CN101514552B - Sensor for detecting interlocking state of steel sheet piles - Google Patents

Abstract

The invention relates to a sensor for detecting the interlocking state of steel sheet piles, wherein a diode D1 is in series parallel connection with a first resistor R1 and a second resistor R2 so as to form a closed loop, and two ends of the first resistor R1 are used as two detecting ends of the sensor, namely an E end and an F end. The sensor has the advantages that: when the steel sheet piles are constructed in common severe environments such as regions of humid soil, alkali lands, and regions with higher content of metallic minerals, seaboards, river coastal areas and the like, the sensor can obtain an exacter measuring result of the interlocking state of two adjacent steel sheet piles with predetermined depths, and is not easy to make wrong judgments influenced the severe environments.

Description

Sensor for detecting interlocking state of steel sheet piles

Technical field

The invention belongs to the measurement detecting sensor, particularly a kind of sensor for detecting interlocking state of steel sheet piles.

Background technology

Detect for interlocking state of steel sheet piles, according to PCT/EP00/06484, filed Jul.7, there is this type of detectors of three kinds of principle of work at present in 2000 content introductions.It is very high that the disconnected risk of erroneous judgement takes place these three kinds of detectors sensor in the higher common abominable construction environments such as area, coastal area and river alongshore of damp soil, alkaline land, metal-containing minerals matter.

Wherein mode 1: according to patent EP0141463, sensor probe is installed in the steel sheet pile interlock, and two signal wires pass the iron pipe on the sheet pile, is connected in the sensor probe and at the probe internal short-circuit.Two signal wires are linked on the voltage source via connecting line, thereby have formed the closed-loop path from the voltage source on the ground of popping one's head in.When two adjacent steel sheet pile interlocks in probe fitting depth correct interlocking, thereby illustrate that second interlock on the steel sheet pile thrust that first sheet pile interlock is interior cuts above-mentioned probe.This makes the closed-loop path be cut off.Thereby can verify that two sheet piles are in the correctly interlocking of the probe place degree of depth.On the contrary when second sheet pile the probe place degree of depth not with first correct interlocking of sheet pile, then the boss on second sheet pile interlock can't cut off the probe in first sheet pile interlock, the closed-loop path is still constant after second sheet pile squeezed into, thereby proves that two sheet piles are separated from the probe place degree of depth.

Yet there is major defect in the sensor that patent EP0 141 463 is presented.For example when two signal transmssion line short circuits, then result of detection shows that all the time probe is complete, and after the twoth sheet pile squeezed into, even if probe is cut, result of detection also will show the incorrect interlocking of two sheet piles.In contrast, in the final stage of squeezing into, two signal transmssion lines open circuit, and then can be judged as probe by mistake and cut as if second sheet pile.According to above-mentioned two kinds of situations, the result of detection that will must make mistake to the sheet pile interlocking state.According to mentioned above, be worth emphasizing the short circuit of sensor signal transmission line and the often generation in practice of construction of opening circuit.Sensor according to patent EP0 141 463 is very high in the risk of measuring the judgement of sheet pile interlocking state mistiming.

Mode 2: according to patent EP00/06484, form detection circuit (as Fig. 1) by resistance R 1, R2, R3 series-parallel connection in the sensor, resistance R 3 is in probe.The ground monitoring means recorded all-in resistance Ra=RL+[R1* (R2+R3)/(R1+R2+R3) when sensor was intact] (as Fig. 1).

The ground monitoring means recorded all-in resistance Rb=RL+R1 (as Fig. 2) when sensor probe was cut.

Sensor is during with lead short circuit that monitoring means on the ground is connected, and the ground monitoring means records all-in resistance Rc=RL (as Fig. 3).

Sensor is during with wire break that monitoring means on the ground is connected, and the ground monitoring means records all-in resistance Rd (as Fig. 4).

Sensor probe is cut and during by short circuit, monitoring means records all-in resistance Re=RL+[R1*R2/ (R1+R2) on the ground] (as Fig. 5).

Cut yet work as probe (being resistance R 3), and there be conducting liquid (as seawater) or the conduction ore (as iron ore) with a constant impedance on every side in the contact A, the B that expose in the external world.This moment if the impedance of extraneous conducting medium near the resistance (as Fig. 6) of R3, then the all-in resistance that records of monitoring means approximates Ra on the ground, promptly to be judged as sensor probe intact by mistake.Be worth emphasizing that at damp soil, alkaline land, when the higher common rugged surroundings such as area, coastal area and river alongshore of metal-containing minerals matter are carried out steel sheet pile construction, disconnected being easy to of this type of erroneous judgement taken place.

Summary of the invention

Technical matters to be solved by this invention is: a kind of sensor for detecting interlocking state of steel sheet piles is provided.It is very high that the disconnected risk of erroneous judgement takes place solution sensor in the higher common abominable construction environments such as area, coastal area and river alongshore of damp soil, alkaline land, metal-containing minerals matter.

Technical scheme of the present invention is:

A kind of sensor for detecting interlocking state of steel sheet piles is characterized in that: form the closed-loop path by diode D1 series-parallel connection first resistance R 1 and second resistance R 2, from the two ends of first resistance R 1 as two test sides of sensor, an E end, a F end.

Two signal wires are held 2 monitoring means that are connected to the land by the end of the E in the sensor, F respectively; Signal ground that is linked to monitoring means via connecting line of two signal wires---zero potential, it is the T level variable signal of second that another root signal wire receives the cycle that signal generator sends in the monitoring means via connecting line, the square-wave signal of pointing out in the instructions for example makes the conducting of asymmetrical circuit element diode (D1) generating period and ends; Thereby make the interior circuit of sensor form the closed-loop path to the signal generator of monitoring means on the ground.The a kind of of level variable signal is square-wave signal.

Effect of the present invention is:

At damp soil, alkaline land, when the higher common rugged surroundings such as area, coastal area and river alongshore of metal-containing minerals matter are carried out steel sheet pile construction, be suitable for sensor of the present invention and can draw measurement result comparatively accurately, be not subject to rugged surroundings influence generation erroneous judgement and break the interlocking state of predetermined depth two adjacent steel sheet piles.

Description of drawings

Fig. 1 is patent EP00/06484, the detection circuit figure that is made up of resistance R 1, R2, R3 series-parallel connection in the sensor.

Fig. 2 be sensor probe when being cut on the ground monitoring means record the schematic diagram of all-in resistance Rb=RL+R1.

During Fig. 3 is a sensor with monitoring means on the ground is connected lead short circuit, the ground monitoring means records the principle schematic of all-in resistance Rc=RL.

During Fig. 4 is a sensor with monitoring means on the ground is connected wire break, the ground monitoring means records the schematic diagram of all-in resistance Rd.

Fig. 5 is that sensor probe is cut and during by short circuit, monitoring means records all-in resistance Re=RL+[R1*R2/ (R1+R2) on the ground] schematic diagram.

Fig. 6 is cut when probe (being resistance R 3), and there be the principle schematic of impedance near the conducting liquid (as seawater) or the conduction ore (as iron ore) of R3 resistance on every side in the contact A, the B that expose in the external world.

Fig. 7 .1 is the structure of sensor for detecting interlocking state of steel sheet piles and uses synoptic diagram.

Fig. 7 .2 is the use synoptic diagram of sensor for detecting interlocking state of steel sheet piles.

Fig. 8 is a circuit theory synoptic diagram when sensor and lead are intact.

Fig. 9 is that the probe on the sensor cut is that diode D1 is cut, and H, G two exposed contacts principle schematic during short circuit not.

Figure 10 is that the probe on the sensor cut is that diode D1 is cut, and H, G two exposed contacts principle schematic during by short circuit.

Figure 11 is that the probe on the sensor cut is that diode D1 is cut, and H, G two exposed contacts to be access in an equivalent impedance be R _NExtraneous conducting medium principle schematic.

Figure 12 is two transfer wires being connected with monitoring means on the ground when sensor principle schematic during by short circuit.

Figure 13 is a principle schematic when two transfer wires that sensor is connected with monitoring means are on the ground opened circuit.

Among the figure: RL lead equivalent resistance, the extraneous conducting medium equiva lent impedance of RN, the A reometer, the interlock of 1, second steel sheet pile, 2, the interlock of sensor place steel sheet pile, 3, sensor, 4, sensor probe, 5, connect two leads of monitoring means and sensor on the ground, 6, monitoring means on the ground, 7 sensor internals, 8, square wave signal generator.

Embodiment

A kind of sensor for detecting interlocking state of steel sheet piles shown in Fig. 7 .1 forms the closed-loop path by diode D1 series-parallel connection first resistance R 1 and second resistance R 2, from the two ends of first resistance R 1 as two test sides of sensor, an E end, a F end.

Two signal wires are held 2 monitoring means that are connected to the land by the end of the E in the sensor, F respectively; Signal ground that is linked to monitoring means via connecting line of two signal wires---zero potential, it is the square-wave signal that the level variable signal of T second is for example pointed out in the instructions that another root signal wire receives signal generator sends in the monitoring means cycle via connecting line, makes the conducting of asymmetrical circuit element diode (D1) generating period and ends; Thereby make the interior circuit of probe form the closed-loop path to the signal generator of monitoring means on the ground.

Sensor probe is installed in the steel sheet pile interlock shown in Fig. 7 .1, and diode D1 is in probe, and two signal wires are drawn the monitoring means that the line iron pipe is connected to the land that protects that passes on the sheet pile by the E in the sensor, F 2 points (as Fig. 7 .1) respectively.Signal ground (zero potential) that is linked to monitoring means via connecting line of two signal wires, it is that the T square-wave signal of second (but is not limited to square-wave signal that another root signal wire receives the cycle that signal generator sends in the monitoring means via connecting line, the level variable signal gets final product), the signal high-low level is respectively V1 (positive voltage) and V2 (negative voltage), and magnitude of voltage V1=-V2, then its absolute value | V1|=|V2|.Thereby make the signal generator of the monitoring means on the ground of popping one's head in form closed-loop path (as Fig. 7 .1 and Fig. 7 .2).

When sensor and lead are intact, circuit theory (as Fig. 8).When the K point voltage is V1 (positive voltage), reometer detected current value I ₃

${\mathrm{<figure-callout\; id="3"\; label="I"\; filenames="H2008100541505E00021.png"\; state="\{\{state\}\}">I</figure-callout>}}_3=\frac{\left|V1\right|}{\frac{R_1*(R_2+R_D)}{R_1+R_2+R_D}+R_L}$

R in the following formula _DIt is the equivalent resistance of diode D1.When the K point voltage was V2 (negative voltage), diode was subjected to reverse voltage and ends, then reometer detected current value I ₄, visible I ₃I ₄

$I_4=\frac{\left|\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="H2008100541505E00041.png"\; state="\{\{state\}\}">V</figure-callout>}1\right|}{R_1+R_L}$

When then sensor and lead are intact because K point square-wave signal period T second, so the measured current value of reometer every T/2 second at I ₃And I ₄Between checker once.

It is that diode D1 is cut that probe on sensor is cut, and H, G two exposed contacts not (as Fig. 9) during short circuit, reometer detected current value I ₄

It is that diode D1 is cut that probe on sensor is cut, and H, G two exposed contacts are during by short circuit (as Figure 10), reometer detected current value I ₂, visible I ₂I ₃I ₄

${\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="H2008100541505E00021.png"\; state="\{\{state\}\}">I</figure-callout>}}_2=\frac{\left|V1\right|}{\frac{R_2*R_2}{R_1+R_2}+R_L}$

It is that diode D1 is cut that probe on sensor is cut, and to be access in an equivalent impedance be R in H, G two exposed contacts _NExtraneous conducting medium (as Figure 11), reometer detected current value I _N, visible I ₂I _NI ₄

$I_N=\frac{\left|V1\right|}{\frac{R_1*(R_2+R_N)}{R_1+R_2+R_N}+R_L}$

Two transfer wires that are connected with monitoring means on the ground when sensor are during by short circuit (as Figure 12), reometer detected current value I ₁, visible I ₁I ₂I ₃I ₄

${\mathrm{<figure-callout\; id="1"\; label="I"\; filenames="H2008100541505E00041.png"\; state="\{\{state\}\}">I</figure-callout>}}_1=\frac{\left|\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="H2008100541505E00041.png"\; state="\{\{state\}\}">V</figure-callout>}1\right|}{R_L}$

When two transfer wires that are connected with monitoring means on the ground when sensor are opened circuit (as Figure 13), reometer detected current value I ₅, visible I ₁I ₂I ₃I ₄I ₅

I ₅≈0A

Four current reference value I are set in the monitoring means on the ground _a, I _b, I _c, I _d, make I _aI ₁I _bI ₂I ₃I _cI ₄I _dI ₅

The current value perseverance of surveying when reometer is I _XAnd satisfy I _aI _XI _bThe time, on the ground monitoring means is designated as state 1, shows that two transfer wires that sensor is connected with the ground monitoring means are by short circuit.

The current value perseverance of surveying when reometer is I _XAnd satisfy I _bI _XI _cThe time, on the ground monitoring means is designated as state 2, shows that it is that diode D1 is cut that probe on the sensor has been cut, and H, G two exposed contacts are by short circuit.

The current value perseverance of surveying when reometer is I _XAnd satisfy I _cI _XI _dThe time, on the ground monitoring means is designated as state 3, shows that it is that diode D1 is cut that probe on the sensor has been cut, and H, G two exposed contacts open circuits.

The current value perseverance of surveying when reometer is I _XAnd satisfy I _dI _XThe time, monitoring means is designated as state 4 on the ground, shows that sensor is opened circuit with two transfer wires that the ground monitoring means is connected.

The current value of surveying when reometer every T/2 second at I _XAnd I _YBetween checker once, and satisfy I _bI _XI _cI _YI _dThe time, monitoring means is designated as state 5 on the ground, shows that sensor and lead are intact.

In sensor correctly is installed in the steel sheet pile interlock of predetermined depth as shown in Figure 8, and sensor is squeezed into second piece steel sheet pile with monitoring means UNICOM on the ground after forming the closed-loop path by lead, and the interlock of second steel sheet pile is thrust in the interlock of first sheet pile at sensor place.When the head of second steel sheet pile interlock is driven into the sensor place degree of depth, if this moment, monitoring means was designated as state 5 on the ground, illustrate that then second boss on the sheet pile interlock can't cut off the probe in first sheet pile interlock, the closed-loop path is still constant after second sheet pile squeezed into, thereby proves that two sheet piles are separated from the probe place degree of depth.If on the ground monitoring means is designated as state 2 or state 3, thereby illustrate that second interlock on the steel sheet pile cut above-mentioned probe in the sensor fitting depth has thrust first sheet pile interlock, this makes that diode D1 is cut.Thereby can verify that two sheet piles are in the correctly interlocking of the probe place degree of depth.If monitoring means is designated as state 1 or state 4, illustrate that sensor above-mentioned fault occurs and can't verify the probe state with two transfer wires that the ground monitoring means is connected on the ground.

It is that diode D1 is cut that probe on sensor is cut, and to be access in an equivalent impedance be R in H, G two exposed contacts _NExtraneous conducting medium (as Figure 11), reometer detected current value I _N, because I ₂I _NI ₄So, I _bI _NI _d, this moment, monitoring means was designated as state 2 or state 3 on the ground, and promptly two sheet piles are in the correctly interlocking of the probe place degree of depth, because I _NThe cyclical variation of rule can not take place, so can be judged as state 5 this moment by mistake, promptly probe and lead are intact, and two sheet piles are separated from the probe place degree of depth.

Even if therefore at damp soil, alkaline land, when the higher common rugged surroundings such as area, coastal area and river alongshore of metal-containing minerals matter are carried out steel sheet pile construction, sensor of the present invention can draw measurement result comparatively accurately to the interlocking state of predetermined depth two adjacent steel sheet piles, and being difficult for that probe is cut mistake, to be judged as probe intact.

Claims (2)

1. sensor for detecting interlocking state of steel sheet piles, it is characterized in that: form the closed-loop path by asymmetrical circuit element diode (D1) series-parallel connection first resistance (R1) and second resistance (R2), from the two ends of first resistance (R1) as two test sides of sensor, an E end, a F end; Two signal wires are held 2 monitoring means that are connected to the land by the end of the E in the sensor, F respectively; Signal ground-zero potential that is linked to monitoring means via connecting line of two signal wires, it is the T level variable signal of second that another root signal wire receives the cycle that signal generator sends in the monitoring means via connecting line, makes the conducting of asymmetrical circuit element diode (D1) generating period and ends; Thereby make the interior circuit of sensor form the closed-loop path to the signal generator of monitoring means on the ground.

2. sensor for detecting interlocking state of steel sheet piles according to claim 1 is characterized in that: a kind of of level variable signal is square-wave signal.

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