For measuring the Intelligent preventive control method of prevention and control
Technical field
The present invention relates to weighbridge prevention and control fields, and in particular to a kind of for measuring the Intelligent preventive control method of prevention and control.
Background technique
The enterprise and factory that related to steel, coal, cement etc. need to weigh cargo at present can all use ground
Pound measures.But some unprincipled fellows spare no high price to develop the device that can be remotely controlled weighbridge under the driving of interests now,
The data of display can be increased or be reduced, to achieve the purpose that seek exorbitant profit.
Weighbridge mainly utilizes tabletting type sensor (strain gauge electric bridge, weight sensor or a weighing and sensing in other words
Device etc.) weight that will measure, charge transport is converted into single-chip microcontroller, then equipment is shown by MCU driving one, weight is shown
It shows and.Criminal changes the letter in weighbridge by between tabletting type sensor and single-chip microcontroller, filling a reception device steathily
Number transmission, pass through remote controler, realize cheating.
In response to this, after purchasing weighbridge, can all purchase again a set of prevents weighbridge for more and more enterprises now
The instrument being remotely controlled, to guarantee accuracy when weighbridge work, such instrument is commonly referred to as measuring prevention and control instrument, anti-prosecutor
Method is the electromagnetic wave of transmitting frequency same as cheating device, is interfered the signal of cheating device, distant by cheating device to avoid weighbridge
Control and distort the metering numerical value of weighbridge.
More original weighbridge cheating device is mostly the weighing results for emitting the radio change weighbridge of fixed frequency, such as
315MHz or 433MHz.Later, the case where practising fraud for this fixed frequency, market occur emitting the metering prevention and control of fixed frequency
Instrument.Present cribber with the development of technology is by changing tranmitting frequency, using the side of frequency conversion transmitting radio mostly
Method gets around and interferes biggish frequency (fixed frequency) range, to achieve the purpose that cheating.
The case where for present frequency conversion transmitting radio cheating, our company submitted the practical new of entitled " metering prevention and control instrument "
Type patent in the program, is matched by setting receiving module with FM transmission module, i.e. change in receiving module reception environment
Frequently (frequency modulation in other words) signal, after processing module is handled, allow FM transmission module emit identical with its frequency electric wave into
Row interference.But in practice, it has been found that a new problem, receiving module in fact can only receive in a certain range
Frequency signal, it is desirable to monitoring, the screen of the electric wave of this larger range frequency of 100-1000MHz are realized by receiving module
It covers, is in fact to be difficult to realize that scanning is received within this range.
Original design mainly reaches change by inputting all kinds of configuration files in metering prevention and control instrument by user
The parameter (such as inductance, impedance) of receiving module realizes the received mesh of electric wave signal of wide-band (100-1000MHz) range
, but user reflects that the operation of manual loading configuration file is excessively complicated, the parameter of receiving module just seldom changes from factory
Become.Therefore, we can just expect being capable of the automatically scanning (monitoring) in wide-band (100-1000MHz) range automatically by one kind
Receiving module be added in our metering prevention and control instrument, after consulting pertinent literature, discovery similar approach it is considerably less, mainly
It is that the processing module of present antenna relies on single-chip microcontroller mostly, but the processing capacity of existing single-chip microcontroller is limited, should bearing
, can be excessive due to configuration file when duty driving display module executes scan command again, in a wider frequency range, sweep
It is very slow to retouch speed.And in present environment, there is the electric wave largely interfered in the space environment as locating for us
Signal, if cannot effectively be excluded, easily be reported by mistake.
In response to this, it is badly in need of a kind of intelligence for being used to measure prevention and control that can be improved scanning speed, reduce wrong report now
It can preventing control method.
Summary of the invention
The present invention is directed to existing metering prevention and control instrument when executing the scanning of 100-1000MHz frequency bandwidth, scanning speed
Slowly, it is easy to appear the technical issues of wrong report, is provided a kind of for measuring the Intelligent preventive control method of prevention and control.
Base case provided by the invention are as follows: for measuring the Intelligent preventive control method of prevention and control, include the following steps:
Scan receiving step, the electric wave signal in target band width be separated at least two signal frequency ranges, setting with
The corresponding FM reception module of signal frequency range, FM reception module is respectively periodically to the electric wave signal in corresponding signal frequency range
Continuous sampling reception is carried out, each FM reception module is connected separately with corresponding processing module, and processing module analysis is corresponding
The signal strength that FM reception module receives, when the electric wave signal intensity of a certain frequency is more than threshold value, processing module is to this
The electric wave signal of the frequency of point value is analyzed and processed;
It scans and determines step, if the electric wave signal long-term existence of the frequency of the integer value, determines the frequency of the integer value
Electric wave signal be environmental disturbances, next period do not carry out sampling reception to the electric wave signal of the integer value frequency;If the integer
The frequency signal of value only exists in weight bridge weighing, then determines the electric wave signal of the frequency of the integer value for signal of practising fraud;
The frequency for signal of practising fraud is sent transmitting module, transmitting module transmitting and work by interference preventing control step, processing module
The identical interference signal of disadvantage signal frequency;
It interferes and determines step, the weight sensor of weighbridge is connect with check processing module and single-chip microcontroller respectively, in weight
Memory module is provided between sensor and single-chip microcontroller, the result that memory module weighs each weight sensor is recorded, supervised
After measuring cheating signal, the signal of the weight sensor received is transmitted to check processing module, check processing mould by single-chip microcontroller
Block receives the feedback data of weight sensor and single-chip microcontroller respectively, if feedback data unanimously if interference signal it is effective, if feedback coefficient
According to inconsistent, prove that weighing results are modified;
Warning note step checks processing module for the result and feeds back to report if there is the inconsistent situation of weighing results
Alert module, alarm module issues sound-light alarm, to remind user.
The principle of the present invention and advantage are: by received target band (100-1000MHz) in scanning receiving step
Electric wave signal in width is separated into multiple frequency ranges, setting FM reception module corresponding with frequency range after separation, FM reception
Module respectively receives the electric wave signal in its corresponding frequency band.It is a FM reception module of setting in existing design,
Reception ability, scanning speed is limited, in the present solution, multiple FM reception modules are received respectively with regard to different frequency ranges,
Sweep time is reduced, the received speed of scanning is improved.
It is determined in step scanning, the environment as locating for us is all always to have electric wave signal, if our meter
It measures prevention and control instrument in operation, cannot recognize that the control signal and environmental disturbances of cribber's remote controler, then this metering prevention and control
Instrument can not reach preferable control effect.Therefore, in the present solution, joined environment-identification interference function, this
Function needs to be manually entered unlike existing metering prevention and control instrument, but by comparison, search out the signal of environmental disturbances
Frequency avoids this frequency, on the one hand reduces the workload of scanning when FM reception module receives.On the other hand, even if
Some cribbers use this frequency, and emitting radio waves signal is practised fraud, but due to the presence of environmental disturbances, cribber
It is to be difficult to success of practising fraud.Therefore in scanning receiving step, also specifying signal strength will be more than threshold value, i.e., below this threshold value
Electric wave signal intensity it is weak, transmitting remote signal is difficult.More than threshold value environmental disturbances signal (in later reception, will not
It receives again, i.e. be equal to the integer frequency has a powerful transmitting module to the environmental disturbances signal, ceaselessly launches outward
Interference signal), cheating signal can also be interfered by the environmental disturbances signal.
Interference preventing control step is after practising fraud signal identification out, and transmitting module transmitting is identical with cheating signal frequency
Interference signal interferes cheating signal.
It interferes and determines step, be to determine that interference enters into force, data are not tampered in other words.Therefore, it uses multiple
Processing module is looked into, under normal circumstances, the design of weighbridge is that there is no check modules, therefore as background technique is said
Check module is to install additional in the later period.Cribber distorts data, is concentrated mainly between weight sensor and single-chip microcontroller, therefore
Weight sensor is connect with single-chip microcontroller and check processing module by we respectively, thus there are two signal paths, in weight
After the signal path of sensor and single-chip microcontroller is tampered, check processing module can be found in time, then carry out warning note.
The present invention is used to measure the Intelligent preventive control method of prevention and control, first is that the electric wave signal in target band width is separated into
Multiple frequency ranges allow multiple FM reception modules to receive respectively, compared with a FM reception module is only arranged in the prior art, improve
Scanning received speed;Second is that intelligence identifies environmental disturbances signal, and ignore the reception to environmental disturbances signal, drops
Low sampled point, to achieve the purpose that improve sample rate;Fourth is that check processing module can determine that interference comes into force, prevent from counting
According to being tampered.
Further, it scans in receiving step, sampling received sampled point is integer point value.Change a form of presentation, sampled point
Although narrowly discontinuous, sampled point is continuous integer value.The letter in a wider frequency section can either be reached in this way
It number receives, and also improves reception speed.I.e. in the identical situation of sampling number, received bin width meeting in this programme
It is substantially better than the prior art.
Further, it is interfering between determining step and warning note step, is further including high voltage protection step, handled in check
After module determines that weighing results are modified, the both ends of memory module, single-chip microcontroller and weight sensor are grounded respectively, are passed in weight
Circuit between sensor and memory module, memory module and single-chip microcontroller carries out high voltage stimulus with piezoelectric ceramics.Piezoelectric ceramics is said
More popular is exactly the electronic ignition device in electronic lighter, which can generate up to ten thousand volts of high pressure, but electric current
It is small, it is substantially harmless to human body, in the present invention, this device is added, is because the receiver of existing cheating is mounted on mostly
Between weight sensor and single-chip microcontroller, therefore after monitoring that data are tampered, start this device, reception device can be damaged
In chip or capacitor etc., and due to being grounded, weight sensor, single-chip microcontroller and memory module will not all be damaged
It is bad.
Further, in scanning receiving step, the electric wave signal in 100-1000MHz frequency bandwidth is separated into three letters
Three FM reception modules corresponding with signal frequency range are arranged in number frequency range.By our experiment simulations and prototyping testing, we
It was found that being divided into three frequency ranges, cost and scanning speed can be taken into account.
It further, automatically will be apart from current after the result in memory module is recorded in the storage cap more than memory module
The information deletion of time at most.Memory module can be allowed to operate normally, and calling verification of data history after user is facilitated to claim
Weight information.
Further, choose a central processing module, will processing module corresponding with each FM reception module respectively with
Central processing module connection allows central processing module to connect display module, and display module, which is shown, is currently judged as environmental disturbances
Signal frequency.A central processing module, which is arranged, can allow each FM reception module work more to be coordinated, and avoid the occurrence of
Multiple FM reception modules require the interference signal of transmitting module transmitting different frequency the same simultaneously.
Further, in scanning determining step, long-standing judgment criteria is that at least three FM reception modules connect
The period is received with the presence of the electric wave signal of the frequency, and in the presence of the electric wave signal, check processing module receives weight biography
Sensor is consistent with the feedback data of single-chip microcontroller.Such judgment criteria can more accurately determine the electric wave signal of environmental disturbances
Frequency.
Detailed description of the invention
Fig. 1 is the step flow chart of Intelligent preventive control embodiment of the method 1 of the present invention for measuring prevention and control;
Fig. 2 is the module frame chart for the system that embodiment 1 realizes the method for the present invention.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Embodiment 1 is substantially as shown in Fig. 1: for measuring the Intelligent preventive control method of prevention and control, including the following steps:
Receiving step is scanned, the electric wave signal in target band (100-1000MHz) width is separated into three separation letters
Number frequency range, is arranged three FM reception modules corresponding with signal frequency range, and FM reception module is respectively periodically to accordingly believing
The continuous sampling that electric wave signal in number frequency range carries out integer value receives.Continuous integral number value is it is to be understood that by 100-1000MHz
It is divided into 901 integer values, each FM reception module only periodically receives this 300 (or 301) integer value frequencies respectively
The electric wave signal of rate.Each FM reception module is connected separately with corresponding processing module, and processing module analyzes corresponding frequency modulation
The signal strength that receiving module receives, when the electric wave signal intensity of a certain integer point value frequency is more than threshold value, processing module
The electric wave signal of the frequency of the point value is analyzed and processed.Receiving step is scanned mainly to the electric wave signal in natural environment
Carry out the monitoring of frequency modulation type, i.e. electric wave signal in monitoring natural environment.
It scans and determines that step determines if the electric wave signal of the frequency of the integer value exists within three reception periods
The electric wave signal of the frequency of the integer value is environmental disturbances, and next period (the 4th scan period) is not to the integer value frequency
Electric wave signal carries out sampling reception;If the frequency signal of the integer value only exists (when working in other words) in weight bridge weighing,
Determine the electric wave signal of the frequency of the integer value for signal of practising fraud;
The frequency for signal of practising fraud is sent transmitting module, transmitting module transmitting and work by interference preventing control step, processing module
The identical interference signal of disadvantage signal frequency;
It interferes and determines step, the weight sensor of weighbridge is connect with check processing module and single-chip microcontroller respectively, in weight
Memory module is provided between sensor and single-chip microcontroller, the result that memory module weighs each weight sensor is recorded, supervised
After measuring cheating signal, single-chip microcontroller is transmitted to check processing module, check processing module point for the weight sensor received
Not Jie Shou weight sensor and single-chip microcontroller feedback data, if feedback data unanimously if interference signal it is effective, if feedback data is not
It is consistent then prove that weighing results are modified;
Warning note step, if occurring, weighing results are inconsistent, which is fed back to alarm module by check processing module,
Alarm module issues sound-light alarm, to remind user.
When specifically used: being determined in step scanning, the environment as locating for us is that all have electric wave signal always, such as
Fruit our metering prevention and control instrument in operation, cannot recognize that the control signal and environmental disturbances of cribber's remote controler, then this
A metering prevention and control instrument can not reach preferable control effect.Therefore, in the present solution, joined environment-identification interference
Function, this function needs to be manually entered unlike existing metering prevention and control instrument, but by comparison, searches out environmental disturbances
The frequency of signal avoid this frequency when FM reception module receives, the on the one hand smaller workload of scanning.It is another
Aspect, even if some cribbers use this frequency, emitting radio waves signal is practised fraud, but depositing due to environmental disturbances
Cribber is also to be difficult to success of practising fraud.
Therefore in scanning receiving step, also specifying signal strength will be more than threshold value, i.e. this threshold value is exactly below
Electric wave signal is exactly that signal strength is weak, and transmitting remote signal is difficult.More than the environmental disturbances signal (reception afterwards of threshold value
In, will not receive again, which is equal to the integer frequency and has a powerful transmitting module, ceaselessly to
Outgoing penetrates interference signal), cheating signal can also be interfered by the environmental disturbances signal.
To realize the above method, also disclose a kind of for measuring the Intelligent preventive control system of prevention and control, comprising:
FM reception module, the quantity of FM reception module is three, respectively periodically in separation signals frequency range
Electric wave signal carries out the sampling of continuous integral number value and receives.FM reception module can use the wide good honest and clean limited public affairs of electronics in Shenzhen South Mountain
The FM reception module for taking charge of the model GD-FSK8A of production, by different parameter settings, to reach to 100-1000MHz's
The spreadability of integer value frequency signal receives in range.
Processing module, the quantity of processing module are three, are connect respectively with FM reception module, and processing module analysis corresponds to
The signal strength that receives of FM reception module, when the electric wave signal intensity of a certain integer point value frequency is more than threshold value, place
Reason module is analyzed and processed the electric wave signal of the frequency of the point value, if the electric wave signal of the frequency of the integer value connects at three
It receives and exists in the period, then determine the electric wave signal of the frequency of the integer value for environmental disturbances, next period, (the 4th scanning was all
Phase) sampling reception is not carried out to the electric wave signal of the integer value frequency;If the frequency signal of the integer value is only in weight bridge weighing
(when working in other words) exists, then determines the electric wave signal of the frequency of the integer value for signal of practising fraud.Processing module can be mono- with PIC
Piece machine or SONIX MCU (SONIX), the anti-interference that this two single-chip microcontroller processes module are very good.It only needs herein
It is of less demanding to processing capacity, but it is more demanding to anti-interference ability.Using PIC single chip microcomputer in the present embodiment.
The frequency for signal of practising fraud is sent transmitting module by transmitting module, processing module, and transmitting module transmitting is believed with cheating
Number identical interference signal of frequency.Quanzhou honor can be used in the function that frequency conversion FM transmission in other words is needed if transmitting module
The frequency conversion transmitting module of Sheng Da telecom technology co., ltd production.
Memory module, memory module are arranged between weight sensor and single-chip microcontroller, and memory module senses each weight
The result record that device weighs automatically will be apart from working as after the result in memory module is recorded in the storage cap more than memory module
The information deletion of preceding time at most.It can be realized by memory if memory module.
Processing module is checked, three processing modules are connect with check processing module respectively, and check processing module is for coordinating
Three processing modules (primarily to facilitating user integrally to control, and for the whole operating status for holding this system), it is multiple
It looks into processing module to connect with weight sensor, single-chip microcontroller respectively, single-chip microcontroller is transmitted to check for the weight sensor received
Processing module, check processing module receive the feedback data of weight sensor and single-chip microcontroller respectively, if feedback data unanimously if do
It is effective to disturb signal, proves that weighing results are modified if feedback data is inconsistent.PIC single chip microcomputer or SONIX MCU can be used
(SONIX), this two single-chip microcontroller process module anti-interference it is very good.What is only needed herein requires not processing capacity
Height, but it is more demanding to anti-interference ability.Using PIC single chip microcomputer in the present embodiment.
Alarm module checks processing module and the result is fed back to alarm module, if it is inconsistent weighing results occur, alarm
Module issues sound-light alarm, to remind user.Alarm module can be realized with buzzer, LED light, light emitting diode etc..This
Buzzer and light emitting diode used in the examples.
Embodiment 2
Compared with Example 1, it the difference is that only, determined between step and warning note step interfering, further include
High voltage protection step, after check processing module determines that weighing results are modified, memory module, single-chip microcontroller and weight sensor
Both ends be grounded respectively, the circuit piezoelectric ceramics between weight sensor and memory module, memory module and single-chip microcontroller into
Horizontal high voltage stimulation.
In the present embodiment, a kind of system to realize the above method is also disclosed, compared with the system in embodiment 1,
It the difference is that only, further include high voltage protection module, the setting of high voltage protection module is in weight sensor and memory module, storage
On circuit between module and single-chip microcontroller, check processing module determine that weighing results are modified after, memory module, single-chip microcontroller with
And the both ends of weight sensor are grounded respectively.The piezoelectric ceramics custom that holds water a little is exactly that electronic ignition in electronic lighter fills
It sets, which can generate up to ten thousand volts of high pressure, but electric current is small, and it is substantially harmless to human body, in the present invention, this is added
Device is because the receiver of existing cheating is mounted between weight sensor and single-chip microcontroller mostly, therefore is monitoring to count
After being tampered, start this device, chip or capacitor etc. in reception device can be damaged, and due to being grounded,
Weight sensor, single-chip microcontroller and memory module will not be all damaged.
Embodiment 3
Compared with Example 1, it the difference is that only, choose a central processing module, specific signal can be selected existing
There is the processing chip of the I3 series of PC computer, adds some peripheral circuits, in certain the present embodiment, using PC computer,
The corresponding processing module of each FM reception module is connect with PC computer respectively, and PC computer is allowed to connect display module, display module
Display is currently judged as the frequency of the signal of environmental disturbances.A PC computer, which is arranged, can allow each FM reception module to work
More coordinate, avoid the occurrence of multiple FM reception modules while requiring the interference signal of transmitting module transmitting different frequency the same,
Thus using the computing capability of PC computer.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.