CN201707114U

CN201707114U - High-precision rapid pulse metering device

Info

Publication number: CN201707114U
Application number: CN2010202341883U
Authority: CN
Inventors: 张泰丰; 张祖明; 戴继烈; 宋宏良; 徐德芬
Original assignee: Ningbo Shunxun Observation And Control Technology Co Ltd; NINGBO MINGTAI TRAFFIC EQUIPMENT CO Ltd
Current assignee: Ningbo Mingtai Traffic Equipment Co., Ltd
Priority date: 2010-06-23
Filing date: 2010-06-23
Publication date: 2011-01-12
Anticipated expiration: 2020-06-23

Abstract

The utility model relates to a high-precision rapid pulse metering device, which solves the problem that in order to ensure the measuring precision, the time required by a traditional pulse metering device is long, and comprises a flow meter as a standard meter and a flow meter as a meter to be measured with the pulse as the metering output, the standard meter is connected with a pulse timer and counter unit 1, the meter to be measured is connected with a pulse timer and counter unit 2, the input ends of the pulse timer and counter unit 1 and the pulse timer and counter unit 2 are connected to a signal control unit, and the output ends of the pulse timer and counter unit 1 and the pulse timer and counter unit 2 are connected to a micro-processing unit. The utility model is provided with the standard meter and the meter to be measured, modifies the pulses of the meter to be measured by measuring the precision time of the pulse of the standard meter and the pulse of the meter to be measured within a period, and achieves the rapid and accurate metering of a flow meter to be measured which outputs a pulse signal, thereby increasing the working efficiency and saving the resource.

Description

A kind of high-precision and fast pulse metering device

Technical field

The utility model relates to a kind of measuring apparatus, relates in particular to a kind of high-precision and fast pulse metering device.

Background technology

In flow metering, a lot of tested flowmeters are exported with pulse position metering signal, for the full-automatic data acquisition of flow standard equipment brought very big convenient, traditional measuring apparatus, it disposes a pulse signal acquisition module, utilize the tested table umber of pulse in commutation photoelectric signal collection a period of time, in order to guarantee measuring accuracy, by 0.2 grade of flow rate calculation commonly used at present, required acquisition pulse number is generally wanted more than 10000 in the one-shot measurement process, exactly by the lower water meter of ratio of precision, except 0.1 flow point, also to gather 1000 pulses, just 0.1 also need to gather more than 400 at last.The every circle of minimum pointer of general water meter is 1L, the rotating ratio of impeller is roughly 10, calculate by each impeller 6 tooth, gathering 400 pulses roughly needs water consumption to be: the L=400/10/6=6.6 liter, calculate by minimum flow 24L/h, need 17 minutes, obviously traditional pulse metering device measures needed chronic.

Summary of the invention

The utility model has mainly solved traditional pulse metering device in order to guarantee measuring accuracy, measures long problem of required time, and a kind of high-precision and fast pulse metering device is provided.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of high-precision and fast pulse metering device, comprise with the pulse being a flowmeter and a flowmeter of metering output as tested table as standard scale, be connected with pulse timing counting unit one on the standard scale, be connected with pulse timing counting unit two on the tested table, the input end of pulse timing counting unit one and pulse timing counting unit two is connected to a signaling control unit, and the output terminal of pulse timing counting unit one and pulse timing counting unit two is connected on the microprocessing unit.Pulse timing counting unit one and pulse timing counting unit two are respectively applied for standard scale and tested table umber of pulse in a period of time, and first rising edge of a pulse of work beginning back time between first rising edge of a pulse behind the end-of-job carry out record, signaling control unit is used for paired pulses chronoscope counting unit one and pulse timing counting unit two sends the signal that begins and finish, and microprocessing unit is handled the data of record.A kind of preferred version as such scheme, standard scale adopts electromagnetic flowmeter in this pulse metering device, the output frequency of electromagnetic flowmeter is general equal at present can reach 2KHz, what have can reach 10KHz, calculate by range ratio 10, electromagnetic flowmeter per second minimum also can be exported 200 more than the frequency, so for standard scale, can export abundant umber of pulse in one minute, can treat the pulse of electromagnetic flowmeter as full sized pules, utilize the pulse of standard scale and the pulse contrast of tested table, add pulse number and correct time in a difference measurement standard table and tested table one interval, can obtain measuring more exactly the result in a short period of time, thereby improve work efficiency, save the energy simultaneously.

The utility model has the advantages that: be provided with standard scale and tested table, by measuring the precise time of a period of time internal standard table pulse and tested table pulse, revise tested table umber of pulse, reach rapidly and accurately the tested flow instrument with pulse signal output is measured, thereby improved work efficiency, also saved the energy.

Description of drawings

Fig. 1 is a kind of structural frames view of the utility model measuring apparatus;

Fig. 2 is the synoptic diagram that the utility model is sampled in a period of time.

Embodiment:

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is further described.

Embodiment:

A kind of high-precision and fast pulse metering device of present embodiment, as shown in Figure 1, comprise a signaling control unit 1 that beginning and end signal take place, this signaling control unit output terminal is provided with two circuits, be connected respectively on chronoscope counting unit 1 and the chronoscope counting unit 25, chronoscope counting unit one links to each other with a standard scale 2, is used for writing time and this time internal standard table umber of pulse, and this standard scale adopts electromagnetic flowmeter.Link to each other with tested table 3 at chronoscope counting unit two, this tested table need detect the gauging table of its impulse ratio or error exactly.The output terminal of chronoscope counting unit one and chronoscope counting unit two is connected respectively on the microprocessing unit 6.

When this high-precision and fast pulse metering device uses, as shown in Figure 2, signaling control unit sends commencing signal on chronoscope counting unit one and chronoscope counting unit two, pulse signal is waited in chronoscope counting unit one and two zero clearings of chronoscope counting unit then, after receiving commencing signal, run in first pulse signal rising edge, chronoscope counting unit one and chronoscope counting unit two pick up counting respectively and count, as shown in Figure 2, the output frequency of standard scale is higher, at one time in the section, the umber of pulse of standard scale output is more than tested table, and first pulse signal rising edge that chronoscope counting unit one runs into earlier.When measurement will finish, signaling control unit sends an end signal for chronoscope counting unit one and chronoscope counting unit two, chronoscope counting unit one and chronoscope counting unit two continue to wait for pulse signal after receiving end signal, when running into the rising edge of first pulse signal, chronoscope counting unit one and chronoscope counting unit two stop counting and timing respectively, obtain the umber of pulse P1 and the P2 of standard scale and tested table, and time T 1 and T2 between the pulse.Chronoscope counting unit one and chronoscope counting unit two send to detected data in the microprocessing unit respectively and handle, with the time period between T1 replacement measurement beginning and the end, the instrument coefficient of known standard table is K1, then can draw the umber of pulse P=P2*T1/T2 of accurate tested table, type by tested table calculates its impulse ratio or error then, if tested table is turbine, vortex street isopulse COEFFICIENT K 2 ignorant flowmeters, its impulse ratio K2=V1/P2 then, wherein V1 is the standard scale capacity, this standard scale capacity V1=P1/K1.If when tested table is the known metering outfit of impulse ratio K2, can draw tested table capacity V2=P2/K2, V1 is known in addition, just can draw error E=(V2-V1)/V1*100%.

Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Although this paper has used terms such as standard scale, tested table, signaling control unit, micro-control unit morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.

Claims

1. high-precision and fast pulse metering device, it is characterized in that: comprise with the pulse being a flowmeter and a flowmeter of metering output as tested table (3) as standard scale (2), be connected with pulse timing counting unit one (4) on the standard scale, be connected with pulse timing counting unit two (5) on the tested table on (3), the input end of pulse timing counting unit one and pulse timing counting unit two is connected to a signaling control unit (1), and the output terminal of pulse timing counting unit one and pulse timing counting unit two is connected on the microprocessing unit (6).

2. a kind of high-precision and fast pulse metering device according to claim 1 is characterized in that described standard scale (2) is an electromagnetic flowmeter.