As we all know, China's calorimeter market has incomparably great potential, and the country's recent policies are also promoting the specificization and industrialization of the calorimeter market. If you want to dig the first pot of gold in the calorimeter market, high-quality products are undoubtedly the top priority! At the beginning of the article, please allow the author to sincerely remind all those who have plans or are already producing magnetic calorimeters (Hall sensors) Even the reed switch design), this type of design has the most fatal flaws:
1) The hot water has many impurities, especially metal impurities. These impurities will be adsorbed on the magnetic head, resulting in inaccurate data collection. Generally, for about half a year, the entire watch is in a state of paralysis.
2) There is also the poor anti-interference ability of this design!
3) There is also the problem of power consumption.
For the above lessons, the author has personal experience. The non-magnetization of the heat meter is a necessary condition, and only the realization of the non-magnetization design can be a real heat meter.
Without the magnetization of the heat meter, TI's TMS3723B is undoubtedly the most mature technology in the world. This chip has a history of 5 years of successful use in Germany. In the process of participating and successfully developing the TMS3723B non-magnetic flow detection technology, the author summarized three difficulties for your reference. If there are any deficiencies, please advise!
1) Machine watch
The watch has a decisive position in the design of the whole heat meter, which has been ignored by our research and development team before! In addition to the high technical requirements of the watch itself, the key is:
The machine is equipped with a special impeller. The impeller Blade is coated with a damping material applied by a steam spray process. The formula of this material can be said to be an industrial secret. Our research and development progress was once blocked by this, and we finally found it abroad. It can only be solved after buying a lot of money!
The design of the sealing cover should consider the combination with the circuit board, especially the distance between the three sensors, which should be considered in the initial design. After nearly a year and a half of hard work by the entire team, the watch was finally developed successfully! This watch body is specially developed for electronic water meters and heat meters that use TMS3723B non-magnetic flow detection technology. The entire process is done according to German standards. The sealing, accuracy, stability and anti-magnetic properties of the watch body are first-class, and it is also the first dedicated heat meter body in China. At present, this watch body has passed the national test and is widely used.
2) TMS3723B flow detection technology
We also spent a lot of time to control the flow detection technology. The focus of the entire R & D team was on this from the beginning. To sum up, it is necessary to combine a strong microcontroller development capability with the overall concept of the heat meter. Backwater temperature, liquid crystal display, data collection, etc., the difficulty is difficult to express in words! Without a strong team, this work cannot be done. It took 1 year to write the software. The testing and modification took about half a year.
3) Early investment and production process
The initial investment is relatively large. It takes more than 1 million to import a set of testing equipment for heat meters, and about 500,000 for domestic production. This set of testing equipment is indispensable for the production of heat meters. Tools! I think that this investment is not a small amount for any enterprise. The production process is very demanding, especially because the parameters of each heat meter machine are different. It is necessary to write these real-time measured parameters into the program during production (thus it can be said that the software program of each heat meter is different. ), And then make corrections through the computer, so as to ensure the accuracy and stability of each heat meter.
In summary, the design and production of heat meters are very complex and high-tech. For companies that currently only have a small number of orders and plans to make technical reserves while looking for markets, the entire human and material investment is huge . So how to solve these difficulties?
Although technology transfer is a method, I do not think it is the best policy at present. Although OEM is an expedient measure, it is undoubtedly the most suitable solution at present.
The following is the introduction of this heat meter:
The new heat meter adopts an integral structure and is mainly composed of a totalizer, a flow sensor and a paired temperature sensor. It can display cumulative flow, accumulated heat, inlet water temperature, return water temperature, inlet and outlet water temperature difference and integrated temperature difference. The installation is simple, no debugging is required, and the price is low. It is widely used in central heating household metering projects, and has achieved good results in many engineering applications.
Main features of the product:
Micro power consumption design: The flow and temperature are designed with micro power consumption, and a 3-volt lithium battery can be used for more than 6 years.
Unique flow movement design: to achieve accurate flow measurement.
Inlet and outlet flow channel design: through precise flow channel design, reduce water flow loss and save energy.
Power-down protection design: using low-power, low-power EEPROM, to achieve data storage and memory in case of accidental failure.
Display design: realize the recording and display function of date.
Beautiful shell design: design the appearance of the heat meter according to aesthetic principles and ergonomic requirements.
Remote meter reading design: reserved remote meter reading interface.
Main technical indicators: Smart household heat meter implementation standard CJ128-2000; working voltage: 3V; normal battery life: ≥ 6 years; sensor cable length: 1.5 ~ 15m; temperature detection range: 0 ~ 95 ℃; data output interface: (Optional) M-BUS, RS485; temperature detector: PT1000; conditions of use: relative humidity ≤85%, ambient temperature: + 5 ℃ ～ + 55 ℃. -Register Hong Kong Company | Shanghai Car Rental | Hong Kong Company Registration | Car Rental
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