CN205982633U

CN205982633U - Positioner

Info

Publication number: CN205982633U
Application number: CN201620994867.8U
Authority: CN
Inventors: 汤旻安; 程海鹏; 李亚宁
Original assignee: Lanzhou Jiaotong University
Current assignee: Lanzhou Jiaotong University
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2017-02-22
Anticipated expiration: 2026-08-31

Abstract

The utility model discloses a positioner, positioner includes sealed cavity and sets up the spy needle holder in sealed cavity, be fixed with probe, connecting rod, proximity switch and ultrasonic ranging probe on the spy needle holder, the connecting rod is fixed visit on the needle holder outlying three -dimensional coordinate frame, proximity switch and ultrasonic ranging probe connection are to single -chip microcomputer control system, and positioning accuracy is high, and the range finding is accurate, and the reliability is high, and the error is little, and the reaction is sensitive, can accurately show that it leave automatic alarm to visit gauge needle.

Description

A kind of positioner

Technical field

This utility model belongs to communication with control technology field and in particular to a kind of positioner.

Background technology

Closed cavity refers to all round closure, the dark airtight cavity in the inside.Probe is attached for measuring closed cavity inwall The sensor of nearly rate of flow of fluid.

Enter the parameter measurements such as trip temperature, humidity and rate of flow of fluid and control closely correlates to social life in closed cavity Work, industrial and agricultural production etc..Some fields, such as Engineering Thermophysics experimentation etc., not only need closed cavity internal probe to have standard Really, the static characteristic such as reliable, also requires the position in closed cavity to probe to be accurately positioned, disconnected to avoid touching probe Or touch curved.Existing closed cavity probe positioning device and its positioning precision are unsatisfactory.

Existing closed cavity probe positioning device is the positioner using draw point at present, as shown in Figure 1.In order to ensure Probe 1 is not rebuffed when testing closed cavity 2 inwall rate of flow of fluid, secures a steel on probe support 3 parallel with probe Pin 4, this draw point protrudes probe 0.5 ~ 1mm.Connecting rod 5 is connected with outside three-dimensional coordinate frame.So, by connecting rod and support, probe Just achieve three-dimensional motion.Meanwhile, one bulb 6 of draw point other end series connection, this bulb is connected with DC source 7 positive pole.Directly The negative pole of stream power supply is then connected with cavity inner wall., with support and connecting rod 5 motor process in closed cavity, draw point is first for probe The inwall of closed cavity first can be encountered, now just form the DC circuit of a closure, therefore bulb can be light, experimenter The position of draw point is learnt with this, thus ensure that the safety of probe, probe is played positioning and protective effect, prior art lack Point：Positioning precision is poor；The particular location of probe can not be shown；Can not report to the police, the light on and off of bulb can only be leaned on to judge the big of probe Position approximate is put；Error is big, and reliability is low, and response speed is slow.

It is thus desirable to a kind of new positioner is solving drawbacks described above.

Utility model content

The purpose of this utility model is to provide a kind of positioner, and simple realization is easily, easy to operate, moderate, has Broader range of application.

To achieve these goals, the technical solution adopted in the utility model is：

A kind of positioner, described positioner includes closed cavity and the probe support being arranged in closed cavity, institute State and probe, connecting rod, proximity switch and ultrasonic ranging probe are fixed with probe support, described connecting rod is fixed on described probe and props up On the three-dimensional coordinate frame of frame periphery, described proximity switch and ultrasonic ranging probe connect to single-chip computer control system.

Preferably, the test scope 50 ~ 500mm of described positioner.

Preferably, the measuring accuracy 1mm of described positioner.

Preferably, described positionerForAutomatic alarm after being sensed by proximity switch 9 in the range of 0 ~ 1mm.

A kind of positioner that this utility model provides, substitutes existing draw point using ultrasound probe and proximity switch, and In the finding range of 50 ~ 500mm, under the control of single-chip microcomputer, accurately show the distance of probe and closed cavity inwall, its survey Away from precision up to 1mm.In the range of 0 ~ 50mm, worked by proximity switch, and the automatic alarm when distance is for 0 ~ 1mm.Should , compared with draw point positioner, positioning precision is high for this utility model, and accurately, reliability is high for range finding, and error is little, is quick on the draw, energy Accurately display probe distance, automatic alarm.

Brief description

Fig. 1 is the structural representation of existing positioner；

Fig. 2 is a kind of structural representation of positioner of this utility model；

Fig. 3 is a kind of hardware block diagram of the corresponding system of positioner of the present invention；

Fig. 4 is a kind of ultrasonic wave principle block diagram of the corresponding system of positioner of the present invention；

Fig. 5 is a kind of main program flow chart of the corresponding system of positioner of the present invention；

Fig. 6 is a kind of transmitting terminal flow chart of the corresponding system of positioner of the present invention；

Fig. 7 is a kind of ultrasound wave receiving terminal flow chart of the corresponding system of positioner of the present invention

Specific embodiment

The following detailed description of embodiment of the present utility model.Embodiment described below is exemplary it is intended to explain this reality With new, and should not be construed as to restriction of the present utility model.

With specific embodiment, the technical solution of the utility model is described in detail below in conjunction with the accompanying drawings, so that this reality Become apparent from new characteristic and advantage.

A kind of positioner, described positioner includes closed cavity 2 and the probe support 3 being arranged in closed cavity 2, Probe 1, connecting rod 5, proximity switch 9 and ultrasonic ranging probe 8 are fixed with described probe support 3, described connecting rod 5 is fixed on institute State on the three-dimensional coordinate frame of probe support 3 periphery, described proximity switch 9 and ultrasonic ranging probe 8 connect to Single-chip Controlling System.

The closed cavity probe positioning based on Single-chip Controlling, application ultrasonic listening technology and proximity switch for the present embodiment Device, as shown in Figure 2.In figure replaces the draw point 4 in Fig. 1 with proximity switch 9 and ultrasonic ranging probe 8, by wire and list Piece machine control system is connected, and, probe 1, proximity switch 9, ultrasonic ranging probe 8 alignment is fixed on probe support 3 meanwhile, Connecting rod 5 is connected with outside three-dimensional coordinate frame.When probe carries out three-dimensional motion with support and connecting rod in closed cavity 2, probe Just achieve three-dimensional motion.This system can pass through ultrasonic ranging distance of probe in the range of 50 ~ 500mm, by monolithic Machine system-computed simultaneously shows the distance between probe and cavity inner wall, and its range accuracy is up to 1mm.Scope in 0 ~ 50mm Interior, popped one's head in due to super refreshing ripple and enter blind area, now only proximity switch works, and the automatic alarm when distance is for 0 ~ 1mm.Should Utility model structure simple realization is easily, easy to operate, moderate, has broader range of application.

Alignment system corresponding to described positioner includes hardware system and software system：Described hardware system includes list Piece machine and the clock circuit, reset circuit, power supply, display, range finding and the sound and light alarm that are connected respectively with single-chip microcomputer, described power supply and Single-chip microcomputer is provided directly with proximity switch, and the control system of described single-chip microcomputer connects to drive circuit and probe support；Described soft Part system includes control module and the transmitter module being connected respectively and receiver module with control module, and described control module is used In the startup controlling transmitter module and receiver module.

The hardware above that makes introductions all round below and software section：

The single-chip microcomputer of hardware components adopts 89C52 chip, is enhancement mode 8051 single-chip microcomputer, can arbitrarily select 6 clocks/machine Device cycle and 12 clocks/machine cycle, completely compatible traditional 51 single-chip microcomputers of instruction code.Single-chip microcomputer is the core component of system； Clock circuit is the heart of single-chip microcomputer, and it controls the work rhythm of single-chip microcomputer.CPU completes difference by complicated sequence circuit Command function；Reset circuit is the level signal that single-chip microcomputer RST pin receives more than 2US, as long as ensureing the charge and discharge of electric capacity The electric time is more than 2US, you can realize resetting；Power supply adopts XY-400K DC source, and effect is that 220V alternating current is changed into 12V Unidirectional current, provides a stable 12V power supply to proximity switch and alarm device.By voltage stabilizing chip, the unidirectional current of 12V is turned again The direct current being changed to 5V supplies electricity to single-chip microcomputer and powers；Show using 1602 Character Mode LCDs with backlight, for showing probe The distance between with measured object；Using HC-SR04 ultrasonic ranging probe, it is a kind of contactless distance perspective probing for range finding Head, finding range is 50 ~ 500mm, and range accuracy is up to 1mm.It includes ultrasonic transmitter, receptor and control circuit three Point, it is main ranging unit, for launching and received ultrasonic signal.Ultrasonic ranging theory diagram is as shown in Figure 4；Acousto-optic The audible-visual annunciator reported to the police using model TGSG150, while switching on power, can send sound, two kinds of alarm signals of light； Proximity switch；When finding range is 0 ~ 50mm, the HC-SR04 ultrasonic ranging probe due to adopting comes into blind area, this Shi Caiyong J-0427S08PO type positive-negative-positive vortex type proximity switch（Also referred to as inductance approach switch）Ultrasonic ranging is replaced to visit Head measures.It makes interior of articles produce vortex using conductive body when producing electromagnetic field proximity switch close to this, This vortex reacts on proximity switch, so that proximity switch internal circuit parameter is changed, thus identifies and have or not conducting objects Body is close, and then the opening and disconnected of controlling switch.It should be noted that proximity switch has one disadvantage in that it is simply that object to be detected is necessary It is electric conductor.The internal simplified circuit diagram of positive-negative-positive proximity switch is as shown in Figure 5.Proximity switch is encountered and can be reported to the police during inwall.

Additionally, this utility model also has following part：Drive circuit, because electric current needed for acoustic-optic alarm is 900mA, And proximity switch is output as 100mA, therefore directly alarm device cannot be driven by proximity switch.This utility model adopts Insulated Gate Bipolar Transistor (IGBT) IGCT, effect is by Current amplifier, and 100mA electric current is turned It is changed to 900mA electric current to drive alarm device；Probe support device, this utility model probe support by probe, distance measuring sensor, Proximity switch and stock composition, probe, proximity switch and distance measuring sensor are alignd and are each attached to the support of stock one end On, it is placed in closing space, the stock other end is then fixed on the three-dimensional coordinate frame of outside, by adjusting frame of axes, you can realize The three-dimensional motion of probe.

Software section：Control module is main software section, during work, while starting radiating circuit, starts monolithic Intervalometer T0 within machine simultaneously starts counting up, and using the clocking capability of intervalometer, obtains signal from being transmitted into what return was passed through Time difference, by formula range finding=(time difference × 340ms)/2, calculates ultrasound probe the distance between to barrier.Control Subprogram flow chart is as shown in Figure 5；Transmitter module, while single-chip microcomputer launches range finding commencing signal to transmitting terminal, opens Move internal intervalometer and started timing, then started waiting for, till receiving return signal.Ultrasonic emitting module stream Journey figure is as shown in Figure 6；Receiver module, after starting intervalometer and transmitting ultrasonic pulse, when entering a wait Between, after beginning with return pulse and returning to receiving terminal, timing stops, and using this time point as final value.Use final value Obtain a time difference after deducting initial value, this time difference be exactly ultrasonic pulse by tested distance one passed through back and forth Time, just can calculate tested distance using this time difference.Receiving terminal flow chart is as shown in Figure 7.

A kind of localization method, described localization method is based on above-mentioned alignment system and positioner, and described localization method includes Following steps：

S1, starts the radiating circuit in transmitter module and the intervalometer T0 within single-chip microcomputer simultaneously and starts timing；

S2, begins with after return pulse returns to receiving terminal, timing stops, and using this time point as final value；

S3, signal calculated is poor from being transmitted into return elapsed time, thus drawing ultrasound probe between barrier Distance；

S4, when single-chip microcomputer launches return information to transmitting terminal, described transmitter module quits work.

Finally it should be noted that：This utility model is not limited in above-mentioned embodiment, any for this utility model The modification without departing from this utility model spirit and scope that carries out of specific embodiment or equivalent all new in this practicality Within the pending claims of type application.

Claims

1. a kind of positioner is it is characterised in that described positioner includes closed cavity（2）Be arranged on closed cavity（2） Interior probe support（3）, described probe support（3）On be fixed with probe（1）, connecting rod（5）, proximity switch（9）And ultrasound Away from probe（8）, described connecting rod（5）It is fixed on described probe support（3）On the three-dimensional coordinate frame of periphery, described proximity switch（9） With ultrasonic ranging probe（8）Connect to single-chip computer control system.

2. positioner according to claim 1 is it is characterised in that the test scope 50 ~ 500mm of described positioner.

3. positioner according to claim 1 is it is characterised in that the measuring accuracy 1mm of described positioner.

4. positioner according to claim 1 is it is characterised in that described positioner existsForIn the range of 0 ~ 1mm by Proximity switch（9）Automatic alarm after sensing.