Intelligent train wheel sensor

• US 9,678,238 B2
• Filed: 10/14/2014
• Issued: 06/13/2017
• Est. Priority Date: 10/11/2013
• Status: Expired due to Fees

• Current Assignee: Chengdu Senchuan Technical Co., Ltd.
• Original Assignee: Chengdu Senchuan Technical Co., Ltd.
• Inventors: Chen, Lu
• Primary Examiner(s): Phan, Huy Q
• Assistant Examiner(s): FORTICH, ALVARO E
• Application Number:
  US14/513,825
• Publication Number:
  US 20150102805A1
• Time in Patent Office: 973 Days
• CPC Class Codes: G01V 3/10 using induction coils
• CPC Class Codes: H02J 2207/10 Control circuit supply, e.g. means for supplying power to the control circuit
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0063 with circuits adapted for supplying loads from the battery

Abstract

This disclosure relates to an intelligent train wheel sensor including a permanent magnetic coil and a low-pass filter circuit, an amplifying and shaping circuit, an analog/digital conversion circuit, and an output interface and interface conversion circuit, which are connected to each other in turn. The analog/digital conversion circuit and the output interface and interface conversion circuit being connected to a micro-processing control unit. The permanent magnetic coil is further connected in turn to a rectifier and filter circuit, a power storage circuit, a charging control circuit and rechargeable batteries. The rechargeable batteries supply power to the low-pass filter circuit, the amplifying and shaping circuit, the analog/digital conversion circuit, the micro-processing control unit and the output interface and interface conversion circuit. Such intelligent sensor has high reliability, requires no external power supply, can be installed and maintained conveniently. Furthermore, such intelligent sensor can identify a wheel signal of a low-speed train.

Claims

1. A train wheel sensor to detect train wheels as they pass the sensor, the sensor comprising:

a permanent magnetic coil and a low-pass filter circuit, an amplifying and shaping circuit, an analog/digital conversion circuit, and an output interface and interface conversion circuit, which are directly connected to each other in turn, both the analog/digital conversion circuit and the output interface and interface conversion circuit being connected to a micro-processing control unit; and

the permanent magnetic coil being further directly connected in turn to a rectifier and filter circuit, a power storage circuit, a charging control circuit, and rechargeable batteries,

when the train wheels pass the train wheel sensor, the permanent magnetic coil generates an alternating induced current and an induced voltage;

wherein the alternating induced current charges the power storage circuit after passing through the rectifier and filter circuit, under the control of the charging control circuit, the power storage circuit charges the rechargeable batteries, then the rechargeable batteries supply power to the low-pass filter circuit, the amplifying and shaping circuit, the analog/digital conversion circuit, the micro-processing control unit, and the output interface and interface conversion circuit;

wherein the induced voltage is filtered by the low-pass filter circuit to remove interference, and then amplified and shaped by the amplifying and shaping circuit, under the control of the micro-processing control unit, the analog/digital conversion circuit converts the amplified and shaped signal into a numerical signal, the numerical signal is converted, by the output interface and interface conversion circuit, into a standard Transistor-Transistor Logic (TTL) digital signal or positive/negative square signal, and then transmitted to a rear-end processing apparatus for use.

2. The train wheel sensor according to claim 1, wherein the output interface and interface conversion circuit is further connected to a wireless transmission unit.

3. The train wheel sensor according to claim 2, wherein the wireless transmission unit is further connected to a radio frequency lightning protection unit.

4. The train wheel sensor according to claim 1, wherein the output interface and interface conversion circuit is connected to a lightning protection unit.