Figs. 28-31 , various exemplary screenshots of application software used to visualize data from the system are illustrated. One purpose of the device 10 is to measure information related to the static and dynamic track geometry, rail temperature condition and device diagnostics and transmit that telemetry to railroad operators via satellite or cellular means. Application layer software refers to programs and protocols that operate at the highest level of a communication system, enabling end-user services such as data processing, user interfaces, and device management. It facilitates direct interaction with hardware or network resources by interpreting, formatting, and presenting data according to the needs of specific applications. The collected data may be displayed via various dashboards to operators, such as via display 228 or mobile devices 234. Dashboards or other user interfaces may be customized to show either current data value or data trends to assist in managing rail logistics and service and maintenance operations. Referring to Fig. 28, an example of a chart of data for a rail health monitoring device 10 is illustrated, trending for rail temperature 210, time to first fix for GPS 214, satellite communications transmissions dropped 216, and accumulated battery current or voltage 218. Other aspects of data such as Z axis acceleration may be displayed. As can be seen, rail temperature follows a daily cycle dependent on ambient temperature, but experiences different fluctuations based on events such as the presence of a train.

[0081] Various aspects of data may be collected and / or displayed. The following data are examples of data that may be encoded, encrypted, checksum protected and transmitted: UTC (Coordinated Universal Time) Timestamped, RSSI (Received Signal Strength Indicator - actual), TX (Transmission) number (actual, Dropped and retries are derived from steps between successful TX), Energy (Last from last TX as cannot tell until end of current TX), TX duration (last, from last TX as cannot tell until end of current TX), Temperature readings since last TX, Accelerometer readings (X,Y,Z) since last TX, Location (Latitude, Longitude) since last TX, Battery current readings since last TX, Accumulated current readings since last TX, Battery voltage readings since last TX, and FW (Firmware) Version and Reset Flag should this occur since last TX. The satellite or cellular antenna 126 or NFC antenna 84 means of communications and serial terminal may permit the downlinks to the device 10 to update configuration parameters as well as updating of firmware.

[0082] For satellite and cellular communications, a dynamic retry strategy handles failed communications. Should a transmission fail, the device may continue to collect data and after a predetermined period a new packet is encoded containing the previous data and new data and a retransmission of the new packet is attempted. A transmission success event notification may be provided to the device by the satellite or cellular network. Data, once received by the satellite or cellular network may be made available to a back-end server. This data is then forwarded to a data management front end, decoded, decrypted and individual measurements then placed into database fields for display to operators.

[0083] Referring to Figs. 29-31 , various screenshots are illustrated providing different data for observation and analysis. Fig. 29 exemplifies the ability to communicate graphical and spot data via a mobile phone or tablet or computer interface. In the example shown, a smaller subset of data is illustrated than what is shown in Fig. 28. Data may be filtered, focused, or otherwise processed for analysis. Fig. 30 illustrates a screenshot of a map, detailing that the device and measurements may be geolocated. Fig. 31 details an example of compressed and encoded data with transmission metadata, the particular example shows data transmitted via satellite 222.

[0084] Embodiments of the disclosure may have one or more of the following advantages. Real-timeData and Alerts: Integrating real-time data with operational decision-making processes through automated alerts generated and sent by the remote server and dashboards allows for targeted and timely interventions, reducing unnecessary disruptions. Accuracy and Calibration: Ensuring sensors are correctly calibrated and installed is crucial for providing accurate temperature readings. Maintenance and environmental factors can impact sensor performance. Data Integration: Combining data from various sensors into a cohesive monitoring system is essential for effective monitoring and decision-making. Real-time data integration is particularly important. Robustness and Maintenance: Sensors and systems must be robust enough to withstand harsh rail environments, including extreme temperatures, solar loading, dirt, oil, vibration, and rough handling from railway operations. They should also require minimal maintenance. Installation Effort: Installing fixed devices can be labor-intensive, requiring careful consideration of rail profiles and local physical environments. Network Access: Ensuring reliable network access (cellular or radio) in very remote and isolated areas is challenging but essential for continuous monitoring. Environmental Resilience: Devices must operate effectively in all weather conditions, including rain, ice, snow, and a wide range of ambient temperatures from -40°C to +56°C. Battery Capacity and Life: High communication demands can drain battery life quickly. Ensuring long battery life and capacity is crucial for sustained monitoring, especially in remote locations.

[0085] In the claims, the word “comprising” is used in its inclusive sense and does not exclude other elements being present. The indefinite articles “a” and “an” before a claim feature do not exclude more than one of the feature being present. Each one of the individual features described here may be used in one or more embodiments and is not, by virtue only of being described here, to be construed as essential to all embodiments as defined by the claims.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR PRIVILEGEIS CLAIMED ARE DEFINED AS FOLLOWS:

1. A rail health monitoring device comprising: a housing; a magnetic rail connector; a rail characteristic sensor; a long-range radio wave transceiver configured to receive from and transmit data to a remote server; and a controller configured to encode and compress raw data, which comprises timestamped signals from the rail characteristic sensor, into output data packets and to transmit the output data packets at predetermined intervals to the remote server via the long-range radio wave transceiver.

2. The rail health monitoring device of claim 1 in which the long-range radio wave transceiver is configured to transmit the output data directly to, and receive data directly from, a satellite.

3. The rail health monitoring device of claim 2 in which the long-range radio wave transceiver comprises a low-earth-orbit satellite transceiver.

4. The rail health monitoring device of any one of claim 2 - 3 in which the long-range radio wave transceiver is further configured to receive and the controller is configured to implement one or more of: configuration parameters for adjusting sensing intervals or transmission schedules; and diagnostic queries and responses.

5. The rail health monitoring device of any one of claim 1 - 4 in which the rail characteristic sensor comprises a sensor configured to measure one or more of orientation and vibration.

6. The rail health monitoring device of claim 5 in which the sensor comprises an accelerometer.

7. The rail health monitoring device of claim 6 in which the raw data comprises signals, from the sensor, that include information on one or more of tilt, velocity, acceleration, displacement, and vibration modes, of the rail.

8. The rail health monitoring device of any one of claims 6 - 7 in which the accelerometer comprises a triaxial accelerometer configured to provide data that includes both:(i) static orientation data of the rail; and(ii) dynamic vibration data of the rail under traffic.

9. The rail health monitoring device of any one of claim 1 - 8 further comprising a global navigation satellite system (GNSS) positioning module, and the raw data comprises signals, from the global positioning module, that include information on device location and timestamp.

10. The rail health monitoring device of any one of claim 1 - 9 in which the controller is configured to adjust a transmission schedule of predetermined intervals based on risk level.

11. The rail health monitoring device of any one of claim 1 - 10 in which the rail characteristic sensor comprises a rail temperature sensor.

12. The rail health monitoring device of claim 11 in which the rail temperature sensor is configured to bias against the rail and be in thermal communication with the rail when the rail health monitoring device is mounted to the rail.

13. The rail health monitoring device of any one of claim 11 - 12 in which: the rail temperature sensor is located in a thermal well defined by an external surface of the housing, and is thermally isolated from the rest of the rail health monitoring device; and the thermal well comprises a thermally conductive liner encircled by a thermally insulative liner.

14. The rail health monitoring device of any one of claim 1 - 13 further comprises an internal battery and is configured to be self-powered independent of any external power source.

15. The rail health monitoring device of any one of claim 13 - 14 further comprising a supercapacitor that is: configured to charge over time via the internal battery; and provide power to the long-range radio wave transceiver.

16. The rail health monitoring device of any one of claim 12 - 15 in which the controller is configured for low power operation by : entering a sleep mode in between data collection and transmission; and following a sampling and transmission schedule of predetermined intervals.

17. The rail health monitoring device of any one of claim 1 - 16 in which the magnetic rail connector is configured to couple to a web of a rail in use.

18. The rail health monitoring device of any one of claim 1 - 17: further comprising a satellite antenna embedded within the housing; and in which the housing is configured to be radio frequency transparent.

19. The rail health monitoring device of any one of claim 1 - 18 in which the housing comprises a pressure equalizing vent impermeable to liquid and solid transfer.

20. A rail health monitoring system comprising the rail health monitoring device of any one of claim 1 - 19 deployed on a rail of a railroad.

21. The rail health monitoring system of claim 20 comprising the remote server, which is connected to: receive and decode the output data packets; transmit configuration parameters, and diagnostic queries; and store information from the output data packets in a database.

22. A method comprising: monitoring a characteristic of a rail of a railroad, using one or more sensors enclosed within a housing that is magnetically mounted to a side of the rail; encoding and compressing raw data, which comprises timestamped signals from the one or more sensors, into output data packets, using a controller; and transmitting the output data packets at predetermined intervals to a remote server.

23. The method of claim 22 further comprising reversibly installing the housing on the side of the rail.

24. The method of any one of claim 22 - 23 in which monitoring comprises sampling the one or more sensors according to a predetermined schedule.

25. The method of any one of claim 22 - 24 in which the one or more sensors comprise a rail temperature sensor.

26. The method of any one of claim 22 - 25 further comprising buffering the raw data in a non-volatile memory.

27. The method of any one of claim 22 - 26 further comprising decoding and decompressing the output data packets.

28. The method of claim 27 further comprising storing information from the output data packets on a remote database.

29. The method of any one of claim 22 - 28 further comprising operating the controller on a power management cycle where one or both the controller and a long range radio wave transceiver are cycled between: a sleep mode in between data readings and transmissions; and a wake mode during data readings and transmissions.

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