Power approaching early warning device for suspension arm of mobile automobile crane

Abstract

The utility model provides a near-electricity early warning device for a suspension arm of a mobile automobile crane, which relates to the technical field of safety detection equipment and comprises an on-site sending terminal box and a receiving alarm unit, the field sending terminal box is fixed at the top end of a suspension arm of the mobile automobile crane; the on-site sending terminal box comprises an upper shell, a built-in circuit and a lower shell. The built-in circuit is fixed on the lower shell; the built-in circuit comprises a near-electricity alarm circuit diagram, a photoelectric isolation amplifying circuit, a power supply unit and a wireless transmitting circuit. The receiving alarm unit is mounted in a cab; the receiving alarm unit comprises a box body and a wireless receiving circuit. The device provided by the utility model has the advantages of full voltage coverage, strong scene adaptability, stable signal and low false alarm rate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety detection equipment, and specifically, especially relates to a mobile automobile crane boom near electricity early warning device. BACKGROUND

[0002] The existing crane near electricity early warning device is a kind of portable safety equipment using electromagnetic induction technology to monitor high-voltage line power frequency magnetic field in real time, and immediately issuing sound and light voice alarm to the cab through 2.4G wireless link when the boom approaches 10kV~220kV line to set safety distance, the magnetic attraction type front probe and receiving end are designed separately, can be quickly transferred between different cranes, positioning accuracy is ±0.5m, anti-interference is strong, and the risk of electric shock is significantly reduced.The existing crane near electricity early warning device has the following technical defects, which is difficult to meet the needs of complex construction scene:

[0003] First, poor voltage adaptability: most devices only support a single high-voltage level (such as 10kV or more), cannot cover AC220-380V low-voltage line, resulting in monitoring blind area when operating in low-voltage equipment area in factory.

[0004] Second, signal stability is insufficient: pulse signal output is adopted, which is easily affected by electromagnetic interference (such as electric welder, frequency converter) in construction site, false alarm rate is as high as 30%, and driver is easy to produce "early warning fatigue".

[0005] Further, the installation and operation are complicated: the detection unit needs to be fixed by professional tools, and the installation time is more than 30 minutes; voltage level switching needs to open the device shell to adjust, and the efficiency is low when adapting to different scenes.

[0006] Finally, the alarm linkage is weak: the receiving unit can only issue a single sound alarm, and the recognition degree is low in noisy construction site (noise≥85dB), and there is no hierarchical early warning mechanism, which cannot prompt the danger degree. INVENTION CONTENTS

[0007] According to the above-mentioned technical problems of poor voltage adaptability, insufficient signal stability, complicated installation and operation and weak alarm linkage, a mobile automobile crane boom near electricity early warning device is provided.

[0008] The technical means adopted by the utility model are as follows:

[0009] A mobile automobile crane boom near electricity early warning device, characterized in that it comprises: a field sending terminal box and a receiving alarm unit; the receiving alarm unit is installed in the driver's room;

[0010] The field sending terminal box is fixed at the top end of the mobile automobile crane boom;

[0011] The field transmitting terminal box includes: an upper housing, an internal circuit, and a lower housing; the internal circuit is fixed on the lower housing; the internal circuit includes: a proximity alarm circuit, an opto-isolation amplifier circuit, a power supply unit, and a wireless transmission circuit;

[0012] The proximity alarm circuit includes: antenna I, proximity sensing chip JW0818, resistors R1, R2, R3, R4, R5, R6, and R7, capacitors C1, C2, C3, C4, and C5, power switches S1, S2, S3, S4, and S5, crystal oscillator, 3V power supply BAT, buzzer B1, and transistor Q1.

[0013] The opto-isolated amplifier circuit includes: resistors R8, R9, and R10; optocoupler TLP521; diode D1; and diode D2.

[0014] The wireless transmission circuit includes: a TWH8778 power switch chip, a KD9562 eight-tone analog sound chip, an FDD-5 radio transmitter chip, resistors R11 and R12, an intermediate relay KA1, diodes D3 and D4, a 9V power supply BAT, capacitors C6 and C7, and antenna II.

[0015] Furthermore, in the proximity alarm circuit, one end of antenna I is connected to the antenna pin of proximity sensing chip JW0818; the other end of antenna I is floating as a radiator; one end of the power supply pin VDD of proximity sensing chip JW0818 is connected to the power supply network VDD, and the other end of the power supply pin VDD of proximity sensing chip JW0818 is connected to one end of capacitor C2 and capacitor C3; the other ends of capacitor C2 and capacitor C3 are connected together to system ground Vss; one end of the reference voltage pin Vref of proximity sensing chip JW0818 is connected to one end of the voltage divider resistor network; the other end of the voltage divider resistor network is connected to VDD and Vss, forming a reference voltage divider structure; one end of the crystal oscillator input pin OSCI of proximity sensing chip JW0818 is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the crystal oscillator output pin OScO, forming a Pierce oscillator structure.

[0016] Furthermore, the proximity alarm circuit is powered by a 3V BAT power supply.

[0017] Furthermore, the pulse output signal of the proximity alarm circuit OUT is transmitted and input to the opto-isolated amplifier circuit; one end of the anode of the LED of the optocoupler TLP521 is connected to one end of the power supply VDD via the resistor R8; the other end of the cathode of the LED is connected to the external control signal input node; one end of the collector of the phototransistor of the optocoupler TLP521 is connected to one end of the resistor R9 and together they form the output OUT1; the other end of the phototransistor is connected to ground.

[0018] Furthermore, in the wireless transmission circuit, one end of antenna II is connected to one end of the ANT pin of U3, and the other end of antenna II is suspended as a radiator; one end of the power supply pin VDD of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the system ground VSS; one end of the oscillation input pin OSC1 of the TWH8778 power switch chip is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the oscillation output pin OSC2 of the TWH8778 power switch chip, forming a clock source structure; ... GND of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the 9V power supply, and One end of the source control pin BAT is connected to 9V via resistor R11 and to VSS via capacitor C6, forming a decoupling and backup power supply structure. One end of the audio output pin O / P of the TWH8778 power switch chip is connected to one end of the input pin 2 of the KD9562 eight-tone analog sound chip. One end of the enable pin SEL1 of the KD9562 eight-tone analog sound chip is connected to VSS via a mode selection network. One end of the power supply pin Vs of the KD9562 eight-tone analog sound chip is connected to 9V, and one end of its output pin OUT1 is connected to VSS via load resistor R12, thus forming a hierarchical driving structure of RF-audio-power switch.

[0019] Furthermore, the field transmission terminal box is fixed to the top of the mobile crane boom using a quick-release clamp.

[0020] Furthermore, the upper housing and the lower housing are made of ABS material with an IP65 waterproof rating.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This utility model device has full voltage coverage, strong scene adaptability, and stable signal with low false alarm rate: by adopting level signal output and electromagnetic shielding technology, the anti-interference ability is improved by 40%, and the false alarm rate is reduced from 30% to <5%. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is the circuit diagram of the proximity alarm of this utility model.

[0025] Figure 2 This invention relates to an opto-isolated amplifier circuit.

[0026] Figure 3 This invention relates to a wireless transmitting circuit.

[0027] Figure 4 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the alarm receiving unit of this utility model. Detailed Implementation

[0029] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0036] likeFigures 1-5 As shown, this utility model provides a near-electricity warning device for a mobile truck crane boom, comprising: a field transmitting terminal box and a receiving alarm unit; the receiving alarm unit is installed in the driver's cab; the field transmitting terminal box is fixed to the top of the mobile truck crane boom.

[0037] In this application, as a preferred embodiment, the field transmitting terminal box includes: an upper housing, a built-in circuit, and a lower housing; the built-in circuit is fixed to the lower housing; the built-in circuit includes: a proximity alarm circuit, an opto-isolation amplifier circuit, a power supply unit, and a wireless transmitting circuit. The receiving alarm unit includes: a housing and a wireless receiving circuit. In this application, the receiving alarm unit is a commonly used technical component in the art and therefore will not be described in detail here.

[0038] Preferably, in this application, the proximity alarm circuit includes: antenna I, proximity sensing chip JW0818, resistors R1, R2, R3, R4, R5, R6, and R7, capacitors C1, C2, C3, C4, and C5, power switches S1, S2, S3, S4, and S5, crystal oscillator, 3V power supply BAT, buzzer B1, and transistor Q1.

[0039] The opto-isolated amplifier circuit includes: resistors R8, R9, and R10, optocoupler TLP521, diode D1, and diode D2.

[0040] The wireless transmission circuit includes: a TWH8778 power switch chip, a KD9562 eight-tone analog sound chip, an FDD-5 radio transmitter chip, resistors R11 and R12, an intermediate relay KA1, diodes D3 and D4, a 9V power supply BAT, capacitors C6 and C7, and antenna II.

[0041] like Figure 1As shown, in the proximity alarm circuit, one end of antenna I is connected to the antenna pin of proximity sensing chip JW0818; the other end of antenna I is floating as a radiator; one end of the power supply pin VDD of proximity sensing chip JW0818 is connected to the power supply network VDD, and the other end of the power supply pin VDD of proximity sensing chip JW0818 is connected to one end of capacitor C2 and capacitor C3; the other ends of capacitor C2 and capacitor C3 are connected to the system ground Vss; one end of the reference voltage pin Vref of proximity sensing chip JW0818 is connected to one end of the voltage divider resistor network; the other end of the voltage divider resistor network is connected to VDD and Vss, forming a reference voltage divider structure; one end of the crystal oscillator input pin OSCI of proximity sensing chip JW0818 is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the crystal oscillator output pin OScO, forming a Pierce oscillator structure.

[0042] In this application, the proximity alarm circuit diagram is powered by a 3V BAT power supply.

[0043] In this application, the pulse output signal of the proximity alarm circuit OUT is transmitted and input to the opto-isolated amplifier circuit; one end of the anode of the light-emitting diode of the optocoupler TLP521 is connected to one end of the power supply VDD through the resistor R8; the other end of the cathode of the light-emitting diode is connected to the external control signal input node; one end of the collector of the phototransistor of the optocoupler TLP521 is connected to one end of the resistor R9 and together they form the output OUT1; the other end of the phototransistor is connected to ground.

[0044] As a preferred option, such as Figure 3As shown, in the wireless transmission circuit, one end of antenna II is connected to one end of the ANT pin of U3, and the other end of antenna II is suspended as a radiator; one end of the power supply pin VDD of the TWH8778 power switch chip is connected to the 9V power supply end, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the system ground VSS; one end of the oscillation input pin OSC1 of the TWH8778 power switch chip is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the oscillation output pin OSC2 of the TWH8778 power switch chip, forming a clock source structure; the power supply of the TWH8778 power switch chip... One end of the control pin BAT is connected to 9V via resistor R11 and to VSS via capacitor C6, forming a decoupling and backup power supply structure. One end of the audio output pin O / P of the TWH8778 power switch chip is connected to one end of the input pin 2 of the KD9562 eight-tone analog sound chip. One end of the enable pin SEL1 of the KD9562 eight-tone analog sound chip is connected to VSS via a mode selection network. One end of the power supply pin Vs of the KD9562 eight-tone analog sound chip is connected to 9V, and one end of its output pin OUT1 is connected to VSS via load resistor R12, thus forming a hierarchical driving structure of RF-audio-power switch.

[0045] In a preferred embodiment, the field transmission terminal box is fixed to the top of the mobile crane boom by a quick-release clamp.

[0046] In this application, the upper housing and the lower housing are made of ABS material with an IP65 waterproof rating.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mobile truck crane boom proximity warning device, characterized in that, include: On-site transmitting terminal box and receiving alarm unit; The alarm receiving unit is installed in the driver's cab; The field transmitting terminal box is fixed to the top of the boom of the mobile truck crane; The field transmitting terminal box includes: an upper housing, an internal circuit, and a lower housing; the internal circuit is fixed on the lower housing; the internal circuit includes: a proximity alarm circuit, an opto-isolation amplifier circuit, a power supply unit, and a wireless transmission circuit; The proximity alarm circuit includes: antenna I, proximity sensing chip JW0818, resistors R1, R2, R3, R4, R5, R6, and R7, capacitors C1, C2, C3, C4, and C5, power switches S1, S2, S3, S4, and S5, crystal oscillator, 3V power supply BAT, buzzer B1, and transistor Q1. The opto-isolated amplifier circuit includes: resistors R8, R9, and R10; optocoupler TLP521; diode D1; and diode D2. The wireless transmission circuit includes: a TWH8778 power switch chip, a KD9562 eight-tone analog sound chip, an FDD-5 radio transmitter chip, resistors R11 and R12, an intermediate relay KA1, diodes D3 and D4, a 9V power supply BAT, capacitors C6 and C7, and antenna II.

2. The mobile crane boom proximity warning device according to claim 1, characterized in that, In the proximity alarm circuit, one end of antenna I is connected to the antenna pin of proximity sensing chip JW0818; the other end of antenna I is floating as a radiator; one end of the power supply pin VDD of proximity sensing chip JW0818 is connected to the power supply network VDD, and the other end of the power supply pin VDD of proximity sensing chip JW0818 is connected to one end of capacitor C2 and capacitor C3; the other ends of capacitor C2 and capacitor C3 are connected to the system ground Vss; one end of the reference voltage pin Vref of proximity sensing chip JW0818 is connected to one end of the voltage divider resistor network; the other end of the voltage divider resistor network is connected to VDD and Vss, forming a reference voltage divider structure; one end of the crystal oscillator input pin OSCI of proximity sensing chip JW0818 is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the crystal oscillator output pin OScO, forming a Pierce oscillator structure.

3. The mobile crane boom proximity warning device according to claim 1, characterized in that, The proximity alarm circuit is powered by a 3V BAT power supply.

4. The mobile crane boom proximity warning device according to claim 1, characterized in that, The pulse output signal of the proximity alarm circuit OUT is transmitted to the opto-isolated amplifier circuit; one end of the anode of the LED of the optocoupler TLP521 is connected to one end of the power supply VDD through the resistor R8; the other end of the cathode of the LED is connected to the external control signal input node; one end of the collector of the phototransistor of the optocoupler TLP521 is connected to one end of the resistor R9 and together they form the output OUT1; the other end of the phototransistor is connected to ground.

5. A mobile truck crane boom proximity warning device according to claim 1, characterized in that, In the wireless transmission circuit, one end of antenna II is connected to one end of the ANT pin of U3, and the other end of antenna II is suspended as a radiator; one end of the power supply pin VDD of the TWH8778 power switch chip is connected to the 9V power supply, and one end of the ground pin GND of the TWH8778 power switch chip is connected to the system ground VSS; one end of the oscillation input pin OSC1 of the TWH8778 power switch chip is connected to one end of the crystal oscillator, and the other end of the crystal oscillator is connected to the oscillation output pin OSC2 of the TWH8778 power switch chip, forming a clock source structure; the power control of the TWH8778 power switch chip... One end of pin BAT is connected to 9V via resistor R11 and to VSS via capacitor C6, forming a decoupling and backup power supply structure. One end of the audio output pin O / P of the TWH8778 power switch chip is connected to one end of the input pin 2 of the KD9562 eight-tone analog sound chip. One end of the enable pin SEL1 of the KD9562 eight-tone analog sound chip is connected to VSS via a mode selection network. One end of the power supply pin Vs of the KD9562 eight-tone analog sound chip is connected to 9V, and one end of its output pin OUT1 is connected to VSS via load resistor R12, thus forming a hierarchical driving structure of RF-audio-power switch.

6. The mobile truck crane boom proximity warning device according to claim 1, characterized in that, The field transmission terminal box is fixed to the top of the mobile crane boom using a quick-release clamp.

7. A mobile truck crane boom proximity warning device according to claim 1, characterized in that, The upper and lower housings are made of ABS material with an IP65 waterproof rating.

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