CN201945368U

CN201945368U - Weighing sensor

Info

Publication number: CN201945368U
Application number: CN2010206463023U
Authority: CN
Inventors: 应天通
Original assignee: Zhejiang Congueror Weighing Apparatus Co Ltd
Current assignee: Zhejiang Congueror Weighing Apparatus Co Ltd
Priority date: 2010-12-08
Filing date: 2010-12-08
Publication date: 2011-08-24
Anticipated expiration: 2020-12-08

Abstract

The utility model relates to a weighing sensor, which comprises a sensor shell, wherein a sealing hole and a conducting wire hole are arranged inside the sensor shell, a sensor circuit board is accommodated inside the sealing hole, a conducting wire on the sensor circuit board penetrates through the conducting wire hole to be connected with the exterior, both a welding point on the sensor circuit board and the conducting wire inside the sealing hole are protected by insulating cement, and the conducting wire hole is sealed by a sealing ring through glue water; AB twin-component transparent silica gel is filled inside the sealing hole; and a stainless steel metal sheet is welded on the outer surface of the sensor shell in a laser welding way. Novel multilayer silica-gel filling technique is adopted, and the stainless steel plate is additionally adopted as the mechanical protection, so the sealing grade reaches IP68, the pressure resistance, the explosion preventing capacity and the corrosion resistance of the product can be effectively improved; and in addition, the weighing sensor also has the advantages of convenience in use, strong anti-interference capacity and the like.

Description

A kind of weighing sensor

Technical field:

The utility model relates to a kind of sensor, the weighing sensor that uses in particularly a kind of container weighing system (for example bunker scale formula burden balance).

Background technology:

In order to be suitable for the needs of kinetic measurement, the sensor as system input in weighing system is most important.Special in the container weighing system that uses a plurality of sensor parallel connections, a pair of often contradiction of uncertainty of measurement and measuring speed, both are difficult to get both, and need make compromise selection according to actual conditions.

There are following defectives mostly in the domestic existing LOAD CELLS that is used for feed proportioning system:

1, compensation of the sensitivity temperature of LOAD CELLS and adjustment, all adopt the sensitivity under manual testing's different temperatures to calculate again, on the diagonal line of electric bridge, increase compensating resistance, though can reach higher circuit compensation accuracy requirement, but can not effectively raise the efficiency, if and in weighing system, change LOAD CELLS and must calibrate with counterweight again, extremely inconvenient.

2, the degree of protection of LOAD CELLS is generally IP65, and to rugged environment comparatively, the degree of protection of LOAD CELLS has much room for improvement.

3, the LOAD CELLS output signal is little, poor anti jamming capability, and transmission range is short.

The utility model content:

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, and a kind of easy to use, barrier propterty is strong and antijamming capability is good weighing sensor is provided.

To achieve these goals, the utility model has adopted following technical scheme:

A kind of weighing sensor, comprise sensor housing, be provided with seal bore and wire guide in the described sensor housing, be equipped with sensor circuit board in the seal bore, lead on the sensor circuit board passes with the outside from wire guide and links, solder joint on the described sensor circuit board and the lead that is positioned at described seal bore all adopt insulating gel protection, and described wire guide adopts O-ring seal to pass through glue sealing; The transparent silica gel of embedding AB bi-component in the described seal bore; The outside surface of described sensor housing is welded with the stainless steel metal thin slice by laser bonding.

This weighing sensor is equipped with the intelligent temperature bucking-out system, and described intelligent temperature bucking-out system comprises the sensitivity data automatic acquisition circuit of sensor under different temperatures and the auto compensatng circuit of forming with single-chip microcomputer and can compensate the transducer sensitivity elastic modulus.

It is 0.8 μ s or the above A/D converter of 0.8 μ s that this weighing sensor adopts slewing rate.

This weighing sensor is equipped with self-diagnostic circuit.

The utility model has following advantage with respect to prior art:

1, adopt brand-new multilayer silica gel dosing technology, add corrosion resistant plate and make mechanical protection, the sealing grade reaches IP68, has effectively improved withstand voltage, explosion-proof, the anti-corrosion capability of product.

2, the brand-new intelligent temperature bucking-out system of design, make the sensitivity data collection of sensor under different temperatures, to the calculating of sensor elastic modulus offset data and at different temperature environment points sensor is compensated all and to finish automatically by this system, thereby easy to use.

3, exploitation analog to digital conversion circuit, adopt have higher slewing rate A/D converter, image data is exported with digital signal form, improve the signal antijamming capability.

Description of drawings:

Fig. 1 is the structural representation of the utility model weighing sensor.

Embodiment:

As shown in Figure 1, a kind of weighing sensor comprises sensor housing 1, is provided with seal bore 2 and wire guide 3 in the sensor housing 1, is equipped with sensor circuit board 4 in the seal bore 2, and the lead 5 on the sensor circuit board 4 passes with the outside from wire guide 3 and links.The insulated enclosure of weighing sensor is the pith that improves degree of protection, this weighing sensor has been taked three road safeguard procedures: first road, solder joint 10 on the sensor circuit board 4 and the lead 3 that is positioned at seal bore 2 all adopt 3140 insulating gels 6 to protect, wire guide 3 also adopts O-ring seal 7 by 704 glue sealings, takes duplicate protection; Second road, the transparent silica gel 8 of embedding AB bi-component in the seal bore 2; The 3rd road, the outside surface of sensor housing 1 is welded with stainless steel metal thin slice 9 by laser bonding.By these three roads safeguard procedures, effectively improved withstand voltage, explosion-proof, anti-corrosion capability of product etc.

This weighing sensor is equipped with the intelligent temperature bucking-out system, and the intelligent temperature bucking-out system comprises the sensitivity data automatic acquisition circuit of sensor under different temperatures and the auto compensatng circuit of forming with single-chip microcomputer and can compensate the transducer sensitivity elastic modulus.Auto compensatng circuit has been worked out sensitivity, non-linear, temperature drift, zero point and has been exported compensation software, the offset data memory is in the sensor built-in chip, at different temperature environment points sensor is compensated, make sensor can be under various temperature environments accurately weighing.

It is 0.8 μ s or the above A/D converter of 0.8 μ s that this weighing sensor adopts slewing rate, the signal of the 50KHz that can sample.Whether this weighing sensor is equipped with self-diagnostic circuit, can check continuously by self-diagnostic circuit whether sensor interrupts, exports and obviously go beyond the scope etc.

The foregoing description is only for the usefulness that the utility model is described; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1. weighing sensor, comprise sensor housing, be provided with seal bore and wire guide in the described sensor housing, be equipped with sensor circuit board in the seal bore, lead on the sensor circuit board passes with the outside from wire guide and links, it is characterized in that: solder joint on the described sensor circuit board and the lead that is positioned at described seal bore all adopt insulating gel protection, and described wire guide adopts O-ring seal to pass through glue sealing; The transparent silica gel of embedding AB bi-component in the described seal bore; The outside surface of described sensor housing is welded with the stainless steel metal thin slice by laser bonding.

2. weighing sensor as claimed in claim 1, it is characterized in that: this weighing sensor is equipped with the intelligent temperature bucking-out system, and described intelligent temperature bucking-out system comprises the sensitivity data automatic acquisition circuit of sensor under different temperatures and the auto compensatng circuit of forming with single-chip microcomputer and can compensate the transducer sensitivity elastic modulus.

3. weighing sensor as claimed in claim 1 or 2 is characterized in that: it is 0.8 μ s or the above A/D converter of 0.8 μ s that this weighing sensor adopts slewing rate.

4. weighing sensor as claimed in claim 3 is characterized in that: this weighing sensor is equipped with self-diagnostic circuit.