CN219301750U - Alarm circuit, metering device, metering signal generating device and flowmeter - Google Patents
Alarm circuit, metering device, metering signal generating device and flowmeter Download PDFInfo
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- CN219301750U CN219301750U CN202223522989.1U CN202223522989U CN219301750U CN 219301750 U CN219301750 U CN 219301750U CN 202223522989 U CN202223522989 U CN 202223522989U CN 219301750 U CN219301750 U CN 219301750U
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Abstract
The application provides an alarm circuit, metering equipment, metering signal generation equipment and flowmeter, wherein, alarm circuit includes: the system comprises a first power supply module, a first voltage dividing module and a metering alarm module; the first power module is connected with a first end of the first voltage dividing module; the second end of the first voltage dividing module is connected with the first end of the second voltage dividing module of the metering signal generating device through a metering line; the second end of the second voltage dividing module is connected with a ground wire; the second end of the first voltage division module is connected with a first switching element of the metering signal generating device in series through the metering line and then grounded; the first switching element is connected in parallel with the second voltage dividing module; the opening and closing of the first switching element is controlled by a metering signal; the input end of the metering alarm module is connected with the second end of the first voltage dividing module. The alarm circuit solves the problem that the existing metering equipment cannot initiate an alarm after metering interruption.
Description
Technical Field
The application relates to the technical field of metering, in particular to an alarm circuit, metering equipment, metering signal generating equipment and a flowmeter.
Background
In production or living, it is often necessary to remotely meter a gas or liquid substance to be metered, such as natural gas, tap water, etc., used in production or living.
As shown in fig. 1, the metering system currently implementing remote metering includes a metering device 11 and a flow meter 12. The metering device 11 includes a metering component 111 and an alarm component 112. The flow meter 12 generates a pulsed metering signal after the material to be metered flows through the flow meter 12. A meter line and a ground line are disposed between the meter part 111 and the flowmeter 12. The metering unit 111 counts the pulse metering signal generated by the flowmeter 12 through a metering line and a ground line, and realizes remote metering of the substance to be metered. In order for the alarm component 112 to initiate an alarm in time after a meter line break, an alarm line is deployed between the alarm component 112 and the flow meter 12. The alarm line passes through the flow meter 12 and both ends of the alarm line are deployed on the alarm member 112. The two ends of the alarm line are respectively used as an emitting end and a receiving end of the alarm monitoring signal. The alarm line, the metering line and the ground line are hinged together to form an external connecting line. If the external connection line is broken, the metering component 112 is represented to be interrupted, and the alarm component 112 initiates an alarm due to the failure to receive the alarm monitoring signal.
If the metering line is damaged and the alarm line is not damaged in the external connection, the existing metering equipment cannot initiate an alarm after the metering is interrupted.
Disclosure of Invention
The application provides an alarm circuit, metering equipment, metering signal generation equipment and a flowmeter, so as to solve the problem that the existing metering equipment cannot initiate an alarm after metering interruption.
In a first aspect, the present application provides an alarm circuit, the alarm circuit comprising:
the system comprises a first power supply module, a first voltage dividing module and a metering alarm module;
the first power module is connected with a first end of the first voltage dividing module;
the second end of the first voltage dividing module is connected with the first end of the second voltage dividing module of the metering signal generating device through a metering line; the second end of the second voltage dividing module is connected with a ground wire;
the second end of the first voltage division module is connected with a first switching element of the metering signal generating device in series through the metering line and then grounded; the first switching element is connected in parallel with the second voltage dividing module; the opening and closing of the first switching element is controlled by a metering signal;
the input end of the metering alarm module is connected with the second end of the first voltage dividing module.
Optionally, the alarm circuit further includes: a first unidirectional conductive module;
the first unidirectional conductive module is connected between the first power module and the first end of the first voltage dividing module.
Optionally, the alarm circuit further includes: one or more filters;
if the number of the filters is one, the filters are connected with the second end of the first voltage division module and the ground wire;
if the number of the filters is a plurality, the plurality of filters are connected in parallel between the second end of the first voltage dividing module and the ground line.
Optionally, the alarm circuit further includes: a current limiting module;
the first end of the current limiting module is connected with the second end of the first voltage dividing module, and the second end of the current limiting module is connected with the input end of the metering alarm module.
In a second aspect, the present application provides an alarm circuit, the alarm circuit comprising:
the first switching element is connected with the first voltage division module;
the first end of the second voltage dividing module is connected with the second end of the first voltage dividing module of the metering equipment through a metering line; the first end of the first voltage dividing module is connected with a first power module of the metering equipment;
the first end of the second voltage dividing module is also connected with the input end of a metering alarm module of the metering equipment through the metering line;
the second end of the second voltage division module is grounded;
the second voltage division module is also connected with the first switching element in parallel, the first switching element is also connected with the metering signal generating module, and the opening and closing of the first switching element are controlled by the metering signal output by the metering signal generating module.
Optionally, the metering signal generating module includes: a second power supply module and a second switching element;
the second power supply module is connected with the second switching element in series;
the second switching element is connected in series with the first switching element; the opening and closing of the first switching element is controlled by an active metering signal through the second switching element.
Optionally, the alarm circuit further includes: a second unidirectional conductive module;
the second unidirectional conductive module is connected between the first end of the second voltage division module and the first switching element.
In a third aspect, the present application provides a metering device comprising the alarm circuit of the first aspect.
In a fourth aspect, the present application provides a metering signal generating apparatus, the flow meter comprising the alarm circuit of the second aspect.
In a fifth aspect, the present application provides a flow meter comprising the alarm circuit of the first aspect, and the alarm circuit of the second aspect.
The warning circuit, the metering equipment, the metering signal generating equipment and the flowmeter provided by the application, wherein the warning circuit comprises a first power supply module, a first voltage dividing module and a metering warning module; the first power module, the first voltage dividing module and the second voltage dividing module of the metering signal generating equipment are connected in series and then grounded to form a loop I; the first power module, the first voltage dividing module and the first switching element of the metering signal generating device are connected in series and then grounded to form a loop II; the first voltage dividing module is respectively connected with the second voltage dividing module and the first switching element through metering lines; the opening and closing of the first switch element are controlled by a metering signal, and the input end of the metering alarm module is connected with the second end of the first voltage dividing module; the metering alarm module can realize metering of substances to be metered corresponding to metering signals through measuring the voltage of the first circuit or the voltage of the second circuit, and the metering alarm module initiates an alarm through measuring the voltage of an alarm circuit with damaged metering lines and/or with damaged ground wires of the first circuit and the second circuit. The method and the device solve the problem that the existing metering equipment cannot initiate an alarm after metering interruption.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a diagram of a prior art metrology system architecture;
FIG. 2 is a first alarm circuit diagram provided in an embodiment of the present application;
FIG. 3 is a second alarm circuit diagram provided in an embodiment of the present application;
FIG. 4 is a third alarm circuit diagram provided in an embodiment of the present application;
FIG. 5 is a fourth alarm circuit diagram provided in an embodiment of the present application;
FIG. 6 is a block diagram of a metering device according to an embodiment of the present disclosure;
FIG. 7a is a diagram illustrating a first configuration of a metering signal generating apparatus according to an embodiment of the present application;
FIG. 7b is a second block diagram of the metering signal generating apparatus according to the embodiment of the present application;
FIG. 8a is a first flow meter block diagram provided in an embodiment of the present application;
fig. 8b is a second flow meter structure diagram according to an embodiment of the present application.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In this application, the pulsed metrology signal is also referred to as a metrology signal. The active signal is also referred to as an active metering signal. The passive signal is also referred to as a passive metering signal.
As shown in fig. 1, a conventional metering system for realizing remote metering includes a metering device 11 and a flow meter 12. The metering device 11 includes a metering component 111 and an alarm component 112. The flow meter 12 generates a pulsed metering signal after the material to be metered flows through the flow meter 12. The pulse metering signal can be an active signal or a passive signal. Wherein the active signal is a signal with fixed high and low levels only; the passive signal has no fixed high and low level, and is a pulse signal output in a switching value signal mode. The substance to be metered may be a gaseous substance or a liquid substance. A meter line and a ground line are disposed between the meter part 111 and the flowmeter 12. The metering unit 111 counts the pulse metering signal generated by the flowmeter 12 through a metering line and a ground line, and realizes remote metering of the substance to be metered. Illustratively, the metering component 111 detects and counts the high level or low level of the active signal generated by the flow 12 through the metering line and the ground line, and realizes remote metering of the substance to be metered corresponding to the active signal. Alternatively, the metering unit 111 detects and counts the pulse wave of the passive signal generated by the flowmeter 12 through the metering line and the ground line, and remotely meters the substance to be metered corresponding to the passive signal.
In order for the alarm component 112 to initiate an alarm in time after a meter line break, an alarm line is deployed between the alarm component 112 and the flow meter 12. Specifically, an alarm line passes through the flow meter 12, and both ends of the alarm line are disposed on the alarm member 112. The two ends of the alarm line are respectively used as an emitting end and a receiving end of the alarm monitoring signal. The alarm line, the metering line and the ground line are hinged together to form an external connecting line. The alarm component 112 issues an alarm monitoring signal through the sending end of the alarm line, and if the sent alarm monitoring signal can be received from the receiving end of the alarm line, the alarm component characterizes that the metering line is not damaged. If the external connection line is broken, the alarm line, the metering line and the ground line in the external connection line are all broken, the metering part 111 is interrupted when the metering line is broken, the alarm part 112 cannot receive the alarm monitoring signal when the alarm part 112 initiates an alarm. Thereby, it is achieved that in case of a broken external connection line where the metering line is located, the alarm means 112 initiates an alarm for the maintenance personnel to timely handle the broken metering line.
However, if the metering line is damaged and the alarm line is not damaged in the external connection, the existing metering device 11 cannot initiate an alarm after the metering is interrupted, so that the metering device 11 is interrupted for a long time, which adversely affects the production and life associated with the metering.
In this regard, the present application provides an alert circuit comprising: the system comprises a first power supply module, a first voltage dividing module and a metering alarm module; the first power module is connected with the first end of the first voltage dividing module; the second end of the first voltage dividing module is connected with the first end of the second voltage dividing module of the metering signal generating equipment through a metering line; the second end of the second voltage dividing module is connected with a ground wire; the second end of the first voltage division module is connected with a first switch element of the metering signal generating equipment in series through a metering line and then grounded; the first switching element is connected in parallel with the second voltage dividing module; the opening and closing of the first switching element is controlled by a metering signal; the input end of the metering alarm module is connected with the second end of the first voltage dividing module. In the alarm circuit provided by the application, the first power module, the first voltage dividing module and the second voltage dividing module are connected in series and then grounded to form a loop I. The first power module, the first voltage dividing module and the first switching element are connected in series and then grounded to form a loop II. Because the second voltage dividing module is connected with the first switching element in parallel, and the first switching element is controlled by the metering signal, the resistances of the first voltage dividing module and the second voltage dividing module are far greater than those of the first switching element, and the resistances of the first switching element are negligible. According to the method and the device, different voltage division states are realized through different combinations of the first voltage division module and the second voltage division module, the different voltage division states correspond to different metering states, and the metering alarm module only needs to measure voltages in the different voltage division states, so that the corresponding metering states can be determined.
The correspondence between different partial pressure states and different metering states is described as follows:
metering state one: the first switching element is closed by the metering signal, and the second voltage dividing module is in a state of being short-circuited by the first switching element. In this state, the voltage measured by the metering alarm module is the voltage between the second end of the first voltage dividing module in the second loop and the ground.
In the present application, the voltage measured by the metering alarm module in the metering state one is the voltage one. The first voltage represents the normal output state of the metering signal. The metering alarm module counts the metering signals according to the measured voltage I, so that metering of substances to be metered corresponding to the metering signals is realized.
Metering state two: the first switching element is not closed by the metering signal, i.e. the first switching element is open. In this state, the voltage measured by the metering alarm module is the voltage between the two ends of the second voltage dividing module in the loop I.
In the present application, the voltage measured by the metering alarm module in the metering state two is the voltage two. The second voltage represents a metering standby state without metering signal output.
Metering state three: and (3) measuring the damage of the wires and/or forming the ground wire damage state of the first circuit and the second circuit. If the ground wires forming the first circuit and the second circuit are damaged, the first power module, the first voltage dividing module and the second voltage dividing module cannot be grounded after being connected in series, the first circuit cannot be formed, and meanwhile, the first power module, the first voltage dividing module and the first switching element cannot be grounded after being connected in series, so that the second circuit cannot be formed. In the state, the voltage measured by the metering alarm module is the voltage of the alarm circuit after the circuit is broken between the first voltage dividing module and the metering signal generating equipment and/or the circuit is broken between the second voltage dividing module and the ground wire and the circuit is broken between the first switch element and the ground wire; or, in this state, the voltage measured by the metering alarm module is the voltage of the first power supply module.
In the present application, the voltage measured by the metering alarm module in the metering state three is voltage three. The voltage three characterizes the metering line damage and/or the ground line forming the first and second loops. And the metering state III also represents that the metering alarm module cannot meter the substances to be metered corresponding to the metering signal when the metering signal is normally output.
And if the metering alarm module measures the voltage III, the metering alarm module initiates an alarm.
Therefore, the warning circuit provided by the application solves the problem that the prior metering equipment cannot initiate warning after metering interruption under the condition that the metering line is damaged and the warning line is not damaged in an external connection on the premise of realizing metering of substances to be metered corresponding to metering signals.
The alarm circuit provided in the present application is described in connection with some embodiments.
Fig. 2 is a first alarm circuit diagram provided in an embodiment of the present application. As shown in fig. 2, the alarm circuit includes a first power module 21, a first voltage dividing module 22, and a metering alarm module 23.
The first power module 21 is connected to a first end of the first voltage dividing module 22.
The second end of the first voltage dividing module 22 is connected to the first end of the second voltage dividing module 24 of the metering signal generating device by a metering line. The second end of the second voltage dividing module 24 is connected to ground.
The metering signal generating device may be a flowmeter or other device capable of generating a metering signal of the substance to be metered, for example.
The second end of the first voltage dividing module 22 is also connected in series with the first switching element 25 of the metering signal generating device through a metering line and then grounded. The first switching element is connected in parallel with the second voltage dividing module. The opening and closing of the first switching element 25 is controlled by a metering signal.
Illustratively, the metering signal is a pulsed metering signal. The metering signal may be generated by the metering signal generating device after the substance to be metered flows through the metering signal generating device, or may be generated by the metering signal generating device after sensing the flowing substance to be metered. The metering signal may be an active signal or a passive signal. The active signal is also referred to as an active metering signal. The passive signal is also referred to as a passive metering signal.
An input end of the metering alarm module 23 is connected to a second end of the first voltage dividing module 22.
The first power module 21, the first voltage dividing module 22 and the second voltage dividing module 24 are connected in series and then grounded to form a loop I. The first power module 21, the first voltage dividing module 22 and the first switching element 25 are connected in series and then grounded to form a second loop.
Illustratively, the metering signal is assumed to be an active signal. The high and low levels of the active signal are periodically alternately present.
The active signal is input into the first switching element 25, and the high level of the active signal turns on the first switching element 25 to enable the first switching element 25 to be in a closed state; the low level of the active signal causes the first switching element 25 to be in an open state. Therefore, if an active signal is input to the first switching element 25, the first switching element 25 assumes periodic open and closed states. After the first switch element 25 is turned on, the metering alarm module 23 will measure the voltage one corresponding to the metering state one. The first voltage is the voltage between the second end of the first voltage dividing module 22 in the second loop and ground. Since the high level and the low level of the active signal are periodically alternately present, the active signal is also periodic to close and open the first switching element 25 correspondingly. If the metering alarm module 23 measures a periodic voltage one, the active signal is normally input to the first switching element 25. The metering alarm module 23 counts the measured periodic voltage to realize metering of the substance to be metered corresponding to the active signal.
If no active signal is input to the first switching element 25, the first switching element 25 is in an open state (or the first switching element is not closed by the active signal), and the metering alarm module 23 measures a voltage two corresponding to the metering state two. The second voltage is the voltage across the second voltage dividing module 24 in the first loop. If the metering alarm module 23 measures the continuous voltage II, the characterization alarm circuit is not damaged and the metering alarm module 23 is in a metering standby state.
Alternatively, since the low level of the active signal cannot turn on the first switching element 25 and the low level is periodically present, if the metering alarm module 23 measures the periodic voltage two, it indicates that the active signal is normally input to the first switching element 25. The metering alarm module 23 can count the measured periodic voltage two, so that the metering of the substance to be metered corresponding to the active signal can be realized.
If the metering line is damaged and/or the ground lines forming the first and second loops are damaged, the metering alert module 23 will measure the voltage three corresponding to the metering state three. The third voltage is the voltage after the disconnection between the first voltage dividing module 22 and the metering signal generating device, or the voltage of the first power module 21. If the metering alarm module 23 measures the voltage three, the damage of the metering line is represented, and the metering alarm module 23 initiates an alarm. Therefore, the metering alarm module 23 can determine that the metering line is damaged and/or that the ground lines forming the first and second loops are damaged, i.e. determine that the metering is abnormal, as long as the voltage three of the alarm circuit is measured.
Illustratively, if the metering signal is a passive signal. Since the passive signal is a pulse signal output in the form of a switching value signal. The switching value signal of the passive signal controls the opening and closing states of the first switching element 25. Since the first voltage, the second voltage and the third voltage of the alarm circuit are related to the closed state and the open state of the first switching element 25 and the damaged state of the metering line, the technical effect and the implementation manner of the alarm circuit with the metering signal being a passive signal are similar to those of the alarm circuit with the metering signal being an active signal, and are not repeated here.
Alternatively, the first voltage dividing module 22 and the second voltage dividing module 24 may be resistors.
Fig. 3 is a second alarm circuit diagram provided in an embodiment of the present application. Optionally, as shown in fig. 3, the alarm circuit further includes: the first unidirectional conductive module 31. The first unidirectional conductive module 31 is connected between the first power module 21 and the first end of the first voltage dividing module 22. The first unidirectional conductive module 31 may be used to isolate the interference signal from the first power module 21 or the environment, so as to avoid the interference signal from interfering with the metering or alarming of the metering and alarming module 23.
Illustratively, the first unidirectional conductive module 31 may be a diode.
Optionally, the alarm circuit further comprises: a filter 32.
The filter 32 is connected to the second terminal of the first voltage divider block 22 and ground.
Optionally, the number of filters 32 is one or more.
If the number of filters 32 is one, the filters 32 are connected to the second terminal of the first voltage dividing module 22 and to ground.
If the number of filters 32 is plural, the plural filters 32 are coupled in parallel between the second end of the first voltage dividing module 22 and the ground.
The filter 32 may be a capacitor, for example. The filter 32 is used for filtering the interference signal entering the alarm circuit to avoid the interference signal from interfering with the metering or alarm of the metering alarm module 23. Because the filtering capability of different capacitors on the interference signals is different, different types and different amounts of capacitors can be selected according to the types of the interference signals and arranged in the alarm circuit so as to effectively absorb the interference signals of different types to realize filtering.
Optionally, the alarm circuit further comprises: a flow restriction module 33. The first end of the current limiting module 33 is connected to the second end of the first voltage dividing module 22, and the second end of the current limiting module 33 is connected to the input end of the metering alarm module 23. The current limiting module 33 may be a resistor, which is used to limit the current of the interference signal entering the alarm circuit, and reduce the interference of the interference signal to the metering or alarm of the metering alarm module 23.
Optionally, a power switch is disposed on the first power module 21, and when the substance to be measured is not needed to be measured, the power switch on the first power module 21 can be turned on, and the power output of the first power module 21 is cut off, so as to reduce power consumption and save energy.
The warning circuit comprises a first power supply module, a first voltage dividing module and a metering warning module; the first power module is connected with a first end of the first voltage dividing module, a second end of the first voltage dividing module is connected with a first end of a second voltage dividing module of the metering signal generating device through a metering line, a second end of the second voltage dividing module is grounded, the second end of the first voltage dividing module is connected with a first switching element of the metering signal generating device in series through the metering line and then grounded, the first switching element is connected with the second voltage dividing module in parallel, opening and closing of the first switching element are controlled by the metering signal, and an input end of the metering alarm module is connected with a second end of the first voltage dividing module. The metering alarm module in the alarm circuit counts the periodic voltage I or voltage II of the measured alarm circuit, so that the metering of substances to be metered corresponding to metering signals is realized, under the premise of realizing metering of the substances to be metered, the metering alarm module can determine that the metering line is damaged and/or the ground wires forming the loop I and the loop II are damaged as long as the voltage III of the alarm circuit is measured, namely, the metering abnormality is determined, and the metering alarm is initiated.
The application also provides an alarm circuit. The alarm circuit provided in the present application is described below with reference to fig. 4 and 5. Fig. 4 is a third alarm circuit diagram provided in an embodiment of the present application. Fig. 5 is a fourth alarm circuit diagram provided in an embodiment of the present application.
As shown in fig. 4, the alarm circuit includes: a second voltage dividing module 24, a first switching element 25 and a metering signal generating module 41.
The first end of the second voltage dividing module 24 is connected to the second end of the first voltage dividing module 22 of the metering device by a metering line. The first end of the first voltage dividing module 22 is connected to the first power module 21 of the metering device.
The first end of the second voltage dividing module 24 is also connected with the input end of the metering alarm module 23 of the metering device through a metering line.
The second end of the second voltage dividing module 24 is grounded.
The second voltage dividing module 24 is also connected in parallel with the first switching element 25, the first switching element 25 is also connected with the metering signal generating module 41, and the opening and closing of the first switching element 25 is controlled by the metering signal of the substance to be metered output by the metering signal generating module 41. Optionally, as shown in fig. 4, the alarm circuit further includes: a second unidirectional conductive module 42.
The second unidirectional conductive module 42 is connected between the first end of the second voltage division module 24 and the first switching element 25, and is used for isolating an interference signal carried by the measurement signal, so as to avoid the interference of the interference signal on measurement or alarm of the measurement alarm module 23.
The second unidirectional conductive module 42 may be a diode.
Alternatively, the first switching element 25 may be a metal oxide semiconductor transistor (MOS transistor) or a triode.
The grid electrode of the MOS tube is used as the input end of the metering signal.
The base of the transistor serves as the input for the metering signal.
Further, as shown in fig. 5, if the metering signal generating module 41 needs to output an active signal, the metering signal generating module 41 includes: a second power supply module 411 and a second switching element 412.
The second power module 411 is connected in series with the second switching element 412.
The second switching element 412 is connected in series with the first switching element 25. The opening and closing of the first switching element 25 is controlled by an active metering signal through the second switching element 412. Illustratively, a high level of the active signal through the second switching element 412 turns on the first switching element 25, while a low level cannot turn on the first switching element 25.
Further, if the level of the active signal passing through the second switching element 412 is too high, which may cause the low level of the active signal to turn on the first switching element 25, the metering signal generating module 41 may further include: a fourth voltage division module 413, a fifth voltage division module 414, and a sixth voltage division module 415. The second power module 411, the second switching element 412 and the fourth voltage dividing module 413 are connected in series and then connected to the metering signal input end of the first switching element 25; the second power module 411, the second switching element 412 and the fifth voltage dividing module 414 are connected in series and then grounded; the second power module 411, the second switching element 412 and the sixth voltage dividing module 415 are connected in series and then grounded; so that the high level of the active signal inputted to the first switching element 25 turns on the first switching element 25 and the low level of the active signal inputted to the first switching element 25 cannot turn on the first switching element 25 by the voltage division of the fourth voltage division module 413, the fifth voltage division module 414, and the sixth voltage division module 415.
The alarm circuit provided by the embodiment comprises a second voltage dividing module 24, a first switching element 25 and a metering signal generating module 41, wherein the second voltage dividing module is connected with a first voltage dividing module and a first power module of metering equipment in series and grounded to form a loop, the second voltage dividing module is also connected with the first switching element in parallel, a first end of the second voltage dividing module is connected with a second end of the first voltage dividing module through a metering line, and a first end of the second voltage dividing module is also connected with an input end of a metering alarm module of the metering equipment through the metering line; the first switching element is also connected with the metering signal generating module, and the opening and closing of the first switching element are controlled by the metering signal of the substance to be metered output by the metering signal generating module. If the metering signal generating module needs to output the active signal, the metering signal generating module includes: the metering signal generating module may further include a fourth voltage dividing module, a fifth voltage dividing module, and a sixth voltage dividing module for dividing the active signal if the level of the active signal passing through the second switching element is too high, which may cause the first switching element to be turned on as well. The technical effects and the specific implementation principles of the alarm circuit provided in this embodiment are similar to those of the embodiment shown in fig. 2 or fig. 3, and are not repeated here.
The embodiment of the application also provides metering equipment. Fig. 6 is a block diagram of a metering device according to an embodiment of the present application. As shown in fig. 6, the metering device 60 includes an alarm circuit in the embodiment shown in fig. 2 or 3.
The technical effects and the specific implementation principles of the metering device provided in this embodiment are similar to those of the alarm circuit in the embodiment shown in fig. 2 or fig. 3, and are not repeated here. In addition, the metering equipment provided by the embodiment does not need to arrange an alarm line between the metering equipment and the flowmeter, so that resource saving is realized.
The embodiment of the application also provides metering signal generating equipment. FIG. 7a is a diagram illustrating a first configuration of a metering signal generating apparatus according to an embodiment of the present application; fig. 7b is a schematic diagram of a second embodiment of the metering signal generating apparatus according to the present application. As shown in fig. 7a, 7b, the metering signal generating device comprises an alarm circuit in the embodiment shown in fig. 4 or 5.
The technical effects and the specific implementation principles of the metering signal generating device provided in this embodiment are similar to those of the alarm circuit in the embodiment shown in fig. 4 or fig. 5, and are not described here again. In addition, the metering signal generating device provided by the embodiment does not need to arrange an alarm line between the metering device and the flowmeter, so that resource saving is realized.
The embodiment of the application also provides a flowmeter. Fig. 8a is a first flow meter structure diagram according to an embodiment of the present application. Fig. 8b is a second flow meter structure diagram according to an embodiment of the present application. As shown in fig. 8a, 8b, the flowmeter comprises any of the alarm circuits of the embodiments of fig. 2 or 3, and any of the embodiments of fig. 4 or 5.
The technical effects and the specific implementation principles of the flowmeter provided by the embodiment of the application are similar to those of the alarm circuit provided by the application, and the embodiment is not repeated here.
Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An alert circuit, the alert circuit comprising:
the system comprises a first power supply module, a first voltage dividing module and a metering alarm module;
the first power module is connected with a first end of the first voltage dividing module;
the second end of the first voltage dividing module is connected with the first end of the second voltage dividing module of the metering signal generating device through a metering line; the second end of the second voltage dividing module is connected with a ground wire;
the second end of the first voltage division module is connected with a first switching element of the metering signal generating device in series through the metering line and then grounded; the first switching element is connected in parallel with the second voltage dividing module; the opening and closing of the first switching element is controlled by a metering signal;
the input end of the metering alarm module is connected with the second end of the first voltage dividing module.
2. The alert circuit of claim 1, wherein the alert circuit further comprises: a first unidirectional conductive module;
the first unidirectional conductive module is connected between the first power module and the first end of the first voltage dividing module.
3. The alert circuit of claim 1, wherein the alert circuit further comprises: one or more filters;
if the number of the filters is one, the filters are connected with the second end of the first voltage division module and the ground wire;
if the number of the filters is a plurality, the plurality of filters are connected in parallel between the second end of the first voltage dividing module and the ground line.
4. A warning circuit according to any one of claims 1 to 3 wherein the warning circuit further comprises: a current limiting module;
the first end of the current limiting module is connected with the second end of the first voltage dividing module, and the second end of the current limiting module is connected with the input end of the metering alarm module.
5. An alert circuit, the alert circuit comprising:
the first switching element is connected with the first voltage division module;
the first end of the second voltage dividing module is connected with the second end of the first voltage dividing module of the metering equipment through a metering line; the first end of the first voltage dividing module is connected with a first power module of the metering equipment;
the first end of the second voltage dividing module is also connected with the input end of a metering alarm module of the metering equipment through the metering line;
the second end of the second voltage division module is grounded;
the second voltage division module is also connected with the first switching element in parallel, the first switching element is also connected with the metering signal generating module, and the opening and closing of the first switching element are controlled by the metering signal output by the metering signal generating module.
6. The alert circuit of claim 5, wherein the metering signal generating module comprises: a second power supply module and a second switching element;
the second power supply module is connected with the second switching element in series;
the second switching element is connected in series with the first switching element; the opening and closing of the first switching element is controlled by an active metering signal through the second switching element.
7. The alert circuit according to claim 5 or 6, wherein the alert circuit further comprises: a second unidirectional conductive module;
the second unidirectional conductive module is connected between the first end of the second voltage division module and the first switching element.
8. A metering device characterised in that it comprises an alarm circuit as claimed in any one of claims 1 to 4.
9. A metering signal generating device, characterized in that it comprises an alarm circuit as claimed in any one of claims 5-7.
10. A flow meter comprising the alarm circuit of any of claims 1-4, and the alarm circuit of any of claims 5-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223522989.1U CN219301750U (en) | 2022-12-28 | 2022-12-28 | Alarm circuit, metering device, metering signal generating device and flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223522989.1U CN219301750U (en) | 2022-12-28 | 2022-12-28 | Alarm circuit, metering device, metering signal generating device and flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219301750U true CN219301750U (en) | 2023-07-04 |
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ID=86952661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223522989.1U Active CN219301750U (en) | 2022-12-28 | 2022-12-28 | Alarm circuit, metering device, metering signal generating device and flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219301750U (en) |
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2022
- 2022-12-28 CN CN202223522989.1U patent/CN219301750U/en active Active
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