CN203414770U

CN203414770U - Novel pressure transmitter

Info

Publication number: CN203414770U
Application number: CN201320553043.3U
Authority: CN
Inventors: 刘卫东; 陈治国
Original assignee: JIANGSU ZHONGKUANG XINCHUANG NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: JIANGSU ZHONGKUANG XINCHUANG NEW ENERGY TECHNOLOGY Co Ltd
Priority date: 2013-09-06
Filing date: 2013-09-06
Publication date: 2014-01-29
Anticipated expiration: 2023-09-06

Abstract

The utility model relates to a novel pressure transmitter, which comprises a pressure sensor, a digital signal processing module and a signal output interface. The digital signal processing module comprises a signal measuring circuit, a signal conditioning circuit, an A/D converter and a PIC single-chip microcomputer. The pressure sensor, the signal measuring circuit, the signal conditioning circuit, the A/D converter, the PIC single-chip microcomputer and the signal output interface are sequentially connected. The novel pressure transmitter which has a simple structure can make analog signal transmission and unnecessary A/D and D/A conversion operations omitted. After signals acquired by the pressure sensor are conditioned and converted into digital signals, the signals are transmitted in a CAN bus way or an RS 485 way. The requirements of a field bus control system are better satisfied.

Description

A kind of novel pressure transmitter

Technical field

The utility model relates to a kind of voltage measuring apparatus, is specifically related to a kind of novel pressure transmitter, belongs to technology of instrument and meter field.

Background technology

The pressure unit of prior art is generally the two-wire system transformer of the simulating signal of output current, voltage or frequency, and it is measured that receiving sensor sensitive element obtains, and is translated into international standard signal and sends out.Also having small part is the intelligent pressure transmitter based on Hart agreement.

And in current measurement and control area, owing to can introducing and disturb and loss in the transmitting procedure of simulating signal, almost all adopt digitized processing, but, user needs first to convert analog quantity to digital quantity, therefore, and minimum need to conversion through 1 A/D when gaging pressure, even more, and modulus digital-to-analog conversion must bring error.

Therefore, for solving the problems of the technologies described above, necessaryly provide a kind of novel pressure transmitter, to overcome described defect of the prior art.

Utility model content

For addressing the above problem, it is a kind of simple in structure that the purpose of this utility model is to provide, and can save transmission and unnecessary modulus and the novel pressure transmitter of digital-to-analog conversion of simulating signal.

For achieving the above object, the technical scheme that the utility model is taked is: a kind of novel pressure transmitter, and it comprises pressure transducer, digital signal processing module and signal output interface; Wherein, described digital signal processing module comprises circuitry for signal measurement, signal conditioning circuit, A/D converter and PIC single-chip microcomputer; Described pressure transducer, circuitry for signal measurement, signal conditioning circuit, A/D converter, PIC single-chip microcomputer and signal output interface connect successively.

Novel pressure transmitter of the present utility model is further set to: described signal output interface is specially CAN bus interface or is RS485 interface.

Compared with prior art, the utlity model has following beneficial effect: novel pressure structure of transmitter of the present utility model is simple, it can save the transmission of simulating signal and unnecessary modulus and digital-to-analog conversion, the signal that pressure transducer obtains becomes after digital signal through conditioning, adopt CAN bus mode or RS485 mode to transmit, be more suitable for the requirement of field bus control system.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of novel pressure transmitter of the present utility model.

Embodiment

Refer to shown in Figure of description 1, the utility model is a kind of novel pressure transmitter, and it is comprised of several parts such as pressure transducer 1, digital signal processing module 2 and signal output interfaces 3.

Wherein, described digital signal processing module 2 is comprised of several parts such as circuitry for signal measurement 21, signal conditioning circuit 22, A/D converter 23 and PIC single-chip microcomputers 24.

Described pressure transducer 1, circuitry for signal measurement 21, signal conditioning circuit 22, A/D converter 23, PIC single-chip microcomputer 24 and signal output interface 3 connect successively.Described pressure transducer 1 is for induction pressure; 21 pairs of pressure signals of described circuitry for signal measurement are measured, and nurse one's health by signal conditioning circuit 22, then by A/D converter 23, be converted to digital signal, enter signal output interface 3 after being directly changed into corresponding digital pressure value by PIC single-chip microcomputer 24 afterwards.And described PIC single-chip microcomputer 24 has the advantages such as high speed, low-power consumption, antijamming capability be strong.

Described signal output interface 3 is specially CAN bus interface or is RS485 interface, compares with Traditional Transmitters, more meets the requirement of field bus control system to transmitter.

Above embodiment is only the preferred embodiment of this creation, not in order to limit this creation, any modification of making, is equal to replacement, improvement etc., within all should being included in the protection domain of this creation within all spirit in this creation and principle.

Claims

1. a novel pressure transmitter, is characterized in that: comprise pressure transducer, digital signal processing module and signal output interface; Wherein, described digital signal processing module comprises circuitry for signal measurement, signal conditioning circuit, A/D converter and PIC single-chip microcomputer; Described pressure transducer, circuitry for signal measurement, signal conditioning circuit, A/D converter, PIC single-chip microcomputer and signal output interface connect successively.

2. novel pressure transmitter as claimed in claim 1, is characterized in that: described signal output interface is specially CAN bus interface or is RS485 interface.