Signal calibration device of locomotive signal testboard

Abstract

The utility model discloses a signal calibration device of a locomotive signal testboard. The signal calibration device comprises a calibration switch, a peripheral support circuit, a calibration master control module, a channel switching module, an amplification adaptation circuit and a special calibration jack. The calibration master control module detects on-off of the calibration switch through the switch detection circuit and the peripheral support circuit, a signal algorithm enters a frequency shift signal output calibration mode, and an output signal is subjected to upper and lower side frequency square wave processing and is output through the signal output module. And the channel switching module is controlled to switch an output channel to a calibration signal output channel, and a signal is output to the special calibration jack through the amplification adaptation circuit. According to the calibration module provided by the utility model, the calibration of the frequency can be completed only by the oscilloscope, and the instrument requirement and the cost for calibration are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field related to the field of test bench signal calibration, in particular to a signal calibration device for a locomotive signal test bench. Background Art

[0002] The locomotive signal test bench is a device for performing complete index tests on integrated locomotive signal host equipment such as JT-CR2000, JT-C(2000), JT-CZ2000, JT-CZ2000-jd, and JT-CZ2000-kj. The locomotive signal test bench needs to output frequency shift, ZPW2000, UM71, and AC counting signals. The frequency calibration of the signal often requires the use of equipment such as a signal dynamic analyzer. If only an oscilloscope is needed to complete the frequency calibration, the calibration instrument requirements and costs can be reduced, and it is also convenient for operation, use, and maintenance.

[0003] Therefore, we propose a signal calibration device for a locomotive signal test bench to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a signal calibration device for a locomotive signal test bench.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A signal calibration device for a locomotive signal test bench comprises a calibration switch, a peripheral support circuit, a calibration main control module, a channel switching module, an amplification adaptation circuit, and a special calibration jack.

[0007] The calibration main control module detects the on / off state of the calibration switch through the switch detection circuit and the peripheral support circuit, and the signal algorithm enters the frequency-shifted signal output calibration mode. The upper and lower sidebands of the output signal are squared and output through the signal output module. The channel switching module is controlled to switch the output channel to the calibration signal output channel, and the signal is output to the dedicated calibration jack through the amplification and adaptation circuit.

[0008] Preferably, the signal algorithm converts the upper sideband of the frequency-shifted signal into a high level of a square wave signal, and converts the lower sideband of the frequency-shifted signal into a low level of a square wave signal, and a period of a square wave signal is the low frequency of the frequency-shifted signal.

[0009] Preferably, the calibration switch, peripheral support circuit, calibration main control module, channel switching module, amplification adaptation circuit, and dedicated calibration jack are all fixedly arranged on the housing.

[0010] Preferably, a mounting piece is provided on the lower side of the shell, the shell is connected to the mounting piece via a shock absorbing assembly, and the mounting piece is configured to be plate-shaped and fixedly provided with a baffle.

[0011] Preferably, the shock absorbing assembly comprises a plurality of damping shock absorbers arranged between the shell and the mounting member, one end of the damping shock absorbers is fixedly connected to the mounting member respectively, and the other end of the damping shock absorber is fixedly connected to a rubber abutment block and abuts against the shell.

[0012] Preferably, a plurality of slots are provided on the enclosure of the mounting member.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. By setting the calibration mode and setting the calibration mode switch on the test bench device, when an oscilloscope is used for the frequency calibration of the frequency-shifted FSK signal, the problem that the oscilloscope cannot accurately calculate the low-frequency frequency due to the small difference in the signal frequencies of the upper sideband and the lower sideband can be avoided, thereby completing the frequency calibration using only the oscilloscope.

[0014] 2. When the calibration mode switch is turned on, the upper and lower sidebands of the output frequency-shifted FSK signal are squared, which reduces the instrument requirements and costs for calibration and facilitates operation, use and maintenance.

[0015] 3. The overall device has a shock-absorbing effect when in use and is adapted to the working environment when the locomotive is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a system block diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the shell of the utility model.

[0018] In the figure:

[0019] 1 housing, 2 mounting part, 3 damping shock absorber, 4 rubber stop block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-2 A signal calibration device for a locomotive signal test bench is shown, comprising:

[0022] Calibration switch, peripheral support circuit, calibration main control module, channel switching module, amplification adaptation circuit, dedicated calibration jack.

[0023] The calibration main control module detects the on and off of the calibration switch through the switch detection circuit and the peripheral support circuit. When the switch is turned on, the signal algorithm enters the frequency-shifted signal output calibration mode. At this time, the upper and lower sidebands of the output signal are squared and output through the signal output module. The signal algorithm converts the upper sideband of the frequency-shifted signal into a high level of the square wave signal, and the lower sideband of the frequency-shifted signal into a low level of the square wave signal. The period of a square wave signal is the low frequency of the frequency-shifted signal. At the same time, the channel switching module is controlled to switch the output channel to the calibration signal output channel. The signal is output to the dedicated calibration jack through the amplification and adaptation circuit, and the frequency calibration can be completed through an oscilloscope.

[0024] When used specifically, the calibration switch, peripheral support circuit, calibration main control module, channel switching module, amplification adaptation circuit, and special calibration jack are all fixedly arranged on the housing 1. A mounting member 2 is arranged on the lower side of the housing 1, and the mounting member 2 can be used to be fixed on the locomotive. At the same time, in order to adapt to the working state of the locomotive, the housing 1 is connected to the mounting member 2 through a shock absorbing assembly. In some embodiments, specifically, the mounting member 2 is set in a plate shape and is fixedly provided with a fence; the shock absorbing assembly includes a plurality of damping shock absorbers 3 arranged between the housing 1 and the mounting member 2, one end of the damping shock absorber 3 is respectively fixedly connected to the mounting member 2, and the other end of the damping shock absorber 3 is fixedly connected to a rubber block 4 and abuts against the housing 1. The damping shock absorber 3 adopts the existing technology, which can realize the shock absorbing protection of the housing 1 and prevent the vibration of the locomotive from affecting the overall work. The side wall of the housing 1 is provided with a groove corresponding to the rubber block 4, which can realize the limit fixation of the housing 1 and can also assist in shock absorption. In order to facilitate the disassembly and assembly of the housing 1, a plurality of slots are arranged on the fence of the mounting member 2.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A signal calibration device for a locomotive signal test bench, characterized in that: It includes calibration switch, peripheral support circuit, calibration main control module, channel switching module, amplification adaptation circuit, and dedicated calibration jack; The calibration main control module detects the on / off state of the calibration switch through the switch detection circuit and the peripheral support circuit, and the signal algorithm enters the frequency-shifted signal output calibration mode. The upper and lower sidebands of the output signal are squared and output through the signal output module. The channel switching module is controlled to switch the output channel to the calibration signal output channel, and the signal is output to the dedicated calibration jack through the amplification and adaptation circuit.

2. The signal calibration device for a locomotive signal test bench according to claim 1, characterized in that: The signal algorithm converts the upper side frequency of the frequency shift signal into the high level of the square wave signal, and converts the lower side frequency of the frequency shift signal into the low level of the square wave signal. One cycle of the square wave signal is the low frequency of the frequency shift signal.

3. The signal calibration device for a locomotive signal test bench according to claim 1, characterized in that: The calibration switch, peripheral support circuit, calibration main control module, channel switching module, amplification adaptation circuit and dedicated calibration jack are all fixedly arranged on the housing (1).

4. The signal calibration device for a locomotive signal test bench according to claim 3, characterized in that: A mounting member (2) is provided on the lower side of the shell (1); the shell (1) is connected to the mounting member (2) via a shock-absorbing assembly; the mounting member (2) is arranged in a plate shape and is fixedly provided with a baffle.

5. The signal calibration device for a locomotive signal test bench according to claim 4, characterized in that: The shock absorbing assembly comprises a plurality of damping shock absorbers (3) arranged between the housing (1) and the mounting member (2), one end of each damping shock absorber (3) being fixedly connected to the mounting member (2), and the other end of each damping shock absorber (3) being fixedly connected to a rubber stopper (4) and abutting against the housing (1).

6. The signal calibration device for a locomotive signal test bench according to claim 4, characterized in that: A plurality of slots are arranged on the enclosure of the mounting member (2).

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