CN201302501Y

CN201302501Y - VW+RTD sensor signal detecting instrument used for large-dam seepage pressure monitoring

Info

Publication number: CN201302501Y
Application number: CNU2008200772308U
Authority: CN
Inventors: 梁志友; 姜建芳; 黄治文
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-16
Filing date: 2008-05-16
Publication date: 2009-09-02
Anticipated expiration: 2018-05-16

Abstract

The utility model relates to large-dam seepage pressure monitoring, in particular to a VW+RTD sensor signal detecting instrument used for large-dam seepage pressure monitoring, which applies MCU (Micro Controlling Unit) technology and computer communication technology. The VW+RTD sensor signal detecting instrument solves the problems of the present large-dam seepage pressure detecting equipment that the utilization range is limited, the cost is high and the like. The detecting instrument comprises a signal collecting circuit and a signal detecting circuit, and further comprises a communication circuit which contains an RS232 communication module and an RS422 communication module. The detecting instrument has the characteristics of reasonable as well as simple structure and convenient utilization. Compared with foreign like products, the detecting instrument has obvious low-cost advantage.

Description

The VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring

Technical field

The utility model relates to the Dam Osmotic Pressure Automatic monitoring, specifically is the VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring of using singlechip technology and computer communication technology.

Background technology

It is an important component part of dam seepage monitoring that Dam Osmotic Pressure Automatic detects, and traditional Dam Osmotic Pressure Automatic detects by hand-held special inspecting equipment field survey of staff and record, the data computation complexity, and working strength is big.Along with the development of automatic technology and the widespread use of computer communication technology, singlechip technology and computer communication technology begin to be applied to Dam Osmotic Pressure Automatic and detect, for example: two kinds of products of MiniLogger, DataAcquisition Systems that U.S. Shinco produces, solved and manually carried out problems such as the data computation complexity, the working strength that exist in the Dam Osmotic Pressure Automatic testing process are big on the spot, but product MiniLogger can only connect a VW+RTD sensor, the cost height only is fit to use the less occasion of VW+RTD number of sensors to use; And Data Acquisition Systems is a whole set of equipment, comprise data recorder, interface module, MUX, parts such as external power source supply and rain insensitive device, can a plurality of VW+RTD sensors be set by MUX, all VW+RTD sensors all are connected to the CDR central data recording device by MUX and interface module, use when being fit to be arranged in the zonule in the VW+RTD set of sensors, if and the distance between the check point very long when big (be the VW+RTD sensor scope that need be provided with) certainly will will increase the length of stube cable widely, so cost is higher.The related background art data of product MiniLogger, Data AcquisitionSystems can be obtained by the http://www.slopeindicator.com of company's site.

Summary of the invention

There are problems such as usable range is limited, cost height in the utility model in order to solve existing Dam Osmotic Pressure Automatic checkout equipment, and a kind of VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring is provided.

The utility model is to adopt following technical scheme to realize: the VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring, comprise signal acquisition circuit, signal deteching circuit, signal acquisition circuit comprises MUX, at least two VW+RTD sensors that output terminal links to each other with MUX, the accumulation signal generator that output terminal links to each other with the oscillator signal end of MUX, that accumulation signal is provided for the VW+RTD sensor; Signal deteching circuit comprises the temperature and pressure signal conditioning circuit that single-chip microcomputer, output terminal link to each other with the single-chip data input end, the input end of temperature and pressure signal conditioning circuit links to each other with the output terminal of MUX, and the control signal end of accumulation signal generator, MUX, temperature and pressure signal conditioning circuit links to each other with the control signal output ends of single-chip microcomputer; Also comprise the communicating circuit that contains RS232 communication module and RS422 communication module, the signal transmission ends of RS232 communication module and RS422 communication module links to each other with the signal transmission ends of single-chip microcomputer.

During use, select the number of detector according to the detection section number of dam to be checked, then, (shown in accompanying drawing 3,4) is connected by its RS232 communication interface first detector with the radio receiving transmitting module that can be connected the RS232 interface, the RS422 interface is by RS232-RS422 adapter and the next detector mutually cascade far away with its distance; Remaining detector once connects by the RS232-RS422 adapter equally, the multistage connection of each detector the most at last, the testing result of each detector transfers to a last detector through the RS232-RS422 adapter, final all testing results transfer to first detector, and upload by first detector and to put host computer, thereby realized the full-automatic detection of osmotic pressure within the long distance range of dam multiple spot.

In addition, according to detecting requirement, the same section of dam generally need detect (as shown in Figure 2) to four osmotic pressure points, therefore, each detector is equipped with 4 VW+RTD sensors, be that the VW+RTD number of sensors that output terminal links to each other with MUX is 4, detector is realized the detection of single detector to four osmotic pressure points by the collection of Single-chip Controlling MUX realization to four VW+RTD sensor signals.

Compared with prior art, detector described in the utility model is provided with RS232 communication interface and RS422 communication interface, make detector to be connected with the radio receiving transmitting module that has the RS232 interface easily, again can be by the next detector cascade mutually far away of RS232-RS422 adapter with distance, realized the full-automatic detection of osmotic pressure within the big dam length distance range, and the detector cascade system greatly reduces the total length of stube cable, simultaneously, can easily realize being connected with more higher leveled internet by the wireless module that can connect the RS232 interface, improve management monitoring level greatly with the upper level management system; In addition, every detector can detect the osmotic pressure situation of 4 points of the same section of dam body simultaneously, has improved plant factor, has reduced cost.Described MUX, accumulation signal generator, temperature and pressure signal conditioning circuit and RS232 communication module and RS422 communication module are the known circuits of electronic technology field, therefore, are not described in instructions.

Described detector is provided with RS232 communication interface and RS422 communication interface simultaneously, based on following reason: the RS232 bus is modal serial communication bus, be widely used as the communication link between system, it is simple and easy, dirigibility and long-term successful use have determined that its continuation is popular, but its poor anti jamming capability, make maximum actual cable length be limited to about 16m, and RS422 bus antijamming capability is strong, maximum actual cable length can reach 1000m, promptly the distance of two detector cascades can be extended to 1000m.

Described VW (Vibrating Wire) sensor is a vibrating string type sensor, be to utilize hydraulic pressure to cause string wire strain variation in the sensor, thereby the principle that causes its natural frequency to change is measured.Be known products, at home and abroad use more, time long, product is comparatively ripe, the transmission frequency signal is anti-ly done strong, the stable performance of ability frequently; Because development along with seepage monitoring, the importance of temperature monitoring is increasing, therefore described detector adopts the VW+RTD sensor of U.S. SLOPE INDICATOR company, this VW+RTD sensor is except that the VW sensor, carry a RTD temperature sensor, detected pressures signal and temperature signal realize that dam multiple spot length is apart from osmotic pressure and temperature detection simultaneously.

The utility model is rational in infrastructure, simple, and is easy to use, and comparing with external like product has tangible low-cost advantage.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is the check point set-up mode figure of dam single section;

Fig. 3 is the typical application system block scheme of signal detecting and measuring apparatus described in the utility model;

Fig. 4 is the cascade synoptic diagram between a plurality of signal detecting and measuring apparatus described in the utility model;

Among the figure: detector is the VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring described in the utility model.

Embodiment

As shown in Figure 1, the VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring, comprise signal acquisition circuit, signal deteching circuit, signal acquisition circuit comprises MUX, at least two VW+RTD sensors that output terminal links to each other with MUX, the accumulation signal generator that output terminal links to each other with the oscillator signal end of MUX, that accumulation signal is provided for the VW+RTD sensor; Signal deteching circuit comprises the temperature and pressure signal conditioning circuit that single-chip microcomputer, output terminal link to each other with the single-chip data input end, the input end of temperature and pressure signal conditioning circuit links to each other with the output terminal of MUX, and the control signal end of accumulation signal generator, MUX, temperature and pressure signal conditioning circuit links to each other with the control signal output ends of single-chip microcomputer; Also comprise the communicating circuit that contains RS232 communication module and RS422 communication module, the signal transmission ends of RS232 communication module and RS422 communication module links to each other with the signal transmission ends of single-chip microcomputer.

During concrete enforcement, single-chip microcomputer adopts the MSP430F149 single-chip microcomputer, and it has advantages such as processing power is strong, travelling speed is fast, low in energy consumption; The MSP430F149 single-chip microcomputer hangs with EEPROM storage chip and Clock management chip outward, to finish information storage and Clock management, is its conventional peripheral setting.

With embankment dyke safety detection is example, according to the requirement of dam safety monitoring model one group of four osmotic pressure check point is set at a certain distance, as shown in Figure 2; Each is organized check point and is distributed on the different longitudinal section of dam, and each group check point is finished the detection task of this group by a VW+RTD sensor signal detection instrument; As shown in Figure 3, select the VW+RTD sensor signal detection instrument of different numbers to finish the osmotic pressure detection of whole dam and the task of uploading of Dam Osmotic Pressure Automatic information according to the scale of dam by cascade; The osmotic pressure of realizing whole dam detects except that need are equipped with the radio receiving transmitting module of a band RS232 interface, also need be equipped with and corresponding many solar powered power supplys of cascade VW+RTD sensor signal detection instrument number and accumulator, solar powered power supply and accumulator are realized by conventional power supply switch circuit the power supply of detector; The PC of upper level management system can carry out wireless telecommunications by wireless receiving module and the detector that is connected with radio receiving transmitting module, receive the osmotic pressure detection information of uploading that Dam Osmotic Pressure Automatic detects many VW+RTD sensor signal detection instrument, by radio receiving transmitting module to multistage detector sending controling instruction, the PC of management system is delivered to remote server, the weather data server of relevant departments by Internet, thereby the multiple spot of realizing dam detects, the Dam Osmotic Pressure Automatic Monitoring System of the high-level management that long range information transmits.

Claims

1, a kind of VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring, comprise signal acquisition circuit, signal deteching circuit, signal acquisition circuit comprises MUX, at least two VW+RTD sensors that output terminal links to each other with MUX, the accumulation signal generator that output terminal links to each other with the oscillator signal end of MUX, that accumulation signal is provided for the VW+RTD sensor; Signal deteching circuit comprises the temperature and pressure signal conditioning circuit that single-chip microcomputer, output terminal link to each other with the single-chip data input end, the input end of temperature and pressure signal conditioning circuit links to each other with the output terminal of MUX, and the control signal end of accumulation signal generator, MUX, temperature and pressure signal conditioning circuit links to each other with the control signal output ends of single-chip microcomputer; It is characterized in that also comprising the communicating circuit that contains RS232 communication module and RS422 communication module, the signal transmission ends of RS232 communication module and RS422 communication module links to each other with the signal transmission ends of single-chip microcomputer.

2, the VW+RTD sensor signal detection instrument that is used for the Dam Osmotic Pressure Automatic monitoring according to claim 1 is characterized in that the VW+RTD number of sensors that output terminal links to each other with MUX is 4.