CN205280006U - Ultrasonoscope rice ware - Google Patents

Abstract

The utility model discloses an ultrasonoscope rice ware, include: a cable transmission module (4) for making wait to detect cable (14) and be linear the transport, cable transmission module (4) compresses tightly module (3) with the lift and links to each other, wait that the top level that detects cable (14) is provided with ultrasonic wave transducing module, the output of ultrasonic wave transducing module links to each other with the input of ultrasonic wave transmit -Receive unit (7), the output of ultrasonic wave transmit -Receive unit (7) links to each other with the input of amplifying unit (8), the output of amplifying unit (8) links to each other with the input of filtering unit (9), the output of filtering unit (9) links to each other with the input of AD translation unit (10). The utility model provides a pair of ultrasonoscope rice ware can effectively improve meter rice measuring precision, and the cable is difficult for skidding simultaneously, can carry out the high speed and draw, raises the efficiency.

Description

A kind of ultrasound wave meter counter

Technical field

This utility model relates to a kind of ultrasound wave meter counter, belongs to field of measuring technique.

Background technology

Often need to carrying out length metering in cable production and application process, existing cable meter counter is broadly divided into mechanical type, electronic type, and monolithic processor controlled Multifunctional cable length meter counter. The metering test Data Source of most meter counter is all adopt rice counting wheel to roll at cable surface frictionally to get. The friction rolling metering relying on cable and rice counting wheel has the drawback that and starts in metering, terminates, when intermediate hold, due to inertia force effect, causes rice counting wheel and cable surface skidding, can cause error of meter counter; Secondly, rice counting wheel is long-time and cable contact, can produce abrasion so that rice counting wheel girth changes, also can form mistake metering.

Utility model content

It is towed that technical problem to be solved in the utility model is to provide a kind of cable, it is prevented that skidding, slack and undisciplined phenomenon occurs in transmission process in cable, the length of cable that employing ultrasonic measurement pulls out, is effectively improved the ultrasound wave meter counter of metering certainty of measurement; Further, this utility model provides the metering algorithm of a kind of ultrasound wave meter counter adopting ultrasound data to carry out accurate metering.

For solving above-mentioned technical problem, the technical solution adopted in the utility model is:

A kind of ultrasound wave meter counter, it is characterized in that, including: for the cable transmission module making cable to be detected linearly carry, described cable transmission module is connected with lifting compression module, the upper horizontal of described cable to be detected is provided with ultrasonic wave transducer module, the outfan of described ultrasonic wave transducer module is connected with the input of ultrasonic transmission/reception unit, the described outfan of ultrasonic transmission/reception unit is connected with the input of amplifying unit, the outfan of described amplifying unit is connected with the input of filter unit, the outfan of described filter unit is connected with the input of A/D converting unit, the described outfan of A/D converting unit is connected with the input of memory element, the outfan of described memory element is connected with the input of computing unit, described ultrasonic transmission/reception unit, cable transmission module, lifting compression module, memory element, computing unit, metering display module is all connected with main control module with power module.

Described cable transmission module includes at least 4 guide rollers of the symmetrically formula distribution of both sides up and down of the cable described to be detected in horizontal positioned, being provided with the groove for putting into described cable to be detected on described guide roller, described guide roller includes being positioned at least 2 upper conductors wheels of the upside of described cable to be detected and is positioned at least 2 lower wires wheels of downside of described cable to be detected; Described lower wire wheel is connected with lifting compression module.

Described upper conductor wheel is identical with the rotating speed of lower wire wheel, turns to contrary.

Described main control module includes MSP430 single-chip microcomputer;

Described ultrasonic wave transducer module includes the first ultrasonic transducer for sending ultrasonic pulse signal and for receiving the second ultrasonic transducer of ultrasonic pulse signal; It is provided with field effect transistor in described first ultrasonic transducer and the second ultrasonic transducer; It is connected with the I/O port of MSP430 single-chip microcomputer with the NMOS gate of radiating circuit of the described ultrasonic transmission/reception unit receiving ultrasonic pulse signal for controlling the first ultrasonic transducer and the transmission of the second ultrasonic transducer; Described ultrasonic transmission/reception unit is carried out transmission or the reception of ultrasonic pulse signal by described MSP430 Single-chip Controlling.

Described amplifying unit includes first stage amplifier and two-stage amplifier, and described first stage amplifier includes the adjustable potentiometer PR2 of amplification, is connected by R-C network between described first stage amplifier and two-stage amplifier.

Described memory element includes FIFO memory.

Described computing unit includes dsp chip.

A kind of metering algorithm of ultrasound wave meter counter, it is characterised in that: comprise the following steps:

If the first ultrasonic transducer is H to the vertical dimension of cable to be detected, the path of the ultrasonic pulse signal that the first ultrasonic transducer sends is L to the horizontal range of the point of penetration of cable to be detected, the path angle of incidence of the ultrasonic pulse signal sent is ��, by placing and adjust the first ultrasonic transducer and the position of the second ultrasonic transducer in advance, directly obtain the value of H, L and ��;

Calculate the path S, i.e. line of incidence length S of the ultrasonic pulse signal sent:

$S=\sqrt{H^2+L^2}---\left(1\right)$

The cable to be detected speed in distraction procedure is set to v_s, v_sComponent on reflected ray direction is v_x, then:

v_x=v_s��cos��(2)

Reflected ray is the path receiving ultrasonic pulse signal;

If ultrasonic pulse signal is sent to the second ultrasonic transducer from the first ultrasonic transducer, to receive the time used be t_s, when cable to be detected starts to draw, main control module starts timing, then:

$\frac{S}{v_c}+\frac{S}{v_c+v_x}=t_s---\left(3\right)$

In formula (3), v_cFor the aerial spread speed of ultrasonic pulse signal, v_c=340m/s;

By formula (2), formula (3) obtains the cable to be detected speed v in distraction procedure_s:

$v_s=\frac{t_s\·{v_c}^2-2S\·v_c}{(S-t_s\·v_c)\·\cos \mathrm{\θ}}---\left(4\right)$

Formula (5) is utilized to calculate the length L of the cable to be detected pulled out_s:

$L_s={\∫}_{t_0}^{t_s}{v}_{s}dt---\left(5\right)$

In formula (5), t₀=0.

Described first ultrasonic transducer and the second ultrasonic transducer symmetrical expression are positioned at the both sides of described point of penetration.

Adopting this utility model, can be effectively improved the precision that metering is measured, cable not easily skids simultaneously, it is possible to carry out high speed traction, improves efficiency. The each unit module stability used is good, reliability is high and cost is low, it is possible to realize efficiently accurate cable metering work.

A kind of ultrasound wave meter counter that this utility model provides, the setting of cable transmission module, it is responsible for cable from meter counter one end linear transmission to the other end, it is achieved that cable of the present utility model is towed, it is also possible to carry out high speed traction, improves metering efficiency; The setting of lifting compression module, is responsible for, by cable transmission module and cable clamping, increasing the frictional force between cable transmission module and cable, and providing certain tension force for cable, make cable to be detected not easily skid or slack and undisciplined, it is achieved that high speed traction; The setting of ultrasonic wave transducer module, makes this utility model adopt the length of cable that pulls out of ultrasonic measurement, is effectively improved metering certainty of measurement; First ultrasonic transducer and the second ultrasonic transducer are sent by master control module controls ultrasonic transmission/reception unit and are received ultrasonic pulse signal, it is achieved that the ultrasonic type of length of cable is measured; Amplifying unit is responsible for that survey calculation is obtained signal and is amplified; Filter unit is responsible for the signal after by amplification and is filtered processing; A/D converting unit is responsible for converting filtered analogue signal to the signal of telecommunication; Memory element is used for storing A/D converting unit and transmits the data of coming; Computing unit is used for the data conversion Calculation in memory element is obtained measurement result; Metering display module is responsible for showing the data finally recorded. Power module is responsible for powering to each working cell of the present utility model.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of cable transmission module in this utility model;

Fig. 3 is metering algorithm principle figure of the present utility model;

Fig. 4 is the circuit diagram of ultrasonic transmission/reception unit in this utility model;

Fig. 5 is the circuit diagram of amplifying unit in this utility model;

Fig. 6 is the circuit diagram of filter unit in this utility model;

Fig. 7 is the circuit diagram of A/D converting unit in this utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is further described.

As it is shown in figure 1, a kind of ultrasound wave meter counter, including power module 1, main control module 2, lifting compression module 3, cable transmission module 4, one group of ultrasonic wave transducer module (first ultrasonic transducer 5 and the second ultrasonic transducer 6), ultrasonic transmission/reception unit 7, amplifying unit 8, filter unit 9, A/D converting unit 10, memory element 11, computing unit 12 and metering display module 13. Described memory element 11 includes FIFO memory. Described computing unit 12 includes dsp chip.

Power module 1 is responsible for powering to each working cell of whole meter counter.

Main control module 2 is responsible for controlling lifting compression module 3, cable transmission module 4, the first ultrasonic transducer 5, the second ultrasonic transducer 6, ultrasonic transmission/reception unit 7, amplifying unit 8, filter unit 9, A/D converting unit 10, FIFO, DSP and metering display module 13.

As in figure 2 it is shown, lifting compression module 3 is responsible for clamping cable transmission module 4 and cable 14 to be detected, increases the frictional force between cable transmission module 4 and cable to be detected 14, and provide certain tension force for cable 14 to be detected.

As in figure 2 it is shown, cable transmission module 4 is with reeded guide roller to form by four edges, respectively two upper conductor wheels 41 and two lower wire wheels 42. Four guide rollers of this cable transmission module 4 are axially in parallel is positioned over cable 14 both sides to be detected, and by main control module 2 Synchronization Control, four guide roller rotating speeds are consistent. It is responsible for cable 14 to be detected from meter counter one end linear transmission to the other end.

First ultrasonic transducer 5 and the second ultrasonic transducer 6 are controlled ultrasonic transmission/reception unit 7 by main control module 2 and send and receive ultrasonic pulse.

Amplifying unit 8 is responsible for that survey calculation is obtained signal and is amplified.

Filter unit 9 is responsible for the signal after by amplification and is filtered processing.

A/D converting unit 10 is responsible for converting filtered analogue signal to the signal of telecommunication.

FIFO is used for storing A/D converting unit 10 and transmits the data of coming.

DSP is used for the data conversion Calculation in FIFO is obtained measurement result.

Metering display module 13 is responsible for the data that display finally records.

As shown in Fig. 1��Fig. 2, during utility model works, first cable 14 to be detected is placed between four guide rollers of cable transmission module 4, lifting compression module 3 is controlled by main control module 2, adjust the height of lower wire wheel 42 up and down so that cable 14 to be detected is clamped and is horizontal by four guide rollers simultaneously. Being rotated counterclockwise by the synchronized rotation simultaneously of four guide rollers and upper conductor wheel 41 controlling cable transmission module 4, lower wire wheel 42 rotates clockwise, and draws cable 14 to be detected in cable 14 one end to be detected. While drawing cable 14 to be detected, ultrasonic transmission/reception unit 7 controls the first ultrasonic transducer 5 and the second ultrasonic transducer 6 sends and receives ultrasonic pulse signal, through amplifying unit 8, filter unit 9, A/D converting unit 10, FIFO, DSP calculating obtains the length of the cable to be detected 14 pulled out, and send the data recorded to metering display module 13, it is shown that measurement result.

As it is shown on figure 3, brief description ultrasound examination cable ultimate principle.

Remember that the first ultrasonic transducer 5 is H to the vertical dimension of cable 14 to be detected, first ultrasonic transducer 5 is L to the horizontal range of cable 14 starting point to be detected (namely in Fig. 3 ultrasonic pulse signal path to the point of penetration of cable 14 to be detected), the angle of incidence in ultrasonic pulse signal path is ��, by placing and adjust the position of the first ultrasonic transducer 5 and the second ultrasonic transducer 6 in advance, H, L and �� can be directly obtained.

UtilizeFormula (1), calculates the length S of line of incidence. The cable 14 to be detected speed in distraction procedure is designated as v_s, its component on reflected ray direction is v_x, then

v_x=v_s��cos��(2)

Note ultrasonic pulse signal is sent to the second ultrasonic transducer 6 from the first ultrasonic transducer 5, and to receive the time used be t_s(when cable 14 to be detected starts to draw, main control module 2 starts timing), then:

$\frac{S}{v_c}+\frac{S}{v_c+v_x}=t_s---\left(3\right)$

Wherein, v_cFor the aerial spread speed of ultrasound wave, v_c=340m/s.

Utilize formula (2) and formula (3), obtain the cable 14 to be detected speed in distraction procedure:

$v_s=\frac{t_s\·{v_c}^2-2S\·v_c}{(S-t_s\·v_c)\·\cos \mathrm{\θ}}---\left(4\right)$

Formula (5) is utilized to calculate the length L of the cable to be detected 14 pulled out_s:

$L_s={\∫}_{t_0}^{t_s}{v}_{s}dt---\left(5\right)$

Wherein, t₀For time of preliminary examination, t₀=0.

As shown in Figure 4, the break-make excitation transducer that the first ultrasonic transducer 5 in this utility model and the second ultrasonic transducer 6 are controlled high speed field effect transistor by MSP430 single-chip microcomputer 2 sends ultrasonic pulse, the grid of the NMOS of radiating circuit is connected with the I/O port of MSP430 single-chip microcomputer, controlled by the access of the I/O to MSP430, make ultrasonic transmission/reception unit 7 at a time can only realize hyperacoustic transmitting or hyperacoustic reception. Adopting CD4051 to constitute analog switch signal is selected, CD4051, under the control of MSP430, exports next stage circuit not controlling a wherein road signal in the same time.

There is a degree of decay as it is shown in figure 5, propagate in atmosphere due to ultrasonic signal, the impulse wave of ultrasonic signal is difficult to remain stable for, and the ultrasonic signal therefore received is very faint, it is easy to because of signal amplitude fluctuation, missing inspection or erroneous judgement occur. For ensureing to receive the intensity of signal, it is necessary to increase after oscillator signal is carried out pretreatment by preamplifier and be then added on next stage circuit. Amplifying circuit is made up of two panels low noise, precision, high speed operation amplifier OP37 and R, C network. Preposition amplification adopts two-stage to amplify, and total magnification is equal to two-stage amplification long-pending. The first order adopts potentiometer PR2, and amplification is adjustable, and maximum amplification is 51 times. Second level amplification is 39 times. May finally being determined that the amplification of whole amplifier is 1989 times to the maximum by two-stage amplification, the ultrasonic echo signal voltage magnitude through amplifier fully meets next stage circuit needs.

As shown in Figure 6, the band filter of the present utility model two second order filter cascades within MAX275 realize quadravalence active power filtering. Using the output signal BPOA of the first order band filter input signal as second level band filter, constituting mid frequency is the band filter of 40KHz, and filter centre frequency F0 is 40KHz. Main amplifying circuit is realized by AD8225, the DC voltage that the signal after filter process exports is met about 1.5V��2V, just meets the A/D converted input signal requirement of ADS930.

As it is shown in fig. 7, this utility model utilizes MSP430 Single-chip Controlling ADS930 conversion chip to enable enables chip, and produce the pwm signal input input to ADS930 conversion chip CLK signal, it is achieved amplifying circuit is exported the collection of signal. Sampled data is by the output of D0��D7 pin. The data of A/D conversion output store in FIFO, the TMS320VC5410 of DSP data conversion Calculation in FIFO is obtained measurement result.

The above is only preferred implementation of the present utility model; it is noted that, for those skilled in the art; under the premise without departing from this utility model principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (8)

1. a ultrasound wave meter counter, it is characterized in that, including: it is used for the cable transmission module (4) making cable to be detected (14) linearly carry, described cable transmission module (4) is connected with lifting compression module (3), the upper horizontal of described cable to be detected (14) is provided with ultrasonic wave transducer module, the outfan of described ultrasonic wave transducer module is connected with the input of ultrasonic transmission/reception unit (7), the outfan of described ultrasonic transmission/reception unit (7) is connected with the input of amplifying unit (8), the outfan of described amplifying unit (8) is connected with the input of filter unit (9), the outfan of described filter unit (9) is connected with the input of A/D converting unit (10), the outfan of described A/D converting unit (10) is connected with the input of memory element (11), the outfan of described memory element (11) is connected with the input of computing unit (12), described ultrasonic transmission/reception unit (7), cable transmission module (4), lifting compression module (3), memory element (11), computing unit (12), metering display module (13) is all connected with main control module (2) with power module (1).

2. a kind of ultrasound wave meter counter according to claim 1, it is characterized in that: described cable transmission module (4) includes at least 4 guide rollers of the symmetrically formula distribution of both sides up and down of the cable described to be detected (14) in horizontal positioned, being provided with the groove for putting into described cable to be detected (14) on described guide roller, at least 2 lower wires of at least 2 upper conductors wheel (41) that described guide roller includes being positioned at the upside of described cable to be detected (14) and the downside that is positioned at described cable to be detected (14) take turns (42); Described lower wire wheel (42) is connected with lifting compression module (3).

3. a kind of ultrasound wave meter counter according to claim 2, it is characterised in that: the rotating speed that described upper conductor wheel (41) takes turns (42) with lower wire is identical, turns to contrary.

4. a kind of ultrasound wave meter counter according to claim 1, it is characterised in that: described main control module (2) includes MSP430 single-chip microcomputer.

5. a kind of ultrasound wave meter counter according to claim 4, it is characterised in that: described ultrasonic wave transducer module includes the first ultrasonic transducer (5) for sending ultrasonic pulse signal and for receiving second ultrasonic transducer (6) of ultrasonic pulse signal; It is provided with field effect transistor in described first ultrasonic transducer (5) and the second ultrasonic transducer (6); For controlling the first ultrasonic transducer (5), the NMOS gate of radiating circuit sent with the described ultrasonic transmission/reception unit (7) receiving ultrasonic pulse signal is connected with the I/O port of MSP430 single-chip microcomputer with the second ultrasonic transducer (6); Described ultrasonic transmission/reception unit (7) is carried out transmission or the reception of ultrasonic pulse signal by described MSP430 Single-chip Controlling.

6. a kind of ultrasound wave meter counter according to claim 1, it is characterized in that: described amplifying unit (8) includes first stage amplifier and two-stage amplifier, described first stage amplifier includes the adjustable potentiometer PR2 of amplification, is connected by R-C network between described first stage amplifier and two-stage amplifier.

7. a kind of ultrasound wave meter counter according to claim 1, it is characterised in that: described memory element (11) includes FIFO memory.

8. a kind of ultrasound wave meter counter according to claim 1, it is characterised in that: described computing unit (12) includes dsp chip.