CN2133822Y - Multi-user concentrating gas measuring device - Google Patents

Abstract

The utility model relates to a multi-user concentrating gas metering device, which belongs to a gas metering device. The utility model is characterized in that permanent magnet steel is inlaid on one position of the circumference of a gear idle of the existing domestic gas meter, the gear idle revolves one circle, and a two-wire system Hall switch arranged on the corresponding position at the outer part of a cover shell of the domestic gas meter outputs pulsing current according to magnetic signals which are received; sensing units which families have output signals to a microprocessor through corresponding analog switches. The utility model ensures the integrality of the cover shell the original domestic gas meter, and the utility model has the advantage of safety. A portable type keyboard display is used, so the system cost can be reduced.

Description

Multi-user concentrating gas measuring device

The utility model relates to the gas measurement device, more particularly, is a kind ofly to be used to carry out coal gas multi-user centralized measure device by what sensing element, little processing host and keyboard display constituted.

Piped gas is used more and more widely, and the thing followed is the gas measurement problem.All be the mechanical type domestic gas meter that adopts on-the-spot indication in the prior art, it is installed on the indoor gas inlet pipeline of user.The statistician must copy note from door to door, its workload is big, work efficiency low apparent.

The purpose of this utility model is to utilize mechanical type domestic gas meter of the prior art, revolution signal in its counting mechanism is passed through long-distance transmissions, to outdoor microprocessor system, thereby avoid the deficiencies in the prior art part, provide a kind of coal gas multi-user centralized measure device, to raise the management level, to improve statistician's work efficiency, to alleviate its labour intensity.

The purpose of this utility model is achieved through the following technical solutions.

The utility model is made of sensing element, microprocessor and keyboard display.

Feature of the present utility model is:

A, described sensing element comprise and are inlaid in the arbitrary locational cylindrical rare earth permanent-magnet steel of domestic gas meter carrier gear circumference and all are positioned at poly-magnetic soft iron core on the same plane of carrier gear at level and vertical direction, place ear integrated switch suddenly between rare earth permanent-magnet steel and poly-magnetic soft iron core;

B, each household ear integrated switch output signal suddenly input to little processing host by the corresponding simulating switch respectively;

C, described keyboard display are portable individual components, are connected with main frame by standard plug-in unit.

Feature of the present utility model is that also described poly-magnetic soft iron core and ear integrated switch suddenly are packed in the non-metal shell, and is placed in the outside relevant position of the nonmetal case of domestic gas meter counter.

Feature of the present utility model is yet that the ear integrated switch adopts the transmission of two-wire system signal suddenly.

The utlity model has following advantage:

1, the utility model can be finished coal gas multi-user centralized measure, is particularly useful for the intensive skyscraper of resident family, has greatly alleviated statistician's labour intensity, increases work efficiency, and provides necessary condition for realizing the gas measurement modern management.

2, owing to adopt contactless hall switch, sensing element is installed in former domestic gas meter case outside, and safe and reliable, convenient for maintaining has guaranteed the complete of former domestic gas meter seal casing, and the operate as normal of former domestic gas meter is not produced any harmful effect.Simultaneously, bidirectional measuring (former domestic gas meter and the utility model use simultaneously) has guaranteed the reliability of gage work.

3, because hall switch is the two-wire system connection, revolution signal constant flow transmission, antijamming capability is strong, has long-distance transmissions performance preferably.In addition, the minimizing of number of leads is convenient to install, and therefore cost also decreases.

4, utilize soft iron core to gather magnetic, make sensing element sensitivity improve.

5, owing to adopt the portable keyboard display, a keyboard display can be joined multiple host and be used, and reduces system cost significantly, helps management simultaneously.

Fig. 1 the utility model sensing element structural representation

Fig. 2 the utility model is ear integrated switching circuit schematic diagram suddenly

Fig. 3 the utility model microprocessor system theory diagram

Number in the figure: 1, domestic gas meter case, 2, carrier gear, 3, permanent-magnet steel, 4, the sensing element housing, 5, ear integrated switch suddenly, 6, lead, 7, soft iron core, A, Single Chip Microcomputer (SCM) system, B, multi-channel data acquisition, C, sensor groups, D, keyboard display.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

Referring to Fig. 1, on a certain position of carrier gear (2) circumference, offer a groove, the cylindrical rare earth permanent-magnet steel of setting-in (3) in it.Ear integrated switch (5) is packed in the sensing element housing (4) with poly-magnetic soft iron core (7) suddenly, and by epoxy sealing, lead (6) is from wherein drawing.Sensing element housing and former domestic gas meter counter outer cover all adopt nonmetallic materials.Sensing element after the encapsulation is installed in domestic gas meter counter cover body outside, status requirement is to make carrier gear (2) and soft iron core (7) all be positioned at same plane in level and vertical direction, and ear integrated switch (5) is positioned between carrier gear (2) and the soft iron core (7) suddenly.

Referring to Fig. 2, ear integrated switch (5) adopts the transmission of two-wire system signal suddenly, its 1. pin connect+the 9VDC power supply, the 2. pin ground connection, the 3. pin by current-limiting resistance R ₁Be connected to the 1. pin, and by 1., 2. pin draw as the signal output part line.It's a week is past carrier gear (2) revolution, suddenly ear integrated switch (5) output one corresponding pulsating current signal.

Referring to Fig. 3, Single Chip Microcomputer (SCM) system (A) is made of 8031CPU, EPROM, RAM and corresponding peripheral expansion circuit.Multi-channel data acquisition circuit (B) selects an analog switch, pull-up resistor, comparer to constitute by multi-disc eight, and the sensor groups (C) that the each household sensing element constitutes is passed through corresponding analog switch to microprocessor system.Adopt portable keyboard display (D), be connected with main frame by standard plug-in unit, arbitrarily dismounting, whether dismounting does not influence main frame is normally measured.Portable keyboard display (D) is made of serial keyboard circuit and static display circuit.By also---string shift register, pull-up resistor and micro press-key constitute keyboard circuit; By string---and shift register, eight sections charactrons constitute static display circuit.

Claims (2)

1, a kind of coal gas multi-user centralized measure device is made of sensing element, little processing host and keyboard display, it is characterized in that:

A, described sensing element comprise and are inlaid in domestic gas meter carrier gear (2) the arbitrary locational cylindrical rare earth permanent-magnet steel of circumference (3) and all are positioned at poly-magnetic soft iron core (2) on the same plane of carrier gear (2) at level and vertical direction, place ear integrated switch (5) suddenly between described rare earth permanent-magnet steel (3) and poly-magnetic soft iron core (7);

B, each household ear integrated switch (5) output signal suddenly input to little processing host by the corresponding simulating switch respectively;

C, described keyboard display are portable individual components, are connected with main frame by standard plug-in unit;

D, described poly-magnetic soft iron core (7) are packed in the non-metal shell (4) with ear integrated switch (5) suddenly, and are placed in the outside relevant position of the nonmetal case of domestic gas meter counter (1).

2, measuring apparatus according to claim 1 is characterized in that the described integrated switch of ear suddenly (5) adopts the transmission of two-wire system signal, its 3. the foot line by current-limiting resistance R ₁Be connected to the 1. pin, by 1., 2. pin draw as the signal output part line.

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