Novel motor truck scale fault detection system

Abstract

The utility model discloses a novel motor truck scale fault detection system comprising a simulation motor truck scale and a simulation fault generator, and the simulation fault generator comprises a central processor, a signal acquisition module, a fault simulation module, a communication line and a power supply module. The simulated truck scale is used for simulating the working environment of a real truck scale, and each simulation part of the simulated truck scale is electrically connected with the simulated fault generator; the central processing unit is electrically connected with the signal acquisition module and the fault simulation module and is responsible for performing coordination control on each module; the signal acquisition module is used for acquiring a line on-off signal, a sensor resistance signal and an instrument millivolt signal of the truck scale, and the fault simulation module generates a simulation line on-off fault signal, a simulation resistance fault signal and a simulation millivolt fault signal according to an instruction of the central processing unit; the communication line is used for transmitting simulation fault signals, and the power module provides stable power. According to the utility model, various possible faults of the truck scale can be accurately simulated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a truck scale technical field, concretely relates to a novel truck scale fault detection system. BACKGROUND

[0002] As an important weighing equipment, truck scales are widely used in various cargo transportation, industrial production and other fields. In actual use, in order to ensure the normal operation and accurate measurement of truck scales, it is necessary to carry out periodic maintenance and fault detection. However, the existing truck scale fault detection means often relies on maintenance and troubleshooting after actual fault occurs, lacks effective simulation fault generation device, and thus cannot comprehensively and systematically test the performance of truck scales.

[0003] Traditional truck scale fault detection methods mainly include manual inspection and sensor detection, which have low efficiency and poor accuracy. At the same time, due to the complex structure of truck scales and various types of faults, it is difficult to accurately simulate and detect various faults. Therefore, the above problems need to be solved. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a novel truck scale fault detection system, which provides an environment simulating real truck scale faults, can accurately simulate various possible faults of truck scales, and helps technicians to fully understand the situation of truck scales under different fault conditions.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model relates to a novel truck scale fault detection system, which has the following innovative points: it comprises a simulated truck scale and a simulated fault generator, and the simulated fault generator comprises a central processing unit, a signal acquisition module, a fault simulation module, a communication line and a power module; the simulated truck scale is used to simulate the working environment of a real truck scale, and each simulated part thereof is electrically connected to the simulated fault generator; the central processing unit is electrically connected to the signal acquisition module and the fault simulation module as a core component, and is responsible for coordinating and controlling each module; the signal acquisition module is used to acquire the line on-off signal, sensor resistance signal and instrument millivolt signal of the truck scale, and the fault simulation module generates simulated line on-off fault signal, simulated resistance fault signal and simulated millivolt fault signal according to the instructions of the central processing unit; the communication line is used to transmit various simulated fault signals, and the power module provides stable power supply for the whole system.

[0006] Preferably, the simulation truck scale comprises a simulated weighing platform, a weighing sensor, a junction box, a line, an external power supply and a display instrument; a weighing sensor for measuring weight is further installed at the bottom of the weighing platform, and the weighing sensor is connected with the junction box through a line and is electrically connected with the simulation fault generator; the junction box is connected with the display instrument through a line, and the junction box is electrically connected with the simulation fault generator; the display instrument is connected with the external power supply and is electrically connected with the simulation fault generator; and the line is electrically connected with the simulation fault generator.

[0007] Preferably, the central processor is an embedded processor, and the model thereof is XL32F003S8; the central processor can receive external instructions through a pre-written control program and send accurate control signals to the fault simulation module according to the instructions.

[0008] Preferably, the signal acquisition module comprises an optical coupler, a resistance measurement chip, an amplifier, a filter and an A / D converter; the optical coupler is used for acquiring the on-off signal of the line of the truck scale; the resistance measurement chip is used for acquiring the resistance signal of the sensor and judging whether the simulated resistance fault signal occurs through real-time monitoring of the resistance value; the amplifier, the filter and the A / D converter are electrically connected in sequence, and the weak millivolt signal output by the display instrument is amplified and filtered through the amplifier and the filter for pretreatment, and then the A / D converter converts the signal into a digital quantity, and the working state of the display instrument is read and analyzed through the central processor to judge whether the simulated millivolt fault signal occurs.

[0009] Preferably, the model of the optical coupler is KL357 triode optical coupler, and the optical coupler outputs a high-level signal when the line is disconnected and transmits the signal to the central processor for judgment and recording.

[0010] Preferably, the model of the resistance measurement chip is PCF8591 resistance measurement chip, and the resistance measurement chip accurately measures the resistance value of the weighing sensor and transmits the value to the central processor in the form of a digital signal through an I2C interface.

[0011] Preferably, the amplifier and the filter adopt a MAX262 module, and the module integrates the functions of amplification and filtering; and the model of the A / D converter is a high-precision ADC080 A / D converter.

[0012] Preferably, the fault simulation module comprises a relay, a programmable resistance core and a DA chip; the relay adopts a type of SRD-05VDC-SL-C relay, and the connection of the truck scale line is cut off by the disconnection of the relay to simulate the fault phenomenon of line disconnection; the programmable resistance core adopts a MAX5438 programmable resistance chip, and the programmable resistance value is accurately controlled through a digital interface, so that the output is similar to the resistance value when the truck scale sensor fails, and the sensor resistance fault phenomenon is simulated; the DA chip adopts a DAC084S085CIMMX / NOPB digital-to-analog converter chip, and the digital signal sent by the central processing unit is converted into an analog millivolt fault signal and output to the input end of the truck scale display instrument, and the millivolt fault signal of the instrument is simulated.

[0013] Preferably, the communication line selects an RS485 bus for transmitting signals and data among the central processing unit, the signal acquisition module and the fault simulation module.

[0014] Preferably, the power module selects a 5-24V alternating current power supply for providing stable power supply for the whole system.

[0015] The beneficial effects of the utility model are as follows:

[0016] (1) The utility model provides a kind of environment simulating real truck scale failure, can accurately simulate various faults that may appear to truck scale, help technical personnel to comprehensively understand the situation of truck scale under different fault states;

[0017] (2) The utility model can find the problems existing in truck scale in time by simulating failure in advance, avoid greater damage to equipment after failure occurs, to reduce maintenance cost;

[0018] (3) The utility model can help enterprise to formulate more reasonable maintenance plan and strategy by simulating failure to analyze the fault situation and fault difficulty of truck scale, such as reserving easy-to-damage parts in advance, reasonably arranging preventive maintenance, to reduce maintenance cost and equipment failure rate. DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment will be simply introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is the principle diagram of a kind of new truck scale fault detection system of the utility model.

[0021] Figure 2 This is a schematic diagram of the structural principle of the simulated fault generator of this utility model.

[0022] Among them, 1-simulated fault generator; 2-weighing platform; 3-weighing sensor; 4-junction box; 5-line; 6-display instrument; 7-external power supply. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0024] This utility model discloses a novel truck scale fault detection system, comprising a simulated truck scale and a simulated fault generator 1. The simulated fault generator 1 includes a central processing unit, a signal acquisition module, a fault simulation module, a communication line, and a power supply module; specifically as follows: Figure 1 , Figure 2 As shown, the simulated truck scale is used to simulate the working environment of a real truck scale, and each of its simulation components is electrically connected to the simulated fault generator 1. The central processing unit, as the core component, is electrically connected to the signal acquisition module and the fault simulation module, and is responsible for coordinating and controlling each module. The signal acquisition module is used to acquire the line continuity signal, sensor resistance signal, and instrument millivolt signal of the truck scale, and the fault simulation module generates simulated line continuity fault signal, simulated resistance fault signal, and simulated millivolt fault signal according to the instructions of the central processing unit. The communication line is used to transmit various simulated fault signals, and the power supply module provides a stable power supply for the entire system.

[0025] The simulated truck scale includes a simulated weighing platform 2, weighing sensors 3, a junction box 4, wiring, an external power supply 7, and a display instrument 6; such as Figure 1 , Figure 2 As shown, a weighing sensor 3 for measuring weight is also installed at the bottom of the weighing platform 2, and the weighing sensor 3 is connected to the junction box 4 via line 5 and electrically connected to the simulated fault generator 1; the junction box 4 is connected to the display instrument 6 via line 5 and electrically connected to the simulated fault generator 1; the display instrument 6 is connected to the external power supply 7 and electrically connected to the simulated fault generator 1; line 5 is electrically connected to the simulated fault generator 1.

[0026] like Figure 1 , Figure 2As shown, the central processor selects an embedded processor, and the model thereof is XL32F003S8, which has strong computing capacity and rich interface resources, can efficiently process various digital signals and integrates multiple I2C, SPI, USART and other communication peripheral interfaces, and can meet the real-time coordination control requirements of the entire analog fault generator 1.

[0027] The utility model discloses a signal acquisition module includes photo coupler, resistance measuring chip, amplifier, filter and AD converter, as Figure 1 、 Figure 2 As shown, the photo coupler is used for collecting the line on-off signal of the truck scale;The resistance measuring chip is used for collecting the sensor resistance signal, and judges whether the analog resistance fault signal occurs through real-time monitoring of the resistance value;The amplifier, filter and A / D converter are electrically connected in sequence, and the weak millivolt signal output by the display instrument 6 is amplified and filtered pretreated through the amplifier and filter, then converted into digital quantity by the A / D converter, and the working state of the display instrument 6 is read and analyzed through the central processor to judge whether the analog millivolt fault signal occurs.

[0028] As shown in Figure 1 、 Figure 2 The model of the photo coupler is KL357 triode photo coupler, and it outputs high level signal when the line is disconnected, and is transmitted to the central processor for judgment and record. The model of the resistance measuring chip is PCF8591 resistance measuring chip, and it accurately measures the resistance value of the weighing sensor 3 and transmits it to the central processor in the form of digital signal through I2C interface. The amplifier and filter select MAX262 module, and they integrate the functions of amplification and filtering;The model of the A / D converter is high-precision ADC080 A / D converter.

[0029] The utility model discloses a fault simulation module including relay, programmable resistance core and DA chip, as Figure 1 、 Figure 2As shown in the figure, the type of relay adopted is SRD-05VDC-SL-C type relay, and the connection of the truck scale line is cut off by opening it, simulating the fault phenomenon of line circuit breaking, when it is needed to restore the normal state of the line, the relay closes again, making the line reconnected, that is, the common end and the normally open end form a normally open switch, and the common end and the normally closed end form a normally closed switch. The programmable resistance core adopts MAX5438 programmable resistance chip, and its resistance value can be accurately controlled by digital interface programming, so that the output is similar to the resistance value when the truck scale sensor fails, and the sensor resistance fault phenomenon is simulated. The DA chip adopts DAC084S085CIMMX / NOPB digital analog converter chip, and it converts the digital signal sent by the central processing unit into an analog millivolt fault signal, and outputs to the input end of the truck scale display instrument 6, and then simulates the instrument millivolt fault signal.

[0030] As shown in Figure 1 , Figure 2 , the communication line selects RS485 bus, which is used for transmitting signals and data between the central processing unit, the signal acquisition module and the fault simulation module.

[0031] As shown in Figure 1 , Figure 2 , the power module selects 5-24V AC power supply, which is used for providing stable power supply for the whole system.

[0032] The utility model discloses first the function test of each module is alone, ensures that signal acquisition module can accurately gather various truck scale signals, fault simulation module can generate correct simulation fault signal according to the instruction of central processing unit, and communication line can stably and reliably transmit data, and power module can provide stable power supply. Then the whole system of the system is debugged, that is, different fault simulation instructions are sent to the fault simulation module through the central processing unit, whether the " fault " signal collected by the signal acquisition module is consistent with the expectation is observed at the same time, after repeated debugging and optimization for many times, the simulation fault generator 1 system can stably and accurately simulate various common faults that may appear in the actual use of truck scale, and provides powerful support tool for the fault diagnosis, maintenance training and performance optimization of truck scale.

[0033] The utility model discloses the beneficial effects:

[0034] (1) the utility model provides a kind of environment that simulates real truck scale to occur fault, can accurately simulate various faults that may appear in truck scale, help technician to comprehensively understand the situation of truck scale under different fault state;

[0035] (2) the utility model can find the problem existing in truck scale in time by simulating fault in advance, avoid greater damage to equipment after fault occurs, to reduce maintenance cost;

[0036] (3) The utility model discloses through simulating fault analysis truck scale's fault situation and fault difficulty, can help enterprise to make more reasonable maintenance plan and strategy, for example, advance the reserve perishable spare parts, reasonable arrangement preventive maintenance etc., thereby reduced maintenance cost and equipment failure rate.

[0037] The above-described embodiments are merely preferred embodiments of the utility model, and do not limit the design concept and scope of the utility model, and various modifications and improvements to the technical scheme of the utility model made by the ordinary engineering technical personnel in the art without departing from the design concept of the utility model shall fall within the protection scope of the utility model, and the technical content of the utility model claimed for protection has been entirely recorded in the technical requirements.

Claims

1. A novel truck scale fault detection system characterized by: The simulation truck scale comprises a simulation truck scale and a simulation fault generator, and the simulation fault generator comprises a central processing unit, a signal acquisition module, a fault simulation module, a communication line and a power supply module; the simulation truck scale is used for simulating the working environment of a real truck scale, and each simulation part thereof is electrically connected with the simulation fault generator; the central processing unit is electrically connected with the signal acquisition module and the fault simulation module as a core component, and is responsible for coordinated control of each module; the signal acquisition module is used for acquiring the line on-off signal, the sensor resistance signal and the instrument millivolt signal of the truck scale, and the fault simulation module generates the simulation line on-off fault signal, the simulation resistance fault signal and the simulation millivolt fault signal according to the instruction of the central processing unit; the communication line is used for transmitting various simulation fault signals, and the power supply module provides stable power supply for the whole system.

2. A new type of fault detection system for a truck scale according to claim 1, characterized in that: The simulation truck scale comprises a simulation weighing platform, a weighing sensor, a junction box, a line, an external power supply and a display instrument; a weighing sensor for measuring weight is further installed at the bottom of the weighing platform, and the weighing sensor is connected with the junction box through a line and is electrically connected with the simulation fault generator; the junction box is connected with the display instrument through a line, and the junction box is electrically connected with the simulation fault generator; the display instrument is connected with the external power supply and is electrically connected with the simulation fault generator; the line is electrically connected with the simulation fault generator.

3. A new type of fault detection system for a truck scale as claimed in claim 1, characterized in that: The central processing unit selects an embedded processor, and the model thereof is XL32F003S8; the central processing unit can receive external instructions and send accurate control signals to the fault simulation module according to the instructions through a pre-written control program.

4. The novel fault detection system for a truck scale as claimed in claim 1, wherein: The signal acquisition module comprises an optical coupler, a resistance measurement chip, an amplifier, a filter and an A / D converter; the optical coupler is used for acquiring the line on-off signal of the truck scale; the resistance measurement chip is used for acquiring the sensor resistance signal and judging whether the simulation resistance fault signal occurs through real-time monitoring of the resistance value; the amplifier, the filter and the A / D converter are electrically connected in sequence, and the weak millivolt signal output by the display instrument is amplified and filtered through the amplifier and the filter for pretreatment, and then the A / D converter converts the signal into a digital quantity, and the working state of the display instrument is read and analyzed through the central processing unit to judge whether the simulation millivolt fault signal occurs.

5. A novel fault detection system for a truck scale as claimed in claim 4, wherein: The model of the optical coupler is a KL357 triode optical coupler, and it outputs a high-level signal when the line is disconnected and the signal is transmitted to the central processing unit for judgment and recording.

6. A novel fault detection system for a truck scale as claimed in claim 4, wherein: The model of the resistance measurement chip is a PCF8591 resistance measurement chip, and it accurately measures the resistance value of the weighing sensor and transmits the digital signal to the central processing unit through an I2C interface.

7. A novel fault detection system for a truck scale as claimed in claim 4, wherein: The amplifier and the filter select a MAX262 module, and they integrate the functions of amplification and filtering; the model of the A / D converter is a high-precision ADC080 A / D converter.

8. A new type of fault detection system for a truck scale as claimed in claim 1, characterized in that: The fault simulation module comprises a relay, a programmable resistance core and a DA chip; the relay adopts a type of SRD-05VDC-SL-C relay, and the connection of the truck scale line is cut off by the disconnection of the relay to simulate the fault phenomenon of line disconnection; the programmable resistance core adopts a MAX5438 programmable resistance chip, and the resistance value can be controlled accurately by the digital interface, so that the output is similar to the resistance value when the truck scale sensor fails, and then the sensor resistance fault phenomenon is simulated; the DA chip adopts a DAC084S085CIMMX / NOPB digital-analog converter chip, and the digital signal sent by the central processing unit is converted into an analog millivolt fault signal, and output to the input end of the truck scale display instrument, and then the instrument millivolt fault signal is simulated.

9. A new type of fault detection system for a truck scale as claimed in claim 1, characterized in that: The communication line selects an RS485 bus for transmitting signals and data among the central processing unit, the signal acquisition module and the fault simulation module.

10. A new type of fault detection system for a truck scale as claimed in claim 1, characterized in that: The power module selects a 5-24V AC power supply for providing stable power supply for the whole system.

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