A multifunctional signal frequency distributor

Abstract

The present invention provides a multifunctional signal frequency distributor, including: a low-pass DC isolation and limiting module, which filters out the DC component and high-frequency noise of the input frequency signal and limits the amplitude; an analog isolation output module, which outputs multi-channel independent undistorted frequency analog signals; a digital square wave output module, which outputs multi-channel independent standard square wave digital signals; a signal generation module, which generates a standard sine wave signal for testing; a self-diagnosis and signal setting module, which is connected to the measuring point in the distributor, measures the signal on the measuring point, and diagnoses the signal and the operation of the measuring point; selects the working mode of the distributor and sets the signal; and a power supply module. When the present invention selects to connect the external frequency signal to the input end, the input frequency signal is divided into a plurality of independent isolated analog signal outputs without distortion or the frequency signal is processed into a standard square wave signal with the same frequency, and is divided into a plurality of independent isolated digital signal outputs.

Description

Technical Field

[0001] The present invention relates to a signal frequency processing device, in particular to a multifunctional signal frequency distributor. Background Art

[0002] Vehicle speed is one of the most important indicators for describing a vehicle's operating status. Acquiring and accurately processing the frequency signal that carries this speed information is crucial for speed control, bearing diagnosis, and vehicle fault detection.

[0003] Vehicle speed includes engine speed, wheel speed, and other parameters, and a variety of sensors are used, including photoelectric sensors, magnetoresistive sensors, magnetoelectric sensors, and Hall sensors. Consequently, the type of frequency signal output varies greatly, potentially taking the form of triangle waves, sine waves, square waves, and other variations. Detection metrics include frequency, amplitude, duty cycle, phase difference, and other indicators. This complicates the subsequent processing of frequency signals. Currently, vehicle speed frequency signal processing is performed by speed sensors and chips and programs specific to these frequency signals, lacking versatility. The output signal is then transmitted directly to the vehicle's control system ECU or vehicle speed test bench, lacking multi-channel scalability for practical detection and diagnosis.

[0004] Judging from various data, the processing of vehicle speed frequency signals, the scalable output of multi-channel isolation, and the standardized output of analog and digital signals are research hotspots.

[0005] A Chinese utility model patent document with publication number CN208479599U discloses a frequency-configurable frequency allocation module comprising a microprocessor circuit, a radio frequency signal processing circuit, and a power supply circuit. The microprocessor circuit receives frequency allocation instructions from a host computer and transmits the frequency allocation instructions to the radio frequency signal processing circuit, while controlling the radio frequency switch to connect the corresponding filter. The radio frequency signal processing circuit distributes the input external radio frequency main signal into no more than N identical radio frequency signals through a power distribution circuit according to the received frequency allocation instructions, and outputs the signals after filtering by a filter circuit. Furthermore, a time-frequency device equipped with this frequency allocation module is also disclosed. The frequency allocation module can be used to allocate radio frequency signals of multiple frequencies, and the module's operating state can be configured according to user needs to achieve the distribution output of multiple frequencies, thereby significantly reducing the design and production workload of the module and improving user convenience and maintainability. Summary of the Invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide a multifunctional signal frequency distributor.

[0007] A multifunctional signal frequency distributor provided by the present invention includes:

[0008] The low-pass DC blocking and limiting module filters out the DC component and high-frequency noise of the input frequency signal and limits the amplitude.

[0009] Analog isolation output module, outputting multi-channel independent undistorted frequency analog signals;

[0010] Digital square wave output module, outputs multi-channel independent standard square wave digital signals;

[0011] Signal generation module, generates standard sine wave signal for testing;

[0012] The self-diagnosis and signal setting module is connected to the measuring points in the distributor, measures the signals at the measuring points, and diagnoses the signals and the operation of the measuring points; selects the working mode of the distributor and sets the signals;

[0013] The power module provides each module with power that meets working requirements.

[0014] Preferably, the analog isolation output module includes a pre-conditioning circuit, an isolation amplifier circuit, and an output conditioning circuit; the signal processed by the low-pass DC isolation and limiting module passes through the pre-conditioning circuit, enters the isolation amplifier circuit, and is then output from the output conditioning circuit as a frequency analog signal.

[0015] Preferably, the analog isolation output module includes multiple groups of isolation amplification circuits and output conditioning circuits to generate multiple groups of mutually isolated frequency analog signals.

[0016] Preferably, the digital square wave output module includes a comparator shaping circuit, a driving circuit, and an optocoupler isolation circuit; the signal processed by the low-pass DC isolation and limiting module passes through the comparator shaping circuit, enters the driving circuit, and then outputs a square wave digital frequency signal from the optocoupler isolation circuit.

[0017] Preferably, the digital square wave output module includes multiple groups of driving circuits and optocoupler isolation circuits to generate multiple groups of mutually isolated square wave digital frequency signals.

[0018] Preferably, the signal generating module includes a single chip microcomputer and a DDS signal generating circuit, and the single chip microcomputer is connected to the DDS signal generating circuit to generate a standard sinusoidal signal.

[0019] Preferably, the signal generating module generates a standard sinusoidal signal as a reference signal for the self-diagnosis and signal setting module.

[0020] Preferably, the power supply module includes a rectifier and voltage regulator module and multiple DD voltage regulator modules; the AC power is output as DC power by the rectifier and voltage regulator module, and then passes through the multiple DD voltage regulator modules to output the required working voltage for other modules.

[0021] Preferably, the self-diagnosis and signal setting module includes a switching circuit and a detection and conditioning circuit. The switching circuit, the detection and conditioning circuit are connected to the single-chip microcomputer to form a calibration self-test and self-diagnosis module. The calibration self-test and self-diagnosis module is connected to the low-pass DC isolation and limiting module, the signal generating module, and the power supply module, and is used to detect the signals at several measuring points in the module, and analyze them to perform self-test and self-diagnosis on the operation of the device.

[0022] Preferably, the self-diagnosis and signal setting module includes a setting button and a display screen. The setting button is connected to the single-chip microcomputer and is used for selecting the working mode and setting the signal; the display screen is connected to the single-chip microcomputer and is used for displaying the system status and signal information.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can choose to connect the external frequency signal to the input terminal or use the built-in standard signal to the input terminal, and has the characteristics of multi-function switchability;

[0025] 2. When the present invention connects an external frequency signal to the input terminal, it can divide the input frequency signal into several independent isolated analog signal outputs without distortion, or process the frequency signal into a standard square wave signal of the same frequency and divide it into several independent isolated digital signal outputs;

[0026] 3. When the present invention uses the built-in standard signal to access the input terminal, the device can output a multi-channel isolated standard sinusoidal analog signal or a multi-channel isolated standard square wave digital signal;

[0027] 4. The calibration self-check and self-diagnosis module of the present invention can diagnose the operating status of the device itself based on the response signals at each measuring point in the device under the input of the built-in standard signal of the device, so as to facilitate the calibration of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0029] Figure 1 A schematic diagram of the system structure of a multifunctional signal frequency distributor of the present invention;

[0030] Figure 2 This is a schematic structural diagram of a power module of a multifunctional signal frequency distributor of the present invention;

[0031] Figure 3 This is a structural diagram of an analog isolation output module and a digital square wave output module of a multifunctional signal frequency distributor of the present invention;

[0032] Figure 4This is a structural diagram of a self-diagnosis and signal setting module and a signal generation module of a multifunctional signal frequency distributor of the present invention;

[0033] Figure 5 A schematic diagram of measuring point settings for a multifunctional signal frequency distributor according to the present invention;

[0034] Figure 6 This is a schematic diagram of output signals of a multifunctional signal frequency distributor of the present invention.

[0035] Description of the accompanying drawings: 100, low-pass DC blocking and limiting module; 200, digital square wave output module; 210, comparator shaping circuit; 221, first drive circuit; 22n, nth drive circuit; 231, first optocoupler isolation circuit; 23n, nth optocoupler isolation circuit; 300, analog isolation output module; 310, pre-conditioning circuit; 321, first isolation amplifier circuit; 32n, nth isolation amplifier circuit; 331, first output conditioning circuit; 33n, nth output conditioning circuit; 400, signal generation module; 410, single-chip microcomputer; 420, DDS signal generation circuit; 500, self-diagnosis and signal setting module; 510, analog channel switching circuit; 520, detection and conditioning circuit; 530, setting button; 540, display screen; 600, power supply module; 610, rectifier and voltage regulator module; 620, DD voltage regulator module V18+; 630, DD voltage regulator module VCC; 640, DD voltage regulator module V18-; 651, DD voltage regulator module D1; 65n, DD voltage regulator module Dn; 661, DD voltage regulator module V1+; 66n, DD voltage regulator module Vn+; 671, DD voltage regulator module V1-; 67n, DD voltage regulator module Vn-. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0037] A multifunctional signal frequency distributor for multi-channel isolated output and digital output of frequency analog signals, such as Figure 1 As shown, it includes: a low-pass DC blocking and limiting circuit 100, a digital square wave output module 200, an analog isolation output module 300, a signal generating module 400, a self-diagnosis and signal setting module 500, and a power supply module 600.

[0038] The original frequency signal is first input into the low-pass DC blocking and limiting circuit 100, which performs pre-low-pass filtering, removes the DC component and performs limiting processing on the frequency signal; then it is input into the digital square wave output module 200, which outputs a number of independent isolated digital signal outputs; or it is input into the analog isolation output module 300, which outputs isolated analog frequency signals.

[0039] like Figure 2 As shown, the specific structure of the power module 600 is provided. The power module 600 includes a rectifier voltage regulator module 610, a DD voltage regulator module V18+620, a DD voltage regulator module VCC 630, a DD voltage regulator module V18-640, a DD voltage regulator module D1 651, a DD voltage regulator module Dn 65n, a DD voltage regulator module V1+661, a DD voltage regulator module Vn+66n, a DD voltage regulator module V1-671 and a DD voltage regulator module Vn-67n.

[0040] The rectifier and voltage regulator module 610 converts the input 220V standard AC power into DC power and outputs it to each DD voltage regulator module. Each DD voltage regulator module converts the DC power output by the rectifier and voltage regulator module 610 into the required operating voltage for the other modules. This includes: DD voltage regulator module V18+620 outputs a standard positive DC power supply; DD voltage regulator module VCC 630 outputs a standard VCC DC power supply; DD voltage regulator module V18-640 outputs a standard negative DC power supply; DD voltage regulator modules D1 651 through Dn 65n output n-channel DC power supplies VCCD1 through VCCDn; DD voltage regulator modules V1+661 through Vn+66n output n-channel DC power supplies VCC+V1 through VCC+Vn; and DD voltage regulator modules V1-671 through Vn-67n output n-channel DC power supplies VCC-V1 through VCC-Vn.

[0041] like Figure 3 Detailed structures of the analog isolated output module 300 and the digital square wave output module 200 are provided. The digital square wave output module 200 includes a comparator shaping circuit 210, a first drive circuit 221, an nth drive circuit 22n, a first optocoupler isolation circuit 231, and an nth optocoupler isolation circuit 23n. The analog isolated output module 300 includes a pre-conditioning circuit 310, a first isolation amplifier circuit 321, an nth isolation amplifier circuit 32n, a first output conditioning circuit 331, and an nth output conditioning circuit 33n.

[0042] The comparator shaping circuit 210 conditions and shapes the input signal into a square wave frequency signal. The first drive circuit 221 to the nth drive circuit 22n and the first optocoupler isolation circuit 231 to the nth optocoupler isolation circuit 23n generate output signals that are correlated with the input signal. The pre-conditioning circuit 310 reduces the amplitude of the input signal to match the input of the isolation amplifier circuit. The first isolation amplifier circuit 321 to the nth isolation amplifier circuit 32n generate output signals that are isolated from the input signal. The first output conditioning circuit 331 to the nth output conditioning circuit 33n condition the output signals of the isolation amplifier circuits, outputting them as undistorted analog frequency signals.

[0043] like Figure 4 As shown, the specific structures of the self-diagnosis and signal setting module 500 and the signal generating module 400 are provided. The signal generating module 400 includes a single-chip microcomputer 410, a DDS signal generating circuit 420, a setting button 430 and a display screen 440; the self-diagnosis and signal setting module 500 includes an analog channel switching circuit 510, a detection and conditioning circuit 520, a setting button 530 and a display screen 540.

[0044] The setting button 530 is connected to the single-chip microcomputer 410 as a user input device for selecting the working mode and setting the signal; the display screen 540 is connected to the single-chip microcomputer 410 as an output device for displaying the system status and signal information; the single-chip microcomputer 410 and the DDS signal generating circuit 420 constitute a signal generating module; the single-chip microcomputer 410 and the analog channel switching circuit 510 and the detection and conditioning circuit 520 constitute a calibration self-test and self-diagnosis module, and the single-chip microcomputer 410 controls the analog channel switching circuit 510 to select the measuring point that currently needs to be connected, and the detection and conditioning circuit 520 performs low-pass filtering and limiting on the signal of the measuring point, and then inputs it into the digital-to-analog conversion channel of the single-chip microcomputer 410, and the single-chip microcomputer 410 detects the signal of the measuring point.

[0045] like Figure 5 As shown in the figure, the specific locations of the measurement points are provided. Measurement point 10 detects the input of the original frequency signal; measurement point 20 detects the output of the low-pass DC blocking and limiting circuit 100; measurement point 30 detects the output of the comparator shaping circuit 210; measurement point 40 detects the output of the pre-conditioning circuit 310; measurement points 51 to 5n respectively detect the outputs of the first drive circuit 221 to the nth drive circuit 22n; and measurement points 61 to 6n respectively detect the outputs of the first isolation amplifier circuit 321 to the nth isolation amplifier circuit 32n.

[0046] like Figure 6The figure shows the specific signal form of each channel output. After passing through the low-pass DC blocking and limiting circuit, the input signal enters the comparator shaping circuit, then passes through the drive circuit and optocoupler isolation circuit, and is output as a digital frequency signal. After passing through the low-pass DC blocking and limiting circuit, the input signal enters the pre-conditioning circuit, then passes through the isolation amplifier circuit and conditioning circuit, and is output as an analog frequency signal.

[0047] Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, and units provided by the present invention in purely computer-readable program code, it is entirely possible to implement the same functions of the system and its various devices, modules, and units provided by the present invention in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; the devices, modules, and units for implementing various functions can also be considered as both software modules implementing the method and structures within the hardware component.

[0048] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0049] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A multifunctional signal frequency distributor, characterized in that: include: A low-pass DC isolation and amplitude limiting module (100) is used to filter out DC components and high-frequency noise from an input frequency signal and to limit the amplitude; An analog isolation output module (300) outputs multi-channel independent undistorted frequency analog signals; A digital square wave output module (200) outputs multi-channel independent standard square wave digital signals; A signal generating module (400) generates a standard sine wave signal for testing; The self-diagnosis and signal setting module (500) is connected to the measuring point in the distributor, measures the signal on the measuring point, and diagnoses the signal and the operation of the measuring point; selects the working mode of the distributor and sets the signal; A power module (600) provides each module with power that meets working requirements; The analog isolation output module (300) comprises a pre-conditioning circuit (310), an isolation amplifier circuit, and an output conditioning circuit; The signal processed by the low-pass DC isolation and limiting module (100) passes through the pre-conditioning circuit (310), enters the isolation amplifier circuit, and is then output from the output conditioning circuit as a frequency analog signal; The analog isolation output module (300) comprises multiple groups of isolation amplification circuits and output conditioning circuits, generating multiple groups of mutually isolated frequency analog signals; The digital square wave output module (200) comprises a comparator shaping circuit (210), a driving circuit, and an optical coupling isolation circuit; The signal processed by the low-pass DC isolation and amplitude limiting module (100) passes through a comparator shaping circuit (210) and then enters a driving circuit, and then outputs a square wave digital frequency signal from an optical coupling isolation circuit; The digital square wave output module (200) comprises a plurality of groups of driving circuits and optical coupling isolation circuits, and generates a plurality of groups of mutually isolated square wave digital frequency signals; The self-diagnosis and signal setting module (500) comprises a switching circuit and a detection and conditioning circuit (520). The switching circuit, the detection and conditioning circuit (520) are connected with the single-chip computer (410) to form a calibration self-diagnosis module. The calibration self-diagnosis module is connected with the low-pass DC isolation and limiting module (100), the signal generation module (400) and the power supply module (600) to detect the signals at several measuring points in the module, analyze them, and perform self-diagnosis on the operation of the device.

2. A multifunctional signal frequency distributor according to claim 1, characterized in that: The signal generating module (400) comprises a single chip microcomputer (410) and a DDS signal generating circuit (420); the single chip microcomputer (410) is connected to the DDS signal generating circuit (420) to generate a standard sinusoidal signal.

3. A multifunctional signal frequency distributor according to claim 2, characterized in that: The signal generation module (400) generates a standard sinusoidal signal as a reference signal for the self-diagnosis and signal setting module (500).

4. A multifunctional signal frequency distributor according to claim 1, characterized in that: The power supply module (600) comprises a rectifying and voltage stabilizing module (610) and a plurality of DD voltage stabilizing modules; the alternating current is outputted as direct current by the rectifying and voltage stabilizing module (610), and then passes through the plurality of DD voltage stabilizing modules to output the required working voltage for other modules.

5. A multifunctional signal frequency distributor according to claim 2, characterized in that: The self-diagnosis and signal setting module (500) comprises a setting button (530) and a display screen (540); the setting button (530) is connected to the single-chip microcomputer (410) and is used for selecting a working mode and setting signals; the display screen (540) is connected to the single-chip microcomputer (410) and is used for displaying system status and signal information.

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