CN214122271U - Portable electric locomotive speed sensor testing arrangement - Google Patents
Portable electric locomotive speed sensor testing arrangement Download PDFInfo
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- CN214122271U CN214122271U CN202120098222.7U CN202120098222U CN214122271U CN 214122271 U CN214122271 U CN 214122271U CN 202120098222 U CN202120098222 U CN 202120098222U CN 214122271 U CN214122271 U CN 214122271U
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 230000003137 locomotive effect Effects 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 12
- 238000012806 monitoring device Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012031 short term test Methods 0.000 description 1
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Abstract
The utility model relates to a portable electric locomotive speed sensor testing arrangement, including setting up test input interface, analog output interface, sensor mounting panel and the human-computer interface on the instrument shelter panel to and set up transmission, step motor, power supply circuit, speed signal detection circuitry, analog speed signal output circuit and the control circuit in the instrument shelter. The equipment is flexible and light, and can be carried to a locomotive by a technician to search for the speed sensor and the line fault condition. The testing device can directly detect the performance of the speed sensor; the speed sensor is matched with a matched line for use, and can simulate and output a speed signal to a locomotive to detect a related line of the speed sensor; and can show corresponding speed, duty cycle, maximum value, minimum, phase place isoparametric on testing arrangement's display screen, reduce the maintenance degree of difficulty and maintenance time greatly, improve maintenance efficiency.
Description
Technical Field
The utility model relates to a speed sensor troubleshooting equipment technical field specifically is a portable electric locomotive speed sensor testing arrangement.
Background
The electric locomotive converts the locomotive speed into a frequency signal through a speed sensor and then transmits the frequency signal to a locomotive monitoring device, thereby realizing the functions of detecting and monitoring the locomotive speed. Once the speed sensor and the related lines thereof have faults, the speed detection deviation of the whole locomotive can be caused, and the normal operation of the locomotive is influenced. At present, technicians search for the faults and judge the faults only by experience, and the purpose of accurately and quickly removing the faults cannot be achieved, so that a portable speed sensor testing device needs to be developed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a portable electric locomotive speedtransmitter testing arrangement, technical staff can utilize this testing arrangement to carry out short-term test to speedtransmitter's each item technical parameter to the accurate speedtransmitter fault condition of judging. Meanwhile, the pulse frequency signal of the speed sensor can be output in a simulated mode through the testing device and a matched line, and the testing device is matched with speed information of a locomotive monitoring device to detect related lines of the speed sensor, so that the line fault condition can be accurately judged.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a portable electric locomotive speed sensor testing device comprises an instrument box internally provided with a panel and a bottom plate, wherein the top of the panel is provided with a test input interface, an analog output interface, a sensor mounting plate and a human-computer interface; the speed sensor output port, the test input interface, the speed signal detection circuit and the control circuit are sequentially connected in series to form a speed sensor fault detection loop; the control circuit, the analog speed signal output circuit, the analog output interface and the locomotive speed monitoring device are sequentially connected in series to form a speed sensor related line detection loop; the power supply circuit is electrically connected with the control circuit, the speed signal detection circuit and the analog speed signal output circuit.
Preferably, the power circuit comprises a 24V to 15V circuit, a 15V to 5V circuit and a 5V to 3.3V circuit of a lithium battery.
Preferably, the 24V to 15V lithium battery circuit consists of a 24V lithium battery, VD-24S05A1 and a peripheral circuit.
Preferably, the 15V to 5V circuit consists essentially of LLM2576S-5.0 and peripheral devices.
Preferably, the 5V to 3.3V circuit is composed of an AMS1117 chip and peripheral circuits.
Preferably, the speed signal detection circuit is composed of a voltage division circuit, a comparator circuit and an inverse proportion amplifying circuit, and the output port of the speed sensor is sequentially connected with the voltage division circuit, the comparator circuit, the inverse proportion amplifying circuit and the control circuit in series.
Preferably, the analog speed signal output circuit consists of an isolation circuit and a transistor driving circuit, and the control circuit is connected with the isolation circuit, the transistor driving circuit and the locomotive speed monitoring device in series in sequence.
Preferably, the control circuit is composed of STM32F103RET6 and its peripheral circuits.
Preferably, step motor and transmission all are furnished with the synchronizing wheel bottom the bottom plate to connect through synchronous belt, 4 support posts that are used for fixed sensor mounting panel are equipped with on the transmission installation base, and the sensor mounting panel is furnished with 4 locating holes that are used for fixed by test speed sensor.
Preferably, the instrument box is provided with an openable top cover, and the instrument box is 445mm long, 320mm wide and 180mm high.
According to the technical scheme, the beneficial effects of the utility model are that:
1. the carrying is convenient: through using the lithium cell power supply, the charger charges, can carry to trouble locomotive by the technical staff and go on troubleshooting, convenient to use.
2. The maintenance efficiency is high: the fault condition of the speed sensor can be directly detected, and the speed sensor can be matched with a matched line to input a speed signal to a locomotive to detect the fault condition of the related line; all detection parameter information is displayed on the display screen, and the overhauling difficulty and the overhauling time are greatly reduced.
3. The comprehensiveness is strong: one piece of equipment contains all functions required by the maintenance of the speed sensor and related circuits thereof, and brings great convenience to maintenance technicians.
Drawings
FIG. 1 is a top view of the instrument container panel of the present invention;
FIG. 2 is a circuit diagram of the lithium battery of the present invention, which is used for converting 24V to 15V;
FIG. 3 is a circuit diagram of the present invention for converting 15V to 5V;
FIG. 4 is a circuit diagram of the present invention for converting 5V to 3.3V;
fig. 5 is a circuit diagram of the speed signal detection circuit of the present invention;
fig. 6 is a circuit diagram of the analog speed signal output circuit of the present invention;
fig. 7 is a control circuit diagram of the present invention;
fig. 8 is a perspective view of the transmission of the present invention;
FIG. 9 is a diagram illustrating the operation procedure for detecting the performance of the speed sensor according to the present invention;
fig. 10 is a diagram of the operation procedure of the speed signal simulation of the present invention.
The labels in the figure are: 1. the device comprises a test input interface, 2, an analog output interface, 3, a sensor mounting plate, 4, a USB interface, 5, a power switch, 6, a human-computer interface, 7, a panel, 8, a bottom plate, 9, a stepping motor, 10, a transmission device, 11 and a support column.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-10, a portable testing device for a speed sensor of an electric locomotive comprises an instrument box with a panel 7 and a bottom plate 8 inside, wherein a testing input interface 1, an analog output interface 2, a sensor mounting plate 3 and a man-machine interface 6 are arranged at the top of the panel 7, a transmission device 10 fixedly mounted at the top of the bottom plate 8 is arranged below the sensor mounting plate 3, the transmission device 10 is used for driving the speed sensor to rotate, a stepping motor 9 for driving the transmission device 10 is also fixedly mounted at the top of the bottom plate 8, a circuit board is arranged in a gap between the panel 7 and the bottom plate 8, and a power circuit, a speed signal detection circuit, an analog speed signal output circuit and a control circuit are arranged on the circuit board; the speed sensor output port, the test input interface 1, the speed signal detection circuit and the control circuit are sequentially connected in series to form a speed sensor fault detection loop; the control circuit, the analog speed signal output circuit, the analog output interface 2 and the locomotive speed monitoring device are sequentially connected in series to form a speed sensor related line detection loop; the power supply circuit is electrically connected with the control circuit, the speed signal detection circuit and the analog speed signal output circuit.
The main functions of the test device include: 1. speed signal detection: the speed sensor can detect a speed signal with a pulse pair value of 15V and 0-120km/h sent by the speed sensor; 2. the analog speed output can output a signal with a peak value of +15V and 0-120 km/speed; 3. the transmission device 10: kinetic energy can be provided for the sensor, so that the sensor rotates at a set speed; 4. the device is provided with a human-computer interface 6 with a 7-inch touch display screen, and parameter information of the test can be set and displayed.
When the testing device works, the power circuit provides power for each path, and the detection circuit collects speed signals and sends the speed signals to the control circuit; and the analog output circuit is controlled by the control circuit to output the speed signal, and all parameter information is displayed on the display screen. The testing device can detect the speed signal output by the speed sensor and can also simulate the speed sensor to provide a simulated speed signal for the locomotive.
The lithium battery is used for supplying power, and is charged by matching the USB interface 4 with a charger, the lithium battery is a 24V/20A.h battery, can continuously work for more than 4 hours after being charged once, and is provided with a battery protection circuit, so that the lithium battery can effectively protect overcurrent, long-time pressure and over-temperature.
As shown in FIG. 2, the 24V to 15V lithium battery circuit consists of a 24V lithium battery, VD-24S05A1 and peripheral circuits. VD-24S05A1 is a current mode DC/DC module power supply, and adopts a current mode architecture of an internal compensation mode, so that stable operation can be realized in a wide input and output voltage range.
As shown in FIG. 3, the 15V to 5V circuit is mainly composed of LLM2576S-5.0 and peripheral devices. The LLM2576S-5.0 device is an efficient fully integrated voltage-stabilizing converter, and the device is an integrated power switch 5. LLM2576S-5.0 is a wide voltage input device with input voltage up to 48V, and the switch can provide output current of up to 3A at 5V output. The power conversion efficiency of the device is as high as 96%.
As shown in FIG. 4, the 5V to 3.3V circuit is composed of the AMS1117 chip and peripheral circuits.
The AMS1117 chip uses a 5V power supply to supply power, the output current can reach 800 mA, and a stable power supply of 3.3V is provided for the MCU.
As shown in fig. 5, the speed signal detection circuit is composed of a voltage division circuit, a comparator circuit and an inverse proportion amplification circuit, and the output port of the speed sensor is connected in series with the voltage division circuit, the comparator circuit, the inverse proportion amplification circuit and the control circuit in sequence. After entering the input end of the circuit, the speed signal is firstly changed into a safe frequency signal with the peak-to-peak absolute value smaller than +3.3V through a voltage division circuit to protect the operational amplifier, then the signal is output as a frequency signal with the peak-to-peak value of +3.3V through a phase inverter circuit, and the signal is clamped through a reversely connected diode to form a +3.3V standard square wave signal. And (3) enabling the standard square wave signals to enter a single chip microcomputer, counting the frequency in the single chip microcomputer to obtain the speed per second, finally transmitting the speed signals to a display screen, and displaying the corresponding speed value km/h on the display screen.
As shown in fig. 6, the analog speed signal output circuit is composed of an isolation circuit and a transistor driving circuit, and the control circuit is connected in series with the isolation circuit, the transistor driving circuit and the locomotive speed monitoring device in sequence. The standard square wave signal is generated by an I/O port distributed by the single chip microcomputer, a speed signal output by the single chip microcomputer is isolated by an optical coupler, a +/-15V standard square wave circuit can be output, and the output speed can be adjusted through the touch screen.
As shown in fig. 7, the control circuit is composed of STM32F103RET6 and its peripheral circuits. The STM32F103RET6 series uses high performance ARM Cortex washer-M332 bit RISC cores with 72MHz operating frequency, built-in high speed memory (up to 512K bytes of flash memory and 64K bytes of SRAM), rich enhanced I/O ports and peripherals coupled to two APB buses. All models of devices contain standard communication interfaces (2I 2C interfaces, 3 SPI interfaces, 2I 2S interfaces, 1 USB OTG full speed interface, 5 USART interfaces, and 2 CAN interfaces), 2 12-bit ADCs, and 4 universal 16-bit timers. When the testing device works, the 3.3V circuit supplies power to the singlechip, the 5V circuit supplies power to the interface circuit, the +15V circuit supplies power to the sensor, the speed signal detection circuit and the analog speed signal output circuit both enter the singlechip through the I/O port, the singlechip processes the speed signal and transmits data to the display screen through serial port communication, and the display screen displays corresponding analog input signal values and analog output signal values. The display screen operation interface can display parameters such as speed, duty ratio, maximum value, minimum value, phase position and the like, has the functions of speed sensor performance detection and speed signal analog output by switching different working modes, and is high in comprehensiveness.
As shown in figure 8, the transmission device 10 is driven by a stepping motor 9 with the torque of 1.0N/M, and the stepping motor 9 and the transmission device 10 are both provided with synchronizing wheels with the diameter of 20mm, fixed on the mounting bottom plate 8 and connected through a synchronizing belt. The mounting base of the transmission device 10 is provided with 4 support columns 11 with the length of 120mm for fixing the sensor mounting plate 3. The sensor mounting plate 3 is provided with 4 positioning holes of 8mm and used for fixing the tested speed sensor and ensuring that the speed sensor body does not rotate in the test.
The instrument box is provided with an openable top cover, the instrument box is 445mm long, 320mm wide and 180mm high,
is convenient to carry. The panel 7 of the test unit has 1 power switch 5 for turning the test unit on or off.
The operating protocol for performance testing of the speed sensor is shown in fig. 9, 1, the testing device is laid flat, and the top cover is opened. 2. And turning on the power supply and waiting for the equipment to start. 3. The sensor to be tested is inserted into the actuator 10 and the plug is connected to the signal input interface of the testing device. 4. And clicking the touch screen to enter a sensor testing interface. 5. The set testing speed can be set digitally, and can also be set by shortcut keys at 20km/h, 40km/h, 80km/h and 120 km/h. 6. And selecting forward rotation test or reverse rotation test, and recording the parameters of each channel after the speed reaches a set speed. 7. Clicking to stop, stopping testing, taking down the sensor, turning off the power supply, arranging the panel 7 and covering the top cover.
The operation protocol for speed signal simulation is shown in fig. 10, 1, the test device is laid flat, and the top cover is opened. 2. And turning on the power supply and waiting for the equipment to start. 3. And connecting the vehicle speed sensor interface with a signal output interface of the testing device. 4. And clicking the touch screen to enter a speed signal simulation interface. 5. The test signal direction is selected. 6. The set test speed can be set digitally, and can also be set rapidly at 20km/h, 40km/h, 80km/h, 100km/h and 120 km/h. 7. Clicking to stop, stopping testing, taking down the sensor, turning off the power supply, arranging the panel 7 and covering the top cover.
It should be noted that the above embodiments are only used for illustrating the present invention, but the present invention is not limited to the above embodiments, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention all fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a portable electric locomotive speed sensor testing arrangement which characterized in that: the instrument box comprises an instrument box body, wherein a panel (7) and a bottom plate (8) are arranged inside the instrument box body, a test input interface (1), an analog output interface (2), a sensor mounting plate (3) and a human-computer interface (6) are arranged at the top of the panel (7), a transmission device (10) fixedly mounted at the top of the bottom plate (8) is arranged below the sensor mounting plate (3), the transmission device (10) is used for driving a speed sensor to rotate, a stepping motor (9) for driving the transmission device (10) is further fixedly mounted at the top of the bottom plate (8), a circuit board is arranged in a gap between the panel (7) and the bottom plate (8), a power circuit, a speed signal detection circuit, an analog speed signal output circuit and a control circuit are arranged on the circuit board, and the control circuit is electrically connected with the human-computer interface (6);
the speed sensor output port, the test input interface (1), the speed signal detection circuit and the control circuit are sequentially connected in series to form a speed sensor fault detection loop;
the control circuit, the analog speed signal output circuit, the analog output interface (2) and the locomotive speed monitoring device are sequentially connected in series to form a speed sensor related line detection loop;
the power supply circuit is electrically connected with the control circuit, the speed signal detection circuit and the analog speed signal output circuit.
2. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: the power supply circuit comprises a circuit for converting 24V into 15V, a circuit for converting 15V into 5V and a circuit for converting 5V into 3.3V.
3. The portable electric locomotive speed sensor testing device according to claim 2, characterized in that: the 24V to 15V circuit of the lithium battery consists of a 24V lithium battery, VD-24S05A1 and a peripheral circuit.
4. The portable electric locomotive speed sensor testing device of claim 3, wherein: the 15V to 5V circuit mainly comprises LLM2576S-5.0 and peripheral devices.
5. The portable electric locomotive speed sensor testing device of claim 4, wherein: the 5V to 3.3V circuit consists of an AMS1117 chip and peripheral circuits.
6. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: the speed signal detection circuit consists of a voltage division circuit, a comparator circuit and an inverse proportion amplifying circuit, and the output port of the speed sensor is sequentially connected with the voltage division circuit, the comparator circuit, the inverse proportion amplifying circuit and the control circuit in series.
7. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: the analog speed signal output circuit consists of an isolation circuit and a transistor driving circuit, and the control circuit is sequentially connected with the isolation circuit, the transistor driving circuit and the locomotive speed monitoring device in series.
8. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: the control circuit is composed of STM32F103RET6 and its peripheral circuits.
9. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: step motor (9) and transmission (10) all are furnished with the synchronizing wheel in bottom plate (8) bottom to connect through synchronous belt, be equipped with 4 support columns (11) that are used for fixed sensor mounting panel (3) on transmission (10) installation base, sensor mounting panel (3) are furnished with 4 locating holes that are used for fixed by test velocity sensor.
10. The portable electric locomotive speed sensor testing device according to claim 1, characterized in that: the instrument box is provided with an openable top cover, and is 445mm long, 320mm wide and 180mm high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120098222.7U CN214122271U (en) | 2021-01-14 | 2021-01-14 | Portable electric locomotive speed sensor testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120098222.7U CN214122271U (en) | 2021-01-14 | 2021-01-14 | Portable electric locomotive speed sensor testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214122271U true CN214122271U (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120098222.7U Active CN214122271U (en) | 2021-01-14 | 2021-01-14 | Portable electric locomotive speed sensor testing arrangement |
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| Country | Link |
|---|---|
| CN (1) | CN214122271U (en) |
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2021
- 2021-01-14 CN CN202120098222.7U patent/CN214122271U/en active Active
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