Commercial vehicle steering hydraulic pipeline clamp integrated with oil temperature monitoring function and method

Abstract

The invention discloses a commercial vehicle steering hydraulic pipeline clamp integrated with an oil temperature monitoring function and a method, and relates to the technical field of vehicle steering pipeline monitoring, the commercial vehicle steering hydraulic pipeline clamp comprises a clamp body, and the surface of the clamp body is provided with a channel used for containing a steering hydraulic oil pipe; the plurality of temperature sensing units are arranged on the inner side wall of the clamping hoop body; the plurality of heat conduction gaskets cover the outer side of the temperature sensing surface of the temperature sensing unit and protrude out of the surface of the inner side wall of the clamp hoop body; and the signal transmission unit is electrically connected with the plurality of temperature sensing units and is fixedly connected in the clamp hoop body. The clamp hoop body is of an integrally-formed structure, the cross section of the clamp hoop body is of a double-groove type, the clamp hoop body comprises the middle of the bottom and side walls extending upwards from the two sides of the bottom, and the tail ends of the side walls are bent inwards to form arched clamp plates.

Description

Technical Field

[0001] This application relates to the field of vehicle steering pipeline monitoring technology, and in particular to a commercial vehicle steering hydraulic pipeline clamp and method with integrated oil temperature monitoring function. Background Technology

[0002] In commercial vehicle steering hydraulic systems, monitoring the hydraulic oil temperature is crucial for ensuring driving safety. Currently, there are limited solutions for monitoring steering system oil temperature. A common practice is for maintenance personnel to use a handheld infrared thermometer or a contact thermometer to periodically or periodically test the oil lines during malfunctions. Another solution is to connect or install a separate oil temperature sensor in series with the hydraulic circuit. This sensor is mounted on a tee or connector in the circuit via a threaded interface, and the signal is routed through a wiring harness to a display or alarm device in the driver's cab.

[0003] Currently, oil temperature monitoring in commercial vehicle steering systems mainly relies on maintenance personnel using handheld temperature measuring devices for spot measurements or connecting independent oil temperature sensors in series in the oil circuit. The former cannot achieve continuous real-time temperature monitoring and has safety blind spots; the latter requires disassembly and modification of the original hydraulic circuit, which is complex to install and damages the original system's sealing integrity, posing a risk of hydraulic oil leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a clamp and method for a commercial vehicle steering hydraulic pipeline with integrated oil temperature monitoring function, which at least solves one of the technical problems of the inability to achieve continuous real-time temperature monitoring, the existence of safety blind spots, the need to disassemble and modify the original hydraulic oil circuit, the complexity of installation and the damage to the sealing integrity of the original system, and the risk of hydraulic oil leakage.

[0005] This invention provides the following solution:

[0006] According to one aspect of the present invention, a commercial vehicle steering hydraulic line clamp with integrated oil temperature monitoring function is provided, comprising:

[0007] The clamp body has a channel on its surface for accommodating the steering hydraulic oil pipe;

[0008] Multiple temperature sensing units are provided, and all of the multiple temperature sensing units are disposed on the inner sidewall of the clamp body;

[0009] Multiple thermally conductive pads cover the outer side of the temperature sensing surface of the temperature sensing unit and protrude from the inner wall surface of the clamp body.

[0010] A signal transmission unit is electrically connected to multiple temperature sensing units and is fixedly connected inside the clamp body.

[0011] Furthermore, the clamp body is an integrally formed structure with a double-groove cross-section. The clamp body includes a bottom center and side walls extending upward from both sides of the bottom. The ends of the side walls are bent inward to form an arched clamping plate. A disc-shaped base is provided on the outer bottom of the clamp body.

[0012] Furthermore, the bottom inner side of the clamp body is provided with multiple grooves, and multiple temperature sensing units are embedded in the grooves.

[0013] Furthermore, the thermally conductive pad is an arc-shaped pad, which is filled between the temperature sensing unit and the inner wall of the clamp body.

[0014] Furthermore, the signal transmission unit includes a cable, one end of which is electrically connected to the temperature sensing unit, and the other end of which is electrically connected to an electrical connector.

[0015] Furthermore, the signal transmission unit also includes a microcontroller and a CAN bus transceiver. The microcontroller is configured to receive signals from the signal processing circuit and generate message data conforming to the CAN protocol.

[0016] Furthermore, it also includes a signal processing circuit, which is disposed on the clamp body or integrated inside the signal transmission unit. The input end of the signal processing circuit is electrically connected to the temperature sensing unit, and the output end is electrically connected to the signal transmission unit.

[0017] According to a second aspect of the present invention, an oil temperature monitoring method is provided, comprising:

[0018] Wrap the clamp body around the surface of the steering hydraulic oil pipe and make the heat-conducting pad contact the oil pipe wall; then fix the clamp body on the oil pipe support;

[0019] Establish a connection between the signal transmission unit and the vehicle ECU;

[0020] The temperature sensing unit acquires an electrical signal characterizing the oil pipe temperature, and the signal transmission unit sends the electrical signal to the ECU.

[0021] In the ECU, the temperature value corresponding to the electrical signal is compared with a preset threshold stored in the memory. If the temperature value is greater than the preset threshold, an alarm is triggered.

[0022] Furthermore, the acquisition of the electrical signal characterizing the oil pipe temperature through the temperature sensing unit includes:

[0023] Multiple temperature sensing units distributed along the axial direction of the clamp body are used to simultaneously acquire initial temperature signals at multiple different locations.

[0024] In the signal processing circuit of the ECU or the clamp, the plurality of initial temperature signals are converted into the corresponding plurality of temperature sample values;

[0025] The comprehensive temperature value is calculated based on the multiple temperature sampling values.

[0026] Furthermore, the step of triggering an early warning if the temperature value exceeds a preset threshold specifically includes:

[0027] A first warning threshold and a second warning threshold are set in the ECU, wherein the second warning threshold is greater than the first warning threshold;

[0028] If the temperature value is greater than the first warning threshold and less than or equal to the second warning threshold, the control prompting device will execute a first-level warning.

[0029] If the temperature value exceeds the second warning threshold, the control and prompting device will issue a second-level warning.

[0030] The Level 1 and Level 2 warnings are presented in different forms.

[0031] The above solution achieves the following beneficial technical effects:

[0032] This application integrates the temperature monitoring function with the pipeline fixing clamp, which can be directly wrapped and fixed to the existing steering oil pipe without any disassembly or structural modification of the original hydraulic oil circuit. This achieves non-destructive installation of the sensor, greatly simplifies the installation process, and avoids the leakage risk that may be introduced by modifying the oil circuit.

[0033] This application utilizes the inherent mechanical fastening force of the clamp body to maintain tight contact between the heat-conducting pad and the temperature sensing unit and the outer wall of the oil pipe. This overcomes the problems of loosening, displacement, or poor contact that may occur with traditional bundled or adhesive sensors due to long-term vehicle vibration, ensuring the stability of the heat transfer path. This achieves continuous and reliable monitoring of oil temperature and improves the accuracy of the measurement data.

[0034] This application utilizes an integrated grooved structure for the clamp body, connected to the bracket by a bottom conical rubber pad. The structure itself possesses excellent elasticity and damping characteristics. Simultaneously, the elastic heat-conducting pad, in addition to conducting heat, also provides secondary cushioning. This multi-layered vibration reduction design effectively isolates and attenuates vibrations and impacts from vehicles and road surfaces, protecting the embedded temperature sensing unit and its connecting wiring, and improving the durability and service life of the entire monitoring system under harsh operating conditions. Attached Figure Description

[0035] Figure 1 This is a perspective view of a commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function provided by one or more embodiments of the present invention.

[0036] Figure 2 This is a front view of a commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function provided in one or more embodiments of the present invention.

[0037] Figure 3 This is a flowchart of an oil temperature monitoring method provided by one or more embodiments of the present invention.

[0038] Figure 4 This is a schematic diagram of the oil temperature judgment logic of an oil temperature monitoring method provided in one or more embodiments of the present invention.

[0039] The components include: 1. clamp body; 2. temperature sensing unit; 3. thermally conductive pad; 4. cable; and 5. signal transmission unit. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Figure 1 This is a perspective view of a commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function provided by one or more embodiments of the present invention.

[0042] Figure 2 This is a front view of a commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function provided in one or more embodiments of the present invention.

[0043] like Figures 1-2 The commercial vehicle steering hydraulic line clamp with integrated oil temperature monitoring function shown includes:

[0044] The clamp body 1 has a channel on its surface for accommodating the steering hydraulic oil pipe;

[0045] Furthermore, the clamp body 1 is an integrally formed structure with a double-groove cross-section. The clamp body 1 includes a bottom center and side walls extending upward from both sides of the bottom. The ends of the side walls are bent inward to form an arched clamping plate. A disc-shaped base is provided on the outer side of the bottom of the clamp body 1.

[0046] Specifically, the clamp body accommodates and positions the steering hydraulic oil pipe through a channel opened on its inner side; the contour of the channel is adapted to the outer diameter of the oil pipe to ensure that the oil pipe is in the predetermined position after installation; the clamp body is integrally formed by stamping and bending metal sheet; its cross-section is designed as a double-groove structure, which is composed of the main bearing groove in the middle and the auxiliary positioning grooves on both sides, forming a stable multi-point support system;

[0047] The bottom center area of ​​the clamp body serves as the main load-bearing part, and its thickness has been optimized to balance weight and stiffness requirements. The sidewalls extending upward from both sides of the bottom adopt a gradually changing thickness design to achieve weight reduction while ensuring structural strength. The ends of the sidewalls are formed into inward arched clamps through a precision bending process. These clamps have a predetermined radius of curvature and elastic modulus, generating continuous radial clamping force during clamp installation. The contact area between the arched clamps and the outer surface of the tubing adopts a smooth transition design to avoid stress concentration.

[0048] The disc-shaped base on the outer bottom of the clamp body is made of rubber and is firmly bonded to the metal body through a vulcanization process. The central axis of the base coincides with the central axis of the clamp body to ensure uniform stress. The cross-section of the disc-shaped base is trapezoidal, with its outer diameter larger than its inner diameter, forming a stable support surface. The base has a reinforcing rib structure inside, and these ribs are distributed radially to effectively improve the compressive strength and durability of the base.

[0049] In terms of mechanical properties, the structural design of the clamp body must meet specific stiffness requirements, and its bending section modulus must be... It can be calculated using the following formula: ,in This represents the width of the side wall of the clamp body. This represents the thickness of the sidewall; this coefficient ensures that the clamps maintain structural integrity under external loads; simultaneously, it represents the elastic restoring force of the arched clamps. Its deformation The relationship between them satisfies: ,in This is the stiffness coefficient of the clamping plate, which is related to the elastic modulus of the material. and the moment of inertia of the clamping plate section Related, specifically: ,in This is the effective length of the clamping plate;

[0050] During installation, the double-groove structure of the clamp body first places the oil pipe in the main bearing groove, and then applies appropriate clamping force to the arched clamps on both sides using a special tool, causing them to elastically deform and cover the outer surface of the oil pipe. After installation, the clamp is connected to the mounting point on the frame through the disc-shaped base. The rubber material inside the base can effectively attenuate the vibration transmission from the frame. The entire clamp system achieves reliable fixation of the oil pipe and vibration suppression through the synergistic effect of mechanical clamping and elastic support.

[0051] Multiple temperature sensing units 2 are disposed on the inner side wall of the clamp body 1.

[0052] Furthermore, multiple grooves are provided on the bottom inner side of the clamp body 1, and multiple temperature sensing units 2 are embedded in these grooves.

[0053] Specifically, multiple temperature sensing units are arranged in a distributed array on the inner wall of the clamp body, forming a complete temperature monitoring network; these temperature sensing units can use negative temperature coefficient thermistors as temperature sensing elements, and their resistance values ​​change with temperature as follows:

[0054]

[0055] in This indicates that the thermistor operates at a temperature of The resistance value at that time, This represents the theoretical resistance value as the temperature approaches infinity. The material constants of a negative temperature coefficient thermistor are... This is an absolute temperature value;

[0056] Multiple rectangular grooves are precision-machined into the inner bottom of the clamp body. The depth of the grooves is designed to be 0.8 to 0.9 times the thickness of the temperature sensing unit, and the width is greater than the outer dimensions of the element, forming a transition fit structure. Each temperature sensing unit is embedded in its corresponding groove and fixed and electrically insulated by epoxy resin potting material. The groove array is arranged at equal intervals along the clamp axis, and the center distance between adjacent grooves can be determined by the following relationship:

[0057]

[0058] in Indicates the center distance of the grooves. Indicates the total length of the clamp. Indicates the total number of temperature sensing units;

[0059] The space between the temperature sensing unit and the recessed substrate is filled with a highly thermally conductive silicone grease, whose thermal conductivity is [missing information]. satisfy This ensures that heat is efficiently conducted from the pipe wall through the clamp body to the sensitive area of ​​the sensing unit; each temperature sensing unit is connected to the signal acquisition module through a parallel circuit, and this connection architecture ensures that the system can still maintain some monitoring functions when a single component fails.

[0060] During temperature data acquisition, each sensing unit independently detects the surface temperature of the oil pipe at its corresponding location and outputs a corresponding resistance signal. The system uses a weighted average algorithm to calculate the overall temperature value, the specific formula of which is:

[0061]

[0062] in This represents the weighted average temperature. Indicates the first The temperature value detected by each temperature sensing unit Indicates the first The weighting coefficient of each sensing unit is determined based on the positional distribution of each sensing unit along the clamp axis, with sensing units located in the high-temperature region of the oil pipe being assigned a higher weight.

[0063] The spatial arrangement density of the temperature sensing units is optimized based on the theory of heat conduction, and the spacing Δx between adjacent units satisfies the following relationship:

[0064]

[0065] in Indicates the distance between adjacent sensing units. This represents the thermal diffusivity of the tubing material. This indicates the required temperature response time of the system; this relationship ensures that the temperature monitoring system can promptly capture changes in the temperature gradient on the surface of the oil pipe.

[0066] In an optional embodiment, the temperature sensing unit may be a thin-film platinum resistance element, whose resistance-temperature characteristics satisfy:

[0067]

[0068] in Indicates temperature The resistance value at that time, This represents the reference resistance value at 0°C. and These are the characteristic constants of platinum resistance material; the electrical connections of each component are achieved through flexible printed circuits, effectively reducing the number of connecting wires and improving system reliability;

[0069] During system operation, multiple temperature sensing units synchronously collect temperature data, which is then transmitted to the processing circuit via a signal transmission unit. When the temperature value at any measuring point exceeds a preset threshold, the system activates a tiered early warning mechanism. This distributed temperature measurement structure enhances the system's fault tolerance through spatial redundancy design, while also improving the representativeness of the monitoring results through the fusion processing of multi-point temperature data.

[0070] The installation process of the temperature sensing unit includes multiple steps such as cleaning the groove base, applying thermal conductive medium, accurately placing the sensing unit, pouring encapsulation material, and curing. The surface of the installed sensing unit is flush with the inner wall of the clamp body to avoid interference with the oil pipe installation. The entire temperature monitoring system verifies the working status of each sensing unit through a periodic self-test procedure to ensure the reliability of long-term monitoring.

[0071] Multiple thermally conductive pads 3 cover the outer side of the temperature sensing surface of the temperature sensing unit 2 and protrude from the inner wall surface of the clamp body 1.

[0072] Furthermore, the thermally conductive pad 3 is an arc-shaped pad, which is filled between the temperature sensing unit 2 and the inner wall of the clamp body 1.

[0073] Specifically, multiple thermal pads are correspondingly placed on the outer side of the temperature sensing surface of each temperature sensing unit to form a complete heat conduction path. These thermal pads are made of elastic silicone material, and their curved surfaces match the outline of the temperature sensing unit to ensure a tight fit of the heat conduction interface.

[0074] In its natural state, the thermally conductive pad protrudes from the inner wall surface of the clamp body. This protrusion design ensures that during clamp installation, the thermally conductive pad can preferentially contact the outer surface of the oil pipe and undergo moderate compression deformation. When the clamp covers the oil pipe, the thermally conductive pad undergoes elastic deformation under the fastening force of the clamp body. The rebound force generated by this compression deformation ensures that the pad and the outer surface of the oil pipe maintain a continuous close contact. By selecting silicone material, it is ensured that heat can be efficiently transferred to the temperature sensing unit.

[0075] First, a thermally conductive adhesive is coated on the surface of the temperature sensing unit. Then, the thermally conductive pad is precisely aligned and pressed together. Finally, permanent fixation is achieved through the structural constraints of the clamp body.

[0076] During operation, temperature changes in the oil inside the tubing are conducted through the tubing wall to the heat-conducting pad; the heat-conducting pad then transfers heat from the contact surface to the temperature sensing unit, whose thermal response time constant... satisfy:

[0077]

[0078] in This indicates the density of the thermal pad material. Indicates the specific heat capacity of a material. This indicates the gasket thickness; by optimizing these parameters, the thermal response time can be controlled within the system's required range.

[0079] In an optional embodiment, the thermally conductive pad can adopt a multi-layer composite structure, with an inner layer of flexible graphite with high thermal conductivity and an outer layer of elastic silicone protective layer. This composite structure ensures both heat conduction efficiency and provides the necessary elastic compression performance. The layers are firmly bonded together through a hot-pressing process to ensure that delamination will not occur during long-term use.

[0080] The installation process of the thermal conductive pad includes four main steps: surface cleaning, adhesive application, pad positioning, and pressure curing. In the surface cleaning stage, it is necessary to ensure that the surface of the temperature sensing unit and the contact surface of the pad meet specific cleanliness standards. The adhesive application adopts a screen printing process to ensure uniform thickness.

[0081] The installed thermally conductive pad forms a smooth transition with the inner wall of the clamp body, avoiding sharp edges or protrusions. During long-term use, the elastic properties of the thermally conductive pad can compensate for dimensional changes caused by temperature cycling, maintaining a stable thermal contact state. The entire heat conduction system ensures the accuracy and reliability of temperature monitoring by regularly checking the physical condition of the thermally conductive pad.

[0082] The signal transmission unit 5 is electrically connected to multiple temperature sensing units 2 and is fixedly connected inside the clamp body 1.

[0083] Furthermore, the signal transmission unit 5 includes a cable 4, one end of which is electrically connected to the temperature sensing unit 2, and the other end of which is electrically connected to an electrical connector.

[0084] Furthermore, the signal transmission unit 5 also includes a microcontroller and a CAN bus transceiver. The microcontroller is configured to receive signals from the signal processing circuit and generate message data conforming to the CAN protocol.

[0085] Specifically, the signal transmission unit establishes an electrical connection with multiple temperature sensing units through internal circuitry and is fixedly installed in the internal cavity of the clamp body; the unit adopts a modular design, including a signal acquisition module, a data processing module, and a communication interface module, and the modules are electrically interconnected through printed circuit boards;

[0086] The signal transmission unit includes a multi-core shielded cable, with two cores used for power transmission and the other two cores used for differential signal transmission. One end of the cable is directly connected to the pin of the temperature sensing unit by soldering, and the solder joint is protected by silicone encapsulation. The other end is connected to a waterproof electrical connector. The cable is fixed in a dedicated cable tray inside the clamp body to avoid interference with moving parts.

[0087] The signal transmission unit integrates a microcontroller and a CAN bus transceiver to form the core processing system; the microcontroller acquires the analog signal from the temperature sensing unit through an analog-to-digital conversion channel, and the conversion resolution satisfies the following relationship:

[0088]

[0089] in Voltage equivalent representing a digital quantity. Indicates the reference voltage. Indicates the number of bits in the analog-to-digital converter;

[0090] The microcontroller performs digital filtering on the collected temperature data, using a moving average algorithm:

[0091]

[0092] in Indicates the first Secondary filter output value Indicates the first Second sample value, This indicates the sampling window size; this processing effectively suppresses random interference during the measurement process.

[0093] The CAN bus transceiver encapsulates the processed temperature data into standard data frames, with identifier assignment following the following rules:

[0094] in Represents the system's basic identifier. Indicates the node address offset;

[0095] During system operation, the microcontroller reads data from each temperature sensing unit according to a preset sampling period. According to the Nyquist sampling theorem:

[0096]

[0097] in This represents the highest frequency component in the temperature signal; the collected data is stored in an internal buffer after scaling transformation.

[0098] In an optional implementation, the signal transmission unit may integrate a temperature compensation circuit, whose output correction value Calculated by the following formula:

[0099]

[0100] in Indicates ambient temperature. Indicates reference temperature. , This is the compensation coefficient; this compensation effectively eliminates the influence of ambient temperature changes on measurement accuracy.

[0101] The installation structure of the signal transmission unit adopts a shockproof design, with rubber shock-absorbing pads placed between the circuit board and the clamp body; the power input terminal is equipped with an overvoltage protection circuit to ensure normal operation when the vehicle's electrical system fluctuates; all electronic components are treated with a moisture-proof coating to improve reliability in harsh environments.

[0102] The entire signal transmission system monitors the working status of each module through a periodic self-diagnostic program. When a communication or data abnormality is detected, a corresponding error flag is set in the CAN message. This design ensures the integrity and reliability of temperature monitoring data, providing accurate oil temperature status information for the vehicle control system.

[0103] Furthermore, it also includes a signal processing circuit, which is set on the clamp body 1 or integrated inside the signal transmission unit 5. The input end of the signal processing circuit is electrically connected to the temperature sensing unit 2, and the output end is electrically connected to the signal transmission unit 5.

[0104] Specifically, the signal processing circuit can be set in a dedicated mounting area on the surface of the clamp body, or directly integrated into the signal transmission unit to form an integrated structure; the circuit establishes a stable electrical connection with multiple temperature sensing units through flexible printed circuits to form a complete signal acquisition and processing link.

[0105] The input of the signal processing circuit is equipped with a multi-channel analog switch, which uses time-division multiplexing technology to sequentially select each temperature sensing channel; the input stage is designed with an electromagnetic compatibility protection circuit, including transient voltage suppression devices and RC filter networks, which can effectively suppress common-mode interference and transient pulses in the field environment; the signal conditioning module adopts an instrumentation amplifier architecture to amplify the weak signal output by the temperature sensing unit to a level range suitable for subsequent processing.

[0106] The conditioned analog signal is sent to the analog-to-digital converter module, which uses a successive approximation converter to convert the analog quantity into a digital quantity according to the set sampling rate. During the conversion process, a stable reference is provided by a reference voltage source to ensure that the quantization accuracy meets the system requirements. The converted digital signal is sent to the digital processing unit, which executes a digital filtering algorithm to eliminate the influence of random noise during the measurement process.

[0107] In an optional implementation, the digital processing unit employs moving average filtering technology to smooth the sampled data sequence; simultaneously, the unit also implements sensor nonlinearity compensation function, correcting the characteristic curve of the temperature sensing unit through a combination of table lookup and interpolation calculation; the parameter table used for correction is loaded from non-volatile memory during system initialization.

[0108] The signal processing circuit also includes a temperature compensation unit, which monitors changes in ambient temperature in real time and dynamically corrects the measurement results; the compensation parameters are pre-calibrated according to the characteristics and installation position of the temperature sensing unit and stored in the memory of the circuit board; the output stage is configured with a level conversion circuit to adjust the processed signal to a level standard that matches the microcontroller interface.

[0109] In terms of circuit layout, when the signal processing circuit is set up independently, it is fixed to the heat dissipation area of ​​the clamp body with thermally conductive adhesive and connected to the signal transmission unit through connectors; when an integrated solution is adopted, all circuit components are arranged on the same printed circuit board of the signal transmission unit and exchange data through an internal bus; both implementation schemes use silicone potting process to improve the reliability of the circuit in vibration environment and enhance moisture resistance.

[0110] During the system power-on initialization phase, the signal processing circuit automatically executes a self-test procedure, including reference voltage calibration, amplifier bias detection, and memory verification. Any abnormal state will be reported to the main control system through a preset error code. Under normal operating conditions, the temperature data from each channel is amplified, filtered, converted from analog to digital, and processed digitally before being transmitted to the signal transmission unit in real time via a parallel or serial interface. The entire signal processing flow is completed under strict time sequence control to ensure the accuracy and real-time performance of temperature data acquisition.

[0111] Figure 3 This is a flowchart of an oil temperature monitoring method provided by one or more embodiments of the present invention.

[0112] Figure 4 This is a schematic diagram of the oil temperature judgment logic of an oil temperature monitoring method provided in one or more embodiments of the present invention.

[0113] like Figures 3-4 One oil temperature monitoring method shown includes:

[0114] The clamp body 1 is wrapped around the surface of the steering hydraulic oil pipe, and the heat-conducting pad 3 is in contact with the oil pipe wall; and the clamp body 1 is fixed on the oil pipe support.

[0115] Establish a connection between signal transmission unit 5 and vehicle ECU;

[0116] The temperature sensing unit 2 acquires an electrical signal characterizing the oil pipe temperature, and the signal transmission unit 5 sends the electrical signal to the ECU.

[0117] In the ECU, the temperature value corresponding to the electrical signal is compared with a preset threshold stored in the memory. If the temperature value is greater than the preset threshold, a warning is triggered.

[0118] Specifically, the oil temperature monitoring method first performs the clamp installation process, which involves wrapping the clamp body around the outer surface of the steering hydraulic oil pipe, applying a predetermined torque using a special installation tool to cause the arched clamp plate to elastically deform, ensuring that the heat-conducting pad forms a tight contact with the outer wall of the oil pipe; the bottom disc base of the clamp body is fixedly connected to the oil pipe bracket on the vehicle frame through a bolt assembly, and a torque wrench is used during the installation process to control the tightening torque within the specified range;

[0119] After the mechanical installation is completed, the electrical system is connected. The waterproof connector of the signal transmission unit is plugged into the corresponding interface of the vehicle wiring harness and locked to establish a physical connection with the vehicle ECU. The ECU confirms the reliability of the connection by detecting the circuit impedance. When the effective load is identified, the communication handshake protocol is initiated to establish a data communication link.

[0120] During the temperature monitoring phase, multiple temperature sensing units continuously collect the surface temperature of the oil pipe through a thermally conductive pad, converting the physical quantity of temperature into a corresponding electrical signal. The signal transmission unit polls each sensing channel at a fixed sampling period. The collected raw data is amplified, filtered, and converted from analog to digital by the local signal processing circuit. The processed digital signal is sent to the ECU via the CAN bus. The data transmission follows the vehicle network communication protocol, and the message identifier contains device address information and data validity verification.

[0121] After receiving the temperature data, the ECU executes a data processing flow. First, it verifies the validity of the raw data and removes abnormal values ​​that exceed the reasonable range. The verified data is sent to a digital filter for smoothing to eliminate fluctuations caused by random interference. The processed temperature value is compared with a preset threshold stored in a non-volatile memory. This threshold is set according to the working temperature characteristics of the hydraulic oil and includes critical values ​​corresponding to multiple warning levels.

[0122] When the monitored temperature exceeds the preset threshold, the ECU triggers the warning execution program and sends a warning command to the instrument panel control unit via the CAN bus. The instrument panel activates the corresponding audible and visual alarm device according to the warning level, and can also display specific warning information and handling suggestions on the multi-function display screen. The system also records the occurrence time, duration and peak temperature of the over-temperature event, and stores this data in the fault memory for subsequent diagnostic analysis.

[0123] In an optional implementation, the ECU can perform a temperature trend analysis function, calculating the rate of change by comparing temperature data from consecutive sampling periods; when a sharp rise in temperature is detected, an early warning can be issued even if the preset threshold is not reached; the system also supports remote monitoring, sending key temperature data to the monitoring center through the vehicle's telematics system.

[0124] The entire monitoring system operates continuously during vehicle operation. The ECU periodically performs self-diagnosis on the temperature monitoring system, checking the rationality of sensor readings, the integrity of communication links, and the effectiveness of early warning functions. When a system abnormality is detected, a system maintenance prompt is displayed on the instrument panel to ensure the reliability of temperature monitoring. This method achieves real-time monitoring and early warning of steering hydraulic oil temperature through a complete process of mechanical installation, signal acquisition, data transmission, and intelligent early warning.

[0125] Furthermore, acquiring the electrical signal characterizing the tubing temperature through the temperature sensing unit 2 includes:

[0126] Multiple temperature sensing units 2 distributed along the axial direction of the clamp body 1 are used to synchronously acquire initial temperature signals at multiple different locations.

[0127] In the signal processing circuit of the ECU or clamp, multiple initial temperature signals are converted into multiple corresponding temperature sample values;

[0128] The overall temperature value is calculated based on multiple temperature samples.

[0129] Specifically, the temperature sensing unit array synchronously acquires temperature signals from each detection point along the axis based on unified timing control; the acquired raw analog signals are amplified and filtered by the signal conditioning circuit, and then converted into digital temperature sample values ​​by the analog-to-digital converter module.

[0130] The system performs data validity verification on the obtained temperature sampling values, including checking the rationality of the physical range and the rate of change between adjacent cycles; the verified data is sent to the data fusion unit, and corresponding weight coefficients are assigned according to the installation position of each sensing unit, with sensing units located in the high-temperature region in the middle of the oil pipe being given higher weights.

[0131] When calculating the comprehensive temperature value based on the weighted average algorithm, the system analyzes the dispersion of data from each detection point in real time. When the temperature value of a specific detection point deviates from the comprehensive value continuously, the system dynamically adjusts the weight coefficient of that point to reduce the impact of abnormal data on the overall result.

[0132] In an optional implementation, the system can also perform temperature distribution uniformity analysis, and evaluate the distribution characteristics of the axial temperature field of the oil pipe by calculating the standard deviation of the temperature values ​​at each detection point; this parameter, together with the comprehensive temperature value, constitutes the basis for oil temperature condition assessment.

[0133] The processed comprehensive temperature value is sent to the vehicle ECU for subsequent control decisions. Meanwhile, the raw temperature data from each detection point can be selectively stored for subsequent trend analysis and system diagnostics. The entire processing flow is executed cyclically at a fixed time to ensure real-time updates and continuity of monitoring data.

[0134] Furthermore, if the temperature value exceeds a preset threshold, an alarm will be triggered, specifically including:

[0135] Set a first warning threshold and a second warning threshold in the ECU, with the second warning threshold being greater than the first warning threshold;

[0136] If the temperature value is greater than the first warning threshold and less than or equal to the second warning threshold, the control prompting device will execute a first-level warning.

[0137] If the temperature value exceeds the second warning threshold, the control and prompting device will issue a second-level warning.

[0138] Level 1 and Level 2 warnings are presented in different forms.

[0139] Specifically, the ECU's non-volatile memory stores graded warning threshold parameters, including a first warning threshold T1 and a second warning threshold T2, wherein the value of T2 is greater than that of T1. In one possible implementation, T1 can be selected as 100 and T2 can be selected as 110. These threshold parameters are set based on the thermal stability index of hydraulic oil and system safety requirements, and are written by a dedicated diagnostic device before the vehicle leaves the factory.

[0140] When the real-time temperature data obtained by the temperature monitoring system is transmitted to the ECU, the comparison logic unit synchronously performs threshold comparison calculation. First, the input temperature value is compared with T1. If it exceeds T1 but does not reach T2, a first-level warning flag is generated. If it directly exceeds T2, a second-level warning flag is generated. The comparison result is temporarily stored in the status register for the warning execution module to call.

[0141] When the Level 1 warning is triggered, the ECU sends a specific command code to the instrument cluster via the CAN bus. After receiving the command, the instrument control unit drives the yellow indicator light to flash, and at the same time the information display shows a text message prompting "High oil temperature, please pay attention"; at this time, the alarm buzzer remains silent to avoid excessive interference to the driver.

[0142] When a Level 2 warning is triggered, the command code sent by the ECU will activate a higher-level warning combination; the red warning light on the instrument panel will flash rapidly, the information display screen will switch to displaying a warning text for excessive oil temperature and immediate check, and the buzzer will emit an intermittent warning sound; in an optional implementation, the system can also be linked with the vehicle's voice prompt system to broadcast the specific warning content.

[0143] During the warning period, the ECU continuously monitors the temperature change trend; when the temperature drops below the corresponding threshold and remains below it for a predetermined time, the system automatically cancels the warning and restores normal display; if the warning conditions persist, the system will issue warnings repeatedly at fixed intervals to ensure that the driver is continuously aware of the status.

[0144] The system also has a warning event recording function. When any level of warning occurs, the ECU will record parameters such as event type, occurrence time, duration and peak temperature. These data are stored in the fault code memory and can be read through the diagnostic interface for subsequent analysis.

[0145] In an optional implementation, the system can support a remote early warning function. When a level-two early warning is triggered, the warning information is sent to the fleet management system via the vehicle-mounted remote information terminal. This function provides additional monitoring capabilities for commercial vehicle fleet management.

[0146] The entire early warning triggering mechanism operates in a periodic scanning manner, updating temperature data and early warning status in each processing cycle. This design ensures the system's real-time response capability to abnormal oil temperature conditions, while also achieving reasonable differentiation of warning intensity through a graded early warning strategy.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function, characterized in that, The commercial vehicle steering hydraulic line clamp with integrated oil temperature monitoring function includes: The clamp body (1) has a channel on its surface for accommodating the steering hydraulic oil pipe; Multiple temperature sensing units (2) are provided on the inner sidewall of the clamp body (1); Multiple thermally conductive pads (3) are provided, each covering the outer side of the temperature sensing surface of the temperature sensing unit (2) and protruding from the inner wall surface of the clamp body (1). The signal transmission unit (5) is electrically connected to multiple temperature sensing units (2) and is fixedly connected inside the clamp body (1).

2. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, The clamp body (1) is an integrally formed structure. The clamp body (1) has a double-groove cross-section. The clamp body (1) includes a bottom middle and side walls extending upward from both sides of the bottom. The ends of the side walls are bent inward to form an arched clamp plate. A disc-shaped base is provided on the outer side of the bottom of the clamp body (1).

3. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, The inner bottom of the clamp body (1) is provided with multiple grooves, and multiple temperature sensing units (2) are embedded in the grooves.

4. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, The thermally conductive pad (3) is an arc-shaped pad, and the thermally conductive pad (3) is filled between the temperature sensing unit (2) and the inner wall of the clamp body (1).

5. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, The signal transmission unit (5) includes a cable (4), one end of which is electrically connected to the temperature sensing unit (2), and the other end of which is electrically connected to an electrical connector.

6. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, The signal transmission unit (5) further includes a microcontroller and a CAN bus transceiver. The microcontroller is configured to receive signals from the signal processing circuit and generate message data conforming to the CAN protocol.

7. The commercial vehicle steering hydraulic pipeline clamp with integrated oil temperature monitoring function according to claim 1, characterized in that, It also includes a signal processing circuit, which is disposed on the clamp body (1) or integrated inside the signal transmission unit (5). The input end of the signal processing circuit is electrically connected to the temperature sensing unit (2), and the output end is electrically connected to the signal transmission unit (5).

8. A method for monitoring oil temperature, characterized in that, The method for using a commercial vehicle steering hydraulic line clamp with integrated oil temperature monitoring function as described in any one of claims 1-7 includes the following steps: Wrap the clamp body (1) around the surface of the steering hydraulic oil pipe and make the heat-conducting pad (3) contact the oil pipe wall; and fix the clamp body (1) on the oil pipe support; Establish a connection between the signal transmission unit (5) and the vehicle ECU; The temperature sensing unit (2) acquires an electrical signal characterizing the oil pipe temperature and sends the electrical signal to the ECU through the signal transmission unit (5). In the ECU, the temperature value corresponding to the electrical signal is compared with a preset threshold stored in the memory. If the temperature value is greater than the preset threshold, an alarm is triggered.

9. The oil temperature monitoring method according to claim 8, characterized in that, The acquisition of the electrical signal characterizing the oil pipe temperature through the temperature sensing unit (2) includes: Multiple temperature sensing units (2) distributed along the axial direction of the clamp body (1) are used to synchronously acquire initial temperature signals at multiple different locations. In the signal processing circuit of the ECU or the clamp, the plurality of initial temperature signals are converted into the corresponding plurality of temperature sample values; The comprehensive temperature value is calculated based on the multiple temperature sampling values.

10. The oil temperature monitoring method according to claim 8, characterized in that, The step of triggering an early warning when the temperature value exceeds a preset threshold specifically includes: A first warning threshold and a second warning threshold are set in the ECU, wherein the second warning threshold is greater than the first warning threshold; If the temperature value is greater than the first warning threshold and less than or equal to the second warning threshold, the control prompting device will execute a first-level warning. If the temperature value exceeds the second warning threshold, the control and prompting device will issue a second-level warning. The Level 1 and Level 2 warnings are presented in different forms.

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