55results about How to "Easy calibration work" patented technology

The invention belongs to the technical field of integrate circuits and in particular relates to a method for correcting offset of a high-speed high-precision large-range low-power-consumption dynamic comparator. The comparator is a core part of an analog-to-digital converter. The invention provides a new real-time correction method. By utilization of the characteristic that the capacitance value of variable capacitance of a metal oxide semiconductor (MOS) tube working in an inversion layer is linearly continuously variable along with the regulating voltage, load capacitance at the output end of the comparator is subjected to fine adjustment precisely until the differential input of the comparator is zero. The offset voltage generated by mismatch of devices of the comparator and the influence generated by fine adjustment on the output load capacitance of the comparator are counteracted mutually, so that the offset voltage of the comparator is corrected. By the method, the 1sigma offset voltage of the comparator can be effectively reduced by three hundred times and can be reduced to 66 MuV from the typical value of 29.4 mV.

The invention provides a portable audiometry device and audiometry and calibration methods. The portable audiometry device comprises a computer sound card, a double-channel headphone and a listening curve generation module. The computer sound card is used for control of sound card output to send standard sound signals with specific frequency and sound intensity. The double-channel headphone is used for transmitting the standard sound signals sent by the computer sound card into ears to realize interactive air-conduction audiometry with a controlling effect. The listening curve generation module is used for drawing listening curves of people under examination. The double-channel headphone is connected with the computer sound card through and adapter. The adapter comprises a dual-core audio cable, four PG7 copper joints, an audio socket with the diameter of 6.5 micrometers and a case, wherein one end of the dual-core audio cable is connected with an RCA output port of the computer sound card, the other end of the dual-core audio cable is connected with two PG7 copper joints fixed at one end of the case, the rest PG7 copper joints are connected with the audio socket, with the diameter of 6.5 micrometers, disposed at the other end of the case, and the input end of the double-channel headphone is connected with the audio socket.

The invention provides a method for automatically calibrating a terminal in batch, which comprises the following steps: (A) physically setting, connecting the current of all phases of a terminal and the current of relevant phases of a standard meter and a power source in series and connecting the voltage of all phases and the voltages of relevant phases of the standard meter and the power source in parallel; (B) setting configuration and correspondingly configuring the terminal, the standard meter and the power source; (C) establishing serial port connection and connecting a working platform, the terminal, the standard meter and the power source; (D) calibrating the working platform, the calibration comprises data initialization in the zero step, gain calibration in the first step, phase calibration I in the second step, phase calibration II in the third step, phase calibration III in the fourth step and voltage and current calibration in the fifth step; (E) carrying out error detection; and (F) forming a test report.

The invention discloses an electronic instrument voltage detection calibration system and calibration method. The voltage detection calibration system includes a central processing unit, a calibration power supply, a voltage measuring module and a display output module, wherein the central processing unit prestores a calibration voltage value of the calibration power supply, the central processing unit is electrically connected with the calibration power supply or a power supply to be detected through the voltage measuring module, and the display output module is electrically connected with the central processing unit. The voltage detection calibration system provided by the invention realizes automatic calibration of voltage detection, does not need to use a potentiometer structure, effectively reduces hardware cost, at the same time, compared with a traditional mode in which products must be manually calibrated one by one, the automatic calibration mode realized by the voltage detection calibration system greatly saves time consumed by calibration, effectively improves calibration efficiency, facilitates realization of volume production, meanwhile, the problem of difference of each product caused by manual operation does not exist, and calibration precision is effectively improved.

The invention relates to a probe card corrector, wherein a movable platform can slide to a position below a microdevice and a height measurer by a first guidance device on a base, and a probe card is fixedly clamped on the movable platform. The probe card corrector can adopt the following steps for correcting the probe card: carrying out the work of longitudinal and transversal correction and pin regulation on a probe card on the movable platform by using the microdevice and a comparator, moving the movable platform to the position below the height measurer along the first guidance device, continuously measuring the height of the probe card by using the height measurer, and recording the height of each probe through a controller. The process is repeatedly carried out in the way, the pin regulator can accurately, conveniently and rapidly complete the work of the correction of the probe card on the same pin regulation machine.

The invention discloses breeding hen measuring equipment which comprises an outer equipment frame, a feeding device, a body weight scale, a material scale, a control method, a breeding hen management system and a limiting device only allowing a breeding hen to forage each time. A front face and a rear face are arranged on the outer equipment frame, the feeding device comprises a material barrel, the material scale and a feeding driver, the feeding driver is positioned above the material barrel and mounted on the outer equipment frame, a hen feeding notch is arranged on the material barrel which is arranged on the rear portion of the outer equipment frame and connected with a material scale pressure sensor, the limiting device is arranged on the front portion of the outer equipment frame, the body weight scale is arranged below the limiting device, and the hen feeding notch on the material barrel faces the limiting device. The breeding hen measuring equipment can accurately and automatically measure growth performance like daily weight gain, daily feed intake and feed conversion rate of breeding hens and can automatically and continuously collect and record related growth data, thereby being more genuine and more accurate in measured data when compared with the prior art.

The invention discloses a cone beam CT cupping artifact correction method by utilizing an optimized energy function method. The method directly targets to users for re-established slice images and can finish correction work without making any change to original cone beam CT equipment, can carry out cone beam CT cupping artifact correction efficiently, and meanwhile, can improve CT value uniformity of the same substance of the reconstructed image, thereby helping improved volume visualization and development of visualization technology based on threshold value in the reconstructed image. The method is applied to the technical filed of correction of the cone beam CT reconstructed images (image domain).

The invention discloses a data processing method and device as well as a compass calibration method and device and relates to the technical field of computers. Original data acquired by a compass is subjected to coordinate transformation to generate transformed data; the transformed data and the original data are used together as calibration data of the compass; the original data is used for expanding data for calibration; the problem that the data for calibrating the compass is insufficient is solved and subsequent compass calibration work is convenient to carry out.

The invention discloses a calibration stand of a tension monitoring stress hinge pin for a cable disengaging hook, which solves the problem that in the domestic prior art, the tension monitoring stress hinge pin cannot be calibrated. The technical scheme is as follows: the calibration stand comprises a calibration bracket and a hydraulic station with a hydraulic pressure indicator gauge, wherein an oil cylinder connected with the hydraulic station through an oil pipe is arranged on the calibration bracket; a shaft sleeve A and a shaft sleeve B are respectively mounted on two sides of the oil cylinder on the calibration bracket; locking plate adjusting ports are respectively arranged on the shaft sleeve A and the shaft sleeve B; shaft sleeve adjusting bolts are respectively arranged below the shaft sleeve A and the shaft sleeve B; a standard shaft is placed in the shaft sleeve A, and connected with a display and adjusting meter box through a lead; and the to-be-calibrated shaft is adjusted by comparing measured values of the to-be-calibrated shaft and the standard shaft through the display and adjusting meter box. The calibration stand can be used for calibrating the tension monitoring stress hinge pin for the cable disengaging hook at petrochemical docks.

An adjusting method of display brightness of a plasma display device includes making an adjusting graph of deviation brightness; receiving an image displaying signal; defining a plurality of subgraph field combinations and positions of an image picture according to a query table of gray level arranging; calculating the average display rate of the image picture according to the image displaying signal to distribute one maintaining luminous pulse number which is provided for each subgraph field; searching a plurality of subgraph field combinations according to the adjusting graph of deviation brightness to get a compensation value of each maintaining luminous pulse number and obtaining a maintaining luminous pulse number by adding the compensation value with the maintaining luminous pulse number which is calculated by means of the average display rate sends the maintaining luminous pulse through a maintaining driver to cause the plasma device to give out light.

The invention discloses a correcting machine which comprises a worktable (1), a pressure device (3) mounted on the worktable (1) and used for pressing a work piece to be corrected, and supporting blocks (2) arranged at the two ends of the pressure device (3) on the worktable (1) and used for supporting the work piece to be corrected, wherein the pressure device (3) comprises two supporting plates (10); two upper force bearing rods (7) are fixed at the upper ends of the supporting plates (10); a nut supporting frame is fixed on the upper force bearing rods (7); a nut (12) is fixed on the nut supporting frame; a screw rod (6) is screwed in the nut (12); and a wrenching rod (8) is fixed at the upper end of the screw rod (6). Through rotating the wrenching rod, the screw rod is enabled to rotate downwards and rotary motion of a work piece pressing head is converted to linear downward motion, so that the work piece to be corrected is extruded and the aim of correcting the work piece can be achieved. The correcting machine has a simple structure, is convenient to operate, saves time and labor and achieves high correction accuracy.

The invention, which relates to the technical field of sensor calibration, discloses a mounting device for pressure sensor calibration. The mounting device comprises a bottom plate. Supporting columnsare arranged at left and right ends of the upper surface of the bottom plate; a top plate is arranged at the tops of the supporting columns; cylinders are arranged at left and right ends of the lowersurface of the top plate; and a lifting plate is fixedly connected to piston rods of the cylinders. The middle part of the lifting plate is in sliding connection with middle parts of first guiding rods; the lower ends of the first guiding rods are fixedly connected with a fixing plate; and the middle of the upper surface of the fixing plate is in rotation connection with a lower end of a lead screw. A second connecting base is arranged in the middle of the lower surface of the fixing plate; the lower end of the second connecting base is connected with the upper end of a force measuring ring;the lower end of the force measuring ring is connected with a first connecting base; and the lower end of the first connecting base is fixedly connected with a pressing plate. According to the invention, the mounting device has advantages of simple structure and light weight and can move with a vehicle; calibration work can be directly carried out on a construction site conveniently; the convenience is improved; and the mounting device is suitable for application and popularization.

The invention discloses a device for synchronously detecting blood sugar and injecting insulin. The device comprises a syringe, the syringe comprises a needle and a syringe tube with one end connectedto the needle, the front end of an inner cavity of the syringe tube is provided with a front piston including a front piston insert, the front piston insert is a check valve A from the rear to the front, the inner cavity at the other end of the syringe tube is provided with a rear piston, a rear cavity is formed between a rear piston and the front piston, the rear cavity is filled with the insulin, and the rear piston is connected with a piston driving device; a check valve B from the inside to the outside is disposed at the bottom of the front end of the inner cavity of the syringe tube, anda plasma blood sugar detecting device is disposed at the outer end of the check valve B. The device can perform blood sugar detection and insulin injection by one-time needling.

The invention relates to the technical field of solar module production, and particularly discloses an automatic auxiliary apparatus for solar module power tester alignment. The automatic auxiliary apparatus comprises a stand column, a bearing plate, a vacuum generator and a controller, wherein the stand column supports below the bearing plate; a Y-axis feeding mechanism is fixed on the lower surface of the bearing plate; an X-axis feeding mechanism is arranged on the Y-axis feeding mechanism; the Y-axis feeding mechanism is used for driving the X-axis feeding mechanism to move along the Y-axis direction; the X-axis feeding mechanism is provided with a Z-axis feeding mechanism; the X-axis feeding mechanism is used for driving the Z-axis feeding mechanism to move along the X-axis direction; the Z-axis feeding mechanism is provided with a suction cup vacuum generator, and communicated with a suction cup; and the controller is in signal connection with the X-axis feeding mechanism, the Y-axis feeding mechanism, the Z-axis feeding mechanism and the vacuum generator separately. The automatic auxiliary apparatus is high in degree of automation, and capable of relieving workload of working staffs, enabling the alignment to be free, convenient and fast, and greatly improving the production efficiency.

The invention discloses a differential pressure transmitter verification system, relates to the technical field of differential pressure transmitter verification equipment, and mainly aims to provide a differential pressure transmitter verification system capable of quickly, conveniently and accurately verifying and calibrating a differential pressure transmitter and a differential pressure flowmeter. According to the main technical scheme, the differential pressure transmitter verification system comprises a pressure gauge component, a verification component and a pressure supply component, a standard pressure value is provided for the high-pressure end of a differential pressure transmitter through the pressure gauge component, reference pressure is provided for the low-pressure end of the differential pressure transmitter through the pressure supply component, and the verification component is composed of two sets of verification instruments which are communicated with each other. A bypass valve is arranged between the two verification instruments, the two ends of the differential pressure transmitter can be connected or isolated through opening or closing of the bypass valve, the effect of generating a differential pressure value is achieved, and therefore verification and calibration work of the differential pressure type transmitter and the differential pressure type flowmeter can be achieved rapidly, conveniently and accurately. The differential pressure transmitter verification device is mainly used for calibrating the differential pressure transmitter.

The invention provides an ultrasonic detection test block as well as a preparation method and application thereof, and relates to the technical field of ultrasonic detection. The preparation method of the ultrasonic detection test block comprises the following steps: placing a cushion piece at one end between a first base material and a second base material which are stacked, so as to form a crack of which the width is gradually increased from the first ends of the first base material and the second base material to the opposite second ends; fixing the first ends and the second ends of the first base material and the second base material respectively, and then carrying out diffusion welding. The interior of the test block formed by the preparation method provided by the embodiment of the invention has a crack defect with continuous gradually-changed width, the size is convenient to adjust, the test block can reach a micron level, the precision of the prepared test block is remarkably improved, and the test block can be used in ultrasonic detection and can better perform calibration work before testing.

A universal rotor aluminum foot balance degree detection tool disclosed by the present invention comprises a shell, an installation cavity is formed in the shell, four installation pipes are vertically, symmetrically and fixedly connected in the installation cavity, the upper ends of the installation pipes all penetrate out of the upper surface of the shell, four observation pipes are also vertically and fixedly connected in the installation cavity, the observation pipes are made of transparent glass materials, the upper ends of the four observation pipes all penetrate out of the upper surface of the shell, and the four observation pipes are all located on one sides of the four mounting pipes and located on the same horizontal line. According to the invention, by pressing down the rotor, whether the aluminum foot on the rotor is horizontal or not can be observed by observing whether the four buoyancy blocks are located at the same horizontal height or not, so that a user can easily and rapidly check whether the aluminum foot on the rotor is balanced or not only through one pressing action, and then the user can conveniently and rapidly detect the balance degree of the aluminum foot of the rotor.