【School】 talk about remote meter weak current technical status and development trend of China --- Power By weak home 【Network】..

<br> [Abstract]: Remote meter reading system that is in focus, but also difficult to analyze its current situation, predict its future development of the industry for the promotion of meter reading is important.. <BR> [Key words .]: remote water meter, meter reading <BR> <BR> 2001, the author has published an article "China's emergence and development of remote meter" (after the magazine article to be six., eight sites reproduced).. .In this paper, twelve years after the author has in the national patent office to register the background of six patented inventions, discussed China's emergence and development of remote meter course.. On the remote meter which was passed from the built-in external sensor, .photoelectric sensor from the switch to self-sensing methods to maintain a description and analysis are done.. When three years, analysis of past research that we have a role?. The original authors believe that the most advanced remote from the meter to keep switching .it still advanced?. On the future of the remote meter is accurate forecast made?. This will make elaborate.. <BR> <BR> One. Pulse current situation and development of remote meter <BR> First of all, .including two pulse sensing method has been largely eliminated from the meter reading area, and they are the optical sensing methods and Huo. Seoul sensing methods.. <BR> Tends to eliminate the reason is because: 1. With the reed, and other .contact sensing methods, with high power consumption of the shortcomings of their own, which makes some of the needs of micro-power operation of the occasion can not be used.. 2. Fibrillation threshold in error can not overcome the shortcomings of the signal. ..3. External power supply is for the inconvenience and trouble.. <BR> Course, the Hall sensor way through a decade of updated sound, if not better than the way it appears, it may also be retained.. However, compared .with the self-holding switch, Hall sensing methods in reliability, accuracy, micro-power, low cost, etc. are not dominant, which makes the Hall sensor means losing the last space.. <BR> Contrast, the optical sensing methods ., not to mention clumsy and defects, and past year and more still in use almost hear the sound.. <BR> Single reed switch sensor means the already "notorious", the disadvantages can not solve the contact bounce less insensitive multi- .counting and counting sensor problem.. Applied to the scene a few years ago nearly all of these products are abandoned or replace them.. However, some people do not know the business and the pursuit of accuracy is not the case, there are still people .in use.. <BR> Compared with the double-reed pipe alone reed switch with a significant improvement, the author of "China's emergence and development of remote water meter," an article that made their own invention (patent number of .a high precision meter.: 99206865.7) structural principle is described in detail.. In actual use, the double reed sensor there are still some problems.. 1. The reed sensor sensitivity limitations, there will be discarded weak magnetic data, magnetic induction intensity .of the same problems.. 2. Collector detected on two switches, which need to add an interface like any other remote tables as if on the short circuit, open circuit, also were detected, then it will be more complicated.. 3. For .the external magnetic field, which is neither easy to external magnetic shield, not a self-function.. <BR> "China's emergence and development of remote water meter," a text, with the larger space of the self-holding .switch demonstrated the superiority of remote water meters.. The first time in three years, although the remote method is technically still retains its original features, but in the production process has done a lot of improvement and amendment.. Type of product specifications to the .hundreds of species of mold manufacturing reached a hundred of the actual use has spread from the original thirty thousand to five hundred thousand or more, and to promote faster expansion.. Far from the meter to keep switching from one technology project is completely transition to a .mature product, but also rose to a certain well-known brands of merchandise.. Its accurate, reliable, low cost, easy to use as the leading edge of the meter reading market.. This process is thought of the idea three years ago exactly ... <BR> To keep switching from the remote meter remote water meter will be the mainstream product.. <BR> <BR> II. Direct-reading current situation and development of remote meter reading remote meter straight <BR> .; divided into four types: photoelectric, contact type, camera type, count type.. They have two common advantages: 1. Table with the data is read out on the data displayed on the dial, not the pulse.. 2. Usually do .not need electricity, just read the moment in power, therefore, not afraid of power outages.. In theory, it is always read data and dial data synchronization.. Therefore, direct-reading before the year 2000 the concept of remote meter generation, .by 2002 the scene after the application of the actual product, has been tracking people's pets and attention.. By 2003, the national standards setting process is also specifically incorporated into the direct-reading the concept of remote table; the direct reading remote table appears ., "Remote pulse vitality of the table whether there are" big on more. its attention to a climax.. <BR> Remote meter direct-reading photoelectric type as the first, its structure by: a water wheel in each week to .set up five reflector surface, the location of the corresponding set five Optocoupler. device.. Coupler is reflected by total number of rounds to determine the location.. Want to read a few words to the installation of wheel sensors.. For example: Read .5 digits on the installation of 5 × 5 = 25 of the sensing device.. This direct-reading water meters in the table because all devices are within the wheel around the core, therefore, generally use the dry water meter.. <BR> .; Remote meter reading directly contact the structure by: dial in the meter pointer, a pointer to each of the following axis potentiometer fitted with a synchronous, measured by the contact resistance of the potentiometer to determine the pointer. position.. This direct-reading .water meter water meter can be used wet.. <BR> Camera remote meter direct-reading method is relatively simple structure, the mechanical wheel display window to install a camera to shoot digital images can be heard.. <BR> Remote direct .-reading meter count is collected each pulse of the chip installed in the water, through the battery to maintain its work, the records and the accumulated data is stored in the chip, the data read from the chip is synchronous data dial ... < .; BR> In addition, there are direct-reading remote meter reading and other types of bar code directly, not discussed here.. <BR> Although the direct remote meter reading has outstanding advantages, but they popularized the practical effect is not satisfactory ... Comprehensive analysis of the problems, about the following: optical, two ways to contact terms of structure too complicated.. 1. The value of existing civilian water conditions, to create such a high precision products, the cost to an acceptable level and .the market itself is a contradiction.. 2. They have changed the standard meter of the original structure, the accumulation of human beings for decades to create a "standard, reliable, sophisticated, mature," the perfect product to be destroyed. .. Can the short term to establish a new, mature structure and standards, is questionable.. 3. So complex products in large quantities and can stand the test of long life, yet to be discussed, has been exposed many problems.. < .BR> Camera direct-reading water meter water meter does not change the original mechanical standards, the structure is relatively simple, but the image processing is too complex, the image of the fuzzy numbers into digital is also difficult.. Many of the current bus .system, sub-wire meter reading systems are not common.. <BR> Produced in more than an idea in three ways, namely: additive instead of a mechanical electronic accumulate.. Why?. Why should we care easy to ask difficult, .the development of electronic technology to this day, do not even have a "cumulative" are not complete it?. <BR> Following direct-reading counter arguments about remote meter.. Remote meter existing switching module plus a micro chip and button .batteries.. Accumulation can be made to store data, but also remote meter communication to send information.. Its output is only two lines, as long as a connection to the bus to complete the full installation, meter reading at any time transfer station will .be able to read meter data.. Its function and role of direct-reading table with the first three are the same, each meter can work independently from the bus, even if the external stop electricity, water down the line, water moved a bit ., do not affect the meter count.. With the success of its current three mature technology.. 1. Self-holding switch is admissible.. 2. Lithium accumulation of memory chips support.. 3. Standard communication protocol of the bus transfer. .. Because these technologies are experiencing a few years, decades of proven technology, and in the production process, raw material supply and service system, and so fit with the conventional products.. Therefore, its success "winner.". < .BR> Remote direct-reading meter count will be the direct remote meter-reading the mainstream products.. <BR> <BR> Third, there is no mature products business success no <BR> remote meter reading is a very difficult .high-tech systems engineering, not business property, and certainly not "pass reselling.". On the rare technology breakthroughs against those who have been advertising a big fuss on the "speculation.". Industry in the meter reading, .eating too much this loss of business, a typical IC card water meter is the promotion process.. IC card water meter unit of ten years ago with research and development, R & D unit in 2000 has reached hundreds, advertising Chaozuo also follow.. .2002 is a strange phenomenon occurred: those strong, skilled, experienced voice of the old R & D units smaller and smaller.. Those who are just joining the business, no experience of the "greenhorn" (not tasted that bad) are still .in there yelling, it seems the market today won.. <BR> This, the authors propose the following for reference: <BR> 1. Do not blindly pursue passive remote water meter, remote meter active denial.. Active remote meter .the problems has been the new micro-power technology and battery technology solution, has entered the mature period.. It's simple, cheap, universal and so the market has formed a mainstream, not be replaced.. <BR> 2. Do not .blindly pursue the bus system for meter reading, deny the sub-wire meter.. Sub-wire meter reading (ie, remote meter pulse meter reading directly) itself is not abuse.. Some aspects of the past perfect because the product caused a bad .influence.. Past two years, these problems have gradually been resolved.. Its versatility and low cost advantage will make it a long time dominated the market.. <BR> 3. Do not blindly pursue the kind of built-in sensor- .type water meter look pretty remote.. Five years ago, many are built-in remote water meter sensor, the design of the author is no exception, but pretty difficult to use.. By the external sensor built into it is being applied forced out .of practice, some ways an improvement, the appearance of a beautiful business here can not be bothered.. <BR> 4. Wireless remote water meter pilot should start gradually.. <BR> Proved that the products in the remote meter, .regardless of technology, product, or process, and can achieve any substantial progress a little bit is very easy.. Who wants to solve all problems in one step, one who will put myself into situations, and even premature eliminated.. This requires many .technical staff of concentrated solid, rather than the operation of business early on ...