CN109724672B - Transmitter of electromagnetic wave material level switch and electromagnetic wave material level switch - Google Patents
Transmitter of electromagnetic wave material level switch and electromagnetic wave material level switch Download PDFInfo
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- CN109724672B CN109724672B CN201910156758.7A CN201910156758A CN109724672B CN 109724672 B CN109724672 B CN 109724672B CN 201910156758 A CN201910156758 A CN 201910156758A CN 109724672 B CN109724672 B CN 109724672B
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Abstract
The application relates to a transmitter of an electromagnetic wave material level switch and the electromagnetic wave material level switch, belonging to the technical field of electromagnetic wave material level switches. The application includes: the transmitting module is used for transmitting electromagnetic waves; the detection module is used for detecting the emission energy of the emission module and outputting a detection result signal; and the processing module is used for receiving the detection result signal, determining the actual emission energy of the emission module according to the detection result signal, judging whether the actual emission energy meets a preset condition or not, and if not, processing. The self-checking device is helpful for realizing self-checking processing of the transmitting energy of the transmitter, and further is helpful for improving the reliability of detection of the electromagnetic wave material level switch.
Description
Technical Field
The application belongs to the technical field of electromagnetic wave material level switches, and particularly relates to a transmitter of an electromagnetic wave material level switch and the electromagnetic wave material level switch.
Background
Electromagnetic wave level switches are commonly used in process control to monitor the presence of materials in pipelines, bins, and hoppers.
The electromagnetic wave material level switch comprises a transmitter and a receiver, wherein the transmitter and the receiver are arranged in a face-to-face mode. The transmitter transmits an electromagnetic wave signal, and if a transmission path from the transmitter to the receiver is blocked by an object that absorbs or reflects electromagnetic wave energy, the receiver will not detect the electromagnetic wave energy signal or receive a weak energy signal. The receiver judges whether a material is blocked between the emitter and the receiver according to the existence and the strength of the received signal, and the relay is controlled to output to realize the purposes of indication and control.
The receiver judges whether materials are blocked or not by setting an energy threshold value, the energy threshold value is set between an energy value received when no materials exist and an energy value received when materials are blocked, when the received energy is higher than the threshold value, no materials are blocked, and when the received energy is lower than the threshold value, materials are blocked. Different materials have different blocking capacities on electromagnetic waves, generally, materials with high dielectric constants have good blocking effects on the electromagnetic waves, and a receiver cannot receive signals or receives weak signals; however, the material with low dielectric constant has a poor effect of blocking electromagnetic waves, and even if the transmitter and the receiver are completely blocked, the received energy is strong and may approach the transmitted energy. Since the energy threshold is between the energy value received without material and the energy value received with material, the range is small, and usually the energy threshold is set close to the energy value received without material.
At present, a transmitter of an electromagnetic wave material level switch has no function of adjusting the energy of transmitted electromagnetic waves. The energy of the electromagnetic waves emitted by the emitter is influenced by external conditions, such as: temperature, aging, etc., it cannot be guaranteed that the emission energy value is never changed. The factors such as temperature change, meter aging and the like can cause the transmitted energy to be weaker than the preset energy value, so the received energy is weakened when no material exists. Under the condition, the received energy without the materials can be closer to the energy threshold value or even lower than the energy threshold value, and once the received energy is lower than the energy threshold value, the electromagnetic wave material level switch outputs a signal blocked by the materials, so that false alarm is caused.
For some special industries, the electromagnetic wave level switch is often used for ultra-low level alarm, and once the level breaks through the warning height, serious safety accidents can be caused, even casualties can be caused. In most industrial production processes, under the condition of good level control, the electromagnetic wave level switch is in a material blocking state for a long time, and the receiver cannot receive signals and does not act for a long time. Since the receiver does not operate for a long time, it is difficult to determine whether the transmitter is operating normally. If the transmitter fails, no energy is emitted or the energy is too low, the receiver cannot receive the signal. At present, the schemes in the related art cannot identify whether the transmitter fails. If the transmitter has a fault, but a user cannot find that the monitoring function of the whole electromagnetic wave level switch is invalid, once the material exceeds the ultralow level, due monitoring signal output cannot be realized, and the field emergency control system is invalid, so that serious production accidents can be caused, and even explosion accidents can occur in some industries.
Disclosure of Invention
For overcoming the problem that exists among the correlation technique at least to a certain extent, this application provides electromagnetic wave material level switch's transmitter and electromagnetic wave material level switch, helps realizing that the self-checking of transmitter transmission energy handles, and then helps promoting the reliability that electromagnetic wave material level switch detected.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides an electromagnetic wave material level switch's transmitter includes:
the transmitting module is used for transmitting electromagnetic waves;
the detection module is used for detecting the emission energy of the emission module and outputting a detection result signal;
and the processing module is used for receiving the detection result signal, determining the actual emission energy of the emission module according to the detection result signal, judging whether the actual emission energy meets a preset condition or not, and if not, processing.
Further, the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy of the emission module according to the detection result signal;
judging whether the actual emission energy meets the preset condition or not;
and if not, controlling the transmitting module to adjust the transmitting energy so that the actual transmitting energy of the transmitting module meets the preset condition after adjustment.
Further, the transmitting module includes:
an oscillator for generating a pulse signal;
the first amplifier is used for amplifying the pulse signal generated by the oscillator and outputting the amplified pulse signal;
and the antenna is used for receiving the amplified pulse signal output by the first amplifier and radiating the amplified pulse signal to form transmitting electromagnetic waves.
Further, the detection module includes:
the power divider is used for receiving the amplified pulse signal output by the first amplifier and dividing the amplified pulse signal into two paths for output, wherein one path of the pulse signal output by the power divider is transmitted to the antenna and radiated out through the antenna;
a mixer; the power divider is used for receiving the pulse signal generated by the oscillator and the pulse signal output by the other path of the power divider, performing frequency mixing processing and outputting a difference frequency signal;
the filter is used for receiving the difference frequency signal output by the mixer, performing filtering processing and outputting the filtered difference frequency signal;
and the second amplifier is used for receiving the filtered difference frequency signal output by the filter, amplifying the filtered difference frequency signal and outputting the amplified difference frequency signal to form the detection result signal.
Further, the detection module further comprises:
and the AD converter is used for receiving the amplified difference frequency signal output by the second amplifier, performing AD conversion on the amplified difference frequency signal and outputting a difference frequency digital signal to form the detection result signal.
Further, the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a first preset threshold energy or not;
if the difference value is smaller than the first preset threshold value, acquiring a difference value between the actual emission energy and the first preset threshold value energy, and determining whether the difference value is smaller than a preset threshold value difference value;
if the difference value is smaller than the first preset threshold value, the pulse signal generated by the oscillator is adjusted according to the difference value, so that the actual emission energy of the emission module is not smaller than the first preset threshold value energy after adjustment.
Further, the first amplifier is an adjustable amplifier, the adjustable amplifier is provided with a plurality of adjustable gears, and each gear is correspondingly adjusted with an energy level;
the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
determining an actual energy level corresponding to the actual emission energy according to a preset corresponding relation;
judging whether the actual energy level is a preset energy level or not, if not, controlling the first amplifier to adjust the gear so that the actual energy level corresponding to the actual emission energy of the emission module is the preset energy level after adjustment;
wherein, the preset corresponding relation comprises: a plurality of energy intervals, and each of the energy intervals corresponds to one of the energy levels that the first amplifier is capable of adjusting.
Further, the detection processing module is further specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a second preset threshold energy or not;
and if the actual emission energy is less than the second preset threshold energy, sending the actual emission energy or the difference value between the actual emission energy and the second preset threshold energy to a receiver of an electromagnetic wave level switch, so that the receiver lowers a trigger threshold to be matched with the actual emission energy of the transmitter, or so that the receiver gives an alarm.
Further, the transmitter further includes:
an alarm module;
the detection processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a third preset threshold energy or not;
and if the current value is less than the preset value, controlling the alarm module to give an alarm.
In a second aspect of the present invention,
the application provides an electromagnetic wave material level switch includes:
an emitter as claimed in any one of the above; and
a receiver.
This application adopts above technical scheme, possesses following beneficial effect at least:
this application helps realizing the self-checking of transmitter transmitting energy and handles through set up detection module and processing module in the transmitter of electromagnetic wave material level switch, and then helps promoting the reliability that electromagnetic wave material level switch detected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a transmitter provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an emitter with a self-test adjustment of emitted energy according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an emitter for self-testing to adjust emission energy through an oscillator according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an emitter configured to self-test transmitted energy adjusted by an adjustable amplifier according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a transmitter for sending data to a receiver after transmitting energy from a self-test is not satisfactory according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a transmitter with an alarm function according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electromagnetic wave level switch according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a transmitter provided in an embodiment of the present application; as shown in fig. 1, the transmitter 1 of the electromagnetic wave level switch includes:
a transmitting module 11 for transmitting electromagnetic waves;
a detection module 12, configured to detect the emission energy of the emission module 11, and output a detection result signal;
and the processing module 13 is configured to receive the detection result signal, determine actual emission energy of the emission module 11 according to the detection result signal, determine whether the actual emission energy meets a preset condition, and process the actual emission energy if the actual emission energy does not meet the preset condition.
In the related art, the practical application scenario of the electromagnetic wave level switch is that the electromagnetic wave level switch is in a monitoring working state for a long time, and in a long-term monitoring process accumulated day and month, the electromagnetic wave level switch is affected by the environment, such as: temperature, humidity, dust, collision of material consumption on an electromagnetic wave material level switch and the like, the energy value transmitted by the transmitter can not be guaranteed to be invariable, the electromagnetic wave material level switch is aged, the performance can be reduced, and the transmitted energy of the transmitter is weaker than the preset energy, so that the received energy is weakened when no material exists. In this case, the received energy without the material may be closer to the energy threshold or even lower than the energy threshold, and once the energy threshold is lower than the energy threshold, the electromagnetic wave level switch outputs a signal that the material blocks, resulting in false alarm.
In addition, the electromagnetic wave material level switch is in a material blocking state for a long time, and the receiver cannot receive signals and does not act for a long time. Since the receiver does not operate for a long time, it is difficult to determine whether the transmitter is operating normally. For some special industries, the electromagnetic wave level switch is often used for ultra-low level alarm, and once the level breaks through the warning height, serious safety accidents can be caused, even casualties can be caused. In most industrial production processes, under the condition of good level control, the electromagnetic wave level switch is in a material blocking state for a long time, and the receiver cannot receive signals and does not act for a long time. Since the receiver does not operate for a long time, it is difficult to determine whether the transmitter is operating normally. If the transmitter fails, no energy is emitted or the energy is too low, the receiver cannot receive the signal. At present, the schemes in the related art cannot identify whether the transmitter fails. If the transmitter has a fault, but a user cannot find that the monitoring function of the whole electromagnetic wave level switch is invalid, once the material exceeds the ultralow level, due monitoring signal output cannot be realized, and the field emergency control system is invalid, so that serious production accidents can be caused, and even explosion accidents can occur in some industries.
Through the scheme of the above embodiment of the present disclosure, the above various problems can be solved, in the transmitter 1 of the electromagnetic wave material level switch, the detection module 12 and the processing module 13 are arranged, the detection module 12 detects the transmission energy of the transmission module 11, and outputs a detection result signal, the processing module obtains the actual transmission energy of the transmission module 11 according to the detection result signal, and then judges whether the actual transmission energy meets the preset condition, if not, the processing is performed, so that the self-detection processing of the transmitter 1 of the electromagnetic wave material level switch can be realized through the scheme of the above embodiment, thereby being helpful for improving the reliability of the detection of the electromagnetic wave material level switch, and ensuring the effectiveness of the monitoring function of the electromagnetic wave material level switch. In some application scenarios, for example, monitoring performed by using the electromagnetic wave level switch includes safety monitoring, a protection can be further added in terms of safety through the above embodiment scheme of the present disclosure.
Fig. 2 is a schematic structural diagram of an emitter with a self-test adjustment of emitted energy according to an embodiment of the present application; as shown in fig. 2, the processing module 13 is specifically configured to:
receiving the detection result signal;
determining the actual emission energy of the emission module 11 according to the detection result signal;
judging whether the actual emission energy meets the preset condition or not;
if not, controlling the transmitting module 11 to adjust the transmitting energy, so that the actual transmitting energy of the transmitting module 11 satisfies the preset condition after adjustment.
In the above embodiment, in specific applications, the electromagnetic wave level switch is in a monitoring working state for a long time, and in a long-term monitoring process accumulated in a day and a month, the electromagnetic wave level switch is affected by the environment, such as: temperature, humidity, dust, collision of material consumption to the electromagnetic wave level switch, etc., which cannot ensure that the transmitting energy value of the transmitter 1 is invariable, the electromagnetic wave level switch is aged and may be degraded, the transmitting energy of the transmitter 1 does not satisfy the preset condition, however, in the long-term monitoring process of the electromagnetic wave level switch, the detecting module 12 also continuously detects the transmitting energy of the transmitting module 11, so that when the transmitting energy of the transmitter 1 does not satisfy the preset condition, the detecting energy is also detected, a corresponding detection result signal is transmitted to the processing module 13, the processing module 13 obtains the actual transmitting energy of the transmitting module 11 according to the detection result signal, when the actual transmitting energy does not satisfy the preset condition, the processing module 13 controls the transmitting module 11 to adjust the transmitting energy, so that the adjusted transmitting energy satisfies the preset condition again, therefore, the stability and effectiveness of actual emission energy are ensured, and the stability and effectiveness of the electromagnetic wave material level switch monitoring function are further ensured.
The following disclosure also gives specific embodiments of the transmitter 1 of the electromagnetic wave level switch for a detailed description.
Fig. 3 is a schematic structural diagram of an emitter for self-testing to adjust emission energy through an oscillator according to an embodiment of the present application; FIG. 4 is a schematic diagram of an emitter configured to self-test transmitted energy adjusted by an adjustable amplifier according to an embodiment of the present application;
as shown in fig. 3 and 4, the transmitting module 11 includes:
an oscillator 101 for generating a pulse signal;
a first amplifier 102, configured to amplify the pulse signal generated by the oscillator 101, and output the amplified pulse signal;
and the antenna 103 is used for receiving the amplified pulse signal output by the first amplifier 102 and radiating the amplified pulse signal to form a transmitting electromagnetic wave.
In practical applications, the oscillator 101 may be a VCO oscillator 101, that is, a voltage controlled oscillator 101, for generating a pulse signal, amplifying the pulse signal by an amplifier, and radiating the amplified pulse signal to a space through an antenna 103 to form a transmission electromagnetic wave.
In practical applications, the transmitting module 11 may be configured to transmit microwaves, and accordingly, the electromagnetic wave level switch is a microwave level switch.
In practical applications, the various components in the above-described embodiment of the transmitting module 11 are not modified by the present disclosure, and may adopt mature applications in the related art.
As shown in fig. 3 and 4, the detection module 12 includes:
the power divider 104 is configured to receive the amplified pulse signal output by the first amplifier 102, and divide the amplified pulse signal into two paths for output, where one path of the pulse signal output by the power divider 104 is transmitted to the antenna 103 and radiated by the antenna 103;
a mixer 105; the power divider is used for receiving the pulse signal generated by the oscillator 101 and the pulse signal output by the other path of the power divider 104, performing frequency mixing processing, and outputting a difference frequency signal;
a filter 106, configured to receive the difference frequency signal output by the mixer 105, perform filtering processing, and output a filtered difference frequency signal;
and a second amplifier 107, configured to receive the filtered difference frequency signal output by the filter 106, amplify the filtered difference frequency signal, and output an amplified difference frequency signal, so as to form the detection result signal.
In the above embodiment, the difference frequency signal is obtained through the frequency mixing processing of the frequency mixer 105, the change of the new energy amplitude of the difference frequency signal will reflect the change of the transmission energy, and after the filtering and amplifying processing, the obtained detection result signal is an analog signal, and in practical application, the analog signal can be sent to the processing module 13 having the AD conversion capability of itself for processing.
Further, as shown in fig. 3 and 4, the detection module 12 further includes:
an AD converter 108, configured to receive the amplified difference frequency signal output by the second amplifier 107, perform AD conversion on the amplified difference frequency signal, and output a difference frequency digital signal to form the detection result signal.
In the above embodiment, the signal is analog-to-digital converted by the independent AD converter 108, and the difference frequency digital signal is output and sent to the processing module 13, so that the processing module 13 does not need to perform AD conversion.
Likewise, in practical applications, the various components in the embodiment of the detection module 12 are not modified by the present disclosure, and may be adopted by the mature applications in the related art.
As shown in fig. 3, the processing module 13 is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a first preset threshold energy or not;
if the difference value is smaller than the first preset threshold value, acquiring a difference value between the actual emission energy and the first preset threshold value energy, and determining whether the difference value is smaller than a preset threshold value difference value;
if the difference is smaller than the first preset threshold, the pulse signal generated by the oscillator 101 is adjusted according to the difference, so that the actual emission energy of the emission module 11 is not smaller than the first preset threshold energy after adjustment.
In the above embodiment, the adjustment of the emission energy is realized by controlling the oscillator 101 to adjust the generated pulse signal, and in practical application, when the difference between the actual emission energy and the first preset threshold energy is greater than or equal to the preset threshold difference, it indicates that the energy of the emission module 11 is reduced too much, and it can be considered that the emission module 11 has a fault, so that when the difference between the actual emission energy and the first preset threshold energy is smaller than the preset threshold difference, it indicates that the emission module 11 can adjust the emission energy.
As shown in fig. 4, the first amplifier 102 is an adjustable amplifier, and the adjustable amplifier has a plurality of adjustable gears, and each gear is correspondingly adjusted by an energy level;
the processing module 13 is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
determining an actual energy level corresponding to the actual emission energy according to a preset corresponding relation;
judging whether the actual energy level is a preset energy level, if not, controlling the first amplifier 102 to adjust the gear so that the actual energy level corresponding to the actual emission energy of the emission module 11 is the preset energy level after adjustment;
wherein, the preset corresponding relation comprises: a plurality of energy intervals, and each of the energy intervals corresponds to one of the energy levels that the first amplifier 102 is capable of adjusting.
In practical applications, the adjustable amplifier has a plurality of adjustment steps, each step corresponds to an amplification factor, and thus each step corresponds to an energy level to be adjusted, for example, the adjustable amplifier employs an APA adjustable amplifier. In practical application, a suitable gear for using the adjustable amplifier is determined, the detected transmission energy corresponds to the energy level corresponding to the gear, and when the detected actual energy level is lower than the preset energy level, the processing module 13 controls the adjustable amplifier to automatically increase the amplification factor and adjust the amplification factor to the previous energy level. When the detected actual energy level is higher than the preset energy level, the processing module 13 controls the adjustable amplifier to automatically reduce the amplification factor and adjust the amplification factor to the next energy level. This ensures that the transmitted energy is within the energy range required for the measurement. For example, in the long-term daily and monthly usage process, due to the influence of various conditions, such as the influence of environmental conditions, the transmission energy of the transmission module 11 is reduced in the originally set gear, and is at the next energy level, which is not satisfactory, the processing module 13 controls the adjustable amplifier to automatically increase the amplification factor and adjust the amplification factor to the previous energy level.
It can be known that the self-checking processing in the above-mentioned solutions of the related embodiments relates to the processing of controlling the transmitting module 11 to adjust the transmitting energy after the processing module 13 self-checks the transmitting energy does not meet the requirement, and is one of the breakthrough directions for improving the reliability of the detection of the electromagnetic wave level switch and ensuring the effectiveness of the monitoring function of the electromagnetic wave level switch.
In addition, this disclosure still provides other different schemes that promote electromagnetic wave material level switch detection reliability, guarantee that electromagnetic wave material level switch monitoring function is effectual, specifically as follows:
fig. 5 is a schematic structural diagram of a transmitter for sending data to a receiver after transmitting energy from a self-test is not satisfactory according to an embodiment of the present application; as shown in fig. 5, the detection processing module 13 is further specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a second preset threshold energy or not;
and if the actual emission energy is less than the second preset threshold energy, sending the actual emission energy or the difference value between the actual emission energy and the second preset threshold energy to a receiver 2 of the electromagnetic wave level switch, so that the receiver 2 lowers a trigger threshold to be matched with the actual emission energy of the transmitter 1, or so that the receiver 2 gives an alarm.
In the above embodiment, when the transmitter 1 detects that the transmission energy does not meet the requirement, the processing method is to send the actual transmission energy that does not meet the requirement, or send the difference between the actual transmission energy and the second preset threshold energy to the receiver 2, and the receiver 2 processes the actual transmission energy, wherein one processing of the receiver 2 is to determine to reduce the trigger threshold of the receiver according to the actual transmission energy, or the difference between the actual transmission energy and the second preset threshold energy, and match the trigger threshold with the actual transmission energy of the transmitter 1, and the processing needs to be performed on the premise that the monitoring function of the electromagnetic wave level switch is still guaranteed to be effective; and the other treatment is that an alarm is given according to the actual emission energy or the difference between the actual emission energy and the second preset threshold energy, so that the condition that the monitoring function of the electromagnetic wave material level switch is failed is shown.
In practical application, the transmitter 1 sends data to the receiver 2, and the processors of both the transmitter 1 and the receiver 2 may be connected through a signal line to implement data transmission, or both may be respectively configured with a wireless communication module to implement data transmission, and so on.
The scheme of the embodiment can be used as a second breakthrough direction for improving the detection reliability of the electromagnetic wave material level switch and ensuring the monitoring function of the electromagnetic wave material level switch to be effective.
FIG. 6 is a schematic diagram of a transmitter with an alarm function according to an embodiment of the present application; as shown in fig. 6, the transmitter 1 further includes:
an alarm module 14;
the detection processing module 13 is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a third preset threshold energy or not;
and if the value is less than the preset value, controlling the alarm module 14 to give an alarm prompt.
In the above embodiment, when the transmitter 1 detects that the transmission energy is not satisfactory, the processing method is to alarm through the alarm module 14 configured by itself, in this scheme, the third preset threshold energy may be used as an alarm threshold for the failure of the transmission module 11, and when the actual transmission energy is smaller than the third preset threshold energy, it indicates that the transmission module 11 of the transmitter 1 has the failure, which indicates that the monitoring function of the electromagnetic wave level switch has failed.
The scheme of the embodiment can be used as a third breakthrough direction for improving the detection reliability of the electromagnetic wave material level switch and ensuring the monitoring function of the electromagnetic wave material level switch.
Fig. 7 is a schematic structural diagram of an electromagnetic wave level switch according to an embodiment of the present application, and as shown in fig. 7, the electromagnetic wave level switch 1001 includes:
the emitter 1 according to any of the above claims; and
a receiver 2.
The details of the transmitter 1 and the receiver 2 of the electromagnetic wave level switch 1001 in the above-described embodiment have been described in detail in the above-described embodiment relating to the method, and will not be elaborated upon here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present application may be integrated into one processing module 13, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (7)
1. A transmitter of an electromagnetic wave level switch, comprising:
the transmitting module is used for transmitting electromagnetic waves;
the detection module is used for detecting the emission energy of the emission module and outputting a detection result signal;
the processing module is used for receiving the detection result signal, determining the actual emission energy of the emission module according to the detection result signal, judging whether the actual emission energy meets a preset condition or not, and if not, controlling the emission module to adjust the emission energy so that the actual emission energy of the emission module meets the preset condition after adjustment; or judging whether the actual emission energy is smaller than a second preset threshold energy; if the actual emission energy is smaller than a second preset threshold value, the actual emission energy or the difference value between the actual emission energy and the second preset threshold value energy is sent to a receiver of an electromagnetic wave level switch, so that the receiver lowers a trigger threshold value to be matched with the actual emission energy of the transmitter;
wherein the transmitting module comprises:
an oscillator for generating a pulse signal;
the first amplifier is used for amplifying the pulse signal generated by the oscillator and outputting the amplified pulse signal;
the antenna is used for receiving the amplified pulse signal output by the first amplifier and radiating the amplified pulse signal to form transmitting electromagnetic waves;
wherein the detection module comprises:
the power divider is used for receiving the amplified pulse signal output by the first amplifier and dividing the amplified pulse signal into two paths for output, wherein one path of the pulse signal output by the power divider is transmitted to the antenna and radiated out through the antenna;
a mixer; the power divider is used for receiving the pulse signal generated by the oscillator and the pulse signal output by the other path of the power divider, performing frequency mixing processing and outputting a difference frequency signal;
the filter is used for receiving the difference frequency signal output by the mixer, performing filtering processing and outputting the filtered difference frequency signal;
and the second amplifier is used for receiving the filtered difference frequency signal output by the filter, amplifying the filtered difference frequency signal and outputting the amplified difference frequency signal to form the detection result signal.
2. The transmitter of claim 1, wherein the detection module further comprises:
and the AD converter is used for receiving the amplified difference frequency signal output by the second amplifier, performing AD conversion on the amplified difference frequency signal and outputting a difference frequency digital signal to form the detection result signal.
3. The transmitter according to claim 1 or 2, wherein the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a first preset threshold energy or not;
if the difference value is smaller than the first preset threshold value, acquiring a difference value between the actual emission energy and the first preset threshold value energy, and determining whether the difference value is smaller than a preset threshold value difference value;
if the difference value is smaller than the first preset threshold value, the pulse signal generated by the oscillator is adjusted according to the difference value, so that the actual emission energy of the emission module is not smaller than the first preset threshold value energy after adjustment.
4. The transmitter according to claim 1 or 2,
the first amplifier is an adjustable amplifier, the adjustable amplifier is provided with a plurality of adjustable gears, and each gear is correspondingly adjusted to one energy level;
the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
determining an actual energy level corresponding to the actual emission energy according to a preset corresponding relation;
judging whether the actual energy level is a preset energy level or not, if not, controlling the first amplifier to adjust the gear so that the actual energy level corresponding to the actual emission energy of the emission module is the preset energy level after adjustment;
wherein, the preset corresponding relation comprises: a plurality of energy intervals, and each of the energy intervals corresponds to one of the energy levels that the first amplifier is capable of adjusting.
5. The transmitter of claim 1, wherein the processing module is further specifically configured to:
judging whether the actual emission energy is smaller than a second preset threshold energy or not; and if the energy is less than the second preset threshold value, the receiver alarms.
6. The transmitter of claim 1, further comprising:
an alarm module;
the processing module is specifically configured to:
receiving the detection result signal;
determining the actual emission energy according to the detection result signal;
judging whether the actual emission energy is smaller than a third preset threshold energy or not;
and if the current value is less than the preset value, controlling the alarm module to give an alarm.
7. An electromagnetic wave level switch, comprising:
the transmitter of any one of claims 1-6; and
a receiver.
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| CN113280874B (en) * | 2021-06-17 | 2022-06-14 | 孚洛泰(重庆)科技有限公司 | Self-checking flowmeter and self-checking method thereof |
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