CN205538025U - Intelligence temperature measuring device based on DSC - Google Patents

Abstract

The utility model discloses an intelligence temperature measuring device based on DSC, including the signal acquisition module, signal pre -processing module, digital signal controller, the command input module, the signal acquisition module includes at least one electron temperature sensor, signal pre -processing module is including drive amplifier circuit and AD buffer circuit, signal output module, signal output module include LCD display, analog output module, 485 communication module and on -off output module, the command input module includes keyboard and quantum digital input module, the electron temperature sensor is connected with digital signal controller through drive amplifier circuit and AD buffer circuit, digital signal controller is connected with LCD display, analog output module, 485 communication module respectively, digital signal controller passes through the isolating driver circuit and is connected with the switching value electricity, digital signal controller is connected with the keyboard electricity, quantum digital input module passes through the optoelectronic isolation circuit and is connected with the digital signal controller electricity.

Description

Intellectual Gauge of Temperature based on DSC

Technical field

This utility model relates to Automation of Hydropower Station equipment technical field, particularly relates to a kind of intelligent temperature based on DSC Measurement apparatus, is mainly used in the temperature measuring unit heat generating components, has that temperature shows, high temperature alarm, data are uploaded Etc. function, it is to improve a kind of smart machine that power station automation level is indispensable.

Background technology

One of most important Monitoring Data when temperature is turbine-generator units operation.Different according to unit capacity, general one Unit can arrange several to tens points for measuring temperature, including: unit bearing bush temperature, lubricating oil temperature, cooling water temperature, Electricity generator stator coil temperature, stator core temperature, electromotor wind duct temperature etc..Tradition thermometric uses mechanical type electric contact Pointer gauge mode, display error is big, and action is unreliable, and fault rate is high.

Utility model content

The technical problems to be solved in the utility model is: provide a kind of Intellectual Gauge of Temperature based on DSC.Should be based on The Intellectual Gauge of Temperature of DSC for measuring the temperature of unit heat generating components, have temperature show, high temperature alarm, number According to the function such as uploading, and then improve power station automation level.

This utility model is adopted the technical scheme that by solving technical problem present in known technology:

A kind of Intellectual Gauge of Temperature based on DSC, at least includes:

Signal acquisition module, this signal acquisition module includes at least one electronic temperature transmitter；

Signal pre-processing module, this signal pre-processing module includes that drive amplification circuit and AD isolate circuit；

Digital signal controller, the model of described digital signal controller is: dsPIC30F6012A；

Signal output module, this signal output module include LCD display, analog output module, 485 communication modules, And switching value output module；

Instruction input module, this instruction input module includes keyboard and switching input module；Wherein:

The lead-out terminal of each electronic temperature transmitter passes sequentially through drive amplification circuit and AD isolation circuit and digital signal The signal input terminal electrical connection of controller；The lead-out terminal of described digital signal controller respectively with LCD display, mould Analog quantity output module, 485 communication module electrical connections；The lead-out terminal of described digital signal controller passes through isolated drive circuit Electrically connect with switching value output module；The I/O terminal of the signal of described digital signal controller electrically connects with keyboard；Described Switching input module is electrically connected with the I/O terminal of the signal of digital signal controller by photoelectric isolating circuit.

Further: the output signal of described analog output module is the current signal of 4～20mA.

This utility model has the advantage that with good effect:

By using technique scheme, owing to the signal acquisition module in this utility model includes at least one electron temperature Sensor；Therefore, during actual signal detects, electronic temperature transmitter is utilized can to detect water wheels rapidly and accurately The temperature of generating set, utilizes signal pre-processing module that the initial signal collected carries out pretreatment, such side simultaneously Face ensure that the intensity of signal, on the other hand improves the reliability of signal；Afterwards the signal that pretreatment completes is sent to Digital signal controller, the signal detected is sent to LCD display and shows by last digital signal controller；With Time, engineer can also send parameter or control by keyboard or switching input module to digital signal controller System instruction；Owing to this technical scheme also includes 485 communication modules and the analog output module of 4～20mA, therefore can Enough connection and connections of other multiple relays realized and control network.

Accompanying drawing illustrates:

Fig. 1 is the structured flowchart of this utility model preferred embodiment；

Fig. 2 is digital signal controller (DSC) circuit theory diagrams of this utility model preferred embodiment；

Fig. 3 is the communication interface circuit schematic diagram of this utility model preferred embodiment；

Fig. 4 is the circuit theory diagrams of the temperature collection circuit of this utility model preferred embodiment；

Fig. 5 is the channel selection circuit schematic diagram of this utility model preferred embodiment；

Fig. 6 is the circuit theory diagrams of the AD isolation circuit of this utility model preferred embodiment；

Fig. 7 is the circuit theory diagrams of the keyboard circuit of this utility model preferred embodiment；

Fig. 8 is the circuit theory diagrams of the LCD liquid crystal display of this utility model preferred embodiment；

Fig. 9 is the circuit theory diagrams of the LED state instruction of this utility model preferred embodiment；

Figure 10 is the circuit theory diagrams of the switching value input circuit of this utility model preferred embodiment.

Detailed description of the invention

For utility model content of the present utility model, feature and effect can be further appreciated that, hereby enumerate following example, and Accompanying drawing is coordinated to describe in detail as follows:

Refer to Fig. 1, a kind of Intellectual Gauge of Temperature based on DSC, including:

Signal acquisition module, this signal acquisition module includes at least one electronic temperature transmitter；

Signal pre-processing module, this signal pre-processing module includes that drive amplification circuit and AD isolate circuit；

Digital signal controller, the model of described digital signal controller is: dsPIC30F6012A；

Signal output module, this signal output module include LCD display, analog output module, 485 communication modules, And switching value output module；

Instruction input module, this instruction input module include keyboard and switching input module；Wherein:

The lead-out terminal of each electronic temperature transmitter passes sequentially through drive amplification circuit and AD isolation circuit and digital signal The signal input terminal electrical connection of controller；The lead-out terminal of described digital signal controller respectively with LCD display, mould Analog quantity output module, 485 communication module electrical connections；The lead-out terminal of described digital signal controller passes through isolated drive circuit Electrically connect with switching value output module；The I/O terminal of the signal of described digital signal controller electrically connects with keyboard；Described Switching input module is electrically connected with the I/O terminal of the signal of digital signal controller by photoelectric isolating circuit.

Further: the output signal of described analog output module is the current signal of 4～20mA.

The operation principle of this preferred embodiment is: signal acquisition module gathers the temperature parameter of hydrogenerator, electron temperature The temperature signal collected is sent and carries out signal amplification to drive amplification circuit by sensor, isolates circuit followed by AD Noise signal is filtered and is sent to digital signal controller, the temperature letter that digital signal controller will receive afterwards Number being sent to LCD display shows, meanwhile, engineer can utilize keyboard to arrange the threshold value of temperature, when temperature is believed Number beyond threshold range time, then digital signal controller send alarm signal, opened to transmission by isolated drive circuit simultaneously Pass amount output module sends out code.And then prevent the generation of peril.

Fig. 2 to Figure 10 is the local circuit schematic diagram of above preferred embodiment；Particularly as follows:

Refer to Fig. 3: U5, U6 are high speed photo coupling, be used for realizing DSC and isolate with external communication circuit electrical, simultaneously It is provided with transmitting-receiving transition display lamp.U9 is 485 communication driving chip.U9 output pin increases varistor, stabilivolt, gas The multiple protections such as body discharge tube, to strengthen the reliability of communicating circuit；

Refer to Fig. 4: sampling resistor is linked into resistance bridge, through two stage amplifer by weak voltage signals linear amplification.U1 Stable voltage reference is provided for resistance bridge.

Referring to Fig. 5: U8 is eight to select an electrical switch, can measure eight road temperature signals by scan mode.DSC is defeated The sheet choosing gone out and address signal, enter into U8 respective pins after light-coupled isolation；

Refer to amplifier and peripheral circuit on the left of the voltage signal entrance of Fig. 6: temperature collection circuit output, double by BO5 Optocoupler, by voltage signal linear isolation, enters into DSC respective pin after increasing driving force after entering into right side amplifier；

Above embodiment of the present utility model is described in detail, but described content has been only preferable reality of the present utility model Execute example, it is impossible to be considered for limiting practical range of the present utility model.All according to this utility model application range made equal Deng change and improvement etc., within all should still belonging to patent covering scope of the present utility model.

Claims (2)

1. an Intellectual Gauge of Temperature based on DSC, it is characterised in that: at least include:

Signal acquisition module, this signal acquisition module includes at least one electronic temperature transmitter；

Signal pre-processing module, this signal pre-processing module includes that drive amplification circuit and AD isolate circuit；

Digital signal controller, the model of described digital signal controller is: dsPIC30F6012A；

Signal output module, this signal output module include LCD display, analog output module, 485 communication modules, And switching value output module；

Instruction input module, this instruction input module includes keyboard and switching input module；Wherein:

The lead-out terminal of each electronic temperature transmitter passes sequentially through drive amplification circuit and AD isolation circuit and digital signal The signal input terminal electrical connection of controller；The lead-out terminal of described digital signal controller respectively with LCD display, mould Analog quantity output module, 485 communication module electrical connections；The lead-out terminal of described digital signal controller passes through isolated drive circuit Electrically connect with switching value output module；The I/O terminal of the signal of described digital signal controller electrically connects with keyboard；Described Switching input module is electrically connected with the I/O terminal of the signal of digital signal controller by photoelectric isolating circuit.

Intellectual Gauge of Temperature based on DSC the most according to claim 1, it is characterised in that: described simulation The current signal that output signal is 4～20mA of amount output module.