CN2852145Y - Portable orbit transition resistance testing device - Google Patents
Portable orbit transition resistance testing device Download PDFInfo
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- CN2852145Y CN2852145Y CN 200520078199 CN200520078199U CN2852145Y CN 2852145 Y CN2852145 Y CN 2852145Y CN 200520078199 CN200520078199 CN 200520078199 CN 200520078199 U CN200520078199 U CN 200520078199U CN 2852145 Y CN2852145 Y CN 2852145Y
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Abstract
The utility model relates to a portable orbit transition resistance testing device, which is composed of a constant current power supply which is controlled by a single-chip computer, two testing devices which can measure orbit voltage and orbit current, and a control display device which are connected with one another. The constant current power supply can adjust current and voltage. The data information exchange among the control display device and two testing devices which measure the orbit voltage and the orbit current is carried out through a wireless digital serial communication way. When in the test time, the control display device sends testing instructions to the testing device, and the testing device starts test after the testing instructions are received. After the test, testing results are sent back to the control display device to carry out data processing, and the transition resistance value is computed and obtained to be displayed directly. The utility model has simple structure, portability, convenient operation and high measurement precision.
Description
One, technical field
The utility model relates to portable railway transition resistance proving installation, is particularly useful for the measurement of railway, subway, light rail transition resistance.
Two, background technology
At present, the orbit transfer resistance measurement is when locomotive is stopped transport, and manually uses megger to test respectively in the different test points of track, writes down the test data of each point, calculates orbit transfer resistance according to computing formula at last.The drawback that this traditional method of testing exists is that the test job amount is big, low precision.
Three, summary of the invention
In order to overcome the problem that prior art exists, the purpose of this utility model provides a kind of portable railway transition resistance proving installation easy, time saving and energy saving, that precision is high of testing.
The utility model portable railway transition resistance proving installation, it is by the constant-current supply of monolithic processor controlled adjustable current voltage, the measurement mechanism of voltage and track current between two measured 10m rails that single-chip microcomputer is housed, several parts of control display device are formed.The constant-current supply of adjustable current voltage provides the dc constant flowing power of setting voltage and electric current in advance to track, and the data information exchange that control display device and two measure between the measurement mechanism of voltage and track current between the 10m rail is to be undertaken by the wireless digital serial communication mode.The device of adjustable voltage and electric current adopts one-chip machine port to link to each other with the input port of a field effect transistor driver, the LO port of field effect transistor driver links to each other with the grid of field effect transistor IRFP250 (Q1), the drain electrode of field effect transistor links to each other with an inductance one end, the other end of inductance links to each other with two electric capacity, and it is continuous with the common point of three resistance R 2, R3, R4, the source electrode of field effect transistor links to each other with power supply, the other end of two electric capacity links to each other with ground, three resistance are in parallel with an amplifier input terminal, and the output terminal of amplifier links to each other with an analog quantity input of single-chip microcomputer.Single-chip microcomputer judges by the monitoring of magnitude of voltage on two resistance of sampling whether foreign current is the electric current of setting.The single-chip microcomputer of the measurement mechanism of voltage and track current is ATMEGA8 (IC5) between measurement 10m rail, the wiring of track current signal is connected with the input end of differential operational amplifier, the output of operational amplifier inserts the A/D converter input port of single-chip microcomputer, a resistance links to each other with the RG pin of amplifier, is used to change the enlargement factor of operational amplifier.Voltage signal is received the end of resistance R 7 and R8 between rail, the other end short circuit of resistance R 7 and R8, the two ends of resistance R 7 and differential operational amplifier AD620 (IC7)+IN is connected with-IN, the output of operational amplifier IC7 inserts the AD converter input port ADC0/PC0 of single-chip microcomputer IC5, resistance R 6 is received two RG pins of amplifier (IC7), and single-chip microcomputer is connected with radio receiving transmitting module (IC4).Single-chip microcomputer IC5 is connected with radio receiving transmitting module (IC4), be used to receive test control command that the control display device sends and the single-chip microcomputer that transmits test result control display device (4) and be (IC8), single-chip microcomputer IC8 is connected with charactron display interface chip (IC10) with keyboard, keyboard is connected 5 charactron IC11 and 8 bit keyboard IC12 with charactron display interface chip IC 10, be respectively applied for to show measurement result data and input operation order.Single-chip microcomputer IC8 is connected with radio receiving transmitting module (IC9), is used for the test control command sent to measurement mechanism and acceptance test data.
The utility model portable railway transition resistance proving installation, abandoned the method for testing that adopts when the conventional rails transition resistance is measured fully, do not need to use the data of each test point of megger manual measurement, only need install this proving installation at the scene, come control survey by the control display fully, measurement result directly shows, passes through storage battery power supply, it is simple in structure, easy to operate, the measuring accuracy height, easy to carry, whole test process does not need manual intervention, make test process very convenient, reduced the test job amount, improved testing efficiency, measuring accuracy is improved greatly, have practicality widely.
Four, description of drawings
Fig. 1 is the utility model test principle figure.
Fig. 2 is the constant-current power supply circuit schematic diagram of adjustable current voltage.
Fig. 3 is measurement mechanism circuit theory diagrams of measuring voltage and track current between the 10m rail.
Fig. 4 is control display device circuit theory diagrams.
Five, embodiment
Below in conjunction with an embodiment in the accompanying drawing utility model is further described:
The utility model portable railway transition resistance proving installation, as shown in Figure 1, device 1 is the voltage and current constant-source with adjustable, its electric current output is connected to track A, the B two ends, device 2 is for measuring the measurement mechanism of voltage and track current between the 10m rail, during measurement between rail voltage be connected to the C of track one side, the E two ends, track current is connected to the C of track one side, the D two ends, C, the distance at the D two ends 10m of being separated by, device 3 is for measuring the measurement mechanism of voltage and track current between the 10m rail, voltage is connected to the F of track one side between rail, the H two ends, track current is connected to the F of track one side, the G two ends, F, the distance at the G two ends 10m of being separated by, the device 4 for control display device, during measurement the operator hand held in.Shown in Figure 2: the power supply of the device of adjustable voltage and electric current is provided by accumulator, in order to reach the purpose of output continuous current, system adopts the square wave of the OC1A/PB1 port output PWM pulse width variability of single-chip microcomputer IC1 ATMEGA8, drive the break-make of field effect transistor Q1 IRFP250 by field effect transistor driver IC 2 IR2110, become the constant DC source by inductance L 1 and capacitor C 3 and C4 filtering then.By monitoring to sampling resistor R3 and the last magnitude of voltage of R4, judge whether foreign current is the electric current of setting, in case outside electric current changes, the PWM of ATMEGA8 single-chip microcomputer output also changes, with the electric current instability that this fluctuation that compensates external loading causes, form the constant current source of a closed-loop control.P1 is the input terminal of battery feed, after the direct supply input, through capacitor C 1 and C2 filtering, by becoming square-wave signal behind the field effect transistor IRFP250, the LO pin of the control termination field effect transistor driver IC 2 of field effect transistor, square-wave signal becomes the Constant Direct Current signal through L1 after C3 and the C4 filtering, by connection terminal P2 output, the effect of diode D1 is to provide path to guarantee that circuit board can safe operate as normal for inverse current.Resistance R 3 and R4 are converted to voltage with output current, after the amplifying circuit that voltage signal process operational amplifier IC3 LM358 and resistance R 2, adjustable resistance R1 constitute amplifies, enter the input pin ADC0/PC0 of the AD converter of single-chip microcomputer IC1, carry out analog quantity to the conversion of digital quantity, thus the size of output current as can be known.Detected current value is compared with predefined current value, single-chip microcomputer IC1 adjusts the pwm signal of output, export by pin OC1A/PB1, insert LIN pin through field effect transistor driver IC 2, the pwm signal that its output pin LO output is adjusted is controlled field effect transistor, realizes constant Current Control.Shown in Figure 3: 10m track current signal is by measuring the voltage of 10m track, measuring resistance divided by the 10m track obtains, the voltage signal of 10m track inserts connection terminal P3, P3 insert respectively operational amplifier IC6AD620 input end+IN and-IN, small-signal is carried out differential amplification, adjustable resistance R5 is used to adjust the enlargement factor of differential amplifier, the output pin OUT of operational amplifier IC6 inserts the AD converter input pin ADC1/PC1 of single-chip microcomputer IC5 ATMEGA8, and single-chip microcomputer IC5 samples to signal and carries out the AD conversion.Voltage measurement between the 10m track is by after resistance R 7 and the R8 dividing potential drop, 7 liang of end signals of resistance R directly enter operational amplifier IC7 AD620 input end+IN and-IN, signal is through differential amplification, the output pin OUT of operational amplifier IC7 inserts the AD converter input pin ADC0/PC0 of single-chip microcomputer IC5, single-chip microcomputer is realized the conversion to digital quantity of signals sampling and analog quantity by programmed control.Single-chip microcomputer IC5 is connected with radio receiving transmitting module IC4 PTR2000, the PC6/RESET of single-chip microcomputer IC5, PD0/RXD are connected with DI with CS, the DO of radio receiving transmitting module IC4 respectively with the PD1/TXD pin, realize sheet choosing and serial data exchange respectively, the PD7 pin of single-chip microcomputer IC5 is connected with the TXEN of radio receiving transmitting module IC4, the receipts that are used to control radio receiving transmitting module with send out, finally realize receiving the test control command that the control display device sends and transmit test result.Shown in Figure 4: the single-chip microcomputer that the control display device is used is IC8 ATMEGA8, single-chip microcomputer IC8 is connected with radio receiving transmitting module IC9 PTR2000, single-chip microcomputer IC8 sends test command by the measurement mechanism of radio receiving transmitting module IC9 voltage and track current between the 10m rail, receives measurement data simultaneously.The PC6/RESET of single-chip microcomputer IC8, PD0/RXD and PD1/TXD pin respectively with the CS of radio receiving transmitting module IC9, DO is connected with DI, realize sheet choosing and serial data exchange respectively, the PD7 pin of single-chip microcomputer IC8 is connected with the TXEN of radio receiving transmitting module IC9, be used to control the receipts of radio receiving transmitting module and send out, the input of user's measuring operation and parameter is undertaken by keyboard, operational order prompting and measurement result show by charactron, single-chip microcomputer IC8 is connected with charactron display interface chip IC 10CH451 with keyboard, the ADC0/PC0 of single-chip microcomputer IC8, ADC1/PC1, ADC2/PC2 and ADC3/PC3 respectively with the DCLK of interface chip IC10, DIN, LOAD is connected with DOUT, shows the exchange with keyboard data.The pin SEG0 of keyboard and charactron display interface chip IC 10, SEG1, SEG2, SEG3, SEG4, SEG5, SEG6, SEG7 respectively with the segment encode a of charactron, b, c, d, e, f, g, h, the line S0 of dp and 2 * 8 keyboard matrixs, S1, S2, S3, S4, S5, S6, S7 connects, the pin DIG0 of interface chip IC10, DIG1, DIG2, the bit code DO of DIG3 and DIG4 and 5 charactrons, D1, D2, D3, D4 connects, the pin DIG0 of interface chip IC10, the alignment D0 of DIG1 and 2 * 8 keyboard matrixs, D1 connects, and keyboard and charactron display interface chip read the key assignments signal and the good digital shows signal of decoding is sent to charactron from keyboard and show.
Claims (4)
1. portable railway transition resistance proving installation, it is characterized in that: it is by the constant-current supply (1) of monolithic processor controlled adjustable current voltage, measurement mechanism (2) and (3) of voltage and track current between two measured 10m rails that single-chip microcomputer is housed, a control display device (4) is formed.
2. portable railway transition resistance proving installation according to claim 1, it is characterized in that: the device (1) of adjustable voltage and electric current adopts the OC1A/PB1 port of single chip computer AT MEGA8 (IC1) to link to each other with the LIN port of field effect transistor driver IR2110 (IC2), the L0 port of IR2110 (IC2) links to each other with the grid of field effect transistor IRFP250 (Q1), the drain electrode of field effect transistor IRFP250 (Q1) links to each other with inductance L 1 one ends, its other end links to each other with C4 and resistance R 3 with capacitor C 3, the common point of R4 links to each other, the source electrode of field effect transistor IRFP250 (Q1) links to each other with power supply VCC, capacitor C 3 links to each other with ground with C4, resistance R 3, input end+IN of the two ends of R4 and amplifier LM325 and-IN is in parallel, the output terminal of amplifier LM325 links to each other with the ADC0/PC0 of single chip computer AT MEGA8 (IC1).
3. portable railway transition resistance proving installation according to claim 1, it is characterized in that: the voltage and the measurement mechanism (2) of track current and the single-chip microcomputer of (3) are ATMEGA8 (IC5) between measurement 10m rail, the wiring of track current signal and differential operational amplifier AD620 (IC6)+IN is connected with-IN, the output of operational amplifier (IC6) inserts the AD converter input port ADC1/PC1 of single-chip microcomputer IC5,1 of R5 and AD620 (IC6) links to each other with 8 pin, voltage signal is received the end of resistance R 7 and R8 between rail, the other end short circuit of resistance R 7 and R8, the two ends of resistance R 7 and differential operational amplifier AD620 (IC7)+IN is connected with-IN, the output of operational amplifier IC7 inserts the AD converter input port ADC0/PC0 of single-chip microcomputer IC5, resistance R 6 is received 1 and 8 pin of AD620 (IC7), and single-chip microcomputer IC5 is connected with radio receiving transmitting module PTR2000 (IC4).
4. portable railway transition resistance proving installation according to claim 1, it is characterized in that: the single-chip microcomputer of control display device (4) is ATMEGA8 (IC8), single-chip microcomputer IC8 is connected with charactron display interface chip CH451 (IC10) with keyboard, keyboard is connected 5 charactron IC11 and 8 bit keyboard IC12 with charactron display interface chip IC 10, be respectively applied for demonstration measurement result data and input operation order, single-chip microcomputer IC8 is connected with radio receiving transmitting module PTR2000 (IC9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078199 CN2852145Y (en) | 2005-11-29 | 2005-11-29 | Portable orbit transition resistance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078199 CN2852145Y (en) | 2005-11-29 | 2005-11-29 | Portable orbit transition resistance testing device |
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| CN2852145Y true CN2852145Y (en) | 2006-12-27 |
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| CN 200520078199 Expired - Fee Related CN2852145Y (en) | 2005-11-29 | 2005-11-29 | Portable orbit transition resistance testing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539922A (en) * | 2012-02-20 | 2012-07-04 | 中国矿业大学 | Device and method for testing DC (Direct Current) traction reflux track resistance |
| CN106199201A (en) * | 2016-09-20 | 2016-12-07 | 中铁第勘察设计院集团有限公司 | Urban track traffic rail ground transition resistance test system and method |
| CN106771636A (en) * | 2017-03-09 | 2017-05-31 | 成都瑞尔维轨道交通技术有限公司 | Rail transition resistance detecting system and method |
| CN107976583A (en) * | 2017-11-23 | 2018-05-01 | 上海远彭电气技术咨询服务有限公司 | A kind of urban track traffic rail ground transition resistance automatic testing equipment and method |
-
2005
- 2005-11-29 CN CN 200520078199 patent/CN2852145Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539922A (en) * | 2012-02-20 | 2012-07-04 | 中国矿业大学 | Device and method for testing DC (Direct Current) traction reflux track resistance |
| CN106199201A (en) * | 2016-09-20 | 2016-12-07 | 中铁第勘察设计院集团有限公司 | Urban track traffic rail ground transition resistance test system and method |
| CN106199201B (en) * | 2016-09-20 | 2023-06-27 | 中铁第一勘察设计院集团有限公司 | Urban rail transit rail-ground transition resistance test system and method thereof |
| CN106771636A (en) * | 2017-03-09 | 2017-05-31 | 成都瑞尔维轨道交通技术有限公司 | Rail transition resistance detecting system and method |
| CN107976583A (en) * | 2017-11-23 | 2018-05-01 | 上海远彭电气技术咨询服务有限公司 | A kind of urban track traffic rail ground transition resistance automatic testing equipment and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061227 Termination date: 20101129 |