CN2115340U - Sterilized parameter testing instrument for tin - Google Patents

Abstract

The utility model provides an electronic instrument-a sterilized parameter (F value) testing instrument for a tin. The sterilized parameter (F value) testing instrument for a tin is composed of a metal casing, a display, a button, a sensor, a printer and an electronic element. The sterilized parameter (F value) testing instrument for a tin is an intelligent instrument which is composed of a chip microprocessor. The sterilized parameter for a tin can be accurately tested in time. The sterilized parameter (F value) testing instrument for a tin can display and print state parameters, such as the time, the passage, the temperature, the F value, the date, etc. Therefore, the sterilized technology for a tin can be scientifically and rationally established. The quality of a tin can be ensured. The utility model has the advantages of compact structure, small volume, light weight, and convenient carryover and use. The sterilized parameter (F value) testing instrument for a tin can be used for sterilizers with different types.

Description

Sterilized parameter testing instrument for tin

The utility model relates to a kind of electronic tester, specifically is a kind of sterilization of canned food parameter tester.

Sterilization of canned food parameter is commonly referred to the F value, its letter justice be in sterilization of canned food process under constant Heating temperature (being generally 121 ℃), kill the required time of the bacteriotrophy body (or brood cell) of some amount (minute).Tinned pre-sterilization parameter (F value) is measured by present domestic can manufacturer, is to measure the can core temperature with the core temperature tester earlier, and the conversion of tabling look-up is again come out.Its shortcoming is that measuring process is loaded down with trivial details, and the time is long, and wayward, causes sterilization not enough or cross sterilization easily, especially the numerical value of surveying inaccurate, be difficult to guarantee the can quality, directly influence product both at home and abroad, foreign market particularly.National expenditures electronic machines such as external Germany, Denmark are surveyed the F value, and so its complex structure costs an arm and a leg, the incompatibility China's national situation.

The utility model provides a kind of sterilization of canned food parameter tester, purpose is to measure in time, exactly sterilization of canned food parameter, and directly show and print each state parameter value of sterilization process, be convenient to science in the tinned pre-production and reasonably formulate process for sterilizing, guarantee the quality of tinned pre-.

The purpose of this utility model realizes by following technical solution.Tester comprises metal chassis, indicating meter, keyboard, and parts such as transmitter, printer, clock and electronic component, Fig. 1 is its functional block diagram.Its major technique feature is: circuitry is by the main circuit board assembly, channel components, printer module, display plate component, button assembly and power supply module six parts are formed, and the main circuit board assembly is made the master control chip with 8031 chip microprocessors, with the mode expansion I/O interface of memory map, data processing adopts three byte floating numbers, by the Qin's nine splendid algorithm computings.Fig. 2 is its computing block diagram and program, master routine (Fig. 3) and interrupt service subroutine (Fig. 4, Fig. 5) write in the 8KBEPROM2764 memory, LSI8155 by the I/O mouth finishes external RAM and I/O expansion, the linear transformation mode is adopted in scale conversion, adopt the mode of digital zero setting to come calibrated offset and gain error, eliminate periodic interference signals and random disturbance signal respectively with the double integration A/D converter and the arithmetical av method in the program filtering method of the integral multiple that equals 20MS integral time; Metering circuit selects for use thermopair to make transmitter, is furnished with transmodulator, amplifier, compensating circuit and channel selection circuit etc.When tester is worked, record can cold-point temperature in the sterilization process by transmitter, send into main frame with millivolt signal, amplify through amplifier, convert numerary signal to by A/D converter, input chip microprocessor 8031 calculates can cold-point temperature and corresponding F value, at last temperature and F value are shown through LED, go out display result by printer prints simultaneously.

The utility model is the intelligence instrument that is made of chip microprocessor, compare with existing testing instrument, have following advantage: 1, owing to select for use the thermopair of copper one constantan material to make transmitter, 12 monolithic a/d converters and 8031 microprocessors, it is high to measure spirit, and error is little, ≤ ± 1 ℃, highly sensitive, resolving power is 0.1 ℃, and useful range is big, be 0～150 ℃, good stability.2, the employing of integrated circuit block makes it compact construction, volume is little, in light weight, good looking appearance, easy to carry, but both extended immobilization is used, and is applicable to roving working space again.3, topology layout is reasonable, is convenient to installation and maintenance, and power down protection and power down emergency schedule are arranged.4, has multiple function, except that showing F value and temperature value, also has time display, passage shows, printing gap shows, with " F " value key or " temperature " strong and " shift " be used, can show maximum/minimum F value or the highest/minimum temperature value, and parameters such as time, passage, temperature, F value, date are printed.5, adaptability is strong, can be used for dissimilar disinfection equipments, satisfies tinned pre-to sterilization parameter request needs accurately, to ensureing people ' s health and opening up aspect such as world market and will play a positive role.

Description of drawings:

Fig. 1---functional block diagram Fig. 2---8031 computing block diagrams

Fig. 3---main program block diagram Fig. 4, Fig. 5---interrupt service subroutine block diagram.

Preferred embodiment of the utility model is as follows:

The pre-treatment of data: adopt the linear transformation mode, the dimensionless number amount of A/D conversion output has been converted to dimensional numerical value, so that computing, eliminate at input circuit with the method for digital zero setting, the skew of amplifying circuit, transmodulator itself and the various drift influences that take place with temperature in time, adopt the interpolation polynomial offset value calculation, to realize thermopair---the conversion of temperature.Main control chip is the WCS-51 series monolithic 8031 of INTEL, realize the expansion of I/O interface with the mode of memory map, satisfying actual needs, transmitter is the calibration number copper-constantan thermocouple for T, I level, and transmodulator is 12 monolithic a/d converter ICL7109; Amplifier is ultralow offset voltage amplifier OP-07, compensate as cold junction compensation with bridge-type, amplifying circuit has anti-50HZ series mode interference ability, for satisfying test request, with A/D converter and amplifying circuit order assignment in time, structure constitutes 8 lane testings, and distributor circuit selects 1CMOS analog switching circuit CD4051 with 8, with 8KBEPROM2764 is memory under program, finishes external RAM and I/O expansion by LSI8155.Printer is miniature dot-matrix printer; Keyboard-display circuit INTEL8279 keyboard display interface circuit able to programme, test circuit needs ± 5V, ± 15V and a suspension 961,5mv voltage, for convenient and reliable, power-supply system has a standby power supply that charges automatically, and it is dual-purpose to make it AC and DC, is series voltage regulator with 7806, reversal of pole ICL7660, DC-DC adopts the ZF411 module.

Claims (3)

1, a kind of sterilization of canned food parameter tester, comprise casing, indicating meter, by strong, transmitter, printer and electronic component etc., it is characterized in that circuitry is by the main circuit board assembly, channel components, printer module, display plate component, form by strong assembly and power supply module six parts, the main circuit board assembly is made the master control chip with 8031 chip microprocessors, mode expansion I/O interface with the memory map, data processing adopts three byte floating numbers, master routine and interrupt service subroutine write in the 8KBEPROM2764 memory, LSI8155 by the I/O mouth finishes external RAM and I/O expansion, the linear transformation mode is adopted in scale conversion, adopt the mode of digital zero setting to come calibrated offset and gain error, double integration A/D converter and the arithmetical av method in the program filtering method with the integral multiple that equals 20MS integral time are eliminated periodic interference signals and random disturbance signal respectively, and its metering circuit selects for use thermopair to make transmitter, is furnished with transmodulator, amplifier, compensating circuit and channel selecting circuit.

2, tester according to claim 1 is characterized in that transmitter is that calibration number is the copper-constantan thermocouple of I level for T, grade, and transmodulator is 12 monolithic a/d converter ICL7109; Amplifier is ultralow offset voltage amplifier OP-07; As cold junction compensation, distributor circuit selects 1CMOS analog switching circuit CD451 with 8 with the bridge-type compensation, to realize channel selecting.

3, tester according to claim 1, it is characterized in that adopting miniature dot-matrix printer to make take-off equipment, with the inclined to one side journey keyboard and display interface of INTEL8279 circuit, is series voltage regulator with 7806, ICL7660 is adopted in reversal of pole, and DC-DC adopts the ZF411 module.

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