CN208569337U

CN208569337U - LVDT displacement sensor D/A converter module

Info

Publication number: CN208569337U
Application number: CN201820066851.XU
Authority: CN
Inventors: 许宁
Original assignee: Luoyang Kai Miao And Control Equipment Co Ltd
Current assignee: Luoyang Kai Miao And Control Equipment Co Ltd
Priority date: 2018-01-16
Filing date: 2018-01-16
Publication date: 2019-03-01
Anticipated expiration: 2028-01-16

Abstract

The utility model discloses a kind of LVDT displacement sensor D/A converter modules, including STC-MCU control module, clock module, WIFI communication module, data memory module, 485 communication modules, AD acquisition module, signal adjustment circuit and sensor interface circuitry, compared with prior art, the utility model realizes the output of the various ways such as multrirange, high-precision, digital-to-analogue voltage and current digital quantity and a variety of communications of wire and wireless.The use of LVDT sensor greatly is facilitated, and only needs simply adjustment that can realize the Multiple Type sensor of the multiple producers in compatible market, it is easy to use, it has the value of popularization and application.

Description

LVDT displacement sensor D/A converter module

Technical field

The utility model relates to intelligent instrumentation field more particularly to a kind of LVDT displacement sensor digital-to-analogue conversion moulds Block.

Background technique

Currently, LVDT displacement sensor manufacturer is numerous, standard is different, and signal frequency interface voltage is different, and range becomes Change to need to generally require each producer from new adjustment output, use process and the regulation of electrical circuit is carried out according to different model.Existing mould Block is only to export analog signal poor universality mostly, and Adjustment precision is low repeatedly, and circuit specification causes to waste more.

Utility model content

The purpose of this utility model is that solve the above-mentioned problems and provides a kind of LVDT displacement sensor digital-to-analogue turn Change the mold block.

The utility model achieves the above object through the following technical schemes:

The utility model includes STC-MCU control module, clock module, WIFI communication module, data memory module, 485 Communication module, AD acquisition module, signal adjustment circuit and sensor interface circuitry, the signal output of the sensor interface circuitry End is connect by the signal adjustment circuit and the AD Acquisition Circuit with the signal input part of the STC-MCU control module, The data transmission terminal of the STC-MCU control module is connect with the data memory module, the nothing of the STC-MCU control module Line signal transmission end is connect with the WIFI communication module, the time signal end of the STC-MCU control module and the clock Module connection, the communication port of the STC-MCU control module are connect with 485 communication module.

The utility model by module carry WiFi function realize it is wireless, and included 485 interfaces realize it is wired, data number The transmission of word amount, while realizing through analog quantity ± 5v, the output of the sensors signal such as 0-5v, 4-20ma carries storage mould Block realizes that setting parameter preservation can more cascade operations.

The utility model is by embedded microcontroller MCU, AD acquisition module, ac driven circuit, 485 telecommunication circuits, Direct current amplification, voltage-current converter circuit, wifi communication module, data storage circuitry, voltage offset electric circuit, realization multrirange ± 50 μm, ± 100 μm, ± 200 μm, ± 500 μm, ± 1000 μm, ± 2000 μm, ± 5000 μm, 0.1 μm of high-precision full accuracy, The output of the various ways such as digital-to-analogue voltage and current digital quantity and a variety of communications of wire and wireless.Greatly facilitate making for LVDT sensor With, and only need simply adjustment that can realize the Multiple Type sensor of the multiple producers in compatible market.

Further, the sensor interface circuitry is amplified by sensor signal ac amplifier circuit and sensor signal direct current Circuit composition.The signal adjustment circuit is made of sensor signal exciting circuit and pumping signal driving circuit.The AD is adopted Collection module is also connected with voltage-current converter circuit, and the AD acquisition module has digital quantity analog output, 485 and simultaneously WIFI communicates output function.

The utility model has the beneficial effects that:

The utility model is a kind of LVDT displacement sensor D/A converter module, compared with prior art, the utility model Realize the output of the various ways such as multrirange, high-precision, digital-to-analogue voltage and current digital quantity and a variety of communications of wire and wireless.It is greatly convenient The use of LVDT sensor, and only need simply adjustment that can realize the Multiple Type sensor of compatible market multiple producers, It is easy to use, it has the value of popularization and application.

Detailed description of the invention

Fig. 1 is the structural principle block diagram of the utility model；

Fig. 2 is the circuit structure schematic diagram of the STC-MCU control module of the utility model；

Fig. 3 is the clock module of the utility model and the circuit structure schematic diagram of data memory module；

Fig. 4 is the WIFI communication module structure principle chart of the utility model；

Fig. 5 is the 485 communication module circuitry structure principle charts of the utility model；

Fig. 6 is the AD acquisition module circuit structure schematic diagram of the utility model；

Fig. 7 is the sensor signal ac amplifier circuit figure of the utility model；

Fig. 8 is the sensor signal DC amplification circuit figure of the utility model；

Fig. 9 is the sensor signal exciting circuit of the utility model；

Figure 10 is the pumping signal driving circuit figure of the utility model；

Figure 11 is the voltage-current converter circuit circuit diagram of the utility model；

Figure 12 is the Voltage to current transducer curve graph of the utility model.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing:

The utility model includes that STC-MCU control module, clock module, WIFI communication module, data are deposited as shown in Figure 1: Store up module, 485 communication modules, AD acquisition module, signal adjustment circuit and sensor interface circuitry, the sensor interface circuitry Signal output end it is defeated by the signal of the signal adjustment circuit and the AD Acquisition Circuit and the STC-MCU control module Enter end connection, the data transmission terminal of the STC-MCU control module is connect with the data memory module, the STC-MCU control The wireless signal transmission end of molding block is connect with the WIFI communication module, the time signal end of the STC-MCU control module It is connect with the clock module, the communication port of the STC-MCU control module is connect with 485 communication module.

System is constituted as shown in Figure 1, LVDT displacement sensor D/A module consists of the following parts STC-MCU control mould Block, clock module, wifi communication module, data memory module, 485 communication modules, AD acquisition module, signal adjustment circuit, biography Sensor interface circuit.

System exchanges enlarged drawing, Fig. 8 sensor signal direct current enlarged drawing, Fig. 9 sensor signal by Fig. 7 sensor signal The composition sensor signal adjustment of the part such as exciting circuit, Figure 10 pumping signal driving circuit and sensor interface circuitry, can be defeated The voltage signal of 0-5V or ± 5v out, voltage signal are passed to the AD Acquisition Circuit as shown in Fig. 6 AD acquisition module simultaneously.It realizes Signal digitlization and analog voltage conversion.

Pass through Figure 11: 0-5V and turn 4-20mA voltage-current converter circuit, voltage signal is switched into electric current output and realizes module Output effect such as Figure 12: voltage and current is completed to convert by electric current output shown in Current Voltage transformation curve figure.Speech voltage electricity Stream output, which is realized, to be completed.

The reading of control circuit and AD data is realized by STC-MCU control module as shown in Figure 2, while control circuit is logical It crosses Fig. 3 clock and memory module realizes parameter store-memory user setting.

Pass through Fig. 4: Wifi interface circuit functional diagram and Fig. 5: 485 communication module circuitry schematic diagrams realize that 485 and wifi is logical Letter realizes that wire and wireless interactively communicates.

It is as shown in figure 11: LM324 operational amplifier operating voltage: direct current 3V~30V Voltage to current transducer implementation method R1 =200 Ω will make it generate 1~5V then the pressure drop that the both ends R1 generate is 0.8~4V when inputting 4~20mA current signal Output voltage, then it is determined that its amplification factor be 1.25, i.e. A=1.25.The amplification factor of in-phase amplification circuit, if R4= 25K, R3=100K meet A=1.25, and the determination and circuit due to R2, R5 parameter do not have much influences, Theoretical Design R2= 100k, R5=10k.Same design obtains 4~20mA/1~5V current/voltage translation circuit.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims

1. a kind of LVDT displacement sensor D/A converter module, it is characterised in that: including STC-MCU control module, clock module, WIFI communication module, data memory module, 485 communication modules, AD acquisition module, signal adjustment circuit and sensor interface electricity Road, the signal output end of the sensor interface circuitry by the signal adjustment circuit and the AD Acquisition Circuit with it is described The signal input part of STC-MCU control module connects, and the data transmission terminal of the STC-MCU control module and the data store Module connection, the wireless signal transmission end of the STC-MCU control module are connect with the WIFI communication module, the STC- The time signal end of MCU control module is connect with the clock module, the communication port of the STC-MCU control module with it is described The connection of 485 communication modules.

2. LVDT displacement sensor D/A converter module according to claim 1, it is characterised in that: the sensor interface Circuit is made of sensor signal ac amplifier circuit and sensor signal DC amplification circuit.

3. LVDT displacement sensor D/A converter module according to claim 1, it is characterised in that: the signal adjustment electricity Routing sensor signal exciting circuit and pumping signal driving circuit composition.

4. LVDT displacement sensor D/A converter module according to claim 1, it is characterised in that: the AD acquisition module It is also connected with voltage-current converter circuit, the AD acquisition module has digital quantity analog output, 485 and WIFI communication simultaneously Output function.