CN214010350U - Electric odometer mileage signal level fluctuation test device for subway vehicle - Google Patents
Electric odometer mileage signal level fluctuation test device for subway vehicle Download PDFInfo
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- CN214010350U CN214010350U CN202120336561.4U CN202120336561U CN214010350U CN 214010350 U CN214010350 U CN 214010350U CN 202120336561 U CN202120336561 U CN 202120336561U CN 214010350 U CN214010350 U CN 214010350U
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Abstract
The utility model discloses a subway vehicle electronic odometer mileage signal level fluctuation test device, which relates to the technical field of electronic information engineering, and comprises a program control power supply unit, a resistance array unit, a main controller unit, a level conversion circuit unit, a LCD display unit, a DC/DC converter unit and an odometer unit, wherein the input end of the program control power supply unit is also connected with the resistance array unit, the input end of the resistance array unit is connected with the main controller unit, the output end of the program control power supply unit is connected with the level conversion circuit unit, the input end of the level conversion circuit unit is also connected with the main controller unit, the output end of the level conversion circuit unit is connected with the odometer unit, the test device simulates signal amplitude fluctuation signals, the design test flow feeds signals to the odometer, and long-time repeated experiments are carried out, which is favorable for improving the accuracy and consistency of test data, thereby improving the working efficiency and the product quality and reducing the production and operation cost of enterprises.
Description
Technical Field
The utility model relates to an electronic information engineering technical field, concretely relates to subway vehicle electron odometer mileage signal level fluctuation test device.
Background
The electronic odometer for subway train is one electronic device for railway train and must meet the requirement of IEC60571 electronic device for railway train.
According to the requirement of the electronic odometer on the level fluctuation of the mileage signal, the test meets the following requirements:
the power input is U1 direct current, and the set period T is 1000ms a pulse, and the pulse width is 500ms, and the pulse amplitude fluctuation is 25% U1, and the count accuracy is not influenced.
The odometer must meet various technical requirements of standard regulations during the design, production and technical service processes. Therefore, a mileage meter test device designed according to technical requirements specified by standards is needed, so that the functional performance of a product can be effectively tested, the quality of the product is ensured, the reliability of the product is improved, and the economic benefit of an enterprise is improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a subway vehicle electron odometer mileage signal level fluctuation test device to solve the problem mentioned in the above-mentioned background art.
A subway vehicle electronic odometer mileage signal level fluctuation test device comprises a program control power supply unit, a resistor array unit, a main controller unit, a level conversion circuit unit, an LCD display unit, a DC/DC converter unit, an odometer unit and an input power supply Vin;
the input power Vin is connected with the input end of the programmable power supply unit, the input end of the input power Vin and the input end of the DC/DC converter unit are connected with the input end of the input power Vin and the input end of the odometer unit, the input end of the programmable power supply unit is also connected with the output end of the resistor array unit, and the input end of the resistor array unit is connected with the output end of the main controller unit;
the output end of the program control power supply unit is connected with the input end of the level conversion circuit unit, the input end of the level conversion circuit unit is further connected with the output end of the main controller unit, the output end of the level conversion circuit unit is connected with the input end of the odometer unit, data are transmitted between the odometer unit and the main controller unit through serial communication, and the output end of the main controller unit is further connected with an LCD display unit.
Preferably, the DC/DC converter unit generates a power VCC to supply power to the main controller unit, the level conversion circuit unit, and the LCD display unit.
Preferably, the chip of the main controller unit is a single chip microcomputer with the model of STC12C5402 AD.
Preferably, the chip model of the DC/DC converter unit is MC34063, and the LCD display unit adopts a display module with a model of LCD 12864.
The utility model has the advantages that: the method comprises the steps of testing the odometer according to the technical requirements of international standard 'IEC 60571 electronic equipment for railway vehicles', simulating signal amplitude fluctuation signals by using a testing device, designing a testing flow to feed signals to the odometer, and carrying out long-time repeated experiments. The automatic data acquisition and processing of the microprocessor are adopted to analyze, process and compare the data, and the product performance and quality are judged according to the test result, so that the accuracy and consistency of the test data are improved, the working efficiency and the product quality are improved, and the production and operation cost of enterprises is reduced.
Drawings
Fig. 1 is a block diagram of the present invention.
In fig. 1, 1: program-controlled power supply unit, 2: resistance array unit, 3: main controller unit, 4: level conversion circuit unit, 5: LCD display unit, 6: DC/DC converter unit, 7: an odometer unit.
Fig. 2 is a circuit diagram of the programmable power supply unit and the level conversion circuit unit of the present invention.
Fig. 3 is a circuit diagram of the main controller unit, the LCD display unit, the DC/DC converter unit and the odometer unit of the present invention.
Fig. 4 is a timing diagram of the mileage signal amplitude variation test procedure of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
A subway vehicle electronic odometer mileage signal level fluctuation test device comprises a program control power supply unit 1, a resistor array unit 2, a main controller unit 3, a level conversion circuit unit 4, an LCD display unit 5, a DC/DC converter unit 6, an odometer unit 7 and an input power supply Vin;
the input power Vin is connected with the input end of the program-controlled power unit 1, the input power Vin is connected with the input end of the DC/DC converter unit 6, and the input power Vin is connected with the input end of the odometer unit; the input end of the program-controlled power supply unit 1 is also connected with the output end of the resistor array unit 2, and the input end of the resistor array unit 2 is connected with the output end of the main controller unit 3;
the output of programme-controlled power supply unit 1 is connected with the input of level transform circuit unit 4, the input of level transform circuit unit 4 still is connected with main control unit 3's output, the output of level transform circuit unit 4 is connected with odometer unit 7's input, pass through serial communication transmission data between odometer unit 7 and the main control unit 3, main control unit 3's output still is connected with LCD display element 5.
In the present embodiment, the DC/DC converter unit 6 generates a power VCC to supply power to the main controller unit 3, the level conversion circuit unit 4, and the LCD display unit 5.
In this embodiment, the chip of the main controller unit 3 is a single chip microcomputer with the model of STC12C5402 AD.
In this embodiment, the chip model of the DC/DC converter unit 6 is MC34063, and the LCD display unit 5 is a display module having a model of LCD 12864.
Connection relation of each pin:
fig. 2 is a circuit diagram of the programmable power supply unit 1 and the level conversion circuit unit 4, wherein: vin is connected with a program-controlled power supply integrated voltage stabilizer U5-3, a U5-2 output V2 is connected with R22, C4 and C5, a U5-2 output V2 is connected with a level conversion circuit R18, and a U5-1 is connected with a resistor array R10, R12 and R14; the resistor array triode Q1-C is connected with R10, Q1-B is connected with R9, Q2-C is connected with R12, Q2-B is connected with R11, Q3-C is connected with R14, Q3-B is connected with R13, and Q1-E, Q2-E, Q3-E is connected with the ground; the level conversion circuit R15 is connected with Q4-B, Q4-C is connected with R16 and R17, R17 is connected with Q5-B, Q5-C output SIG2 is connected with R18 and an odometer DUT1-3, and Q4-E, Q5-E is connected with the ground.
Fig. 3 is a circuit diagram of the main controller unit 3, the LCD display unit 5, the DC/DC converter unit 6, and the odometer unit 7, in which: the U3-26 output LP25 of the main controller is connected with R9 of the resistor array to realize that the pulse signal amplitude is 1.25U1 and the DUT1-3 is applied, the U3-27 output LP0 is connected with R11, the pulse signal amplitude is 1.0U1 and the DUT1-3 is applied, the U3-29 output LN25 is connected with R13, and the pulse signal amplitude is 0.75U1 and the DUT1-3 is applied; the output SIG1 of the U3-30 of the master controller is connected with a level conversion circuit R15; the U3-7 output CS of the main controller is connected with the LCD display U4-4, the U3-8 output SID is connected with U4-5, the U3-9 output SCLK is connected with U4-6, and the U3-5 output L _ SW is connected with R28; the output TXD of the U3-1 of the main controller is connected with an odometer DUT1-6, the output RXD of the DUT1-5 is connected with the U3-32, and serial communication between the main controller and the odometer is realized; r28 of the LCD display is connected with Q6-B, Q6-C is connected with U4-20, and is used for controlling the backlight illumination of the LCD; the DC/DC converter control chip U6-6 is connected with R19, U6-1, U6-7 and U6-8 are connected with R19 in short circuit mode, U6-4 is connected with C8, U6-2 is connected with D1 and L1, U6-5 is connected with R20 and R21, R21 is connected with L1, C6 and C7, and an output power VCC is connected with U3-28, R16, U4-2, U4-17 and U4-19.
The working process and the principle thereof are as follows:
according to IEC60571 international standard, the odometer receives pulse signals with the period T unchanged from the pulse width and the amplitude changed by +/-25%, the test device simulates signal amplitude fluctuation signals, a test flow is designed to feed signals to the odometer, and long-time repeated experiments are carried out. And the data is fed to the microprocessor, the data is analyzed, processed and compared, and the product performance and the product quality are judged according to the test result.
As shown in FIG. 2, the voltage rise and fall of the programmable power supply is realized by a linear adjustable integrated voltage stabilizer LM317 through a main controller adjusting a resistor array, and the principle is that
UO＝(1+R2/R1)×VREF
In the formula, a reference voltage VREF1.25V; resistance R1240 Ω by blending R2The output voltage Uo is adjusted, so that the pulse level of the odometer is adjusted to rise and fall.
The microprocessor automatically controls the test environment and the process, and collects, processes and displays the test data. The test items continuously work for 2 hours according to one sample point in 1 second, the number of the sample points is collected and compared with the theoretical value of 7200 points, and whether the functional performance of the odometer meets the design requirement is checked.
With reference to fig. 2, the programmable power supply unit 1 comprises: taking the power mileage of 24V nominal voltage as an example, the adjustable integrated voltage regulators U5(LM317), R22(240 omega), C4 and C5. The resistor array unit 2 includes: the triodes Q1-Q3(2N2222), R10(5.52K), R12(4.37K), R14(3.22K), R9, R11 and R13. The electronic switches Q1-Q3 are used for controlling the connection of R10, R12 and R14 to the U5-1 adjusting end, so that the U5-2 adjustable output voltage V2 is achieved, and the relations between V2 and R10, R12 and R14 are shown in table 1.
TABLE 1 relationship of V2 with R10, R12, R14
| Resistance (RC) | R10(5.52K) | R12(4.37K) | R14(3.22K) |
| V2(V) | 30.0(1.25U1) | 24.0(1.0U1) | 18.0(0.75U1) |
Referring to fig. 2, the level conversion circuit unit 4 includes: the triodes Q4-Q5(2N2222) and R15-R18 realize the conversion of the signal amplitude from VCC (5V) to V2.
Referring to fig. 3, the Main Controller (MCU) unit 3 includes: microprocessor chip U3(STC12C5402AD) and peripheral components; the DC/DC converter unit 6 includes: chip U6(MC34063), inductor L1, Schottky diode D1(SS16), R19-R21, C6-C8; the LCD display unit 5 includes: a display module U4(LCD12864), a triode Q6(2N2222), and R28. The output TXD of the U3-1 of the main controller is connected with the odometer DUT1-6, and the output RXD of the DUT1-5 is connected with the U3-32, so that the main controller and the odometer are in serial communication.
With reference to fig. 3 and 4, the main controller U3 controls the resistor array and the programmable power supply to implement the mileage signal amplitude variation test process.
Based on the above: the method comprises the steps of testing the odometer according to the technical requirements of international standard 'IEC 60571 electronic equipment for railway vehicles', simulating signal amplitude fluctuation signals by using a testing device, designing a testing flow to feed signals to the odometer, and carrying out long-time repeated experiments. The automatic data acquisition and processing of the microprocessor are adopted to analyze, process and compare the data, and the product performance and quality are judged according to the test result, so that the accuracy and consistency of the test data are improved, the working efficiency and the product quality are improved, and the production and operation cost of enterprises is reduced.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (4)
1. A metro vehicle electronic odometer mileage signal level fluctuation test device is characterized by comprising a program control power supply unit (1), a resistor array unit (2), a main controller unit (3), a level conversion circuit unit (4), a DC/DC converter unit (6), an odometer unit (7) and an input power supply Vin;
the input power Vin is connected with the input end of the programmable power supply unit (1), the input power Vin is connected with the input end of the DC/DC converter unit (6), the input power Vin is connected with the input end of the odometer unit (7), the input end of the programmable power supply unit (1) is also connected with the output end of the resistor array unit (2), and the input end of the resistor array unit (2) is connected with the output end of the main controller unit (3);
the output of programme-controlled power supply unit (1) is connected with the input of level transform circuit unit (4), the input of level transform circuit unit (4) still is connected with the output of main control unit (3), the output of level transform circuit unit (4) is connected with the input of odometer unit (7), pass through serial communication transmission data between odometer unit (7) and main control unit (3), the output of main control unit (3) still is connected with LCD display element (5).
2. The device for testing the level fluctuation of the electric odometer mileage signal of a subway vehicle according to claim 1, wherein the DC/DC converter unit (6) generates a power VCC to power the main controller unit (3), the level conversion circuit unit (4) and the LCD display unit (5).
3. The device for testing the level fluctuation of the mileage signal of a subway vehicle as claimed in claim 1, wherein the chip of the main controller unit (3) is a single chip microcomputer with model number STC12C5402 AD.
4. The device for testing the level fluctuation of the mileage signal of a subway vehicle as claimed in claim 1, wherein the chip model of the DC/DC converter unit (6) is MC34063, and the LCD display unit (5) is a display module of LCD 12864.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120336561.4U CN214010350U (en) | 2021-02-06 | 2021-02-06 | Electric odometer mileage signal level fluctuation test device for subway vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120336561.4U CN214010350U (en) | 2021-02-06 | 2021-02-06 | Electric odometer mileage signal level fluctuation test device for subway vehicle |
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| Publication Number | Publication Date |
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| CN214010350U true CN214010350U (en) | 2021-08-20 |
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| CN202120336561.4U Active CN214010350U (en) | 2021-02-06 | 2021-02-06 | Electric odometer mileage signal level fluctuation test device for subway vehicle |
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- 2021-02-06 CN CN202120336561.4U patent/CN214010350U/en active Active
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