CN107677330B - Water flow detection method, controller and water flow sensor - Google Patents
Water flow detection method, controller and water flow sensor Download PDFInfo
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- CN107677330B CN107677330B CN201710484283.5A CN201710484283A CN107677330B CN 107677330 B CN107677330 B CN 107677330B CN 201710484283 A CN201710484283 A CN 201710484283A CN 107677330 B CN107677330 B CN 107677330B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
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Abstract
The invention provides a water flow detection method, which comprises the following steps: when water flow detection is needed, detecting whether N Hall elements arranged on a water flow sensor are in a normal state; when one and only one Hall element is in a normal state, the Hall element in the normal state is selected to participate in the current water flow detection work; when at least two Hall elements are in a normal state, comparing the length of accumulated working time of the at least two Hall elements; selecting the Hall element with the shortest accumulated working time to participate in the current water flow detection work; and acquiring water flow signals of the Hall elements participating in the water flow detection work at this time and calculating to obtain water flow data. The invention can effectively prolong the service life of the Hall element, thereby prolonging the service life of the water flow sensor. Meanwhile, the invention also provides a controller for executing the water flow detection method and a water flow sensor comprising the controller.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a water flow detection method, a controller and a water flow sensor.
Background
In the water flow sensor in the prior art, after water flows through the water flow turning cylinder, the magnetic rotor is impacted to rotate, the Hall element forms an electric potential field in a power-on state, and the rotating magnetic rotor generates high and low pulse levels in the electric field and outputs the high and low pulse levels to the controller. The water flow is calculated by the controller, the functions of the machine such as on-off, constant temperature and the like are controlled, and the Hall element is similar to an aircraft engine, so that the product can not work directly if a fault occurs. The hall element is electronic components, and is all more sensitive to temperature and humidity, and hall element often appears the failure trouble in the reality product, leads to the unable response discharge of machine and out of work, seriously influences the water heater and uses the reliability, for overcoming these defects of discharge sensor, is necessary to study discharge sensor.
disclosure of Invention
A first technical problem to be solved by the embodiments of the present invention is to provide a water flow rate detection method, which can improve reliability of water flow rate detection and prolong a service life of a water flow rate sensor.
A second technical problem to be solved by the embodiments of the present invention is to provide a controller, which is used for executing the above-mentioned water flow detecting method, and can also improve the reliability of water flow detection and prolong the service life of the water flow sensor.
A third technical problem to be solved by the embodiments of the present invention is to provide a water flow sensor, which includes the above-mentioned controller, and can also improve the reliability of water flow detection and have a long service life.
In order to solve the first technical problem, the embodiment of the present invention is solved by the following technical solutions:
When water flow detection is needed, detecting whether N Hall elements arranged on a water flow sensor are in a normal state; n is an integer greater than or equal to 2;
When one and only one Hall element is in a normal state, the Hall element in the normal state is selected to participate in the current water flow detection work;
when at least two Hall elements are in a normal state, comparing the accumulated working time of the at least two Hall elements; the accumulated working time is the historical total duration of each Hall element participating in water flow detection work;
Selecting the Hall element with the shortest accumulated working time and in the normal state to participate in the current water flow detection work, and controlling other Hall elements in the normal state to be in the dormant state;
And acquiring a water flow signal of the Hall element participating in the water flow detection work at this time and calculating to obtain water flow data.
if at least two Hall elements are detected to be in a normal state, the controller can automatically compare the accumulated working time of the at least two Hall elements participating in the work, and the Hall element with the shortest accumulated working time can automatically participate in water flow induction and operation work, so that N Hall elements can be ensured to be alternately used, the condition that only one Hall element is used is avoided, the practical service life of the Hall elements can be effectively prolonged, and if only one Hall element is detected to be normal, the normal Hall element automatically participates in water flow induction and operation work.
Compared with the prior art, the embodiment of the invention adopts a plurality of Hall elements which can automatically switch to participate in the work, so that the practical service life of the Hall elements can be effectively prolonged, and the working life of the water flow sensor is further prolonged; the failure rate of the water heater starting waterless reaction can be effectively reduced, and the reliability of the water heater is greatly improved.
In an optional embodiment, the method further comprises: and when the N Hall elements arranged on the water flow sensor are in an abnormal state, stopping water flow detection and prompting the water flow sensor to fail. When all the Hall elements are in an abnormal state, the water flow sensor is indicated to have a fault, and the water flow cannot be normally detected, so that the fault of the water flow sensor is timely prompted, and the safety and the reliability of use are improved.
In an optional embodiment, the detecting whether N hall elements disposed on the water flow sensor are in a normal state when the water flow detection is required includes:
When water flow detection is needed, water flow detection signals are respectively sent to the N Hall elements to detect the water flow signals of the N Hall elements;
And respectively judging whether the N Hall elements are in a normal state or not according to the water flow signals of the N Hall elements.
In an optional implementation manner, the determining, according to the water flow signals of the N hall elements, whether the N hall elements are in a normal state respectively includes:
when the value of the water flow signal of any Hall element is within a preset threshold range, judging that the corresponding Hall element is in a normal state;
And when the value of the water flow signal of any Hall element exceeds the threshold range, judging that the corresponding Hall element is in an abnormal state.
For example, when the value of the water flow signal is too high or too low, the water flow signal can be considered as an abnormal state, and the validity of the water flow signal generated by the holer element is ensured.
in an optional embodiment, the method further comprises: and when the starting signal of the gas water heater is received, determining that water flow detection is needed.
In order to solve the second technical problem, the embodiment of the present invention is solved by the following technical solutions:
A controller comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the water flow detection method described above when executing the computer program.
In order to solve the third technical problem, the embodiment of the present invention is solved by the following technical solutions:
A water flow sensor comprising: the water flow turning device comprises a shell, a water flow turning cylinder, a magnetic rotor, a rotor support, N Hall elements and the controller; the shell is provided with a water inlet and a water outlet; the water flow turning cylinder is arranged in the shell, and a rotor impeller is arranged at a water inlet of the water flow turning cylinder corresponding to the shell; the rotor support is fixed in the shell; one end of the magnetic rotor is inserted on the rotor support seat, and the other end of the magnetic rotor is inserted on the rotor impeller; the N Hall elements are respectively arranged on the shell and correspond to the magnetic rotor; the N Hall elements are respectively and electrically connected with the controller; n is an integer greater than or equal to 2.
in an alternative embodiment, the water flow sensor further comprises a flow stabilizer; the flow stabilizing core is arranged at the water outlet of the shell. The flow stabilizing core can play a role in stabilizing the water flow, and the water flow cannot be changed in a large range due to the change of the water inlet pressure.
In an alternative embodiment, the housing is provided with more than two mounting grooves; the N Hall elements are correspondingly inserted into the more than two mounting grooves to be arranged on the shell.
In an alternative embodiment, the water flow sensor further comprises a first retaining ring and a second retaining ring; the first fixing ring is arranged at the water outlet of the shell to fix the flow stabilizing core; the second fixing ring is arranged at the position, corresponding to the water inlet of the shell, of the water flow turning cylinder so as to fix the water flow turning cylinder.
drawings
Fig. 1 is a flowchart of a water flow rate detection method according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a water flow sensor according to a third embodiment of the present invention;
FIG. 3 is an exploded view of FIG. 2;
Fig. 4 is a schematic structural diagram of the hall element 5 in fig. 3;
The reference numbers are as follows:
1. a housing; 2. a water flow direction changing cylinder; 3. a magnetic rotor; 4. a rotor support; 5. a Hall element; 6. a flow stabilizing core; 7. mounting grooves; 8. a first retaining ring; 9. a second retaining ring; 10. a seal ring; 21. a rotor impeller; 31. a magnetic rotor body; 32. a rotor bar; 51. a ground terminal; 52. a power supply terminal; 53. and a signal output terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, which is a flowchart illustrating a water flow detecting method according to a first embodiment of the present invention. The method comprises the following steps:
S1, when water flow detection is needed, detecting whether N Hall elements arranged on the water flow sensor are in a normal state; n is an integer greater than or equal to 2;
S2, when one and only one Hall element is in a normal state, selecting the Hall element in the normal state to participate in the current water flow detection work;
s3, when at least two Hall elements are in normal state, comparing the accumulated working time of the at least two Hall elements; the accumulated working time is the historical total duration of each Hall element participating in water flow detection work;
s4, selecting the Hall element with the shortest accumulated working time and in the normal state to participate in the current water flow detection work, and controlling other Hall elements in the normal state to be in the dormant state;
And S5, acquiring water flow signals of the Hall elements participating in the current water flow detection work and calculating to obtain water flow data.
In the embodiment of the present invention, N ═ 2, that is, the number of hall elements provided on the water flow rate sensor is two.
When any one of the hall elements is used as a hall element participating in the current water flow rate detection operation, after the current water flow rate detection operation is completed, the current operation time is updated to the accumulated operation time, so that the hall element is determined to be used next time.
the water flow sensor in the prior art is only provided with one Hall element, and the Hall element is easy to fail, so that the water flow sensor cannot sense the water flow and does not work. In the embodiment of the invention, by configuring the N Hall elements on the water flow sensor, wherein N is an integer greater than or equal to 2, and combining the water flow detection method, if at least two Hall elements are detected to be normal, the controller can automatically compare the accumulated working time of the at least two Hall elements participating in the work, and the Hall element with the shortest accumulated working time can automatically participate in water flow induction and operation work, so that the N Hall elements can be ensured to be alternately used, the condition that only one Hall element is used is avoided, and the practical service life of the Hall element can be effectively prolonged. If only one of the pre-detection Hall elements is normal, the normal Hall element automatically participates in water flow sensing and operation work.
It should be noted that the water flow rate detecting method provided in the first embodiment of the present invention can be applied to any water flow rate sensor having N hall elements, the present invention does not limit other structures of the water flow rate sensor, and a person skilled in the art can implement the water flow rate detecting method provided in the first embodiment of the present invention based on any water flow rate sensor having N hall elements.
according to the first embodiment of the invention, as the Hall elements are adopted and can automatically switch to participate in work, the practical service life of the Hall elements can be effectively prolonged, and the working life of the water flow sensor is further prolonged; the failure rate of the water heater starting waterless reaction can be effectively reduced, and the reliability of the water heater is greatly improved.
In an optional embodiment, the method further comprises: and when the starting signal of the gas water heater is received, determining that water flow detection is needed. Namely, the water flow sensor provided by the embodiment of the invention can be applied to a gas water heater, and when the gas water heater is started, N Hall elements on the water flow sensor are started to be detected whether to be in a normal state, and the Hall elements participating in the water flow detection work are selected.
In an optional embodiment, the method further comprises: and when the N Hall elements arranged on the water flow sensor are in abnormal states, stopping water flow detection and prompting the fault of the water flow sensor. When all the Hall elements are in an abnormal state, the water flow sensor is indicated to have faults, and the water flow cannot be normally detected, so that the faults of the water flow sensor are timely prompted, and the use safety and reliability are improved.
In an optional embodiment, the detecting whether N hall elements disposed on the water flow sensor are in a normal state when the water flow detection is required includes:
when water flow detection is needed, water flow detection signals are respectively sent to the N Hall elements to detect the water flow signals of the N Hall elements;
And respectively judging whether the N Hall elements are in a normal state or not according to the water flow signals of the N Hall elements.
In an optional implementation manner, the determining, according to the water flow signals of the N hall elements, whether the N hall elements are in a normal state respectively includes:
When the value of the water flow signal of any Hall element is within a preset threshold range, judging that the corresponding Hall element is in a normal state;
And when the value of the water flow signal of any Hall element exceeds the threshold range, judging that the corresponding Hall element is in an abnormal state.
For example, when the value of the water flow signal is too high or too low, the water flow signal can be considered as an abnormal state, and the validity of the water flow signal generated by the holer element is ensured.
accordingly, a second embodiment of the present invention provides a controller, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor implements the water flow rate detection method of the first embodiment when executing the computer program.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a micro processor or the processor may be any conventional processor or the like, which is the control center of the apparatus/terminal device, and connects the various parts of the entire apparatus/terminal device using various interfaces and lines.
The memory may be used for storing the computer programs and/or modules, and the processor may implement various functions of the apparatus/terminal device by executing or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Accordingly, a third embodiment of the present invention provides a water flow sensor. Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a water flow sensor according to a third embodiment of the present invention, and fig. 3 is an exploded view of fig. 2.
The water flow sensor comprises a shell 1, a water flow turning cylinder 2, a magnetic rotor 3, a rotor support 4, N Hall elements 5 and a controller (not shown) in the second embodiment; the shell 1 is provided with a water inlet and a water outlet; the water flow turning cylinder 2 is arranged in the shell 1, and a rotor impeller 21 is arranged at a water inlet of the water flow turning cylinder 2 corresponding to the shell 1; the rotor support 4 is fixed in the shell 1; one end of the magnetic rotor 3 is inserted on the rotor support 4, and the other end is inserted on the rotor impeller 21; the N Hall elements 5 are respectively arranged on the shell 1 and correspond to the positions of the magnetic rotors 3; the N Hall elements 5 are respectively and electrically connected with the controller; n is an integer greater than or equal to 2.
When the water flow sensor is used, water flows into the water flow sensor from a water inlet of the shell 1, the water flows are changed into a rotating state from a linear state after passing through the water flow turning cylinder 2 and impact the magnetic rotor 3, the Hall element 5 detects rotating magnetic fields of different magnetic poles, cuts magnetic lines of force, generates high and low pulse levels and outputs the high and low pulse levels to the controller, and then the controller calculates the water flow.
As shown in fig. 4, it is a schematic structural diagram of the hall element 5 in fig. 3. Each hall element 5 has a ground terminal 51, a power terminal 52, and a signal output terminal 53; the ground terminal of each hall element 5 is grounded; the controller is provided with N control ends and N signal input ends; the N control ends are electrically connected with the power supply ends of the N Hall elements 5 in a one-to-one correspondence manner; the N signal input ends are electrically connected with the signal output ends of the two Hall elements 5 in a one-to-one correspondence manner. The N control ends are used for controlling the power supply of the corresponding Hall element 5 so as to control the corresponding Hall element 5 to be in a working state or a dormant state; the N signal input ends are used for receiving water flow signals of the corresponding Hall elements 5.
In an alternative embodiment, the water flow sensor further comprises a flow stabilizer 6; the flow stabilizing core 6 is arranged at the water outlet of the shell 1. The flow stabilizing core 6 can play a role in stabilizing the water flow, and the water flow cannot be changed in a large range due to the change of the water inlet pressure.
in an alternative embodiment, more than two mounting grooves 7 are arranged on the shell 1; the N hall elements 5 are correspondingly inserted into the two or more mounting grooves 7 to be disposed on the housing 1.
Preferably, the N hall elements 5 are uniformly distributed around the periphery of the magnetic rotor 3. The N Hall elements 5 are symmetrically distributed, so that the probability that the N Hall elements 5 are damaged simultaneously can be reduced.
in an alternative embodiment, the water flow sensor further comprises a first retaining ring 8 and a second retaining ring 9; the first fixing ring 8 is arranged at the water outlet of the shell 1 to fix the flow stabilizing core 6; the second fixing ring 9 is arranged at the position, corresponding to the water inlet of the shell 1, of the water flow turning cylinder 2 so as to fix the water flow turning cylinder 2.
In an alternative embodiment, a sealing ring 10 is further provided between the flow stabilizing core 6 and the housing 1 to improve the sealing between the flow stabilizing core 6 and the housing 1.
In an alternative embodiment, the magnetic rotor 3 comprises a magnetic rotor body 31 and a rotor rod 32; the magnetic rotor body 31 is fixed on the rotor rod 32; a first limit groove is formed in the rotor support 4, and one end of the rotor rod 32 is matched with the first limit groove and inserted into the first limit groove; the rotor impeller 21 is provided with a second limit groove, and the other end of the rotor rod 32 is matched with the second limit groove and inserted therein.
compared with the prior art, the invention has the beneficial effects that: the invention provides a water flow detection method, which comprises the following steps: when water flow detection is needed, detecting whether N Hall elements arranged on a water flow sensor are in a normal state; when one and only one Hall element is in a normal state, the Hall element in the normal state is selected to participate in the current water flow detection work; when at least two Hall elements are in a normal state, comparing the length of accumulated working time of the at least two Hall elements; the accumulated working time is the historical total duration of each Hall element participating in water flow detection work; selecting the Hall element with the shortest accumulated working time and in the normal state to participate in the current water flow detection work, and controlling other Hall elements in the normal state to be in the dormant state; and acquiring water flow signals of the Hall elements participating in the water flow detection work at this time and calculating to obtain water flow data. Because the invention adopts a plurality of Hall elements and the Hall elements can automatically switch to participate in the work, the practical service life of the Hall elements can be effectively prolonged, and the working life of the water flow sensor is further prolonged; the fault rate of the water heater starting waterless reaction can be effectively reduced, and the reliability of the water heater is greatly improved. Meanwhile, the invention also provides a controller for executing the water flow detection method and a water flow sensor comprising the controller.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and changes can be made without departing from the principle of the present invention, and these modifications and changes are also considered to be within the scope of the present invention.
Claims (10)
1. a method for detecting water flow, the method comprising:
when water flow detection is needed, detecting whether N Hall elements arranged on a water flow sensor are in a normal state; n is an integer greater than or equal to 2;
When one and only one Hall element is in a normal state, the Hall element in the normal state is selected to participate in the current water flow detection work;
when at least two Hall elements are in a normal state, comparing the length of accumulated working time of the at least two Hall elements; the accumulated working time is the historical total duration of each Hall element participating in water flow detection work;
Selecting the Hall element with the shortest accumulated working time and in the normal state to participate in the current water flow detection work, and controlling other Hall elements in the normal state to be in the dormant state;
And acquiring water flow signals of the Hall elements participating in the water flow detection work at this time and calculating to obtain water flow data.
2. The method of claim 1, further comprising: and when the N Hall elements arranged on the water flow sensor are in an abnormal state, stopping water flow detection and prompting the fault of the water flow sensor.
3. the water flow detecting method according to claim 1, wherein the detecting whether N hall elements provided on the water flow sensor are in a normal state when the water flow detection is required comprises:
When water flow detection is needed, water flow detection signals are respectively sent to the N Hall elements to detect the water flow signals of the N Hall elements;
And respectively judging whether the N Hall elements are in a normal state or not according to the water flow signals of the N Hall elements.
4. The water flow detection method of claim 3, wherein the determining whether the N Hall elements are in a normal state according to the water flow signals of the N Hall elements respectively comprises:
When the value of the water flow signal of any Hall element is within a preset threshold range, judging that the corresponding Hall element is in a normal state;
and when the value of the water flow signal of any Hall element exceeds the threshold range, judging that the corresponding Hall element is in an abnormal state.
5. the method of claim 1, further comprising: and when the starting signal of the gas water heater is received, determining that water flow detection is required.
6. a controller comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the water flow detection method according to any one of claims 1 to 5 when executing the computer program.
7. a water flow sensor, comprising: the water flow direction changing device comprises a shell (1), a water flow direction changing cylinder (2), a magnetic rotor (3), a rotor support (4), N Hall elements (5) and a controller according to claim 6; the shell (1) is provided with a water inlet and a water outlet; the water flow turning cylinder (2) is arranged in the shell (1), and a rotor impeller (21) is arranged at a water inlet of the water flow turning cylinder (2) corresponding to the shell (1); the rotor support (4) is fixed in the shell (1); one end of the magnetic rotor (3) is inserted on the rotor support (4), and the other end of the magnetic rotor is inserted on the rotor impeller (21); the N Hall elements (5) are respectively arranged on the shell (1) and correspond to the magnetic rotor (3) in position; the N Hall elements (5) are respectively and electrically connected with the controller; n is an integer greater than or equal to 2.
8. a water flow sensor according to claim 7, further comprising a flow stabilizer core (6); the flow stabilizing core (6) is arranged at the water outlet of the shell (1).
9. water flow sensor according to claim 7, characterised in that the housing (1) is provided with more than two mounting slots (7); the N Hall elements (5) are correspondingly inserted into the more than two mounting grooves (7) to be arranged on the shell (1).
10. A water flow sensor according to claim 8, further comprising a first retaining ring (8) and a second retaining ring (9); the first fixing ring (8) is arranged at the water outlet of the shell (1) to fix the flow stabilizing core (6); the second fixing ring (9) is arranged at the position, corresponding to the water inlet of the shell (1), of the water flow turning cylinder (2) so as to fix the water flow turning cylinder (2).
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| CN104677450B (en) * | 2015-02-10 | 2017-12-29 | 金卡智能集团股份有限公司 | Intelligent gas meter samples counting structure |
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| US5063775A (en) * | 1987-08-19 | 1991-11-12 | Walker Sr Frank J | Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance |
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