CN-224231869-U - Double-frequency point type locomotive signal ground equipment detector

Abstract

The utility model discloses a double-frequency point type locomotive signal ground equipment detector which comprises a power supply, an MCU, a sine generator, a power amplifying circuit and a current indicating circuit, wherein the MCU is connected with the power supply, the sine generator is connected with the MCU and used for generating a sine signal source, the input end of the power amplifying circuit is connected with the sine generator, the output end of the power amplifying circuit is connected with ground equipment to be detected in an electromagnetic coupling mode, and the current indicating circuit is connected with the power amplifying circuit and used for displaying the coupling condition of the ground equipment to be detected. The detector monitors and visually displays the coupling condition of the ground equipment inductor by utilizing an electromagnetic coupling mode, and can directly check the tuning condition and the action capability of the inductor under the condition that the ground inductor circuit is not cut off.

Inventors

• ZHANG SHUKANG
• TAN XIAOFENG
• LI SHAOJU
• LEI YINGWEI
• GUO CHENG
• CHEN JIONG
• HU YU
• YU FENGGANG
• ZHANG PENG

Assignees

• 昆明铁路局集团科学技术研究所

Dates

Publication Date

20260512

Application Date

20250430

Claims (10)

1. 1. A dual-frequency point locomotive signal ground equipment detector, comprising: A power supply; MCU, connect with said power; the sine generator is connected with the MCU and used for generating a sine signal source; The input end of the power amplifying circuit is connected with the sine generator, and the output end of the power amplifying circuit is connected with the ground equipment to be tested in an electromagnetic coupling mode; and the current indicating circuit is connected with the power amplifying circuit and used for displaying the coupling condition of the ground equipment to be tested.
2. 2. The dual-frequency spot type cab signal ground equipment detector of claim 1, wherein the power amplification circuit includes: and the input end of the amplifier is connected with the sine generator, the output end of the amplifier is connected with the capacitor C3 and the coil Lj, and the coil Lj and a ground inductor coil Ld of the ground equipment to be tested form an electromagnetic coupling circuit.
3. 3. The dual-band spot type cab signal ground equipment detector according to claim 2, wherein the amplifier is an LM386 chip, the pin 2 is grounded, the pin 3 is connected to the sine generator, the pin 4 is grounded, the pin 5 is connected to the capacitor C3, the pin 6 is connected to the power supply, and the pin 7 is grounded after passing through the capacitor C1.
4. 4. The two-frequency spot type cab signal ground equipment detector according to claim 3, wherein the power amplifying circuit further comprises a capacitor C3 and a resistor R1, and the capacitor C2 and the resistor R1 are arranged between the pin 5 and the ground.
5. 5. The dual-frequency point locomotive signal ground equipment detector according to claim 3, wherein a potentiometer is provided between the sine generator and pin 3.
6. 6. The dual-frequency spot type cab signal ground equipment detector of claim 4, wherein the current indicating circuit includes: A coil Lq connected in series with the coil Lj; and an ammeter connected to the coil Lq for measuring the current of the coil Lq.
7. 7. The dual-frequency point type locomotive signal ground equipment detector according to claim 6, wherein the current indicating circuit further comprises a diode D, a current limiting resistor R2 and a filter capacitor C4, the diode D is connected with the current limiting resistor R2, the other end of the current limiting resistor R2 is grounded after passing through the ammeter, and the filter capacitor C4 is connected in series with the current limiting resistor R2.
8. 8. The dual-frequency point mode cab signal ground equipment detector of claim 6, further comprising: the shell, power, MCU, sine generator, power amplifier circuit and current indication circuit all are located in the shell, the ampere meter is located on the shell.
9. 9. The dual-frequency point locomotive signal ground equipment detector according to claim 8, wherein a frequency switch is provided on the housing, the frequency switch being connected to the MCU for switching between 1200Hz and 1700Hz sinusoidal signal sources.
10. 10. The dual-band spot type cab signal ground equipment detector of claim 1, wherein the sine generator includes a phase accumulator, a waveform memory, a digital-to-analog converter, and a low pass filter connected in sequence.

Description

Double-frequency point type locomotive signal ground equipment detector Technical Field The utility model relates to the technical field of locomotive signal ground equipment detection, in particular to a double-frequency point type locomotive signal ground equipment detector. Background The cab signal is composed of ground equipment and on-board equipment. The display of the front ground signal is transmitted to the locomotive through the ground equipment, the display of the front ground signal is decoded by equipment on the locomotive, the display of the front ground signal is displayed on the locomotive again, the driver can confirm conveniently, and corresponding measures are taken in advance. The ground equipment comprises a ground inductor and a tuning box, wherein the ground inductor and the tuning box can form two passive resonant circuits of 1200Hz and 1700Hz, and can form two circuits at the same time or form one circuit independently according to the display state of the ground signal machine so as to transmit information to the locomotive inductor. The dual-frequency point locomotive signal is mutually induced by the locomotive sensor and the ground sensor, and a signal transmission is formed by two frequencies (1200 Hz and 1700 Hz) and two couplings, and the installation of the on-line ground sensor is shown in fig. 8. Each action point is provided with two sensors, and when the locomotive passes through the action point, a signal can be correctly displayed only by receiving two actions. The first inductor of the action point is matched with a single-frequency tuning box (resonating at 1200Hz or 1700 Hz), and the second inductor is matched with a double-frequency tuning box (resonating at 1200Hz or 1700Hz, and also can simultaneously form 1200Hz and 1700Hz resonance). Each station has 3 action points in the up-down direction. The first action point is arranged at 900 m distance from the inbound signal, the second action point is arranged at 400 m distance from the inbound signal, and the first action point and the second action point are displayed by the inbound signal. The third action point is arranged inside the inbound signal machine and is displayed by the outbound signal machine. When the locomotive passes over the ground inductor, electromagnetic coupling action occurs between the locomotive inductor and the ground inductor, so that the resonant current of a corresponding loop of the locomotive inductor is reduced, and the voltage output is reduced. By detecting the voltage value, the information content of the ground can be known. However, the dual-frequency point locomotive signal is only partially used in the meter-gauge railway, manufacturers have stopped production for many years, contradiction between use and maintenance is outstanding, and in order to maintain equipment operation, a ground equipment detector is urgently needed to detect ground equipment, so that positive effects are played for ensuring driving safety. Disclosure of utility model In order to solve the problems, the utility model provides the dual-frequency point type locomotive signal ground equipment detector, sinusoidal signals are generated through the sinusoidal generator, the ground equipment is monitored in an electromagnetic coupling mode, and the dual-frequency point type locomotive signal ground equipment can be detected. Specifically, the utility model is realized as follows: A dual-frequency point locomotive signal ground equipment detector comprising: A power supply; MCU, connect with said power; the sine generator is connected with the MCU and used for generating a sine signal source; The input end of the power amplifying circuit is connected with the sine generator, and the output end of the power amplifying circuit is connected with the ground equipment to be tested in an electromagnetic coupling mode; and the current indicating circuit is connected with the power amplifying circuit and used for displaying the coupling condition of the ground equipment to be tested. Further, the power amplifying circuit includes: and the input end of the amplifier is connected with the sine generator, the output end of the amplifier is connected with the capacitor C3 and the coil Lj, and the coil Lj and a ground inductor coil Ld of the ground equipment to be tested form an electromagnetic coupling circuit. Further, the amplifier is an LM386 chip, the pin 2 of which is grounded, the pin 3 is connected with the sine generator, the pin 4 is grounded, the pin 5 is connected with the capacitor C3, the pin 6 is connected with the power supply, and the pin 7 is grounded after passing through the capacitor C1. Further, the power amplifying circuit further comprises a capacitor C3 and a resistor R1, and the capacitor C2 and the resistor R1 are arranged between the pin 5 and the ground. Further, a potentiometer is arranged between the sine generator and the pin 3. Further, the current indicating circuit includes: A coil Lq con