CN102419347A - Brake pad quality detection control device, its usage method and application - Google Patents
Brake pad quality detection control device, its usage method and application Download PDFInfo
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- CN102419347A CN102419347A CN2011102453591A CN201110245359A CN102419347A CN 102419347 A CN102419347 A CN 102419347A CN 2011102453591 A CN2011102453591 A CN 2011102453591A CN 201110245359 A CN201110245359 A CN 201110245359A CN 102419347 A CN102419347 A CN 102419347A
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Abstract
The invention discloses a brake pad quality detection control device, comprising an industrial control computer, a soundproof chamber, a brake pad transportation unit, a defective screening unit, an audio frequency generation unit, an audio frequency collector, and a programmable logic controller (PLC), wherein, the PLC controls the audio frequency generation unit, the brake pad transportation unit and the defective screening unit to work by inputting and outputting signals to realize the quality detection of the brake pad to be detected at a right detection position in the soundproof chamber and generate audio signals; and the PLC can be used for receiving the quality feedback signals generated by the industrial control computer. Compared with the quality detection of the brake pad by an artificial mode in the prior art, the artificial mode is replaced by an automatic mode to allow the brake pad quality detection control device to effectively and accurately detect defective brake pads, thus the work efficiency is increased, and the detection quality is guaranteed.
Description
Technical field
The present invention relates to the control device of the quality testing of control device, particularly a kind of disc brake pad that a kind of quality of brake pad detects.
Background technology
Along with science and technology development; Auto industry is also progressive constantly; Automobile becomes the necessity in people's life gradually, and the security of automobile also becomes the focus that people pay close attention to day by day, and brake block is a breaking piece very crucial in the automobile brake system; Greatly all because brake failure causes, the quality of this and brake block has direct relation in etesian traffic hazard.Since brake pad material in mixed process because misoperation or stirring technique are unreasonable, advanced poor, thus cause mixing inhomogeneous, be doped into air, in brake block, form the cavity.The size in this cavity is often between 0.5～2.5mm; The quantity in cavity has tens even up to a hundred; In common quality inspection process, be difficult to detect these cavities, and the harm that bring in these cavities is huge, and the wearing quality of brake block is obviously descended; The thermal conductivity coefficient reduces, and has a strong impact on the serviceable life of brake block.Traditional brake block detection method is to adopt manual detection; Normally with hammer each position of brake block is knocked by veteran workman; There is a lot of defectives in this method, and error ratio is bigger, and various factors is very big to workman's influence; Can cause testing result incorrect, and this detection method is time-consuming, effort.Various shortcomings more than existing just because of traditional detection method make many brake blocks manufacturer ignore the detection to the brake block outgoing, are because this detection method is bothersome on the one hand; Can extend manufacture cycle; Thereby the increase production cost, on the other hand, traditional detection method is high to workman's technical requirement; Workman's fatiguability that works long hours is difficult to guarantee the correctness of testing result.
Summary of the invention
In order to overcome above defective; The present invention adopts full automatic mode to replace manual detection; A kind of novel quality of brake pad detection control apparatus is provided, makes the brake block pick-up unit can detect the substandard products brake block efficiently and accurately and improved work efficiency greatly, guaranteed the detection quality.
For solving the problems of the technologies described above, the invention provides a kind of quality of brake pad detection control apparatus, it comprises:
Industrial computer is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room;
The brake block transfer unit, it is used for said brake block to be detected is transported to the detection position of said soundproof room;
The substandard products screening part, it is used for the brake block that has quality problems is put into the substandard products exclusion zone;
The audio frequency generation part, it is used to make said brake block to be detected to produce sound signal;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); Be used for controlling said audio frequency generation part through input/output signal; Said brake block transfer unit; The work of said substandard products screening part realizes that said brake block to be detected correct detection position in said soundproof room carries out quality testing, produces sound signal;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
Wherein, said brake block transfer unit further comprises:
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for the detection position of said brake block vertical transport to be detected to said audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, said brake block to be detected are transported to the detection position at said audio frequency generation part place;
Air compressor, it is used to and pushes away cylinder on said power is provided;
The brake block position detection component; It is used to detect said brake block to be detected whether in the appropriate location of said soundproof room and in the detection position at said audio frequency generation part place; And give said programmable logic controller (PLC) (PLC) with information feedback; By the operation of said travelling belt stepper motor of said programmable logic controller (PLC) (PLC) control and said first solenoid valve, so control said travelling belt and said on push away cylinder said brake block to be detected accurately be transported to the detection position that said audio frequency generation part belongs to.
Wherein, Said substandard products screening part further comprises substandard products screening cylinder, second solenoid valve and is used to the air compressor that said substandard products screening cylinder provides power; Through said industrial computer said brake block to be detected is carried out quality testing; When substandard products occurring; Said industrial computer is given said programmable logic controller (PLC) (PLC) with signal feedback, by the break-make of said second solenoid valve of said programmable logic controller (PLC) (PLC) control, and then controls said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone.
Wherein, said audio frequency generation part comprises:
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position.
Wherein, said audio collection device adopts the electret vibrating membrane to gather sound.
Wherein, Said brake block position detection component is 3; The position of the first brake block position detection component is positioned at said soundproof room; The position of the second brake block position detection component is positioned on the said audio frequency generation part, and the position of the 3rd brake block position detection component is positioned at said substandard products screening cylinder front side.
Wherein, said number of knocking hammer and said electromagnet is 6-8, and through this 6-8 electromagnet being carried out order break-make electricity, the order of utilizing its adhesive realization to knock hammer is knocked.
For solving the problems of the technologies described above, the present invention also provides a kind of quality of brake pad detection control apparatus, and it comprises:
Industrial computer is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room;
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for the detection position of said brake block vertical transport to be detected to audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, and said brake block to be detected is transported to the detection position;
Substandard products screening cylinder, it is used for the brake block that has quality problems is transported to the substandard products exclusion zone;
Second solenoid valve, the break-make through said second solenoid valve of said programmable logic controller (PLC) (PLC) control and then control said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone;
Air compressor, it is used to and pushes away cylinder on said and said substandard products screening cylinder provides power;
The first brake block position detection component is used to judge that whether said travelling belt send into said brake block to be detected the assigned address of said soundproof room;
The second brake block position detection component is used to judge whether the said push cylinder that goes up sends said brake block to be detected into the detection position that said audio frequency generation part belongs to;
The 3rd brake block position detection component is used to detect the position that whether has substandard products to arrive its place;
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); Be used for through input/output signal control the first brake block position detection component, the second brake block position detection component, the 3rd brake block position detection component, the operation of knocking hammer support linear stepping motor, electromagnet, first solenoid valve, second solenoid valve, travelling belt stepper motor realizes that said brake block to be detected correct detection position in said soundproof room carries out quality testing; Produce sound signal; Signal is passed to said audio collection device, and accept signal from said industrial computer;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
For solving the problems of the technologies described above, the present invention also provides and has adopted above-mentioned quality of brake pad detection control apparatus to carry out the method that quality of brake pad detects, and it comprises:
The first step through careful processing, obtains to meet the standard brake block of industrial requirement, adopts said quality of brake pad detection control apparatus to gather its audio frequency, obtains the scope of standard audio;
Second step; Through brake block to be detected being conveyed into said quality of brake pad detection control apparatus; Through the audio frequency of relatively its generation and the audio frequency of said standard brake block; If the audio frequency of said brake block to be detected is lower than the audio frequency of said standard brake block, then explain to contain porosely in the said brake block to be detected, be substandard products.
The present invention also provides above-mentioned quality of brake pad detection control apparatus or described quality determining method to make the application in the process at vehicle.
Beneficial technical effects of the present invention is:
The mode artificial with respect to available technology adopting detects quality of brake pad; The present invention adopts full automatic mode to replace manual detection; A kind of novel quality of brake pad detection control apparatus is provided; Make the brake block pick-up unit can detect the substandard products brake block efficiently and accurately and improved work efficiency greatly, guaranteed the detection quality.
Description of drawings
Fig. 1 is the schematic diagram of quality of brake pad detection control apparatus;
Fig. 2 is PLC control principle figure;
Fig. 3 is the connected mode figure of PLC and travelling belt stepper motor;
The process flow diagram that Fig. 4 judges substandard products for substandard products screening cylinder;
Fig. 5 is PLC and the connected mode figure that knocks hammer support linear stepping motor.
Embodiment
The invention provides a kind of quality of brake pad detection control apparatus, it comprises:
Industrial computer, it is a host computer, is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room, thereby produces audio frequency;
The brake block transfer unit, it is used for said brake block to be detected is transported to the detection position of said soundproof room;
The substandard products screening part, it is used for the brake block that has quality problems is put into the substandard products exclusion zone;
The audio frequency generation part, it is used to make said brake block to be detected to produce sound signal;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); It is a slave computer; Be used for controlling said audio frequency generation part said brake block transfer unit, the work of said substandard products screening part through input/output signal; Realize that said brake block to be detected correct detection position in said soundproof room carries out quality testing, produce sound signal;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
Further, said quality of brake pad detection control apparatus only is made up of above-mentioned parts.
Host computer is meant that the people can directly send the computing machine of controlling order, generally is PC, shows on the screen that various signals change (hydraulic pressure, water level, temperature etc.).Slave computer is the computing machine that direct opertaing device obtains status of equipment, generally is PLC/ single-chip microcomputer and so on.Slave computer is at first given in the order that host computer sends, and slave computer becomes the corresponding time sequence signal directly to control relevant device according to this command interpretation again.Slave computer is fetch equipment status data (being generally analog quantity) frequently, converts digital signal to and feeds back to host computer.
Wherein, said brake block transfer unit further comprises:
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room, and this position is the below of said audio frequency generation part;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for horizontal feed to the brake block vertical transport said to be detected of the said soundproof room appropriate location detection position to said audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, said brake block to be detected are transported to the detection position at said audio frequency generation part place;
Air compressor, it is used to and pushes away cylinder on said power is provided;
The brake block position detection component; It is used to detect said brake block to be detected whether in the appropriate location of said soundproof room and in the detection position at said audio frequency generation part place; And give said programmable logic controller (PLC) (PLC) with information feedback; By the operation of said travelling belt stepper motor of said programmable logic controller (PLC) (PLC) control and said first solenoid valve, so control said travelling belt and said on push away cylinder said brake block to be detected accurately be transported to the detection position that said audio frequency generation part belongs to.
Further, said brake block transfer unit only is made up of above-mentioned parts.
Wherein, said first solenoid valve is preferably the solenoid valve of three port two position, and original state is normally closed.
Wherein, switch on and off, make push cylinder accomplish the action that pushes away and descend, brake block is delivered to the detection position of appointment, and after detecting completion, reset through the left and right position of controlling first solenoid valve.
Wherein, Said substandard products screening part further comprises substandard products screening cylinder, second solenoid valve and is used to the air compressor that said substandard products screening cylinder provides power; Through said industrial computer said brake block to be detected is carried out quality testing; When substandard products occurring; Said industrial computer is given said programmable logic controller (PLC) (PLC) with signal feedback, by the break-make of said second solenoid valve of said programmable logic controller (PLC) (PLC) control, and then controls said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone.
Wherein, through switching on and off second solenoid valve, the motion of control substandard products screening cylinder piston rod, thereby the screening process of completion substandard products.
Wherein, the air compressor of said brake block transfer unit and said substandard products screening part can be identical, also can be different.
Wherein, Said brake block position detection component is preferably 3; The first brake block position detection component is used to judge that whether said travelling belt send into said brake block to be detected the assigned address of said soundproof room; The said first brake block detection part feeds back to said programmable logic controller (PLC) (PLC) with information judged and by the said driving-belt stepper motor operation of said programmable logic controller (PLC) (PLC) control, so the motion of controlling said travelling belt with stop; The second brake block position detection component is used to judge the said detection position that push cylinder whether will said brake block to be detected be sent into said audio frequency generation part place of going up, and the said second brake block detection part feeds back to said programmable logic controller (PLC) (PLC) with information judged and goes up the motion of push cylinder and stop by said programmable logic controller (PLC) (PLC) control is said; The 3rd brake block position detection component is used to detect the position that whether has substandard products to arrive its place; Arrive as substandard products, said the 3rd brake block position detection component with signal feedback give said programmable logic controller (PLC) (PLC) and by the motion of the said substandard products screening of said programmable logic controller (PLC) (PLC) control cylinder with stop.
Wherein, The position of the said first brake block position detection component is positioned at said soundproof room; The position of the said second brake block position detection component is positioned on the said audio frequency generation part, and the position of said the 3rd brake block position detection component is positioned at said substandard products screening cylinder front side.
Wherein said brake block position detection component is preferably infrared position detecting device; When the said infrared position detecting device of said brake block process; Cut off the infrared ray of said infrared position detecting device, said infrared ray position detecting device sends signal to said programmable logic controller (PLC) (PLC).
Wherein, said second solenoid valve is preferably the solenoid valve of three port two position, and original state is normally closed.
Wherein, said audio frequency generation part comprises:
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position.
Further, said audio frequency generation part only is made up of above-mentioned parts.
Wherein, said number of knocking hammer and said electromagnet is preferably 6-8, and through this 6-8 electromagnet being carried out order break-make electricity, the order of utilizing its adhesive realization to knock hammer is knocked.
Wherein, it is DC12V-14V that said electromagnet is preferably rated voltage, and stroke is 5mm-7mm; The electromagnet that when energising voltage reaches 10.5V, begins to move; Further preferred Dongguan dan tone tablet is the MK0994 type electromagnet of Electronics Factory's production with keen determination, and the rated voltage of this electromagnet is DC12V, and stroke is 5mm; When energising voltage reaches 10.5V, begin action, start flexibly.
Wherein, said audio collection device adopts the electret vibrating membrane to gather sound, and said electret vibrating membrane is a slice plastic film as thin as a wafer; Wherein one side has the proof gold film, and behind the high-voltage electric field electret, the charges of different polarity are had on the two sides of said electret vibrating membrane respectively stationed; Have gold thin film towards outside, be connected with metal shell, keep apart with thin insulation lining ring between another side and the metal polar plate; Like this, just form an electric capacity between proof gold film and the metal polar plate.When the electret vibrating membrane runs into acoustic vibration, cause that the electric field at electric capacity two ends changes, thereby produced the alternating voltage that changes with sound wave.Because the output signal is a μ V level, need through sending industrial computer to after the voice data collector for processing.
The present invention also provides a kind of quality of brake pad detection control apparatus, comprising:
Industrial computer, it is a host computer, is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room, thereby produces audio frequency;
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room, and this position is the below of said audio frequency generation part;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for horizontal feed is transported to the brake block said to be detected of said soundproof room appropriate location the detection position at audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, and said brake block to be detected is transported to the detection position;
Substandard products screening cylinder, it is used for the brake block that has quality problems is transported to the substandard products exclusion zone;
Second solenoid valve, the break-make through said second solenoid valve of said programmable logic controller (PLC) (PLC) control and then control said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone;
Air compressor, it is used to and pushes away cylinder on said and said substandard products screening cylinder provides power;
The first brake block position detection component is used to judge that whether said travelling belt send into said brake block to be detected the assigned address of said soundproof room;
The second brake block position detection component is used to judge whether the said push cylinder that goes up sends said brake block to be detected into the detection position that said audio frequency generation part belongs to;
The 3rd brake block position detection component is used to detect the position that whether has substandard products to arrive its place;
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); Be used for through input/output signal control the first brake block position detection component, the second brake block position detection component, the 3rd brake block position detection component, the operation of knocking hammer support linear stepping motor, electromagnet, first solenoid valve, second solenoid valve, travelling belt stepper motor realizes that said brake block to be detected correct detection position in said soundproof room carries out quality testing; Produce sound signal; Signal is passed to said audio collection device, and accept signal from said industrial computer;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
Wherein, The position of said first brake block is positioned at said soundproof room; The position of the said second brake block detection part is positioned on the said audio frequency generation part; The position of said the 3rd brake block detection part is positioned at said substandard products screening cylinder front side substandard products screening part, and it is used for the brake block that has quality problems is put into the substandard products exclusion zone.
Wherein said brake block position detection component is preferably infrared position detecting device; When the said infrared position detecting device of said brake block process; Cut off the infrared ray of said infrared position detecting device, said infrared ray position detecting device sends signal to said programmable logic controller (PLC) (PLC).
Wherein, said audio collection device adopts the electret vibrating membrane to gather sound, and said electret vibrating membrane is a slice plastic film as thin as a wafer; Wherein one side has the proof gold film, and behind the high-voltage electric field electret, the charges of different polarity are had on the two sides of said electret vibrating membrane respectively stationed; Have gold thin film towards outside, be connected with metal shell, keep apart with thin insulation lining ring between another side and the metal polar plate; Like this, just form an electric capacity between proof gold film and the metal polar plate.When the electret vibrating membrane runs into acoustic vibration, cause that the electric field at electric capacity two ends changes, thereby produced the alternating voltage that changes with sound wave.Because the output signal is a μ V level, need through sending industrial computer to after the voice data collector for processing.
The present invention also provides and has adopted above-mentioned quality of brake pad detection control apparatus to carry out the method that quality of brake pad detects, and it comprises:
The first step through careful processing, obtains to meet the standard brake block of industrial requirement, adopts above-mentioned quality of brake pad detection control apparatus to gather its audio frequency, obtains the scope of standard audio;
Second step; Through brake block to be detected being conveyed into above-mentioned quality of brake pad detection control apparatus; Through the audio frequency of relatively its generation and the audio frequency of said standard brake block; If the audio frequency of said brake block to be detected is lower than the audio frequency of said standard brake block, then explain to contain porosely in the said brake block to be detected, be substandard products.
Wherein, the scope of said standard frequency is preferably 4kHz-6kHz.
Wherein, The method of said quality testing; Further comprise: in the 3rd step, when said brake block to be detected is substandard products, said quality of brake pad detection control apparatus is conveyed into the substandard products exclusion zone with it; When said quality of brake pad to be detected met the requirements, said quality of brake pad detection control apparatus was conveyed into the warehouse with it.
The present invention also provides above-mentioned quality of brake pad detection control apparatus or has adopted this device to carry out the quality of brake pad detection method and make the application in the process at vehicle.
Below will combine accompanying drawing and embodiment to specify embodiment of the present invention, how the application technology means solve technical matters to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and implement according to this.
At first through processing the brake block of the standard of acquisition carefully, through knocking the frequency of gathering its sound, and determine a standard frequency scope according to test of many times, the standard frequency scope is between 4kHz-6kHz.
The schematic diagram of quality of brake pad detection control apparatus is as shown in Figure 1, adopts industrial computer as host computer, and the sound signal that the audio collection device is gathered is into carried out analyzing and processing, follows standard audio to compare, thereby draws the quality of quality of brake pad.Adopt programmable logic controller (PLC) PLC travelling belt stepper motor, first solenoid valve, second solenoid valve, air compressor to be controlled as slave computer; And according to the signal of position transducer; Control the break-make of first solenoid valve and second solenoid valve, thereby the motion of push cylinder and substandard products screening cylinder is gone up in control.Each unit described in Fig. 1, detailed respectively discussing in the technical Analysis below.
The control principle figure of programmable logic controller (PLC) PLC is as shown in Figure 2.PLC is through receiving the signal that infrared sensor transmits; Decide each topworks how to move; PLC is through sending pulse signal to stepper motor driver, and the motion of control step motor realizes the feeding of brake block; Through the break-make of control solid-state relay, the work that comes control electromagnetic valve, electromagnet and air compressor.
The motion of travelling belt, travelling belt effect are that brake block is delivered in the soundproof room, and travelling belt relies on the travelling belt stepper motor to drive; 1 brake block is sent in the soundproof room at every turn, sends the motion that pulse command is controlled the travelling belt stepper motor through programmable logic controller (PLC) PLC to the travelling belt stepper motor driver, the model that the travelling belt stepper motor is selected for use is the BS42HB38-01 type stepper motor that Shenzhen Bai Shan electromechanical integration company limited produces; Travelling belt stepper motor driver model is selected DM245M type driver for use; The connected mode of travelling belt stepper motor and programmable logic controller (PLC) PLC is as shown in Figure 3, and wherein current-limiting resistance R1 selects 510 Ω resistance for use, and current-limiting resistance R2 selects 820 Ω resistance for use; The PU+ end of DM245M type driver is connected with the VCC end of PLC; The PU-end is connected with Y0, and through Y0 output pulse signal control step motor, DM245M type driver SM+ end is connected with the VCC end of PLC; The SM-end is connected with Y27; When Y27 was low level, driver turn-offed motor coil electric current, motor stall.
Brake block position detecting device, the position probing of brake block rely on three infrared position detecting devices to realize, are respectively the first infrared position detecting devices, the second infrared position detecting device, the 3rd infrared position detecting device.Travelling belt drags after brake block enters into soundproof room; Need to confirm the correct placement location of brake block, the basis on location first infrared position detecting device is here judged, when brake block moves to assigned address; Can block the infrared ray that the first infrared position detecting device sends; Brake block has been moved to correct position this moment, and the first infrared position detecting device detects brake block can send signal to programmable logic controller (PLC) PLC input end X1, the stop motion of control travelling belt stepper motor; Behind time-delay 2s; Last push cylinder piston drives supporting plate and moves upward; When the moving brake block of supporting plate holder rose to suitable beating position, brake block can block to be installed in and knock the infrared ray that the second infrared position detecting device on the hammer support sends, when the second infrared position detecting device detects brake block arrival assigned address; Input end X2 to programmable logic controller (PLC) PLC sends signal, push cylinder stop motion in the control; When detecting brake block when having quality problems; Need be with bad part eject, will be parked in the substandard products exclusion zone exactly this moment with substandard products, and substandard products screening cylinder could be reliably with bad part eject; The 3rd infrared position detecting device is installed in substandard products screening cylinder front side; When detecting brake block when moving to this position, the 3rd infrared position detecting device sends signal to programmable logic controller (PLC) PLC, and whether programmable logic controller (PLC) PLC is that substandard products come comprehensively to judge whether to start substandard products screening cylinder with this signal according to testing result; When testing result is that substandard products and infrared position detecting device have detected brake block and pass through; The action of substandard products screening cylinder, the V-type pawl that relies on substandard products screening cylinder front end to drive screens the substandard products brake block, and is as shown in Figure 4 to the decision flow chart of substandard products.
Last push cylinder, the effect of last push cylinder are to be placed into correct beating position to brake block, guarantee respectively to knock that hammer can knock to position accurately, thereby guarantee the accuracy that detects.The motion of last push cylinder is controlled through first solenoid valve; When first solenoid valve was connected, the pressurized air in the air compressor entered into push cylinder through pipeline, promoted piston and moved upward; Driving brake block through supporting plate moves upward; Judge the position that brake block rises through second infrared detecting device, when brake block rises to correct position, the cylinder stop motion.The type selecting of last push cylinder is the SC-50x50-20-LB cylinder that Ya De visitor company produces, and the model that first solenoid valve is selected for use is the 3V110-06-NC-DC12 that Ya De visitor company produces, three port two position, and original state is normally closed solenoid valve.
Moving of hammer knocked in detection; Because shape and the size of the different batches brake block that need to detect can change, need to regulate the position of respectively knocking hammer, knock hammer and be installed in and have knocking of U type groove and hammer into shape on the support; Knock the linear stepping motor of hammer support through button control; Can realize doing linear reciprocating motion, knock hammer under the drive of knocking the hammer support, realize the adjustment of position.The type selecting of linear stepping motor is Hayden's 21000 serial hybrid linear stepper motors, and the stroke of stepper motor is 9mm.Adopt the driver of Hayden's high-performance subdivision driver DCM8028 as stepper motor, programmable logic controller (PLC) PLC is as shown in Figure 5 with the connected mode of knocking hammer support linear stepping motor, and current-limiting resistance R3 selects 560 Ω resistance for use; The Pul+ of DCM8028 driver end, Dir+ end, Ena+ end are connected with the VCC end of PLC, and Pul-holds and is connected with the output terminal Y11 of PLC, and the output terminal Y11 through PLC sends pulse signal to driver; The control step motor movement, the Dir-end is connected the rotating of control step motor with the output terminal Y21 of PLC; When Y21 output high level, stepper motor just changes, when the Y21 output low level; The stepper motor counter-rotating, the Ena-end is connected the duty of Control Driver with the Y30 end of PLC; When the output terminal Y30 of PLC output high level; Drive operation, when the output terminal Y30 of PLC output low level, driver quits work.
Knock the effect of hammer through electromagnet and realize knocking motion, successively six electromagnet are carried out the break-make electricity and realize that six are knocked hammer and knock successively in order, control through the make-and-break time of control electromagnet and knock the time that hammer knocks.What electromagnet was selected for use is the Dongguan dan tone tablet MK0994 type electromagnet of Electronics Factory's production with keen determination, and the rated voltage of this electromagnet is DC12V, and stroke is 5mm, when energising voltage reaches 10.5V, begins action, starts flexible.Electromagnet is installed in the U type bottom portion side of knocking hammer U type support.
The collection of sound signal, the audio collection device is sent in the industrial computer gathering the audio frequency that comes, and compares through handling with standard audio, when wherein having any one and standard audio not simultaneously, just judges that this brake block is substandard products.The audio collection device adopts the electret vibrating membrane to gather sound, and it is a slice plastic film as thin as a wafer, and one side is evaporated last layer proof gold film therein.And then through behind the high-voltage electric field electret, the charges of different polarity are had on the two sides respectively stationed.The steaming gold of diaphragm towards outside, be connected with metal shell.Keep apart with thin insulation lining ring between the another side of diaphragm and the metal polar plate.Like this, steam and just form an electric capacity between golden film and the metal polar plate.When the electret diaphragm runs into acoustic vibration, cause that the electric field at electric capacity two ends changes, thereby produced the alternating voltage that changes with sound wave.Because the output signal is a μ V level, need through sending industrial computer to after the voice data collector for processing.
The screening of substandard products is when the detection brake block is substandard products, through second solenoid valve action of programmable logic controller (PLC) PLC control substandard products screening cylinder; Through switching on and off second solenoid valve, the motion of control substandard products screening cylinder piston rod, thereby the screening process of completion substandard products; If brake block is qualified; Substandard products screening cylinder then can not move, and product will pass through travelling belt and deliver to the warehouse, have only when detecting to substandard products and just can move.
Each input port of PLC distributes as shown in table 1.
Table 1
| X0 | Start button |
| X1 | The first infrared position detecting device |
| X2 | The second infrared position detecting device |
| X3 | Substandard products |
| X4 | The 3rd infrared position detecting device |
| X5 | Supporting plate resets |
| X6 | Air compressor starts |
| X7 | First knocks hammer support positive movement button |
| X10 | Second knocks hammer support positive movement button |
| X11 | The 3rd knocks hammer support positive movement button |
| X12 | The 4th knocks hammer support positive movement button |
| X13 | The 5th knocks hammer support positive movement button |
| X14 | The 6th knocks hammer support positive movement button |
| X15 | First knocks hammer support counter motion button |
| X16 | Second knocks hammer support counter motion button |
| X17 | The 3rd knocks hammer support counter motion button |
| X20 | The 4th knocks hammer support counter motion button |
| X21 | The 5th knocks hammer support counter motion button |
| X22 | The 6th knocks hammer support counter motion button |
Each output port of PLC distributes as shown in table 2.
Table 2
The concrete course of work is following:
Start button is connected with the input end X0 of programmable logic controller (PLC) PLC, and when pressing start button, the output Y0 of programmable logic controller (PLC) PLC connects; The travelling belt stepper motor brings into operation, and drives conveyer belt, and brake block is under the dragging of travelling belt; Move in the soundproof room, when the first infrared position detecting device detected the brake block arrival, the first infrared position detecting device sent signal to the input end X1 of programmable logic controller (PLC) PLC; X1 connects, the normally closed disconnection of X1, and the output Y0 of control PLC breaks off; The travelling belt stepper motor is out of service, and behind time-delay 2s, the output terminal Y1 of PLC connects; The right position of first solenoid valve is connected, and makes the pressurized air in the air compressor get into the rodless cavity of going up push cylinder through the right position of first solenoid valve, and piston drives supporting plate and moves upward; Thereby the moving brake block of holder rises, and when second infrared detecting device detects brake block, sends signal to the input end X2 of programmable logic controller (PLC) PLC; X2 connects, the normally closed disconnection of X2, and the output terminal Y1 of control PLC breaks off; The meta of first solenoid valve is connected, and makes the cylinder locking, and the normal switching of the input end X2 of programmable logic controller (PLC) PLC is simultaneously closed; Make the output terminal Y9 of programmable logic controller (PLC) PLC closed, control first is knocked hammer brake block is knocked, and second to the 6th knocks hammer postpones to carry out hammer action successively behind the 2s through the inner time relay of programmable logic controller (PLC) PLC.To respectively knock hammer through the audio collection device and knock the sound collection that brake block sends and be sent on the industrial computer, industrial computer is analyzed gathering the audio frequency that comes, and compares with standard audio; If detect brake block is substandard products; Industrial computer then sends signal to the input end X3 of PLC, and X3 is connected, for next step substandard products screening is prepared; If detect to certified products, then do not send signal to programmable logic controller (PLC) PLC.After knocking completion the last time,, the output terminal Y2 of PLC is connected through PLC internal delay time relay time-delay 2S; The position, a left side of first solenoid valve is connected, and the pressurized air in the air compressor gets into the rod chamber of going up push cylinder through the position, a left side of first solenoid valve, when brake block drops on the travelling belt; Can block the infrared ray that the first infrared position detecting device sends again, the first infrared position detecting device sends signal to the input end X5 of PLC, and X5 connects; The output Y0 of PLC connects, the operation of travelling belt stepper motor, and travelling belt drives brake block and travels forward; This moment, travelling belt was sent brake block into warehouse storage if detecting brake block is specification product, was substandard products if detect brake block; When brake block moved to the 3rd infrared position detecting device, the 3rd infrared position detecting device sent signal to the input end X4 of programmable logic controller (PLC) PLC, and X4 connects; Input end X3 and the X4 of programmable logic controller (PLC) PLC connect simultaneously; Right of second solenoid valve of substandard products screening cylinder is connected, and pressurized air gets into the rodless cavity that screens cylinder through the right position of second solenoid valve, promotes piston advances forward; Piston rod drives the V-type pawl of front end the substandard products brake block is released travelling belt, and brake block falls into the substandard products retracting device.Travelling belt continues operation and gets into the next circulation that detects.
Show through experiment; Adopting brake block to detect control system controls the quality of brake pad checkout equipment; Can detect the substandard products brake block that contains the cavity effectively, also shorten the production cycle of brake block simultaneously to a great extent, obtain good economic benefits.
This intellecture property of primary enforcement that all are above-mentioned is not set restriction this new product of other forms of enforcement and/or new method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (10)
1. a quality of brake pad detection control apparatus is characterized in that, comprising:
Industrial computer is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room;
The brake block transfer unit, it is used for said brake block to be detected is transported to the detection position of said soundproof room;
The substandard products screening part, it is used for the brake block that has quality problems is put into the substandard products exclusion zone;
The audio frequency generation part, it is used to make said brake block to be detected to produce sound signal;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); Be used for controlling said audio frequency generation part through input/output signal; Said brake block transfer unit; The work of said substandard products screening part realizes that said brake block to be detected correct detection position in said soundproof room carries out quality testing, produces sound signal;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
2. quality of brake pad detection control apparatus as claimed in claim 1 is characterized in that: said brake block transfer unit further comprises:
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for the detection position of said brake block vertical transport to be detected to said audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, said brake block to be detected are transported to the detection position at said audio frequency generation part place;
Air compressor, it is used to and pushes away cylinder on said power is provided;
The brake block position detection component; It is used to detect said brake block to be detected whether in the appropriate location of said soundproof room and in the detection position at said audio frequency generation part place; And give said programmable logic controller (PLC) (PLC) with information feedback; By the operation of said travelling belt stepper motor of said programmable logic controller (PLC) (PLC) control and said first solenoid valve, so control said travelling belt and said on push away cylinder said brake block to be detected accurately be transported to the detection position that said audio frequency generation part belongs to.
3. according to claim 1 or claim 2 quality of brake pad detection control apparatus; It is characterized in that; Said substandard products screening part further comprises substandard products screening cylinder, second solenoid valve and is used to the air compressor that said substandard products screening cylinder provides power; Through said industrial computer said brake block to be detected is carried out quality testing, when substandard products occurring, said industrial computer is given said programmable logic controller (PLC) (PLC) with signal feedback; By the break-make of said second solenoid valve of said programmable logic controller (PLC) (PLC) control, and then control said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone.
4. like the described quality of brake pad detection control apparatus of claim 1 to 3, it is characterized in that said audio frequency generation part comprises:
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position.
5. like the described quality of brake pad detection control apparatus of claim 1 to 4, it is characterized in that said audio collection device adopts the electret vibrating membrane to gather sound.
6. like the described quality of brake pad detection control apparatus of claim 1 to 5; It is characterized in that; Said brake block position detection component is preferably 3; The position of the first brake block position detection component is positioned at said soundproof room, and the position of the second brake block position detection component is positioned on the said audio frequency generation part, and the position of the 3rd brake block position detection component is positioned at said substandard products screening cylinder front side.
7. like the described quality of brake pad detection control apparatus of claim 1 to 6; It is characterized in that; Said number of knocking hammer and said electromagnet is preferably 6-8, and through this 6-8 electromagnet being carried out order break-make electricity, the order of utilizing its adhesive realization to knock hammer is knocked.
8. a quality of brake pad detection control apparatus is characterized in that, comprising:
Industrial computer is used for the sound signal of audio collection device collection is carried out analyzing and processing, compares with standard audio, judges the quality of said brake block to be detected;
Soundproof room carries out the quality testing of said brake block to be detected in said soundproof room;
Travelling belt, it is used for said brake block horizontal feed to be detected is gone into the appropriate location of said soundproof room;
The travelling belt stepper motor, it is used to said travelling belt driving force is provided;
On push away cylinder, it is used for the detection position of said brake block vertical transport to be detected to audio frequency generation part place;
First solenoid valve, the break-make through said first solenoid valve of said programmable logic controller (PLC) (PLC) control realize pushing away on said the rising and the decline of cylinder, and said brake block to be detected is transported to the detection position;
Substandard products screening cylinder, it is used for the brake block that has quality problems is transported to the substandard products exclusion zone;
Second solenoid valve, the break-make through said second solenoid valve of said programmable logic controller (PLC) (PLC) control and then control said substandard products screened cylinder and will exist the brake block of quality problems to put into the substandard products exclusion zone;
Air compressor, it is used to and pushes away cylinder on said and said substandard products screening cylinder provides power;
The first brake block position detection component is used to judge that whether said travelling belt send into said brake block to be detected the assigned address of said soundproof room;
The second brake block position detection component is used to judge whether the said push cylinder that goes up sends said brake block to be detected into the detection position that said audio frequency generation part belongs to;
The 3rd brake block position detection component is used to detect the position that whether has substandard products to arrive its place;
Electromagnet, it is used to realize knocking the motion of hammer, through controlling said the knocking the time that hammer knocks of break-make control of said electromagnet;
Knock hammer, it is used to knock said brake block to be detected, thereby produces audio frequency;
Knock the hammer support, it is a U type groove shape, and said electromagnet is installed in the U type bottom portion that said U type knocks the hammer support;
Knock hammer support linear stepping motor, it knocks under the drive of hammering support into shape said through the said hammer that knocks of the signal controlling that receives said programmable logic controller (PLC) (PLC), realizes the adjustment of position;
The audio collection device, it is used to gather the sound signal that said audio frequency generation part produces and sends it to said industrial computer and carries out analyzing and processing;
Programmable logic controller (PLC) (PLC); Be used for through input/output signal control the first brake block position detection component, the second brake block position detection component, the 3rd brake block position detection component, the operation of knocking hammer support linear stepping motor, electromagnet, first solenoid valve, second solenoid valve, travelling belt stepper motor realizes that said brake block to be detected correct detection position in said soundproof room carries out quality testing; Produce sound signal; Signal is passed to said audio collection device, and accept signal from said industrial computer;
Said programmable logic controller (PLC) (PLC) also is used to receive the Quality Feedback signal that said industrial computer produces, and controls the screening of said quality of brake pad.
9. adopt each described quality of brake pad detection control apparatus of claim 1 to 8 to carry out the method that quality of brake pad detects, it is characterized in that, comprising:
The first step through careful processing, obtains to meet the standard brake block of industrial requirement, adopts said quality of brake pad detection control apparatus to gather its audio frequency, obtains the scope of standard audio;
Second step; Through brake block to be detected being conveyed into said quality of brake pad detection control apparatus; Through the audio frequency of relatively its generation and the audio frequency of said standard brake block; If the audio frequency of said brake block to be detected is lower than the audio frequency of said standard brake block, then explain to contain porosely in the said brake block to be detected, be substandard products.
10. each quality of brake pad detection control apparatus of claim 1 to 8 or the described quality determining method of claim 9 are made the application in the process at vehicle.
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Application publication date: 20120418 |