CN109696897A - A kind of multiple spot lifting body loading testing method and its detection device - Google Patents
A kind of multiple spot lifting body loading testing method and its detection device Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4188—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by CIM planning or realisation
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a kind of multiple spot lifting body loading testing methods, the load value including obtaining each jacking unit；According to the load value of each jacking unit, the loaded-up condition of multiple spot lifting body is judged；If judge the loaded-up condition for unloaded lotus or static load, sampled value is calculated using the way of median average filter；If judge the loaded-up condition for dynamic load, sampled value is calculated using clipping average filter method；Judge whether the sampled value is greater than load preset value, if so, issuing alarm.Thus the present invention carrys out the data processing to unloaded lotus, static load, dynamic load overall process by the load value got.Static load and dynamic load monitoring protection control are realized, realizes alert process.It can be widely used for the detection of multiple spot lifting body load.
Description
Technical field
The present invention relates to jacking detection field more particularly to a kind of multiple spot lifting body loading testing method and its detection dresses
It sets.
Background technique
Lifting body is often used in construction, is used to jack up construction material or construction equipment.
In practice of construction, multiple lifting bodies are generally used, while being jacked, be needed not during jacking
The load that the disconnected each jacking unit of detection is born.In the prior art, in prior art application, only simply by sensor
Detected value is exported in the form of analog signals, and all controls for sensor and data processing require later period control
Device processed is handled with computer.
Summary of the invention
In order to solve the above technical problems, load can be detected at any time the purpose of the present invention is to provide one kind and can be to inspection
It surveys.
The first aspect of the embodiment of the present invention provides a kind of multiple spot lifting body loading testing method, comprising:
Obtain the load value of each jacking unit；
According to the load value of each jacking unit, the loaded-up condition of multiple spot lifting body is judged；
If judge the loaded-up condition for unloaded lotus or static load, sampling is calculated using the way of median average filter
Value；
If judge the loaded-up condition for dynamic load, sampled value is calculated using clipping average filter method；
Judge whether the sampled value is greater than load preset value, if so, issuing alarm.
In a kind of possible embodiment, the way of median average filter calculates sampled value and includes:
Multiple load values are continuously acquired, and remove maximum value and minimum value, surplus load Value Data is subjected to arithmetic average fortune
It calculates.
It is described to include: using clipping average filter method calculating sampled value in a kind of possible embodiment
Obtain the locomotion speed value, acceleration value and theoretical dynamic load value of each jacking unit；
Amplitude limiting processing is carried out to the load value；
Sampled value queue is passed to amplitude limiting processing treated load value and carries out recurrence average filtering processing.
In a kind of possible embodiment, the load value carries out amplitude limiting processing and includes:
It takes 2-3 times of theoretical dynamic load value to be used as amplitude limit value, will be greater than the load value removal of amplitude limit value.
Preferably, the incoming sampled value queue progress recurrence average, which is filtered, includes:
Amplitude limiting processing treated load value is passed to the tail of the queue of sampled value queue；
Remove amplitude limiting processing treated the load value of the head of the queue of sampled value queue；
Amplitude limiting processing in queue treated load value is subjected to arithmetic average operation.
Preferably, the multiple spot lifting body loading testing method further include:
If judge the loaded-up condition for unloaded lotus, mark zero is carried out to accessed load value.
In a kind of possible embodiment, the multiple spot lifting body loading testing method further includes automatic replacement distortion letter
Number step:
When the load value of any jacking unit occurs abnormal, the abnormal load value is shielded, and jack its on unit with same
The average value of his load value substitutes.
In a kind of possible embodiment, the multiple spot lifting body loading testing method further include:
The position of centre of gravity of computational load；
Judge whether position of centre of gravity deviates center of gravity predeterminated position, if so, issuing alarm.
In a kind of possible embodiment, the multiple spot lifting body loading testing method further include:
Obtain the practical dynamic load value change curve of jacking unit；
Judge whether practical dynamic load value change curve is greater than curve preset value, if so, issuing alarm.
Thus the present invention comes to unloaded lotus, static load, dynamic load overall process by the load value got
Data processing.Static load and dynamic load monitoring protection control are realized, realizes alert process.
The present invention calculates sampled value, wave caused by capable of effectively overcoming because of accidental factor by using the way of median average filter
Dynamic interference, load value fluctuation up and down in a certain numberical range, has good filter effect to slow measured parameter.
Sampled value is calculated by using clipping average filter method, uses different filtering methods according to different loads, not only
The disturbance and interference effectively removed in signal improves the reliability of signal, and control system memory is greatly saved.
The second aspect of the present invention provides a kind of multiple spot lifting body load detecting device, equally has above-mentioned beneficial to effect
Fruit, the multiple spot lifting body load detecting device include:
Multiple load detection units, are set on the jacking unit of multiple spot lifting body, jack what unit was born for detecting
Load value；
Multiple signal conditioners are connect correspondingly with the load detection unit, are used for each jacking unit mark zero correction；
Processor connects the signal conditioner, for handling data and instruction.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of module map of embodiment of the present invention；
Fig. 2 is a kind of flow chart of embodiment of the present invention.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing to the present invention into
Row detailed description, the description of this part be only it is exemplary and explanatory, should not have any limitation to protection scope of the present invention
Effect.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It should be noted that term " center ", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outside" etc.
The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the invention product use when it is usual
The orientation or positional relationship put, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion meaning
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to of the invention
Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply opposite
Importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
As shown in Fig. 2, the technical solution that embodiment of the present invention provides is as follows, a kind of multiple spot lifting body load detection side
Method comprising following steps:
Step S100: the load value of each jacking unit is obtained；
Step S200: according to the load value of each jacking unit, judge the loaded-up condition of multiple spot lifting body；
Step S300: if judge the loaded-up condition for unloaded lotus or static load, the way of median average filter is used
Calculate sampled value；
Step S400: if judge the loaded-up condition for dynamic load, sampled value is calculated using clipping average filter method；
Step S500: judge whether the sampled value is greater than load preset value;
Step S600: if so, issuing alarm.
Wherein, step S300 and step S400 belong to side by side, or can will not influence holding for subsequent step with reversed order
It goes, sampled value described in step S500, is the sampled value of both step S300 and step S400.Load preset value is to be arranged in advance
Good value.Illustrate the working principle and the course of work of present embodiment below with reference to Fig. 1.Wherein, multiple spot lifting body has more
A jacking unit, and multiple load detection units 1 can be set on each jacking unit, for obtaining the load of jacking unit
Value, load detection unit 1 are connect with signal conditioner 2, and signal conditioner 2 passes through I/O connection processor 3.
Wherein, in step S300, if judge the loaded-up condition for unloaded lotus or static load, the median
Average filter method, which calculates sampled value, to use following steps:
Multiple load values are continuously acquired, and remove maximum value and minimum value, surplus load Value Data is subjected to arithmetic average fortune
It calculates.
Specifically, continuously acquiring multiple load values, it can be and obtain 3-14, caused by capable of effectively overcoming because of accidental factor
Fluctuation interference, load value fluctuation up and down in a certain numberical range, has good filter effect to slow measured parameter, but right
Fast varying parameters are insensitive.
Wherein, described average using clipping if judge the loaded-up condition for dynamic load in step step S400
Filter method, which calculates sampled value, can specifically include following steps:
(1), the locomotion speed value, acceleration value and theoretical dynamic load value of each jacking unit are obtained；
(2), amplitude limiting processing is carried out to the load value；
(3), sampled value queue is passed to amplitude limiting processing treated load value and carries out recurrence average filtering processing.
Wherein, theoretical dynamic load value is that system comes out according to movement velocity, acceleration, acceleration of gravity and Mass Calculation
Load value, be divided into following four kinds of situations:
When accelerating upward: F=mg+ma；
When accelerating downward: F=mg-ma；
When slowing down upward: F=mg-ma；
When slowing down downward: F=mg+ma；
In formula, F is theoretical dynamic load value, and m is load quality, and g is acceleration of gravity, and a is acceleration of motion.
Amplitude limit value can take 2-3 times of theoretical dynamic load value, will be greater than the load value removal of amplitude limit value.
Wherein, the step of incoming sampled value queue carries out recurrence average filtering processing can specifically include:
(1), amplitude limiting processing treated load value is passed to the tail of the queue of sampled value queue, the load value in sampled value queue can be with
It is 4-6；
(2), amplitude limiting processing treated the load value of the head of the queue of sampled value queue is removed；
(3), treated the load value of the amplitude limiting processing in queue is subjected to arithmetic average operation.
New load value is namely put into the tail of the queue of sampled value queue, and the data that will be located at head of the queue in sampled value queue
Then removal carries out arithmetic average operation to new sampled value queue.General filtering method can effectively eliminate impulse disturbances and be drawn
The deviation risen, but more wasteful control system memory.But present embodiment uses different filtering methods according to different loads, no
But it effectively removes the disturbance in signal and interference improves the reliability of signal, and control system memory is greatly saved.
As the further preferred of present embodiment, the multiple spot lifting body loading testing method further includes walking as follows
It is rapid:
If judge the loaded-up condition for unloaded lotus, mark zero is carried out to accessed load value.
Illustrate the course of work of this step in conjunction with Fig. 1: range ratio first being carried out to the load value got in step S100
Compared with when load value carries out zero school of automatic mark when allowing within the scope of automatic mark zero correction revision value, processor 3 is calculated by program
Automatic modification calibration deviant, i.e. program take this mark zero-deviation actual value to carry out plus and minus calculation automatically and realize automatic mark zero, guarantee
In zero load, each zero post-processing value of load value mark is all zero, and always using this automatic mark zero as subsequent before mark zero again
The a reference value of static load and dynamic load process, while the automatic modification calibration deviant of display in the operation interface, this step
Actually namely play the function of a peeling.Wherein automatic mark zero can be divided into zero load power on automatic mark zero, duty cycle from
Dynamic mark zero, that unloaded frequency of use marks zero automatically is several.It is exactly to power on every time that zero load, which powers on automatic mark zero, if detection is that zero load will
Automatically mark zero correction is carried out.Duty cycle marks zero automatically will to be carried out automatically when continuous idle time reaches a certain setting period
Mark zero correction.It is after the band by several period frequencies carries use that unloaded frequency of use marks zero automatically, and equipment is once unloaded will
Automatically mark zero correction is carried out.When the load value got in step S100 beyond allow automatic mark zero correction revision value range and
When automatic mark zero correction can not make signal post zero, system will be prompted to mark zero correction manually, and marking zero correction manually is by manually adjusting
Section signal conditioner 2 carries out mark zero to corresponding load value.
As the further preferred of present embodiment, the multiple spot lifting body loading testing method further includes replacing automatically
Distorted signal step, specific as follows:
When the load value of any jacking unit occurs abnormal, the abnormal load value is shielded, and jack its on unit with same
The average value of his load value substitutes.Police instruction can also be carried out in the operation interface simultaneously, tell a certain load of operator
Charge values are the average value after substitution, and request to carry out maintenance replacement to load detection unit 1.Multiple spot top is effectively guaranteed in this way
Rising mechanism will not ensure that correct, steady because of the emergency operating that is abnormal and influencing whole system of a certain load detection unit 1
Fixed, reliable operation.
Wherein, the multiple spot lifting body loading testing method can also include the following steps:
(1), the position of centre of gravity of computational load；
(2), judge whether position of centre of gravity deviates center of gravity predeterminated position, if so, issuing alarm.
Specifically, processor 3 is automatically stored initial steady state value F0 and calculates in bearing load initial static loading
The position of centre of gravity loaded out.Processor 3 remembers the initial steady state value F0 that each load detection unit 1 is surveyed and is stored in power down
In register, using this value as the static load a reference value of subsequent dynamic loading movement.Then by being obtained in step S100
To the load value of each jacking unit calculated, calculate the position of centre of gravity point of load.Equipped with n jacking unit, Mei Geding
Rising on unit has m load detection unit 1, then calculates using vector calculation formula:
FszRzβz=Fs11R11β11+Fs12R12β12+……+Fs1mR1mβ1m+Fs21R21β21+ Fs22R22β22+……
+Fs2mR2mβ2m+……Fsn1Rn1βn1+Fsn2Rn2βn2+……+FsnmRnmβnm；
In formula, Fs11 to Fsnm is load value detected by each load detection unit 1；
In formula, R11 to Rnm is the distance that each load detection unit 1 arrives multiple spot lifting body central point；
In formula, β 11 to β nm is the angle of each load detection unit 1 and multiple spot lifting body center point coordinate；
In formula, Fsz is the sum of load value detected by each load detection unit 1；
In formula, Rz and β z are required center of gravity vector value.
As it can be seen that by load center of gravity vector location point result analytical judgment, prompt with alarm load put whether
Balance, and warn a certain independent or multiple jacking units whether because loading imbalance occurs bearing load beyond feelings such as setting ranges
Condition.
Wherein, the multiple spot lifting body loading testing method can also include the following steps:
(1), the practical dynamic load value change curve of jacking unit is obtained；
(2), judge whether practical dynamic load value change curve is greater than curve preset value, if so, issuing alarm.
Specifically, processor 3 is by measurement and calculates in load load-bearing raising and the dynamic load motion process of decline
Practical dynamic load value and theoretical dynamic load value are obtained, and the two is compared in real time.Namely processor 3 can be surveyed in real time
The practical dynamic load value change curve of each load detection unit 1 is measured, while up and down speed is loaded by each lifting body
Degree calculates corresponding acceleration, and theoretical dynamic load value, it may be assumed that
Fl= F0±F0/g×△v/△t；
In formula, Fl is theoretical dynamic load value, and F0 is initial steady state value, that is, the static lower stable load value measured, equivalent
Actual weight on multiple spot lifting body；
In formula, g is acceleration of gravity, and △ v is velocity variations value in 3 sampling time of processor, when △ t is that processor 3 samples
Between.
The practical dynamic load value of each detection unit 1 and theoretical dynamic load value are calculated, it may be assumed that
︱ Fs-Fl ︱, that is, the absolute value of realistic border dynamic load value and the difference of theoretical dynamic load value, by each detection
The ︱ Fs-Fl ︱ of unit 1 is compared to judge whether load is steady normal in the process of running, and it is same whether each jacking movement runs
Step, and warn a certain independent or multiple jacking units whether because excessive velocities, mechanical stuck, functional failure of electromechanical, retard motion are former
Because occurring bearing the case where load is beyond setting range.
In addition, the present invention also provides a kind of multiple spot lifting body load detecting devices with reference to Fig. 1, comprising:
Multiple load detection units 1, are set on the jacking unit of multiple spot lifting body, jack what unit was born for detecting
Load value；
Multiple signal conditioners 2 are connect correspondingly with the load detection unit 1, are used for each zero school of jacking unit mark
Just, and load value is transmitted；
Processor 3 connects the signal conditioner 2, for handling data and instruction.
Wherein, I/O module 4 can also be connected in signal conditioner 2, and connects display device 5, CAN on processor 3
Communication interface 6 and ethernet communication interface 7, the effect of I/O module 4 are the analog signals that each load detection unit 1 is detected,
By operation amplifier and AD conversion, it is converted into the digital signal that processor 3 can identify, if processor 3 carries I/O module
4, just without in addition configuration I/O module 4.CAN communication interface 6 and ethernet communication interface 7 are, it can be achieved that for upper level management system
The intelligent networking of system, and the transmission range, stability and anti-interference ability of signal can be effectively improved.By with upper level management system
System networking can by the measurement data of load detection unit 1 carry out data filing and backup, and in each load running into
Row compares, and detects the aging and failure of lotus detection unit 1, by monitoring aging and the failure process of lotus detection unit 1, avoids pacifying
The generation of full accident.
Wherein, load detection unit 1 can be realized using pressure sensor, dynamometry bolt etc..Signal conditioner 2 can be adopted
With analog quantity transformation device.
The multiple spot lifting body load detecting device of present embodiment can apply above-mentioned multiple spot lifting body load completely
Detection method, therefore, the detection method, testing principle, beneficial effect of this detection device repeat no more, directly in present embodiment
Connect the embodiment with reference to detection method.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example
It is merely used to help understand method and its core concept of the invention.The above is only the preferred embodiment of the present invention, should refer to
Out, due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the ordinary skill people of the art
For member, without departing from the principle of the present invention, can also make it is several improve, retouching or variation, can also will be above-mentioned
Technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved design by invention and
Technical solution directly applies to other occasions, is regarded as protection scope of the present invention.
Claims (10)
1. a kind of multiple spot lifting body loading testing method characterized by comprising
Obtain the load value of each jacking unit；
According to the load value of each jacking unit, the loaded-up condition of multiple spot lifting body is judged；
If judge the loaded-up condition for unloaded lotus or static load, sampling is calculated using the way of median average filter
Value；
If judge the loaded-up condition for dynamic load, sampled value is calculated using clipping average filter method；
Judge whether the sampled value is greater than load preset value, if so, issuing alarm.
2. multiple spot lifting body loading testing method according to claim 1, which is characterized in that the median is averagely filtered
Wave method calculates sampled value
Multiple load values are continuously acquired, and remove maximum value and minimum value, surplus load Value Data is subjected to arithmetic average fortune
It calculates.
3. multiple spot lifting body loading testing method according to claim 1, which is characterized in that described average using clipping
Filter method calculates sampled value
Obtain the locomotion speed value, acceleration value and theoretical dynamic load value of each jacking unit；
Amplitude limiting processing is carried out to the load value；
Sampled value queue is passed to amplitude limiting processing treated load value and carries out recurrence average filtering processing.
4. multiple spot lifting body loading testing method according to claim 3, which is characterized in that the load value is limited
Width is handled
It takes 2-3 times of theoretical dynamic load value to be used as amplitude limit value, will be greater than the load value removal of amplitude limit value.
5. multiple spot lifting body loading testing method according to claim 3, which is characterized in that the incoming sampled value team
Column carry out recurrence average filtering processing
Amplitude limiting processing treated load value is passed to the tail of the queue of sampled value queue；
Remove amplitude limiting processing treated the load value of the head of the queue of sampled value queue；
Amplitude limiting processing in queue treated load value is subjected to arithmetic average operation.
6. multiple spot lifting body loading testing method according to claim 1, which is characterized in that the multiple spot lifting body
Loading testing method further include:
If judge the loaded-up condition for unloaded lotus, mark zero is carried out to accessed load value.
7. multiple spot lifting body loading testing method according to claim 1, which is characterized in that the multiple spot lifting body
Loading testing method further includes automatic replacement distorted signal step:
When the load value of any jacking unit occurs abnormal, the abnormal load value is shielded, and jack its on unit with same
The average value of his load value substitutes.
8. multiple spot lifting body loading testing method according to claim 1, which is characterized in that the multiple spot lifting body
Loading testing method further include:
The position of centre of gravity of computational load；
Judge whether position of centre of gravity deviates center of gravity predeterminated position, if so, issuing alarm.
9. multiple spot lifting body loading testing method according to claim 1, which is characterized in that the multiple spot lifting body
Loading testing method further include:
Obtain the practical dynamic load value change curve of jacking unit；
Judge whether practical dynamic load value change curve is greater than curve preset value, if so, issuing alarm.
10. a kind of multiple spot lifting body load detecting device characterized by comprising
Multiple load detection units, are set on the jacking unit of multiple spot lifting body, jack what unit was born for detecting
Load value；
Multiple signal conditioners are connect correspondingly with the load detection unit, are used for each jacking unit mark zero correction；
Processor connects the signal conditioner, for handling data and instruction.
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