CN106404606B

CN106404606B - Concrete coagulating time measurement device

Info

Publication number: CN106404606B
Application number: CN201610825613.8A
Authority: CN
Inventors: 诸华丰; 邱伟明
Original assignee: Ningbo Yide Instrument Technology Co Ltd
Current assignee: ZHOUSHAN DAOLONG TECHNOLOGY Co.,Ltd.
Priority date: 2016-09-18
Filing date: 2016-09-18
Publication date: 2019-02-19
Anticipated expiration: 2036-09-18
Also published as: CN106404606A

Abstract

Concrete coagulating time measurement device provided by the invention, there is positioning to place on the platform [18] of measurement platform of test specimen tube, there are three-dimensional manipulating bracket [14] on measurement platform, injection stylus holding head [5] is rack-mount, and injection stylus [1] is on using the front/rear preparation frame [2] for being placed on measurement platform.There is computer system control three-dimensional manipulating bracket that holding head is made to implement the injection frequency and the progress injection operation of injection point of relatively prepared frame pick-and-place stylus and opposite test specimen tube as required, and carries out control and first, final setting time judgement automatically.Compared with prior art, the present invention provides a kind of concrete coagulating time measurement devices for being fully automated operation, to guarantee that penetrating speed is accurate, penetrating power by force snesor is sampled automatically, recorded, fault is avoided to influence the accuracy of test data, judgement can be calculated automatically for measurement result and process, it, can be without artificial on duty especially with the automatic replacement of injection stylus.

Description

Concrete coagulating time measurement device

Technical field

The present invention relates to a kind of concrete coagulating time measurement devices, also referred to as " injection resistance meter ", are a kind of surveys Determine the experimental rig of concrete initial set time and final setting time.

Background technique

Concrete coagulating time refers to time of the concrete mix from initial set to final set, is to measure concrete coagulation performance An index, preparation to concrete mix and application are significant.It is " general according to National Standard of the People's Republic of China Logical concrete mixture characteristic test method standard " (GB/T 50080) regulation, the so-called presetting period refers to concrete self-watering Mix plays the time spent in when mortar penetration resistance reaches 3.5MPa, and final setting time refers to that concrete self-watering mix plays mortar The time spent in when penetration resistance reaches 28MPa.

The national standard alsies specify the measurement device and measuring method of the two times, wherein basic group of measurement device At including: 1, injection stylus: the injection partial shape of injection stylus is cylindrical body, and one group 3 pieces, bearing area is respectively 100mm²、50mm²、20mm²；2, stylus injection mechanism: being usually the pressure mechanism being made of lever compression bar or lead screw compression bar；3, Penetrating power device for measuring force: mechanically or electrically platform balance；4, test specimen tube: the container of detected concrete mortar is loaded.

The basic step of measurement method includes: 1, by concrete mix mixed concrete, record plus water moment, the moment To test initial time；2, by the mortar after the coarse aggregate (stone fraction) for sifting out mixture with standard screen by side as defined in standard Method is put into test specimen tube, one group totally 3 test specimen tubes form 3 samples；3, it every 1 penetration resistance of measurement in 0.5 hour, is closing on Just, measurement number can be increased when final set；4, " penetration resistance-time " curve is drawn；5, initial set is determined by linear regression method Time and final setting time.The method and step of penetration resistance is wherein measured every time are as follows:

I. mortar specimen cylinder is placed on analyzer；

Ii. stylus end is contacted with mortar surface；

Iii. so that stylus is passed through people's mortar 25 ± 2mm depth in 10 ± 2s, record injection pressure, be accurate to 10N；

Iv. minute is recorded, 1min is accurate to；

V. penetration resistance is calculated:f = P/A；WhereinPFor the injection pressure (unit N) measured,AFor cutting for injection stylus Area (unit mm²),fFor penetration resistance (units MPa, penetration resistance are habit term, and physical concept is injection intensity).

In addition, condensing situation according to mortar in continuous mode in due course, it is desirable that the penetration resistance range of according to the form below replaces survey Needle, stylus be by collet or screw-threaded coupling in stylus injection mechanism.

Since said determination device is there are problems that some being difficult to overcome by manually-operated.Firstly, standard provides: Penetrating speed requires " stylus is equably made to pass through people 25 ± 2mm of mortar depth in 10 ± 2s ".Due to the intensity of detected concrete It is being among variation, even if very conscientious and experienced operator, it is also difficult to while accurately controlling injection time and depth Degree, it is more difficult to accomplish " uniform ", therefore unavoidably generate measurement error；Have operator again inevitably and can neglect or attention not Enough concentrate and lead to maloperation, misread, the accidents such as misdescription.Secondly, the every 0.5h measurement of standard requirements is primary, to normal concrete Speech, usual presetting period are no less than 45min, and final setting time is no less than 10h, prolonged METHOD FOR CONTINUOUS DETERMINATION, need to arrange more people into Row, causes personnel cost higher.In addition, measurement will carry out drawing curve and calculating every time, the needle exchange time and whether increase survey Determining number all is based on calculating, so needing skilled operation personnel that could be competent at.

Summary of the invention

In view of the above deficiencies, the technical problem to be solved by the present invention is to which computer technology is substituted manual operation, especially It is the connection type for changing stylus and stylus injection mechanism, so that providing a kind of controlled by computer carries out the mixed of full automatic working Solidifying soil setting time measurement device.

Concrete coagulating time measurement device provided by the invention, including injection stylus, stylus injection mechanism, penetrating power are surveyed Measure device and test specimen tube；Further include:

1. measuring platform

1.1. measurement platform has a platform, and in measurement, test specimen tube positioning is placed on the platform；

1.2. measuring has the bracket for making the three-positional fix operation comprising vertical lift relative to platform, injection on platform Stylus holding is rack-mount to be made on the unit of three-dimensional localization；

1.3. measuring on platform has injection stylus preparation frame, and injection stylus is placed on prepared frame using front/rear；

1.4. injection force measuring device is mounted in penetrating power transmitting mechanical path；

2. computer system

2.1. the input mechanism of computer system；

2.1.1. there are keyboard and/or touch screen, for various parameters to be manually entered and select various conditions, operational order, Carry out interpersonal interaction；

2.1.2. there is pressure sensor, for incuding injection pressure and inputting computer；

2.2. the output mechanism of computer system, for showing and/or printing the various parameters and result of continuous mode；

2.3. the storing mechanism of computer system, for storing default or input spatial position coordinate parameters, operation control Various parameters, operational formula, test data and result in parameter processed, measurement process；

2.4. the processing mechanism of computer system；

2.4.1. space control element controls each list of three-dimensional localization mechanism of bracket according to the space position parameter of storage Member is mobile, and stylus is made to hold head to taking, putting stylus in stylus preparatory stage and stylus is moved to mortar surface in sample to be tested cylinder Test position；

2.4.2. injection control unit is moved according to each state modulator vertical cell of the depth of penetration, speed, time of storage It is dynamic, so that stylus is equably passed through the depth that people's mortar determines within the determining time；

2.4.3. penetration resistance sampling unit: connection injection force measuring device carries out penetration resistance in injection operation Continuous sampling, and store data into the storing mechanism of computer；

2.4.4. data processing unit calculates the penetration resistance measured every time according to the data of storage, closes on first, final set Time draws curve and determines presetting period and final setting time；

2.4.5. testing time control unit, according to the testing time of storage or meter it is counted close on just, final setting time and First, final setting time measurement frequency data are closed on, start measurement every time, and determine the termination time of current test；

2.5. the executing agency of computer system is the drive motor controller of three-dimensional localization mechanism each unit in bracket, Receiving space control unit instruction operation, wherein vertical lift drive motor controller also receives injection control unit instruction fortune Row.

Concrete coagulating time measurement device provided by the invention has the stylus comprising stylus injection mechanism, placement stylus Preparation frame and place test specimen tube platform measurement platform, there is in stylus injection mechanism stylus to hold head through three-dimensional adjusting mechanism and flat Platform connection.The space movement of stylus injection mechanism and continuous mode are controlled with computer system, to stylus penetration resistance It is sampled, and operation is carried out to measurement result.In control, by pre-depositing or being manually entered to three pieces of styluses in preparation The spatial position coordinate and minute, examination of spatial position coordinate and three test specimen tubes and mortar surface on platform on frame It tests process and data processing algorithm is set, set the control by respectively tieing up mobile unit to three-dimensional localization mechanism according to these Complete the operations such as stylus replacement, measurement preparation, injection test.Compared with prior art, the present invention provides a kind of fully automated Change the concrete coagulating time measurement device of operation, to guarantee that penetrating speed is accurate, penetrating power is adopted automatically by force snesor Sample, record avoid maloperation, misread, misdescription, prevent to operate that operator is lack of standardization, the situations various aspects such as half-hearted guarantee examination The accuracy for testing data can calculate judgement for measurement result and process automatically, especially have the automatic replacement of injection stylus, It can be without artificial on duty.

The three-dimensional localization mechanism is to be combined to constitute by planar positioning mechanism and vertical lifting unit, wherein putting down Face two-dimensional localization mechanism is to be moved forward and backward unit and move left and right unit combination to constitute either rotary unit and move radially list Member combination is constituted.

There is spatial position positioning unit in the input mechanism of the computer system, for determining that injection stylus holds head institute In spatial position coordinate；The spatial position positioning unit is position sensor or base position positioning device and stepping position Move the combination of driving counting device.

The injection stylus is made of injection section, positioning section；Injection section is cylindrical body, highly greater than pre-provisioning request injection Depth, area of section are determined by pre-provisioning request；Positioning section is the cylinder that injection section upwardly extends, and holds head cooperation with injection stylus Play the role of the two-dimensional localization of the plan-position of stylus；There are also upper and lower positioning surfaces on positioning section, and upper and lower positioning surface is axial throwing Shadow area is respectively directed to upper and lower face greater than positioning section section, holds the upper and lower position that stylus is played in head cooperation with injection stylus Positioning action.

The injection stylus holds head and is made of upper layer and lower layer prong like, hold the upper layer prong like of head downside, The upside of lower layer's prong like cooperates with the upper and lower positioning surface of injection stylus respectively, realizes the positioning of stylus upper and lower position；Simultaneously Holding head, the prong shape of prong like and the shape of stylus positioning section cylinder cooperate up and down, position injection stylus holding head Section makes stylus in vertical state after pitching combination, realizes the positioning to injection stylus plan-position；It holds head and plays stylus Three-dimensional localization effect, while hold head upper layer prong like downside and injection stylus upper positioning surface cooperation also act as application Downward injection pressure transmits the effect of the upward penetration resistance from injection stylus in other words.

A horizontal plane on the downside of holding head upper layer prong like, the upper end of lower layer's prong like have supporting point or line or Face, the support point, line, surface or their combination form a horizontal support surface；The upper and lower positioning surface of stylus is all and stylus axis The vertical plane of line, and the supporting surface of the distance between two positioning surfaces and upper layer prong like underside plan and lower layer's prong like The distance between make clearance fit.

It is prominent that the prong width direction side of the prong like is equipped with elastic card, when blocking prominent pop-up formed between prong bottom The slot vacancy of one receiving positioning section, elastic card is prominent to limit the width outside prong bottom, and prevention is caught in prong bottom Positioning section sliding.

Another scheme, the prong bottom are embedded with magnet, and the upper positioning section of positioning surface above section is magnetic on stylus Material production is adsorbed after combining stylus with holding head and limits its injection posture.

Adaptable therewith, the stylus preparation frame has upper positioning plate and lower pallet, have on upper positioning plate locating notch or Location hole, wherein the direction of locating notch is intersected when replacing stylus with holding head prong direction, and stylus is placed on preparation frame When its lower end be supported on lower pallet, the cooperation of the positioning section of locating notch bottom or location hole and stylus on upper positioning plate is matched Coincidence is set in positioning section and is held other than the cooperation section of head upper layer and lower layer prong like；Coincidence should be matched by wherein using when locating notch The cooperation section of head upper layer prong like or more or lower layer's prong like cooperation section are set in positioning section and held hereinafter, with positioning The cooperation position in positioning section and holds head lower layer prong like cooperation section or less when hole.

When the upper positioning plate uses locating notch, locating notch width direction side is equipped with elastic card and dashes forward, and blocks prominent bullet The slot vacancy of a receiving positioning section is formed when out with indentations bottom, elastic card is prominent to limit outside locating notch bottom section Width, prevent be caught in locating notch bottom positioning section sliding.

Another scheme, when using locating notch on the positioning plate, locating notch bottom is embedded with magnet, on stylus with it is fixed The part of position notch cooperation makes of magnetic material, is adsorbed after combining stylus with preparation frame and limits its ready position.

Have on the lower pallet with locating notch on positioning plate on same longitudinal surface sliding slot or with positioned on positioning plate The coaxial positioning prop hole in hole.

The positioning prop hole is blind hole either through-hole, have on the lower positioning section of the injection stylus when being through-hole end face to Under step.

Concrete coagulating time measurement device provided by the invention when needing replacing injection stylus, carries out as follows:

1. taking stylus from preparation frame:

1.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to Holding head spatial position is moved on to the spatial position of the stylus to be changed saved in memory by the mobile combination for crossing three-dimensional mobile unit Side, at this time hold head prong alignment stylus positioning section and height and position be upper layer prong like on stylus positioning surface with On, lower layer's prong like is under stylus below positioning surface；

1.2. the positioning section that the prong for holding head is directed at stylus is moved into and is made along prong by planar mobile unit Prong bottom and stylus positioning section cooperate；

1.3.A. preparing positioning surface on frame, using location hole, head will be held by, which being moved up by vertical lifting unit, mentions From preparation frame；

1.3.B. prepare positioning surface on frame makes stylus along preparation using locating notch by planar mobile unit The locating notch of frame removes preparation frame；Or hold the cooperation position of head and stylus and be located above upper positioning surface, by vertical Lifting unit, which moves up, will hold head lift-off preparation frame.

2. stylus is put into prepared frame:

2.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to The preparation frame of the stylus to be placed saved in memory is shifted in holding head spatial position by the mobile combination for crossing three-dimensional mobile unit Spatial position；Wherein

2.1.A. it prepares positioning surface on frame and uses location hole,

2.1.A.1 stylus lower end is moved to the coaxial top of location hole；

2.1.A.2 location hole is inserted into stylus lower end by vertical lifting unit to support until by lower pallet；

2.1.A.3 will hold head by planar mobile unit is moved away from prepared rack position along prong opposite direction.

2.1.B. it prepares positioning surface on frame and uses locating notch,

2.1.B.1. stylus is moved to positioning section and is directed at upper positioning plate locating notch, stylus lower end and lower pallet support Xiang Qi；

2.1.B.2. stylus is made to move into preparation frame along locating notch by planar mobile unit；

2.1.B.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction；

2.1.C. positioning surface is using locating notch on prepared frame and the cooperation position of holding head and stylus is on upper positioning surface Side, by step 2.1.B. progress or

2.1.C.1 stylus lower end is moved to stylus in the coaxial top of preparation frame placement location；

2.1.C.2 placement location is inserted into stylus lower end by vertical lifting unit to support until by lower pallet；

2.1.C.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction.

Another scheme, the holding head is a plate body, there is prong or sets of holes, the installation of plate body lower end surface on the plate body Having has sets of holes on permanent magnet or electromagnet or the plate body, plate body lower end surface is equipped with electromagnet；The stylus is at least thereon Positioning surface is magnetic material production；The shape in the section of the prong bottom shape and sets of holes and the positioning section section of injection stylus Shape cooperates the two-dimensional localization for playing the role of stylus plan-position；When preparation frame uses locating notch, the prong and preparation frame Locating notch intersection.So-called sets of holes are the through-hole extended vertically upwards from plate body lower end surface or blind hole.

The power control connection of the electromagnet in computer systems, there is electromagnet control in computer disposal mechanism Unit processed issues on-off according to whether holding head spatial position and stylus spatial position are overlapped to electromagnet power supply control device Instruction.

Concrete coagulating time measurement device provided by the invention, for the holding head for being equipped with magnet or electromagnet, When needing replacing injection stylus, carry out as follows:

1. taking stylus from preparation frame:

1.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to Holding head spatial position is moved on to the spatial position of the stylus to be changed saved in memory by the mobile combination for crossing three-dimensional mobile unit； Wherein

1.1.A. it holds head plate body and uses prong,

1.1.A.1. head prong alignment stylus positioning section, plate body lower end and survey will be held by passing through planar mobile unit Positioning surface is contour on needle gap；

1.1.A.2. head will be held along prong immigration preparation rack position, until positioning by continuing through planar mobile unit Section is caught in prong, uses the unlatching electricity of electromagnet automatically with magnetic attraction using the plate body lower end surface of permanent magnet and stylus at this time Magnet makes plate body lower end surface and stylus with magnetic attraction；

1.1.A.3. head will be held by vertical moving unit and obtains stylus along the upward lift-off of axis；It is fixed that preparation frame uses Position notch, or head will be held by planar mobile unit and be moved away from acquirement stylus along locating notch；

1.1.B. it holds head plate body and uses sets of holes,

1.1.B.1. headgear axially bored line will be held by planar mobile unit and is directed at stylus axis；

1.1.B.2. head will be held by vertical moving unit and stylus positioning section is inserted in sets of holes to touching downwards；

1.1.B.3. electromagnet is opened, stylus is sucked；

1.1.B.4. prepared rack position is moved upward away from for head is held by vertical moving unit in the axial direction, obtains survey Needle；Preparation frame is using locating notch, or will hold head by planar mobile unit and be moved away from acquirement survey along locating notch Needle.

2. stylus is put into prepared frame:

2.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to The preparation frame of the stylus to be placed saved in memory is shifted in holding head spatial position by the mobile combination for crossing three-dimensional mobile unit Spatial position, and stylus lower end is moved to above the axis of the prepared predetermined placement location of frame stylus；

2.1.1 predetermined placement location will be inserted under stylus lower end by vertical lifting unit to support until by lower pallet；

2.1.2.A. head plate body is held using prong, and head will be held along prong negative side by planar mobile unit To being moved away from prepared rack position；Using electromagnet or after closing electromagnet by vertical lifting unit will hold head lift-off；

2.1.2.B. head plate body is held using sets of holes, closes electromagnet, and head will be held along axis by vertical moving unit Line direction lift-off preparation rack position；

2.2. prepare positioning surface on frame using locating notch or computer system to three-dimensional localization mechanism each unit The controller of driving motor issue driving instruction, shifted to by the mobile combination of three-dimensional mobile unit by head spatial position is held The spatial position of the preparation frame of the stylus to be placed saved in memory, and stylus is moved to positioning section alignment prong, stylus Lower end and lower pallet support are mutually neat；

2.2.1 stylus is made to move into preparation frame along locating notch by planar mobile unit；

2.2.2.A. head plate body is held using prong, and head will be held along prong direction by planar mobile unit It is moved away from prepared rack position；Using electromagnet or after closing electromagnet by vertical lifting unit will hold head lift-off；

2.2.2.B. head plate body is held using sets of holes, closes electromagnet, and head will be held along axis by vertical moving unit Line direction is moved away from prepared rack position.

Detailed description of the invention

Fig. 1 is the main view of a stylus embodiment in the present invention, in figure: 1- stylus, the upper positioning section of 1a-, and 1b- has up and down calmly The positioning power transmission section of plane, 1c- stylus ontology；

Fig. 2 is the structure chart that a stylus preparation frame combines embodiment with stylus in the present invention, and Fig. 3 is the top view of Fig. 2, figure In: 1- stylus, 2- preparation frame, 3- card is prominent,

Fig. 4 is a structure chart for holding head in the present invention, in figure: 1- stylus, 4- pressure sensor, 5- hold head, 31- handle It is prominent to hold head card, 5a- supporting spring；

Fig. 5 be in the present invention another stylus with prepare frame in Fig. 2 and combine the structure chart of embodiment, in figure: 2- preparation frame, 11- stylus two, positioning section on 11a- stylus two, the lower positioning section of 11aa- stylus two, 11b- stylus two have the positioning of upper and lower positioning surface Power transmission section, two ontology of 11c- stylus；

Fig. 6 is the structure chart that another stylus preparation frame combines embodiment with stylus in the present invention, and Fig. 7 is the top view of Fig. 6, Fig. 8 is another structure chart held when head picks and places stylus from this example, and in figure: 1- stylus, 3- card are dashed forward, 21- preparation frame, 41- Pressure sensor two, 51- hold head two；

Fig. 9 is a kind of structure chart of the holding head using permanent magnet in the present invention, and the bottom view that Figure 10 is Fig. 9 (survey by virtualization After needle), in figure: 1- stylus, 6- permanent magnet, 52- permanent magnetism hold head plate body；

Figure 11 is a kind of structure chart of the holding head using electromagnet in the present invention, in figure: 1- stylus, 7- iron core, 8- line Circle, 53- electromagnetism hold head plate body；

Figure 12 is the structure chart of another holding head using electromagnet in the present invention, in figure: 12- stylus three, 71- iron core Two, 81- coil two, 54- electromagnetism hold head plate body two；

Figure 13 is the main view of one embodiment of the invention, and Figure 14 is the top view of Figure 13, in figure: 1- stylus, 2- preparation frame, 4- pressure sensor, 5- hold head, 9- injection device for exerting, and 10- cantilever (vertically moves unit), to mobile unit before and after 13- Driving device, 14- door frame, 15- or so are tried to mobile unit driving device, 16- lead screw, 17- feed screw nut, 18- platform, 19- Sample cylinder.

Specific embodiment

1, as shown in Figure 1, stylus 1 has stylus ontology 1c, stylus ontology has upwardly extended positioning power transmission section 1b and upper positioning Section 1a, positioning power transmission section have upper and lower positioning surface.Wherein upper positioning section and stylus ontology are coaxial cylindrical bodies, stylus ontology it is straight Diameter is changed by predetermined dimension and upper positioning section is constant, is cooperated convenient for holding the prong of head upper layer prong like with it.In addition, Stylus ontology and positioning power transmission section coupling part also double as lower positioning section, and in production, its diameter can be a determining value, Being positioned such that power transmission section or less partially is the cylindrical body of a variable diameter.This example is as a kind of most specification, most beautiful structure, in fact Its upper and lower positioning section and stylus ontology are all not necessarily to be cylindrical shape on border, are also possible to on-circular cross-section cylinder, such as Prism, cylindroid etc..Positioning power transmission section mainly provides pressure and resistance required for positioning surface up and down and transmitting injection stylus, because Connection and transmitting penetrating power are only played in part between positioning surface above and below this positioning power transmission section, accordingly up and down can between positioning surface With there are many selections, such as single-column connection, multicolumn connection, framework connection.

2, as shown in Figure 2,3, there is a " Fang " shape preparation frame 2 being made of upper positioning plate, lower pallet and longitudinal wall, preparation Frame is combined in stylus with stylus 2 in readiness.It is pre- that this is that a kind of stylus ontology (as lower positioning section) by such as Fig. 1 is placed on Scheme on standby frame.The upper positioning plate of preparation frame has locating notch, and lower pallet has the blind hole coaxial with locating notch bottom.It places When stylus ontology be caught in prepared frame and putting down from locating notch its lower end made to be inserted into blind hole, lower positioning section (stylus our department with it is lower fixed Part between plane) cooperate in locating notch bottom.One hoodle card prominent 3, hoodle bullet are installed in locating notch bottom side The slot vacancy cooperated with positioning section under stylus is limited to when out with locating notch bottom in the axial direction, after being caught in stylus It does not fall out.

For the placement for adapting to different size stylus, the diameter using positioning section is identical feature, and hoodle card is prominent preferably to pacify Mounted in the locating notch side of upper positioning plate.

Perhaps preparation frame is made with non-magnetic material at locating notch bottom wall or sliding slot inner end wall or sliding slot inner end bottom On one block of magnet is installed, stylus corresponding position then with for example iron work of magnetic material, makes stylus be attracted and stablize.

Alleged locating notch bottom and prong bottom in the present invention, refer to the axis locating notch parallel with stylus axis or The part that the two sides longitudinal wall of person's prong is connected in inner end, alternatively stylus moves inward in prong or locating notch The part that the when of falling bottom is relied on.

On preparation frame, the distance between positioning plate upper surface and positioning surface under stylus are not less than institute's adapted on preparation frame The thickness for holding head lower layer prong like is constituted to translate and be hindered after cooperating holding head prong and stylus to holding head.

3, as shown in figure 4, a " Fang " shape stylus being made of upper layer and lower layer prong like and longitudinally connected wall holds head 5, it is installed together with pressure sensor 4, and configuration state when it holds stylus 1 can be seen from figure.In this example, survey The positioning surface up and down of needle positioning power transmission section is parallel to each other and perpendicular to the axis, and the inside for holding the prong like up and down of head is flat Face is also to be parallel to each other and perpendicular to the axis.Between the distance between upper and lower inner side plane of the distance between upper and lower positioning surface is made Gap cooperation.

This example holds being made of two parts for head, first is that upper layer prong like and the pressure sensor upwardly extended are installed Seat formed a solid block, it is another be the back segment of lower layer's prong like be folded up to be formed longitudinal wall and be installed on solid block part Supporting spring 5a.Upper layer prong like is more thick and solid because of to transmit penetrating power, by pressure sensor mounting base institute on the upside of prong It covers and forms a notch for having top.Described prong is the strip notch for having the wall parallel with axis, and prong bottom and stylus are fixed up and down Position section cooperation, the interior holding head card constituted embedded with hoodle prominent 31 of the notch wall of upper layer prong like, its axial direction when hoodle pops up Projection is limited to the slot vacancy of one with the cooperation of upper positioning section with indentations bottom, does not fall out after being caught in stylus.

The prong bottom for holding head upper layer prong like can also be installed to magnet, and to substitute, hoodle card is prominent or other are elastic Fastening device, stylus corresponding position then with for example iron work of magnetic material, make stylus be attracted and stablize.

4, as shown in figure 5, another stylus structure, stylus 2 11 are passed by positioning section 11a, the positioning of stylus two on stylus two Power section 11b, stylus two lower positioning section 11aa, the two coaxially connected composition of ontology 11c each section of stylus, wherein each section is round Cylinder.The lower positioning section of stylus two is that diameter is greater than two ontology of stylus, and there is downward end face in junction.Have one by upper positioning plate, The " Fang " shape preparation frame 211 that lower pallet and longitudinal wall are constituted, preparation frame are combined in stylus two with stylus 2 11 in readiness. Positioning plate has location hole on preparation frame, there is the through-hole coaxial with location hole on lower pallet, and location hole and through-hole are pitched with upper layer respectively Shape structure and two ontology of stylus make clearance fit, and the downward end face in two or less positioning section lower end of stylus is supported on lower pallet.

5, as shown in Figure 6,7, there is a " Fang " shape preparation frame 21 being made of upper positioning plate, lower pallet and longitudinal wall, in advance Standby frame is combined in stylus with stylus 1 in readiness.This is a kind of side that the entire stylus such as Fig. 1 is placed in prepared frame Case.The upper positioning plate of preparation frame has locating notch, and lower pallet has sliding slot parallel with locating notch and in the same vertical plane.It puts Upper positioning section end and stylus lower end are caught in prepared frame from locating notch and sliding slot respectively when setting, cooperation in locating notch bottom and Sliding slot inner end.One hoodle card prominent 3 is installed in sliding slot inner end side, be limited to when hoodle pops up with sliding slot inner end wall one with The slot vacancy of stylus lower end cooperation, does not fall out after being caught in stylus.

In preparation frame, the distance between positioning plate and positioning surface on stylus are not less than the holding head of institute's adapted on preparation frame The thickness of upper layer prong like makes to hold head prong and do not constitute to translate to holding head with preparation frame after stylus cooperation to hinder.

6, as shown in figure 8, one holds the state for picking and placing stylus 1 on the preparation frame 21 shown in Fig. 6 of head 51.This example holds head It is the " Fang " shape object being process with a metal block, upper and lower prong like holds essentially identical a, pressure sensor with example 3 41 mounting base setting is in side, therefore the main distinction of the two is that this example upper layer prong like is passed without the pressure upwardly extended Sensor mounting base, the pick-and-place of stylus on the preparation frame introduced especially suitable for such as example 5.

7, a kind of as shown in Figures 9 and 10, holding head 52 applying permanent magnet is a plate body for having prong, shape such as accumbency The shape of a hoof.On plate body lower end surface, equal lease makings install three cylindrical permanent magnet iron on the circular arc centered on prong bottom midpoint 6.Three cylindrical permanent magnet iron axis are vertical with plate body lower end surface, and permanent magnet end face and plate body lower end surface are neat.A wherein cylinder Body axis divides in plane in prong, and three permanent magnets is made to be symmetrical with prong.

It can also be installed on stylus on positioning surface with monolith permanent magnetism, but this example infrastructure cost is lower.

8, a kind of as shown in figure 11, holding head 53 applying electromagnet, is a plate body for having sets of holes, and sets of holes are open in plate Body lower end surface.Plate body upper end is compounded with pressure sensor mounting base, therefore sets of holes are blind holes.Sets of holes are the inner holes of annular core 7, Annular core is inlaid on plate body through insulating materials, and iron core end face and plate body lower end surface are mutually neat.Coil 8, line are installed outside iron core Iron core generates magnetic force after circle is powered and positioning surface in the positioning power transmission section of stylus 1 is attracting.

9, as shown in figure 12, another kind applies the holding head 54 of electromagnet, is a cylindrical plate body for having sets of holes, sets of holes Opening is in plate body lower end surface.Pressure sensor mounting base is compounded on plate body, sets of holes upper bottom portion is embedded with electromagnetism through insulating materials Iron two, with 2 71 end face of iron core and plate body lower end surface, mutually neat installation, iron core two are equipped with coil 2 81 to electromagnet two outside.It is matched The stylus 3 12 of set is that upper positioning section is combined into one with positioning power transmission section, and positioning power transmission section is matched with the sets of holes for holding head as gap It closes.Iron core generates magnetic force after coil is powered and 1 upper surface of stylus is attracting.

10, a kind of structure type of concrete coagulating time measurement device, device include measurement platform and computer system.

Platform is measured as shown in Figure 13,14, there is a platform 18, platform is that panel and cabinet are constituted, mounting bracket on platform, branch Frame, which includes: platform two sides, installs a door frame 14 through sliding rail, there is nut 15 on the attachment beam of door frame lower end, and nut cooperation is (left in length It is right) on the lead screw 16 in direction, lead screw end has left and right to mobile unit driving device 17, becomes door frame and moves left and right unit. There is the rack gear in width (front and back) direction on the upper beam of door frame, there is front and back to be mounted on rack gear to mobile unit driving device 13, have One cantilever the upper end is mounted on front and back front and back fixed in mobile unit driving device through upward and downward mobile unit driving device In mobile unit, cantilever is upper and lower (lifting) mobile unit.The driving device that pressed on cantilever is equipped with injection device for exerting 9, injection device for exerting is also that (lifting) mobile unit, injection device for exerting are installed through pressure sensor 4 and hold head 5 up and down.It passes through Enter device for exerting to be driven by pressure driving device, move up and down installed holding head opposing cantilevers when it works, holds The penetration resistance that head is subject to output signal to pressure sensor offer pressure.There are three test specimen tubes for fixed point placement on platform panel 10, panel one end pinpoints preparation frame 2 there are three arrangements, and the spatial position of test specimen tube and prepared frame is holding the movement of head three-dimensional In range.The stylus 1 of three specifications is sequentially placed on prepared frame when being not used.

The computer system (not shown) of device has display and keyboard, is also mounted in the cabinet of computer system Left and right to, front and back to and longitudinal movement cell driving device and injection device for exerting drive set controller, each driving device is all It is stepper motor.On computers, out-put supply end connects each stepper motor for the command input connection of each controller, and pressure passes Sensor accesses computer after digital-to-analogue conversion.Head operation is held to accurately control, is saved in the memory of computer system: a. The plan-position coordinate parameters of three test specimen tubes；B. the height parameter of concrete surface；C. depth of penetration parameter；D. each prepared frame Three-dimensional coordinate parameter；E. the not layout of homogeneous injection point coordinate, labeled as the plan-position seat relative to test specimen tube central point Mark sequence.The each position coordinate parameters refer to the stepper motor for respectively tieing up position with drive control relative to holding head base position Stepping angle angle value label, drive stepper motor that can be combined into one wherein driving upside down and press, according to these parameters when operation It is converted into the spatial position control realized to the rotation command of corresponding stepper motor and hold head operation.

As another control program, can platform and left and right unit, left and right unit and front-and-back unit, front-and-back unit and Upper lower unit, four link positions of upper lower unit and device for exerting installation displacement sensors come determine each unit be mutually shifted away from From to calculate the spatial position for holding head, the space control for holding head is realized in the operation for controlling each mobile unit driving device.

11, it is also connected with the power control of electromagnet in computer systems, it is empty according to head is held by computer Between position whether and it is expected that pick-and-place stylus spatial position overlapping and to electromagnet power supply electronic switch issue on-off instruction.

12, as the replacing structure of bracket, bracket can be a column, be socketed rotary axle box on column, on rotary axle box Horizontal boom is installed, translation mechanism is installed on cantilever, elevating lever is installed, elevating lever lower end is pacified through pressure sensor on translation mechanism Dress holds head.

Bracket can also be a tortuous arm, and an elevating lever is installed in tortuous arm end, and elevating lever lower end is pacified through pressure sensor Dress holds head.

As the structure of three-dimensional driver, can be constituted with lead screw, transmission belt, hydraulic drive mechanism or combining form.

13, concrete coagulating time measurement device can also install stylus on holding head and/or stylus preparation frame respectively Detection sensor, computer determines whether stylus is in corresponding position according to sensor signal, if stylus is not detected, Computer pausing operation simultaneously issues alarm notification.Stylus sensor can be photoelectric sensor, electromagnetic sensor etc..

14, the basic step of apparatus of the present invention measurement method includes:

One, testboard prepares

1. starting computer system, self-check of device is carried out, each mobile unit is returned to home position on bracket；

2. three pieces of styluses are placed on three prepared framves, wherein it is 100mm that No. 1 prepared frame, which puts No. 1 stylus section,²、2 Number preparation frame put No. 2 stylus sections be 50mm², to put No. 3 stylus sections be 20mm to No. 3 preparation framves²。

Two, sample prepares

1. pressing concrete mix mixed concrete, in computer systems input plus water moment, which is to test Begin the time；

2. the mortar after the coarse aggregate (stone fraction) for sifting out mixture with standard screen is put into three identical test specimen tubes Three samples of interior formation, the mortar height in each test specimen tube are identical；

3. three test specimen tubes are put on the position that platform determines, it is denoted as 1 horn, 2 horns, 3 horns.

Three, it measures

I. measurement starting time control

Pick-and-place stylus, injection and calculating successively are carried out to three test specimen tubes after measurement starting,

1. every the primary measurement of starting in 30 minutes from testing initial time；

2. when close on just, final set when, increase the instruction of measurement number as every the primary measurement of starting in 10 minutes；

3. measurement terminates as penetration resistance > 28MPa.

II. needle is picked and placed

1. extracting current needle number in the held needle storage unit of head and from needle exchange from holding respectively after measurement starting Needle number will be used by extracting in the location of instruction, and two needle numbers are compared；

1.A. such as comparison result is identical, then enters injection program；

1.B. such as comparison result is not identical, then puts down stylus on the preparation frame corresponding to current needle number, then from will use needle Stylus is obtained on preparation frame corresponding to number；

Such as current scalp acupuncture number that holds of 1.C. is sky, then directly from will obtain stylus on the preparation frame corresponding to needle number；

2. taking stylus from preparation frame:

2.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to Holding head spatial position is moved on to the spatial position of the stylus to be changed saved in memory by the mobile combination for crossing three-dimensional mobile unit Side, at this time hold head prong alignment stylus positioning section and height and position be upper layer prong like on stylus positioning surface with On, lower layer's prong like is under stylus below positioning surface；

2.2. the positioning section that the prong for holding head is directed at stylus is moved into and is made along prong by planar mobile unit Prong bottom and stylus positioning section cooperate；

2.3.A. preparing positioning surface on frame, using location hole, head will be held by, which being moved up by vertical lifting unit, mentions From preparation frame；

2.3.B. prepare positioning surface on frame makes stylus along preparation using locating notch by planar mobile unit The locating notch of frame removes preparation frame；Or hold the cooperation position of head and stylus and be located above upper positioning surface, by vertical Lifting unit, which moves up, will hold head lift-off preparation frame；

2.4. label storage holds the current needle number of head after extracting successfully.

3. stylus is put into prepared frame:

3.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, leads to The preparation frame of the stylus to be placed saved in memory is shifted in holding head spatial position by the mobile combination for crossing three-dimensional mobile unit Spatial position；Wherein

3.1.A. it prepares positioning surface on frame and uses location hole,

3.1.A.1 stylus lower end is moved to the coaxial top of location hole；

3.1.A.2 location hole is inserted into stylus lower end by vertical lifting unit to support until by lower pallet；

3.1.A.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction.

3.1.B. it prepares positioning surface on frame and uses locating notch,

3.1.B.1. stylus is moved to positioning section and is directed at upper positioning plate locating notch, stylus lower end and lower pallet support Xiang Qi；

3.1.B.2. stylus is made to move into preparation frame along locating notch by planar mobile unit；

3.1.B.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction；

3.1.C. positioning surface is using locating notch on prepared frame and the cooperation position of holding head and stylus is on upper positioning surface Side, by step 2.1.B. progress or

3.1.C.1 stylus lower end is moved to stylus in the coaxial top of preparation frame placement location；

3.1.C.2 placement location is inserted into stylus lower end by vertical lifting unit to support until by lower pallet；

3.1.C.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction；

3.2 be put into will successfully hold afterwards the current needle labelled notation of head for sky.

III. injection

1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, pass through Stylus lower end position is moved on to the current injection coordinate bit of mortar surface in sample to be tested cylinder by the mobile combination of three-dimensional mobile unit It sets；

2. moving down by vertical lifting unit, stylus is equably set to pass through 25 ± 2mm of people's mortar in 10 ± 2s deep Degree；

3. carrying out Time Continuous at equal intervals to injection pressure by pressure sensor in entire penetration process to sample, such as Primary every 0.1s sampling, gained injection pressure value forms the storing mechanism that data sequence is saved in computer after analog-to-digital conversion In；

4, it is moved up by vertical lifting unit, stylus is proposed into test specimen tube；

5, above 1,2,3,4 steps are repeated to the progress injection of next sample to be tested cylinder after completing the injection of a test specimen tube Operation, this injection until completing three test specimen tubes；

6, after completing an injection, the injection point coordinate parameters that space control element more renews in computer system, under making Injection with carried out on former each secondary unduplicated point of injection point.

IV. penetration resistance is calculated

It is carried out 1. calculating with the calculation procedure being stored in computer storage structure, which is description formulaf =P/A's；WhereinPFor the injection pressure (unit N) measured,AFor sectional area (the unit mm of injection stylus²),fFor penetration resistance (units MPa)；Wherein

The each injection pressure value of each samplePDetermination: above save injection operation third step in, by what is saved in memory The mean value calculation sampling number that data sequence time successively extracts setting calculates average value, and (such as every 10 samplings calculate primary average Value), whole sample data sequences are calculated into resulting average value and form average data sequence, then from average data sequence Calculate pressure value of the maximum value as the secondary injectionP；Above-mentioned calculating can also carry out simultaneously in penetration process, that is, work as Continuous sampling number calculates average value immediately and saves when reaching the mean value calculation sampling number of setting, continue sampling when secondary The mean value calculation sampling number that number reaches setting calculates subsequent average value, compares the average value of last time preservation and saves larger For value until completing injection operation, the maximum average value saved is the pressure value of the secondary injectionP。

After the injection of each sample, from when previous current sample injection pressure value storage unit extract injection pressure value into It is single that the calculating of row penetration resistance, gained penetration resistance value and average maximum used measure time marshalling deposit penetration resistance storage In member.

2. supposition closes on first, final setting time

WhenfWhen > 2.5MPa, it is determined as closing on the presetting period, is issued to measurement startup program and measurement time is increased to current sample Number instruction；

WhenfWhen > 25MPa, it is determined as closing on the presetting period, is issued to measurement startup program and measurement number is increased to current sample Instruction.

3. the judgement replacement stylus time:

3.1. it is labeled as sky in current stylus storage unit when test starting, is stored after obtaining No. 1 needle in current needle number The mark data of No. 1 stylus is saved in unit；

3.2. if when previous current samplefNeedle exchange instruction is then stored in the measurement next time of current sample by≤3.5MPa In enabled instruction memory, the mark data of No. 2 styluses will be stored as with needle number；Or it tries again pass through by new stylus number immediately Enter test；

3.3. if when previous current samplefNeedle exchange instruction is then stored in the measurement next time of current sample by≤20MPa In enabled instruction memory, the mark data of No. 3 styluses will be stored as with needle number；Or it tries again pass through by new stylus number immediately Enter test.

Four, measurement result

1. the penetration resistance and time value data group of each sample are extracted into storing mechanism penetration resistance storage unit, " penetration resistance-time " curve is drawn to each sample；

2. determining each sample by linear regression method or " penetration resistance-time " curve-fitting methodf= Presetting period when 3.5MPa andfThe final setting time of=28MPa；

3. the presetting period of pairs of three samples and final setting time carry out arithmetic average respectively, median is obtained；

4. the presetting period of pairs of three samples and final setting time are compared respectively, maximum value and minimum value are obtained；

5. it is compared respectively with the maximum value in presetting period and minimum value with in-between value,

The difference of 5.A. such as maximum value and minimum value and median is less than or equal to the 10% of median, then measurement result is centre Value；

The difference of 5.B. such as maximum value or minimum value and median is greater than the 10% of median, then measurement result is median；

The difference of 5.C. such as maximum value and minimum value and median is greater than the 10% of median, then measurement result is invalid.

12, for being equipped with the holding head of magnet or electromagnet, then picking and placing stylus the step of is:

1. taking stylus from preparation frame:

1.1.A. it holds head plate body and uses prong,

1.1.B. it holds head plate body and uses sets of holes,

1.1.B.3. electromagnet is opened, stylus is sucked；

2. stylus is put into prepared frame:

Claims

1. a kind of concrete coagulating time measurement device, including injection stylus, stylus injection mechanism, injection force measuring device and examination Sample cylinder；Characterized by further comprising:

1. measuring platform

1.2. measuring has the bracket for making the three-positional fix operation comprising vertical lift relative to platform, injection stylus handle on platform Hold rack-mount make on the unit of three-dimensional localization；

The stylus preparation frame has upper positioning plate and lower pallet, has locating notch or location hole on upper positioning plate, stylus is in preparation Its lower end is supported on lower pallet when placing on frame, the positioning section of locating notch bottom or location hole and stylus on upper positioning plate Cooperation, there is the sliding slot with locating notch on positioning plate on same longitudinal surface on lower pallet, or with location hole on positioning plate or The coaxial positioning prop hole in sliding slot bottom；

2. injection stylus

The injection stylus is made of injection section, positioning section；Injection section is cylindrical body, is highly greater than the depth of pre-provisioning request injection Degree, area of section are determined by pre-provisioning request；Positioning section is the cylinder that injection section upwardly extends, and matches with injection stylus holding head and closes Two-dimensional localization to the plan-position of stylus acts on；There are also upper and lower positioning surfaces on positioning section, and upper and lower positioning surface is axis projection Area is respectively directed to upper and lower face greater than positioning section section, plays the upper and lower position of stylus with the holding head cooperation of injection stylus Positioning action；

3. computer system

3.1. the input mechanism of computer system；

3.1.1. there are keyboard and/or touch screen, for various parameters to be manually entered and select various conditions, operational order, carry out Interpersonal interaction；

3.1.2. there is pressure sensor, for incuding injection pressure and inputting computer；

3.2. the output mechanism of computer system, for showing and/or printing the various parameters and result of continuous mode；

3.3. the storing mechanism of computer system, for storing default or input spatial position coordinate parameters, operation control ginseng Various parameters, operational formula, test data and result in number, measurement process；

3.4. the processing mechanism of computer system；

3.4.1. space control element is moved according to the three-dimensional localization mechanism each unit that the space position parameter of storage controls bracket It is dynamic, so that stylus is held head to taking, putting stylus in stylus preparatory stage and stylus is moved to the survey of mortar surface in sample to be tested cylinder Try position；

3.4.2. injection control unit, it is mobile according to each state modulator vertical cell of the depth of penetration, speed, time of storage, make Stylus equably passes through the depth that people's mortar determines within the determining time；

3.4.3. penetration resistance sampling unit: connection injection force measuring device carries out penetration resistance in injection operation continuous Sampling, and store data into the storing mechanism of computer；

3.4.4. data processing unit, according to the data of storage calculate measure every time penetration resistance, close on just, final setting time, It draws curve and determines presetting period and final setting time；

3.4.5. testing time control unit, according to the testing time of storage or meter it is counted close on just, final setting time and close on Just, the measurement frequency data of final setting time start measurement every time, and determine the termination time of current test；

3.5. the executing agency of computer system is the drive motor controller of three-dimensional localization mechanism each unit in bracket, is received Space control element instruction operation, wherein vertical lift drive motor controller also receives the instruction operation of injection control unit.

2. concrete coagulating time measurement device as described in claim 1, it is characterised in that the input machine of the computer system There is spatial position positioning unit in structure, for determining that injection stylus holds head place spatial position coordinate；The spatial position is fixed Bit location is the combination of position sensor or base position positioning device and step-wise displacement driving counting device.

3. concrete coagulating time measurement device as claimed in claim 1 or 2, it is characterised in that the injection stylus hold head by Upper layer and lower layer prong like constitute, the upside of the downside, lower layer's prong like that hold the upper layer prong like of head respectively with injection The upper and lower positioning surface of stylus cooperates, and realizes the positioning of stylus upper and lower position；Positioning surface uses locating notch on preparation frame, When replacing stylus, holds head prong direction and intersect with the locating notch direction；Hold the prong shape of head or more prong like Cooperate with the shape of stylus positioning section cylinder, makes stylus in vertical shape after holding head injection stylus positioning section is pitched combination State realizes the positioning to injection stylus plan-position；It holds head and plays the role of the three-dimensional localization of stylus, while holding the upper of head The downside of layer prong like and the upper positioning surface cooperation of injection stylus also act as and apply downward injection pressure, and transmitting comes in other words From the effect of the upward penetration resistance of injection stylus.

4. concrete coagulating time measurement device as claimed in claim 3, it is characterised in that holding head upper layer prong like Downside is a horizontal plane, and there are supporting point or line or face, the support point, line, surface or their group in the upper end of lower layer's prong like It closes and forms a horizontal support surface；The upper and lower positioning surface of stylus is all the plane vertical with stylus axis, and between two positioning surfaces The distance between distance and upper layer prong like underside plan and the supporting surface of lower layer's prong like make clearance fit；Relatively pre- When standby frame picks and places injection stylus, the cooperation for holding head and positioning section always makes the cooperation position of prepared frame and stylus be in upper and lower two Except layer prong like；For i.e. prepared frame using locating notch, the cooperation position of preparation frame and stylus in positioning section and holds head More than upper layer prong like or lower layer's prong like is hereinafter, preparation frame uses location hole, the cooperation position of preparation frame and stylus In positioning section and hold head lower layer prong like cooperation section or less.

5. concrete coagulating time measurement device as claimed in claim 4, it is characterised in that set on the locating notch or prong It is equipped with that elastic card is prominent or permanent magnet location structure, stylus to be limited in the bottom of locating notch bottom or prong.

6. concrete coagulating time measurement device as claimed in claim 4, it is characterised in that when replacement injection stylus, by following step It is rapid to carry out:

1. taking stylus from preparation frame:

1.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, passes through three-dimensional The mobile combination of mobile unit moves on to the spatial position side of the stylus to be changed saved in memory by head spatial position is held, this When hold the prong alignment stylus positioning section of head and height and position is upper layer prong like on stylus more than positioning surface, lower layer's fork Shape structure is under stylus below positioning surface；

1.2. the positioning section that the prong for holding head is directed at stylus is moved by planar mobile unit along prong and makes prong Bottom and stylus positioning section cooperate；

1.3.A. preparing positioning surface on frame, using location hole, head lift-off preparation will be held by being moved up by vertical lifting unit Frame；

1.3.B. preparing positioning surface on frame determines stylus along preparation frame by planar mobile unit using locating notch Position notch removes preparation frame；When the cooperation position for holding head and stylus is located above upper positioning surface, pass through vertical lifting unit Head lift-off preparation frame will be held by moving up；

2. stylus is put into prepared frame:

2.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, passes through three-dimensional The space of the preparation frame of the stylus to be placed saved in memory is shifted in holding head spatial position by the mobile combination of mobile unit Position；Wherein

2.1.A. it prepares positioning surface on frame and uses location hole,

2.1.A.1 stylus lower end is moved to the coaxial top of location hole；

2.1.A.3 head will be held by planar mobile unit and is moved away from prepared rack position along prong opposite direction；

2.1.B. it prepares positioning surface on frame and uses locating notch,

2.1.B.1. stylus is moved to positioning section and is directed at upper positioning plate locating notch, stylus lower end and lower pallet support are mutually neat；

2.1.C. positioning surface is using locating notch on prepared frame and the cooperation position of holding head and stylus is above upper positioning surface, By step 2.1.B. carry out or

7. concrete coagulating time measurement device as claimed in claim 1 or 2, it is characterised in that the holding head is a plate body, There are prong or sets of holes on the plate body, plate body lower end surface, which is equipped on permanent magnet or electromagnet or the plate body, sets of holes, Plate body lower end surface is equipped with electromagnet；At least positioning surface is magnetic material production to the stylus thereon；Prong bottom shape The two-dimensional localization of stylus plan-position is played the role of in the cooperation of the shape in the section of shape and sets of holes and the positioning section section of injection stylus； When preparation frame uses locating notch, the prong intersects with preparation frame locating notch.

8. concrete coagulating time measurement device as claimed in claim 7, it is characterised in that when needing replacing injection stylus, press Following steps carry out:

1. taking stylus from preparation frame:

1.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, passes through three-dimensional The mobile combination of mobile unit moves on to the spatial position of the stylus to be changed saved in memory by head spatial position is held；Wherein

1.1.A. it holds head plate body and uses prong,

1.1.A.1. head prong alignment stylus positioning section will be held by passing through planar mobile unit, be determined on plate body lower end and stylus Plane is contour gap；

1.1.A.2. head will be held along prong immigration preparation rack position, until positioning section is caught in by continuing through planar mobile unit Prong is made automatically with magnetic attraction using the unlatching electromagnet of electromagnet using the plate body lower end surface of permanent magnet and stylus at this time Plate body lower end surface and stylus are with magnetic attraction；

1.1.A.3. head will be held by vertical moving unit and obtains stylus along the upward lift-off of axis；When preparation frame is lacked using positioning When mouth, head will be held by planar mobile unit and be moved away from acquirement stylus along locating notch；

1.1.B. it holds head plate body and uses sets of holes,

1.1.B.3. electromagnet is opened, stylus is sucked；

1.1.B.4. prepared rack position is moved upward away from for head is held by vertical moving unit in the axial direction, obtains stylus；When When preparation frame uses locating notch, head will be held by planar mobile unit and be moved away from acquirement stylus along locating notch；

2. stylus is put into prepared frame:

2.1. computer system issues driving instruction to the controller of the driving motor of three-dimensional localization mechanism each unit, passes through three-dimensional The space of the preparation frame of the stylus to be placed saved in memory is shifted in holding head spatial position by the mobile combination of mobile unit Position, and stylus lower end is moved to above the axis of the prepared predetermined placement location of frame stylus；

2.1.2.A. head plate body is held using prong, and head will be held by planar mobile unit and be moved away from along prong opposite direction Preparation rack position；Using electromagnet, head lift-off will be held by vertical lifting unit after closing electromagnet；

2.1.2.B. head plate body is held using sets of holes, closes electromagnet, and head will be held along axis side by vertical moving unit To lift-off preparation rack position；

2.2. it prepares positioning surface on frame and uses locating notch, driving motor of the computer system to three-dimensional localization mechanism each unit Controller issue driving instruction, head spatial position will be held by the mobile combination of three-dimensional mobile unit shift in memory and protect The spatial position of the preparation frame for the stylus to be placed deposited, and stylus is moved to positioning section alignment prong, stylus lower end and subiculum Plate support face is mutually neat；

2.2.1 making stylus move into preparation frame along locating notch by planar mobile unit；

2.2.2.A. hold head plate body using prong, by planar mobile unit will hold head be moved away from along prong direction it is pre- Standby rack position；Using electromagnet, head lift-off will be held by vertical lifting unit after closing electromagnet；

2.2.2.B. head plate body is held using sets of holes, closes electromagnet, and head will be held along axis side by vertical moving unit To being moved away from prepared rack position.