CN2490580Y

CN2490580Y - Portable quickly electrical measuring instrument for fresh cocoon dry shell quantity

Info

Publication number: CN2490580Y
Application number: CN 01244522
Authority: CN
Inventors: 张友信
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-25
Filing date: 2001-06-25
Publication date: 2002-05-08
Anticipated expiration: 2011-06-25

Abstract

The utility model provides a portable quickly electrical measuring instrument for fresh cocoon dry shell quantity, which at least comprises an electronic weighing sensor(10), an electronic temperature sensor(21), a resistance sensor, a single-chip machine with software programs, an A/D conversion circuit, an amplification circuit and a display circuit and is characterized in that all component parts of the utility model are arranged inside a casing(1), wherein the resistance sensor is supported on the electronic weighing sensor(10) arranged on the casing(1), the casing is provided with a limitation protection structure limiting the deflection of the electronic weighing sensor(10); the resistance sensor is formed by two battery lead plates which form a pressure holding structure, a whole holding space is left between the two battery lead plates, a back part of one of the two battery lead plates is provided with an elastic member, the opening and closing of the two battery lead plates are completed by a snap close structure. The utility model has the advantages of integration, miniaturization, testing automation and precision, and is suitable to be popularized around all urban and rural silkworm and fresh cocoon acquisition stations in china.

Description

The quick electric pilot of portable fresh silkworm cocoon dry shell amount

The utility model relates to a kind of determinator of bright Dried Cocoon Shell Weight, thereby is specifically related to a kind ofly adopt electronic scales to weigh up the cocoon layer commercial weight to utilize electric-resistivity method to record the electric pilot that water content of cocoon shell obtains fresh silkworm cocoon dry shell amount fast simultaneously.

Fresh silkworm cocoon dry shell amount is the important indicator of bright cocoon classification of China and grading standard.So-called dry shell amount is meant and extracts representational sample cocoon from bright cocoon, and from wherein extracting the bright light of the sample 50 grams cocoon of getting on the bus, the whole sample cocoons of sectility are the dry shell amount value with the bright cocoon shell baking of sample to anhydrous constant again.

In the fresh silkworm cocoon acquisition process, fresh silkworm cocoon dry shell amount is measured and not only is related to silkworm raiser's economic interests, and is related to national economic interest.In order to embody the fairness doctrine of fixing the price according to the quality, it is a tender subject that bright for a long time cocoon dry measure is measured always.In the prior art, representative fresh silkworm cocoon dry shell amount cocoon selecting device mainly contains two big classes, one class is computer cocoon selecting device and temperature control oven, and the model that has dropped into product development at present has: the full-automatic Tester of Dried Cocoon Shell Weight of YJGI type (production of changzhou the 5th Electronic Instruments Plant); DP100 type computer cocoon selecting device (production of jiangsu wuxi county weighing apparatus factory); ZSP-91 type computer cocoon selecting device multiple products such as (productions of four leaf electrical equipment development companies of Silk Science Research Inst., Zhejiang).This class cocoon selecting device generally is made up of electronic scales, system controlled by computer and temperature control oven three parts, and advantage is simple in structure, and measuring accuracy is higher, and shortcoming is that measuring speed is slow, generally more than 30 minutes.Another kind of is dry shell amount and water content of cocoon shell automatic measuring instrument, as China's Gazette of Patent for Invention in August 29 nineteen ninety a disclosed name be called " fresh silkworm cocoon dry shell amount and water percentage auto testing instrument ", publication number is CN1044989A, and application number is 89104137.0 application for a patent for invention.This auto testing instrument is made up of test sensing anchor clamps, electronic scales, thermometer, amplifying circuit, D/A converting circuit and microcomputer, its advantage is that the physical quantity that the modern electric detecting technology of utilization is correlated with to bright cocoon water percentage, dry shell amount is measured, can no-anatomy cocoon, not cocoon drying shell can rapid test sample cocoon dry shell amount and water content of cocoon shell, and can settle accounts, subsidiary function such as printing.But shortcoming is: it is independent mutually mutually in the space 1, to weigh, survey water, hygrometric and computing machine part, is not integral structure, carries inconvenience is installed; 2, in the dry shell amount mensuration process, weigh, survey three independent values that water, hygrometric sensor records and will manually import computing machine by keyboard and handle, operate very loaded down with trivial details; 3, test sensing anchor clamps are divided into tens equal little lattice, bright cocoon of clamping is measured about all adopting two current-carrying plates in each little lattice, such anchor clamps form not only causes the device structure complexity, and the structure measurement error of this measuring resistance in parallel is bigger, can not objectively respond the average electrical resistance of cocoon layer colony, but less than the individual resistance value of resistance value minimum in the cocoon layer colony.In a word,, have certain advance although this tester has used modern electric detecting technology and computer technology, because of poor practicability, complex structure, price is expensive not to be accepted by market

The utility model purpose provides a kind of portable electric pilot of fast, accurately measuring fresh silkworm cocoon dry shell amount.

For achieving the above object, the technical solution adopted in the utility model is: the quick electric pilot of a kind of portable fresh silkworm cocoon dry shell amount, form by single-chip microcomputer, analog to digital conversion circuit, amplifying circuit, sample circuit and the display circuit of electronic load cell, electronic temperature transmitter, resistance sensor, band software program at least.Above-mentioned each ingredient all is placed in the casing, and wherein, resistance sensor is bearing on the electronic load cell, and electronic load cell is bearing on the casing, and casing is provided with the position limitation protection structure of restriction electronic load cell deflection; Described resistance sensor forms the pressure clamp structure by two electrode plate and constitutes, and an integral retaining space is arranged between two electrode plate, and wherein an electrode plate is provided with elastic component behind, passes through the buckle structure folding between two electrode plate.

In the technique scheme, described " supporting " its core is the effect of power, in other words is that the below object bears the top weight of object, cause in the annexation of top object and below object, and be fixedly connected generally speaking, can not fixedly connected also.Acting on of described " position limitation protection structure " is that the restrained deformation amount is protected electronic load cell.Sensor can not damage too greatly or loses precision at work because of stressed like this.

In the technique scheme, resistance sensor preferred plan is: be made up of lower electrode plate, electric pole plate, pressing plate, spring, insulation sample box, lid and hasp, lower electrode plate is fixed on the sample box inner bottom surface, electric pole plate is fixed on the pressing plate bottom surface, pressing plate by spring suspension on the lid inner top surface, one end of lid is connected with sample box by hinge, and the other end is connected with the sample box folding by hasp.This structure is a preferred plan.In order to make bright cocoon claim sample more convenient, can be provided with a uncovered sample weighting disk on the outer end face of lid.

In the technique scheme, to be the diplopore beam type be made of square shape skeleton and the foil gauge that is attached to up and down on two corresponding sides described electronic load cell, two corresponding sides about it, one downward from the top, another makes progress from the bottom, be respectively two force sides, the bottom of resistance sensor is fixed on downward force side, top by horizontal cantilever, the force side that makes progress, bottom by screw retention on the support of casing or casing, the center line of resistance sensor and the central lines of electronic load cell.Electronic load cell also can adopt other form and structure.

In the technique scheme; described position limitation protection structure can be made up of position limitation protection circle and reference rings, and the position limitation protection circle is fixed on the casing, and its medial surface is provided with ring groove; reference rings is fixed on the outer rim of sample box side, and reference rings is gapped to be placed in the ring groove of position limitation protection circle.Described position limitation protection structure also can be made of stop screw, and stop screw is located on the support in casing or the casing, and its head is near being limited the member solid object surface.Above two kinds of position limitation protection structures can also be used simultaneously.

In the technique scheme, electronic temperature transmitter can be placed in the sample box, also can be placed in any position of casing that can fully reflect environment temperature, and the output of electronic temperature transmitter is connected with circuit by lead.

In the technique scheme,, can also increase voice reader and related circuit, print interface circuit etc. in order to strengthen the function of electric pilot.

The utility model principle of work is: have higher insulating property according to dry silk, absorb moisture again easily, and water is weak electrolyte, has electric conductivity, so there are the principle of linear-logarithmic relation in bright cocoon water content of cocoon shell and its electric conductivity, utilize battery lead plate pressure type electric resistance sensor to measure water content of cocoon shell, and carry out the temperature correction through the temperature value that electronic temperature transmitter is measured and obtain actual water percentage, the cocoon layer commercial weight deduction water percentage that at last electronic load cell is measured partly obtains the dry shell amount of bright cocoon.

The relation of above-mentioned bright cocoon cocoon layer resistance value and water percentage need record by experiment that (standard temperature is meant unified temperature under standard temperature, as normal temperature), the corresponding relation of bright cocoon water content of cocoon shell and resistance value, also to record the temperature correction function relation of the corresponding resistance value of water percentage under different temperatures simultaneously by experiment, utilize this funtcional relationship that the water percentage that records is carried out the actual water percentage that the temperature correction just can obtain cocoon layer.Under the satisfactory prerequisite of measuring accuracy, this temperature correction coefficient can replace with the approximate value constant.Thereby the utility model only draws fresh silkworm cocoon dry shell amount by test weight, resistance value, these three cocoon layer physical quantitys of temperature in a word.

The utility model using method and operating process are:

1, with sample weighting disk weighing hair cocoon 50 grams, takes off a mao cocoon, dial and remove husks, cut out the cocoon shell and remove pupa and cast off a skin remaining cocoon shell;

2, above-mentioned cocoon shell is put into sample box, cover snap close on the Hasp lock, this moment, the cocoon shell was in the clamping of two electrode plate, and elastic component provides certain holding force;

3, press dry shell amount button on the lower panel, circuit records cocoon shell weight by electronic load cell, record cocoon shell resistance value by battery lead plate pressure type electric resistance sensor, record temperature value by electronic temperature transmitter, then under computer software programs control, at first convert the resistance value that records to the standard aqueous rate by empirical formula, carry out the temperature correction with the temperature value that records by empirical formula again and obtain actual water percentage, the cocoon layer commercial weight that obtains of will weighing is at last deducted actual water percentage and is partly drawn fresh silkworm cocoon dry shell amount.These processes are all finished by computing machine automatically at startup dry shell amount button, and the time is about 1 second.

The utility model can be provided with the measurement of water-content coefficient function separately when the dry shell amount test function is set, know the actual water percentage of cocoon layer if desired, as long as press the water percentage button, can directly show water percentage numerical value by display device.Also can be provided with weigh, add up, subsidiary functions such as 50 gram corrections, voice, printing.These functions just can realize as long as increase corresponding hardware and software on the such scheme basis.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1, because the utility model will be weighed, measuring resistance, thermometric degree sensor and single chip computer device and interlock circuit are integrated in the casing, the miniaturization of tester, integrated and practicability have really been realized.

2, be cocoon layer integral retaining mode owing to the utility model resistance sensor forms the pressure clamp structure by two electrode plate, each individuality is a kind of string and mixed structure in colony, this mixed structure has been represented the average electrical resistance of this colony preferably, both made in the colony cocoon layer moisture inhomogeneous, even difference may be very big, but test the average level that has embodied resistance preferably by colony, so measurement structure more accurately and reliably.

3, since the utility model when measuring dry shell amount except that weighing 50 gram hair cocoons with cut open the cocoon, all the other measuring processes are almost carried out simultaneously, and finish automatically about 1 second, automatization level height not only compared with prior art, and measuring speed improves greatly.

4, be bearing on the electronic load cell owing to the utility model resistance sensor, electronic load cell is bearing on the casing, its effect of the technical conceive of this structural design: the one, cocoon layer is weighed and measuring resistance can carry out simultaneously, lays the foundation for improving measuring speed; The 2nd, compact conformation, stressed reasonable, therefore obtained satisfied effect.

5, the utility model has been established a uncovered sample weighting disk in addition on the outer end face of lid, and this sample weighting disk is exclusively used in weighing 50 gram hair cocoons, does not need shared sample box, brings convenience for like this user's practical operation.

6, in order to protect the electronic load cell precision, the utility model is provided with the position limitation protection structure specially, and this structure limits with the deformation space of comparatively simple form to sensor, thereby has obtained effect preferably.

7, only about 30cm, volume is little in light weight, and is easy to carry for the utility model casing length, is suitable for town and country in all parts of the country fresh silkworm cocoon purchase website and applies.

Accompanying drawing 1 is the utility model example structure cut-open view;

Accompanying drawing 2 is opened the cut-open view of case lid and sample lid state for the utility model embodiment;

Accompanying drawing 3 is opened vertical view behind the case lid for the utility model embodiment;

Accompanying drawing 4 is the utility model electricity theory diagram.

Wherein: [1], casing; [2], sample weighting disk; [3], spring; [4], pressing plate; [5], hasp; [6], sample box; [7], lid; [8], electric pole plate; [9], lower electrode plate; [10], LOAD CELLS; [11], stop screw; [12], base plate; [13], column; [14], panel; [15], hinge; [16], position limitation protection circle; [17], reference rings; [18], cantilever; [19], supporting; [20], set screw; [21], temperature sensor; [22], weights; [23], loudspeaker; [24], verification socket; [25], keyboard; [26], numeral shows.

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: shown in accompanying drawing 1～accompanying drawing 4, the quick electric pilot of a kind of portable fresh silkworm cocoon dry shell amount is made of cabinet, sensor and circuit three parts.Cabinet is made up of casing [1], panel [14], support, position limitation protection structure; sensor is made up of electronic load cell [10], electronic temperature transmitter [21] and resistance sensor, and circuit is made up of single-chip microcomputer, analog to digital conversion circuit, temperature measurement circuit, the circuit of weighing, measuring resistance circuit, display circuit, sound circuit and the print interface circuit of band software program.Casing [1] is made up of drain pan and loam cake, and above-mentioned each ingredient all is placed in the casing [1], wherein, resistance sensor is bearing on the electronic load cell [10], electronic load cell [10] is bearing on the support, and support hangs on the panel [14], and panel [14] is bearing on the drain pan.Support is made up of a base plate [12], 4 root posts [13] and 4 set screw [20], 4 root posts are lifted on panel [14] bottom surface by screw, its lower end is fixing with base plate [12] by 4 set screw [20], panel [14] central authorities have a macropore, and resistance sensor is located in the macropore and with the macropore hole wall has the free gap.

Described resistance sensor is made up of lower electrode plate [9], electric pole plate [8], pressing plate [4], 4 springs [3], insulation sample box [6], lid [7], hasp [5] and sample weighting disk [2], lower electrode plate [9] is fixed on sample box [6] inner bottom surface, electric pole plate [8] is fixed on pressing plate [4] bottom surface, pressing plate [4] is suspended on lid [7] inner top surface by 4 springs [3], one end of lid [7] is connected with sample box [6] by hinge [15], the other end is connected with sample box [6] folding by hasp [5], and uncovered sample weighting disk [2] is fixed on the outer end face of lid [7].

Described electronic load cell [10] is made of square shape skeleton and the foil gauge that is attached to up and down on two corresponding sides for the diplopore beam type, two corresponding sides about it, one downward from the top, another makes progress from the bottom, be respectively two force sides, the bottom of resistance sensor is fixed on downward force side, top by 2 supportings [19] and horizontal cantilever [18], the force side that makes progress, bottom by screw retention on base plate [12], the central lines of the center line of resistance sensor and electronic load cell [10].

The position limitation protection structure of described restriction electronic load cell [10] deflection has a space position limitation protection structure and a unidirectional position limitation protection structure.Space position limitation protection structure is made up of position limitation protection circle [16] and reference rings [17]; position limitation protection circle [16] is fixed on by the macropore aperture of panel [14]; its medial surface is provided with ring groove; reference rings [17] is fixed on the outer rim of sample box [6] side correspondence position; reference rings [17] is gapped to be placed in the ring groove of position limitation protection circle [16], thereby by gap restriction sample box [6] space displacement amount.Unidirectional position limitation protection structure is made of stop screw [11], and stop screw [11] is located at base plate [12], and its head is near beam type electronic load cell [10] square shape skeleton swinging end bottom surface, thus the distance that the restriction swinging end moves down.

Electronic temperature transmitter [21], loudspeaker [23], digital display tube and various action button all are located on the panel [14].Described button is proofreaied and correct, is removed the peel and form by dry shell amount, water percentage, printing, voice, deletion, removing, statistics removing, statistics, 50 grams.Also join on the panel [14] by proofreading and correct weights [22] and verification socket, this verification socket is used for verification resistance value water percentage just.

Claims

1, the quick electric pilot of a kind of portable fresh silkworm cocoon dry shell amount, at least form by single-chip microcomputer, analog to digital conversion circuit, amplifying circuit, sample circuit and the display circuit of electronic load cell [10], electronic temperature transmitter [21], resistance sensor, band software program, it is characterized in that: above-mentioned each ingredient all is placed in the casing [1], wherein, resistance sensor is bearing on the electronic load cell [10], electronic load cell [10] is bearing on the casing [1], and casing [1] is provided with the position limitation protection structure of restriction electronic load cell [10] deflection; Described resistance sensor forms the pressure clamp structure by two electrode plate and constitutes, and an integral retaining space is arranged between two electrode plate, and wherein an electrode plate is provided with elastic component behind, passes through the buckle structure folding between two electrode plate.

2, electric pilot according to claim 1, it is characterized in that: described resistance sensor is made up of lower electrode plate [9], electric pole plate [8], pressing plate [4], spring [3], insulation sample box [6], lid [7] and hasp [5], lower electrode plate [9] is fixed on sample box [6] inner bottom surface, electric pole plate [8] is fixed on pressing plate [4] bottom surface, pressing plate [4] is suspended on lid [7] inner top surface by spring [3], one end of lid [7] is connected with sample box [6] by hinge [15], and the other end is connected with sample box [6] folding by hasp [5].

3, electric pilot according to claim 2 is characterized in that: the outer end face of described lid [7] is provided with a uncovered sample weighting disk [2].

4, electric pilot according to claim 1; it is characterized in that: described position limitation protection structure is made up of position limitation protection circle [16] and reference rings [17]; position limitation protection circle [16] is fixed on the casing [1]; its medial surface is provided with ring groove; reference rings [17] is fixed on the outer rim of sample box [6] side, and reference rings [17] is gapped to be placed in the ring groove of position limitation protection circle [16].

5, electric pilot according to claim 1 is characterized in that: described position limitation protection structure is made of stop screw [11], and stop screw [11] is located on the support in casing [1] or the casing [1], and its head is near being limited the member solid object surface.

6, electric pilot according to claim 1, it is characterized in that: described electronic load cell [10] is made of square shape skeleton and the foil gauge that is attached to up and down on two corresponding sides for beam type, two corresponding sides about it, one downward from the top, another makes progress from the bottom, be respectively two force sides, the bottom of resistance sensor is fixed on downward force side, top by horizontal cantilever [18], the force side that makes progress, bottom by screw retention on the support of casing [1] or casing [1], the central lines of the center line of resistance sensor and electronic load cell [10].