CN204215209U

CN204215209U - For the signal conditioning circuit of data collector in drawout cubicle

Info

Publication number: CN204215209U
Application number: CN201420722367.XU
Authority: CN
Inventors: 缪良耀
Original assignee: JIANGSU LEMAIDAO NETWORK TECHNOLOGY Co Ltd
Current assignee: JIANGSU LEMAIDAO NETWORK TECHNOLOGY Co Ltd
Priority date: 2014-11-27
Filing date: 2014-11-27
Publication date: 2015-03-18
Anticipated expiration: 2024-11-27

Abstract

The utility model discloses a kind of signal conditioning circuit for data collector in drawout cubicle, comprise the sensor assembly connected successively, multiway analog switch module, pre-amplification circuit module, low-pass filter circuit module, A/D modular converter and single-chip microcomputer, described sensor assembly comprises several sensors, single-chip microcomputer connects multiway analog switch module, multiway analog switch module selects the outputting analog signal of access No. one sensor according to the control signal that the single-chip microcomputer received sends, multiway analog switch module employing model is that analog switch thrown by the hilted broadsword eight of CD4051.The utility model delicate structure, can meet the detection to various environmental parameters, collection and pre-service, and percentage of circuit utilization is high, strong adaptability, data processing accurate, ensure that the data processing performance of whole control system.

Description

For the signal conditioning circuit of data collector in drawout cubicle

Technical field

The utility model relates to the data acquisition technology field of power distribution cabinet, particularly relates to a kind of signal conditioning circuit for data collector in drawout cubicle.

Background technology

Collecting sensor signal is the technology of widespread use in data acquisition system (DAS), because it is easy to use, it is accurate to measure, improves the robotization performance of various control system.In the prior art, often the various parameters in environment are detected, data acquisition and processing (DAP), the sensor of various function is applied to as infrared sensor, humidity sensor, dust sensor etc. in system, therefore reliably also sending the data collected to control center exactly to process, is that whole control system is accurate, the basis of reliability service.In existing Single Chip Microcomputer (SCM) system, mostly be integrated with A/D conversion chip, directly can receive simulating signal, do not need external A/D modular converter, but the electric quantity signal that sensor exports is general comparatively faint, the requirement of single-chip microcomputer to input signal can not be met, so need to carry out pre-service to the output signal of sensor.

In prior art, drawer-type distribution box and the most compact conformation of drawout cubicle, space are less, therefore need a kind of small volume, the data collector for drawout cubicle reasonable in design.

Utility model content

For solving the problem, the utility model provides a kind of signal conditioning circuit for data collector in drawout cubicle, the detection to various environmental parameters, collection and pre-service can be met, pre-service comprises sensor input signal selection, amplification and filtering etc., the utility model delicate structure, easy for installation, percentage of circuit utilization is high, strong adaptability, data processing accurate, ensure that the data processing performance of whole control system.

The technical scheme that the utility model adopts is: a kind of signal conditioning circuit for data collector in drawout cubicle, it is characterized in that: comprise sensor assembly, multiway analog switch module, pre-amplification circuit module, low-pass filter circuit module, A/D modular converter and single-chip microcomputer, described sensor assembly comprises several sensors, the outputting analog signal of each sensor connects the input end of multiway analog switch module, the output terminal of multiway analog switch module connects pre-amplification circuit module successively, low-pass filter circuit module and A/D modular converter amplify, filtering and analog-to-digital conversion process, signal after process sends into the signal input part of single-chip microcomputer, single-chip microcomputer connects multiway analog switch module, multiway analog switch module selects the outputting analog signal of access No. one sensor according to the control signal that the single-chip microcomputer received sends.

Preferably, described multiway analog switch module employing model is that analog switch thrown by the hilted broadsword eight of CD4051, comprise 16 pins, be respectively pin A0 ~ A7, S0 ~ S2, VCC, VEE, GND, INH and A, wherein, pin VCC connects positive source through the first resistance, pin VEE, GND and INH ground connection, pin A0 ~ A7 connects the output terminal of each sensor assembly, pin S0 ~ S2 is the address selection input end that analog switch thrown by this hilted broadsword eight, pin S0 ~ S2 is respectively by the second resistance, 3rd resistance is connected input/output terminal and the pin three of single-chip microcomputer with the 3rd resistance, pin two and pin one, and select a certain road signal in access A0 ~ A7 according to the three bit level logics that the single-chip microcomputer received sends, pin A throws analog switch signal output part for this hilted broadsword eight, pin A connects input end and the pin four of single-chip microcomputer.CD4501 pin function is equivalent to hilted broadsword eight throw switch, and the control signal sent by single-chip microcomputer controls to select to connect a certain road sensor, and it is low in energy consumption, conducting resistance is little, and leakage current is little.

Preferably, described sensor assembly comprises temperature sensor, humidity sensor, pressure transducer, smoke transducer and dust sensor.By the correct position place in drawout cubicle, respective sensor can be installed, detect the ambient conditions in drawout cubicle.

Owing to have employed technique scheme, the utility model has following technique effect: the utility model by arranging multiway analog switch module between sensor assembly and A/D modular converter, the detection to various environmental parameters, collection and pre-service can be realized, pre-service comprises sensor input signal selection, amplification and filtering etc., percentage of circuit utilization is high, strong adaptability, data processing accurate, ensure that the data processing performance of whole control system.

Accompanying drawing explanation

The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the portions of electronics wiring diagram of multiway analog switch.

Embodiment

All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Arbitrary feature disclosed in this instructions, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.

Be illustrated in figure 1 a preferred embodiment of the present utility model, namely for the signal conditioning circuit of data collector in drawout cubicle, comprise sensor assembly, multiway analog switch module, pre-amplification circuit module, low-pass filter circuit module, A/D modular converter and single-chip microcomputer, described sensor assembly comprises several sensors, the outputting analog signal of each sensor connects the input end of multiway analog switch module, the output terminal of multiway analog switch module connects pre-amplification circuit module successively, low-pass filter circuit module and A/D modular converter amplify, filtering and analog-to-digital conversion process, signal after process sends into the signal input part of single-chip microcomputer, single-chip microcomputer connects multiway analog switch module, multiway analog switch module selects the outputting analog signal of access No. one sensor according to the control signal that the single-chip microcomputer received sends.

In the present embodiment, as shown in Figure 2, multiway analog switch module employing model is that analog switch U1 thrown by the hilted broadsword eight of CD4051, comprise 16 pins, be respectively pin A0 ~ A7, S0 ~ S2, VCC, VEE, GND, INH and A, wherein, pin VCC connects positive source through the first resistance R1, pin VEE, GND and INH ground connection, pin A0 ~ A7 connects the output terminal of each sensor assembly, pin S0 ~ S2 is the address selection input end that analog switch U1 thrown by this hilted broadsword eight, pin S0 ~ S2 is respectively by the second resistance R2, 3rd resistance R3 is connected input/output terminal and the pin three of single-chip microcomputer U2 with the 3rd resistance R4, pin two and pin one, and select a certain road signal in access A0 ~ A7 according to the three bit level logics that the single-chip microcomputer U2 received sends, pin A throws analog switch U1 signal output part for this hilted broadsword eight, pin A connects input end and the pin four of single-chip microcomputer U2.CD4501 pin function is equivalent to hilted broadsword eight throw switch, and the control signal sent by single-chip microcomputer controls to select to connect a certain road sensor, and it is low in energy consumption, conducting resistance is little, and leakage current is little.

In the present embodiment, sensor assembly can comprise temperature sensor, humidity sensor, pressure transducer, smoke transducer and dust sensor etc., detects the ambient conditions in drawout cubicle.

The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.

Claims

1. the signal conditioning circuit for data collector in drawout cubicle, it is characterized in that: comprise sensor assembly, multiway analog switch module, pre-amplification circuit module, low-pass filter circuit module, A/D modular converter and single-chip microcomputer, described sensor assembly comprises several sensors, the outputting analog signal of each sensor connects the input end of multiway analog switch module, the output terminal of multiway analog switch module connects pre-amplification circuit module successively, low-pass filter circuit module and A/D modular converter amplify, filtering and analog-to-digital conversion process, signal after process sends into the signal input part of single-chip microcomputer, single-chip microcomputer connects multiway analog switch module, multiway analog switch module selects the outputting analog signal of access No. one sensor according to the control signal that the single-chip microcomputer received sends.

2. the signal conditioning circuit for data collector in drawout cubicle according to claim 1, it is characterized in that: described multiway analog switch module employing model is that analog switch (U1) thrown by the hilted broadsword eight of CD4051, comprise 16 pins, be respectively pin A0 ~ A7, S0 ~ S2, VCC, VEE, GND, INH and A, wherein, pin VCC connects positive source through the first resistance (R1), pin VEE, GND and INH ground connection, pin A0 ~ A7 connects the output terminal of each sensor assembly, pin S0 ~ S2 is the address selection input end that analog switch (U1) thrown by this hilted broadsword eight, pin S0 ~ S2 is respectively by the second resistance (R2), 3rd resistance (R3) is connected input/output terminal and the pin three of single-chip microcomputer (U2) with the 3rd resistance (R4), pin two and pin one, and select a certain road signal in access A0 ~ A7 according to the three bit level logics that the single-chip microcomputer received (U2) sends, pin A throws analog switch (U1) signal output part for this hilted broadsword eight, pin A connects input end and the pin four of single-chip microcomputer (U2).

3. the signal conditioning circuit for data collector in drawout cubicle according to claim 1, is characterized in that: described sensor assembly comprises temperature sensor, humidity sensor, pressure transducer, smoke transducer and dust sensor.