Intelligent detection device for axle counting signal source equipment

Abstract

The application discloses a kind of intelligent detection device for axle counter signal source equipment, including power module, main control MCU module, first signal acquisition module, second signal acquisition module, third signal acquisition module, fourth signal acquisition module, FSK signal acquisition module and coil resistance acquisition module.The setting of first signal acquisition module, second signal acquisition module, third signal acquisition module, fourth signal acquisition module, FSK signal acquisition module and coil resistance acquisition module realizes the intelligent collection of the sending signal and receiving signal of wheel sensor pair in axle counter signal source equipment, the FSK signal sent by axle detector and the resistance characteristic parameter of each coil in wheel sensor pair, the amplitude, frequency and resistance calculation of combination main control MCU module and the comparison with preset reference value, according to each comparison result detection personnel can quickly confirm the performance state and fault point of the axle counter signal source equipment under test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rail transit detection equipment, and particularly relates to an intelligent detection device for an axle counting signal source equipment. BACKGROUND

[0002] At present, axle counting equipment is widely used in the fields of national railways, local railways, urban rails, straddle-type monorails, cloud rails and suspended air rails. The axle counting signal source equipment placed outdoors includes a first wheel sensor sending side, a first wheel sensor receiving side, a second wheel sensor sending side, a second wheel sensor receiving side and a wheel axle detector. The wheel axle detector is used to generate an FSK signal, which is a composite frequency signal. The wheel sensor pair composed of the first wheel sensor and the second wheel sensor and the wheel axle detector are important components of the axle counting equipment and jointly complete the detection of the train wheel axle. Since the axle counting signal source equipment is installed outdoors, the use environment is complex, and component failures are prone to occur. In addition, the axle counting signal source equipment contains a wheel sensor pair and multiple boards, so there are many points that may fail. At present, the electrical parameters at each interface of the axle counting signal source equipment are measured by a multimeter to preliminarily judge the fault type. Since the function of the multimeter is very limited, only part of the interface parameters can be detected, and the fault point cannot be accurately and effectively located. In addition, there are many types of electrical parameters to be detected, and the corresponding reference values of each electrical parameter are also complex, which requires higher detection personnel. Therefore, it is difficult to troubleshoot the axle counting signal source equipment, and the fault handling time is long, which affects the normal operation of rail transit. Therefore, a convenient and rapid performance detection scheme for the axle counting signal source equipment is urgently needed. SUMMARY

[0003] The present application aims to overcome one or more shortcomings of the prior art and provide an intelligent detection device for an axle counting signal source equipment.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] An intelligent detection device for an axle counting signal source equipment, comprising a power supply module, a main control MCU module, a first signal acquisition module, a second signal acquisition module, a third signal acquisition module, a fourth signal acquisition module and an FSK signal acquisition module.

[0006] The power supply module is used to generate a first reference voltage and send the first reference voltage to the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module and the FSK signal acquisition module.

[0007] The first signal acquisition module is configured to acquire a first voltage signal output by a sending side of the first wheel sensor, perform ADC conversion on the first voltage signal based on a first reference voltage, and then send the converted first voltage signal to the master MCU module.

[0008] The second signal acquisition module is configured to acquire a second voltage signal output by a sending side of the second wheel sensor, perform ADC conversion on the second voltage signal based on the first reference voltage, and then send the converted second voltage signal to the master MCU module.

[0009] The third signal acquisition module is configured to acquire a third voltage signal received by a receiving side of the first wheel sensor, perform ADC conversion on the third voltage signal based on the first reference voltage, and then send the converted third voltage signal to the master MCU module.

[0010] The fourth signal acquisition module is configured to acquire a fourth voltage signal received by a receiving side of the second wheel sensor, perform ADC conversion on the fourth voltage signal based on the first reference voltage, and then send the converted fourth voltage signal to the master MCU module.

[0011] The FSK signal acquisition module is configured to acquire an FSK signal output by the wheel shaft detector, perform ADC conversion on the FSK signal based on the first reference voltage, and then send the converted FSK signal to the master MCU module.

[0012] The master MCU module is configured to calculate the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, and the amplitude of the fourth voltage signal, and perform frequency division processing on the FSK signal to generate a plurality of FSK division signals, and calculate the frequency values of the FSK division signals, wherein the master MCU module is preconfigured with a plurality of reference values, each reference value corresponding to the first voltage signal, the second voltage signal, the third voltage signal, the fourth voltage signal, and each FSK division signal.

[0013] The master MCU module is configured to compare the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, the amplitude of the fourth voltage signal, and the frequency values of the FSK division signals with the corresponding reference values respectively, and generate a first comparison result.

[0014] Further improvement, the intelligent detection device further comprises a coil resistance acquisition module.

[0015] The coil resistance acquisition module is configured to acquire a resistance characteristic parameter of the first wheel sensor sending side coil, or the first wheel sensor receiving side coil, or the second wheel sensor sending side coil, or the second wheel sensor receiving side coil, and send the resistance characteristic parameter to the master MCU module.

[0016] The master MCU module is further preset with a reference value corresponding to the resistance characteristic parameter.

[0017] The master MCU module is further configured to calculate a coil resistance value according to the resistance characteristic parameter, compare the coil resistance value with the reference value corresponding to the resistance characteristic parameter, and generate a second comparison result.

[0018] Further improvement, the coil resistance acquisition module comprises a first operational amplifier unit and a second operational amplifier unit.

[0019] The non-inverting input terminal of the first operational amplifier unit is connected with the first voltage output terminal of the power module, the inverting input terminal of the first operational amplifier unit is connected with the output terminal of the first operational amplifier unit, and the output terminal of the first operational amplifier unit is further connected with the non-inverting input terminal of the second operational amplifier unit.

[0020] The inverting input terminal of the second operational amplifier unit is configured to be connected with the first end of the first wheel sensor sending side coil, and the ground terminal of the second operational amplifier unit is configured to be connected with the second end of the first wheel sensor sending side coil; or the inverting input terminal of the second operational amplifier unit is configured to be connected with the first end of the first wheel sensor receiving side coil, and the ground terminal of the second operational amplifier unit is configured to be connected with the second end of the first wheel sensor receiving side coil; or the inverting input terminal of the second operational amplifier unit is configured to be connected with the first end of the second wheel sensor sending side coil, and the ground terminal of the second operational amplifier unit is configured to be connected with the second end of the second wheel sensor sending side coil; or the inverting input terminal of the second operational amplifier unit is configured to be connected with the first end of the second wheel sensor receiving side coil, and the ground terminal of the second operational amplifier unit is configured to be connected with the second end of the second wheel sensor receiving side coil.

[0021] The inverting input terminal of the second operational amplifier unit is further connected with the output terminal of the second operational amplifier unit through a first feedback resistor, and the output terminal of the second operational amplifier unit is connected with the first acquisition terminal of the master MCU module.

[0022] Further improved, the first signal acquisition module comprises a third operational amplifier unit and a first ADC conversion unit, the non-inverting input end of the third operational amplifier unit is connected with the positive output end of the first voltage signal output of the first wheel sensor sending side, the inverting input end of the third operational amplifier unit is connected with the negative output end of the first voltage signal output of the first wheel sensor sending side, the non-inverting output end of the third operational amplifier unit is connected with the first input end of the first ADC conversion unit, the inverting output end of the third operational amplifier unit is connected with the second input end of the first ADC conversion unit, the reference voltage end of the first ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the first ADC conversion unit is connected with the second acquisition end of the master control MCU module; the second signal acquisition module comprises a fourth operational amplifier unit and a second ADC conversion unit, the non-inverting input end of the fourth operational amplifier unit is connected with the positive output end of the second voltage signal output of the second wheel sensor sending side, the inverting input end of the fourth operational amplifier unit is connected with the negative output end of the second voltage signal output of the second wheel sensor sending side, the non-inverting output end of the fourth operational amplifier unit is connected with the first input end of the second ADC conversion unit, the inverting output end of the fourth operational amplifier unit is connected with the second input end of the second ADC conversion unit, the reference voltage end of the second ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the second ADC conversion unit is connected with the third acquisition end of the master control MCU module.

[0023] Further improved, the third signal acquisition module comprises a fifth operational amplifier unit and a third ADC conversion unit, the non-inverting input end of the fifth operational amplifier unit is connected with the positive output end of the third voltage signal output of the first wheel sensor receiving side, the inverting input end of the fifth operational amplifier unit is connected with the negative output end of the third voltage signal output of the first wheel sensor receiving side, the non-inverting output end of the fifth operational amplifier unit is connected with the first input end of the third ADC conversion unit, the inverting output end of the fifth operational amplifier unit is connected with the second input end of the third ADC conversion unit, the reference voltage end of the third ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the third ADC conversion unit is connected with the fourth acquisition end of the master control MCU module; the fourth signal acquisition module comprises a sixth operational amplifier unit and a fourth ADC conversion unit, the non-inverting input end of the sixth operational amplifier unit is connected with the positive output end of the fourth voltage signal output of the second wheel sensor receiving side, the inverting input end of the sixth operational amplifier unit is connected with the negative output end of the fourth voltage signal output of the second wheel sensor receiving side, the non-inverting output end of the sixth operational amplifier unit is connected with the first input end of the fourth ADC conversion unit, the inverting output end of the sixth operational amplifier unit is connected with the second input end of the fourth ADC conversion unit, the reference voltage end of the fourth ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the fourth ADC conversion unit is connected with the fifth acquisition end of the master control MCU module.

[0024] Further improvement, the FSK signal acquisition module comprises a seventh operational amplifier unit and a fifth ADC conversion unit, the non-inverting input end of the seventh operational amplifier unit is connected with the positive output end of the FSK signal of the wheel detector, the inverting input end of the seventh operational amplifier unit is connected with the negative output end of the FSK signal of the wheel detector, the non-inverting output end of the seventh operational amplifier unit is connected with the first input end of the fifth ADC conversion unit, the inverting output end of the seventh operational amplifier unit is connected with the second input end of the fifth ADC conversion unit, the reference voltage end of the fifth ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the fifth ADC conversion unit is connected with the sixth acquisition end of the master control MCU module.

[0025] Further improvement, the intelligent detection device further comprises a detection pen and a multiplexing module; the positive electrode of the detection pen is connected with the positive output end of the first voltage signal of the first wheel sensor sending side, or the positive output end of the second voltage signal of the second wheel sensor sending side, or the positive output end of the third voltage signal of the first wheel sensor receiving side, or the positive output end of the fourth voltage signal of the second wheel sensor receiving side, or the positive output end of the FSK signal of the wheel detector, or the first end of the coil of the first wheel sensor sending side, or the first end of the coil of the first wheel sensor receiving side, or the first end of the coil of the second wheel sensor sending side, or the first end of the coil of the second wheel sensor receiving side; the negative electrode of the detection pen is connected with the negative output end of the first voltage signal of the first wheel sensor sending side, or the negative output end of the second voltage signal of the second wheel sensor sending side, or the negative output end of the third voltage signal of the first wheel sensor receiving side, or the negative output end of the fourth voltage signal of the second wheel sensor receiving side, or the negative output end of the FSK signal of the wheel detector, or the second end of the coil of the first wheel sensor sending side, or the second end of the coil of the first wheel sensor receiving side, or the second end of the coil of the second wheel sensor sending side, or the second end of the coil of the second wheel sensor receiving side;

[0026] The multiplexing module is used for connecting or disconnecting the positive electrode of the detection probe with the non-inverting input terminal of the third operational amplifier unit, the non-inverting input terminal of the fourth operational amplifier unit, the non-inverting input terminal of the fifth operational amplifier unit, the non-inverting input terminal of the sixth operational amplifier unit, the non-inverting input terminal of the seventh operational amplifier unit and the inverting input terminal of the second operational amplifier unit, and is used for connecting or disconnecting the negative electrode of the detection probe with the inverting input terminal of the third operational amplifier unit, the inverting input terminal of the fourth operational amplifier unit, the inverting input terminal of the fifth operational amplifier unit, the inverting input terminal of the sixth operational amplifier unit, the inverting input terminal of the seventh operational amplifier unit and the ground terminal of the second operational amplifier unit; at the same time, the multiplexing module only connects one of the positive electrode of the detection probe with the non-inverting input terminal of the third operational amplifier unit, the non-inverting input terminal of the fourth operational amplifier unit, the non-inverting input terminal of the fifth operational amplifier unit, the non-inverting input terminal of the sixth operational amplifier unit, the non-inverting input terminal of the seventh operational amplifier unit and the inverting input terminal of the second operational amplifier unit.

[0027] When the multiplexing module connects the positive electrode of the detection probe with the non-inverting input terminal of the third operational amplifier unit, the negative electrode of the detection probe is also connected with the inverting input terminal of the third operational amplifier unit; when the multiplexing module connects the positive electrode of the detection probe with the non-inverting input terminal of the fourth operational amplifier unit, the negative electrode of the detection probe is also connected with the inverting input terminal of the fourth operational amplifier unit; when the multiplexing module connects the positive electrode of the detection probe with the non-inverting input terminal of the fifth operational amplifier unit, the negative electrode of the detection probe is also connected with the inverting input terminal of the fifth operational amplifier unit; when the multiplexing module connects the positive electrode of the detection probe with the non-inverting input terminal of the sixth operational amplifier unit, the negative electrode of the detection probe is also connected with the inverting input terminal of the sixth operational amplifier unit; when the multiplexing module connects the positive electrode of the detection probe with the non-inverting input terminal of the seventh operational amplifier unit, the negative electrode of the detection probe is also connected with the inverting input terminal of the seventh operational amplifier unit; when the multiplexing module connects the positive electrode of the detection probe with the inverting input terminal of the second operational amplifier unit, the negative electrode of the detection probe is also connected with the ground terminal of the second operational amplifier unit.

[0028] Further improvement, the intelligent detection device further comprises an interactive display module, the interactive display module is connected with the power module and the main control MCU module respectively.

[0029] Further improvement, the intelligent detection device further comprises a printing interface module, the printing interface module is connected with the power module and the main control MCU module respectively.

[0030] Further improved, the master MCU module is also used to calculate the frequency value of the first voltage signal and the frequency value of the second voltage signal, wherein the master MCU module is also pre-provided with a frequency reference value corresponding to the first voltage signal and a frequency reference value corresponding to the second voltage signal; the master MCU module is used to compare the frequency value of the first voltage signal with the frequency reference value corresponding to the first voltage signal, and compare the frequency value of the second voltage signal with the frequency reference value corresponding to the second voltage signal, to generate a third comparison result.

[0031] The beneficial effects of the present application are:

[0032] (1) Through the settings of the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module, the FSK signal acquisition module and the coil resistance acquisition module, the intelligent acquisition of the transmission signal and the reception signal of the wheel sensor pair in the axle counting signal source equipment, the FSK signal transmitted by the wheel axle detector and the resistance characteristic parameters of each coil in the wheel sensor pair is realized, the amplitude, frequency and resistance are calculated by the master MCU module, and the comparison with the pre-set reference value is performed, and the performance state and fault point of the detected axle counting signal source equipment can be quickly confirmed by the detection personnel according to each comparison result, the fault processing time is reduced, and the work difficulty of the detection personnel is reduced.

[0033] (2) The first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module and the FSK signal acquisition module each have their own reference voltage. Because the reference voltage drift is a common source of analog measurement error, if the measurement value of one of the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module, the FSK signal acquisition module and the coil resistance acquisition module has an error, the first reference voltage of the acquisition module with the error can be easily corrected. Specifically, the amplitude setting process during the amplitude calculation of the master MCU module in the ordinary embodiment can be combined, so that the analog measurement error correction process is quickly completed, and thus the detection accuracy and detection efficiency of the intelligent detection device realized by the embodiment of the present application are further improved.

[0034] (3) Combined with the settings of the detection pen and the multi-way switching module, the detection pen is easy to operate and learn, so that the intelligent detection device realized by the embodiment of the present application is more convenient, greatly improves the work efficiency of the detection personnel, and avoids the influence on the normal operation of the rail transit.

[0035] (4) Combined with the setting of the interactive display module, the reading of each comparison result by the detection personnel is facilitated, the historical fault information searching and statistical process is simplified, and the work efficiency of the detection personnel is improved.

[0036] (5), in combination with the setting of the printing interface module, facilitate the detection personnel to read each comparison result, simplify the historical fault information search and statistical process, improve the work efficiency of the detection personnel. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A component block diagram of the intelligent detection device for the axle counting signal source equipment;

[0038] Figure 2 A principle diagram of the coil resistance acquisition module;

[0039] Figure 3 A principle diagram of the first signal acquisition module and the second signal acquisition module;

[0040] Figure 4 A principle diagram of the third signal acquisition module and the fourth signal acquisition module;

[0041] Figure 5 A principle diagram of the FSK signal acquisition module;

[0042] Figure 6 A principle diagram of the multiplexing module. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in combination with embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort fall within the scope of the present application.

[0044] Reference Figures 1-6 The present embodiment provides an intelligent detection device for axle counting signal source equipment, which realizes performance detection on the axle counting signal source equipment in the axle counting equipment.

[0045] Specifically, an intelligent detection device for axle counting signal source equipment includes a power module, a main control MCU module, a first signal acquisition module, a second signal acquisition module, a third signal acquisition module, a fourth signal acquisition module, an FSK signal acquisition module, and a coil resistance acquisition module.

[0046] The power module is used to power the main control MCU module, the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module, the FSK signal acquisition module, and the coil resistance acquisition module. The power module is also used to generate a first reference voltage and send the first reference voltage to the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module, and the FSK signal acquisition module.

[0047] The first signal acquisition module is configured to acquire a first voltage signal output by the first wheel sensor on the sending side, and perform ADC conversion on the first voltage signal based on a first reference voltage, and then send the converted first voltage signal to the master MCU module. When performing ADC conversion on the first voltage signal, the first reference voltage is used as the voltage reference value for analog-to-digital conversion.

[0048] The second signal acquisition module is configured to acquire a second voltage signal output by the second wheel sensor on the sending side, and perform ADC conversion on the second voltage signal based on the first reference voltage, and then send the converted second voltage signal to the master MCU module. When performing ADC conversion on the second voltage signal, the first reference voltage is used as the voltage reference value for analog-to-digital conversion.

[0049] The third signal acquisition module is configured to acquire a third voltage signal received by the first wheel sensor on the receiving side, and perform ADC conversion on the third voltage signal based on the first reference voltage, and then send the converted third voltage signal to the master MCU module. When performing ADC conversion on the third voltage signal, the first reference voltage is used as the voltage reference value for analog-to-digital conversion.

[0050] The fourth signal acquisition module is configured to acquire a fourth voltage signal received by the second wheel sensor on the receiving side, and perform ADC conversion on the fourth voltage signal based on the first reference voltage, and then send the converted fourth voltage signal to the master MCU module. When performing ADC conversion on the fourth voltage signal, the first reference voltage is used as the voltage reference value for analog-to-digital conversion.

[0051] The FSK signal acquisition module is configured to acquire an FSK signal output by the wheel shaft detector, and perform ADC conversion on the FSK signal based on the first reference voltage, and then send the converted FSK signal to the master MCU module. When performing ADC conversion on the FSK signal, the first reference voltage is used as the voltage reference value for analog-to-digital conversion.

[0052] The coil resistance acquisition module is configured to acquire the resistance characteristic parameter of the coil on the sending side of the first wheel sensor, or the coil on the receiving side of the first wheel sensor, or the coil on the sending side of the second wheel sensor, or the coil on the receiving side of the second wheel sensor, and send the acquired resistance characteristic parameter to the master MCU module.

[0053] The master MCU module is configured to calculate the amplitude of the received first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, the amplitude of the fourth voltage signal, calculate the coil resistance value according to the received resistance characteristic parameter, and perform frequency division processing on the FSK signal. After the frequency division processing, a plurality of FSK frequency division signals are generated, and the frequency values of the FSK frequency division signals are calculated. The master MCU module is preconfigured with a plurality of reference values, each of which corresponds to the first voltage signal, the second voltage signal, the third voltage signal, the fourth voltage signal and each FSK frequency division signal one by one, that is, the amplitude of the first voltage signal corresponds to one reference value, the amplitude of the second voltage signal corresponds to one reference value, the amplitude of the third voltage signal corresponds to one reference value, the amplitude of the fourth voltage signal corresponds to one reference value, and each FSK frequency division signal corresponds to one reference value. In addition, the master MCU module is also preconfigured with a reference value corresponding to the above-mentioned resistance characteristic parameter.

[0054] The master MCU module is also configured to compare the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, the amplitude of the fourth voltage signal, and the frequency value of each FSK frequency division signal with the corresponding reference value respectively, generate a first comparison result, and compare the coil resistance value with the reference value corresponding to the resistance characteristic parameter, and generate a second comparison result.

[0055] The master MCU module is also configured to compare the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, the amplitude of the fourth voltage signal, and the frequency value of each FSK frequency division signal with the corresponding reference value respectively, generate a first comparison result, and compare the coil resistance value with the reference value corresponding to the resistance characteristic parameter, and generate a second comparison result.

[0056] As a kind of preferred, coil resistance acquisition module includes first operational amplifier unit and second operational amplifier unit.The noninverting input terminal of first operational amplifier unit is connected with the first voltage output terminal of power module, the inverting input terminal of first operational amplifier unit is connected with the output terminal of first operational amplifier unit, and the output terminal of first operational amplifier unit is also connected with the noninverting input terminal of second operational amplifier unit.The inverting input terminal of second operational amplifier unit is used to be connected with the first end of the first wheel sensor sending side coil, and the ground terminal of second operational amplifier unit is used to be connected with the second end of the first wheel sensor sending side coil;Or;The inverting input terminal of second operational amplifier unit is used to be connected with the first end of the first wheel sensor receiving side coil, and the ground terminal of second operational amplifier unit is used to be connected with the second end of the first wheel sensor receiving side coil;Or;The inverting input terminal of second operational amplifier unit is used to be connected with the first end of the second wheel sensor sending side coil, and the ground terminal of second operational amplifier unit is used to be connected with the second end of the second wheel sensor sending side coil;Or;The inverting input terminal of second operational amplifier unit is used to be connected with the first end of the second wheel sensor receiving side coil, and the ground terminal of second operational amplifier unit is used to be connected with the second end of the second wheel sensor receiving side coil.The inverting input terminal of second operational amplifier unit is also connected with the output terminal of second operational amplifier unit through first feedback resistance, and the output terminal of second operational amplifier unit is connected with the first acquisition end of main control MCU module.The above-mentioned circuit is detected to the resistance value of coil by taking coil as the feedback resistance of second operational amplifier unit, to achieve the detection of coil resistance value.

[0057] Specifically, as Figure 2As shown, the first operational amplifier unit adopts a first operational amplifier U14A of model MAX4495, and the second operational amplifier unit adopts a second operational amplifier U14B of model MAX4495. The non-inverting input terminal of the first operational amplifier U14A is connected with the first voltage output terminal of the power module, and the first voltage output terminal of the power module is the first terminal of a first resistor R21. The power module comprises a first voltage stabilizing chip U13 of model REF5040, which performs voltage stabilizing processing on the +5V direct current voltage generated in the power module. The VIN terminal of the first voltage stabilizing chip U13 is connected with the +5V direct current voltage output terminal and the first terminal of a first capacitor C15 in the power module respectively, the second terminal of the first capacitor C15 and the GND terminal of the first voltage stabilizing chip U13 are both connected to a first grounding terminal DGND, the VOUT terminal of the first voltage stabilizing chip U13 is connected with the first terminal of a second capacitor C16 and the second terminal of the first resistor R21 respectively, the second terminal of the second capacitor C16 is connected to the first grounding terminal DGND, and the first terminal of the first resistor R21 is also connected to the first grounding terminal DGND through a second resistor R22. The inverting input terminal of the first operational amplifier U14A is connected with the output terminal of the first operational amplifier U14A, and the output terminal of the first operational amplifier U14A is also connected with the non-inverting input terminal of the second operational amplifier U14B through a third resistor R23. When detecting the axle signal source equipment, if the resistance value of the first wheel sensor sending side coil needs to be tested, the inverting input terminal of the second operational amplifier U14B is connected with the first terminal of the first wheel sensor sending side coil, and the first grounding terminal DGND (the grounding terminal of the second operational amplifier unit) is connected with the second terminal of the first wheel sensor sending side coil. If the resistance value of the second wheel sensor sending side coil needs to be tested, the inverting input terminal of the second operational amplifier U14B is connected with the first terminal of the second wheel sensor sending side coil, and the first grounding terminal DGND is connected with the second terminal of the second wheel sensor sending side coil. If the resistance value of the first wheel sensor receiving side coil needs to be tested, the inverting input terminal of the second operational amplifier U14B is connected with the first terminal of the first wheel sensor receiving side coil, and the first grounding terminal DGND is connected with the second terminal of the first wheel sensor receiving side coil. If the resistance value of the second wheel sensor receiving side coil needs to be tested, the inverting input terminal of the second operational amplifier U14B is connected with the first terminal of the second wheel sensor receiving side coil, and the first grounding terminal DGND is connected with the second terminal of the second wheel sensor receiving side coil. The inverting input terminal of the second operational amplifier U14B is also connected with the output terminal of the second operational amplifier U14B through a fourth resistor R24 (first feedback resistor), and the output terminal of the second operational amplifier U14B is connected with the IO16 terminal (first collection terminal) of a single-chip microcomputer U2. The IO16 terminal of the single-chip microcomputer U2 is selected from a general-purpose IO port.In addition, the single-chip microcomputer U2 is also used for receiving a second reference voltage output by the power module. Specifically, the power module further comprises a second voltage stabilizing chip U15, the model of the second voltage stabilizing chip U15 is REF2925, the VIN end of the second voltage stabilizing chip U15 is connected with the first end of a third capacitor C17 and a +5V direct current voltage output end in the power module respectively, the second end of the third capacitor C17 and the GND end of the second voltage stabilizing chip U15 are both connected to a first ground end DGND, the VOUT end of the second voltage stabilizing chip U15 is connected with the first end of a fourth capacitor C18 and the Vref+ end of the single-chip microcomputer U2 respectively, the second end of the fourth capacitor C18 and the Vref- end of the single-chip microcomputer U2 are both connected to the first ground end DGND. The single-chip microcomputer U2 calculates the coil resistance value according to the amplitude of the voltage signal (resistance characteristic parameter) received by the IO16 end, the specification parameter of the first operational amplifier U14A, the specification parameter of the second operational amplifier U14B and the resistance values of the resistances in the coil resistance acquisition module.

[0058] As a preferred, the first signal acquisition module comprises a third operational amplifier unit and a first ADC conversion unit. The non-inverting input end of the third operational amplifier unit is used for being connected with the positive output end of the first voltage signal output on the sending side of the first wheel sensor, the inverting input end of the third operational amplifier unit is used for being connected with the negative output end of the first voltage signal output on the sending side of the first wheel sensor, the non-inverting output end of the third operational amplifier unit is connected with the first input end of the first ADC conversion unit, the inverting output end of the third operational amplifier unit is connected with the second input end of the first ADC conversion unit, the reference voltage end of the first ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the first ADC conversion unit is connected with the second acquisition end of the master control MCU module. The second signal acquisition module comprises a fourth operational amplifier unit and a second ADC conversion unit, the non-inverting input end of the fourth operational amplifier unit is used for being connected with the positive output end of the second voltage signal output on the sending side of the second wheel sensor, the inverting input end of the fourth operational amplifier unit is used for being connected with the negative output end of the second voltage signal output on the sending side of the second wheel sensor, the non-inverting output end of the fourth operational amplifier unit is connected with the first input end of the second ADC conversion unit, the inverting output end of the fourth operational amplifier unit is connected with the second input end of the second ADC conversion unit, the reference voltage end of the second ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the second ADC conversion unit is connected with the third acquisition end of the master control MCU module.

[0059] Specifically, as shown in FIG. 1, the first signal acquisition module comprises a first operational amplifier U14A and a first ADC conversion unit U1, the non-inverting input end of the first operational amplifier U14A is used for being connected with the positive output end of the first voltage signal output on the sending side of the first wheel sensor, the inverting input end of the first operational amplifier U14A is used for being connected with the negative output end of the first voltage signal output on the sending side of the first wheel sensor, the non-inverting output end of the first operational amplifier U14A is connected with the first input end of the first ADC conversion unit U1, the inverting output end of the first operational amplifier U14A is connected with the second input end of the first ADC conversion unit U1, the reference voltage end of the first ADC conversion unit U1 is used for receiving the first reference voltage generated by the power module, and the output end of the first ADC conversion unit U1 is connected with the second acquisition end of the master control MCU module. Figure 3As shown, the first ADC conversion unit and the second ADC conversion unit adopt the same ADC conversion chip, which is the first ADC conversion chip U5. The first ADC conversion chip U5 adopts the model ADS7263. The third operational amplifier unit adopts the third operational amplifier U6 with the model AMC1350. The fourth operational amplifier unit adopts the fourth operational amplifier U7 with the model AMC1350. The non-inverting input end INP of the third operational amplifier U6 is connected to the positive output end of the first voltage signal of the first wheel sensor sending side in the tested axle signal source device through the fifth resistor R6. The inverting input end INN of the third operational amplifier U6 is connected to the negative output end of the first voltage signal of the first wheel sensor sending side in the tested axle signal source device. Generally, the negative output end of the first voltage signal of the first wheel sensor sending side is grounded. The inverting input end INN of the third operational amplifier U6 and the GND1 end of the third operational amplifier U6 are both connected to the second ground end AGND1. The VDD1 end of the third operational amplifier U6 is connected to the AVCC1 voltage output end of the power module. The VDD2 end of the third operational amplifier U6 is connected to the AVCC2 voltage output end of the power module. The GND2 end of the third operational amplifier U6 is connected to the third ground end AGND2. The non-inverting input end INP of the third operational amplifier U6 is also grounded through the sixth resistor R8. The non-inverting output end OUTP of the third operational amplifier U6 is connected to the CHB0P end (the first input end A) of the first ADC conversion chip U5 through the seventh resistor R5. The inverting output end OUTN of the third operational amplifier U6 is connected to the CHB0N end (the second input end A) of the first ADC conversion chip U5 through the eighth resistor R7. The fifth capacitor C5 is connected in series between the CHB0P end of the first ADC conversion chip U5 and the CHB0N end of the first ADC conversion chip U5.

[0060] The noninverting input terminal INP of the fourth operational amplifier U7 is connected to the positive output terminal of the second voltage signal of the second wheel sensor transmission side in the measured axle signal source device through the ninth resistor R10, the inverting input terminal INN of the fourth operational amplifier U7 is connected to the negative output terminal of the second voltage signal of the second wheel sensor transmission side in the measured axle signal source device, generally, the negative output terminal of the second voltage signal of the second wheel sensor transmission side is grounded, the inverting input terminal INN of the fourth operational amplifier U7 and the GND1 terminal of the fourth operational amplifier U7 are both connected to the second ground terminal AGND1, the VDD1 terminal of the fourth operational amplifier U7 is connected to the AVCC1 voltage output terminal of the power module, the VDD2 terminal of the fourth operational amplifier U7 is connected to the AVCC2 voltage output terminal of the power module, the GND2 terminal of the fourth operational amplifier U7 is connected to the third ground terminal AGND2, the noninverting input terminal INP of the fourth operational amplifier U7 is further grounded through the tenth resistor R12, the noninverting output terminal OUTP of the fourth operational amplifier U7 is connected to the CHA0P terminal (the first input terminal B) of the first ADC conversion chip U5 through the thirtieth resistor R9, the inverting output terminal OUTN of the fourth operational amplifier U7 is connected to the CHA0N terminal (the second input terminal B) of the first ADC conversion chip U5 through the eleventh resistor R11, and the sixth capacitor C6 is connected in series between the CHA0P terminal of the first ADC conversion chip U5 and the CHA0N terminal of the first ADC conversion chip U5.The reference voltage end REFIO1 of the first ADC conversion chip U5 is connected with the first end of the seventh capacitor C9 and the VOUT end of the third voltage stabilizing chip U8 respectively, the third voltage stabilizing chip U8 is used for outputting the first reference voltage, the second end of the seventh capacitor C9 is connected to the third ground end AGND2, the VIN end of the third voltage stabilizing chip U8 is connected with the AVCC2 voltage output end of the power module, the GND end of the third voltage stabilizing chip U8 is connected to the third ground end AGND2, the eighth capacitor C8 is connected in series between the VIN end of the third voltage stabilizing chip U8 and the GND end of the third voltage stabilizing chip U8, the RGND end of the first ADC conversion chip U5 is connected to the third ground end AGND2, the AVDD end of the first ADC conversion chip U5 is connected to the AVCC2 voltage output end of the power module, the AGND end of the first ADC conversion chip U5 is connected to the third ground end AGND2, the fourteenth capacitor C7 is connected in series between the AVDD end and the AGND end of the first ADC conversion chip U5, the SDOA end of the first ADC conversion chip U5 is connected with the IO1 end of the single-chip microcomputer U2, the SDOB end of the first ADC conversion chip U5 is connected with the IO2 end of the single-chip microcomputer U2, the CLOCK end of the first ADC conversion chip U5 is connected with the IO3 end of the single-chip microcomputer U2, the RD end of the first ADC conversion chip U5 is connected with the IO4 end of the single-chip microcomputer U2, the CONVST end of the first ADC conversion chip U5 is connected with the IO5 end of the single-chip microcomputer U2, the CS end, the SDI end and the M0 end of the first ADC conversion chip U5 are all connected to the first ground end DGND, the M1 end and the DVDD end of the first ADC conversion chip U5 are all connected to the DVCC voltage output end of the power module, and the DGND end of the first ADC conversion chip U5 is connected to the first ground end DGND. The IO1 end to the IO5 end of the single-chip microcomputer U2 are selected from the general IO port of the single-chip microcomputer U2.

[0061] As a kind of preferred, third signal acquisition module includes fifth operational amplifier unit and third ADC conversion unit, the noninverting input end of fifth operational amplifier unit is used to be connected with the third voltage signal output positive terminal of first wheel sensor receiving side, the inverting input end of fifth operational amplifier unit is used to be connected with the third voltage signal output negative terminal of first wheel sensor receiving side, the noninverting output end of fifth operational amplifier unit is connected with the first input end of third ADC conversion unit, the inverting output end of fifth operational amplifier unit is connected with the second input end of third ADC conversion unit, the reference voltage end of third ADC conversion unit is used to receive the first reference voltage generated by power module, the output end of third ADC conversion unit is connected with the fourth acquisition end of main control MCU module.Fourth signal acquisition module includes sixth operational amplifier unit and fourth ADC conversion unit, the noninverting input end of sixth operational amplifier unit is used to be connected with the fourth voltage signal output positive terminal of second wheel sensor receiving side, the inverting input end of sixth operational amplifier unit is used to be connected with the fourth voltage signal output negative terminal of second wheel sensor receiving side, the noninverting output end of sixth operational amplifier unit is connected with the first input end of fourth ADC conversion unit, the inverting output end of sixth operational amplifier unit is connected with the second input end of fourth ADC conversion unit, the reference voltage end of fourth ADC conversion unit is used to receive the first reference voltage generated by power module, the output end of fourth ADC conversion unit is connected with the fifth acquisition end of main control MCU module.

[0062] Specifically, as Figure 4As shown, the third ADC conversion unit and the fourth ADC conversion unit adopt the same ADC conversion chip, which is the second ADC conversion chip U9, the model of the second ADC conversion chip U9 is ADS7263, the fifth operational amplifier unit adopts the fifth operational amplifier U10 with the model of AMC1301, and the sixth operational amplifier unit adopts the sixth operational amplifier U11 with the model of AMC1301. The non-inverting input end INP of the fifth operational amplifier U10 is connected to the positive output end of the third voltage signal of the first wheel sensor receiving side in the measured axle signal source device through the twelfth resistor R14, the inverting input end INN of the fifth operational amplifier U10 is connected to the negative output end of the third voltage signal of the first wheel sensor receiving side in the measured axle signal source device, generally, the negative output end of the third voltage signal of the first wheel sensor receiving side is grounded, the inverting input end INN of the fifth operational amplifier U10 and the GND1 end of the fifth operational amplifier U10 are connected to the second ground end AGND1, the VDD1 end of the fifth operational amplifier U10 is connected to the AVCC1 voltage output end of the power module, the VDD2 end of the fifth operational amplifier U10 is connected to the AVCC2 voltage output end of the power module, the GND2 end of the fifth operational amplifier U10 is connected to the third ground end AGND2, the non-inverting input end INP of the fifth operational amplifier U10 is also connected to the second ground end AGND1 through the thirteenth resistor R16, the non-inverting output end OUTP of the fifth operational amplifier U10 is connected to the CHB0P end (the first input end A) of the second ADC conversion chip U9 through the fourteenth resistor R13, the inverting output end OUTN of the fifth operational amplifier U10 is connected to the CHB0N end (the second input end A) of the second ADC conversion chip U9 through the fifteenth resistor R15, and the tenth capacitor C10 is connected in series between the CHB0P end of the second ADC conversion chip U9 and the CHB0N end of the second ADC conversion chip U9.The noninverting input terminal INP of the sixth operational amplifier U11 is connected to the positive output terminal of the fourth voltage signal on the receiving side of the second wheel sensor in the measured axle signal source device through the sixteenth resistor R18, the inverting input terminal INN of the sixth operational amplifier U11 is connected to the negative output terminal of the fourth voltage signal on the receiving side of the second wheel sensor in the measured axle signal source device, generally, the negative output terminal of the fourth voltage signal on the receiving side of the second wheel sensor is grounded, the inverting input terminal INN of the sixth operational amplifier U11 and the GND1 terminal of the sixth operational amplifier U11 are both connected to the second ground terminal AGND1, the VDD1 terminal of the sixth operational amplifier U11 is connected to the AVCC1 voltage output terminal of the power module, the VDD2 terminal of the sixth operational amplifier U11 is connected to the AVCC2 voltage output terminal of the power module, the GND2 terminal of the sixth operational amplifier U11 is connected to the third ground terminal AGND2, the noninverting input terminal INP of the sixth operational amplifier U11 is further grounded through the seventeenth resistor R20, the noninverting output terminal OUTP of the sixth operational amplifier U11 is connected to the CHA0P terminal (the first input terminal B) of the second ADC conversion chip U9 through the eighteenth resistor R17, the inverting output terminal OUTN of the sixth operational amplifier U11 is connected to the CHA0N terminal (the second input terminal B) of the second ADC conversion chip U9 through the nineteenth resistor R19, and the eleventh capacitor C11 is connected in series between the CHA0P terminal of the second ADC conversion chip U9 and the CHA0N terminal of the second ADC conversion chip U9.The reference voltage end REFIO1 of the second ADC conversion chip U9 is connected with the first end of the twelfth capacitor C14 and the VOUT end of the fourth voltage stabilizing chip U12 respectively, the fourth voltage stabilizing chip U12 is used for outputting a first reference voltage, the second end of the twelfth capacitor C14 is connected to the third ground end AGND2, the VIN end of the fourth voltage stabilizing chip U12 is connected with the AVCC2 voltage output end of the power module, the GND end of the fourth voltage stabilizing chip U12 is connected to the third ground end AGND2, the thirteenth capacitor C13 is connected in series between the VIN end of the fourth voltage stabilizing chip U12 and the GND end of the fourth voltage stabilizing chip U12, the RGND end of the second ADC conversion chip U9 is connected to the third ground end AGND2, the AVDD end of the second ADC conversion chip U9 is connected to the AVCC2 voltage output end of the power module, the AGND end of the second ADC conversion chip U9 is connected to the third ground end AGND2, the fifteenth capacitor C12 is connected in series between the AVDD end and the AGND end of the second ADC conversion chip U9, the SDOA end of the second ADC conversion chip U9 is connected with the IO6 end of the single-chip microcomputer U2, the SDOB end of the second ADC conversion chip U9 is connected with the IO7 end of the single-chip microcomputer U2, the CLOCK end of the second ADC conversion chip U9 is connected with the IO8 end of the single-chip microcomputer U2, the RD end of the second ADC conversion chip U9 is connected with the IO9 end of the single-chip microcomputer U2, the CONVST end of the second ADC conversion chip U9 is connected with the IO10 end of the single-chip microcomputer U2, the CS end, the SDI end and the M0 end of the second ADC conversion chip U9 are all connected to the first ground end DGND, the M1 end and the DVDD end of the second ADC conversion chip U9 are all connected to the DVCC voltage output end of the power module, and the DGND end of the second ADC conversion chip U9 is connected to the first ground end DGND. The IO6 end to the IO10 end of the single-chip microcomputer U2 are selected from the general IO port of the single-chip microcomputer U2.

[0063] As a preferred, the FSK signal acquisition module comprises a seventh operational amplifier unit and a fifth ADC conversion unit, the noninverting input end of the seventh operational amplifier unit is used for being connected with the FSK signal output positive end of the wheel shaft detector, the inverting input end of the seventh operational amplifier unit is used for being connected with the FSK signal output negative end of the wheel shaft detector, the noninverting output end of the seventh operational amplifier unit is connected with the first input end of the fifth ADC conversion unit, the inverting output end of the seventh operational amplifier unit is connected with the second input end of the fifth ADC conversion unit, the reference voltage end of the fifth ADC conversion unit is used for receiving the first reference voltage generated by the power module, and the output end of the fifth ADC conversion unit is connected with the sixth acquisition end of the master control MCU module.

[0064] Specifically, as Figure 5As shown, the seventh ADC conversion unit adopts an ADC conversion chip, which is a third ADC conversion chip U1, the third ADC conversion chip U1 adopts a model of ADS7263, and the seventh operational amplifier unit adopts a seventh operational amplifier U3 with a model of AMC1350. The non-inverting input end INP of the seventh operational amplifier U3 is connected to the positive output end of the wheel detector FSK signal in the axle signal source equipment to be tested through the twenty-eighth resistor R2, the inverting input end INN of the seventh operational amplifier U3 is connected to the negative output end of the wheel detector FSK signal in the axle signal source equipment to be tested, generally, the negative output end of the wheel detector FSK signal is grounded, the inverting input end INN of the seventh operational amplifier U3 and the GND1 end of the seventh operational amplifier U3 are both connected to the second ground end AGND1, the VDD1 end of the seventh operational amplifier U3 is connected to the AVCC1 voltage output end of the power module, the VDD2 end of the seventh operational amplifier U3 is connected to the AVCC2 voltage output end of the power module, the GND2 end of the seventh operational amplifier U3 is connected to the third ground end AGND2, the non-inverting input end INP of the seventh operational amplifier U3 is also connected to the second ground end AGND1 through the twenty-ninth resistor R4, the non-inverting output end OUTP of the seventh operational amplifier U3 is connected to the CHB0P end (the first input end A) of the third ADC conversion chip U1 through the eighteenth resistor R1, the inverting output end OUTN of the seventh operational amplifier U3 is connected to the CHB0N end (the second input end A) of the third ADC conversion chip U1 through the twenty-seventh resistor R3, and the sixteenth capacitor C1 is connected in series between the CHB0P end of the third ADC conversion chip U1 and the CHB0N end of the third ADC conversion chip U1.The reference voltage end REFIO1 of the third ADC conversion chip U1 is connected with the first end of the seventeenth capacitor C3 and the VOUT end of the fifth voltage stabilizing chip U4 respectively, the second end of the seventeenth capacitor C3 is connected to the third ground end AGND2, the VIN end of the fifth voltage stabilizing chip U4 is connected with the AVCC2 voltage output end of the power module, the GND end of the fifth voltage stabilizing chip U4 is connected to the third ground end AGND2, the eighteenth capacitor C2 is connected in series between the VIN end of the fifth voltage stabilizing chip U4 and the GND end of the fifth voltage stabilizing chip U4, the RGND end of the third ADC conversion chip U1 is connected to the third ground end AGND2, the AVDD end of the third ADC conversion chip U1 is connected to the AVCC2 voltage output end of the power module, the AGND end of the third ADC conversion chip U1 is connected to the third ground end AGND2, the nineteenth capacitor C4 is connected in series between the AVDD end and the AGND end of the third ADC conversion chip U1, the SDOA end of the third ADC conversion chip U1 is connected with the IO11 end of the single-chip microcomputer U2, the SDOB end of the third ADC conversion chip U1 is connected with the IO12 end of the single-chip microcomputer U2, the CLOCK end of the third ADC conversion chip U1 is connected with the IO13 end of the single-chip microcomputer U2, the RD end of the third ADC conversion chip U1 is connected with the IO14 end of the single-chip microcomputer U2, the CONVST end of the third ADC conversion chip U1 is connected with the IO15 end of the single-chip microcomputer U2, the CS end, the SDI end and the M0 end of the third ADC conversion chip U1 are all connected to the first ground end DGND, the M1 end and the DVDD end of the third ADC conversion chip U1 are all connected to the DVCC voltage output end of the power module, the DGND end of the third ADC conversion chip U1 is connected to the first ground end DGND. The IO11 end to the IO15 end of the single-chip microcomputer U2 are selected from the general IO port of the single-chip microcomputer U2.

[0065] In addition, in order to facilitate the detection personnel to operate the intelligent detection device realized by the embodiment, a detection pen and a multi-path switching module are further added in the intelligent detection device. When the detection of the signal source signal is performed, the positive electrode of the detection pen is connected with one of the input / output positive terminals of each signal source of the signal source equipment to be detected, and the negative electrode of the detection pen is connected with the input / output negative terminal associated with the signal source input / output positive terminal, so as to implement the collection of the signal source signal. When the coil resistance detection is performed, the positive electrode of the detection pen is connected with the first end of one of the coils of the wheel sensor pair, and the negative electrode of the detection pen is connected with the second end of the coil, so as to implement the collection of the resistance characteristic parameter of the coil. The multi-path switching module is used for switching and gating the first signal collection module, the second signal collection module, the third signal collection module, the fourth signal collection module, the FSK signal collection module and the coil resistance collection module, and at the same time, only the connection between the detection pen and one of the six collection modules is connected, and the connection between the detection pen and the other five collection modules is disconnected.

[0066] Specifically, as Figure 6As shown, the multi-path switching module includes an interlocking switch U16, six key switches and six relays. The model of the interlocking switch U16 is TC9135, the six key switches are a first key switch SB1, a second key switch SB2, a third key switch SB3, a fourth key switch SB4, a fifth key switch SB5 and a sixth key switch SB6, and the six relays are a first relay K1, a second relay K2, a third relay K3, a fourth relay K4, a fifth relay K5 and a sixth relay K6. The first end of the first key switch SB1, the first end of the second key switch SB2, the first end of the third key switch SB3, the first end of the fourth key switch SB4, the first end of the fifth key switch SB5 and the first end of the sixth key switch SB6 are all connected to the fourth ground terminal GND, the second end of the first key switch SB1 is connected to the VCC voltage output terminal of the power module through the twentieth resistor R25, the second end of the second key switch SB2 is connected to the VCC voltage output terminal of the power module through the twenty-first resistor R26, the second end of the third key switch SB3 is connected to the VCC voltage output terminal of the power module through the twenty-second resistor R27, the second end of the fourth key switch SB4 is connected to the VCC voltage output terminal of the power module through the twenty-third resistor R28, the second end of the fifth key switch SB5 is connected to the VCC voltage output terminal of the power module through the twenty-fourth resistor R29, the second end of the sixth key switch SB6 is connected to the VCC voltage output terminal of the power module through the twenty-fifth resistor R30, the second end of the first key switch SB1 is connected to the IN1 terminal of the interlocking switch U16, the second end of the second key switch SB2 is connected to the IN2 terminal of the interlocking switch U16, the second end of the third key switch SB3 is connected to the IN3 terminal of the interlocking switch U16, the second end of the fourth key switch SB4 is connected to the IN4 terminal of the interlocking switch U16, the second end of the fifth key switch SB5 is connected to the IN5 terminal of the interlocking switch U16, and the second end of the sixth key switch SB6 is connected to the IN6 terminal of the interlocking switch U16. The OUT1 terminal of the interlocking switch U16 is connected to the control terminal of the first relay K1, the control terminal of the first relay K1 is also connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the power terminal of the first relay K1, the first static contact of the first relay K1 is connected to the anode of the detection probe, the second static contact of the first relay K1 is connected to the cathode of the detection probe, the first dynamic contact of the first relay K1 is connected to the non-inverting input terminal INP of the third operational amplifier U6 through the fifth resistor R6, and the second dynamic contact of the first relay K1 is connected to the inverting input terminal INN of the third operational amplifier U6.The second static contact of the second relay K2 is connected with the negative pole of the detection probe, the first moving contact of the second relay K2 is connected with the non-inverting input terminal INP of the fourth operational amplifier U7 through the ninth resistor R10, the second moving contact of the second relay K2 is connected with the inverting input terminal INN of the fourth operational amplifier U7, the OUT3 terminal of the interlocking switch U16 is connected with the control terminal of the third relay K3, the control terminal of the third relay K3 is also connected with the anode of the third diode D3, the cathode of the third diode D3 is connected to the power terminal of the third relay K3, the first static contact of the third relay K3 is connected with the positive pole of the detection probe, the second static contact of the third relay K3 is connected with the negative pole of the detection probe, the first moving contact of the third relay K3 is connected with the non-inverting input terminal INP of the seventh operational amplifier U3 through the twenty-eighth resistor R2, the second moving contact of the third relay K3 is connected with the inverting input terminal INN of the seventh operational amplifier U3, the OUT4 terminal of the interlocking switch U16 is connected with the control terminal of the fourth relay K4, the control terminal of the fourth relay K4 is also connected with the anode of the fourth diode D4, the cathode of the fourth diode D4 is connected to the power terminal of the fourth relay K4, the first static contact of the fourth relay K4 is connected with the positive pole of the detection probe, the second static contact of the fourth relay K4 is connected with the negative pole of the detection probe, the first moving contact of the fourth relay K4 is connected with the non-inverting input terminal INP of the fifth operational amplifier U10 through the twelfth resistor R14, the second moving contact of the fourth relay K4 is connected with the inverting input terminal INN of the fifth operational amplifier U10, the OUT5 terminal of the interlocking switch U16 is connected with the control terminal of the fifth relay K5, the control terminal of the fifth relay K5 is also connected with the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to the power terminal of the fifth relay K5, the first static contact of the fifth relay K5 is connected with the positive pole of the detection probe, the second static contact of the fifth relay K5 is connected with the negative pole of the detection probe, the first moving contact of the fifth relay K5 is connected with the non-inverting input terminal INP of the sixth operational amplifier U11 through the sixteenth resistor R18, the second moving contact of the fifth relay K5 is connected with the inverting input terminal INN of the sixth operational amplifier U11, the OUT6 terminal of the interlocking switch U16 is connected with the control terminal of the sixth relay K6, the control terminal of the sixth relay K6 is also connected with the anode of the sixth diode D6, the cathode of the sixth diode D6 is connected to the power terminal of the sixth relay K6, the first static contact of the sixth relay K6 is connected with the positive pole of the detection probe, the second static contact of the sixth relay K6 is connected with the negative pole of the detection probe, the first moving contact of the sixth relay K6 is connected with the inverting input terminal of the second operational amplifier U14B, the second moving contact of the sixth relay K6 is connected with the first ground terminal DGND, and the power terminals of the first relay K1 to the sixth relay K6 are all connected to the VCC voltage output terminal of the power module.

[0067] When the detection personnel presses any one of the key switches, the input IN end of the interlock switch U16 corresponding to the key switch changes from a logic high level to a logic low level, and the input IN end is triggered, when the detection personnel simultaneously presses multiple key switches, multiple input IN ends of the interlock switch U16 corresponding to the multiple key switches change from a logic high level to a logic low level, and through the interlock function of the interlock switch U16, the multiple input IN ends cannot be triggered at this time. When the input IN end of the interlock switch U16 is triggered, for example, the IN1 end of the interlock switch U16 is triggered, the OUT1 end of the interlock switch U16 outputs a control level to the first relay K1 connected to the OUT1 end, both relay switches inside the first relay K1 are closed, and the first signal acquisition module realizes the connection with the detection pen. At this time, when the detection personnel connects the positive electrode of the detection pen to the first voltage signal output positive end (terminal or test hole, etc.) of the first wheel sensor sending side and connects the negative electrode of the detection pen to the first voltage signal output negative end (terminal or test hole, etc.) of the first wheel sensor sending side, the collection and detection of the first voltage signal output by the first wheel sensor sending side can be started.

[0068] As a preferred, the single-chip microcomputer U2 is also used for calculating the frequency value of the first voltage signal and the frequency value of the second voltage signal, wherein the single-chip microcomputer U2 is also pre-provided with a frequency reference value corresponding to the first voltage signal and a frequency reference value corresponding to the second voltage signal. The single-chip microcomputer U2 is used for comparing the frequency value of the first voltage signal with the frequency reference value corresponding to the first voltage signal, and comparing the frequency value of the second voltage signal with the frequency reference value corresponding to the second voltage signal, to generate a third comparison result, thereby further realizing the frequency detection of the signals output by the first wheel sensor sending side and the second wheel sensor sending side.

[0069] As a preferred, the intelligent detection device further comprises an interactive display module, and the interactive display module is connected with the power module and the main control MCU module respectively.

[0070] As a preferred, the intelligent detection device further comprises a printing interface module, and the printing interface module is connected with the power module and the main control MCU module respectively.

[0071] The detection process of the intelligent detection device realized by the embodiment of the application is as follows:

[0072] The detection personnel confirms the detection sequence of each signal source signal and each coil resistance in the detected axle signal source equipment, and then performs detection in sequence. The following process is one of the detection sequences:

[0073] The positive electrode of the detection pen is connected to the first voltage signal output positive terminal of the first wheel sensor sending side, the negative electrode of the detection pen is connected to the first voltage signal output negative terminal of the first wheel sensor sending side, and the first button switch SB1 is pressed; the positive electrode of the detection pen is connected to the second voltage signal output positive terminal of the second wheel sensor sending side, the negative electrode of the detection pen is connected to the second voltage signal output negative terminal of the second wheel sensor sending side, and the second button switch SB2 is pressed; the positive electrode of the detection pen is connected to the wheel shaft detector FSK signal output positive terminal, the negative electrode of the detection pen is connected to the wheel shaft detector FSK signal output negative terminal, and the second button switch SB3 is pressed; the positive electrode of the detection pen is connected to the wheel shaft detector FSK signal output positive terminal, the negative electrode of the detection pen is connected to the wheel shaft detector FSK signal output negative terminal, and the third button switch SB3 is pressed; the positive electrode of the detection pen is connected to the third voltage signal output positive terminal of the first wheel sensor receiving side, the negative electrode of the detection pen is connected to the third voltage signal output negative terminal of the first wheel sensor receiving side, and the fourth button switch SB4 is pressed; the positive electrode of the detection pen is connected to the fourth voltage signal output positive terminal of the second wheel sensor receiving side, the negative electrode of the detection pen is connected to the fourth voltage signal output negative terminal of the second wheel sensor receiving side, and the fifth button switch SB5 is pressed; the positive electrode of the detection pen is connected to the first end of the first wheel sensor sending side coil, the negative electrode of the detection pen is connected to the second end of the first wheel sensor sending side coil, and the sixth button switch SB6 is pressed; the positive electrode of the detection pen is connected to the first end of the first wheel sensor receiving side coil, the negative electrode of the detection pen is connected to the second end of the first wheel sensor receiving side coil, and the sixth button switch SB6 is pressed; the positive electrode of the detection pen is connected to the first end of the second wheel sensor sending side coil, the negative electrode of the detection pen is connected to the second end of the second wheel sensor sending side coil, and the sixth button switch SB6 is pressed; the positive electrode of the detection pen is connected to the first end of the second wheel sensor receiving side coil, the negative electrode of the detection pen is connected to the second end of the second wheel sensor receiving side coil, and the sixth button switch SB6 is pressed.

[0074] The first comparison result, the second comparison result and the third comparison result on the interactive display module are read, the performance states of each signal source and each coil of the detected wheel shaft signal source equipment are determined, fault prediction and fault alarm are performed.

[0075] For example, one of the signals split from the FSK signal is a 5060 Hz signal, and the single-chip microcomputer U2 can preset two reference values, 5060 ± 100 Hz and 0 Hz respectively. If the collected frequency is within the range of 5060 ± 100 Hz, it is a normal value, and it can be determined that each component of the wheel axle detector is working normally. If the collected frequency is not within the range of 5060 ± 100 Hz and is not zero, it is an abnormal value, and it can be determined that the TD board of the wheel axle detector is faulty. If the collected frequency is 0 Hz, it is an abnormal value, and it can be determined that the TD board of the wheel axle detector is faulty or the input signal of the front stage of the TD board is abnormal, and further testing of other indicators is required, and analysis is performed in combination with other indicators.

[0076] The above description is only preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. An intelligent detection device for an axle counting signal source device, characterized in that: The system comprises a power supply module, a main control MCU module, a first signal acquisition module, a second signal acquisition module, a third signal acquisition module, a fourth signal acquisition module, and an FSK signal acquisition module; the power supply module is used to generate a first reference voltage and send the first reference voltage to the first signal acquisition module, the second signal acquisition module, the third signal acquisition module, the fourth signal acquisition module, and the FSK signal acquisition module; the first signal acquisition module is used to collect a first voltage signal output by a transmitting side of a first wheel sensor, perform ADC conversion on the first voltage signal based on the first reference voltage, and then send the converted first voltage signal to the main control MCU module; The second signal acquisition module is used to collect the second voltage signal output by the sending side of the second wheel sensor, perform ADC conversion on the second voltage signal based on the first reference voltage, and then send the converted second voltage signal to the main control MCU module; The third signal acquisition module is used to acquire a third voltage signal received by the receiving side of the first wheel sensor, and perform ADC conversion on the third voltage signal based on the first reference voltage, and then send the converted third voltage signal to the main control MCU module; the fourth signal acquisition module is used to acquire a fourth voltage signal received by the receiving side of the second wheel sensor, and perform ADC conversion on the fourth voltage signal based on the first reference voltage, and then send the converted fourth voltage signal to the main control MCU module; the FSK signal acquisition module is used to acquire an FSK signal output by the wheel axle detector, and perform ADC conversion on the FSK signal based on the first reference voltage, and then send the converted FSK signal to the main control MCU module; The main control MCU module is used to calculate the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal and the amplitude of the fourth voltage signal, and perform frequency division processing on the FSK signal, generate multiple FSK frequency division signals after the frequency division processing, and calculate the frequency value of each FSK frequency division signal, wherein the main control MCU module is preset with multiple reference values, and each reference value corresponds to the first voltage signal, the second voltage signal, the third voltage signal, the fourth voltage signal and each FSK frequency division signal respectively; the main control MCU module is also used to compare the amplitude of the first voltage signal, the amplitude of the second voltage signal, the amplitude of the third voltage signal, the amplitude of the fourth voltage signal, and the frequency value of each FSK frequency division signal with their corresponding reference values, and generate a first comparison result; The intelligent detection device also includes a coil resistance acquisition module; the coil resistance acquisition module is used to collect resistance characteristic parameters of the first wheel sensor sending side coil, the first wheel sensor receiving side coil, the second wheel sensor sending side coil, or the second wheel sensor receiving side coil, and send the resistance characteristic parameters to the main control MCU module; the main control MCU module is also preset with a reference value corresponding to the resistance characteristic parameter; the main control MCU module is further used to calculate the coil resistance value based on the resistance characteristic parameter, and compare the coil resistance value with the reference value corresponding to the resistance characteristic parameter to generate a second comparison result; The main control MCU module is also used to calculate the frequency value of the first voltage signal and the frequency value of the second voltage signal, wherein the main control MCU module is also preset with a frequency reference value corresponding to the first voltage signal and a frequency reference value corresponding to the second voltage signal; the main control MCU module is used to compare the frequency value of the first voltage signal with the frequency reference value corresponding to the first voltage signal, and compare the frequency value of the second voltage signal with the frequency reference value corresponding to the second voltage signal to generate a third comparison result.

2. The intelligent detection device for axle counting signal source equipment according to claim 1, characterized in that: The coil resistance acquisition module includes a first operational amplifier unit and a second operational amplifier unit; the non-inverting input terminal of the first operational amplifier unit is connected to the first voltage output terminal of the power supply module, the inverting input terminal of the first operational amplifier unit is connected to the output terminal of the first operational amplifier unit, and the output terminal of the first operational amplifier unit is also connected to the non-inverting input terminal of the second operational amplifier unit; the inverting input terminal of the second operational amplifier unit is used to be connected to the first end of the transmitting side coil of the first wheel sensor, and the ground terminal of the second operational amplifier unit is used to be connected to the second end of the transmitting side coil of the first wheel sensor; or; the inverting input terminal of the second operational amplifier unit is used to be connected to the first end of the receiving side coil of the first wheel sensor, and the ground terminal of the second operational amplifier unit is used to be connected to the second end of the transmitting side coil of the first wheel sensor; The grounding terminal is used to be connected to the second end of the receiving side coil of the first wheel sensor; or; the inverting input terminal of the second operational amplifier unit is used to be connected to the first end of the sending side coil of the second wheel sensor, and the grounding terminal of the second operational amplifier unit is used to be connected to the second end of the sending side coil of the second wheel sensor; or; the inverting input terminal of the second operational amplifier unit is used to be connected to the first end of the receiving side coil of the second wheel sensor, and the grounding terminal of the second operational amplifier unit is used to be connected to the second end of the receiving side coil of the second wheel sensor; the inverting input terminal of the second operational amplifier unit is also connected to the output terminal of the second operational amplifier unit via the first feedback resistor, and the output terminal of the second operational amplifier unit is connected to the first acquisition terminal of the main control MCU module.

3. The intelligent detection device for axle counting signal source equipment according to claim 2, characterized in that: The first signal acquisition module includes a third operational amplifier unit and a first ADC conversion unit, wherein the non-inverting input terminal of the third operational amplifier unit is used to be connected to the positive output terminal of the first voltage signal of the sending side of the first wheel sensor, the inverting input terminal of the third operational amplifier unit is used to be connected to the negative output terminal of the first voltage signal of the sending side of the second wheel sensor, the non-inverting output terminal of the third operational amplifier unit is connected to the first input terminal of the first ADC conversion unit, the inverting output terminal of the third operational amplifier unit is connected to the second input terminal of the first ADC conversion unit, the reference voltage terminal of the first ADC conversion unit is used to receive the first reference voltage generated by the power module, and the output terminal of the first ADC conversion unit is connected to the second acquisition terminal of the main control MCU module; The second signal acquisition module includes a fourth operational amplifier unit and a second ADC conversion unit. The non-inverting input terminal of the fourth operational amplifier unit is used to be connected to the positive output terminal of the second voltage signal on the sending side of the second wheel sensor, the inverting input terminal of the fourth operational amplifier unit is used to be connected to the negative output terminal of the second voltage signal on the sending side of the second wheel sensor, the non-inverting output terminal of the fourth operational amplifier unit is connected to the first input terminal of the second ADC conversion unit, the inverting output terminal of the fourth operational amplifier unit is connected to the second input terminal of the second ADC conversion unit, the reference voltage terminal of the second ADC conversion unit is used to receive the first reference voltage generated by the power supply module, and the output terminal of the second ADC conversion unit is connected to the third acquisition terminal of the main control MCU module.

4. The intelligent detection device for an axle counting signal source device according to claim 3, characterized in that: The third signal acquisition module includes a fifth operational amplifier unit and a third ADC conversion unit, wherein the non-inverting input terminal of the fifth operational amplifier unit is used to be connected to the positive output terminal of the third voltage signal on the receiving side of the first wheel sensor, the inverting input terminal of the fifth operational amplifier unit is used to be connected to the negative output terminal of the third voltage signal on the receiving side of the first wheel sensor, the non-inverting output terminal of the fifth operational amplifier unit is connected to the first input terminal of the third ADC conversion unit, the inverting output terminal of the fifth operational amplifier unit is connected to the second input terminal of the third ADC conversion unit, the reference voltage terminal of the third ADC conversion unit is used to receive the first reference voltage generated by the power module, and the output terminal of the third ADC conversion unit is connected to the fourth acquisition terminal of the main control MCU module; The fourth signal acquisition module includes a sixth operational amplifier unit and a fourth ADC conversion unit. The non-inverting input terminal of the sixth operational amplifier unit is used to be connected to the positive output terminal of the fourth voltage signal on the receiving side of the second wheel sensor, and the inverting input terminal of the sixth operational amplifier unit is used to be connected to the negative output terminal of the fourth voltage signal on the receiving side of the second wheel sensor. The non-inverting output terminal of the sixth operational amplifier unit is connected to the first input terminal of the fourth ADC conversion unit, and the inverting output terminal of the sixth operational amplifier unit is connected to the second input terminal of the fourth ADC conversion unit. The reference voltage terminal of the fourth ADC conversion unit is used to receive the first reference voltage generated by the power supply module, and the output terminal of the fourth ADC conversion unit is connected to the fifth acquisition terminal of the main control MCU module.

5. The intelligent detection device for axle counting signal source equipment according to claim 4, characterized in that: The FSK signal acquisition module includes a seventh operational amplifier unit and a fifth ADC conversion unit. The non-inverting input terminal of the seventh operational amplifier unit is used to be connected to the positive terminal of the FSK signal output of the wheel axle detector, the inverting input terminal of the seventh operational amplifier unit is used to be connected to the negative terminal of the FSK signal output of the wheel axle detector, the non-inverting output terminal of the seventh operational amplifier unit is connected to the first input terminal of the fifth ADC conversion unit, the inverting output terminal of the seventh operational amplifier unit is connected to the second input terminal of the fifth ADC conversion unit, the reference voltage terminal of the fifth ADC conversion unit is used to receive the first reference voltage generated by the power supply module, and the output terminal of the fifth ADC conversion unit is connected to the sixth acquisition terminal of the main control MCU module.

6. The intelligent detection device for axle counting signal source equipment according to claim 5, characterized in that: The intelligent detection device also includes a detection probe and a multi-way switching module; the positive pole of the detection probe is used to be connected to the first voltage signal output positive end of the first wheel sensor sending side, or the second voltage signal output positive end of the second wheel sensor sending side, or the third voltage signal output positive end of the first wheel sensor receiving side, or the fourth voltage signal output positive end of the second wheel sensor receiving side, or the FSK signal output positive end of the axle detector, or the first end of the first wheel sensor sending side coil, or the first end of the first wheel sensor receiving side coil, or the first end of the second wheel sensor sending side coil, or the first end of the second wheel sensor receiving side coil; the negative pole of the detection probe is used to be connected to the first voltage signal output positive end of the first wheel sensor sending side The positive terminal of the detection probe is connected to the negative terminal of the second voltage signal output of the sending side of the second wheel sensor, the negative terminal of the third voltage signal output of the receiving side of the first wheel sensor, the negative terminal of the fourth voltage signal output of the receiving side of the second wheel sensor, the negative terminal of the FSK signal output of the wheel axle detector, the second end of the sending side coil of the first wheel sensor, the second end of the receiving side coil of the first wheel sensor, the second end of the sending side coil of the second wheel sensor, or the second end of the receiving side coil of the second wheel sensor; the multi-way switching module is used to connect or disconnect the positive pole of the detection probe and the non-inverting input terminal of the third operational amplifier unit, the non-inverting input terminal of the fourth operational amplifier unit, the non-inverting input terminal of the fifth operational amplifier unit, the non-inverting input terminal of the sixth operational amplifier unit, and the non-inverting input terminal of the seventh operational amplifier unit. The multi-way switching module is used to connect the positive electrode of the detection probe to the inverting input terminal of the third operational amplifier unit, the inverting input terminal of the fourth operational amplifier unit, the inverting input terminal of the fifth operational amplifier unit, the inverting input terminal of the sixth operational amplifier unit, the inverting input terminal of the seventh operational amplifier unit and the ground terminal of the second operational amplifier unit; at the same time, the multi-way switching module only connects the connection between the positive electrode of the detection probe and one of the ports among the inverting input terminal of the third operational amplifier unit, the inverting input terminal of the fourth operational amplifier unit, the inverting input terminal of the fifth operational amplifier unit, the inverting input terminal of the sixth operational amplifier unit, the inverting input terminal of the seventh operational amplifier unit and the inverting input terminal of the second operational amplifier unit; when the multi-way switching module connects the detection probe When the multi-way switching module connects the positive electrode of the detection lead to the non-inverting input terminal of the third operational amplifier unit, the connection between the negative electrode of the detection lead and the inverting input terminal of the third operational amplifier unit is also connected; when the multi-way switching module connects the positive electrode of the detection lead to the non-inverting input terminal of the fourth operational amplifier unit, the connection between the negative electrode of the detection lead and the inverting input terminal of the fourth operational amplifier unit is also connected; when the multi-way switching module connects the positive electrode of the detection lead to the non-inverting input terminal of the fifth operational amplifier unit, the connection between the negative electrode of the detection lead and the inverting input terminal of the fifth operational amplifier unit is also connected; when the multi-way switching module connects the positive electrode of the detection lead to the non-inverting input terminal of the sixth operational amplifier unit, the connection between the negative electrode of the detection lead and the inverting input terminal of the sixth operational amplifier unit is also connected;When the multi-way switching module connects the positive electrode of the test lead to the non-inverting input terminal of the seventh operational amplifier unit, it also connects the negative electrode of the test lead to the inverting input terminal of the seventh operational amplifier unit; when the multi-way switching module connects the positive electrode of the test lead to the inverting input terminal of the second operational amplifier unit, it also connects the negative electrode of the test lead to the ground terminal of the second operational amplifier unit.

7. The intelligent detection device for an axle counting signal source device according to claim 1, characterized in that: The intelligent detection device further includes an interactive display module, which is connected to the power supply module and the main control MCU module respectively.

8. The intelligent detection device for an axle counting signal source device according to claim 1, characterized in that: The intelligent detection device further comprises a printing interface module, which is connected to the power supply module and the main control MCU module respectively.

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