Anti-interference signal receiving method and prepayment valve control water meter thereof

Abstract

The invention relates to an anti-interference signal receiving method, which comprises the following steps of: setting a receiver to have a dormancy period of Y seconds and a receiving window period of T seconds, Y is greater than T, T seconds is greater than a normal signal length, and in a standby state after the receiver is powered on, firstly performing dormancy of Y seconds, then ending dormancy and entering a receiving window lasting for T seconds, the receiver normally sleeps for Y seconds when the signal is not received in the receiving window period, the receiving window is prolonged for T seconds if the signal is received in the receiving window period, the receiving window continues to be prolonged for T seconds if the signal is received again in the prolonging period, otherwise, the receiver sleeps for Y seconds, the receiving window period is prolonged for N times, then the signal is judged to be a normal signal, and the receiver normally starts to receive the signal. Although the design is complicated, the power consumption is obviously reduced compared with the situation that the time and the power consumption of the receiving window are difficult to balance due to the fact that the power consumption is increased by using a fixed receiving window and lengthening the receiving window to increase the detection times and prevent mistaken touch.

Description

Technical Field

[0001] The present application relates to the field of signal anti-interference, and in particular to an anti-interference signal receiving method and a prepaid valve-controlled water meter thereof. Background Art

[0002] A long-distance wireless communication module is usually installed inside a prepaid valve-controlled water meter for recharging and prepaid use.

[0003] In common wireless communication modules, the internal signal receiving circuits receive signals in an intermittent manner to save energy. That is, the receiver of the wireless communication module will periodically open a fixed-time receiving window when no signal is detected. During the receiving window period, if a signal input is detected, the receiver of the wireless communication module will start a fixed-time receiving signal period to receive the signal.

[0004] By intermittently receiving signals, the wireless communication module can maintain a sleep state for a longer period of time in the absence of signal input to reduce power consumption.

[0005] However, in actual use, due to external noise or other interference sources, the receiver of the wireless communication module may be falsely awakened. According to actual statistics, the probability of false awakening is between 5% and 30% in different environments. Such a bit error rate will cause the receiving end of the wireless communication module to be frequently in working state, generating additional power consumption and leading to poor customer experience. If the receiving window period is directly increased, although the probability of false triggering will be reduced, the power consumption will naturally increase directly because the receiving window period is directly extended, which does not meet the low power consumption requirements of the chips for low-power and small wireless applications in actual use. At the same time, the extension of the receiving window period also requires the extension of the sleep time, which reduces the overall signal reception feedback frequency and is not suitable for actual use. Therefore, it is difficult to achieve a balance between the receiving window time and power consumption of the signal receiving method used in the existing chips for low-power and small wireless applications. Summary of the invention

[0006] In order to solve the problem that the traditional intermittent signal receiving method in the wireless communication module is difficult to balance the receiving window time and chip power consumption due to the fixed receiving window, the present application provides an anti-interference signal receiving method and a prepaid valve-controlled water meter thereof.

[0007] In the first aspect, the present application provides an anti-interference signal receiving method using the following technical solution: An anti-interference signal receiving method includes the following signal receiving process: first, the receiver is set to have a sleep state of Y seconds and a receiving window state of T seconds in a non-working state, wherein Y is greater than T and T is at least equal to the length of a normal signal; under normal conditions, after the receiver has been in a sleep state of Y seconds, the receiver ends the sleep state and switches to a receiving state lasting T seconds; if no signal is received within T seconds, the receiving state ends and switches back to the sleep state; if a signal is received within T seconds, the receiving state is extended by T seconds; during the extension period, if a signal is received again, the receiving state is further extended by T seconds; otherwise, it switches back to the sleep state; after successfully extending the receiving window period N times, it is judged to be normal data rather than interference noise or other interference sources, and the receiver starts normally to enter a long-term receiving mode, wherein N is set according to the local false wake-up probability.

[0008] Through the above technical solution, when the signal is received, the receiver is not activated immediately, but the receiving window is extended. Only after N consecutive verifications are passed, the receiver officially starts to receive normal data signals. Compared with the traditional method of starting normal data reception when a signal is received during the receiving window period, after adding multiple verification steps, it can effectively prevent the receiver from being falsely triggered by noise or other interference signals. Although the multiple verification steps complicate the design, the power consumption control can be significantly improved compared to the problems caused by using a fixed receiving window. Because of the traditional fixed receiving window, if the receiving window period is short, it is easy to be falsely triggered because verification cannot be performed, causing the module to enter a long-term receiving mode; if the window period is long, although verification can be performed during a longer window period, the power consumption will naturally increase. In actual use, it is difficult to balance the receiving window time and power consumption.

[0009] In the second aspect, the present application provides an anti-interference prepaid valve-controlled water meter using the following technical solution: An anti-interference prepaid valve-controlled water meter comprises a base and a shell, wherein a PCB board is installed in the shell, an MCU main control unit and a wireless communication module are installed on the PCB board, the MCU main control unit and the wireless communication module receive signals according to the above-mentioned signal receiving method, a battery compartment is arranged on the base, the shell cover is arranged on the base, and the battery compartment is designed as a single-cell battery compartment.

[0010] Because the above-mentioned anti-interference signal receiving method is used, the overall energy consumption of the wireless communication module is reduced. Since the main power consumption of the water meter lies in the wireless communication module, when the power consumption of the wireless communication module is reduced, the overall power consumption of the water meter is also greatly reduced. Therefore, the old dual-battery battery compartment design can be changed to a single-battery battery compartment design, thereby reducing the production cost and use cost of the water meter.

[0011] Optionally, an anti-interference layer is provided in the shell, and the anti-interference layer surrounds the battery compartment. A fixing mechanism is also provided in the shell, and the fixing mechanism is used for the anti-interference layer.

[0012] Optionally, the fixing mechanism includes a mounting cover mounted on the base, a clamping plate is provided on the inner wall of the mounting cover, the clamping plate is slidably mounted on the inner wall of the mounting cover along the normal direction of the inner wall of the mounting cover on which it is located, conductive rubber is filled between the clamping plate and the inner wall of the mounting cover, a mounting opening is opened on one side wall of the mounting cover, a sealing plate is installed on the mounting opening, the battery compartment slides through the mounting opening and is slidably mounted in the mounting cover, the battery compartment fits tightly against the clamping plate, the clamping plate presses against the conductive rubber, a clamping plate is also slidably mounted on one surface of the sealing plate, conductive rubber is also filled between the clamping plate and the plate surface of the sealing plate, the sealing plate is mounted on the mounting cover and closes the mounting opening, the clamping plate on the sealing plate fits tightly against the battery compartment packaging opening, and the sealing plate is mounted on the mounting cover by bolts.

[0013] Optionally, a connecting plate is provided on one end of the mounting cover connected to the base, the connecting plate closes the lower port of the mounting cover, a power supply port is provided on the top wall of the connecting plate, a power transmission port is provided on the side wall of the battery compartment, the power supply port and the power transmission port are plugged into each other, when the battery compartment is installed in the mounting cover and the sealing plate is installed, the power transmission port is plugged into the power supply port, and the power supply port supplies power to the base and the components in the shell through wires.

[0014] Optionally, at least two connecting blocks are provided on the outer wall of the mounting cover, and connecting holes are provided on the connecting blocks. The axis of the connecting holes is parallel to the sliding installation direction of the battery compartment, and connecting rods that slideably cooperate with the connecting holes are provided on the side walls of the sealing plate. When the sealing plate is installed, the connecting rods are slidably installed in the connecting holes.

[0015] Optionally, when the sealing plate and the battery compartment are installed, the side wall of the conductive rubber fits tightly against the inner wall of the mounting cover, the pressing plate and the conductive rubber on the sealing plate are cooperatively embedded in the mounting opening, and the conductive rubber on the sealing plate fits tightly against the inner wall of the mounting cover at the mounting opening.

[0016] To summarize, the present application improves the signal receiving method and formally starts the signal receiving program only after performing at least one verification after receiving the signal, so that the signal receiver of the valve-controlled water meter of the present application is not easily triggered by mistake. During long-term use, a large amount of power consumption can be saved. Moreover, due to the reduced power consumption, compared with the two batteries of the traditional valve-controlled water meter, only one battery is required, which reduces the volume of the battery compartment and enables an installation cover to be installed on the chassis of the water meter. An anti-interference layer is installed on the installation cover to isolate the battery, so as to reduce the electromagnetic interference generated when the battery is powered in the narrow space inside the water meter on the signal reception of the receiver and the measurement accuracy of the water meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flowchart of the signal receiving method in an embodiment of the present application.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the valve-controlled water meter of the present application.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the base of the present application.

[0020] Figure 4 It is a cross-sectional view of the mounting cover of the present application, wherein the battery compartment is not cut.

[0021] Figure 5 It is a cross-sectional view from another angle of the mounting cover of the present application.

[0022] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0023] Figure numerals: 1. base; 11. plug interface; 2. shell; 3. battery compartment; 31. power transmission port; 4. anti-interference layer; 41. conductive rubber; 5. fixing mechanism; 51. mounting cover; 511. mounting port; 512. plug board; 52. tightening plate; 53. sealing plate; 6. connecting plate; 61. power supply port; 7. electric wire; 8. connecting block; 81. connecting hole; 9. connecting rod. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-5 This application is described in further detail.

[0025] In the first aspect, the present application embodiment discloses an anti-interference signal receiving method, referring to Figure 1, including the following signal receiving process: when the receiver is in a non-working state, it has two states, a sleep state lasting Y seconds and a receiving window state lasting T seconds. When the sleep state duration ends, the receiver automatically switches to the receiving window state. After the receiving window state duration ends, the receiver automatically switches to the sleep state.

[0026] Y is greater than T, and T seconds is set to be greater than the length of the signal to be received.

[0027] Reference Figure 1 If the receiver receives a signal within the duration of the receiving window state, the receiving window state of the receiver is extended by T seconds. During the extension period of the receiving state of the receiver, if the receiver receives the same signal again, the receiving window state of the receiver is further extended by T seconds; if the receiver does not receive the same signal during the extension period of the receiving state of the receiver, the receiving state of the receiver ends and switches to a sleep state lasting Y seconds.

[0028] Reference Figure 1 ,After the receiving window period is successfully extended N times, it is determined that the signal source is a normal activation signal rather than an interference signal, and the receiver starts receiving the signal normally.

[0029] Reference Figure 1 In this embodiment, Y in the above signal determination process is set to 4.875, T is set to 0.125, and N is set to 2. In the actual operation process, the operator activates the receiver by pressing and holding the start button of the controller to repeatedly transmit the same signal for 6 seconds, and then the receiver starts to receive the signal normally. Compared with the traditional signal anti-interference method that increases the value of T and the length of the normal signal at the same time to avoid the shorter interference signal in the environment, but the overall power consumption will increase due to the lengthening of T, the above anti-interference signal reception method performs anti-interference by repeatedly determining the shorter signal, and the overall power consumption increased by anti-interference is smaller.

[0030] And after increasing the length of T, longer interference signals may be received and false triggering may occur. However, this application can effectively avoid the false triggering of most interference signals by performing signal judgment multiple times, and has stronger anti-interference ability. At the same time, due to the strong anti-interference ability, a better balance can be achieved between the time of the receiving window period and the power consumption. It can be adapted to most low-power and small wireless application chips, so that the power consumption of such chips is significantly reduced.

[0031] Second, refer to Figure 2The embodiment of the present application discloses a prepaid valve-controlled water meter using an anti-interference signal receiving method, including a base 1 and a shell 2, in which a PCB board is fixedly installed by bolts, and an MCU main control unit and a wireless communication module are welded on the PCB board.

[0032] Reference Figure 3 and Figure 4 The shell 2 is covered and installed on the base 1, and a battery compartment 3 and a fixing mechanism 5 are provided on the base 1. The battery compartment 3 is used to power the internal components of the water meter. The battery compartment 3 is covered with an anti-interference layer 4, and the anti-interference layer 4 is installed on the base 1 through the fixing mechanism 5.

[0033] Reference Figure 3 and Figure 4 The fixing mechanism 5 includes a rectangular installation cover 51, a connecting plate 6 is integrally arranged at the lower opening of the installation cover 51, and the connecting plate 6 closes the lower opening of the installation cover 51. Four plug boards 512 are integrally arranged on the bottom wall of the connecting plate 6. An insertion port 11 that is plugged in and matched with the plug board 512 is arranged on the base 1. The installation cover 51 is inserted on the base 1 through the cooperation between the plug board 512 and the plug port 11.

[0034] Reference Figure 3 and Figure 4 The anti-interference layer 4 is made of conductive rubber 41. A mounting opening 511 is provided on one side wall of the mounting cover 51 facing the length direction of the base 1. A fastening plate 52 is provided on the top wall and the side wall of the mounting cover 51. The conductive rubber 41 is filled between the fastening plate 52 and the inner side wall of the mounting cover 51. The top wall of the fastening plate 52 located on the side wall fits the bottom wall of the fastening plate 52 located on the top wall, and the fastening plate 52 located on the side wall relative to the mounting opening 511 of the mounting cover 51 fits the side walls of the other fastening plates 52. The bottom wall of the fastening plate 52 located on the top wall fits the top wall of the fastening plate 52 located on the side wall relative to the mounting opening 511 of the mounting cover 51.

[0035] Reference Figure 3 and Figure 4 The abutting plate 52 inside the mounting cover 51 is installed in the above-mentioned mounting method, which facilitates the disassembly and replacement of the abutting plate 52 and the conductive rubber 41. The battery compartment 3 is slidably mounted inside the mounting cover 51, and the end surface of the battery compartment 3 that slides into is an arc surface. When the battery compartment 3 is mounted inside the mounting cover 51, the side wall of the battery compartment 3 abuts against the abutting plate 52, and the abutting plate 52 abuts against the conductive rubber 41 to apply pressure to the conductive rubber 41, so that the conductive rubber 41 starts to work.

[0036] Reference Figure 3 and Figure 4A sealing plate 53 is also provided on the mounting cover 51, and a conductive rubber 41 and a pressing plate 52 are also provided on one side of the sealing plate 53. The sealing plate 53 is fixedly mounted on the mounting cover 51 by bolts, and the sealing plate 53 closes the mounting opening 511. At this time, the pressing plate 52 and the conductive rubber 41 on the sealing plate 53 slide through the mounting opening 511 and are fitted in the mounting cover 51. At this time, the sealing plate 53 presses against the conductive rubber 41, and the conductive rubber 41 presses against the pressing plate 52. The pressing plate 52 on the sealing plate 53 presses against the side wall of the battery compartment 3.

[0037] Reference Figure 3 and Figure 4 After the sealing plate 53 and the battery compartment 3 are installed, the conductive rubber 41 on the sealing plate 53 fits tightly against the side wall of the mounting opening 511 of the mounting cover 51 under the action of the extrusion force, and the conductive rubber 41 inside the mounting cover 51 fits tightly against the pressing plate 52 on the sealing plate 53 under the action of the extrusion force, so that a seal is formed between the mounting cover 51 and the sealing plate 53, so that the battery compartment 3 is not easily affected by moisture in the mounting cover 51.

[0038] Reference Figure 3 and Figure 4 At the same time, when the battery compartment 3 needs to be replaced, after opening the sealing plate 53, under the action of the elastic force of the conductive rubber 41, one end of the battery compartment 3 will be pushed out from the encirclement of the installed inner clamping plate 52, and then pliers can be used to more conveniently remove the battery compartment 3 from the installation cover 51 for replacement.

[0039] Reference Figure 3 and Figure 4 A power supply port 61 is fixedly installed on the top wall of the connecting plate 6, and the power supply port 61 supplies power to the electrical components inside the shell 2 through the wire 7. A power transmission port 31 is integrally provided on the side wall of the battery compartment 3. The power supply port 61 and the power transmission port 31 are plugged into each other. When the battery compartment 3 is installed in the installation cover 51 and the sealing plate 53 is installed, the power transmission port 31 is plugged into the power supply port 61.

[0040] Reference Figure 4 and Figure 5 Two connecting blocks 8 are integrally provided on the outer wall of the mounting cover 51, and a connecting hole 81 is opened on the connecting block 8. The axis of the connecting hole 81 is parallel to the sliding installation direction of the battery compartment 3, and a connecting rod 9 that slides with the connecting hole 81 is provided on the side wall of the sealing plate 53. When the sealing plate 53 is installed, the connecting rod 9 is slidably installed in the connecting hole 81.

[0041] Reference Figure 4 and Figure 5 Through the cooperation between the connecting rod 9 and the connecting hole 81, the positioning of the sealing plate 53 during installation is more convenient, and it is not easy to cause the bolts to fail to be tightened.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for receiving an anti-interference signal, characterized in that: The signal receiving process includes the following: first, the receiver is set to have a sleep state of Y seconds and a receiving window state of T seconds, where Y is greater than T, and T seconds is greater than the length of a normal signal. Under normal circumstances, after the receiver has been in a sleep state for Y seconds, the receiver ends the sleep state and switches to a receiving state lasting T seconds. If no signal is received within T seconds, the receiving state ends and switches back to the sleep state. If a signal is received within T seconds, the receiving state is extended by T seconds. During the extension period, if a signal is received again, the receiving state is continued to be extended by T seconds, otherwise it is switched back to the sleep state. After successfully extending the receiving window period N times, it is judged to be normal data rather than interference noise or other interference sources, and the receiver starts to receive the signal normally, where N is set according to the local false wake-up probability.

2. A prepaid valve-controlled water meter using an anti-interference signal receiving method, comprising a base (1) and a housing (2), wherein a PCB board is installed in the housing (2), and an MCU main control unit and a wireless communication module are installed on the PCB board, characterized in that: The MCU main control unit and the wireless communication module receive signals according to the anti-interference signal receiving method according to claim 1, a battery compartment (3) is provided on the base (1), the housing (2) cover is provided on the base (1), and the battery compartment (3) is designed as a single-cell battery compartment (3).

3. A prepaid valve-controlled water meter using an anti-interference signal receiving method according to claim 2, characterized in that: An anti-interference layer (4) is provided in the shell (2), the anti-interference layer (4) surrounds the battery compartment (3), and a fixing mechanism (5) is also provided in the shell (2), the fixing mechanism (5) is used for the anti-interference layer (4).

4. A prepaid valve-controlled water meter using an anti-interference signal receiving method according to claim 3, characterized in that: The fixing mechanism (5) comprises a mounting cover (51) mounted on the base (1); a retaining plate (52) is arranged on the inner wall of the mounting cover (51); the retaining plate (52) is slidably mounted on the inner wall of the mounting cover (51) along the normal direction of the inner wall of the mounting cover (51) where it is located; conductive rubber (41) is filled between the retaining plate (52) and the inner wall of the mounting cover (51); a mounting opening (511) is opened on one side wall of the mounting cover (51); a sealing plate (53) is mounted on the mounting opening (511); the battery compartment (3) is slidably mounted by passing through the mounting opening (511) In the mounting cover (51), the battery compartment (3) fits tightly against the retaining plate (52), the retaining plate (52) fits tightly against the conductive rubber (41), a retaining plate (52) is also slidably mounted on one surface of the sealing plate (53), the space between the retaining plate (52) and the plate surface of the sealing plate (53) is also filled with conductive rubber (41), the sealing plate (53) is mounted on the mounting cover (51) and closes the mounting opening (511), the retaining plate (52) on the sealing plate (53) fits tightly against the sealing opening of the battery compartment (3), and the sealing plate (53) is mounted on the mounting cover (51) by means of bolts.

5. A prepaid valve-controlled water meter using an anti-interference signal receiving method according to claim 4, characterized in that: A connecting plate (6) is provided on one end of the mounting cover (51) connected to the base (1), the connecting plate (6) closes the lower end of the mounting cover (51), a power supply port (61) is provided on the top wall of the connecting plate (6), a power transmission port (31) is provided on the side wall of the battery compartment (3), the power supply port (61) and the power transmission port (31) are plugged into each other, when the battery compartment (3) is installed in the mounting cover (51) and the sealing plate (53) is installed, the power transmission port (31) is plugged into the power supply port (61), and the power supply port (61) supplies power to the base (1) and the components in the housing (2) through the electric wire (7).

6. The anti-interference signal receiving method and prepaid valve-controlled water meter according to claim 5, characterized in that: At least two connection blocks (8) are arranged on the outer side wall of the installation cover (51), and a connection hole (81) is opened on the connection block (8). The axis of the connection hole (81) is parallel to the sliding installation direction of the battery compartment (3). A connection rod (9) that is slidingly matched with the connection hole (81) is arranged on the side wall of the sealing plate (53). When the sealing plate (53) is installed, the connection rod (9) is slidably installed in the connection hole (81).

7. A prepaid valve-controlled water meter using an anti-interference signal receiving method according to claim 6, characterized in that: When the sealing plate (53) and the battery compartment (3) are installed, the side wall of the conductive rubber (41) fits tightly against the inner side wall of the mounting cover (51), the abutting plate (52) and the conductive rubber (41) on the sealing plate (53) are cooperatively embedded in the mounting opening (511), and the conductive rubber (41) on the sealing plate (53) fits tightly against the inner side wall of the mounting cover (51) at the mounting opening (511), and the conductive rubber (41) in the mounting cover (51) fits tightly against the abutting plate (52) on the sealing plate (53).

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