CN1962338A

CN1962338A - Insulation-free track circuit compensation capacitor on-line active measuring device

Info

Publication number: CN1962338A
Application number: CN 200610102210
Authority: CN
Inventors: 孔令富; 韩佩富; 李林
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2006-11-28
Filing date: 2006-11-28
Publication date: 2007-05-16
Anticipated expiration: 2026-11-28
Also published as: CN100562450C

Abstract

The invention relates to a non-insulated track circuit compensation capacitor online active tester, wherein it comprises signal generate module (3), driving circuit module (4), signal collecting module (5), single chip (6), and display module (7). The invention is characterized in that: the power amplifier of module (4) amplifies the stable signals generated by the quartz crystal vibrator (9) of signal generating module (3) and the accounting frequency-division circuit, and uses the testing detector (8) at one side of two-side driving circuit to actively excite the compensation capacitor (2); the signal collecting module (5) via voltage tracker, band-pass filter module and amplify module (16) collects the response of said capacitor (2), to be fed to the single chip (6) to process A/D conversation, peak check, and capacitor indexing, then display the capacitor value by display module (7). The invention has stable operation, high interference resistance and low cost.

Description

Insulation-free track circuit compensation capacitor on-line active measuring device

Technical field

The present invention relates to a kind of building-out capacitor measurement mechanism, particularly relate to a kind of insulation-free track circuit compensation capacitor on-line active measuring device.

Background technology

At present, the measuring equipment of the special use that general-duty bridge method capacitance measurement equipment and UM71 track circuit are supporting all can't the on-line measurement insulation-free track circuit compensation capacitor, carries out off-line measurement after building-out capacitor can only being unloaded.For the train that moves on the track, the building-out capacitor off-line measurement exists huge potential safety hazard.Though and special-purpose at present UM71 type insulation-free track circuit compensation capacitor in-situ measurement equipment can carry out on-line measurement, but owing to all adopt the passive measurement mode, resolution capability to pincers type current sensor requires very high, improved the equipment complexity, increased the cost of equipment greatly, and equipment volume is bigger, is not easy to carry.

Summary of the invention

At the problems referred to above, the invention provides a kind of insulation-free track circuit compensation capacitor on-line active measuring device, this device productive costs is low, is easy to carry, and safe and reliable.

This device mainly is made up of signal generating module, drive circuit module, signal acquisition module, micro controller system and display module.Signal generating module produces stable pumping signal, after drive circuit module carries out power gain, initiatively encourages building-out capacitor by measuring sonde.Signal acquisition module is gathered the response of building-out capacitor to given excitation by same measuring sonde, after handling by voltage follower, filtering, amplification module, delivering to micro controller system carries out the A/D conversion and carries out the peak value detection, and peak-data demarcated be relevant capacitance value, at last capacitance is shown by display module.

The invention has the beneficial effects as follows: this measurement mechanism can carry out on-line measurement, has reduced staff labor intensity, gets rid of owing to remove the potential safety hazard that building-out capacitor causes.Device has adopted initiatively method of measurement, has reduced test probe quantity, and is easy to use, flexible.Because employing ring current sensor useless, thereby productive costs reduces significantly.Device volume is little, in light weight, good portability, and an employee can independently finish test job.Resisting temperature, electromagnetic interference capability are strong.

Description of drawings

Fig. 1 be the insulation-free track circuit compensation capacitor proving installation and with insulation-free track circuit compensation capacitor bonded assembly fundamental diagram;

Fig. 2 is the signal generating module and the drive circuit module schematic diagram of measurement mechanism;

Fig. 3 is the signal acquisition module schematic diagram of measurement mechanism.

In Fig. 1, Fig. 2 and Fig. 3,1. rail, 2. building-out capacitor, 3. signal generating module, 4. drive circuit module, 5. signal acquisition module, 6. micro controller system, 7. display module, 8. measuring sonde, 9. crystal oscillator, 10,11. decade counters, 12. two divided-frequency modules (comprising two-stage d type flip flop 12A, 12B), 13. Darlington transistor, 14. bilateral driving circuit, 15. voltage followers, 16. bandpass filterings, amplification module.

The specific embodiment

Fig. 1 is an embodiment disclosed by the invention, carry out power gain by the pumping signal that 4 pairs of signal generating module of drive circuit module 3 produce, signal after will being amplified by the signal output part A of measuring sonde 8 and common B is connected on the two ends lead-in wire of the building-out capacitor 2 between the rail 1, building-out capacitor 2 is carried out active encourage.Signal acquisition module 5 is gathered 2 pairs of response signals that initiatively encourage of building-out capacitor by A, the B two ends of measuring sonde 8, and in signal acquisition module 5, it being carried out filtering, amplification, the signal after will handling is again delivered to and is carried out A/D conversion and peak value detection in the micro controller system 6.Peak-data demarcated be cooresponding capacitance, and deliver to display module 7 by micro controller system 6 and show whether change by needs according to the capacitance decision electric capacity that measures for the employee.

Signal generating module 3 is by the 2MHz quartz oscillator 9 of band temperature compensating, two-stage decade counter 10,11 and two divided-frequency module 12 form (see figure 2)s, mouth CLK and two-stage decade counter 10 with quartz oscillator 9,11 clock end CLK links to each other, the carry end RCO of first order decade counter 10 links to each other with the ENP end with the ENT of second stage decade counter, realize 100 frequency dividers, clock end CLK with the first order d type flip flop 12A in 11 carry mouth RCO and the two divided-frequency module 12 is connected again, the mouth Q of first order d type flip flop 12A is linked to each other with the clock end CLK of second stage d type flip flop, such two d type flip flop 12A, 12B has just constituted a two divided-frequency module 12 in native system, just obtained 10kHz square wave excitation signal on the mouth Q of second stage d type flip flop.Power amplifier module 4 is made up of Darlington transistor 13 and bilateral driving circuit 14.The mouth Q of second stage d type flip flop 12B is connected by the base stage of current-limiting resistance with Darlington transistor 13, the collecting electrode of Darlington transistor 13 links to each other with+5V power supply, and the signal of the emitter output of Darlington transistor 13 is exactly the power gain signal to 10kHz square wave excitation signal.The emitter of Darlington transistor 13 is connected with the upper end of the bilateral driving circuit 14 that is made of 1 Ω and 2 Ω resistance, the other end ground connection of 2 Ω resistance, the A end of another termination measuring sonde 8 of 1 Ω resistance, the B end ground connection of measuring sonde 8, the A end of measuring sonde 8 links to each other with the end lead-in wire of building-out capacitor 2, the B end of measuring sonde 8 links to each other with the other end lead-in wire of building-out capacitor 2, therefore 1 Ω resistance, measuring sonde 8, building-out capacitor 2 series connection ground connection.So initiatively pumping signal just has been added to the two ends of building-out capacitor 2.

Signal acquisition module 5 is connected with the inverting input A of voltage follower 15 by the A tip node with measuring sonde 8, then with the mouth B of voltage follower 15 by the resistance (see figure 3) that links to each other with the input end INA of bandpass filtering, amplification module 16, the signal that collects is carried out filtering and amplification, obtain 10kHz single frequency sinusoidal signal, and be entered into the A/D input end of micro controller system 6 by the mouth BPOD of bandpass filtering, amplification module 16.

Micro controller system 6 signal to input under programming control carries out the A/D conversion, and obtains the peak value of 10kHz sinusoidal signal, converts peak signal to relevant capacitance value by demarcating, and again capacitance is outputed to display module and shows, display module adopts LCD.

Claims

1. insulation-free track circuit compensation capacitor on-line active measuring device, it is characterized in that: the mouth CLK of the quartz oscillator 9 of the signal generating module of described device (3) links to each other with the clock end CLK of two-stage decade counter (10,11);

The carry end RCO of first order decade counter (10) links to each other with the ENP end with the ENT of second stage decade counter (11); The clock end CLK of the first order d type flip flop (12A) in the carry mouth RCO of second stage decade counter (11) and the two divided-frequency module (12) is connected;

The mouth Q of second stage d type flip flop (12B) is connected by the base stage of current-limiting resistance with Darlington transistor (13); The emitter of Darlington transistor (13) is connected with the upper end of the bilateral driving circuit (14) that is made of 1 Ω and 2 Ω resistance, the A end of another termination measuring sonde (8) of 1 Ω resistance, the B end ground connection of measuring sonde 8;

The A tip node of measuring sonde (8) is connected with the inverting input A of voltage follower (15), and the mouth B of voltage follower (15) links to each other by the input end INA of resistance with bandpass filtering, amplification module (16); The mouth BPOD of bandpass filtering, amplification module (16) receives the A/D input end of micro controller system (6).

2. insulation-free track circuit compensation capacitor on-line active measuring device according to claim 1, it is characterized in that: the A end of measuring sonde (8) links to each other with the end lead-in wire of building-out capacitor (2), the B end of measuring sonde (8) links to each other with the other end lead-in wire of building-out capacitor (2), 1 Ω resistance, measuring sonde (8) and building-out capacitor (2) series connection ground connection.

3. insulation-free track circuit compensation capacitor on-line active measuring device according to claim 1 and 2, it is characterized in that: the mouth Q of first order d type flip flop (12A) links to each other with the clock end CLK of second stage d type flip flop (12B), and two d type flip flops (12A, 12B) constitute a two divided-frequency module (12).

4. insulation-free track circuit compensation capacitor on-line active measuring device according to claim 1 is characterized in that: the other end ground connection of 2 Ω resistance.