Intelligent water meter powered by dry battery

Abstract

The utility model belongs to the technical field of water meters, and relates to an intelligent water meter powered by a dry battery, which comprises a water meter base meter, a meter head and the dry battery, a dry battery power supply circuit board is arranged in the meter head, a valve power supply interface, an NB module power supply interface and an MCU power supply interface are arranged on the dry battery power supply circuit board, a dry battery power supply circuit is arranged on the dry battery power supply circuit board, and a farad capacitor and a super capacitor are arranged in the dry battery power supply circuit, so that a working circuit of the water meter is stable in discharging and high in power supply efficiency. And the problems of unstable efficacy, easy passivation, easy influence by factors such as external environment temperature and humidity and the like during power supply of a lithium battery are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of water meters and relates to an intelligent water meter powered by a dry cell. Background Art

[0002] The battery is the heart of the smart water meter and the foundation of its life cycle. Smart water meters are divided into two types according to the power supply mode: external battery type and internal battery type. Internal battery type water meters are powered by internal lithium batteries and are early products. There have always been difficult-to-solve technical problems that affect quality in the market.

[0003] Smart water meters use built-in lithium batteries, which have the advantages of large battery capacity and long life. However, in actual applications, there are four major hidden dangers in the built-in lithium battery power supply:

[0004] 1. During the production, transportation and use, battery quality problems of varying degrees may occur from time to time. Branded lithium batteries have a defect rate of 1‰-3‰, and the defect rate of non-branded manufacturers is even higher. Theoretically, the service life of lithium batteries can reach more than six years as required by water meters, but generally they will be short of power after two or three years of use, and some of the poor quality ones may even run out of power after one or half a year.

[0005] 2. The harsh conditions of the water meter installation and use environment have a great impact on lithium batteries. The high temperature and high humidity environment increases the current of electronic components, and the battery is directly affected by moisture and affects its life.

[0006] 3. It is difficult to replace batteries on site after power outage, which increases the maintenance cost for manufacturers and brings inconvenience to users, especially unnecessary trouble to property management. When replacing batteries, old batteries explode and cause injuries from time to time, which poses a great risk to personal safety. In addition, it is difficult for many small factories to provide timely after-sales service after five or six years.

[0007] 4. The built-in lithium battery has the hidden danger of spontaneous combustion and explosion in high temperature and high humidity environment. In extremely low temperature environment, the battery is prone to passivation, the water meter will appear electronic black screen and freeze, and the basic functions of the smart water meter will be lost. Examples of this have been reported in China.

[0008] Based on the above reasons, a smart water meter that can be powered by dry batteries is needed to solve the above technical problems. The development trend of the power supply mode of smart water meters should consider two major factors: one is that the power supply should be safe, efficient and high-quality batteries, and the second is that the battery compartment should be convenient for replacing batteries and solve the problem of moisture and waterproof. Although the marked capacity of dry batteries is small, the discharge is safe, stable and efficient, which completely avoids all the defects of lithium batteries, and the use effect and cost performance far exceed lithium batteries. With the development of smart water meters, battery-external smart water meters with moisture and waterproof functions will surely become mainstream products. From the development trend of smart water meters, battery-external smart water meters are powered by ordinary dry batteries, which is in line with the development trend of smart water meters and more suitable for my country's national conditions. Utility Model Content

[0009] The technical solution adopted by the utility model to solve the technical problem is: a dry battery-powered smart water meter, comprising: a water meter base, a meter head, and a dry battery, wherein the dry battery is used to power the meter head; a dry battery-powered circuit board is provided in the meter head, a valve power supply interface, an NB module power supply interface, and an MCU power supply interface are provided on the dry battery-powered circuit board, and a dry battery power supply circuit is provided on the dry battery-powered circuit board;

[0010] The dry battery power supply circuit includes: diodes D1-D4, D9: capacitors C61, C62, voltage stabilizers U1, U2, U10, capacitors C2, C6-C9, C30, C34, C38, C56, C63; the electrical connection method of the dry battery power supply circuit is: the positive electrode of the dry battery is grounded, the negative electrode of the dry battery is connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the valve power supply interface;

[0011] The anode of the diode D4 is connected to the anode of the diode D2, the cathode of the diode D4 is connected to the input end of the voltage regulator U10, the output end of the voltage regulator U10 is connected to the anode of the diode D1, one end of the capacitor C61 is grounded and the other end is connected to the input end of the voltage regulator U10, one end of the capacitor C62 is grounded and the other end is connected to the output end of the voltage regulator U10; the cathode of the diode D1 is respectively connected to the anode of the diode D3 and the anode of the diode D9, one end of the capacitor C63 is grounded and the other end is connected to the cathode of the diode D1;

[0012] The cathode of the diode D3 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the MCU power supply interface, one end of the capacitor C2 is grounded and the other end is connected to the cathode of the diode D3, and one end of the capacitor C8 and the other end of the capacitor C9 are grounded and connected to the MCU power supply interface;

[0013] The cathode of diode D9 is connected to the input of voltage regulator U2, the output of voltage regulator U2 is connected to the power supply interface of NB module, one end of capacitor C56 is grounded and the other end is connected to the cathode of diode D9, capacitor C34, capacitor C30, capacitor C7, capacitor C6, capacitor C37 and capacitor C38 are all grounded at one end and the other end is connected to the power supply interface of NB module; the current dry battery circuit generally uses resistors for voltage reduction and current stabilization, which has large power consumption and poor voltage reduction and current stabilization effect; the new dry battery power supply circuit of this design uses high-quality brand dry batteries, high-quality brand farad capacitors and high-quality brand supercapacitors as the main power supply of the power supply circuit; the design circuit adopts multiple linear voltage and current stabilizers (IDO), small resistors, diodes and other electronic components to make the charging and discharging of farad capacitors, MCU power supply and NB communication power supply more accurate, safe and stable, with scientific design concept and reasonable circuit layout, which can more effectively play the role of circuit safety and stability.

[0014] Preferably, the dry battery power supply circuit also includes a supercapacitor BAT2 and a diode D6, one end of the supercapacitor BAT2 is grounded and the other end is connected to the positive electrode of the diode D6, and the negative electrode of the diode D6 is connected to the MCU power supply interface; the dry battery power supply circuit is provided with a supercapacitor circuit to protect the MCU and the clock chip from operating normally and making various alarm judgments when the main power is underpowered or powered off. The existing circuit is not provided with a supercapacitor circuit, and the main circuit cannot make various alarm indications.

[0015] More preferably, the supercapacitor BAT2 is a 3.8V capacitor.

[0016] Preferably, the capacitors C61 and C62 are both 1μF / 25V capacitors.

[0017] Preferably, the models of the voltage regulators U1, U2, and U10 are CE6232A33P, CE5036T5NB, and CE6232A50P, respectively.

[0018] Preferably, the dry battery is an external battery compartment device with moisture-proof and waterproof functions, and the dry battery is 4 1.5V alkaline batteries.

[0019] The beneficial effects of the utility model are:

[0020] 1. The working circuit of the water meter of the utility model has stable discharge and high power supply efficiency, which avoids the problems of unstable function, easy passivation and being easily affected by external environmental temperature, humidity and other factors when powered by lithium batteries.

[0021] 2. The dry battery power supply of the water meter of the utility model adopts an external battery compartment device, which is convenient for installation and replacement, which is beneficial for users and property to replace batteries and reduce after-sales service costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a dry cell powered smart water meter;

[0023] Figure 2 It is a schematic diagram of the power supply circuit.

[0024] Among them, 1. Water meter base; 2. Meter head; 3. Dry battery. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the relevant technologies in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] refer to Figures 1-2 The utility model discloses a dry cell-powered intelligent water meter, comprising a water meter base 1, a meter head 2, and a dry cell 3, wherein the dry cell 3 is used to power the meter head 2; a dry cell-powered circuit board is arranged in the meter head 2, a valve power supply interface, an NB module power supply interface, and an MCU power supply interface are arranged on the dry cell-powered circuit board, and a dry cell power supply circuit is arranged on the dry cell-powered circuit board; the dry cell 3 uses four dry cells as the main power supply to respectively power the valve power supply circuit, the MCU power supply circuit, and the NBIOT module power supply circuit;

[0027] The dry battery power supply circuit includes: diodes D1~D4, D9: capacitors C61, C62, voltage regulators U1, U2, U10, capacitors C2, C6~C9, C30, C34, C38, C56, C63; the electrical connection method of the dry battery power supply circuit is: the positive electrode of the dry battery 3 is grounded, the negative electrode of the dry battery 3 is connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the valve power supply interface; the voltage regulators U1, U2, U10 respectively use 3V linear voltage regulators, 6V leading voltage regulators, and 5V linear voltage regulators; capacitors C61 and C62 are both high-quality brand Farad capacitors;

[0028] The anode of the diode D4 is connected to the anode of the diode D2, the cathode of the diode D4 is connected to the input end of the voltage regulator U10, the output end of the voltage regulator U10 is connected to the anode of the diode D1, one end of the capacitor C61 is grounded and the other end is connected to the input end of the voltage regulator U10, one end of the capacitor C62 is grounded and the other end is connected to the output end of the voltage regulator U10; the cathode of the diode D1 is respectively connected to the anode of the diode D3 and the anode of the diode D9, one end of the capacitor C63 is grounded and the other end is connected to the cathode of the diode D1;

[0029] The cathode of the diode D3 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the MCU power supply interface, one end of the capacitor C2 is grounded and the other end is connected to the cathode of the diode D3, and one end of the capacitor C8 and the other end of the capacitor C9 are grounded and connected to the MCU power supply interface;

[0030] The cathode of diode D9 is connected to the input of voltage regulator U2, the output of voltage regulator U2 is connected to the power supply interface of NB module, one end of capacitor C56 is grounded and the other end is connected to the cathode of diode D9, capacitor C34, capacitor C30, capacitor C7, capacitor C6, capacitor C37 and capacitor C38 are all grounded at one end and the other end is connected to the power supply interface of NB module; the current dry battery circuit generally uses resistors for voltage reduction and current stabilization, which has large power consumption and poor voltage reduction and current stabilization effect; the dry battery power supply circuit uses high-quality brand dry batteries, high-quality brand farad capacitors and high-quality brand supercapacitors as the main power supply of the power supply circuit; the design circuit adopts multiple linear voltage and current stabilizers (IDO), small resistors, diodes and other electronic components to make the charging and discharging of farad capacitors, MCU power supply and NB communication power supply more accurate, safe and stable, with scientific design concept and reasonable circuit layout, which can more effectively play the role of circuit safety and stability.

[0031] Furthermore, the dry battery power supply circuit also includes a supercapacitor BAT2 and a diode D6. One end of the supercapacitor BAT2 is grounded and the other end is connected to the positive electrode of the diode D6. The negative electrode of the diode D6 is connected to the MCU power supply interface. The dry battery power supply circuit is provided with a supercapacitor circuit to protect the MCU and the clock chip from operating normally and making various alarm judgments when the main power is underpowered or powered off. The existing circuit does not add a supercapacitor circuit, and the main circuit cannot make various alarm indications.

[0032] Furthermore, the supercapacitor BAT2 is a 3.8V capacitor; the supercapacitor BAT2 is also a high-quality brand supercapacitor.

[0033] Furthermore, the capacitors C61 and C62 are both 1μF / 25V capacitors.

[0034] Furthermore, the models of the voltage regulators U1, U2, and U10 are CE6232A33P, CE5036T5NB, and CE6232A50P, respectively.

[0035] Furthermore, the dry battery 3 is an external battery compartment device with moisture-proof and waterproof functions, and the dry battery is 4 1.5V alkaline batteries.

[0036] To sum up, the working circuit of the water meter of the utility model has stable discharge and high power supply efficiency, which avoids the problems of unstable function, easy passivation and susceptibility to the influence of external environmental temperature, humidity and other factors when powered by lithium batteries. Therefore, the utility model has broad application prospects.

[0037] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dry cell powered smart water meter, characterized in that: include: A water meter base (1), a meter head (2), and a dry battery (3), wherein the dry battery (3) is used to supply power to the meter head (2); The meter head (2) is provided with a dry cell power supply circuit board, the dry cell power supply circuit board is provided with a valve power supply interface, an NB module power supply interface, and an MCU power supply interface, and the dry cell power supply circuit board is provided with a dry cell power supply circuit; The dry battery power supply circuit comprises: diodes D1-D4, D9, capacitors C61, C62, voltage stabilizers U1, U2, U10, capacitors C2, C6-C9, C30, C34, C38, C56, C63; the electrical connection mode of the dry battery power supply circuit is: the positive electrode of the dry battery (3) is grounded, the negative electrode of the dry battery (3) is connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the valve power supply interface; The anode of the diode D4 is connected to the anode of the diode D2, the cathode of the diode D4 is connected to the input end of the voltage regulator U10, the output end of the voltage regulator U10 is connected to the anode of the diode D1, one end of the capacitor C61 is grounded and the other end is connected to the input end of the voltage regulator U10, one end of the capacitor C62 is grounded and the other end is connected to the output end of the voltage regulator U10; the cathode of the diode D1 is respectively connected to the anode of the diode D3 and the anode of the diode D9, one end of the capacitor C63 is grounded and the other end is connected to the cathode of the diode D1; The cathode of the diode D3 is connected to the input end of the voltage regulator U1, the output end of the voltage regulator U1 is connected to the MCU power supply interface, one end of the capacitor C2 is grounded and the other end is connected to the cathode of the diode D3, and one end of the capacitor C8 and the other end of the capacitor C9 are grounded and connected to the MCU power supply interface; The cathode of diode D9 is connected to the input end of voltage regulator U2, the output end of voltage regulator U2 is connected to the NB module power supply interface, one end of capacitor C56 is grounded and the other end is connected to the cathode of diode D9, capacitor C34, capacitor C30, capacitor C7, capacitor C6, capacitor C37, and capacitor C38 are all grounded at one end and the other end is connected to the NB module power supply interface.

2. A dry cell powered smart water meter according to claim 1, characterized in that: The dry cell power supply circuit further includes a super capacitor BAT2 and a diode D6. One end of the super capacitor BAT2 is grounded and the other end is connected to the positive electrode of the diode D6. The negative electrode of the diode D6 is connected to the MCU power supply interface.

3. A dry cell powered smart water meter according to claim 2, characterized in that: The super capacitor BAT2 is a 3.8V capacitor.

4. A dry cell powered smart water meter according to claim 1, characterized in that: The capacitors C61 and C62 are both 1 μF / 25V capacitors.

5. A dry cell powered smart water meter according to claim 1, characterized in that: The models of the voltage regulators U1, U2, and U10 are CE6232A33P, CE5036T5NB, and CE6232A50P, respectively.

6. A dry cell powered smart water meter according to claim 1, characterized in that: The dry battery (3) is an external battery compartment device with moisture-proof and waterproof functions, and the dry battery is 4 1.5V alkaline batteries.

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