CN114751549A

CN114751549A - Reverse osmosis dosing system abnormal operation early warning system

Info

Publication number: CN114751549A
Application number: CN202210381145.5A
Authority: CN
Inventors: 郭云飞; 吴青云; 李昭; 孙龙飞; 马文德; 杜涛; 辛志波; 姚智; 谭祥帅; 赵威; 张林涛; 顿小宝; 张向涛
Original assignee: Xian Thermal Power Research Institute Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-15
Anticipated expiration: 2042-04-12
Also published as: CN114751549B

Abstract

The utility model provides a reverse osmosis medicine system unusual operation early warning system, this system includes reductant dosing pump trouble early warning device for first signal group, and judge whether the reverse osmosis medicine system appears first group operation anomaly based on first signal group, first signal group includes multiple reductant measuring pump operation on-off quantity signal, reducing agent solution case liquid level analog quantity signal before the first predetermined time quantum, reverse osmosis import mother pipe conductance analog quantity signal, the reverse osmosis import mother pipe conductance analog quantity signal before the second predetermined time quantum. According to this disclosed system, solved prior art and can't give the problem of more audio-visual early warning information of operating personnel when medicine system goes wrong.

Description

Abnormal operation early warning system of reverse osmosis dosing system

Technical Field

The disclosure relates to the technical field of thermotechnical control of water treatment systems, in particular to an abnormal operation early warning system of a reverse osmosis dosing system.

Background

The use of reverse osmosis units as desalination processes has been the most efficient and convenient method in various fields of water treatment systems. In order to ensure the safe and stable operation of the reverse osmosis device, a reducing agent and a scale inhibitor feeding system must be equipped. Although the dosing system plays a crucial role in the operation of the reverse osmosis device, operators often neglect to control the operation condition and the dosing amount of the dosing system in the actual production process. The condition that the dosing amount is insufficient or excessive often appears, the operating efficiency of the reverse osmosis device is directly influenced, even irreversible damage can be caused to the reverse osmosis membrane, and the service life of the membrane is shortened. In the prior art, a monitoring system for the operation condition of a dosing system is lacked in a reverse osmosis system, so that the monitoring system cannot give more visual early warning information to operators, and cannot timely perform corresponding treatment when the dosing system goes wrong, thereby ensuring the operation safety of a reverse osmosis device.

Disclosure of Invention

The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the early warning system for the abnormal operation of the reverse osmosis dosing system is provided, and the early warning system is mainly used for providing visual early warning information in time when the dosing system goes wrong.

According to the embodiment of the first aspect of the present disclosure, there is provided a reverse osmosis dosing system abnormal operation early warning system, including:

reducing agent dosing pump trouble early warning device for acquire first signal group, and based on first signal group judges whether reverse osmosis dosing system appears first group operation anomaly, first signal group includes multiple reducing agent measuring pump operation switching value signal, reducing agent solution case liquid level analog quantity signal, the female pipe conductance analog quantity signal of reverse osmosis import before the second preset time quantum before reducing agent solution case liquid level analog quantity signal, reverse osmosis import.

In one embodiment of the present disclosure, the reverse osmosis dosing system abnormal operation early warning system further includes: and the scale inhibitor dosing pump fault early warning device is used for acquiring a second signal group and judging whether the reverse osmosis dosing system has a second group abnormal operation or not based on the second signal group, wherein the second signal group comprises a scale inhibitor solution tank liquid level analog quantity signal, a scale inhibitor solution tank liquid level analog quantity signal before a third preset time period and a plurality of scale inhibitor metering pump operation switching quantity signals.

In one embodiment of the present disclosure, the reducing agent dosing pump fault early warning device includes: the first input module, the first judging module and the first output module are connected in sequence; the first input module comprises input units corresponding to signals in the first signal group, the first judgment module comprises a plurality of AND circuits, a plurality of OR circuits, a plurality of NOT circuits, a plurality of subtraction circuits, an absolute value circuit, a plurality of alternative switching circuits, a smaller circuit, a plurality of comparison larger circuits and a delay circuit, the first group of abnormal operation conditions comprises a plurality of abnormal operation conditions, and the first output module comprises output units corresponding to the various abnormal operation conditions.

In an embodiment of the disclosure, the first input module, the first determining module and the first output module include: the first input module comprises a first input unit for acquiring the operation switching value signal of the first reducing agent metering pump, a second input unit for acquiring the operation switching value signal of the second reducing agent metering pump, a third input unit for acquiring a liquid level analog quantity signal of the reducing agent solution tank, a fourth input unit for acquiring a liquid level analog quantity signal of the reducing agent solution tank before a first preset time period, a fifth input unit for acquiring a reverse osmosis inlet main pipe conductance analog quantity signal, and a sixth input unit for acquiring a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period; the first judgment module comprises a first AND circuit (S007), a second AND circuit (S010), a third AND circuit (S011), a fourth AND circuit (S013), a fifth AND circuit (S019), a sixth AND circuit (S020), a seventh AND circuit (S027), an eighth AND circuit (S028), a ninth AND circuit (S032), a first OR circuit (S008), a second OR circuit (S014), a third OR circuit (S029) and a first NOT circuit (S009), the circuit comprises a second NOT circuit (S023), a third NOT circuit (S030), a fourth NOT circuit (S031), a first subtraction circuit (S012), a second subtraction circuit (S021), a first absolute value circuit (S015), a first alternative switching circuit (S016), a second alternative switching circuit (S017), a first smaller ratio circuit (S018), a first larger ratio circuit (S022), a second larger ratio circuit (S025), a third larger ratio circuit (S026) and a delay circuit (S024); the first output module comprises a first output unit, a second output unit, a third output unit and a fourth output unit.

In one embodiment of the present disclosure, the first and circuit (S007) is simultaneously connected with the first input unit, the second input unit, the first not circuit (S009), and the third and circuit (S011), the first or circuit (S008) is simultaneously connected with the first input unit, the second input unit, and the second and circuit (S010), the second and circuit (S010) is simultaneously connected with the first not circuit (S009), and the sixth and circuit (S020), the first subtraction circuit (S012) is simultaneously connected with the third input unit, the fourth input unit, and the first absolute value circuit (S015), the first absolute value circuit (S015) is simultaneously connected with the first less than circuit (S018), the second more than circuit (S025), and the third more than circuit (S026), the first less than circuit (S018) is simultaneously connected with the second one-of-selecting switching circuit (S017) and the fifth of switching circuit (S019), the fifth and circuit (S019) is simultaneously connected with the third and circuit (S011), the fifth and the third and circuit (S011), A sixth AND circuit (S020) and a third NOT circuit (S030), a third AND circuit (S011) is connected with the first output unit, the sixth AND circuit (S020) is connected with the second output unit, a second alternative switching circuit (S017) is simultaneously connected with a fourth AND circuit (S013) and a first alternative switching circuit (S016), a fourth AND circuit (S013) is simultaneously connected with the first input unit and the second input unit, a second OR circuit (S014) is simultaneously connected with the first input unit, the second input unit, the first alternative switching circuit (S016), a fifth AND circuit (S019), the second NOT circuit (S023) and an eighth AND circuit (S028), a second subtractor circuit (S021) is simultaneously connected with the fifth input unit, the sixth input unit and the first greater than circuit (S023), a first greater than circuit (S022) is connected with the circuit (S022), and a seventh delay circuit (S027) is connected with the circuit (S023), the seventh and circuit (S027) is connected with the second comparison greater circuit (S025) and the third OR circuit (S029) at the same time, the delay circuit (S024) is connected with the ninth and circuit (S032), the third comparison greater circuit (S026) is connected with the eighth and circuit (S028), the eighth and circuit (S028) is connected with the third OR circuit (S029), the third OR circuit (S029) is connected with the fourth NOT circuit (S031) and the fourth output unit at the same time, and the ninth and circuit (S032) is connected with the third NOT circuit (S030), the fourth NOT circuit (S031) and the third output unit at the same time.

In an embodiment of the present disclosure, the reducing agent dosing pump fault early warning device is further configured to: judging whether a first condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period and a first preset speed, and if so, outputting a first abnormal signal by a first output unit; judging whether a second condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period and a second preset speed, if so, outputting a second abnormal signal by a second output unit, wherein the second preset speed is smaller than the first preset speed; judging whether a third condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period, a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period and a preset rising rate, and if so, outputting a third abnormal signal by a third output unit; and judging whether the fourth condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period, a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period, a third preset speed and a fourth preset speed, and if so, outputting a fourth abnormal signal by a fourth output unit.

In one embodiment of the present disclosure, the scale inhibitor dosing pump fault early warning device includes: the second input module, the second judgment module and the second output module are connected in sequence; the second input module comprises input units corresponding to signals in the second signal group, the second judgment module comprises an absolute value circuit, a plurality of alternative switching circuits, an adding circuit, a subtracting circuit, a function combination circuit, a plurality of comparison larger circuits, a comparison smaller circuit, a comparison equal circuit, a plurality of AND circuits and/or circuits, the second group of abnormal operation conditions comprises a plurality of abnormal operation conditions, and the second output module comprises output units corresponding to the various abnormal operation conditions.

In an embodiment of the disclosure, the second input module, the second determining module and the second output module include: the second input module comprises a seventh input unit for acquiring a scale inhibitor solution tank liquid level analog quantity signal, an eighth input unit for acquiring a scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, a ninth input unit for acquiring a first scale inhibitor metering pump operation switching quantity signal, a tenth input unit for acquiring a second scale inhibitor metering pump operation switching quantity signal, an eleventh input unit for acquiring a third scale inhibitor metering pump operation switching quantity signal, a twelfth input unit for acquiring a fourth scale inhibitor metering pump operation switching quantity signal, a thirteenth input unit for acquiring a fifth scale inhibitor metering pump operation switching quantity signal and a fourteenth input unit for acquiring a sixth scale inhibitor metering pump operation switching quantity signal; the second judgment module comprises a second absolute value circuit (S046), a third alternative switching circuit (S048), a fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), an addition circuit (S054), a third subtraction circuit (S045), a function combination circuit (S055), a fourth comparison larger circuit (S056), a fifth comparison larger circuit (S058), a sixth comparison larger circuit (S059), a second comparison smaller circuit (S047), a comparison equal circuit (S057), a tenth comparison circuit (S060), an eleventh comparison circuit (S061), a twelfth comparison circuit (S062) and a fourth or circuit (S063); the second output module comprises a fifth output unit and a sixth output unit.

In one embodiment of the present disclosure, the third subtracting circuit (S045) is simultaneously connected with the seventh input unit, the eighth input unit, and the second absolute value circuit (S046), the second absolute value circuit (S046) is simultaneously connected with the second smaller circuit (S047), the fifth comparison larger circuit (S058), and the sixth comparison larger circuit (S059), the second smaller circuit (S047) is simultaneously connected with the function combining circuit (S055), and the twelfth and circuit (S062), the third two-selection switching circuit (S048), the fourth two-selection switching circuit (S049), the fifth two-selection switching circuit (S050), the sixth two-selection switching circuit (S051), the seventh two-selection switching circuit (S052), the eighth two-selection switching circuit (S3) is respectively connected with the ninth input unit, the tenth input unit, the eleventh input unit, the twelfth input unit, the thirteenth input unit, and the fourteenth input unit, the addition circuit (S054) is simultaneously connected with a third alternative switching circuit (S048), a fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), a function combination circuit (S055), a fourth comparison greater circuit (S056) and a comparison equal circuit (S057), the fourth comparison greater circuit (S056) is simultaneously connected with a tenth and circuit (S060) and a twelfth and circuit (S062), the comparison equal circuit (S057) is connected with an eleventh and circuit (S061), the tenth and circuit (S060) is simultaneously connected with the fifth comparison greater circuit (S058) and a fourth or circuit (S063), the eleventh and circuit (S061) is simultaneously connected with a sixth comparison greater circuit (S063) and a fourth or circuit (S063), the eleventh and circuit (S061) is simultaneously connected with the sixth comparison greater than the sixth comparison circuit (S059) and the fourth or the twelfth and circuit (S062), and the output unit, the fourth or circuit (S063) is connected to the sixth output unit.

In one embodiment of the disclosure, the scale inhibitor dosing pump fault early warning device is further configured to: judging whether a fifth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, the first scale inhibitor metering pump operation switching quantity signal, the second scale inhibitor metering pump operation switching quantity signal, the third scale inhibitor metering pump operation switching quantity signal, the fourth scale inhibitor metering pump operation switching quantity signal, the fifth scale inhibitor metering pump operation switching quantity signal and the sixth scale inhibitor metering pump operation switching quantity signal, and if so, outputting a fifth abnormal signal by a fifth output unit; and judging whether a sixth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, a first scale inhibitor metering pump operation switching quantity signal, a second scale inhibitor metering pump operation switching quantity signal, a third scale inhibitor metering pump operation switching quantity signal, a fourth scale inhibitor metering pump operation switching quantity signal, a fifth scale inhibitor metering pump operation switching quantity signal, a sixth scale inhibitor metering pump operation switching quantity signal, a fifth preset speed and a sixth preset speed, and if so, outputting a sixth abnormal signal by a sixth output unit.

In one or more embodiments of the present disclosure, the reducing agent dosing pump fault early warning device is configured to determine whether the reverse osmosis dosing system has a first set of abnormal operation based on a first signal set, where the first signal set includes a plurality of reducing agent dosing pump operation switching value signals, a reducing agent solution tank liquid level analog quantity signal before a first preset time period, a reverse osmosis inlet main pipe conductance analog quantity signal, and a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period. Under the condition, corresponding treatment is carried out by timely acquiring operation switching value signals of various reducing agent metering pumps, reducing agent solution tank liquid level analog quantity signals before a first preset time period, reverse osmosis inlet main pipe conductance analog quantity signals and reverse osmosis inlet main pipe conductance analog quantity signals before a second preset time period, and when a reducing agent dosing pump in a reverse osmosis dosing system fails, visual early warning information is timely output, so that the problem that in the prior art, operators cannot give visual early warning information when a dosing system fails, corresponding treatment cannot be timely carried out when the dosing system fails is solved, and the problem of operation safety of a reverse osmosis device is guaranteed.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a block diagram of a first reverse osmosis dosing system abnormal operation early warning system provided by an embodiment of the disclosure;

FIG. 2 shows a block diagram of a reductant dosing pump fault early warning device provided by an embodiment of the disclosure;

FIG. 3 shows a circuit diagram of a reducing agent dosing pump fault warning device provided by an embodiment of the disclosure;

fig. 4 shows a second reverse osmosis dosing system abnormal operation early warning system provided by the embodiment of the disclosure;

fig. 5 shows a block diagram of a fault early warning device of a scale inhibitor dosing pump provided in an embodiment of the disclosure;

fig. 6 shows a circuit diagram of a fault early warning device of a scale inhibitor dosing pump provided by the embodiment of the disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosed embodiments, as detailed in the appended claims.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. It should also be understood that the term "and/or" as used in this disclosure refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present disclosure, and should not be construed as limiting the present disclosure.

Among the existing water treatment systems, reverse osmosis systems have been the most efficient and convenient method for desalination. In order to ensure the safe and stable operation of the reverse osmosis system, the reverse osmosis system is also provided with a reducing agent and scale inhibitor dosing system. Because the reducing agent and the scale inhibitor dosing system play a vital role in the operation of the reverse osmosis system, the operation condition and the dosing amount of the dosing system need to be concerned in the actual production process, the condition that the operation of the reverse osmosis system is abnormal or the dosing amount is insufficient or excessive is avoided, the operation efficiency of the reverse osmosis system is influenced, even the reverse osmosis membrane is irreversibly damaged, and the service life of the membrane is shortened. Therefore, the monitoring and early warning system for the operation condition of the dosing system is provided, so that the more intuitive early warning information is given to operators in time, and the monitoring and early warning system is very important.

In a first embodiment, fig. 1 shows a block diagram of a first reverse osmosis dosing system operation abnormality early warning system provided by an embodiment of the present disclosure. The early warning system for the abnormal operation of the reverse osmosis dosing system in the disclosure can be referred to as an early warning system for short. As shown in fig. 1, the reverse osmosis dosing system operation abnormality early warning system 10 includes a reducing agent dosing pump failure early warning device 11.

In this embodiment, the reducing agent dosing pump failure early warning device 11 is used to determine whether an abnormality occurs in a reducing agent dosing pump (i.e., a reducing agent dosing system) in the reverse osmosis dosing system. Specifically, the reducing agent dosing pump fault early warning device 11 may be configured to acquire a first signal group, and determine whether the reverse osmosis dosing system has a first group of abnormal operations based on the first signal group. The first signal group comprises a plurality of reducing agent metering pump operation switching value signals, reducing agent solution tank liquid level analog quantity signals before a first preset time period, reverse osmosis inlet main pipe conductance analog quantity signals and reverse osmosis inlet main pipe conductance analog quantity signals before a second preset time period. The operation switching value signal of the various reducing agent metering pumps, the liquid level analog quantity signal of the reducing agent solution tank and the reverse osmosis inlet main pipe conductance analog quantity signal are signals at the current moment. The first preset time period may be, for example, 10 min. The second preset time period may be, for example, 10 min. The first and second preset time periods of the present disclosure are not limited thereto.

Fig. 2 shows a block diagram of a reducing agent dosing pump fault early warning device provided by an embodiment of the disclosure.

In the embodiment, as shown in fig. 2, the reducing agent dosing pump fault early warning device 11 includes a first input module 111, a first determination module 112, and a first output module 113, which are connected in sequence. The first input module 111 is used for acquiring a first signal group. The first judging module 112 is configured to process the acquired first signal set to judge whether the reverse osmosis dosing system has a first set of abnormal operation. The first output module 113 is configured to output a first set of operational anomalies.

In this embodiment, the first input module 111 includes an input unit corresponding to each signal in the first signal group, that is, the first input module 111 includes a plurality of input units, each of which acquires one signal in the first signal group. Each input element may be represented by the symbol DI or AI.

In the present embodiment, the first determining module 112 includes a plurality of AND circuits (AND), a plurality of OR circuits (OR), a plurality of NOT circuits (NOT), a plurality of subtraction circuits (SUB), an absolute value circuit (ABS), a plurality of one-out-of-two switching circuits (T), a smaller comparison circuit (LT), a plurality of comparison larger circuits (GT), AND a delay circuit (TON).

In this embodiment, the first group of abnormal operation may include a plurality of abnormal operation conditions, and the first output module 113 includes output units corresponding to the various abnormal operation conditions, that is, the first output module 113 includes a plurality of output units, and each output unit outputs one abnormal operation condition. Each output cell may be represented by the symbol DO.

Fig. 3 shows a circuit diagram of a reducing agent dosing pump fault early warning device provided by an embodiment of the disclosure.

In some embodiments, the plurality of reducing agent metering pump operation switching value signals are two signals, and as shown in fig. 3, the first input module 111 includes a first input unit (S001) for obtaining the first reducing agent metering pump operation switching value signal, a second input unit (S002) for obtaining the second reducing agent metering pump operation switching value signal, a third input unit (S003) for obtaining the reducing agent solution tank liquid level analog value signal, a fourth input unit (S004) for obtaining the reducing agent solution tank liquid level analog value signal before the first preset time period, a fifth input unit (S005) for obtaining the reverse osmosis inlet main pipe conductance analog value signal, and a sixth input unit (S006) for obtaining the reverse osmosis inlet main pipe conductance analog value signal before the second preset time period.

As shown in fig. 3, the first determining module 112 includes a first and circuit (S007), a second and circuit (S010), a third and circuit (S011), a fourth and circuit (S013), a fifth and circuit (S019), a sixth and circuit (S020), a seventh and circuit (S027), an eighth and circuit (S028), a ninth and circuit (S032), a first or circuit (S008), a second or circuit (S014), a third or circuit (S029), and a first not circuit (S009), the circuit comprises a second NOT circuit (S023), a third NOT circuit (S030), a fourth NOT circuit (S031), a first subtraction circuit (S012), a second subtraction circuit (S021), a first absolute value circuit (S015), a first alternative switching circuit (S016), a second alternative switching circuit (S017), a first smaller proportion circuit (S018), a first larger proportion circuit (S022), a second larger proportion circuit (S025), a third comparison larger proportion circuit (S026) and a time delay circuit (S024). The two input ends of the first one-of-two switching circuit (S016) respectively obtain a first preset rate and a second preset rate, the first preset rate and the second preset rate are two set liquid level change values of the reducing agent solution tank, the second preset rate is smaller than the first preset rate, the first preset rate is 1.5mm/min, for example, and the second preset rate is 1.2mm/min, for example. An input of the second one-of-two switching circuit (S017) obtains a second preset rate. The first comparison is larger than the preset ramp rate obtained at one input (i.e., input 1) of the circuit (S022). The second comparison is greater than an input (i.e., input 1) of the circuit (S025) to obtain a first preset ripple change value, which is, for example, 0.5 mm/min. The third comparison is greater than an input (i.e., input 1) of the circuit (S026) to obtain a second preset fluctuation value, which is, for example, 3 mm/min. One input (i.e., input 1) of the delay circuit (S024) acquires a preset duration, which is, for example, 5S.

As shown in fig. 3, the first output module 113 includes a first output unit (S033) outputting a first abnormal signal, a second output unit (S034) outputting a second abnormal signal, a third output unit (S035) outputting a third abnormal signal, and a fourth output unit (S036) outputting a fourth abnormal signal. The first abnormal signal represents that the first reverse osmosis dosing system operates abnormally, the second abnormal signal represents that the second reverse osmosis dosing system operates abnormally, the third abnormal signal represents that the third reverse osmosis dosing system operates abnormally, and the fourth abnormal signal represents that the fourth reverse osmosis dosing system operates abnormally.

As shown in fig. 3, the first and circuit (S007) is simultaneously connected with the first input unit (S001), the second input unit (S002), the first not circuit (S009), and the third and circuit (S011), the first or circuit (S008) is simultaneously connected with the first input unit (S001), the second input unit (S002), and the second and circuit (S010), the second and circuit (S010) is simultaneously connected with the first not circuit (S009), and the sixth and circuit (S020), the first subtraction circuit (S012) is simultaneously connected with the third input unit (S003), the fourth input unit (S004), and the first absolute value circuit (S015), the first absolute value circuit (S015) is simultaneously connected with the first comparison circuit (S018), the second comparison larger circuit (S025), and the third comparison larger circuit (S026), the first comparison circuit (S018) is simultaneously connected with the second selection circuit (S017) and the third comparison larger circuit (S026), the fifth and circuit (S019) is simultaneously connected with the third and circuit (S011), the sixth and circuit (S020) and the third not circuit (S030), the third and circuit (S011) is connected with the first output unit, the sixth and circuit (S020) is connected with the second output unit, the second one-out switching circuit (S017) is simultaneously connected with the fourth and circuit (S013) and the first one-out switching circuit (S016), the fourth and circuit (S013) is simultaneously connected with the first input unit (S001) and the second input unit (S002), the second OR circuit (S014) is simultaneously connected with the first input unit (S001), the second input unit (S002), the first one-out switching circuit (S016), the fifth and circuit (S019), the second not circuit (S023) and the eighth and circuit (S028), the second circuit (S021) is simultaneously connected with the fifth input unit (S005), the sixth input unit (S006) and the third not circuit (S030), the first larger circuit (S022) is connected with the delay circuit (S024), the second not circuit (S023) is connected with the seventh AND circuit (S027), the seventh AND circuit (S027) is connected with the second larger circuit (S025) and the third OR circuit (S029) at the same time, the delay circuit (S024) is connected with the ninth AND circuit (S032), the third larger circuit (S026) is connected with the eighth AND circuit (S028), the eighth AND circuit (S028) is connected with the third OR circuit (S029), the third OR circuit (S029) is connected with the fourth not circuit (S031) and the fourth output unit at the same time, and the ninth AND circuit (S032) is connected with the third not circuit (S030), the fourth not circuit (S031) and the third output unit at the same time.

In some embodiments, the reductant dosing pump fault pre-warning device 11 is further configured to: and judging whether a first condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period and a first preset speed, and if so, outputting a first abnormal signal by a first output unit.

Specifically, the process of generating the first abnormal signal specifically includes:

the first input unit (S001) and the second input unit (S002) are simultaneously connected with the input end of the first and circuit (S007), the first input unit (S001) is used for acquiring a first reducing agent metering pump operation switching value signal, the second input unit (S002) is used for acquiring a second reducing agent metering pump operation switching value signal, when the first reducing agent metering pump operation switching value signal and the second reducing agent metering pump operation switching value signal are 1, the first and circuit (S007) outputs the switching value signal of 1, otherwise, the first and circuit (S007) outputs the switching value signal of 0;

the third input unit (S003) and the fourth input unit (S004) are simultaneously connected with the input end of the first subtraction circuit (S012), the output end of the first subtraction circuit (S012) is connected with the input end of the first absolute value circuit (S015), and the output end of the first absolute value circuit (S015) is connected with the input end of the first less than circuit (S018); taking 10min as an example in a first preset time period, acquiring a reducing agent solution tank liquid level analog quantity signal through a third input unit (S003), acquiring a reducing agent solution tank liquid level analog quantity signal before 10min through a fourth input unit (S004), and indicating the fluctuation change of the reducing agent solution tank liquid level within 10min through an output end of a first absolute value circuit (S015);

the first input unit (S001) and the second input unit (S002) are simultaneously connected with the input end of the second OR circuit (S014), when any one of the first reducing agent metering pump operation switching value signal and the second reducing agent metering pump operation switching value signal at the input end of the second OR circuit (S014) is 1, the output switching value signal is 1, and when the input end switching value signals are both 0, the output switching value signal is 0; an output end of the second or circuit (S014) is connected to an EN enable end of the first one-of-two switching circuit (S016), two input ends of the first one-of-two switching circuit (S016) obtain a first preset rate (obtained from the input end 1) and a second preset rate (obtained from the input end 2), the first preset rate is 1.5mm/min and the second preset rate is 1.2mm/min for example, when a signal of the EN enable End (EN) of the first one-of-two switching circuit (S016) is 1, the output end is the first preset rate of the input end 1 of 1.5mm/min, and when the signal of the EN enable end 016 of the first one-of-two switching circuit (S) is 0, the output end is the second preset rate of the input end 2 of 1.2 mm/min;

the output end of the first one-out-of-two switching circuit (S016) is connected with the input end 1 of the second one-out-of-two switching circuit (S017), the input end 2 of the second one-out-of-two switching circuit (S017) obtains a second preset rate, and the output end of the second OR circuit (S014), the output end of the first one-out-of-two switching circuit (S018) and the input end of the fifth AND circuit (S019) are connected;

the first input unit (S001) and the second input unit (S002) are simultaneously connected with the input end of a fourth and circuit (S013), the output end of the fourth and circuit (S013) is connected with the enable End (EN) of the second alternative switching circuit (S017), when the enable End (EN) of the second alternative switching circuit (S017) is 1, the output end is the output of the first alternative switching circuit (S016), and when the EN enable end of the second alternative switching circuit (S017) is 0, the output end is the second preset rate of 1.2mm/min of the input end 2;

the output end of the first absolute value circuit (S015) and the output end of the second alternative switching circuit (S017) are simultaneously connected with the input end of a first smaller than circuit (S018), the first smaller than circuit (S018) shows that the fluctuation change value of the liquid level of the reducing agent solution tank in 10min is smaller than the set change value of the liquid level of the reducing agent solution tank, if yes (namely the fluctuation change value of the liquid level of the reducing agent solution tank in 10min is smaller than the set change value of the liquid level of the reducing agent solution tank), a switching value signal is output to be 1, otherwise, 0 is output;

the output end of the first AND circuit (S007), the output end of the fifth AND circuit (S019) and the input end of the third AND circuit (S011) are connected, and the output end of the third AND circuit (S011) and the first output unit (S033) are connected;

if the output end of the third and circuit (S011) is 1, it indicates that the first condition is satisfied, the first condition is that the first reduction metering pump and the second reduction metering pump both operate, and the change rate of the liquid level of the reducing agent solution tank (i.e., the fluctuation change value of the liquid level of the reducing agent solution tank within 10 min) is less than 1.5 mm/min. When the first condition is met, the first output unit (S033) outputs a first abnormal signal with the numerical value of 1, at the moment, the reducing agent dosing pump fault early warning device 11 pushes 'please check whether the liquid level meter is normal, if the liquid level meter is normal, the two metering pumps output insufficient power, and please overhaul the current two operating metering pumps'.

In some embodiments, the reductant dosing pump malfunction alerting device 11 is further configured to: and judging whether a second condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period and a second preset speed, and if so, outputting a second abnormal signal by a second output unit.

Specifically, the process of generating the second abnormal signal specifically includes:

the first input unit (S001) and the second input unit (S002) are simultaneously connected with the input end of the first OR circuit (S008), when any one of a first reducing agent metering pump operation switching value signal and a second reducing agent metering pump operation switching value signal at the input end of the first OR circuit (S008) is 1, the output switching value signal is 1, and when the input end switching value signal is 0, the output switching value signal is 0; the output end of the first AND circuit (S007) is connected with the input end of the first NOT circuit (S009), the output end of the first OR circuit (S008) and the input end of the second AND circuit (S010) are connected, when the output end of the first OR circuit (S008) and the output end of the first NOT circuit (S009) are both 1, the output of the second AND circuit (S010) is 1, otherwise, the output is 0;

the output end of the second AND circuit (S010), the output end of the fifth AND circuit (S019) and the input end of the sixth AND circuit (S020), the output end of the sixth AND circuit (S020) and the second output unit (S034) are connected;

if the output end of the sixth and circuit (S020) is 1, it indicates that the second condition is satisfied, where the second condition is that the first reducing metering pump or the second reducing metering pump operates, and the rate of change of the liquid level of the reducing agent solution tank is less than 1.2 mm/min. When the second condition is met, the second output unit (S034) outputs a second abnormal signal with a numerical value of 1, and at the moment, the reducing agent dosing pump fault early warning device 11 pushes 'please check whether the liquid level meter is normal, if so, the output of the metering pump is insufficient, and please start the standby pump and overhaul the currently running metering pump'.

In some embodiments, the reductant dosing pump fault pre-warning device 11 is further configured to: and judging whether a third condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period, the reverse osmosis inlet main pipe conductance analog quantity signal before the second preset time period and the preset rising rate, and if so, outputting a third abnormal signal by a third output unit.

Specifically, the process of generating the third anomaly signal specifically includes:

the output end of the fifth AND circuit (S019) is connected with the input end of the third NOT circuit (S030), and the output end of the fifth AND circuit (S019) is used as one of judgment conditions for the abnormal operation early warning of the third reverse osmosis dosing system when the fifth AND circuit (S019) does not meet the requirements (namely the output of the fifth AND circuit (S019) is 0);

the fifth input unit (S005) and the sixth input unit (S006) are simultaneously connected with the input end of the second subtraction circuit (S021), the second preset time period is 10min as an example, the fifth input unit (S005) is used for collecting a reverse osmosis inlet main pipe conductance analog quantity signal, the sixth input unit (S006) is used for collecting an analog quantity signal before 10min of the reverse osmosis inlet main pipe conductance, and the output end of the second subtraction circuit (S021) represents the fluctuation change of the reverse osmosis inlet main pipe conductance within 10 min;

the input end 1 of the first larger-than circuit (S022) obtains a preset rising rate, the preset rising rate can be 20MV/min for example, the output end of the second subtraction circuit (S021) is connected with the input end 2 of the first larger-than circuit (S022), the fluctuation value of the reverse osmosis inlet main pipe conductance within 10min is compared with the preset rising rate 20MV/min in a large selection mode, if the fluctuation value of the reverse osmosis inlet main pipe conductance within 10min is larger than the preset rising rate 20MV/min, a switching value signal 1 is output, otherwise, 0 is output;

an input end 1 of the time delay circuit (S024) obtains a preset duration which can be 5S for example, and an output end of a first larger-ratio circuit (S022) is connected with an input end 2 of the time delay circuit (S024) and represents that the reverse osmosis inlet main pipe conductance has a fluctuation value within 10min which is more than 20MV/min and lasts for 5S;

the output end of the second OR circuit (S014) is connected with the input end of the second NOT circuit (S023); the input end 1 of the second comparison greater circuit (S025) obtains a first preset fluctuation change value, the first preset fluctuation change value is 0.5mm/min for example, the output end of the first absolute value circuit (S015) is connected with the input end 2 of the second comparison greater circuit (S025) to indicate that the fluctuation change value of the liquid level of the reducing agent solution tank within 10min and the first preset fluctuation change value are subjected to large selection comparison, if the fluctuation change value is established (namely the fluctuation change value of the liquid level of the reducing agent solution tank within 10min is greater than the first preset fluctuation change value by 0.5mm/min), a switching value signal 1 is output, otherwise, 0 is output;

the output end of the second NOT circuit (S023), the output end of the second comparison greater circuit (S025) and the input end of the seventh AND circuit (S027) are connected; a second preset fluctuation change value is obtained by an input end 1 of a third comparison larger circuit (S026), the second preset fluctuation change value is 3mm/min for example, an output end of a first absolute value circuit (S015) is connected with an input end 2 of the third comparison larger circuit (S026), the fluctuation change value of the liquid level of the reducing agent solution tank within 10min and the second preset fluctuation change value are subjected to large selection comparison, if yes (namely the fluctuation change value of the liquid level of the reducing agent solution tank within 10min is larger than the second preset fluctuation change value by 3mm/min), a switching value signal 1 is output, otherwise, 0 is output;

an output end of the second OR circuit (S014), an output end of the third comparison circuit (S026) and an input end of the eighth AND circuit (S028) are connected, an output end of the seventh AND circuit (S027), an output end of the eighth AND circuit (S028) and an input end of the third OR circuit (S029) are connected, and an output end of the third OR circuit (S029) and an input end of the fourth NOT circuit (S031) are connected;

the output end of the third NOT circuit (S030), the output end of the delay circuit (S024), the output end of the fourth NOT circuit (S031) and the input end of the ninth AND circuit (S032) are connected, and the output end of the ninth AND circuit (S032) and the third output unit (S035) are connected;

if the output end of the ninth and circuit (S032) is 1, it indicates that the third condition is satisfied, and the third condition is that the first reducing agent dosing pump fault early warning or the second reducing agent dosing pump fault early warning is not satisfied, the rising rate of the reverse osmosis inlet header ORP (oxidation reduction potential) is greater than 20MV/min and lasts for 5S, and the fourth reducing agent dosing pump fault early warning is not satisfied. When the third condition is met, the third output unit (S035) outputs a third anomaly signal having a numerical value of 1, and at this time, the reducing agent dosing pump failure early warning device 11 pushes "please check whether the ORP meter is normal, and if so, the amount of the reducing agent dosing needs to be increased".

In some embodiments, the reductant dosing pump fault pre-warning device 11 is further configured to: and judging whether the fourth condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period, a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period, a third preset speed and a fourth preset speed, and if so, outputting a fourth abnormal signal by a fourth output unit.

Specifically, the process of generating the fourth abnormal signal specifically includes:

the output end of the third OR circuit (S029) is connected with the fourth output unit (S036);

if the output end of the third or circuit (S029) is 1, it indicates that a fourth condition is satisfied, where neither the first reducing metering pump nor the second reducing metering pump is operated, the rate of change of the liquid level of the reducing agent solution tank is greater than the first preset fluctuation change value by 0.5mm/min, one or two reducing metering pumps are operated, and the rate of change of the liquid level of the reducing agent solution tank is greater than the second preset fluctuation change value by 3mm/min, and any one of the above conditions is satisfied as the fourth condition, and when the fourth condition is satisfied, the fourth output unit (S036) outputs a fourth abnormal signal whose value is 1, and at this time, the reducing agent dosing pump fault early warning device 11 pushes "please check whether the liquid level meter is normal, and if so, the reducing agent solution tank leaks".

In a second embodiment, fig. 4 shows a second reverse osmosis dosing system abnormal operation early warning system provided in the embodiment of the present disclosure, and as shown in fig. 4, the reverse osmosis dosing system abnormal operation early warning system 10 further includes a scale inhibitor dosing pump fault early warning device 12. The scale inhibitor dosing pump fault early warning device 12 can be used for obtaining a second signal group and judging whether the reverse osmosis dosing system has a second group of abnormal operation or not based on the second signal group, wherein the second signal group comprises a scale inhibitor solution tank liquid level analog quantity signal, a scale inhibitor solution tank liquid level analog quantity signal before a third preset time period and a plurality of scale inhibitor metering pump operation switching value signals.

Fig. 5 shows a block diagram of a fault early warning device of a scale inhibitor dosing pump provided by the embodiment of the disclosure.

In this embodiment, as shown in fig. 5, the scale inhibitor dosing pump fault early warning device 12 includes a second input module 121, a second determination module 122, and a second output module 123, which are connected in sequence. The second input module 121 is used for acquiring a second signal group. The second judging module 122 is configured to process the acquired second signal set to judge whether the reverse osmosis dosing system has a second set of abnormal operation. The second output module 123 is configured to output a second set of operational anomalies.

In this embodiment, the second input module 121 includes an input unit corresponding to each signal in the second signal group, that is, the second input module 121 includes a plurality of input units, each of which acquires one signal in the first signal group. Each input element may be represented by the symbol DI or AI.

In the present embodiment, the second determination module 122 includes an absolute value circuit (ABS), a plurality of alternative switching circuits (T), an addition circuit (SUM), a subtraction circuit (SUB), a function combination circuit (f (x)), a plurality of comparison greater circuits (GT), a comparison smaller circuit (LT), a comparison equal circuit (EQ), a plurality of AND circuits (AND) AND OR circuits (OR).

In this embodiment, the second group of abnormal operations includes a plurality of abnormal operating conditions, and the second output module 123 includes output units corresponding to the various abnormal operating conditions. That is, the second output module 123 includes a plurality of output units each outputting an abnormal operation condition. Each output cell may be represented by the symbol DO.

Fig. 6 shows a circuit diagram of a scale inhibitor dosing pump fault early warning device provided in an embodiment of the disclosure.

In some embodiments, the operation switching value signals of the multiple antisludging agent metering pumps are six, as shown in figure 6, the second input module 121 includes a seventh input unit (S037) for acquiring an analog quantity signal of the liquid level of the scale inhibitor solution tank, an eighth input unit (S038) for acquiring an analog quantity signal of the liquid level of the scale inhibitor solution tank before a third preset time period, a ninth input unit (S039) for acquiring an operation switching quantity signal of the first scale inhibitor metering pump, a tenth input unit (S040) for acquiring an operation switching quantity signal of the second scale inhibitor metering pump, an eleventh input unit (S041) for acquiring an operation switching quantity signal of the third scale inhibitor metering pump, a twelfth input unit (S042) for acquiring an operation switching quantity signal of the fourth scale inhibitor metering pump, a thirteenth input unit (S043) for acquiring an operation switching quantity signal of the fifth scale inhibitor metering pump, and a fourteenth input unit (S044) for acquiring an operation switching quantity signal of the sixth scale inhibitor metering pump.

As shown in fig. 3, the second determination module includes a second absolute value circuit (S046), a third alternative switching circuit (S048), a fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), an addition circuit (S054), a third subtraction circuit (S045), a function combination circuit (S055), a fourth comparison greater circuit (S056), a fifth comparison greater circuit (S058), a sixth comparison greater circuit (S059), a second comparison greater circuit (S047), a comparison equal circuit (S057), a tenth comparison circuit (S060), an eleventh comparison circuit (S061), a twelfth comparison circuit (S062), and a fourth comparison circuit (S063).

The input value of an input end 1 of each of the third alternative switching circuit (S048), the fourth alternative switching circuit (S049), the fifth alternative switching circuit (S050), the sixth alternative switching circuit (S051), the seventh alternative switching circuit (S052) and the eighth alternative switching circuit (S053) is constantly 1, and the input value of an input end 2 of the alternative switching circuit is constantly 0. The input value of the input end 1 of the fourth comparison greater circuit (S056) is constantly 0, and the input value of the input end 1 of the comparison equal circuit (S057) is constantly 0; a fifth comparison is larger than one input end (namely the input end 1) of the circuit (S058) to obtain a third preset fluctuation value, and the third preset fluctuation value is 3mm/min for example; the sixth comparison is greater than the one input terminal (i.e., input terminal 1) of the circuit (S059)) to obtain a fourth preset fluctuation value, which is, for example, 0.5 mm/min.

As shown in fig. 3, there are two kinds of operation abnormality conditions among the second group of operation abnormalities, and the second output module includes a fifth output unit (S064) that outputs a fifth abnormality signal and a sixth output unit (S065) that outputs a sixth abnormality signal. The fifth abnormal signal indicates that the fifth reverse osmosis dosing system operates abnormally, and the sixth abnormal signal indicates that the sixth reverse osmosis dosing system operates abnormally.

As shown in fig. 3, the third subtraction circuit (S045) is connected to the seventh input unit (S037), the eighth input unit (S038), and the second absolute value circuit (S046) at the same time, the second absolute value circuit (S046) is connected to the second smaller comparison circuit (S047), the fifth larger comparison circuit (S058), and the sixth larger comparison circuit (S059) at the same time, the second smaller comparison circuit (S047) is connected to the function combination circuit (S055) and the twelfth and selection circuit (S062) at the same time, the third two-to-one switching circuit (S048), the fourth two-to-one switching circuit (S049), the fifth two-to-one switching circuit (S050), the sixth two-to-one switching circuit (S051), the seventh two-to-one switching circuit (S052), the eighth two-to-one switching circuit (S053) is connected to the ninth input unit (S039), the tenth input unit (S038), the eleventh input unit (S040), the twelfth input unit (S040), and the twelfth input unit (S042) respectively, A thirteenth input unit (S043) and a fourteenth input unit (S044), an addition circuit (S054) is simultaneously connected with a third alternative switching circuit (S048), a fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), a function combination circuit (S055), a fourth comparison greater circuit (S056) and a comparison equal circuit (S057), a fourth comparison greater circuit (S056) is simultaneously connected with a tenth comparison greater circuit (S060) and a twelfth comparison circuit (S062), a comparison equal circuit (S057) is connected with an eleventh comparison greater circuit (S061), the tenth comparison greater circuit (S060) is simultaneously connected with the fifth comparison greater circuit (S058) and the fourth or circuit (S063), the eleventh comparison greater circuit (S059) is simultaneously connected with the sixth comparison circuit (S059) or the fourth comparison greater than S059), the twelfth AND circuit (S062) is connected to the fifth output unit, and the fourth OR circuit (S063) is connected to the sixth output unit.

In some embodiments, the scale inhibitor dosing pump failure early warning device 12 is further configured to: and judging whether a fifth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, the first scale inhibitor metering pump operation switching quantity signal, the second scale inhibitor metering pump operation switching quantity signal, the third scale inhibitor metering pump operation switching quantity signal, the fourth scale inhibitor metering pump operation switching quantity signal, the fifth scale inhibitor metering pump operation switching quantity signal and the sixth scale inhibitor metering pump operation switching quantity signal, and if so, outputting a fifth abnormal signal by a fifth output unit.

Specifically, the process of generating the fifth abnormal signal specifically includes:

the seventh input unit (S037) and the eighth input unit (S038) are simultaneously connected with the input end of the third subtraction circuit (S045), a third preset time period takes 1min as an example, the seventh input unit (S037) is used for collecting scale inhibitor solution tank liquid level analog quantity signals, the eighth input unit (S038) is used for collecting analog quantity signals of the scale inhibitor solution tank liquid level before 1min, the output end of the third subtraction circuit (S045) is connected with the input end of the second absolute value circuit (S046), and the output end of the second absolute value circuit (S046) represents fluctuation change of the scale inhibitor solution tank liquid level within 1 min;

the ninth input unit (S039) is connected with the EN enabling end of the third alternative switching circuit (S048); acquiring a first scale inhibitor metering pump operation switching value signal through a ninth input unit (S039), wherein the first scale inhibitor metering pump operation switching value signal indicates that when the first scale inhibitor metering pump operation switching value signal is 1, the output of a third alternative switching circuit (S048) is 1, otherwise, the output of the third alternative switching circuit (S048) is 0;

the tenth input unit (S040) is connected with an EN enabling end of the fourth one-of-two switching circuit (S049), the second scale inhibitor metering pump operation switching value signal is obtained through the tenth input unit (S040), when the second scale inhibitor metering pump operation switching value signal is 1, the output of the fourth one-of-two switching circuit (S049) is 1, and otherwise, the output of the fourth one-of-two switching circuit (S049) is 0;

the eleventh input unit (S041) is connected with an EN enabling end of the fifth alternative switching circuit (S050), and the eleventh input unit (S041) is used for acquiring a third scale inhibitor metering pump operation switching value signal, wherein when the third scale inhibitor metering pump operation switching value signal is 1, the output of the fifth alternative switching circuit (S050) is 1, and otherwise, the output of the fifth alternative switching circuit (S050) is 0;

the twelfth input unit (S042) is connected with an EN enabling end of the sixth alternative switching circuit (S051), the twelfth input unit (S042) is used for acquiring a fourth scale inhibitor metering pump operation switching value signal, when the fourth scale inhibitor metering pump operation switching value signal is 1, the output of the sixth alternative switching circuit (S051) is 1, otherwise, the output of the sixth alternative switching circuit (S051) is 0;

the thirteenth input unit (S043) is connected with the EN enabling end of the seventh alternative switching circuit (S052), the fifth scale inhibitor metering pump operation switching value signal is obtained through the thirteenth input unit (S043), when the fifth scale inhibitor metering pump operation switching value signal is 1, the output of the seventh alternative switching circuit (S052) is 1, otherwise, the output of the seventh alternative switching circuit (S052) is 0;

a fourteenth input unit (S044) is connected to the EN enable end of the eighth alternative switching circuit (S053), and the fourteenth input unit (S044) obtains a sixth scale inhibitor metering pump operation switching value signal, which indicates that when the sixth scale inhibitor metering pump operation switching value signal is 1, the output of the eighth alternative switching circuit (S053) is 1, otherwise, the output of the eighth alternative switching circuit (S053) is 0;

the third alternative switching circuit (S048), the fourth alternative switching circuit (S049), the fifth alternative switching circuit (S050), the sixth alternative switching circuit (S051), the seventh alternative switching circuit (S052), the eighth alternative switching circuit (S053) and the addition circuit (S054) are connected to represent the total number of the current first, second, third, fourth, fifth and sixth scale inhibitor metering pumps in operation;

the output end of the addition circuit (S054) is connected with the input end of the function combination circuit (S055) and represents a fixed value ((0, 0), (1, 0.3), (2, 0.6), (3, 0.9), (4, 1.2), (5, 1.5), (6, 1.8)) of the liquid level change rate corresponding to the total number of the current operation of the antisludging agent metering pump; namely, when the output end of the addition circuit (S054) is 0, the output of the function combination circuit (S055) is 0 mm/min; when the output end of the addition circuit (S054) is 1, the output of the function combination circuit (S055) is 0.3 mm/min; when the output end of the addition circuit (S054) is 2, the output of the function combination circuit (S055) is 0.6 mm/min; when the output end of the addition circuit (S054) is 3, the output of the function combination circuit (S055) is 0.9 mm/min; when the output end of the addition circuit (S054) is 4, the output of the function combination circuit (S055) is 1.2 mm/min; when the output end of the addition circuit (S054) is 5, the output of the function combination circuit (S055) is 1.5 mm/min; when the output end of the addition circuit (S054) is 6, the output of the function combination circuit (S055) is 1.8 mm/min;

the output end of the second absolute value circuit (S046), the output end of the function combination circuit (S055) and the input end of the second smaller circuit (S047) are connected, which indicates that the liquid level change rate of the scale inhibitor solution tank is smaller than the liquid level change rate fixed value corresponding to the number of the currently-operated scale inhibitor metering pumps, the output switching value signal is 1, otherwise, the output switching value signal is 0;

the output end of the addition circuit (S054) is connected with the input end 2 of the fourth comparison greater circuit (S056);

the second is smaller than the output of the circuit (S047), the fourth is greater than the output of the circuit (S056) and twelfth and circuit (S062) input end link, the twelfth and circuit (S062) output end and fifth output unit (S064);

if the output end of the twelfth AND circuit (S062) is 1, the fifth condition is met, and if the liquid level change rate of the scale inhibitor solution tank is smaller than the liquid level change rate fixed value corresponding to the number of the currently operated scale inhibitor metering pumps, the fifth condition is that the liquid level change rate fixed value is larger than the liquid level change rate fixed value. When the fifth condition is met, the fifth output unit (S064) outputs a fifth abnormal signal with a numerical value of 1, and at this time, the scale inhibitor dosing pump fault early warning device 12 pushes "please check whether the liquid level meter is normal, and if so, the scale inhibitor dosing pump has insufficient output, please start the backup pump and overhaul the currently-operating scale inhibitor dosing pump".

In some embodiments, the scale inhibitor dosing pump fault early warning device 12 is further configured to: and judging whether a sixth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, a first scale inhibitor metering pump operation switching quantity signal, a second scale inhibitor metering pump operation switching quantity signal, a third scale inhibitor metering pump operation switching quantity signal, a fourth scale inhibitor metering pump operation switching quantity signal, a fifth scale inhibitor metering pump operation switching quantity signal, a sixth scale inhibitor metering pump operation switching quantity signal, a fifth preset speed and a sixth preset speed, and if so, outputting a sixth abnormal signal by a sixth output unit.

Specifically, the process of generating the sixth abnormal signal specifically includes:

the input end 1 of the fifth comparison greater circuit (S058) obtains a third preset fluctuation value, the third preset fluctuation value is 3mm/min for example, the output end of the second absolute value circuit (S046) is connected with the input end 2 of the fifth comparison greater circuit (S058), which shows that if the fluctuation value of the liquid level of the scale inhibitor solution tank within 1min is greater than the third preset fluctuation value by 3mm/min, the fifth comparison greater circuit (S058) outputs a switching value signal of 1, otherwise, the switching value signal is 0;

the output end of the fifth comparison greater circuit (S058), the output end of the fourth comparison greater circuit (S056) and the input end of the tenth and circuit (S060) are connected;

the input end 1 of the sixth comparison greater circuit (S059) obtains a fourth preset fluctuation value, the fourth preset fluctuation value is 0.5mm/min for example, the output end of the second absolute value circuit (S046) is connected with the input end 2 of the sixth comparison greater circuit (S059), which indicates that if the fluctuation value of the liquid level of the scale inhibitor solution tank within 1min is greater than the fourth preset fluctuation value by 0.5mm/min, the sixth comparison greater circuit (S059) outputs a switching value signal of 1, otherwise, the switching value signal is 0;

the output end of the addition circuit (S054) is connected with the input end 2 of the comparison and equaling circuit (S057), and when the total running amount of the current antisludging agent metering pump is equal to a fixed value 0, the output switching value signal is 1, otherwise, the output switching value signal is 0;

the output end of the sixth comparison greater than circuit (S059), the output end of the comparison equal circuit (S057) and the input end of the eleventh and circuit (S061) are connected;

an output terminal of the tenth and circuit (S060), an output terminal of the eleventh and circuit (S061) and an input terminal of the fourth or circuit (S063), an output terminal of the fourth or circuit (S063) and the sixth output unit (S065);

if the output end of the fourth or circuit (S063) is 1, it means that the sixth condition is satisfied, and the sixth condition is that when at least one scale inhibitor metering pump operates, the liquid level change rate of the scale inhibitor solution tank is greater than the third preset fluctuation change value by 3mm/min, or when none of the scale inhibitor metering pumps operate, the liquid level change rate of the scale inhibitor solution tank is greater than the fourth preset fluctuation change value by 0.5 mm/min. When the sixth condition is met, the sixth output unit (S065) outputs a sixth abnormal signal with a numerical value of 1, and at this time, the scale inhibitor dosing pump fault early warning device 12 pushes "please check whether the liquid level meter is normal, and if so, the scale inhibitor solution tank leaks".

The above-mentioned serial numbers of the embodiments of the present disclosure are merely for description and do not represent the merits of the embodiments.

The reverse osmosis dosing system unusual operation early warning system of this disclosure, including reductant dosing pump trouble early warning device, it is used for first signal group to judge whether the reverse osmosis dosing system appears first group operation unusual based on first signal group, first signal group includes multiple reductant measuring pump operation switching value signal, reductant solution tank liquid level analog quantity signal, the reducing agent solution tank liquid level analog quantity signal before the first predetermined time quantum, the female pipe conductance analog quantity signal of reverse osmosis import before the second predetermined time quantum. Under the condition, corresponding treatment is carried out by timely obtaining a plurality of reducing agent metering pump operation switching value signals, reducing agent solution tank liquid level analog quantity signals before a first preset time period, reverse osmosis inlet main pipe conductance analog quantity signals and reverse osmosis inlet main pipe conductance analog quantity signals before a second preset time period, when a reducing agent dosing pump in a reverse osmosis dosing system has a problem, carry out reasonable analysis and judgment to various abnormal operation operating condition of reverse osmosis reductant charge system, finally make correct early warning suggestion and accurate processing guidance suggestion, in time output ground early warning information, solved prior art and can't give the more audio-visual early warning information of operating personnel when charge system goes wrong, more can't in time make corresponding processing when charge system goes wrong, guarantee reverse osmosis unit's operation safety's problem. In addition, the reverse osmosis dosing system operation abnormity early warning system further comprises a scale inhibitor dosing pump fault early warning device, wherein the scale inhibitor dosing pump fault early warning device acquires a scale inhibitor solution tank liquid level analog quantity signal, a scale inhibitor solution tank liquid level analog quantity signal before a third preset time period and a plurality of scale inhibitor metering pump operation switching quantity signals, processes and analyzes the signals to reasonably analyze and judge various abnormal operation conditions of the reverse osmosis scale inhibitor dosing system, finally makes a correct early warning prompt and an accurate processing guidance suggestion, and outputs intuitive early warning information in time. When the reverse osmosis dosing system operation abnormity early warning system is in specific operation, the liquid level of a reducing agent solution tank, the liquid level of a scale inhibitor solution tank, the operation state and the quantity of a reducing agent metering pump, the operation state of the scale inhibitor dosing pump and the ORP of a reverse osmosis inlet main pipe of the reverse osmosis dosing system are monitored in real time in a circuit simulation mode, the abnormal state problem occurring in the operation of the reverse osmosis dosing system is distinguished by utilizing various judgment conditions, and the judgment conditions comprise that the output of a second subtraction circuit is compared with a fixed value of 20 through a first comparison circuit; the output of the first absolute value circuit is compared with a circuit constant value of 0.5 through a second comparison; the output of the first absolute value circuit is compared with a fixed value 3 through a third comparison larger circuit; the delay time of the delay circuit is 5 s; the fixed value of the input end 1 of the first or second alternative switching circuit is 1.5, and the fixed value of the input end 2 is 1.2; the constant value of the input end 2 of the second alternative switching circuit is 1.2; the output of the adder circuit is compared with a fixed value through a function combination circuit; the output of the adder circuit is compared with a fixed value 0 through a fourth comparison larger circuit; the output of the adder circuit is compared with a constant value 0 through a comparison and equaling circuit; the output of the second absolute value circuit is compared with a fixed value 3 through a fifth comparison larger circuit; the output of the second absolute value circuit is compared with a fixed value of 0.5 through a sixth comparison larger circuit; after the early warning is judged so that the operating personnel can timely get rid of the abnormal problem of the dosing system through the early warning information pushed by the system, the safe and stable operation of the reverse osmosis device is ensured, and meanwhile, the probability that the reverse osmosis membrane is damaged due to the abnormal operation of the dosing system is also reduced.

There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, and the present disclosure is not limited thereto as long as the desired results of the technical solutions of the present disclosure can be achieved.

The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. The utility model provides a reverse osmosis medicine system abnormal operation early warning system which characterized in that includes:

reducing agent dosing pump trouble early warning device for acquire first signal group, and based on first signal group judges whether reverse osmosis dosing system appears first group operation unusual, first signal group includes multiple reducing agent measuring pump operation switching value signal, reducing agent solution case liquid level analog quantity signal, the reducing agent solution case liquid level analog quantity signal before the first predetermined time quantum, the female pipe conductance analog quantity signal of reverse osmosis import before the second predetermined time quantum.

2. The reverse osmosis dosing system abnormal operation early warning system of claim 1, wherein the reverse osmosis dosing system abnormal operation early warning system further comprises:

and the scale inhibitor dosing pump fault early warning device is used for acquiring a second signal group and judging whether the reverse osmosis dosing system has a second group abnormal operation or not based on the second signal group, wherein the second signal group comprises a scale inhibitor solution tank liquid level analog signal, a scale inhibitor solution tank liquid level analog signal before a third preset time period and a plurality of scale inhibitor metering pump operation switching value signals.

3. The reverse osmosis dosing system abnormal operation early warning system of claim 1, wherein the reducing agent dosing pump fault early warning device comprises:

the first input module, the first judging module and the first output module are connected in sequence;

the first input module comprises input units corresponding to signals in the first signal group, the first judgment module comprises a plurality of AND circuits, a plurality of OR circuits, a plurality of NOT circuits, a plurality of subtraction circuits, an absolute value circuit, a plurality of alternative switching circuits, a smaller circuit, a plurality of comparison larger circuits and a delay circuit, the first group of abnormal operation conditions comprises a plurality of abnormal operation conditions, and the first output module comprises output units corresponding to the various abnormal operation conditions.

4. The system of claim 3, wherein the first input module, the first determination module and the first output module comprise:

the first input module comprises a first input unit for acquiring the operation switching value signal of the first reducing agent metering pump, a second input unit for acquiring the operation switching value signal of the second reducing agent metering pump, a third input unit for acquiring a liquid level analog quantity signal of a reducing agent solution tank, a fourth input unit for acquiring a liquid level analog quantity signal of the reducing agent solution tank before a first preset time period, a fifth input unit for acquiring a reverse osmosis inlet main pipe conductance analog quantity signal, and a sixth input unit for acquiring a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period;

the first judgment module comprises a first AND circuit (S007), a second AND circuit (S010), a third AND circuit (S011), a fourth AND circuit (S013), a fifth AND circuit (S019), a sixth AND circuit (S020), a seventh AND circuit (S027), an eighth AND circuit (S028), a ninth AND circuit (S032), a first OR circuit (S008), a second OR circuit (S014), a third OR circuit (S029) and a first NOT circuit (S009), the circuit comprises a second NOT circuit (S023), a third NOT circuit (S030), a fourth NOT circuit (S031), a first subtraction circuit (S012), a second subtraction circuit (S021), a first absolute value circuit (S015), a first alternative switching circuit (S016), a second alternative switching circuit (S017), a first smaller ratio circuit (S018), a first larger ratio circuit (S022), a second larger ratio circuit (S025), a third larger ratio circuit (S026) and a delay circuit (S024);

the first output module comprises a first output unit, a second output unit, a third output unit and a fourth output unit.

5. The reverse osmosis dosing system abnormal operation early warning system of claim 4, further comprising:

the first and circuit (S007) is connected with the first input unit, the second input unit, the first NOT circuit (S009) and the third and circuit (S011) at the same time, the first OR circuit (S008) is connected with the first input unit, the second input unit and the second and circuit (S010) at the same time, the second and circuit (S010) is connected with the first NOT circuit (S009) and the sixth AND circuit (S020) at the same time, the first subtraction circuit (S012) is connected with the third input unit, the fourth input unit and the first absolute value circuit (S015) at the same time, the first absolute value circuit (S015) is connected with the first selected switching circuit (S017) and the fifth and circuit (S019) at the same time, the fifth and circuit (S019) are connected with the second selected switching circuit (S017) and the third and circuit (S026) at the same time, the fifth and circuit (S019) are connected with the third and circuit (S011) at the same time, the first AND circuit (S011), A sixth AND circuit (S020) and a third NOT circuit (S030), a third AND circuit (S011) is connected with the first output unit, the sixth AND circuit (S020) is connected with the second output unit, a second alternative switching circuit (S017) is simultaneously connected with a fourth AND circuit (S013) and a first alternative switching circuit (S016), a fourth AND circuit (S013) is simultaneously connected with the first input unit and the second input unit, a second OR circuit (S014) is simultaneously connected with the first input unit, the second input unit, the first alternative switching circuit (S016), a fifth AND circuit (S019), the second NOT circuit (S023) and an eighth AND circuit (S028), a second subtractor circuit (S021) is simultaneously connected with the fifth input unit, the sixth input unit and the first greater than circuit (S023), a first greater than circuit (S022) is connected with the circuit (S022), and a seventh delay circuit (S027) is connected with the circuit (S023), the seventh and circuit (S027) is connected with the second comparison greater circuit (S025) and the third OR circuit (S029) at the same time, the delay circuit (S024) is connected with the ninth and circuit (S032), the third comparison greater circuit (S026) is connected with the eighth and circuit (S028), the eighth and circuit (S028) is connected with the third OR circuit (S029), the third OR circuit (S029) is connected with the fourth NOT circuit (S031) and the fourth output unit at the same time, and the ninth and circuit (S032) is connected with the third NOT circuit (S030), the fourth NOT circuit (S031) and the third output unit at the same time.

6. The reverse osmosis dosing system abnormal operation early warning system of claim 5, wherein the reducing agent dosing pump fault early warning device is further configured to:

judging whether a first condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period and a first preset speed, and if so, outputting a first abnormal signal by a first output unit;

judging whether a second condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period and a second preset speed, if so, outputting a second abnormal signal by a second output unit, and the second preset speed is smaller than the first preset speed;

judging whether a third condition is met or not based on a first reducing agent metering pump operation switching value signal, a second reducing agent metering pump operation switching value signal, a reducing agent solution tank liquid level analog quantity signal before a first preset time period, a reverse osmosis inlet main pipe conductance analog quantity signal before a second preset time period and a preset rising rate, and if so, outputting a third abnormal signal by a third output unit;

and judging whether the fourth condition is met or not based on the first reducing agent metering pump operation switching value signal, the second reducing agent metering pump operation switching value signal, the reducing agent solution tank liquid level analog quantity signal before the first preset time period, the reverse osmosis inlet main pipe conductance analog quantity signal before the second preset time period, the third preset speed and the fourth preset speed, and if so, outputting a fourth abnormal signal by a fourth output unit.

7. The reverse osmosis dosing system abnormal operation early warning system of claim 2, wherein the antisludging agent dosing pump fault early warning device comprises:

the second input module, the second judgment module and the second output module are connected in sequence;

the second input module comprises input units corresponding to signals in the second signal group, the second judgment module comprises an absolute value circuit, a plurality of alternative switching circuits, an adding circuit, a subtracting circuit, a function combination circuit, a plurality of comparison larger circuits, a comparison smaller circuit, a comparison equal circuit, a plurality of AND circuits and/or circuits, the second group of abnormal operation conditions comprises a plurality of abnormal operation conditions, and the second output module comprises output units corresponding to the various abnormal operation conditions.

8. The reverse osmosis dosing system abnormal operation early warning system of claim 7, wherein the second input module, the second judgment module and the second output module comprise:

the second input module comprises a seventh input unit for acquiring a scale inhibitor solution tank liquid level analog quantity signal, an eighth input unit for acquiring a scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, a ninth input unit for acquiring a first scale inhibitor metering pump operation switching quantity signal, a tenth input unit for acquiring a second scale inhibitor metering pump operation switching quantity signal, an eleventh input unit for acquiring a third scale inhibitor metering pump operation switching quantity signal, a twelfth input unit for acquiring a fourth scale inhibitor metering pump operation switching quantity signal, a thirteenth input unit for acquiring a fifth scale inhibitor metering pump operation switching quantity signal and a fourteenth input unit for acquiring a sixth scale inhibitor metering pump operation switching quantity signal;

the second judgment module comprises a second absolute value circuit (S046), a third alternative switching circuit (S048), a fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), an addition circuit (S054), a third subtraction circuit (S045), a function combination circuit (S055), a fourth comparison larger circuit (S056), a fifth comparison larger circuit (S058), a sixth comparison larger circuit (S059), a second comparison smaller circuit (S047), a comparison equal circuit (S057), a tenth comparison circuit (S060), an eleventh comparison circuit (S061), a twelfth comparison circuit (S062) and a fourth or circuit (S063);

the second output module comprises a fifth output unit and a sixth output unit.

9. The reverse osmosis dosing system abnormal operation early warning system of claim 8, further comprising:

the third subtraction circuit (S045) is connected with the seventh input unit, the eighth input unit and the second absolute value circuit (S046) at the same time, the second absolute value circuit (S046) is connected with the second smaller sub-circuit (S047), the fifth greater comparison circuit (S058) and the sixth greater comparison circuit (S059) at the same time, the second smaller sub-circuit (S047) is connected with the function combination circuit (S055) and the twelfth and circuit (S062) at the same time, the third alternative switching circuit (S048), the fourth alternative switching circuit (S049), the fifth alternative switching circuit (S050), the sixth alternative switching circuit (S051), the seventh alternative switching circuit (S052), the eighth alternative switching circuit (S053) is connected with the ninth input unit, the tenth input unit, the eleventh input unit, the twelfth input unit, the thirteenth input unit and the fourteenth input unit, and the fourteenth input unit (S054) at the same time, and the third alternative switching circuit (S058) is connected with the ninth input unit (S058) at the tenth input unit and the fourth alternative switching circuit (S059) at the fourth input unit at the same time, A fourth alternative switching circuit (S049), a fifth alternative switching circuit (S050), a sixth alternative switching circuit (S051), a seventh alternative switching circuit (S052), an eighth alternative switching circuit (S053), a function combination circuit (S055), a fourth comparison greater circuit (S056) and a comparison equal circuit (S057) are connected, the fourth comparison circuit (S056) is connected to the tenth and twelfth and circuits (S060, S062) at the same time, the comparison circuit (S057) is connected to the eleventh and circuit (S061), the tenth and circuit (S060) is connected to the fifth comparison circuit (S058) and the fourth or circuit (S063) at the same time, the eleventh and circuit (S061) is connected to the sixth comparison circuit (S059) and the fourth or circuit (S063) at the same time, the twelfth and circuit (S062) is connected to the fifth output unit, and the fourth or circuit (S063) is connected to the sixth output unit.

10. The reverse osmosis dosing system abnormal operation early warning system of claim 9, wherein the scale inhibitor dosing pump fault early warning device is further configured to:

judging whether a fifth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, the first scale inhibitor metering pump operation switching quantity signal, the second scale inhibitor metering pump operation switching quantity signal, the third scale inhibitor metering pump operation switching quantity signal, the fourth scale inhibitor metering pump operation switching quantity signal, the fifth scale inhibitor metering pump operation switching quantity signal and the sixth scale inhibitor metering pump operation switching quantity signal, and if so, outputting a fifth abnormal signal by a fifth output unit;

and judging whether a sixth condition is met or not based on the scale inhibitor solution tank liquid level analog quantity signal before a third preset time period, the scale inhibitor solution tank liquid level analog quantity signal before the third preset time period, a first scale inhibitor metering pump operation switching quantity signal, a second scale inhibitor metering pump operation switching quantity signal, a third scale inhibitor metering pump operation switching quantity signal, a fourth scale inhibitor metering pump operation switching quantity signal, a fifth scale inhibitor metering pump operation switching quantity signal, a sixth scale inhibitor metering pump operation switching quantity signal, a fifth preset speed and a sixth preset speed, and if so, outputting a sixth abnormal signal by a sixth output unit.